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ruby/io.c

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186 KiB
C
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/**********************************************************************
io.c -
$Author$
created at: Fri Oct 15 18:08:59 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "ruby/ruby.h"
#include "ruby/io.h"
#include "ruby/signal.h"
#include "vm_core.h"
#include <ctype.h>
#include <errno.h>
#define free(x) xfree(x)
#if defined(DOSISH) || defined(__CYGWIN__)
#include <io.h>
#endif
#include <sys/types.h>
#if !defined(_WIN32) && !defined(__DJGPP__)
# if defined(__BEOS__)
# include <net/socket.h>
# else
# include <sys/socket.h>
# endif
#endif
#if defined(MSDOS) || defined(__BOW__) || defined(__CYGWIN__) || defined(_WIN32) || defined(__human68k__) || defined(__EMX__) || defined(__BEOS__)
# define NO_SAFE_RENAME
#endif
#if defined(MSDOS) || defined(__CYGWIN__) || defined(_WIN32)
# define NO_LONG_FNAME
#endif
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(sun) || defined(_nec_ews)
# define USE_SETVBUF
#endif
#ifdef __QNXNTO__
#include "unix.h"
#endif
#include <sys/types.h>
#if defined(HAVE_SYS_IOCTL_H) && !defined(DJGPP) && !defined(_WIN32) && !defined(__human68k__)
#include <sys/ioctl.h>
#endif
#if defined(HAVE_FCNTL_H) || defined(_WIN32)
#include <fcntl.h>
#elif defined(HAVE_SYS_FCNTL_H)
#include <sys/fcntl.h>
#endif
#if !HAVE_OFF_T && !defined(off_t)
# define off_t long
#endif
#include <sys/stat.h>
/* EMX has sys/param.h, but.. */
#if defined(HAVE_SYS_PARAM_H) && !(defined(__EMX__) || defined(__HIUX_MPP__))
# include <sys/param.h>
#endif
#if !defined NOFILE
# define NOFILE 64
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYSCALL_H
#include <syscall.h>
#elif defined HAVE_SYS_SYSCALL_H
#include <sys/syscall.h>
#endif
extern void Init_File(void);
#ifdef __BEOS__
# ifndef NOFILE
# define NOFILE (OPEN_MAX)
# endif
#include <net/socket.h>
#endif
#include "ruby/util.h"
#ifndef O_ACCMODE
#define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
#endif
#if SIZEOF_OFF_T > SIZEOF_LONG && !defined(HAVE_LONG_LONG)
# error off_t is bigger than long, but you have no long long...
#endif
#ifndef PIPE_BUF
# ifdef _POSIX_PIPE_BUF
# define PIPE_BUF _POSIX_PIPE_BUF
# else
# define PIPE_BUF 512 /* is this ok? */
# endif
#endif
VALUE rb_cIO;
VALUE rb_eEOFError;
VALUE rb_eIOError;
VALUE rb_stdin, rb_stdout, rb_stderr;
VALUE rb_deferr; /* rescue VIM plugin */
static VALUE orig_stdout, orig_stderr;
VALUE rb_output_fs;
VALUE rb_rs;
VALUE rb_output_rs;
VALUE rb_default_rs;
static VALUE argf;
static ID id_write, id_read, id_getc, id_flush, id_encode, id_readpartial;
static VALUE sym_mode, sym_perm, sym_extenc, sym_intenc, sym_encoding, sym_open_args;
struct timeval rb_time_interval(VALUE);
struct argf {
VALUE filename, current_file;
int gets_lineno;
int init_p, next_p;
VALUE lineno;
VALUE argv;
char *inplace;
int binmode;
rb_encoding *enc, *enc2;
};
static int max_file_descriptor = NOFILE;
#define UPDATE_MAXFD(fd) \
do { \
if (max_file_descriptor < (fd)) max_file_descriptor = (fd); \
} while (0)
#define UPDATE_MAXFD_PIPE(filedes) \
do { \
UPDATE_MAXFD((filedes)[0]); \
UPDATE_MAXFD((filedes)[1]); \
} while (0)
#define argf_of(obj) (*(struct argf *)DATA_PTR(obj))
#define ARGF argf_of(argf)
#ifdef _STDIO_USES_IOSTREAM /* GNU libc */
# ifdef _IO_fpos_t
# define STDIO_READ_DATA_PENDING(fp) ((fp)->_IO_read_ptr != (fp)->_IO_read_end)
# else
# define STDIO_READ_DATA_PENDING(fp) ((fp)->_gptr < (fp)->_egptr)
# endif
#elif defined(FILE_COUNT)
# define STDIO_READ_DATA_PENDING(fp) ((fp)->FILE_COUNT > 0)
#elif defined(FILE_READEND)
# define STDIO_READ_DATA_PENDING(fp) ((fp)->FILE_READPTR < (fp)->FILE_READEND)
#elif defined(__BEOS__)
# define STDIO_READ_DATA_PENDING(fp) (fp->_state._eof == 0)
#elif defined(__VMS)
# define STDIO_READ_DATA_PENDING(fp) (((unsigned int)(*(fp))->_cnt) > 0)
#else
# define STDIO_READ_DATA_PENDING(fp) (!feof(fp))
#endif
#if defined(__VMS)
#define fopen(file_spec, mode) fopen(file_spec, mode, "rfm=stmlf")
#define open(file_spec, flags, mode) open(file_spec, flags, mode, "rfm=stmlf")
#endif
#define GetWriteIO(io) rb_io_get_write_io(io)
#define READ_DATA_PENDING(fptr) ((fptr)->rbuf_len)
#define READ_DATA_PENDING_COUNT(fptr) ((fptr)->rbuf_len)
#define READ_DATA_PENDING_PTR(fptr) ((fptr)->rbuf+(fptr)->rbuf_off)
#define READ_DATA_BUFFERED(fptr) READ_DATA_PENDING(fptr)
#define READ_CHECK(fptr) do {\
if (!READ_DATA_PENDING(fptr)) {\
rb_thread_wait_fd((fptr)->fd);\
rb_io_check_closed(fptr);\
}\
} while(0)
#ifndef S_ISSOCK
# ifdef _S_ISSOCK
# define S_ISSOCK(m) _S_ISSOCK(m)
# else
# ifdef _S_IFSOCK
# define S_ISSOCK(m) ((m & S_IFMT) == _S_IFSOCK)
# else
# ifdef S_IFSOCK
# define S_ISSOCK(m) ((m & S_IFMT) == S_IFSOCK)
# endif
# endif
# endif
#endif
#if defined(_WIN32)
#define is_socket(fd, path) rb_w32_is_socket(fd)
#elif !defined(S_ISSOCK)
#define is_socket(fd, path) 0
#define shutdown(a,b) 0
#else
static int
is_socket(int fd, const char *path)
{
struct stat sbuf;
if (fstat(fd, &sbuf) < 0)
rb_sys_fail(path);
return S_ISSOCK(sbuf.st_mode);
}
#endif
void
rb_eof_error(void)
{
rb_raise(rb_eEOFError, "end of file reached");
}
VALUE
rb_io_taint_check(VALUE io)
{
if (!OBJ_TAINTED(io) && rb_safe_level() >= 4)
rb_raise(rb_eSecurityError, "Insecure: operation on untainted IO");
rb_check_frozen(io);
return io;
}
void
rb_io_check_initialized(rb_io_t *fptr)
{
if (!fptr) {
rb_raise(rb_eIOError, "uninitialized stream");
}
}
void
rb_io_check_closed(rb_io_t *fptr)
{
rb_io_check_initialized(fptr);
if (fptr->fd < 0) {
rb_raise(rb_eIOError, "closed stream");
}
}
static int io_fflush(rb_io_t *);
VALUE
rb_io_get_io(VALUE io)
{
return rb_convert_type(io, T_FILE, "IO", "to_io");
}
static VALUE
rb_io_check_io(VALUE io)
{
return rb_check_convert_type(io, T_FILE, "IO", "to_io");
}
VALUE
rb_io_get_write_io(VALUE io)
{
VALUE write_io;
rb_io_check_initialized(RFILE(io)->fptr);
write_io = RFILE(io)->fptr->tied_io_for_writing;
if (write_io) {
return write_io;
}
return io;
}
/*
* call-seq:
* IO.try_convert(obj) -> io or nil
*
* Try to convert <i>obj</i> into an IO, using to_io method.
* Returns converted IO or nil if <i>obj</i> cannot be converted
* for any reason.
*
* IO.try_convert(STDOUT) # => STDOUT
* IO.try_convert("STDOUT") # => nil
*/
static VALUE
rb_io_s_try_convert(VALUE dummy, VALUE io)
{
return rb_io_check_io(io);
}
static void
io_unread(rb_io_t *fptr)
{
off_t r;
rb_io_check_closed(fptr);
if (fptr->rbuf_len == 0 || fptr->mode & FMODE_DUPLEX)
return;
/* xxx: target position may be negative if buffer is filled by ungetc */
#if defined(_WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(__human68k__) || defined(__EMX__)
if (!(fptr->mode & FMODE_BINMODE)) {
int len = fptr->rbuf_len;
while (fptr->rbuf_len-- > 0) {
if (fptr->rbuf[fptr->rbuf_len] == '\n')
++len;
}
r = lseek(fptr->fd, -len, SEEK_CUR);
}
else
#endif
r = lseek(fptr->fd, -fptr->rbuf_len, SEEK_CUR);
if (r < 0) {
if (errno == ESPIPE)
fptr->mode |= FMODE_DUPLEX;
return;
}
fptr->rbuf_off = 0;
fptr->rbuf_len = 0;
return;
}
static void
io_ungetc(VALUE str, rb_io_t *fptr)
{
int len = RSTRING_LEN(str);
if (fptr->rbuf == NULL) {
fptr->rbuf_off = 0;
fptr->rbuf_len = 0;
if (len > 8192)
fptr->rbuf_capa = len;
else
fptr->rbuf_capa = 8192;
fptr->rbuf = ALLOC_N(char, fptr->rbuf_capa);
}
if (fptr->rbuf_capa < len + fptr->rbuf_len) {
rb_raise(rb_eIOError, "ungetc failed");
}
if (fptr->rbuf_off < len) {
MEMMOVE(fptr->rbuf+fptr->rbuf_capa-fptr->rbuf_len,
fptr->rbuf+fptr->rbuf_off,
char, fptr->rbuf_len);
fptr->rbuf_off = fptr->rbuf_capa-fptr->rbuf_len;
}
fptr->rbuf_off-=len;
fptr->rbuf_len+=len;
MEMMOVE(fptr->rbuf+fptr->rbuf_off, RSTRING_PTR(str), char, len);
}
static rb_io_t *
flush_before_seek(rb_io_t *fptr)
{
io_fflush(fptr);
io_unread(fptr);
errno = 0;
return fptr;
}
#define io_seek(fptr, ofs, whence) lseek(flush_before_seek(fptr)->fd, ofs, whence)
#define io_tell(fptr) lseek(flush_before_seek(fptr)->fd, 0, SEEK_CUR)
#ifndef SEEK_CUR
# define SEEK_SET 0
# define SEEK_CUR 1
# define SEEK_END 2
#endif
#define FMODE_SYNCWRITE (FMODE_SYNC|FMODE_WRITABLE)
void
rb_io_check_readable(rb_io_t *fptr)
{
rb_io_check_closed(fptr);
if (!(fptr->mode & FMODE_READABLE)) {
rb_raise(rb_eIOError, "not opened for reading");
}
if (fptr->wbuf_len) {
io_fflush(fptr);
}
if (fptr->tied_io_for_writing) {
rb_io_t *wfptr;
GetOpenFile(fptr->tied_io_for_writing, wfptr);
io_fflush(wfptr);
}
if (!fptr->enc && fptr->fd == 0) {
fptr->enc = rb_default_external_encoding();
}
}
static rb_encoding*
io_read_encoding(rb_io_t *fptr)
{
if (fptr->enc) {
return fptr->enc;
}
return rb_default_external_encoding();
}
static rb_encoding*
io_input_encoding(rb_io_t *fptr)
{
if (fptr->enc2) {
return fptr->enc2;
}
return io_read_encoding(fptr);
}
void
rb_io_check_writable(rb_io_t *fptr)
{
rb_io_check_closed(fptr);
if (!(fptr->mode & FMODE_WRITABLE)) {
rb_raise(rb_eIOError, "not opened for writing");
}
if (fptr->rbuf_len) {
io_unread(fptr);
}
}
int
rb_read_pending(FILE *fp)
{
return STDIO_READ_DATA_PENDING(fp);
}
int
rb_io_read_pending(rb_io_t *fptr)
{
return READ_DATA_PENDING(fptr);
}
void
rb_read_check(FILE *fp)
{
if (!STDIO_READ_DATA_PENDING(fp)) {
rb_thread_wait_fd(fileno(fp));
}
}
void
rb_io_read_check(rb_io_t *fptr)
{
if (!READ_DATA_PENDING(fptr)) {
rb_thread_wait_fd(fptr->fd);
}
return;
}
static int
ruby_dup(int orig)
{
int fd;
fd = dup(orig);
if (fd < 0) {
if (errno == EMFILE || errno == ENFILE || errno == ENOMEM) {
rb_gc();
fd = dup(orig);
}
if (fd < 0) {
rb_sys_fail(0);
}
}
return fd;
}
static VALUE
io_alloc(VALUE klass)
{
NEWOBJ(io, struct RFile);
OBJSETUP(io, klass, T_FILE);
io->fptr = 0;
return (VALUE)io;
}
#ifndef S_ISREG
# define S_ISREG(m) ((m & S_IFMT) == S_IFREG)
#endif
static int
wsplit_p(rb_io_t *fptr)
{
#if defined(HAVE_FCNTL) && defined(F_GETFL) && defined(O_NONBLOCK)
int r;
#endif
if (!(fptr->mode & FMODE_WSPLIT_INITIALIZED)) {
struct stat buf;
if (fstat(fptr->fd, &buf) == 0 &&
!S_ISREG(buf.st_mode)
#if defined(HAVE_FCNTL) && defined(F_GETFL) && defined(O_NONBLOCK)
&& (r = fcntl(fptr->fd, F_GETFL)) != -1 &&
!(r & O_NONBLOCK)
#endif
) {
fptr->mode |= FMODE_WSPLIT;
}
fptr->mode |= FMODE_WSPLIT_INITIALIZED;
}
return fptr->mode & FMODE_WSPLIT;
}
struct io_internal_struct {
int fd;
void *buf;
size_t capa;
};
static VALUE
internal_read_func(void *ptr)
{
struct io_internal_struct *iis = (struct io_internal_struct*)ptr;
return read(iis->fd, iis->buf, iis->capa);
}
static VALUE
internal_write_func(void *ptr)
{
struct io_internal_struct *iis = (struct io_internal_struct*)ptr;
return write(iis->fd, iis->buf, iis->capa);
}
static int
rb_read_internal(int fd, void *buf, size_t count)
{
struct io_internal_struct iis;
iis.fd = fd;
iis.buf = buf;
iis.capa = count;
return rb_thread_blocking_region(internal_read_func, &iis, RB_UBF_DFL, 0);
}
static int
rb_write_internal(int fd, void *buf, size_t count)
{
struct io_internal_struct iis;
iis.fd = fd;
iis.buf = buf;
iis.capa = count;
return rb_thread_blocking_region(internal_write_func, &iis, RB_UBF_DFL, 0);
}
static int
io_fflush(rb_io_t *fptr)
{
int r, l;
int wbuf_off, wbuf_len;
rb_io_check_closed(fptr);
if (fptr->wbuf_len == 0)
return 0;
if (!rb_thread_fd_writable(fptr->fd)) {
rb_io_check_closed(fptr);
}
retry:
if (fptr->wbuf_len == 0)
return 0;
wbuf_off = fptr->wbuf_off;
wbuf_len = fptr->wbuf_len;
l = wbuf_len;
if (PIPE_BUF < l &&
!rb_thread_critical &&
!rb_thread_alone() &&
wsplit_p(fptr)) {
l = PIPE_BUF;
}
r = rb_write_internal(fptr->fd, fptr->wbuf+wbuf_off, l);
/* xxx: Other threads may modify wbuf.
* A lock is required, definitely. */
rb_io_check_closed(fptr);
if (fptr->wbuf_len <= r) {
fptr->wbuf_off = 0;
fptr->wbuf_len = 0;
return 0;
}
if (0 <= r) {
fptr->wbuf_off += r;
fptr->wbuf_len -= r;
errno = EAGAIN;
}
if (rb_io_wait_writable(fptr->fd)) {
rb_io_check_closed(fptr);
goto retry;
}
return -1;
}
#ifdef HAVE_RB_FD_INIT
static VALUE
wait_readable(VALUE p)
{
rb_fdset_t *rfds = (rb_fdset_t *)p;
return rb_thread_select(rb_fd_max(rfds), rb_fd_ptr(rfds), NULL, NULL, NULL);
}
#endif
int
rb_io_wait_readable(int f)
{
rb_fdset_t rfds;
switch (errno) {
case EINTR:
#if defined(ERESTART)
case ERESTART:
#endif
rb_thread_wait_fd(f);
return Qtrue;
case EAGAIN:
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
rb_fd_init(&rfds);
rb_fd_set(f, &rfds);
#ifdef HAVE_RB_FD_INIT
rb_ensure(wait_readable, (VALUE)&rfds,
(VALUE (*)(VALUE))rb_fd_term, (VALUE)&rfds);
#else
rb_thread_select(f + 1, &rfds, NULL, NULL, NULL);
#endif
return Qtrue;
default:
return Qfalse;
}
}
#ifdef HAVE_RB_FD_INIT
static VALUE
wait_writable(VALUE p)
{
rb_fdset_t *wfds = (rb_fdset_t *)p;
return rb_thread_select(rb_fd_max(wfds), NULL, rb_fd_ptr(wfds), NULL, NULL);
}
#endif
int
rb_io_wait_writable(int f)
{
rb_fdset_t wfds;
switch (errno) {
case EINTR:
#if defined(ERESTART)
case ERESTART:
#endif
rb_thread_fd_writable(f);
return Qtrue;
case EAGAIN:
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
rb_fd_init(&wfds);
rb_fd_set(f, &wfds);
#ifdef HAVE_RB_FD_INIT
rb_ensure(wait_writable, (VALUE)&wfds,
(VALUE (*)(VALUE))rb_fd_term, (VALUE)&wfds);
#else
rb_thread_select(f + 1, NULL, &wfds, NULL, NULL);
#endif
return Qtrue;
default:
return Qfalse;
}
}
/* writing functions */
static long
io_fwrite(VALUE str, rb_io_t *fptr)
{
long len, n, r, l, offset = 0;
/*
* If an external encoding was specified and it differs from
* the strings encoding then we must transcode before writing.
* We must also transcode if two encodings were specified
*/
if (fptr->enc) {
/* transcode str before output */
/* the methods in transcode.c are static, so call indirectly */
/* Can't use encode! because puts writes a frozen newline */
if (fptr->enc2) {
str = rb_funcall(str, id_encode, 2,
rb_enc_from_encoding(fptr->enc2),
rb_enc_from_encoding(fptr->enc));
}
else {
str = rb_funcall(str, id_encode, 1,
rb_enc_from_encoding(fptr->enc));
}
}
len = RSTRING_LEN(str);
if ((n = len) <= 0) return n;
if (fptr->wbuf == NULL && !(fptr->mode & FMODE_SYNC)) {
fptr->wbuf_off = 0;
fptr->wbuf_len = 0;
fptr->wbuf_capa = 8192;
fptr->wbuf = ALLOC_N(char, fptr->wbuf_capa);
}
if ((fptr->mode & (FMODE_SYNC|FMODE_TTY)) ||
(fptr->wbuf && fptr->wbuf_capa <= fptr->wbuf_len + len)) {
/* xxx: use writev to avoid double write if available */
if (fptr->wbuf_len && fptr->wbuf_len+len <= fptr->wbuf_capa) {
if (fptr->wbuf_capa < fptr->wbuf_off+fptr->wbuf_len+len) {
MEMMOVE(fptr->wbuf, fptr->wbuf+fptr->wbuf_off, char, fptr->wbuf_len);
fptr->wbuf_off = 0;
}
MEMMOVE(fptr->wbuf+fptr->wbuf_off+fptr->wbuf_len, RSTRING_PTR(str)+offset, char, len);
fptr->wbuf_len += len;
n = 0;
}
if (io_fflush(fptr) < 0)
return -1L;
if (n == 0)
return len;
/* avoid context switch between "a" and "\n" in STDERR.puts "a".
[ruby-dev:25080] */
if (fptr->stdio_file != stderr && !rb_thread_fd_writable(fptr->fd)) {
rb_io_check_closed(fptr);
}
retry:
l = n;
if (PIPE_BUF < l &&
!rb_thread_critical &&
!rb_thread_alone() &&
wsplit_p(fptr)) {
l = PIPE_BUF;
}
r = rb_write_internal(fptr->fd, RSTRING_PTR(str)+offset, l);
/* xxx: other threads may modify given string. */
if (r == n) return len;
if (0 <= r) {
offset += r;
n -= r;
errno = EAGAIN;
}
if (rb_io_wait_writable(fptr->fd)) {
rb_io_check_closed(fptr);
if (offset < RSTRING_LEN(str))
goto retry;
}
return -1L;
}
if (fptr->wbuf_off) {
if (fptr->wbuf_len)
MEMMOVE(fptr->wbuf, fptr->wbuf+fptr->wbuf_off, char, fptr->wbuf_len);
fptr->wbuf_off = 0;
}
MEMMOVE(fptr->wbuf+fptr->wbuf_off+fptr->wbuf_len, RSTRING_PTR(str)+offset, char, len);
fptr->wbuf_len += len;
return len;
}
long
rb_io_fwrite(const char *ptr, long len, FILE *f)
{
rb_io_t of;
of.fd = fileno(f);
of.stdio_file = f;
of.mode = FMODE_WRITABLE;
of.path = NULL;
return io_fwrite(rb_str_new(ptr, len), &of);
}
/*
* call-seq:
* ios.write(string) => integer
*
* Writes the given string to <em>ios</em>. The stream must be opened
* for writing. If the argument is not a string, it will be converted
* to a string using <code>to_s</code>. Returns the number of bytes
* written.
*
* count = $stdout.write( "This is a test\n" )
* puts "That was #{count} bytes of data"
*
* <em>produces:</em>
*
* This is a test
* That was 15 bytes of data
*/
static VALUE
io_write(VALUE io, VALUE str)
{
rb_io_t *fptr;
long n;
VALUE tmp;
rb_secure(4);
io = GetWriteIO(io);
str = rb_obj_as_string(str);
tmp = rb_io_check_io(io);
if (NIL_P(tmp)) {
/* port is not IO, call write method for it. */
return rb_funcall(io, id_write, 1, str);
}
io = tmp;
if (RSTRING_LEN(str) == 0) return INT2FIX(0);
GetOpenFile(io, fptr);
rb_io_check_writable(fptr);
n = io_fwrite(str, fptr);
if (n == -1L) rb_sys_fail(fptr->path);
return LONG2FIX(n);
}
VALUE
rb_io_write(VALUE io, VALUE str)
{
return rb_funcall(io, id_write, 1, str);
}
/*
* call-seq:
* ios << obj => ios
*
* String Output---Writes <i>obj</i> to <em>ios</em>.
* <i>obj</i> will be converted to a string using
* <code>to_s</code>.
*
* $stdout << "Hello " << "world!\n"
*
* <em>produces:</em>
*
* Hello world!
*/
VALUE
rb_io_addstr(VALUE io, VALUE str)
{
rb_io_write(io, str);
return io;
}
/*
* call-seq:
* ios.flush => ios
*
* Flushes any buffered data within <em>ios</em> to the underlying
* operating system (note that this is Ruby internal buffering only;
* the OS may buffer the data as well).
*
* $stdout.print "no newline"
* $stdout.flush
*
* <em>produces:</em>
*
* no newline
*/
VALUE
rb_io_flush(VALUE io)
{
rb_io_t *fptr;
if (TYPE(io) != T_FILE) {
return rb_funcall(io, id_flush, 0);
}
io = GetWriteIO(io);
GetOpenFile(io, fptr);
if (fptr->mode & FMODE_WRITABLE) {
io_fflush(fptr);
}
if (fptr->mode & FMODE_READABLE) {
io_unread(fptr);
}
return io;
}
/*
* call-seq:
* ios.pos => integer
* ios.tell => integer
*
* Returns the current offset (in bytes) of <em>ios</em>.
*
* f = File.new("testfile")
* f.pos #=> 0
* f.gets #=> "This is line one\n"
* f.pos #=> 17
*/
static VALUE
rb_io_tell(VALUE io)
{
rb_io_t *fptr;
off_t pos;
GetOpenFile(io, fptr);
pos = io_tell(fptr);
if (pos < 0 && errno) rb_sys_fail(fptr->path);
return OFFT2NUM(pos);
}
static VALUE
rb_io_seek(VALUE io, VALUE offset, int whence)
{
rb_io_t *fptr;
off_t pos;
pos = NUM2OFFT(offset);
GetOpenFile(io, fptr);
pos = io_seek(fptr, pos, whence);
if (pos < 0 && errno) rb_sys_fail(fptr->path);
return INT2FIX(0);
}
/*
* call-seq:
* ios.seek(amount, whence=SEEK_SET) -> 0
*
* Seeks to a given offset <i>anInteger</i> in the stream according to
* the value of <i>whence</i>:
*
* IO::SEEK_CUR | Seeks to _amount_ plus current position
* --------------+----------------------------------------------------
* IO::SEEK_END | Seeks to _amount_ plus end of stream (you probably
* | want a negative value for _amount_)
* --------------+----------------------------------------------------
* IO::SEEK_SET | Seeks to the absolute location given by _amount_
*
* Example:
*
* f = File.new("testfile")
* f.seek(-13, IO::SEEK_END) #=> 0
* f.readline #=> "And so on...\n"
*/
static VALUE
rb_io_seek_m(int argc, VALUE *argv, VALUE io)
{
VALUE offset, ptrname;
int whence = SEEK_SET;
if (rb_scan_args(argc, argv, "11", &offset, &ptrname) == 2) {
whence = NUM2INT(ptrname);
}
return rb_io_seek(io, offset, whence);
}
/*
* call-seq:
* ios.pos = integer => integer
*
* Seeks to the given position (in bytes) in <em>ios</em>.
*
* f = File.new("testfile")
* f.pos = 17
* f.gets #=> "This is line two\n"
*/
static VALUE
rb_io_set_pos(VALUE io, VALUE offset)
{
rb_io_t *fptr;
off_t pos;
pos = NUM2OFFT(offset);
GetOpenFile(io, fptr);
pos = io_seek(fptr, pos, SEEK_SET);
if (pos < 0) rb_sys_fail(fptr->path);
return OFFT2NUM(pos);
}
/*
* call-seq:
* ios.rewind => 0
*
* Positions <em>ios</em> to the beginning of input, resetting
* <code>lineno</code> to zero.
*
* f = File.new("testfile")
* f.readline #=> "This is line one\n"
* f.rewind #=> 0
* f.lineno #=> 0
* f.readline #=> "This is line one\n"
*/
static VALUE
rb_io_rewind(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (io_seek(fptr, 0L, 0) < 0) rb_sys_fail(fptr->path);
if (io == ARGF.current_file) {
ARGF.gets_lineno -= fptr->lineno;
}
fptr->lineno = 0;
return INT2FIX(0);
}
static int
io_fillbuf(rb_io_t *fptr)
{
int r;
if (fptr->rbuf == NULL) {
fptr->rbuf_off = 0;
fptr->rbuf_len = 0;
fptr->rbuf_capa = 8192;
fptr->rbuf = ALLOC_N(char, fptr->rbuf_capa);
}
if (fptr->rbuf_len == 0) {
retry:
{
r = rb_read_internal(fptr->fd, fptr->rbuf, fptr->rbuf_capa);
}
if (r < 0) {
if (rb_io_wait_readable(fptr->fd))
goto retry;
rb_sys_fail(fptr->path);
}
fptr->rbuf_off = 0;
fptr->rbuf_len = r;
if (r == 0)
return -1; /* EOF */
}
return 0;
}
/*
* call-seq:
* ios.eof => true or false
* ios.eof? => true or false
*
* Returns true if <em>ios</em> is at end of file that means
* there are no more data to read.
* The stream must be opened for reading or an <code>IOError</code> will be
* raised.
*
* f = File.new("testfile")
* dummy = f.readlines
* f.eof #=> true
*
* If <em>ios</em> is a stream such as pipe or socket, <code>IO#eof?</code>
* blocks until the other end sends some data or closes it.
*
* r, w = IO.pipe
* Thread.new { sleep 1; w.close }
* r.eof? #=> true after 1 second blocking
*
* r, w = IO.pipe
* Thread.new { sleep 1; w.puts "a" }
* r.eof? #=> false after 1 second blocking
*
* r, w = IO.pipe
* r.eof? # blocks forever
*
* Note that <code>IO#eof?</code> reads data to a input buffer.
* So <code>IO#sysread</code> doesn't work with <code>IO#eof?</code>.
*/
VALUE
rb_io_eof(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
if (READ_DATA_PENDING(fptr)) return Qfalse;
READ_CHECK(fptr);
if (io_fillbuf(fptr) < 0) {
return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* ios.sync => true or false
*
* Returns the current ``sync mode'' of <em>ios</em>. When sync mode is
* true, all output is immediately flushed to the underlying operating
* system and is not buffered by Ruby internally. See also
* <code>IO#fsync</code>.
*
* f = File.new("testfile")
* f.sync #=> false
*/
static VALUE
rb_io_sync(VALUE io)
{
rb_io_t *fptr;
io = GetWriteIO(io);
GetOpenFile(io, fptr);
return (fptr->mode & FMODE_SYNC) ? Qtrue : Qfalse;
}
/*
* call-seq:
* ios.sync = boolean => boolean
*
* Sets the ``sync mode'' to <code>true</code> or <code>false</code>.
* When sync mode is true, all output is immediately flushed to the
* underlying operating system and is not buffered internally. Returns
* the new state. See also <code>IO#fsync</code>.
*
* f = File.new("testfile")
* f.sync = true
*
* <em>(produces no output)</em>
*/
static VALUE
rb_io_set_sync(VALUE io, VALUE mode)
{
rb_io_t *fptr;
io = GetWriteIO(io);
GetOpenFile(io, fptr);
if (RTEST(mode)) {
fptr->mode |= FMODE_SYNC;
}
else {
fptr->mode &= ~FMODE_SYNC;
}
return mode;
}
/*
* call-seq:
* ios.fsync => 0 or nil
*
* Immediately writes all buffered data in <em>ios</em> to disk.
* Returns <code>nil</code> if the underlying operating system does not
* support <em>fsync(2)</em>. Note that <code>fsync</code> differs from
* using <code>IO#sync=</code>. The latter ensures that data is flushed
* from Ruby's buffers, but doesn't not guarantee that the underlying
* operating system actually writes it to disk.
*/
static VALUE
rb_io_fsync(VALUE io)
{
#ifdef HAVE_FSYNC
rb_io_t *fptr;
io = GetWriteIO(io);
GetOpenFile(io, fptr);
io_fflush(fptr);
if (fsync(fptr->fd) < 0)
rb_sys_fail(fptr->path);
return INT2FIX(0);
#else
rb_notimplement();
return Qnil; /* not reached */
#endif
}
/*
* call-seq:
* ios.fileno => fixnum
* ios.to_i => fixnum
*
* Returns an integer representing the numeric file descriptor for
* <em>ios</em>.
*
* $stdin.fileno #=> 0
* $stdout.fileno #=> 1
*/
static VALUE
rb_io_fileno(VALUE io)
{
rb_io_t *fptr;
int fd;
GetOpenFile(io, fptr);
fd = fptr->fd;
return INT2FIX(fd);
}
/*
* call-seq:
* ios.pid => fixnum
*
* Returns the process ID of a child process associated with
* <em>ios</em>. This will be set by <code>IO::popen</code>.
*
* pipe = IO.popen("-")
* if pipe
* $stderr.puts "In parent, child pid is #{pipe.pid}"
* else
* $stderr.puts "In child, pid is #{$$}"
* end
*
* <em>produces:</em>
*
* In child, pid is 26209
* In parent, child pid is 26209
*/
static VALUE
rb_io_pid(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (!fptr->pid)
return Qnil;
return INT2FIX(fptr->pid);
}
/*
* call-seq:
* ios.inspect => string
*
* Return a string describing this IO object.
*/
static VALUE
rb_io_inspect(VALUE obj)
{
rb_io_t *fptr;
const char *cname;
const char *st = "";
fptr = RFILE(rb_io_taint_check(obj))->fptr;
if (!fptr || !fptr->path) return rb_any_to_s(obj);
cname = rb_obj_classname(obj);
if (fptr->fd < 0) {
st = " (closed)";
}
return rb_sprintf("#<%s:%s%s>", cname, fptr->path, st);
}
/*
* call-seq:
* ios.to_io -> ios
*
* Returns <em>ios</em>.
*/
static VALUE
rb_io_to_io(VALUE io)
{
return io;
}
/* reading functions */
static long
read_buffered_data(char *ptr, long len, rb_io_t *fptr)
{
long n;
n = READ_DATA_PENDING_COUNT(fptr);
if (n <= 0) return 0;
if (n > len) n = len;
MEMMOVE(ptr, fptr->rbuf+fptr->rbuf_off, char, n);
fptr->rbuf_off += n;
fptr->rbuf_len -= n;
return n;
}
static long
io_fread(VALUE str, long offset, rb_io_t *fptr)
{
long len = RSTRING_LEN(str) - offset;
long n = len;
int c;
if (READ_DATA_PENDING(fptr) == 0) {
while (n > 0) {
c = rb_read_internal(fptr->fd, RSTRING_PTR(str)+offset, n);
if (c == 0) break;
if (c < 0) {
rb_sys_fail(fptr->path);
}
offset += c;
if ((n -= c) <= 0) break;
rb_thread_wait_fd(fptr->fd);
}
return len - n;
}
while (n > 0) {
c = read_buffered_data(RSTRING_PTR(str)+offset, n, fptr);
if (c > 0) {
offset += c;
if ((n -= c) <= 0) break;
}
rb_thread_wait_fd(fptr->fd);
rb_io_check_closed(fptr);
if (io_fillbuf(fptr) < 0) {
break;
}
}
return len - n;
}
long
rb_io_fread(char *ptr, long len, FILE *f)
{
rb_io_t of;
VALUE str;
long n;
of.fd = fileno(f);
of.stdio_file = f;
of.mode = FMODE_READABLE;
str = rb_str_new(ptr, len);
n = io_fread(str, 0, &of);
MEMCPY(ptr, RSTRING_PTR(str), char, n);
return n;
}
#define SMALLBUF 100
static long
remain_size(rb_io_t *fptr)
{
struct stat st;
off_t siz = READ_DATA_PENDING_COUNT(fptr);
off_t pos;
if (fstat(fptr->fd, &st) == 0 && S_ISREG(st.st_mode)
#ifdef __BEOS__
&& (st.st_dev > 3)
#endif
)
{
io_fflush(fptr);
pos = lseek(fptr->fd, 0, SEEK_CUR);
if (st.st_size >= pos && pos >= 0) {
siz += st.st_size - pos;
if (siz > LONG_MAX) {
rb_raise(rb_eIOError, "file too big for single read");
}
}
}
else {
siz += BUFSIZ;
}
return (long)siz;
}
static VALUE
io_enc_str(VALUE str, rb_io_t *fptr)
{
OBJ_TAINT(str);
if (fptr->enc2) {
/* two encodings, so transcode from enc2 to enc */
/* the methods in transcode.c are static, so call indirectly */
str = rb_funcall(str, id_encode, 2,
rb_enc_from_encoding(fptr->enc),
rb_enc_from_encoding(fptr->enc2));
}
else {
/* just one encoding, so associate it with the string */
rb_enc_associate(str, io_read_encoding(fptr));
}
return str;
}
static VALUE
read_all(rb_io_t *fptr, long siz, VALUE str)
{
long bytes = 0;
long n;
long pos = 0;
rb_encoding *enc = io_read_encoding(fptr);
int cr = fptr->enc2 ? ENC_CODERANGE_BROKEN : 0;
if (siz == 0) siz = BUFSIZ;
if (NIL_P(str)) {
str = rb_str_new(0, siz);
}
else {
rb_str_resize(str, siz);
}
for (;;) {
READ_CHECK(fptr);
n = io_fread(str, bytes, fptr);
if (n == 0 && bytes == 0) {
break;
}
bytes += n;
if (cr != ENC_CODERANGE_BROKEN)
pos = rb_str_coderange_scan_restartable(RSTRING_PTR(str) + pos, RSTRING_PTR(str) + bytes, enc, &cr);
if (bytes < siz) break;
siz += BUFSIZ;
rb_str_resize(str, siz);
}
if (bytes != siz) rb_str_resize(str, bytes);
str = io_enc_str(str, fptr);
if (!fptr->enc2) {
ENC_CODERANGE_SET(str, cr);
}
return str;
}
void
rb_io_set_nonblock(rb_io_t *fptr)
{
int flags;
#ifdef F_GETFL
flags = fcntl(fptr->fd, F_GETFL);
if (flags == -1) {
rb_sys_fail(fptr->path);
}
#else
flags = 0;
#endif
if ((flags & O_NONBLOCK) == 0) {
flags |= O_NONBLOCK;
if (fcntl(fptr->fd, F_SETFL, flags) == -1) {
rb_sys_fail(fptr->path);
}
}
}
static VALUE
io_getpartial(int argc, VALUE *argv, VALUE io, int nonblock)
{
rb_io_t *fptr;
VALUE length, str;
long n, len;
rb_scan_args(argc, argv, "11", &length, &str);
if ((len = NUM2LONG(length)) < 0) {
rb_raise(rb_eArgError, "negative length %ld given", len);
}
if (NIL_P(str)) {
str = rb_str_new(0, len);
}
else {
StringValue(str);
rb_str_modify(str);
rb_str_resize(str, len);
}
OBJ_TAINT(str);
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
if (len == 0)
return str;
if (!nonblock)
READ_CHECK(fptr);
if (RSTRING_LEN(str) != len) {
modified:
rb_raise(rb_eRuntimeError, "buffer string modified");
}
n = read_buffered_data(RSTRING_PTR(str), len, fptr);
if (n <= 0) {
again:
if (RSTRING_LEN(str) != len) goto modified;
if (nonblock) {
rb_io_set_nonblock(fptr);
n = rb_read_internal(fptr->fd, RSTRING_PTR(str), len);
}
else {
n = rb_read_internal(fptr->fd, RSTRING_PTR(str), len);
}
if (n < 0) {
if (!nonblock && rb_io_wait_readable(fptr->fd))
goto again;
rb_sys_fail(fptr->path);
}
}
rb_str_resize(str, n);
if (n == 0)
return Qnil;
else
return str;
}
/*
* call-seq:
* ios.readpartial(maxlen) => string
* ios.readpartial(maxlen, outbuf) => outbuf
*
* Reads at most <i>maxlen</i> bytes from the I/O stream.
* It blocks only if <em>ios</em> has no data immediately available.
* It doesn't block if some data available.
* If the optional <i>outbuf</i> argument is present,
* it must reference a String, which will receive the data.
* It raises <code>EOFError</code> on end of file.
*
* readpartial is designed for streams such as pipe, socket, tty, etc.
* It blocks only when no data immediately available.
* This means that it blocks only when following all conditions hold.
* * the buffer in the IO object is empty.
* * the content of the stream is empty.
* * the stream is not reached to EOF.
*
* When readpartial blocks, it waits data or EOF on the stream.
* If some data is reached, readpartial returns with the data.
* If EOF is reached, readpartial raises EOFError.
*
* When readpartial doesn't blocks, it returns or raises immediately.
* If the buffer is not empty, it returns the data in the buffer.
* Otherwise if the stream has some content,
* it returns the data in the stream.
* Otherwise if the stream is reached to EOF, it raises EOFError.
*
* r, w = IO.pipe # buffer pipe content
* w << "abc" # "" "abc".
* r.readpartial(4096) #=> "abc" "" ""
* r.readpartial(4096) # blocks because buffer and pipe is empty.
*
* r, w = IO.pipe # buffer pipe content
* w << "abc" # "" "abc"
* w.close # "" "abc" EOF
* r.readpartial(4096) #=> "abc" "" EOF
* r.readpartial(4096) # raises EOFError
*
* r, w = IO.pipe # buffer pipe content
* w << "abc\ndef\n" # "" "abc\ndef\n"
* r.gets #=> "abc\n" "def\n" ""
* w << "ghi\n" # "def\n" "ghi\n"
* r.readpartial(4096) #=> "def\n" "" "ghi\n"
* r.readpartial(4096) #=> "ghi\n" "" ""
*
* Note that readpartial behaves similar to sysread.
* The differences are:
* * If the buffer is not empty, read from the buffer instead of "sysread for buffered IO (IOError)".
* * It doesn't cause Errno::EAGAIN and Errno::EINTR. When readpartial meets EAGAIN and EINTR by read system call, readpartial retry the system call.
*
* The later means that readpartial is nonblocking-flag insensitive.
* It blocks on the situation IO#sysread causes Errno::EAGAIN as if the fd is blocking mode.
*
*/
static VALUE
io_readpartial(int argc, VALUE *argv, VALUE io)
{
VALUE ret;
ret = io_getpartial(argc, argv, io, 0);
if (NIL_P(ret))
rb_eof_error();
else
return ret;
}
/*
* call-seq:
* ios.read_nonblock(maxlen) => string
* ios.read_nonblock(maxlen, outbuf) => outbuf
*
* Reads at most <i>maxlen</i> bytes from <em>ios</em> using
* read(2) system call after O_NONBLOCK is set for
* the underlying file descriptor.
*
* If the optional <i>outbuf</i> argument is present,
* it must reference a String, which will receive the data.
*
* read_nonblock just calls read(2).
* It causes all errors read(2) causes: EAGAIN, EINTR, etc.
* The caller should care such errors.
*
* read_nonblock causes EOFError on EOF.
*
* If the read buffer is not empty,
* read_nonblock reads from the buffer like readpartial.
* In this case, read(2) is not called.
*
*/
static VALUE
io_read_nonblock(int argc, VALUE *argv, VALUE io)
{
VALUE ret;
ret = io_getpartial(argc, argv, io, 1);
if (NIL_P(ret))
rb_eof_error();
else
return ret;
}
/*
* call-seq:
* ios.write_nonblock(string) => integer
*
* Writes the given string to <em>ios</em> using
* write(2) system call after O_NONBLOCK is set for
* the underlying file descriptor.
*
* write_nonblock just calls write(2).
* It causes all errors write(2) causes: EAGAIN, EINTR, etc.
* The result may also be smaller than string.length (partial write).
* The caller should care such errors and partial write.
*
* If the write buffer is not empty, it is flushed at first.
*
*/
static VALUE
rb_io_write_nonblock(VALUE io, VALUE str)
{
rb_io_t *fptr;
long n;
rb_secure(4);
if (TYPE(str) != T_STRING)
str = rb_obj_as_string(str);
io = GetWriteIO(io);
GetOpenFile(io, fptr);
rb_io_check_writable(fptr);
io_fflush(fptr);
rb_io_set_nonblock(fptr);
n = write(fptr->fd, RSTRING_PTR(str), RSTRING_LEN(str));
if (n == -1) rb_sys_fail(fptr->path);
return LONG2FIX(n);
}
/*
* call-seq:
* ios.read([length [, buffer]]) => string, buffer, or nil
*
* Reads at most <i>length</i> bytes from the I/O stream, or to the
* end of file if <i>length</i> is omitted or is <code>nil</code>.
* <i>length</i> must be a non-negative integer or nil.
* If the optional <i>buffer</i> argument is present, it must reference
* a String, which will receive the data.
*
* At end of file, it returns <code>nil</code> or <code>""</code>
* depend on <i>length</i>.
* <code><i>ios</i>.read()</code> and
* <code><i>ios</i>.read(nil)</code> returns <code>""</code>.
* <code><i>ios</i>.read(<i>positive-integer</i>)</code> returns nil.
*
* <code><i>ios</i>.read(0)</code> returns <code>""</code>.
*
* f = File.new("testfile")
* f.read(16) #=> "This is line one"
*/
static VALUE
io_read(int argc, VALUE *argv, VALUE io)
{
rb_io_t *fptr;
long n, len;
VALUE length, str;
rb_scan_args(argc, argv, "02", &length, &str);
if (NIL_P(length)) {
if (!NIL_P(str)) StringValue(str);
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
return read_all(fptr, remain_size(fptr), str);
}
len = NUM2LONG(length);
if (len < 0) {
rb_raise(rb_eArgError, "negative length %ld given", len);
}
if (NIL_P(str)) {
str = rb_str_new(0, len);
}
else {
StringValue(str);
rb_str_modify(str);
rb_str_resize(str,len);
}
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
if (len == 0) return str;
READ_CHECK(fptr);
if (RSTRING_LEN(str) != len) {
rb_raise(rb_eRuntimeError, "buffer string modified");
}
n = io_fread(str, 0, fptr);
if (n == 0) {
if (fptr->fd < 0) return Qnil;
rb_str_resize(str, 0);
return Qnil;
}
rb_str_resize(str, n);
return str;
}
static void
rscheck(const char *rsptr, long rslen, VALUE rs)
{
if (!rs) return;
if (RSTRING_PTR(rs) != rsptr && RSTRING_LEN(rs) != rslen)
rb_raise(rb_eRuntimeError, "rs modified");
}
static int
appendline(rb_io_t *fptr, int delim, VALUE *strp, long *lp)
{
VALUE str = *strp;
int c = EOF;
long limit = *lp;
do {
long pending = READ_DATA_PENDING_COUNT(fptr);
if (pending > 0) {
const char *p = READ_DATA_PENDING_PTR(fptr);
const char *e;
long last = 0, len = (c != EOF);
rb_encoding *enc = io_read_encoding(fptr);
if (limit > 0 && pending > limit) pending = limit;
e = memchr(p, delim, pending);
if (e) pending = e - p + 1;
len += pending;
if (!NIL_P(str)) {
last = RSTRING_LEN(str);
rb_str_resize(str, last + len);
}
else {
*strp = str = rb_str_buf_new(len);
rb_str_set_len(str, len);
}
if (c != EOF) {
RSTRING_PTR(str)[last++] = c;
}
if (limit > 0 && limit == pending) {
char *p = fptr->rbuf+fptr->rbuf_off;
char *pp = p + limit;
char *pl = rb_enc_left_char_head(p, pp, enc);
if (pl < pp) {
int diff = pp - pl;
pending -= diff;
limit = pending;
rb_str_set_len(str, RSTRING_LEN(str)-diff);
}
}
read_buffered_data(RSTRING_PTR(str) + last, pending, fptr); /* must not fail */
limit -= pending;
*lp = limit;
if (limit == 0) return RSTRING_PTR(str)[RSTRING_LEN(str)-1];
if (e) return delim;
}
else if (c != EOF) {
if (!NIL_P(str)) {
char ch = c;
rb_str_buf_cat(str, &ch, 1);
}
else {
*strp = str = rb_str_buf_new(1);
rb_str_resize(str, 1);
RSTRING_PTR(str)[0] = c;
}
}
rb_thread_wait_fd(fptr->fd);
rb_io_check_closed(fptr);
if (io_fillbuf(fptr) < 0) {
*lp = limit;
return c;
}
} while (c != delim);
{
char ch = c;
if (!NIL_P(str)) {
rb_str_cat(str, &ch, 1);
}
else {
*strp = str = rb_str_new(&ch, 1);
}
}
return c;
}
static inline int
swallow(rb_io_t *fptr, int term)
{
do {
long cnt;
while ((cnt = READ_DATA_PENDING_COUNT(fptr)) > 0) {
char buf[1024];
const char *p = READ_DATA_PENDING_PTR(fptr);
int i;
if (cnt > sizeof buf) cnt = sizeof buf;
if (*p != term) return Qtrue;
i = cnt;
while (--i && *++p == term);
if (!read_buffered_data(buf, cnt - i, fptr)) /* must not fail */
rb_sys_fail(fptr->path);
}
rb_thread_wait_fd(fptr->fd);
rb_io_check_closed(fptr);
} while (io_fillbuf(fptr) == 0);
return Qfalse;
}
static VALUE
rb_io_getline_fast(rb_io_t *fptr, rb_encoding *enc)
{
VALUE str = Qnil;
int len = 0;
long pos = 0;
int cr = fptr->enc2 ? ENC_CODERANGE_BROKEN : 0;
for (;;) {
long pending = READ_DATA_PENDING_COUNT(fptr);
if (pending > 0) {
const char *p = READ_DATA_PENDING_PTR(fptr);
const char *e;
e = memchr(p, '\n', pending);
if (e) {
pending = e - p + 1;
}
if (NIL_P(str)) {
str = rb_str_new(p, pending);
fptr->rbuf_off += pending;
fptr->rbuf_len -= pending;
}
else {
rb_str_resize(str, len + pending);
read_buffered_data(RSTRING_PTR(str)+len, pending, fptr);
}
len += pending;
if (cr != ENC_CODERANGE_BROKEN)
pos = rb_str_coderange_scan_restartable(RSTRING_PTR(str) + pos, RSTRING_PTR(str) + len, enc, &cr);
if (e) break;
}
rb_thread_wait_fd(fptr->fd);
rb_io_check_closed(fptr);
if (io_fillbuf(fptr) < 0) {
if (NIL_P(str)) return Qnil;
break;
}
}
str = io_enc_str(str, fptr);
if (!fptr->enc2) ENC_CODERANGE_SET(str, cr);
fptr->lineno++;
ARGF.lineno = INT2FIX(fptr->lineno);
return str;
}
static void
prepare_getline_args(int argc, VALUE *argv, VALUE *rsp, long *limit, VALUE io)
{
VALUE lim, rs;
rb_io_t *fptr;
if (argc == 0) {
rs = rb_rs;
lim = Qnil;
}
else {
rb_scan_args(argc, argv, "11", &rs, &lim);
if (NIL_P(lim) && !NIL_P(rs) && TYPE(rs) != T_STRING) {
VALUE tmp = rb_check_string_type(rs);
if (NIL_P(tmp)) {
lim = rs;
rs = rb_rs;
}
else {
rs = tmp;
}
}
}
if (!NIL_P(rs)) {
rb_encoding *enc_rs, *enc_io;
GetOpenFile(io, fptr);
enc_rs = rb_enc_get(rs);
enc_io = io_read_encoding(fptr);
if (enc_io != enc_rs &&
(rb_enc_str_coderange(rs) != ENC_CODERANGE_7BIT ||
!rb_enc_asciicompat(enc_io))) {
if (rs == rb_default_rs) {
rs = rb_enc_str_new(0, 0, enc_io);
rb_str_buf_cat_ascii(rs, "\n");
}
else {
rb_raise(rb_eArgError, "encoding mismatch: %s IO with %s RS",
rb_enc_name(enc_io),
rb_enc_name(enc_rs));
}
}
if (fptr->enc2) {
VALUE rs2;
rs2 = rb_funcall(rs, id_encode, 2,
rb_enc_from_encoding(fptr->enc2),
rb_enc_from_encoding(fptr->enc));
if (!RTEST(rb_str_equal(rs, rs2))) {
rs = rs2;
}
}
}
*rsp = rs;
*limit = NIL_P(lim) ? -1L : NUM2LONG(lim);
}
static VALUE
rb_io_getline_1(VALUE rs, long limit, VALUE io)
{
VALUE str = Qnil;
rb_io_t *fptr;
int nolimit = 0;
rb_encoding *enc;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
if (NIL_P(rs)) {
str = read_all(fptr, 0, Qnil);
if (RSTRING_LEN(str) == 0) return Qnil;
}
else if (limit == 0) {
return rb_enc_str_new(0, 0, io_read_encoding(fptr));
}
else if (rs == rb_default_rs && limit < 0 &&
rb_enc_asciicompat(enc = io_read_encoding(fptr))) {
return rb_io_getline_fast(fptr, enc);
}
else {
int c, newline;
const char *rsptr;
long rslen;
int rspara = 0;
rslen = RSTRING_LEN(rs);
if (rslen == 0) {
rsptr = "\n\n";
rslen = 2;
rspara = 1;
swallow(fptr, '\n');
rs = 0;
}
else {
rsptr = RSTRING_PTR(rs);
}
newline = rsptr[rslen - 1];
enc = io_input_encoding(fptr);
while ((c = appendline(fptr, newline, &str, &limit)) != EOF) {
if (c == newline) {
const char *s, *p, *pp;
if (RSTRING_LEN(str) < rslen) continue;
s = RSTRING_PTR(str);
p = s + RSTRING_LEN(str) - rslen;
pp = rb_enc_left_char_head(s, p, enc);
if (pp != p) continue;
if (!rspara) rscheck(rsptr, rslen, rs);
if (memcmp(p, rsptr, rslen) == 0) break;
}
if (limit == 0) {
nolimit = 1;
break;
}
}
if (rspara) {
if (c != EOF) {
swallow(fptr, '\n');
}
}
if (!NIL_P(str)) str = io_enc_str(str, fptr);
}
if (!NIL_P(str)) {
if (!nolimit) {
fptr->lineno++;
ARGF.lineno = INT2FIX(fptr->lineno);
}
}
return str;
}
static VALUE
rb_io_getline(int argc, VALUE *argv, VALUE io)
{
VALUE rs;
long limit;
prepare_getline_args(argc, argv, &rs, &limit, io);
return rb_io_getline_1(rs, limit, io);
}
VALUE
rb_io_gets(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
return rb_io_getline_fast(fptr, io_read_encoding(fptr));
}
/*
* call-seq:
* ios.gets(sep=$/) => string or nil
* ios.gets(limit) => string or nil
* ios.gets(sep, limit) => string or nil
*
* Reads the next ``line'' from the I/O stream; lines are separated by
* <i>sep</i>. A separator of <code>nil</code> reads the entire
* contents, and a zero-length separator reads the input a paragraph at
* a time (two successive newlines in the input separate paragraphs).
* The stream must be opened for reading or an <code>IOError</code>
* will be raised. The line read in will be returned and also assigned
* to <code>$_</code>. Returns <code>nil</code> if called at end of
* file. If the first argument is an integer, or optional second
* argument is given, the returning string would not be longer than the
* given value.
*
* File.new("testfile").gets #=> "This is line one\n"
* $_ #=> "This is line one\n"
*/
static VALUE
rb_io_gets_m(int argc, VALUE *argv, VALUE io)
{
VALUE str;
str = rb_io_getline(argc, argv, io);
rb_lastline_set(str);
return str;
}
/*
* call-seq:
* ios.lineno => integer
*
* Returns the current line number in <em>ios</em>. The stream must be
* opened for reading. <code>lineno</code> counts the number of times
* <code>gets</code> is called, rather than the number of newlines
* encountered. The two values will differ if <code>gets</code> is
* called with a separator other than newline. See also the
* <code>$.</code> variable.
*
* f = File.new("testfile")
* f.lineno #=> 0
* f.gets #=> "This is line one\n"
* f.lineno #=> 1
* f.gets #=> "This is line two\n"
* f.lineno #=> 2
*/
static VALUE
rb_io_lineno(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
return INT2NUM(fptr->lineno);
}
/*
* call-seq:
* ios.lineno = integer => integer
*
* Manually sets the current line number to the given value.
* <code>$.</code> is updated only on the next read.
*
* f = File.new("testfile")
* f.gets #=> "This is line one\n"
* $. #=> 1
* f.lineno = 1000
* f.lineno #=> 1000
* $. #=> 1 # lineno of last read
* f.gets #=> "This is line two\n"
* $. #=> 1001 # lineno of last read
*/
static VALUE
rb_io_set_lineno(VALUE io, VALUE lineno)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
fptr->lineno = NUM2INT(lineno);
return lineno;
}
/*
* call-seq:
* ios.readline(sep=$/) => string
* ios.readline(limit) => string
* ios.readline(sep, limit) => string
*
* Reads a line as with <code>IO#gets</code>, but raises an
* <code>EOFError</code> on end of file.
*/
static VALUE
rb_io_readline(int argc, VALUE *argv, VALUE io)
{
VALUE line = rb_io_gets_m(argc, argv, io);
if (NIL_P(line)) {
rb_eof_error();
}
return line;
}
/*
* call-seq:
* ios.readlines(sep=$/) => array
* ios.readlines(limit) => array
* ios.readlines(sep, limit) => array
*
* Reads all of the lines in <em>ios</em>, and returns them in
* <i>anArray</i>. Lines are separated by the optional <i>sep</i>. If
* <i>sep</i> is <code>nil</code>, the rest of the stream is returned
* as a single record. If the first argument is an integer, or
* optional second argument is given, the returning string would not be
* longer than the given value. The stream must be opened for reading
* or an <code>IOError</code> will be raised.
*
* f = File.new("testfile")
* f.readlines[0] #=> "This is line one\n"
*/
static VALUE
rb_io_readlines(int argc, VALUE *argv, VALUE io)
{
VALUE line, ary, rs;
long limit;
prepare_getline_args(argc, argv, &rs, &limit, io);
ary = rb_ary_new();
while (!NIL_P(line = rb_io_getline_1(rs, limit, io))) {
rb_ary_push(ary, line);
}
return ary;
}
/*
* call-seq:
* ios.each(sep=$/) {|line| block } => ios
* ios.each(limit) {|line| block } => ios
* ios.each(sep,limit) {|line| block } => ios
* ios.each_line(sep=$/) {|line| block } => ios
* ios.each_line(limit) {|line| block } => ios
* ios.each_line(sep,limit) {|line| block } => ios
*
* Executes the block for every line in <em>ios</em>, where lines are
* separated by <i>sep</i>. <em>ios</em> must be opened for
* reading or an <code>IOError</code> will be raised.
*
* f = File.new("testfile")
* f.each {|line| puts "#{f.lineno}: #{line}" }
*
* <em>produces:</em>
*
* 1: This is line one
* 2: This is line two
* 3: This is line three
* 4: And so on...
*/
static VALUE
rb_io_each_line(int argc, VALUE *argv, VALUE io)
{
VALUE str, rs;
long limit;
RETURN_ENUMERATOR(io, argc, argv);
prepare_getline_args(argc, argv, &rs, &limit, io);
while (!NIL_P(str = rb_io_getline_1(rs, limit, io))) {
rb_yield(str);
}
return io;
}
/*
* call-seq:
* ios.each_byte {|byte| block } => ios
*
* Calls the given block once for each byte (0..255) in <em>ios</em>,
* passing the byte as an argument. The stream must be opened for
* reading or an <code>IOError</code> will be raised.
*
* f = File.new("testfile")
* checksum = 0
* f.each_byte {|x| checksum ^= x } #=> #<File:testfile>
* checksum #=> 12
*/
static VALUE
rb_io_each_byte(VALUE io)
{
rb_io_t *fptr;
char *p, *e;
RETURN_ENUMERATOR(io, 0, 0);
GetOpenFile(io, fptr);
for (;;) {
p = fptr->rbuf+fptr->rbuf_off;
e = p + fptr->rbuf_len;
while (p < e) {
fptr->rbuf_off++;
fptr->rbuf_len--;
rb_yield(INT2FIX(*p & 0xff));
p++;
errno = 0;
}
rb_io_check_readable(fptr);
READ_CHECK(fptr);
if (io_fillbuf(fptr) < 0) {
break;
}
}
return io;
}
static VALUE
io_getc(rb_io_t *fptr, rb_encoding *enc)
{
int r, n, cr = 0;
VALUE str;
if (io_fillbuf(fptr) < 0) {
return Qnil;
}
if (rb_enc_asciicompat(enc) && ISASCII(fptr->rbuf[fptr->rbuf_off])) {
str = rb_str_new(fptr->rbuf+fptr->rbuf_off, 1);
fptr->rbuf_off += 1;
fptr->rbuf_len -= 1;
cr = ENC_CODERANGE_7BIT;
}
else {
r = rb_enc_precise_mbclen(fptr->rbuf+fptr->rbuf_off, fptr->rbuf+fptr->rbuf_off+fptr->rbuf_len, enc);
if (MBCLEN_CHARFOUND_P(r) &&
(n = MBCLEN_CHARFOUND_LEN(r)) <= fptr->rbuf_len) {
str = rb_str_new(fptr->rbuf+fptr->rbuf_off, n);
fptr->rbuf_off += n;
fptr->rbuf_len -= n;
cr = ENC_CODERANGE_VALID;
}
else if (MBCLEN_NEEDMORE_P(r)) {
str = rb_str_new(fptr->rbuf+fptr->rbuf_off, fptr->rbuf_len);
fptr->rbuf_len = 0;
getc_needmore:
if (io_fillbuf(fptr) != -1) {
rb_str_cat(str, fptr->rbuf+fptr->rbuf_off, 1);
fptr->rbuf_off++;
fptr->rbuf_len--;
r = rb_enc_precise_mbclen(RSTRING_PTR(str), RSTRING_PTR(str)+RSTRING_LEN(str), enc);
if (MBCLEN_NEEDMORE_P(r)) {
goto getc_needmore;
}
else if (MBCLEN_CHARFOUND_P(r)) {
cr = ENC_CODERANGE_VALID;
}
}
}
else {
str = rb_str_new(fptr->rbuf+fptr->rbuf_off, 1);
fptr->rbuf_off++;
fptr->rbuf_len--;
}
}
if (!cr) cr = ENC_CODERANGE_BROKEN;
str = io_enc_str(str, fptr);
if (!fptr->enc2) {
ENC_CODERANGE_SET(str, cr);
}
return str;
}
/*
* call-seq:
* ios.each_char {|c| block } => ios
*
* Calls the given block once for each character in <em>ios</em>,
* passing the character as an argument. The stream must be opened for
* reading or an <code>IOError</code> will be raised.
*
* f = File.new("testfile")
* f.each_char {|c| print c, ' ' } #=> #<File:testfile>
*/
static VALUE
rb_io_each_char(VALUE io)
{
rb_io_t *fptr;
rb_encoding *enc;
VALUE c;
RETURN_ENUMERATOR(io, 0, 0);
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
enc = io_input_encoding(fptr);
READ_CHECK(fptr);
while (!NIL_P(c = io_getc(fptr, enc))) {
rb_yield(c);
}
return io;
}
/*
* call-seq:
* ios.lines(sep=$/) => anEnumerator
* ios.lines(limit) => anEnumerator
* ios.lines(sep, limit) => anEnumerator
*
* Returns an enumerator that gives each line in <em>ios</em>.
* The stream must be opened for reading or an <code>IOError</code>
* will be raised.
*
* f = File.new("testfile")
* f.lines.to_a #=> ["foo\n", "bar\n"]
* f.rewind
* f.lines.sort #=> ["bar\n", "foo\n"]
*/
static VALUE
rb_io_lines(int argc, VALUE *argv, VALUE io)
{
return rb_enumeratorize(io, ID2SYM(rb_intern("each_line")), argc, argv);
}
/*
* call-seq:
* ios.bytes => anEnumerator
*
* Returns an enumerator that gives each byte (0..255) in <em>ios</em>.
* The stream must be opened for reading or an <code>IOError</code>
* will be raised.
*
* f = File.new("testfile")
* f.bytes.to_a #=> [104, 101, 108, 108, 111]
* f.rewind
* f.bytes.sort #=> [101, 104, 108, 108, 111]
*/
static VALUE
rb_io_bytes(VALUE io)
{
return rb_enumeratorize(io, ID2SYM(rb_intern("each_byte")), 0, 0);
}
/*
* call-seq:
* ios.chars => anEnumerator
*
* Returns an enumerator that gives each character in <em>ios</em>.
* The stream must be opened for reading or an <code>IOError</code>
* will be raised.
*
* f = File.new("testfile")
* f.chars.to_a #=> ["h", "e", "l", "l", "o"]
* f.rewind
* f.chars.sort #=> ["e", "h", "l", "l", "o"]
*/
static VALUE
rb_io_chars(VALUE io)
{
return rb_enumeratorize(io, ID2SYM(rb_intern("each_char")), 0, 0);
}
/*
* call-seq:
* ios.getc => fixnum or nil
*
* Reads a one-character string from <em>ios</em>. Returns
* <code>nil</code> if called at end of file.
*
* f = File.new("testfile")
* f.getc #=> "8"
* f.getc #=> "1"
*/
static VALUE
rb_io_getc(VALUE io)
{
rb_io_t *fptr;
rb_encoding *enc;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
enc = io_input_encoding(fptr);
READ_CHECK(fptr);
return io_getc(fptr, enc);
}
int
rb_getc(FILE *f)
{
int c;
rb_read_check(f);
TRAP_BEG;
c = getc(f);
TRAP_END;
return c;
}
/*
* call-seq:
* ios.readchar => string
*
* Reads a one-character string from <em>ios</em>. Raises an
* <code>EOFError</code> on end of file.
*
* f = File.new("testfile")
* f.readchar #=> "8"
* f.readchar #=> "1"
*/
static VALUE
rb_io_readchar(VALUE io)
{
VALUE c = rb_io_getc(io);
if (NIL_P(c)) {
rb_eof_error();
}
return c;
}
/*
* call-seq:
* ios.getbyte => fixnum or nil
*
* Gets the next 8-bit byte (0..255) from <em>ios</em>. Returns
* <code>nil</code> if called at end of file.
*
* f = File.new("testfile")
* f.getbyte #=> 84
* f.getbyte #=> 104
*/
VALUE
rb_io_getbyte(VALUE io)
{
rb_io_t *fptr;
int c;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
READ_CHECK(fptr);
if (fptr->fd == 0 && (fptr->mode & FMODE_TTY) && TYPE(rb_stdout) == T_FILE) {
rb_io_t *ofp;
GetOpenFile(rb_stdout, ofp);
if (ofp->mode & FMODE_TTY) {
rb_io_flush(rb_stdout);
}
}
if (io_fillbuf(fptr) < 0) {
return Qnil;
}
fptr->rbuf_off++;
fptr->rbuf_len--;
c = (unsigned char)fptr->rbuf[fptr->rbuf_off-1];
return INT2FIX(c & 0xff);
}
/*
* call-seq:
* ios.readbyte => fixnum
*
* Reads a character as with <code>IO#getc</code>, but raises an
* <code>EOFError</code> on end of file.
*/
static VALUE
rb_io_readbyte(VALUE io)
{
VALUE c = rb_io_getbyte(io);
if (NIL_P(c)) {
rb_eof_error();
}
return c;
}
/*
* call-seq:
* ios.ungetc(string) => nil
*
* Pushes back one character (passed as a parameter) onto <em>ios</em>,
* such that a subsequent buffered read will return it. Only one character
* may be pushed back before a subsequent read operation (that is,
* you will be able to read only the last of several characters that have been pushed
* back). Has no effect with unbuffered reads (such as <code>IO#sysread</code>).
*
* f = File.new("testfile") #=> #<File:testfile>
* c = f.getc #=> "8"
* f.ungetc(c) #=> nil
* f.getc #=> "8"
*/
VALUE
rb_io_ungetc(VALUE io, VALUE c)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
if (NIL_P(c)) return Qnil;
if (FIXNUM_P(c)) {
int cc = FIX2INT(c);
rb_encoding *enc = io_read_encoding(fptr);
char buf[16];
c = rb_str_new(buf, rb_enc_mbcput(cc, buf, enc));
}
else {
SafeStringValue(c);
}
io_ungetc(c, fptr);
return Qnil;
}
/*
* call-seq:
* ios.isatty => true or false
* ios.tty? => true or false
*
* Returns <code>true</code> if <em>ios</em> is associated with a
* terminal device (tty), <code>false</code> otherwise.
*
* File.new("testfile").isatty #=> false
* File.new("/dev/tty").isatty #=> true
*/
static VALUE
rb_io_isatty(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (isatty(fptr->fd) == 0)
return Qfalse;
return Qtrue;
}
/*
* call-seq:
* ios.close_on_exec? => true or false
*
* Returns <code>true</code> if <em>ios</em> will be closed on exec.
*
* f = open("/dev/null")
* f.close_on_exec? #=> false
* f.close_on_exec = true
* f.close_on_exec? #=> true
* f.close_on_exec = false
* f.close_on_exec? #=> false
*/
static VALUE
rb_io_close_on_exec_p(VALUE io)
{
#if defined(HAVE_FCNTL) && defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)
rb_io_t *fptr;
VALUE write_io;
int fd, ret;
write_io = GetWriteIO(io);
if (io != write_io) {
GetOpenFile(write_io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fd, F_GETFD)) == -1) rb_sys_fail(fptr->path);
if (!(ret & FD_CLOEXEC)) return Qfalse;
}
}
GetOpenFile(io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fd, F_GETFD)) == -1) rb_sys_fail(fptr->path);
if (!(ret & FD_CLOEXEC)) return Qfalse;
}
return Qtrue;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif
}
/*
* call-seq:
* ios.close_on_exec = bool => true or false
*
* Sets a close-on-exec flag.
*
* f = open("/dev/null")
* f.close_on_exec = true
* system("cat", "/proc/self/fd/#{f.fileno}") # cat: /proc/self/fd/3: No such file or directory
* f.closed? #=> false
*/
static VALUE
rb_io_set_close_on_exec(VALUE io, VALUE arg)
{
#if defined(HAVE_FCNTL) && defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)
int flag = RTEST(arg) ? FD_CLOEXEC : 0;
rb_io_t *fptr;
VALUE write_io;
int fd, ret;
write_io = GetWriteIO(io);
if (io != write_io) {
GetOpenFile(write_io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fptr->fd, F_GETFD)) == -1) rb_sys_fail(fptr->path);
if ((ret & FD_CLOEXEC) != flag) {
ret = (ret & ~FD_CLOEXEC) | flag;
ret = fcntl(fd, F_SETFD, ret);
if (ret == -1) rb_sys_fail(fptr->path);
}
}
}
GetOpenFile(io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fd, F_GETFD)) == -1) rb_sys_fail(fptr->path);
if ((ret & FD_CLOEXEC) != flag) {
ret = (ret & ~FD_CLOEXEC) | flag;
ret = fcntl(fd, F_SETFD, ret);
if (ret == -1) rb_sys_fail(fptr->path);
}
}
#else
rb_notimplement();
#endif
return Qnil;
}
#define FMODE_PREP (1<<16)
#define IS_PREP_STDIO(f) ((f)->mode & FMODE_PREP)
#define PREP_STDIO_NAME(f) ((f)->path)
static void
fptr_finalize(rb_io_t *fptr, int noraise)
{
int ebadf = 0;
if (fptr->wbuf_len) {
io_fflush(fptr);
}
if (IS_PREP_STDIO(fptr) ||
fptr->fd <= 2) {
return;
}
if (fptr->stdio_file) {
if (fclose(fptr->stdio_file) < 0 && !noraise) {
/* fptr->stdio_file is deallocated anyway */
fptr->stdio_file = 0;
fptr->fd = -1;
rb_sys_fail(fptr->path);
}
}
else if (0 <= fptr->fd) {
if (close(fptr->fd) < 0 && !noraise) {
if (errno != EBADF) {
/* fptr->fd is still not closed */
rb_sys_fail(fptr->path);
}
else {
/* fptr->fd is already closed. */
ebadf = 1;
}
}
}
fptr->fd = -1;
fptr->stdio_file = 0;
fptr->mode &= ~(FMODE_READABLE|FMODE_WRITABLE);
if (ebadf) {
rb_sys_fail(fptr->path);
}
}
static void
rb_io_fptr_cleanup(rb_io_t *fptr, int noraise)
{
if (fptr->finalize) {
(*fptr->finalize)(fptr, noraise);
}
else {
fptr_finalize(fptr, noraise);
}
}
int
rb_io_fptr_finalize(rb_io_t *fptr)
{
if (!fptr) return 0;
if (fptr->refcnt <= 0 || --fptr->refcnt) return 0;
if (fptr->path) {
free(fptr->path);
fptr->path = 0;
}
if (0 <= fptr->fd)
rb_io_fptr_cleanup(fptr, Qtrue);
if (fptr->rbuf) {
free(fptr->rbuf);
fptr->rbuf = 0;
}
if (fptr->wbuf) {
free(fptr->wbuf);
fptr->wbuf = 0;
}
free(fptr);
return 1;
}
VALUE
rb_io_close(VALUE io)
{
rb_io_t *fptr;
int fd;
VALUE write_io;
rb_io_t *write_fptr;
write_io = GetWriteIO(io);
if (io != write_io) {
write_fptr = RFILE(write_io)->fptr;
if (write_fptr && 0 <= write_fptr->fd) {
rb_io_fptr_cleanup(write_fptr, Qtrue);
}
}
fptr = RFILE(io)->fptr;
if (!fptr) return Qnil;
if (fptr->fd < 0) return Qnil;
fd = fptr->fd;
rb_io_fptr_cleanup(fptr, Qfalse);
rb_thread_fd_close(fd);
if (fptr->pid) {
rb_syswait(fptr->pid);
fptr->pid = 0;
}
return Qnil;
}
/*
* call-seq:
* ios.close => nil
*
* Closes <em>ios</em> and flushes any pending writes to the operating
* system. The stream is unavailable for any further data operations;
* an <code>IOError</code> is raised if such an attempt is made. I/O
* streams are automatically closed when they are claimed by the
* garbage collector.
*
* If <em>ios</em> is opened by <code>IO.popen</code>,
* <code>close</code> sets <code>$?</code>.
*/
static VALUE
rb_io_close_m(VALUE io)
{
if (rb_safe_level() >= 4 && !OBJ_TAINTED(io)) {
rb_raise(rb_eSecurityError, "Insecure: can't close");
}
rb_io_check_closed(RFILE(io)->fptr);
rb_io_close(io);
return Qnil;
}
static VALUE
io_call_close(VALUE io)
{
return rb_funcall(io, rb_intern("close"), 0, 0);
}
static VALUE
io_close(VALUE io)
{
return rb_rescue(io_call_close, io, 0, 0);
}
/*
* call-seq:
* ios.closed? => true or false
*
* Returns <code>true</code> if <em>ios</em> is completely closed (for
* duplex streams, both reader and writer), <code>false</code>
* otherwise.
*
* f = File.new("testfile")
* f.close #=> nil
* f.closed? #=> true
* f = IO.popen("/bin/sh","r+")
* f.close_write #=> nil
* f.closed? #=> false
* f.close_read #=> nil
* f.closed? #=> true
*/
static VALUE
rb_io_closed(VALUE io)
{
rb_io_t *fptr;
VALUE write_io;
rb_io_t *write_fptr;
write_io = GetWriteIO(io);
if (io != write_io) {
write_fptr = RFILE(write_io)->fptr;
if (write_fptr && 0 <= write_fptr->fd) {
return Qfalse;
}
}
fptr = RFILE(io)->fptr;
rb_io_check_initialized(fptr);
return 0 <= fptr->fd ? Qfalse : Qtrue;
}
/*
* call-seq:
* ios.close_read => nil
*
* Closes the read end of a duplex I/O stream (i.e., one that contains
* both a read and a write stream, such as a pipe). Will raise an
* <code>IOError</code> if the stream is not duplexed.
*
* f = IO.popen("/bin/sh","r+")
* f.close_read
* f.readlines
*
* <em>produces:</em>
*
* prog.rb:3:in `readlines': not opened for reading (IOError)
* from prog.rb:3
*/
static VALUE
rb_io_close_read(VALUE io)
{
rb_io_t *fptr;
VALUE write_io;
if (rb_safe_level() >= 4 && !OBJ_TAINTED(io)) {
rb_raise(rb_eSecurityError, "Insecure: can't close");
}
GetOpenFile(io, fptr);
if (is_socket(fptr->fd, fptr->path)) {
#ifndef SHUT_RD
# define SHUT_RD 0
#endif
if (shutdown(fptr->fd, SHUT_RD) < 0)
rb_sys_fail(fptr->path);
fptr->mode &= ~FMODE_READABLE;
if (!(fptr->mode & FMODE_WRITABLE))
return rb_io_close(io);
return Qnil;
}
write_io = GetWriteIO(io);
if (io != write_io) {
rb_io_t *wfptr;
fptr_finalize(fptr, Qfalse);
GetOpenFile(write_io, wfptr);
if (fptr->refcnt < LONG_MAX) {
wfptr->refcnt++;
RFILE(io)->fptr = wfptr;
rb_io_fptr_finalize(fptr);
}
return Qnil;
}
if (fptr->mode & FMODE_WRITABLE) {
rb_raise(rb_eIOError, "closing non-duplex IO for reading");
}
return rb_io_close(io);
}
/*
* call-seq:
* ios.close_write => nil
*
* Closes the write end of a duplex I/O stream (i.e., one that contains
* both a read and a write stream, such as a pipe). Will raise an
* <code>IOError</code> if the stream is not duplexed.
*
* f = IO.popen("/bin/sh","r+")
* f.close_write
* f.print "nowhere"
*
* <em>produces:</em>
*
* prog.rb:3:in `write': not opened for writing (IOError)
* from prog.rb:3:in `print'
* from prog.rb:3
*/
static VALUE
rb_io_close_write(VALUE io)
{
rb_io_t *fptr;
VALUE write_io;
if (rb_safe_level() >= 4 && !OBJ_TAINTED(io)) {
rb_raise(rb_eSecurityError, "Insecure: can't close");
}
write_io = GetWriteIO(io);
GetOpenFile(write_io, fptr);
if (is_socket(fptr->fd, fptr->path)) {
#ifndef SHUT_WR
# define SHUT_WR 1
#endif
if (shutdown(fptr->fd, SHUT_WR) < 0)
rb_sys_fail(fptr->path);
fptr->mode &= ~FMODE_WRITABLE;
if (!(fptr->mode & FMODE_READABLE))
return rb_io_close(write_io);
return Qnil;
}
if (fptr->mode & FMODE_READABLE) {
rb_raise(rb_eIOError, "closing non-duplex IO for writing");
}
rb_io_close(write_io);
if (io != write_io) {
GetOpenFile(io, fptr);
fptr->tied_io_for_writing = 0;
fptr->mode &= ~FMODE_DUPLEX;
}
return Qnil;
}
/*
* call-seq:
* ios.sysseek(offset, whence=SEEK_SET) => integer
*
* Seeks to a given <i>offset</i> in the stream according to the value
* of <i>whence</i> (see <code>IO#seek</code> for values of
* <i>whence</i>). Returns the new offset into the file.
*
* f = File.new("testfile")
* f.sysseek(-13, IO::SEEK_END) #=> 53
* f.sysread(10) #=> "And so on."
*/
static VALUE
rb_io_sysseek(int argc, VALUE *argv, VALUE io)
{
VALUE offset, ptrname;
int whence = SEEK_SET;
rb_io_t *fptr;
off_t pos;
if (rb_scan_args(argc, argv, "11", &offset, &ptrname) == 2) {
whence = NUM2INT(ptrname);
}
pos = NUM2OFFT(offset);
GetOpenFile(io, fptr);
if ((fptr->mode & FMODE_READABLE) && READ_DATA_BUFFERED(fptr)) {
rb_raise(rb_eIOError, "sysseek for buffered IO");
}
if ((fptr->mode & FMODE_WRITABLE) && fptr->wbuf_len) {
rb_warn("sysseek for buffered IO");
}
pos = lseek(fptr->fd, pos, whence);
if (pos == -1) rb_sys_fail(fptr->path);
return OFFT2NUM(pos);
}
/*
* call-seq:
* ios.syswrite(string) => integer
*
* Writes the given string to <em>ios</em> using a low-level write.
* Returns the number of bytes written. Do not mix with other methods
* that write to <em>ios</em> or you may get unpredictable results.
* Raises <code>SystemCallError</code> on error.
*
* f = File.new("out", "w")
* f.syswrite("ABCDEF") #=> 6
*/
static VALUE
rb_io_syswrite(VALUE io, VALUE str)
{
rb_io_t *fptr;
long n;
rb_secure(4);
if (TYPE(str) != T_STRING)
str = rb_obj_as_string(str);
io = GetWriteIO(io);
GetOpenFile(io, fptr);
rb_io_check_writable(fptr);
if (fptr->wbuf_len) {
rb_warn("syswrite for buffered IO");
}
if (!rb_thread_fd_writable(fptr->fd)) {
rb_io_check_closed(fptr);
}
TRAP_BEG;
n = write(fptr->fd, RSTRING_PTR(str), RSTRING_LEN(str));
TRAP_END;
if (n == -1) rb_sys_fail(fptr->path);
return LONG2FIX(n);
}
/*
* call-seq:
* ios.sysread(integer[, outbuf]) => string
*
* Reads <i>integer</i> bytes from <em>ios</em> using a low-level
* read and returns them as a string. Do not mix with other methods
* that read from <em>ios</em> or you may get unpredictable results.
* If the optional <i>outbuf</i> argument is present, it must reference
* a String, which will receive the data.
* Raises <code>SystemCallError</code> on error and
* <code>EOFError</code> at end of file.
*
* f = File.new("testfile")
* f.sysread(16) #=> "This is line one"
*/
static VALUE
rb_io_sysread(int argc, VALUE *argv, VALUE io)
{
VALUE len, str;
rb_io_t *fptr;
long n, ilen;
rb_scan_args(argc, argv, "11", &len, &str);
ilen = NUM2LONG(len);
if (NIL_P(str)) {
str = rb_str_new(0, ilen);
}
else {
StringValue(str);
rb_str_modify(str);
rb_str_resize(str, ilen);
}
if (ilen == 0) return str;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
if (READ_DATA_BUFFERED(fptr)) {
rb_raise(rb_eIOError, "sysread for buffered IO");
}
n = fptr->fd;
rb_thread_wait_fd(fptr->fd);
rb_io_check_closed(fptr);
if (RSTRING_LEN(str) != ilen) {
rb_raise(rb_eRuntimeError, "buffer string modified");
}
n = rb_read_internal(fptr->fd, RSTRING_PTR(str), ilen);
if (n == -1) {
rb_sys_fail(fptr->path);
}
rb_str_set_len(str, n);
if (n == 0 && ilen > 0) {
rb_eof_error();
}
rb_str_resize(str, n);
OBJ_TAINT(str);
return str;
}
VALUE
rb_io_binmode(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
#if defined(_WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(__human68k__) || defined(__EMX__)
if (!(fptr->mode & FMODE_BINMODE) && READ_DATA_BUFFERED(fptr)) {
rb_raise(rb_eIOError, "buffer already filled with text-mode content");
}
if (0 <= fptr->fd && setmode(fptr->fd, O_BINARY) == -1)
rb_sys_fail(fptr->path);
#endif
fptr->mode |= FMODE_BINMODE;
return io;
}
/*
* call-seq:
* ios.binmode => ios
*
* Puts <em>ios</em> into binary mode. This is useful only in
* MS-DOS/Windows environments. Once a stream is in binary mode, it
* cannot be reset to nonbinary mode.
*/
static VALUE
rb_io_binmode_m(VALUE io)
{
#if defined(_WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(__human68k__) || defined(__EMX__)
VALUE write_io;
#endif
rb_io_binmode(io);
#if defined(_WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(__human68k__) || defined(__EMX__)
write_io = GetWriteIO(io);
if (write_io != io)
rb_io_binmode(write_io);
#endif
return io;
}
static const char*
rb_io_flags_mode(int flags)
{
#ifdef O_BINARY
# define MODE_BINMODE(a,b) ((flags & FMODE_BINMODE) ? (b) : (a))
#else
# define MODE_BINMODE(a,b) (a)
#endif
if (flags & FMODE_APPEND) {
if ((flags & FMODE_READWRITE) == FMODE_READWRITE) {
return MODE_BINMODE("a+", "ab+");
}
return MODE_BINMODE("a", "ab");
}
switch (flags & FMODE_READWRITE) {
case FMODE_READABLE:
return MODE_BINMODE("r", "rb");
case FMODE_WRITABLE:
return MODE_BINMODE("w", "wb");
case FMODE_READWRITE:
if (flags & FMODE_CREATE) {
return MODE_BINMODE("w+", "wb+");
}
return MODE_BINMODE("r+", "rb+");
}
rb_raise(rb_eArgError, "invalid access modenum %o", flags);
return NULL; /* not reached */
}
int
rb_io_mode_flags(const char *mode)
{
int flags = 0;
const char *m = mode;
switch (*m++) {
case 'r':
flags |= FMODE_READABLE;
break;
case 'w':
flags |= FMODE_WRITABLE | FMODE_CREATE;
break;
case 'a':
flags |= FMODE_WRITABLE | FMODE_APPEND | FMODE_CREATE;
break;
default:
error:
rb_raise(rb_eArgError, "invalid access mode %s", mode);
}
while (*m) {
switch (*m++) {
case 'b':
flags |= FMODE_BINMODE;
break;
case '+':
flags |= FMODE_READWRITE;
break;
default:
goto error;
case ':':
return flags;
}
}
return flags;
}
int
rb_io_modenum_flags(int mode)
{
int flags = 0;
switch (mode & (O_RDONLY|O_WRONLY|O_RDWR)) {
case O_RDONLY:
flags = FMODE_READABLE;
break;
case O_WRONLY:
flags = FMODE_WRITABLE;
break;
case O_RDWR:
flags = FMODE_READWRITE;
break;
}
if (mode & O_APPEND) {
flags |= FMODE_APPEND;
}
if (mode & O_CREAT) {
flags |= FMODE_CREATE;
}
#ifdef O_BINARY
if (mode & O_BINARY) {
flags |= FMODE_BINMODE;
}
#endif
return flags;
}
int
rb_io_mode_modenum(const char *mode)
{
int flags = 0;
const char *m = mode;
switch (*m++) {
case 'r':
flags |= O_RDONLY;
break;
case 'w':
flags |= O_WRONLY | O_CREAT | O_TRUNC;
break;
case 'a':
flags |= O_WRONLY | O_CREAT | O_APPEND;
break;
default:
error:
rb_raise(rb_eArgError, "invalid access mode %s", mode);
}
while (*m) {
switch (*m++) {
case 'b':
#ifdef O_BINARY
flags |= O_BINARY;
#endif
break;
case '+':
flags = (flags & ~O_ACCMODE) | O_RDWR;
break;
default:
goto error;
case ':':
return flags;
}
}
return flags;
}
#define MODENUM_MAX 4
static const char*
rb_io_modenum_mode(int flags)
{
#ifdef O_BINARY
# define MODE_BINARY(a,b) ((flags & O_BINARY) ? (b) : (a))
#else
# define MODE_BINARY(a,b) (a)
#endif
if (flags & O_APPEND) {
if ((flags & O_RDWR) == O_RDWR) {
return MODE_BINARY("a+", "ab+");
}
return MODE_BINARY("a", "ab");
}
switch (flags & (O_RDONLY|O_WRONLY|O_RDWR)) {
case O_RDONLY:
return MODE_BINARY("r", "rb");
case O_WRONLY:
return MODE_BINARY("w", "wb");
case O_RDWR:
return MODE_BINARY("r+", "rb+");
}
rb_raise(rb_eArgError, "invalid access modenum %o", flags);
return NULL; /* not reached */
}
static void
mode_enc(rb_io_t *fptr, const char *estr)
{
const char *p0, *p1;
char *enc2name;
int idx, idx2;
p0 = strrchr(estr, ':');
if (!p0) p1 = estr;
else p1 = p0 + 1;
idx = rb_enc_find_index(p1);
if (idx >= 0) {
fptr->enc = rb_enc_from_index(idx);
}
else {
rb_warn("Unsupported encoding %s ignored", p1);
}
if (p0) {
int n = p0 - estr;
if (n > ENCODING_MAXNAMELEN) {
idx2 = -1;
}
else {
enc2name = ALLOCA_N(char, n+1);
memcpy(enc2name, estr, n);
enc2name[n] = '\0';
estr = enc2name;
idx2 = rb_enc_find_index(enc2name);
}
if (idx2 < 0) {
rb_warn("Unsupported encoding %.*s ignored", n, estr);
}
else if (idx2 == idx) {
rb_warn("Ignoring internal encoding %.*s: it is identical to external encoding %s",
n, estr, p1);
}
else {
fptr->enc2 = rb_enc_from_index(idx2);
}
}
}
void
rb_io_mode_enc(rb_io_t *fptr, const char *mode)
{
const char *p = strchr(mode, ':');
if (p) {
mode_enc(fptr, p+1);
}
}
struct sysopen_struct {
char *fname;
int flag;
unsigned int mode;
};
static VALUE
sysopen_func(void *ptr)
{
struct sysopen_struct *data = ptr;
return (VALUE)open(data->fname, data->flag, data->mode);
}
static int
rb_sysopen_internal(char *fname, int flags, unsigned int mode)
{
struct sysopen_struct data;
data.fname = fname;
data.flag = flags;
data.mode = mode;
return (int)rb_thread_blocking_region(sysopen_func, &data, RB_UBF_DFL, 0);
}
static int
rb_sysopen(char *fname, int flags, unsigned int mode)
{
int fd;
fd = rb_sysopen_internal(fname, flags, mode);
if (fd < 0) {
if (errno == EMFILE || errno == ENFILE) {
rb_gc();
fd = rb_sysopen_internal(fname, flags, mode);
}
if (fd < 0) {
rb_sys_fail(fname);
}
}
UPDATE_MAXFD(fd);
return fd;
}
FILE *
rb_fopen(const char *fname, const char *mode)
{
FILE *file;
file = fopen(fname, mode);
if (!file) {
if (errno == EMFILE || errno == ENFILE) {
rb_gc();
file = fopen(fname, mode);
}
if (!file) {
rb_sys_fail(fname);
}
}
#ifdef USE_SETVBUF
if (setvbuf(file, NULL, _IOFBF, 0) != 0)
rb_warn("setvbuf() can't be honoured for %s", fname);
#endif
#ifdef __human68k__
setmode(fileno(file), O_TEXT);
#endif
return file;
}
FILE *
rb_fdopen(int fd, const char *mode)
{
FILE *file;
#if defined(sun)
errno = 0;
#endif
file = fdopen(fd, mode);
if (!file) {
if (
#if defined(sun)
errno == 0 ||
#endif
errno == EMFILE || errno == ENFILE) {
rb_gc();
#if defined(sun)
errno = 0;
#endif
file = fdopen(fd, mode);
}
if (!file) {
#ifdef _WIN32
if (errno == 0) errno = EINVAL;
#elif defined(sun)
if (errno == 0) errno = EMFILE;
#endif
rb_sys_fail(0);
}
}
/* xxx: should be _IONBF? A buffer in FILE may have trouble. */
#ifdef USE_SETVBUF
if (setvbuf(file, NULL, _IOFBF, 0) != 0)
rb_warn("setvbuf() can't be honoured (fd=%d)", fd);
#endif
return file;
}
static void
io_check_tty(rb_io_t *fptr)
{
if (isatty(fptr->fd))
fptr->mode |= FMODE_TTY|FMODE_DUPLEX;
}
static VALUE
rb_file_open_internal(VALUE io, const char *fname, const char *mode)
{
rb_io_t *fptr;
MakeOpenFile(io, fptr);
fptr->mode = rb_io_mode_flags(mode);
rb_io_mode_enc(fptr, mode);
fptr->path = strdup(fname);
fptr->fd = rb_sysopen(fptr->path, rb_io_mode_modenum(rb_io_flags_mode(fptr->mode)), 0666);
io_check_tty(fptr);
return io;
}
VALUE
rb_file_open(const char *fname, const char *mode)
{
return rb_file_open_internal(io_alloc(rb_cFile), fname, mode);
}
static VALUE
rb_file_sysopen_internal(VALUE io, const char *fname, int flags, int mode)
{
rb_io_t *fptr;
MakeOpenFile(io, fptr);
fptr->path = strdup(fname);
fptr->mode = rb_io_modenum_flags(flags);
fptr->fd = rb_sysopen(fptr->path, flags, mode);
io_check_tty(fptr);
return io;
}
VALUE
rb_file_sysopen(const char *fname, int flags, int mode)
{
return rb_file_sysopen_internal(io_alloc(rb_cFile), fname, flags, mode);
}
#if defined(__CYGWIN__) || !defined(HAVE_FORK)
static struct pipe_list {
rb_io_t *fptr;
struct pipe_list *next;
} *pipe_list;
static void
pipe_add_fptr(rb_io_t *fptr)
{
struct pipe_list *list;
list = ALLOC(struct pipe_list);
list->fptr = fptr;
list->next = pipe_list;
pipe_list = list;
}
static void
pipe_del_fptr(rb_io_t *fptr)
{
struct pipe_list *list = pipe_list;
struct pipe_list *tmp;
if (list->fptr == fptr) {
pipe_list = list->next;
free(list);
return;
}
while (list->next) {
if (list->next->fptr == fptr) {
tmp = list->next;
list->next = list->next->next;
free(tmp);
return;
}
list = list->next;
}
}
static void
pipe_atexit(void)
{
struct pipe_list *list = pipe_list;
struct pipe_list *tmp;
while (list) {
tmp = list->next;
rb_io_fptr_finalize(list->fptr);
list = tmp;
}
}
static void
pipe_finalize(rb_io_t *fptr, int noraise)
{
#if !defined(HAVE_FORK) && !defined(_WIN32)
int status;
if (fptr->stdio_file) {
status = pclose(fptr->stdio_file);
}
fptr->fd = -1;
fptr->stdio_file = 0;
#if defined DJGPP
status <<= 8;
#endif
rb_last_status_set(status, fptr->pid);
#else
fptr_finalize(fptr, noraise);
#endif
pipe_del_fptr(fptr);
}
#endif
void
rb_io_synchronized(rb_io_t *fptr)
{
rb_io_check_initialized(fptr);
fptr->mode |= FMODE_SYNC;
}
void
rb_io_unbuffered(rb_io_t *fptr)
{
rb_io_synchronized(fptr);
}
#ifdef HAVE_FORK
struct popen_arg {
struct rb_exec_arg *execp;
int modef;
int pair[2];
int write_pair[2];
};
static void
popen_redirect(struct popen_arg *p)
{
if ((p->modef & FMODE_READABLE) && (p->modef & FMODE_WRITABLE)) {
close(p->write_pair[1]);
if (p->write_pair[0] != 0) {
dup2(p->write_pair[0], 0);
close(p->write_pair[0]);
}
close(p->pair[0]);
if (p->pair[1] != 1) {
dup2(p->pair[1], 1);
close(p->pair[1]);
}
}
else if (p->modef & FMODE_READABLE) {
close(p->pair[0]);
if (p->pair[1] != 1) {
dup2(p->pair[1], 1);
close(p->pair[1]);
}
}
else {
close(p->pair[1]);
if (p->pair[0] != 0) {
dup2(p->pair[0], 0);
close(p->pair[0]);
}
}
}
void
rb_close_before_exec(int lowfd, int maxhint, VALUE noclose_fds)
{
int fd, ret;
int max = max_file_descriptor;
if (max < maxhint)
max = maxhint;
for (fd = lowfd; fd <= max; fd++) {
if (!NIL_P(noclose_fds) &&
RTEST(rb_hash_lookup(noclose_fds, INT2FIX(fd))))
continue;
#ifdef FD_CLOEXEC
ret = fcntl(fd, F_GETFD);
if (ret != -1 && !(ret & FD_CLOEXEC)) {
fcntl(fd, F_SETFD, ret|FD_CLOEXEC);
}
#else
close(fd);
#endif
}
}
static int
popen_exec(void *pp)
{
struct popen_arg *p = (struct popen_arg*)pp;
rb_thread_atfork_before_exec();
return rb_exec(p->execp);
}
#endif
static VALUE
pipe_open(struct rb_exec_arg *eargp, VALUE prog, const char *mode)
{
int modef = rb_io_mode_flags(mode);
int pid = 0;
rb_io_t *fptr;
VALUE port;
rb_io_t *write_fptr;
VALUE write_port;
#if defined(HAVE_FORK)
int status;
struct popen_arg arg;
#elif defined(_WIN32)
int openmode = rb_io_mode_modenum(mode);
const char *exename = NULL;
volatile VALUE cmdbuf;
struct rb_exec_arg sarg;
#endif
FILE *fp = 0;
int fd = -1;
int write_fd = -1;
const char *cmd = 0;
int argc;
VALUE *argv;
if (prog)
cmd = StringValueCStr(prog);
if (!eargp) {
/* fork : IO.popen("-") */
argc = 0;
argv = 0;
}
else if (eargp->argc) {
/* no shell : IO.popen([prog, arg0], arg1, ...) */
argc = eargp->argc;
argv = eargp->argv;
}
else {
/* with shell : IO.popen(prog) */
argc = 0;
argv = 0;
}
#if defined(HAVE_FORK)
arg.execp = eargp;
arg.modef = modef;
arg.pair[0] = arg.pair[1] = -1;
arg.write_pair[0] = arg.write_pair[1] = -1;
switch (modef & (FMODE_READABLE|FMODE_WRITABLE)) {
case FMODE_READABLE|FMODE_WRITABLE:
if (pipe(arg.write_pair) < 0)
rb_sys_fail(cmd);
UPDATE_MAXFD_PIPE(arg.write_pair);
if (pipe(arg.pair) < 0) {
int e = errno;
close(arg.write_pair[0]);
close(arg.write_pair[1]);
errno = e;
rb_sys_fail(cmd);
}
UPDATE_MAXFD_PIPE(arg.pair);
if (eargp) {
rb_exec_arg_addopt(eargp, INT2FIX(0), INT2FIX(arg.write_pair[0]));
rb_exec_arg_addopt(eargp, INT2FIX(1), INT2FIX(arg.pair[1]));
}
break;
case FMODE_READABLE:
if (pipe(arg.pair) < 0)
rb_sys_fail(cmd);
UPDATE_MAXFD_PIPE(arg.pair);
if (eargp)
rb_exec_arg_addopt(eargp, INT2FIX(1), INT2FIX(arg.pair[1]));
break;
case FMODE_WRITABLE:
if (pipe(arg.pair) < 0)
rb_sys_fail(cmd);
UPDATE_MAXFD_PIPE(arg.pair);
if (eargp)
rb_exec_arg_addopt(eargp, INT2FIX(0), INT2FIX(arg.pair[0]));
break;
default:
rb_sys_fail(cmd);
}
if (eargp) {
rb_exec_arg_fixup(arg.execp);
pid = rb_fork(&status, popen_exec, &arg, arg.execp->redirect_fds);
}
else {
fflush(stdin); /* is it really needed? */
rb_io_flush(rb_stdout);
rb_io_flush(rb_stderr);
pid = rb_fork(&status, 0, 0, Qnil);
if (pid == 0) { /* child */
popen_redirect(&arg);
rb_io_synchronized(RFILE(orig_stdout)->fptr);
rb_io_synchronized(RFILE(orig_stderr)->fptr);
return Qnil;
}
}
/* parent */
if (pid == -1) {
int e = errno;
close(arg.pair[0]);
close(arg.pair[1]);
if ((modef & (FMODE_READABLE|FMODE_WRITABLE)) == (FMODE_READABLE|FMODE_WRITABLE)) {
close(arg.write_pair[0]);
close(arg.write_pair[1]);
}
errno = e;
rb_sys_fail(cmd);
}
if ((modef & FMODE_READABLE) && (modef & FMODE_WRITABLE)) {
close(arg.pair[1]);
fd = arg.pair[0];
close(arg.write_pair[0]);
write_fd = arg.write_pair[1];
}
else if (modef & FMODE_READABLE) {
close(arg.pair[1]);
fd = arg.pair[0];
}
else {
close(arg.pair[0]);
fd = arg.pair[1];
}
#elif defined(_WIN32)
if (argc) {
volatile VALUE argbuf;
char **args;
int i;
if (argc >= FIXNUM_MAX / sizeof(char *)) {
rb_raise(rb_eArgError, "too many arguments");
}
argbuf = rb_str_tmp_new((argc+1) * sizeof(char *));
args = (void *)RSTRING_PTR(argbuf);
for (i = 0; i < argc; ++i) {
args[i] = StringValueCStr(argv[i]);
}
args[i] = NULL;
exename = cmd;
cmdbuf = rb_str_tmp_new(rb_w32_argv_size(args));
cmd = rb_w32_join_argv(RSTRING_PTR(cmdbuf), args);
rb_str_resize(argbuf, 0);
}
if (eargp) {
rb_exec_arg_fixup(eargp);
rb_run_exec_options(eargp, &sarg);
}
while ((pid = rb_w32_pipe_exec(cmd, exename, openmode, &fd, &write_fd)) == -1) {
/* exec failed */
switch (errno) {
case EAGAIN:
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
rb_thread_sleep(1);
break;
default:
if (eargp)
rb_run_exec_options(&sarg, NULL);
rb_sys_fail(cmd);
break;
}
}
if (eargp)
rb_run_exec_options(&sarg, NULL);
#else
if (argc) {
prog = rb_ary_join(rb_ary_new4(argc, argv), rb_str_new2(" "));
cmd = StringValueCStr(prog);
}
if (eargp) {
rb_exec_arg_fixup(eargp);
rb_run_exec_options(eargp, &sarg);
}
fp = popen(cmd, mode);
if (eargp)
rb_run_exec_options(&sarg, NULL);
if (!fp) rb_sys_fail(RSTRING_PTR(prog));
fd = fileno(fp);
#endif
port = io_alloc(rb_cIO);
MakeOpenFile(port, fptr);
fptr->fd = fd;
fptr->stdio_file = fp;
fptr->mode = modef | FMODE_SYNC|FMODE_DUPLEX;
rb_io_mode_enc(fptr, mode);
fptr->pid = pid;
if (0 <= write_fd) {
write_port = io_alloc(rb_cIO);
MakeOpenFile(write_port, write_fptr);
write_fptr->fd = write_fd;
write_fptr->mode = (modef & ~FMODE_READABLE)| FMODE_SYNC|FMODE_DUPLEX;
fptr->mode &= ~FMODE_WRITABLE;
fptr->tied_io_for_writing = write_port;
rb_ivar_set(port, rb_intern("@tied_io_for_writing"), write_port);
}
#if defined (__CYGWIN__) || !defined(HAVE_FORK)
fptr->finalize = pipe_finalize;
pipe_add_fptr(fptr);
#endif
return port;
}
static VALUE
pipe_open_v(int argc, VALUE *argv, const char *mode)
{
VALUE prog;
struct rb_exec_arg earg;
prog = rb_exec_arg_init(argc, argv, Qfalse, &earg);
return pipe_open(&earg, prog, mode);
}
static VALUE
pipe_open_s(VALUE prog, const char *mode)
{
const char *cmd = RSTRING_PTR(prog);
int argc = 1;
VALUE *argv = &prog;
struct rb_exec_arg earg;
if (RSTRING_LEN(prog) == 1 && cmd[0] == '-') {
#if !defined(HAVE_FORK)
rb_raise(rb_eNotImpError,
"fork() function is unimplemented on this machine");
#endif
return pipe_open(0, 0, mode);
}
rb_exec_arg_init(argc, argv, Qtrue, &earg);
return pipe_open(&earg, prog, mode);
}
/*
* call-seq:
* IO.popen(cmd, mode="r") => io
* IO.popen(cmd, mode="r") {|io| block } => obj
*
* Runs the specified command as a subprocess; the subprocess's
* standard input and output will be connected to the returned
* <code>IO</code> object. If _cmd_ is a +String+
* ``<code>-</code>'', then a new instance of Ruby is started as the
* subprocess. If <i>cmd</i> is an +Array+ of +String+, then it will
* be used as the subprocess's +argv+ bypassing a shell.
* The array can contains a hash at first for environments and
* a hash at last for options similar to <code>spawn</code>. The default
* mode for the new file object is ``r'', but <i>mode</i> may be set
* to any of the modes listed in the description for class IO.
*
* Raises exceptions which <code>IO::pipe</code> and
* <code>Kernel::system</code> raise.
*
* If a block is given, Ruby will run the command as a child connected
* to Ruby with a pipe. Ruby's end of the pipe will be passed as a
* parameter to the block.
* At the end of block, Ruby close the pipe and sets <code>$?</code>.
* In this case <code>IO::popen</code> returns
* the value of the block.
*
* If a block is given with a _cmd_ of ``<code>-</code>'',
* the block will be run in two separate processes: once in the parent,
* and once in a child. The parent process will be passed the pipe
* object as a parameter to the block, the child version of the block
* will be passed <code>nil</code>, and the child's standard in and
* standard out will be connected to the parent through the pipe. Not
* available on all platforms.
*
* f = IO.popen("uname")
* p f.readlines
* puts "Parent is #{Process.pid}"
* IO.popen("date") { |f| puts f.gets }
* IO.popen("-") {|f| $stderr.puts "#{Process.pid} is here, f is #{f}"}
* p $?
* IO.popen(%w"sed -e s|^|<foo>| -e s&$&;zot;&", "r+") {|f|
* f.puts "bar"; f.close_write; puts f.gets
* }
*
* <em>produces:</em>
*
* ["Linux\n"]
* Parent is 26166
* Wed Apr 9 08:53:52 CDT 2003
* 26169 is here, f is
* 26166 is here, f is #<IO:0x401b3d44>
* #<Process::Status: pid=26166,exited(0)>
* <foo>bar;zot;
*/
static VALUE
rb_io_s_popen(int argc, VALUE *argv, VALUE klass)
{
const char *mode;
VALUE pname, pmode, port, tmp;
if (rb_scan_args(argc, argv, "11", &pname, &pmode) == 1) {
mode = "r";
}
else if (FIXNUM_P(pmode)) {
mode = rb_io_modenum_mode(FIX2INT(pmode));
}
else {
mode = StringValueCStr(pmode);
}
tmp = rb_check_array_type(pname);
if (!NIL_P(tmp)) {
tmp = rb_ary_dup(tmp);
RBASIC(tmp)->klass = 0;
port = pipe_open_v(RARRAY_LEN(tmp), RARRAY_PTR(tmp), mode);
rb_ary_clear(tmp);
}
else {
SafeStringValue(pname);
port = pipe_open_s(pname, mode);
}
if (NIL_P(port)) {
/* child */
if (rb_block_given_p()) {
rb_yield(Qnil);
rb_io_flush(rb_stdout);
rb_io_flush(rb_stderr);
_exit(0);
}
return Qnil;
}
RBASIC(port)->klass = klass;
if (rb_block_given_p()) {
return rb_ensure(rb_yield, port, io_close, port);
}
return port;
}
static void
io_set_encoding(VALUE io, VALUE opt)
{
rb_io_t *fptr;
VALUE encoding=Qnil, extenc=Qnil, intenc=Qnil;
if (!NIL_P(opt)) {
VALUE v;
v = rb_hash_aref(opt, sym_encoding);
if (!NIL_P(v)) encoding = v;
v = rb_hash_aref(opt, sym_extenc);
if (!NIL_P(v)) extenc = v;
v = rb_hash_aref(opt, sym_intenc);
if (!NIL_P(v)) intenc = v;
}
if (!NIL_P(extenc)) {
rb_encoding *extencoding = rb_to_encoding(extenc);
GetOpenFile(io, fptr);
if (!NIL_P(encoding)) {
rb_warn("Ignoring encoding parameter '%s': external_encoding is used",
RSTRING_PTR(encoding));
}
if (!NIL_P(intenc)) {
rb_encoding *intencoding = rb_to_encoding(intenc);
if (extencoding == intencoding) {
rb_warn("Ignoring internal encoding '%s': it is identical to external encoding '%s'",
RSTRING_PTR(rb_inspect(intenc)),
RSTRING_PTR(rb_inspect(extenc)));
}
else {
fptr->enc2 = intencoding;
}
}
fptr->enc = extencoding;
}
else {
if (!NIL_P(intenc)) {
rb_raise(rb_eArgError, "External encoding must be specified when internal encoding is given");
}
if (!NIL_P(encoding)) {
GetOpenFile(io, fptr);
mode_enc(fptr, StringValueCStr(encoding));
}
}
}
static VALUE
rb_open_file(int argc, VALUE *argv, VALUE io)
{
VALUE opt, fname, vmode, perm;
const char *mode;
int flags;
unsigned int fmode;
opt = rb_check_convert_type(argv[argc-1], T_HASH, "Hash", "to_hash");
if (!NIL_P(opt)) {
VALUE v;
v = rb_hash_aref(opt, sym_mode);
if (!NIL_P(v)) vmode = v;
v = rb_hash_aref(opt, sym_perm);
if (!NIL_P(v)) perm = v;
argc -= 1;
}
rb_scan_args(argc, argv, "12", &fname, &vmode, &perm);
#if defined _WIN32 || defined __APPLE__
{
static rb_encoding *fs_encoding;
rb_encoding *fname_encoding = rb_enc_get(fname);
if (!fs_encoding)
fs_encoding = rb_filesystem_encoding();
if (rb_usascii_encoding() != fname_encoding
&& rb_ascii8bit_encoding() != fname_encoding
#if defined __APPLE__
&& rb_utf8_encoding() != fname_encoding
#endif
&& fs_encoding != fname_encoding) {
static VALUE fs_enc;
if (!fs_enc)
fs_enc = rb_enc_from_encoding(fs_encoding);
fname = rb_str_transcode(fname, fs_enc);
}
}
#endif
FilePathValue(fname);
if (FIXNUM_P(vmode) || !NIL_P(perm)) {
if (FIXNUM_P(vmode)) {
flags = FIX2INT(vmode);
}
else {
SafeStringValue(vmode);
flags = rb_io_mode_modenum(StringValueCStr(vmode));
}
fmode = NIL_P(perm) ? 0666 : NUM2UINT(perm);
rb_file_sysopen_internal(io, RSTRING_PTR(fname), flags, fmode);
}
else {
mode = NIL_P(vmode) ? "r" : StringValueCStr(vmode);
rb_file_open_internal(io, RSTRING_PTR(fname), mode);
}
io_set_encoding(io, opt);
return io;
}
/*
* call-seq:
* IO.open(fd, mode_string="r" ) => io
* IO.open(fd, mode_string="r" ) {|io| block } => obj
*
* With no associated block, <code>open</code> is a synonym for
* <code>IO::new</code>. If the optional code block is given, it will
* be passed <i>io</i> as an argument, and the IO object will
* automatically be closed when the block terminates. In this instance,
* <code>IO::open</code> returns the value of the block.
*
*/
static VALUE
rb_io_s_open(int argc, VALUE *argv, VALUE klass)
{
VALUE io = rb_class_new_instance(argc, argv, klass);
if (rb_block_given_p()) {
return rb_ensure(rb_yield, io, io_close, io);
}
return io;
}
/*
* call-seq:
* IO.sysopen(path, [mode, [perm]]) => fixnum
*
* Opens the given path, returning the underlying file descriptor as a
* <code>Fixnum</code>.
*
* IO.sysopen("testfile") #=> 3
*
*/
static VALUE
rb_io_s_sysopen(int argc, VALUE *argv)
{
VALUE fname, vmode, perm;
int flags, fd;
unsigned int fmode;
char *path;
rb_scan_args(argc, argv, "12", &fname, &vmode, &perm);
FilePathValue(fname);
if (NIL_P(vmode)) flags = O_RDONLY;
else if (FIXNUM_P(vmode)) flags = FIX2INT(vmode);
else {
SafeStringValue(vmode);
flags = rb_io_mode_modenum(StringValueCStr(vmode));
}
if (NIL_P(perm)) fmode = 0666;
else fmode = NUM2UINT(perm);
RB_GC_GUARD(fname) = rb_str_new4(fname);
path = RSTRING_PTR(fname);
fd = rb_sysopen(path, flags, fmode);
return INT2NUM(fd);
}
/*
* call-seq:
* open(path [, mode_enc [, perm]] ) => io or nil
* open(path [, mode_enc [, perm]] ) {|io| block } => obj
*
* Creates an <code>IO</code> object connected to the given stream,
* file, or subprocess.
*
* If <i>path</i> does not start with a pipe character
* (``<code>|</code>''), treat it as the name of a file to open using
* the specified mode (defaulting to ``<code>r</code>'').
*
* The mode_enc is
* either a string or an integer. If it is an integer, it must be
* bitwise-or of open(2) flags, such as File::RDWR or File::EXCL.
* If it is a string, it is either "mode", "mode:ext_enc", or
* "mode:ext_enc:int_enc".
* The mode is one of the following:
*
* r: read (default)
* w: write
* a: append
*
* The mode can be followed by "b" (means binary-mode), or "+"
* (means both reading and writing allowed) or both.
* If ext_enc (external encoding) is specified,
* read string will be tagged by the encoding in reading,
* and output string will be converted
* to the specified encoding in writing.
* If two encoding names,
* ext_enc and int_enc (external encoding and internal encoding),
* are specified, the read string is converted from ext_enc
* to int_enc then tagged with the int_enc in read mode,
* and in write mode, the output string will be
* converted from int_enc to ext_enc before writing.
*
* If a file is being created, its initial permissions may be
* set using the integer third parameter.
*
* If a block is specified, it will be invoked with the
* <code>File</code> object as a parameter, and the file will be
* automatically closed when the block terminates. The call
* returns the value of the block.
*
* If <i>path</i> starts with a pipe character, a subprocess is
* created, connected to the caller by a pair of pipes. The returned
* <code>IO</code> object may be used to write to the standard input
* and read from the standard output of this subprocess. If the command
* following the ``<code>|</code>'' is a single minus sign, Ruby forks,
* and this subprocess is connected to the parent. In the subprocess,
* the <code>open</code> call returns <code>nil</code>. If the command
* is not ``<code>-</code>'', the subprocess runs the command. If a
* block is associated with an <code>open("|-")</code> call, that block
* will be run twice---once in the parent and once in the child. The
* block parameter will be an <code>IO</code> object in the parent and
* <code>nil</code> in the child. The parent's <code>IO</code> object
* will be connected to the child's <code>$stdin</code> and
* <code>$stdout</code>. The subprocess will be terminated at the end
* of the block.
*
* open("testfile") do |f|
* print f.gets
* end
*
* <em>produces:</em>
*
* This is line one
*
* Open a subprocess and read its output:
*
* cmd = open("|date")
* print cmd.gets
* cmd.close
*
* <em>produces:</em>
*
* Wed Apr 9 08:56:31 CDT 2003
*
* Open a subprocess running the same Ruby program:
*
* f = open("|-", "w+")
* if f == nil
* puts "in Child"
* exit
* else
* puts "Got: #{f.gets}"
* end
*
* <em>produces:</em>
*
* Got: in Child
*
* Open a subprocess using a block to receive the I/O object:
*
* open("|-") do |f|
* if f == nil
* puts "in Child"
* else
* puts "Got: #{f.gets}"
* end
* end
*
* <em>produces:</em>
*
* Got: in Child
*/
static VALUE
rb_f_open(int argc, VALUE *argv)
{
ID to_open = 0;
int redirect = Qfalse;
if (argc >= 1) {
CONST_ID(to_open, "to_open");
if (rb_respond_to(argv[0], to_open)) {
redirect = Qtrue;
}
else {
VALUE tmp = argv[0];
FilePathValue(tmp);
if (NIL_P(tmp)) {
redirect = Qtrue;
}
else {
char *str = StringValuePtr(tmp);
if (str && str[0] == '|') {
argv[0] = rb_str_new(str+1, RSTRING_LEN(tmp)-1);
OBJ_INFECT(argv[0], tmp);
return rb_io_s_popen(argc, argv, rb_cIO);
}
}
}
}
if (redirect) {
VALUE io = rb_funcall2(argv[0], to_open, argc-1, argv+1);
if (rb_block_given_p()) {
return rb_ensure(rb_yield, io, io_close, io);
}
return io;
}
return rb_io_s_open(argc, argv, rb_cFile);
}
static VALUE
rb_io_open(const char *fname, const char *mode)
{
if (fname[0] == '|') {
VALUE cmd = rb_str_new2(fname+1);
return pipe_open_s(cmd, mode);
}
else {
return rb_file_open(fname, mode);
}
}
static VALUE
rb_io_open_with_args(int argc, VALUE *argv)
{
const char *mode;
VALUE pname, pmode;
if (rb_scan_args(argc, argv, "11", &pname, &pmode) == 1) {
mode = "r";
}
else if (FIXNUM_P(pmode)) {
mode = rb_io_modenum_mode(FIX2INT(pmode));
}
else {
mode = StringValueCStr(pmode);
}
return rb_io_open(StringValueCStr(pname), mode);
}
static VALUE
io_reopen(VALUE io, VALUE nfile)
{
rb_io_t *fptr, *orig;
int fd, fd2;
off_t pos = 0;
nfile = rb_io_get_io(nfile);
if (rb_safe_level() >= 4 && (!OBJ_TAINTED(io) || !OBJ_TAINTED(nfile))) {
rb_raise(rb_eSecurityError, "Insecure: can't reopen");
}
GetOpenFile(io, fptr);
GetOpenFile(nfile, orig);
if (fptr == orig) return io;
#if !defined __CYGWIN__
if (IS_PREP_STDIO(fptr)) {
if ((fptr->stdio_file == stdin && !(orig->mode & FMODE_READABLE)) ||
(fptr->stdio_file == stdout && !(orig->mode & FMODE_WRITABLE)) ||
(fptr->stdio_file == stderr && !(orig->mode & FMODE_WRITABLE))) {
rb_raise(rb_eArgError,
"%s can't change access mode from \"%s\" to \"%s\"",
PREP_STDIO_NAME(fptr), rb_io_flags_mode(fptr->mode),
rb_io_flags_mode(orig->mode));
}
}
#endif
if (orig->mode & FMODE_READABLE) {
pos = io_tell(orig);
}
if (orig->mode & FMODE_WRITABLE) {
io_fflush(orig);
}
if (fptr->mode & FMODE_WRITABLE) {
io_fflush(fptr);
}
/* copy rb_io_t structure */
fptr->mode = orig->mode | (fptr->mode & FMODE_PREP);
fptr->pid = orig->pid;
fptr->lineno = orig->lineno;
if (fptr->path) free(fptr->path);
if (orig->path) fptr->path = strdup(orig->path);
else fptr->path = 0;
fptr->finalize = orig->finalize;
fd = fptr->fd;
fd2 = orig->fd;
if (fd != fd2) {
#if !defined __CYGWIN__
if (IS_PREP_STDIO(fptr)) {
/* need to keep stdio objects */
if (dup2(fd2, fd) < 0)
rb_sys_fail(orig->path);
}
else {
#endif
if (fptr->stdio_file)
fclose(fptr->stdio_file);
else
close(fptr->fd);
fptr->stdio_file = 0;
fptr->fd = -1;
if (dup2(fd2, fd) < 0)
rb_sys_fail(orig->path);
fptr->fd = fd;
#if !defined __CYGWIN__
}
#endif
rb_thread_fd_close(fd);
if ((orig->mode & FMODE_READABLE) && pos >= 0) {
if (io_seek(fptr, pos, SEEK_SET) < 0) {
rb_sys_fail(fptr->path);
}
if (io_seek(orig, pos, SEEK_SET) < 0) {
rb_sys_fail(orig->path);
}
}
}
if (fptr->mode & FMODE_BINMODE) {
rb_io_binmode(io);
}
RBASIC(io)->klass = RBASIC(nfile)->klass;
return io;
}
/*
* call-seq:
* ios.reopen(other_IO) => ios
* ios.reopen(path, mode_str) => ios
*
* Reassociates <em>ios</em> with the I/O stream given in
* <i>other_IO</i> or to a new stream opened on <i>path</i>. This may
* dynamically change the actual class of this stream.
*
* f1 = File.new("testfile")
* f2 = File.new("testfile")
* f2.readlines[0] #=> "This is line one\n"
* f2.reopen(f1) #=> #<File:testfile>
* f2.readlines[0] #=> "This is line one\n"
*/
static VALUE
rb_io_reopen(int argc, VALUE *argv, VALUE file)
{
VALUE fname, nmode;
const char *mode;
rb_io_t *fptr;
rb_secure(4);
if (rb_scan_args(argc, argv, "11", &fname, &nmode) == 1) {
VALUE tmp = rb_io_check_io(fname);
if (!NIL_P(tmp)) {
return io_reopen(file, tmp);
}
}
FilePathValue(fname);
rb_io_taint_check(file);
fptr = RFILE(file)->fptr;
if (!fptr) {
fptr = RFILE(file)->fptr = ALLOC(rb_io_t);
MEMZERO(fptr, rb_io_t, 1);
}
if (!NIL_P(nmode)) {
int flags = rb_io_mode_flags(StringValueCStr(nmode));
if (IS_PREP_STDIO(fptr) &&
((fptr->mode & FMODE_READWRITE) & (flags & FMODE_READWRITE)) !=
(fptr->mode & FMODE_READWRITE)) {
rb_raise(rb_eArgError,
"%s can't change access mode from \"%s\" to \"%s\"",
PREP_STDIO_NAME(fptr), rb_io_flags_mode(fptr->mode),
rb_io_flags_mode(flags));
}
fptr->mode = flags;
rb_io_mode_enc(fptr, StringValueCStr(nmode));
}
if (fptr->path) {
free(fptr->path);
fptr->path = 0;
}
fptr->path = strdup(StringValueCStr(fname));
mode = rb_io_flags_mode(fptr->mode);
if (fptr->fd < 0) {
fptr->fd = rb_sysopen(fptr->path, rb_io_mode_modenum(mode), 0666);
fptr->stdio_file = 0;
return file;
}
if (fptr->mode & FMODE_WRITABLE) {
io_fflush(fptr);
}
fptr->rbuf_off = fptr->rbuf_len = 0;
if (fptr->stdio_file) {
if (freopen(fptr->path, mode, fptr->stdio_file) == 0) {
rb_sys_fail(fptr->path);
}
fptr->fd = fileno(fptr->stdio_file);
#ifdef USE_SETVBUF
if (setvbuf(fptr->stdio_file, NULL, _IOFBF, 0) != 0)
rb_warn("setvbuf() can't be honoured for %s", fptr->path);
#endif
}
else {
if (close(fptr->fd) < 0)
rb_sys_fail(fptr->path);
fptr->fd = -1;
fptr->fd = rb_sysopen(fptr->path, rb_io_mode_modenum(mode), 0666);
}
return file;
}
/* :nodoc: */
static VALUE
rb_io_init_copy(VALUE dest, VALUE io)
{
rb_io_t *fptr, *orig;
int fd;
VALUE write_io;
io = rb_io_get_io(io);
if (dest == io) return dest;
GetOpenFile(io, orig);
MakeOpenFile(dest, fptr);
rb_io_flush(io);
/* copy rb_io_t structure */
fptr->mode = orig->mode & ~FMODE_PREP;
fptr->pid = orig->pid;
fptr->lineno = orig->lineno;
if (orig->path) fptr->path = strdup(orig->path);
fptr->finalize = orig->finalize;
fd = ruby_dup(orig->fd);
fptr->fd = fd;
io_seek(fptr, io_tell(orig), SEEK_SET);
if (fptr->mode & FMODE_BINMODE) {
rb_io_binmode(dest);
}
write_io = GetWriteIO(io);
if (io != write_io) {
write_io = rb_obj_dup(write_io);
fptr->tied_io_for_writing = write_io;
rb_ivar_set(dest, rb_intern("@tied_io_for_writing"), write_io);
}
return dest;
}
/*
* call-seq:
* ios.printf(format_string [, obj, ...] ) => nil
*
* Formats and writes to <em>ios</em>, converting parameters under
* control of the format string. See <code>Kernel#sprintf</code>
* for details.
*/
VALUE
rb_io_printf(int argc, VALUE *argv, VALUE out)
{
rb_io_write(out, rb_f_sprintf(argc, argv));
return Qnil;
}
/*
* call-seq:
* printf(io, string [, obj ... ] ) => nil
* printf(string [, obj ... ] ) => nil
*
* Equivalent to:
* io.write(sprintf(string, obj, ...)
* or
* $stdout.write(sprintf(string, obj, ...)
*/
static VALUE
rb_f_printf(int argc, VALUE *argv)
{
VALUE out;
if (argc == 0) return Qnil;
if (TYPE(argv[0]) == T_STRING) {
out = rb_stdout;
}
else {
out = argv[0];
argv++;
argc--;
}
rb_io_write(out, rb_f_sprintf(argc, argv));
return Qnil;
}
/*
* call-seq:
* ios.print() => nil
* ios.print(obj, ...) => nil
*
* Writes the given object(s) to <em>ios</em>. The stream must be
* opened for writing. If the output record separator (<code>$\\</code>)
* is not <code>nil</code>, it will be appended to the output. If no
* arguments are given, prints <code>$_</code>. Objects that aren't
* strings will be converted by calling their <code>to_s</code> method.
* With no argument, prints the contents of the variable <code>$_</code>.
* Returns <code>nil</code>.
*
* $stdout.print("This is ", 100, " percent.\n")
*
* <em>produces:</em>
*
* This is 100 percent.
*/
VALUE
rb_io_print(int argc, VALUE *argv, VALUE out)
{
int i;
VALUE line;
/* if no argument given, print `$_' */
if (argc == 0) {
argc = 1;
line = rb_lastline_get();
argv = &line;
}
for (i=0; i<argc; i++) {
rb_io_write(out, argv[i]);
if (!NIL_P(rb_output_fs)) {
rb_io_write(out, rb_output_fs);
}
}
if (argc > 0 && !NIL_P(rb_output_rs)) {
rb_io_write(out, rb_output_rs);
}
return Qnil;
}
/*
* call-seq:
* print(obj, ...) => nil
*
* Prints each object in turn to <code>$stdout</code>. If the output
* field separator (<code>$,</code>) is not +nil+, its
* contents will appear between each field. If the output record
* separator (<code>$\\</code>) is not +nil+, it will be
* appended to the output. If no arguments are given, prints
* <code>$_</code>. Objects that aren't strings will be converted by
* calling their <code>to_s</code> method.
*
* print "cat", [1,2,3], 99, "\n"
* $, = ", "
* $\ = "\n"
* print "cat", [1,2,3], 99
*
* <em>produces:</em>
*
* cat12399
* cat, 1, 2, 3, 99
*/
static VALUE
rb_f_print(int argc, VALUE *argv)
{
rb_io_print(argc, argv, rb_stdout);
return Qnil;
}
/*
* call-seq:
* ios.putc(obj) => obj
*
* If <i>obj</i> is <code>Numeric</code>, write the character whose
* code is <i>obj</i>, otherwise write the first character of the
* string representation of <i>obj</i> to <em>ios</em>.
*
* $stdout.putc "A"
* $stdout.putc 65
*
* <em>produces:</em>
*
* AA
*/
static VALUE
rb_io_putc(VALUE io, VALUE ch)
{
char c = NUM2CHR(ch);
rb_io_write(io, rb_str_new(&c, 1));
return ch;
}
/*
* call-seq:
* putc(int) => int
*
* Equivalent to:
*
* $stdout.putc(int)
*/
static VALUE
rb_f_putc(VALUE recv, VALUE ch)
{
if (recv == rb_stdout) {
return rb_io_putc(recv, ch);
}
return rb_funcall2(rb_stdout, rb_intern("putc"), 1, &ch);
}
static VALUE
io_puts_ary(VALUE ary, VALUE out, int recur)
{
VALUE tmp;
long i;
if (recur) {
tmp = rb_str_new2("[...]");
rb_io_puts(1, &tmp, out);
return Qnil;
}
for (i=0; i<RARRAY_LEN(ary); i++) {
tmp = RARRAY_PTR(ary)[i];
rb_io_puts(1, &tmp, out);
}
return Qnil;
}
/*
* call-seq:
* ios.puts(obj, ...) => nil
*
* Writes the given objects to <em>ios</em> as with
* <code>IO#print</code>. Writes a record separator (typically a
* newline) after any that do not already end with a newline sequence.
* If called with an array argument, writes each element on a new line.
* If called without arguments, outputs a single record separator.
*
* $stdout.puts("this", "is", "a", "test")
*
* <em>produces:</em>
*
* this
* is
* a
* test
*/
VALUE
rb_io_puts(int argc, VALUE *argv, VALUE out)
{
int i;
VALUE line;
/* if no argument given, print newline. */
if (argc == 0) {
rb_io_write(out, rb_default_rs);
return Qnil;
}
for (i=0; i<argc; i++) {
line = rb_check_array_type(argv[i]);
if (!NIL_P(line)) {
rb_exec_recursive(io_puts_ary, line, out);
continue;
}
line = rb_obj_as_string(argv[i]);
rb_io_write(out, line);
if (RSTRING_LEN(line) == 0 ||
RSTRING_PTR(line)[RSTRING_LEN(line)-1] != '\n') {
rb_io_write(out, rb_default_rs);
}
}
return Qnil;
}
/*
* call-seq:
* puts(obj, ...) => nil
*
* Equivalent to
*
* $stdout.puts(obj, ...)
*/
static VALUE
rb_f_puts(int argc, VALUE *argv, VALUE recv)
{
if (recv == rb_stdout) {
return rb_io_puts(argc, argv, recv);
}
return rb_funcall2(rb_stdout, rb_intern("puts"), argc, argv);
}
void
rb_p(VALUE obj) /* for debug print within C code */
{
VALUE str = rb_obj_as_string(rb_inspect(obj));
rb_str_buf_append(str, rb_default_rs);
rb_io_write(rb_stdout, str);
}
/*
* call-seq:
* p(obj) => obj
* p(obj1, obj2, ...) => [obj, ...]
* p() => nil
*
* For each object, directly writes
* _obj_.+inspect+ followed by the current output
* record separator to the program's standard output.
*
* S = Struct.new(:name, :state)
* s = S['dave', 'TX']
* p s
*
* <em>produces:</em>
*
* #<S name="dave", state="TX">
*/
static VALUE
rb_f_p(int argc, VALUE *argv, VALUE self)
{
int i;
VALUE ret = Qnil;
for (i=0; i<argc; i++) {
rb_p(argv[i]);
}
if (argc == 1) {
ret = argv[0];
}
else if (argc > 1) {
ret = rb_ary_new4(argc, argv);
}
if (TYPE(rb_stdout) == T_FILE) {
rb_io_flush(rb_stdout);
}
return ret;
}
/*
* call-seq:
* obj.display(port=$>) => nil
*
* Prints <i>obj</i> on the given port (default <code>$></code>).
* Equivalent to:
*
* def display(port=$>)
* port.write self
* end
*
* For example:
*
* 1.display
* "cat".display
* [ 4, 5, 6 ].display
* puts
*
* <em>produces:</em>
*
* 1cat456
*/
static VALUE
rb_obj_display(int argc, VALUE *argv, VALUE self)
{
VALUE out;
if (argc == 0) {
out = rb_stdout;
}
else {
rb_scan_args(argc, argv, "01", &out);
}
rb_io_write(out, self);
return Qnil;
}
void
rb_write_error2(const char *mesg, long len)
{
if (rb_stderr == orig_stderr || RFILE(orig_stderr)->fptr->fd < 0) {
fwrite(mesg, sizeof(char), len, stderr);
}
else {
rb_io_write(rb_stderr, rb_str_new(mesg, len));
}
}
void
rb_write_error(const char *mesg)
{
rb_write_error2(mesg, strlen(mesg));
}
static void
must_respond_to(ID mid, VALUE val, ID id)
{
if (!rb_respond_to(val, mid)) {
rb_raise(rb_eTypeError, "%s must have %s method, %s given",
rb_id2name(id), rb_id2name(mid),
rb_obj_classname(val));
}
}
static void
stdout_setter(VALUE val, ID id, VALUE *variable)
{
must_respond_to(id_write, val, id);
*variable = val;
}
static VALUE
prep_io(int fd, int mode, VALUE klass, const char *path)
{
rb_io_t *fp;
VALUE io = io_alloc(klass);
MakeOpenFile(io, fp);
fp->fd = fd;
#ifdef __CYGWIN__
if (!isatty(fd)) {
mode |= O_BINARY;
setmode(fd, O_BINARY);
}
#endif
fp->mode = mode;
io_check_tty(fp);
if (path) fp->path = strdup(path);
return io;
}
VALUE
rb_io_fdopen(int fd, int mode, const char *path)
{
VALUE klass = rb_cIO;
if (path && strcmp(path, "-")) klass = rb_cFile;
return prep_io(fd, rb_io_modenum_flags(mode), klass, path);
}
static VALUE
prep_stdio(FILE *f, int mode, VALUE klass, const char *path)
{
rb_io_t *fptr;
VALUE io = prep_io(fileno(f), mode|FMODE_PREP, klass, path);
GetOpenFile(io, fptr);
fptr->stdio_file = f;
return io;
}
FILE *
rb_io_stdio_file(rb_io_t *fptr)
{
if (!fptr->stdio_file) {
fptr->stdio_file = rb_fdopen(fptr->fd, rb_io_flags_mode(fptr->mode));
}
return fptr->stdio_file;
}
/*
* call-seq:
* IO.new(fd, mode) => io
*
* Returns a new <code>IO</code> object (a stream) for the given
* <code>IO</code> object or integer file descriptor and mode
* string. See also <code>IO#fileno</code> and
* <code>IO::for_fd</code>.
*
* puts IO.new($stdout).fileno # => 1
*
* a = IO.new(2,"w") # '2' is standard error
* $stderr.puts "Hello"
* a.puts "World"
*
* <em>produces:</em>
*
* Hello
* World
*/
static VALUE
rb_io_initialize(int argc, VALUE *argv, VALUE io)
{
VALUE fnum, mode, orig;
rb_io_t *fp, *ofp = NULL;
int fd, fmode, flags = O_RDONLY;
rb_secure(4);
rb_scan_args(argc, argv, "11", &fnum, &mode);
if (argc == 2) {
if (FIXNUM_P(mode)) {
flags = FIX2LONG(mode);
}
else {
SafeStringValue(mode);
flags = rb_io_mode_modenum(StringValueCStr(mode));
}
}
orig = rb_io_check_io(fnum);
if (NIL_P(orig)) {
fd = NUM2INT(fnum);
UPDATE_MAXFD(fd);
if (argc != 2) {
#if defined(HAVE_FCNTL) && defined(F_GETFL)
flags = fcntl(fd, F_GETFL);
if (flags == -1) rb_sys_fail(0);
#endif
}
MakeOpenFile(io, fp);
fp->fd = fd;
fp->mode = rb_io_modenum_flags(flags);
io_check_tty(fp);
}
else if (RFILE(io)->fptr) {
rb_raise(rb_eRuntimeError, "reinitializing IO");
}
else {
GetOpenFile(orig, ofp);
if (ofp->refcnt == LONG_MAX) {
VALUE s = rb_inspect(orig);
rb_raise(rb_eIOError, "too many shared IO for %s", StringValueCStr(s));
}
if (argc == 2) {
fmode = rb_io_modenum_flags(flags);
if ((ofp->mode ^ fmode) & (FMODE_READWRITE|FMODE_BINMODE)) {
if (FIXNUM_P(mode)) {
rb_raise(rb_eArgError, "incompatible mode 0%o", flags);
}
else {
rb_raise(rb_eArgError, "incompatible mode \"%s\"", RSTRING_PTR(mode));
}
}
}
ofp->refcnt++;
RFILE(io)->fptr = ofp;
}
return io;
}
/*
* call-seq:
* File.new(filename, mode="r") => file
* File.new(filename [, mode [, perm]]) => file
*
* Opens the file named by _filename_ according to
* _mode_ (default is ``r'') and returns a new
* <code>File</code> object. See the description of class +IO+ for
* a description of _mode_. The file mode may optionally be
* specified as a +Fixnum+ by _or_-ing together the
* flags (O_RDONLY etc, again described under +IO+). Optional
* permission bits may be given in _perm_. These mode and permission
* bits are platform dependent; on Unix systems, see
* <code>open(2)</code> for details.
*
* f = File.new("testfile", "r")
* f = File.new("newfile", "w+")
* f = File.new("newfile", File::CREAT|File::TRUNC|File::RDWR, 0644)
*/
static VALUE
rb_file_initialize(int argc, VALUE *argv, VALUE io)
{
if (RFILE(io)->fptr) {
rb_raise(rb_eRuntimeError, "reinitializing File");
}
if (0 < argc && argc < 3) {
VALUE fd = rb_check_convert_type(argv[0], T_FIXNUM, "Fixnum", "to_int");
if (!NIL_P(fd)) {
argv[0] = fd;
return rb_io_initialize(argc, argv, io);
}
}
rb_open_file(argc, argv, io);
return io;
}
/*
* call-seq:
* IO.new(fd, mode_string) => io
*
* Returns a new <code>IO</code> object (a stream) for the given
* integer file descriptor and mode string. See also
* <code>IO#fileno</code> and <code>IO::for_fd</code>.
*
* a = IO.new(2,"w") # '2' is standard error
* $stderr.puts "Hello"
* a.puts "World"
*
* <em>produces:</em>
*
* Hello
* World
*/
static VALUE
rb_io_s_new(int argc, VALUE *argv, VALUE klass)
{
if (rb_block_given_p()) {
const char *cname = rb_class2name(klass);
rb_warn("%s::new() does not take block; use %s::open() instead",
cname, cname);
}
return rb_class_new_instance(argc, argv, klass);
}
/*
* call-seq:
* IO.for_fd(fd, mode) => io
*
* Synonym for <code>IO::new</code>.
*
*/
static VALUE
rb_io_s_for_fd(int argc, VALUE *argv, VALUE klass)
{
VALUE io = rb_obj_alloc(klass);
rb_io_initialize(argc, argv, io);
return io;
}
static void
argf_mark(void *ptr)
{
struct argf *p = ptr;
rb_gc_mark(p->filename);
rb_gc_mark(p->current_file);
rb_gc_mark(p->lineno);
rb_gc_mark(p->argv);
}
static void
argf_free(void *ptr)
{
struct argf *p = ptr;
free(p->inplace);
}
static inline void
argf_init(struct argf *p, VALUE v)
{
p->filename = Qnil;
p->current_file = Qnil;
p->lineno = Qnil;
p->argv = v;
}
static VALUE
argf_alloc(VALUE klass)
{
struct argf *p;
VALUE argf = Data_Make_Struct(klass, struct argf, argf_mark, argf_free, p);
argf_init(p, Qnil);
return argf;
}
#undef rb_argv
#define filename ARGF.filename
#define current_file ARGF.current_file
#define gets_lineno ARGF.gets_lineno
#define init_p ARGF.init_p
#define next_p ARGF.next_p
#define lineno ARGF.lineno
#define ruby_inplace_mode ARGF.inplace
#define argf_binmode ARGF.binmode
#define argf_enc ARGF.enc
#define argf_enc2 ARGF.enc2
#define rb_argv ARGF.argv
static VALUE
argf_initialize(VALUE argf, VALUE argv)
{
memset(&ARGF, 0, sizeof(ARGF));
argf_init(&ARGF, argv);
return argf;
}
static VALUE
argf_initialize_copy(VALUE argf, VALUE orig)
{
ARGF = argf_of(orig);
rb_argv = rb_obj_dup(rb_argv);
if (ARGF.inplace) {
const char *inplace = ARGF.inplace;
ARGF.inplace = 0;
ARGF.inplace = ruby_strdup(inplace);
}
return argf;
}
static VALUE
argf_set_lineno(VALUE argf, VALUE val)
{
gets_lineno = NUM2INT(val);
lineno = INT2FIX(gets_lineno);
return Qnil;
}
static VALUE
argf_lineno(VALUE argf)
{
return lineno;
}
static VALUE
argf_forward(int argc, VALUE *argv, VALUE argf)
{
return rb_funcall3(current_file, rb_frame_this_func(), argc, argv);
}
#define next_argv() argf_next_argv(argf)
#define ARGF_GENERIC_INPUT_P() \
(current_file == rb_stdin && TYPE(current_file) != T_FILE)
#define ARGF_FORWARD(argc, argv) do {\
if (ARGF_GENERIC_INPUT_P())\
return argf_forward(argc, argv, argf);\
} while (0)
#define NEXT_ARGF_FORWARD(argc, argv) do {\
if (!next_argv()) return Qnil;\
ARGF_FORWARD(argc, argv);\
} while (0)
static void
argf_close(VALUE file)
{
rb_funcall3(file, rb_intern("close"), 0, 0);
}
static int
argf_next_argv(VALUE argf)
{
char *fn;
rb_io_t *fptr;
int stdout_binmode = 0;
if (TYPE(rb_stdout) == T_FILE) {
GetOpenFile(rb_stdout, fptr);
if (fptr->mode & FMODE_BINMODE)
stdout_binmode = 1;
}
if (init_p == 0) {
if (!NIL_P(rb_argv) && RARRAY_LEN(rb_argv) > 0) {
next_p = 1;
}
else {
next_p = -1;
}
init_p = 1;
gets_lineno = 0;
}
if (next_p == 1) {
next_p = 0;
retry:
if (RARRAY_LEN(rb_argv) > 0) {
filename = rb_ary_shift(rb_argv);
fn = StringValueCStr(filename);
if (strlen(fn) == 1 && fn[0] == '-') {
current_file = rb_stdin;
if (ruby_inplace_mode) {
rb_warn("Can't do inplace edit for stdio; skipping");
goto retry;
}
}
else {
int fr = rb_sysopen(fn, O_RDONLY, 0);
if (ruby_inplace_mode) {
struct stat st;
#ifndef NO_SAFE_RENAME
struct stat st2;
#endif
VALUE str;
int fw;
if (TYPE(rb_stdout) == T_FILE && rb_stdout != orig_stdout) {
rb_io_close(rb_stdout);
}
fstat(fr, &st);
if (*ruby_inplace_mode) {
str = rb_str_new2(fn);
#ifdef NO_LONG_FNAME
ruby_add_suffix(str, ruby_inplace_mode);
#else
rb_str_cat2(str, ruby_inplace_mode);
#endif
#ifdef NO_SAFE_RENAME
(void)close(fr);
(void)unlink(RSTRING_PTR(str));
(void)rename(fn, RSTRING_PTR(str));
fr = rb_sysopen(RSTRING_PTR(str), O_RDONLY, 0);
#else
if (rename(fn, RSTRING_PTR(str)) < 0) {
rb_warn("Can't rename %s to %s: %s, skipping file",
fn, RSTRING_PTR(str), strerror(errno));
close(fr);
goto retry;
}
#endif
}
else {
#ifdef NO_SAFE_RENAME
rb_fatal("Can't do inplace edit without backup");
#else
if (unlink(fn) < 0) {
rb_warn("Can't remove %s: %s, skipping file",
fn, strerror(errno));
close(fr);
goto retry;
}
#endif
}
fw = rb_sysopen(fn, O_WRONLY|O_CREAT|O_TRUNC, 0666);
#ifndef NO_SAFE_RENAME
fstat(fw, &st2);
#ifdef HAVE_FCHMOD
fchmod(fw, st.st_mode);
#else
chmod(fn, st.st_mode);
#endif
if (st.st_uid!=st2.st_uid || st.st_gid!=st2.st_gid) {
fchown(fw, st.st_uid, st.st_gid);
}
#endif
rb_stdout = prep_io(fw, FMODE_WRITABLE, rb_cFile, fn);
if (stdout_binmode) rb_io_binmode(rb_stdout);
}
current_file = prep_io(fr, FMODE_READABLE, rb_cFile, fn);
}
if (argf_binmode) rb_io_binmode(current_file);
if (argf_enc) {
rb_io_t *fptr;
GetOpenFile(current_file, fptr);
fptr->enc = argf_enc;
fptr->enc2 = argf_enc2;
}
}
else {
next_p = 1;
return Qfalse;
}
}
else if (next_p == -1) {
current_file = rb_stdin;
filename = rb_str_new2("-");
if (ruby_inplace_mode) {
rb_warn("Can't do inplace edit for stdio");
rb_stdout = orig_stdout;
}
}
return Qtrue;
}
static VALUE
argf_getline(int argc, VALUE *argv, VALUE argf)
{
VALUE line;
retry:
if (!next_argv()) return Qnil;
if (ARGF_GENERIC_INPUT_P()) {
line = rb_funcall3(current_file, rb_intern("gets"), argc, argv);
}
else {
if (argc == 0 && rb_rs == rb_default_rs) {
line = rb_io_gets(current_file);
}
else {
line = rb_io_getline(argc, argv, current_file);
}
if (NIL_P(line) && next_p != -1) {
argf_close(current_file);
next_p = 1;
goto retry;
}
}
if (!NIL_P(line)) {
gets_lineno++;
lineno = INT2FIX(gets_lineno);
}
return line;
}
static VALUE
argf_lineno_getter(ID id, VALUE *var)
{
VALUE argf = *var;
return lineno;
}
static void
argf_lineno_setter(VALUE val, ID id, VALUE *var)
{
VALUE argf = *var;
int n = NUM2INT(val);
gets_lineno = n;
lineno = INT2FIX(n);
}
static VALUE argf_gets(int, VALUE *, VALUE);
/*
* call-seq:
* gets(sep=$/) => string or nil
* gets(limit) => string or nil
* gets(sep,limit) => string or nil
*
* Returns (and assigns to <code>$_</code>) the next line from the list
* of files in +ARGV+ (or <code>$*</code>), or from standard input if
* no files are present on the command line. Returns +nil+ at end of
* file. The optional argument specifies the record separator. The
* separator is included with the contents of each record. A separator
* of +nil+ reads the entire contents, and a zero-length separator
* reads the input one paragraph at a time, where paragraphs are
* divided by two consecutive newlines. If the first argument is an
* integer, or optional second argument is given, the returning string
* would not be longer than the given value. If multiple filenames are
* present in +ARGV+, +gets(nil)+ will read the contents one file at a
* time.
*
* ARGV << "testfile"
* print while gets
*
* <em>produces:</em>
*
* This is line one
* This is line two
* This is line three
* And so on...
*
* The style of programming using <code>$_</code> as an implicit
* parameter is gradually losing favor in the Ruby community.
*/
static VALUE
rb_f_gets(int argc, VALUE *argv, VALUE recv)
{
if (recv == argf) {
return argf_gets(argc, argv, argf);
}
return rb_funcall2(argf, rb_intern("gets"), argc, argv);
}
static VALUE
argf_gets(int argc, VALUE *argv, VALUE argf)
{
VALUE line;
line = argf_getline(argc, argv, argf);
rb_lastline_set(line);
return line;
}
VALUE
rb_gets(void)
{
VALUE line;
if (rb_rs != rb_default_rs) {
return rb_f_gets(0, 0, argf);
}
retry:
if (!next_argv()) return Qnil;
line = rb_io_gets(current_file);
if (NIL_P(line) && next_p != -1) {
rb_io_close(current_file);
next_p = 1;
goto retry;
}
rb_lastline_set(line);
if (!NIL_P(line)) {
gets_lineno++;
lineno = INT2FIX(gets_lineno);
}
return line;
}
static VALUE argf_readline(int, VALUE *, VALUE);
/*
* call-seq:
* readline(sep=$/) => string
* readline(limit) => string
* readline(sep, limit) => string
*
* Equivalent to <code>Kernel::gets</code>, except
* +readline+ raises +EOFError+ at end of file.
*/
static VALUE
rb_f_readline(int argc, VALUE *argv, VALUE recv)
{
if (recv == argf) {
return argf_readline(argc, argv, argf);
}
return rb_funcall2(argf, rb_intern("readline"), argc, argv);
}
static VALUE
argf_readline(int argc, VALUE *argv, VALUE argf)
{
VALUE line;
if (!next_argv()) rb_eof_error();
ARGF_FORWARD(argc, argv);
line = argf_gets(argc, argv, argf);
if (NIL_P(line)) {
rb_eof_error();
}
return line;
}
static VALUE argf_readlines(int, VALUE *, VALUE);
/*
* call-seq:
* readlines(sep=$/) => array
* readlines(limit) => array
* readlines(sep,limit) => array
*
* Returns an array containing the lines returned by calling
* <code>Kernel.gets(<i>sep</i>)</code> until the end of file.
*/
static VALUE
rb_f_readlines(int argc, VALUE *argv, VALUE recv)
{
if (recv == argf) {
return argf_readlines(argc, argv, argf);
}
return rb_funcall2(argf, rb_intern("readlines"), argc, argv);
}
static VALUE
argf_readlines(int argc, VALUE *argv, VALUE argf)
{
VALUE line, ary;
ary = rb_ary_new();
while (!NIL_P(line = argf_getline(argc, argv, argf))) {
rb_ary_push(ary, line);
}
return ary;
}
/*
* call-seq:
* `cmd` => string
*
* Returns the standard output of running _cmd_ in a subshell.
* The built-in syntax <code>%x{...}</code> uses
* this method. Sets <code>$?</code> to the process status.
*
* `date` #=> "Wed Apr 9 08:56:30 CDT 2003\n"
* `ls testdir`.split[1] #=> "main.rb"
* `echo oops && exit 99` #=> "oops\n"
* $?.exitstatus #=> 99
*/
static VALUE
rb_f_backquote(VALUE obj, VALUE str)
{
volatile VALUE port;
VALUE result;
rb_io_t *fptr;
SafeStringValue(str);
port = pipe_open_s(str, "r");
if (NIL_P(port)) return rb_str_new(0,0);
GetOpenFile(port, fptr);
result = read_all(fptr, remain_size(fptr), Qnil);
rb_io_close(port);
return result;
}
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
static VALUE
select_internal(VALUE read, VALUE write, VALUE except, struct timeval *tp, rb_fdset_t *fds)
{
VALUE res, list;
fd_set *rp, *wp, *ep;
rb_io_t *fptr;
long i;
int max = 0, n;
int interrupt_flag = 0;
int pending = 0;
struct timeval timerec;
if (!NIL_P(read)) {
Check_Type(read, T_ARRAY);
for (i=0; i<RARRAY_LEN(read); i++) {
GetOpenFile(rb_io_get_io(RARRAY_PTR(read)[i]), fptr);
rb_fd_set(fptr->fd, &fds[0]);
if (READ_DATA_PENDING(fptr)) { /* check for buffered data */
pending++;
rb_fd_set(fptr->fd, &fds[3]);
}
if (max < fptr->fd) max = fptr->fd;
}
if (pending) { /* no blocking if there's buffered data */
timerec.tv_sec = timerec.tv_usec = 0;
tp = &timerec;
}
rp = rb_fd_ptr(&fds[0]);
}
else
rp = 0;
if (!NIL_P(write)) {
Check_Type(write, T_ARRAY);
for (i=0; i<RARRAY_LEN(write); i++) {
VALUE write_io = GetWriteIO(rb_io_get_io(RARRAY_PTR(write)[i]));
GetOpenFile(write_io, fptr);
rb_fd_set(fptr->fd, &fds[1]);
if (max < fptr->fd) max = fptr->fd;
}
wp = rb_fd_ptr(&fds[1]);
}
else
wp = 0;
if (!NIL_P(except)) {
Check_Type(except, T_ARRAY);
for (i=0; i<RARRAY_LEN(except); i++) {
VALUE io = rb_io_get_io(RARRAY_PTR(except)[i]);
VALUE write_io = GetWriteIO(io);
GetOpenFile(io, fptr);
rb_fd_set(fptr->fd, &fds[2]);
if (max < fptr->fd) max = fptr->fd;
if (io != write_io) {
GetOpenFile(write_io, fptr);
rb_fd_set(fptr->fd, &fds[2]);
if (max < fptr->fd) max = fptr->fd;
}
}
ep = rb_fd_ptr(&fds[2]);
}
else {
ep = 0;
}
max++;
n = rb_thread_select(max, rp, wp, ep, tp);
if (n < 0) {
rb_sys_fail(0);
}
if (!pending && n == 0) return Qnil; /* returns nil on timeout */
res = rb_ary_new2(3);
rb_ary_push(res, rp?rb_ary_new():rb_ary_new2(0));
rb_ary_push(res, wp?rb_ary_new():rb_ary_new2(0));
rb_ary_push(res, ep?rb_ary_new():rb_ary_new2(0));
if (interrupt_flag == 0) {
if (rp) {
list = RARRAY_PTR(res)[0];
for (i=0; i< RARRAY_LEN(read); i++) {
VALUE obj = rb_ary_entry(read, i);
VALUE io = rb_io_get_io(obj);
GetOpenFile(io, fptr);
if (rb_fd_isset(fptr->fd, &fds[0]) ||
rb_fd_isset(fptr->fd, &fds[3])) {
rb_ary_push(list, obj);
}
}
}
if (wp) {
list = RARRAY_PTR(res)[1];
for (i=0; i< RARRAY_LEN(write); i++) {
VALUE obj = rb_ary_entry(write, i);
VALUE io = rb_io_get_io(obj);
VALUE write_io = GetWriteIO(io);
GetOpenFile(write_io, fptr);
if (rb_fd_isset(fptr->fd, &fds[1])) {
rb_ary_push(list, obj);
}
}
}
if (ep) {
list = RARRAY_PTR(res)[2];
for (i=0; i< RARRAY_LEN(except); i++) {
VALUE obj = rb_ary_entry(except, i);
VALUE io = rb_io_get_io(obj);
VALUE write_io = GetWriteIO(io);
GetOpenFile(io, fptr);
if (rb_fd_isset(fptr->fd, &fds[2])) {
rb_ary_push(list, obj);
}
else if (io != write_io) {
GetOpenFile(write_io, fptr);
if (rb_fd_isset(fptr->fd, &fds[2])) {
rb_ary_push(list, obj);
}
}
}
}
}
return res; /* returns an empty array on interrupt */
}
struct select_args {
VALUE read, write, except;
struct timeval *timeout;
rb_fdset_t fdsets[4];
};
#ifdef HAVE_RB_FD_INIT
static VALUE
select_call(VALUE arg)
{
struct select_args *p = (struct select_args *)arg;
return select_internal(p->read, p->write, p->except, p->timeout, p->fdsets);
}
static VALUE
select_end(VALUE arg)
{
struct select_args *p = (struct select_args *)arg;
int i;
for (i = 0; i < sizeof(p->fdsets) / sizeof(p->fdsets[0]); ++i)
rb_fd_term(&p->fdsets[i]);
return Qnil;
}
#endif
/*
* call-seq:
* IO.select(read_array
* [, write_array
* [, error_array
* [, timeout]]] ) => array or nil
*
* See <code>Kernel#select</code>.
*/
static VALUE
rb_f_select(int argc, VALUE *argv, VALUE obj)
{
VALUE timeout;
struct select_args args;
struct timeval timerec;
int i;
rb_scan_args(argc, argv, "13", &args.read, &args.write, &args.except, &timeout);
if (NIL_P(timeout)) {
args.timeout = 0;
}
else {
timerec = rb_time_interval(timeout);
args.timeout = &timerec;
}
for (i = 0; i < sizeof(args.fdsets) / sizeof(args.fdsets[0]); ++i)
rb_fd_init(&args.fdsets[i]);
#ifdef HAVE_RB_FD_INIT
return rb_ensure(select_call, (VALUE)&args, select_end, (VALUE)&args);
#else
return select_internal(args.read, args.write, args.except,
args.timeout, args.fdsets);
#endif
}
#if !defined(MSDOS) && !defined(__human68k__)
static int
io_cntl(int fd, int cmd, long narg, int io_p)
{
int retval;
#ifdef HAVE_FCNTL
TRAP_BEG;
# if defined(__CYGWIN__)
retval = io_p?ioctl(fd, cmd, (void*)narg):fcntl(fd, cmd, narg);
# else
retval = io_p?ioctl(fd, cmd, narg):fcntl(fd, cmd, narg);
# endif
TRAP_END;
#else
if (!io_p) {
rb_notimplement();
}
TRAP_BEG;
retval = ioctl(fd, cmd, narg);
TRAP_END;
#endif
return retval;
}
#endif
static VALUE
rb_io_ctl(VALUE io, VALUE req, VALUE arg, int io_p)
{
#if !defined(MSDOS) && !defined(__human68k__)
int cmd = NUM2ULONG(req);
rb_io_t *fptr;
long len = 0;
long narg = 0;
int retval;
rb_secure(2);
if (NIL_P(arg) || arg == Qfalse) {
narg = 0;
}
else if (FIXNUM_P(arg)) {
narg = FIX2LONG(arg);
}
else if (arg == Qtrue) {
narg = 1;
}
else {
VALUE tmp = rb_check_string_type(arg);
if (NIL_P(tmp)) {
narg = NUM2LONG(arg);
}
else {
arg = tmp;
#ifdef IOCPARM_MASK
#ifndef IOCPARM_LEN
#define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
#endif
#endif
#ifdef IOCPARM_LEN
len = IOCPARM_LEN(cmd); /* on BSDish systems we're safe */
#else
len = 256; /* otherwise guess at what's safe */
#endif
rb_str_modify(arg);
if (len <= RSTRING_LEN(arg)) {
len = RSTRING_LEN(arg);
}
if (RSTRING_LEN(arg) < len) {
rb_str_resize(arg, len+1);
}
RSTRING_PTR(arg)[len] = 17; /* a little sanity check here */
narg = (long)RSTRING_PTR(arg);
}
}
GetOpenFile(io, fptr);
retval = io_cntl(fptr->fd, cmd, narg, io_p);
if (retval < 0) rb_sys_fail(fptr->path);
if (TYPE(arg) == T_STRING && RSTRING_PTR(arg)[len] != 17) {
rb_raise(rb_eArgError, "return value overflowed string");
}
if (!io_p && cmd == F_SETFL) {
if (narg & O_NONBLOCK) {
fptr->mode |= FMODE_WSPLIT_INITIALIZED;
fptr->mode &= ~FMODE_WSPLIT;
}
else {
fptr->mode &= ~(FMODE_WSPLIT_INITIALIZED|FMODE_WSPLIT);
}
}
return INT2NUM(retval);
#else
rb_notimplement();
return Qnil; /* not reached */
#endif
}
/*
* call-seq:
* ios.ioctl(integer_cmd, arg) => integer
*
* Provides a mechanism for issuing low-level commands to control or
* query I/O devices. Arguments and results are platform dependent. If
* <i>arg</i> is a number, its value is passed directly. If it is a
* string, it is interpreted as a binary sequence of bytes. On Unix
* platforms, see <code>ioctl(2)</code> for details. Not implemented on
* all platforms.
*/
static VALUE
rb_io_ioctl(int argc, VALUE *argv, VALUE io)
{
VALUE req, arg;
rb_scan_args(argc, argv, "11", &req, &arg);
return rb_io_ctl(io, req, arg, 1);
}
/*
* call-seq:
* ios.fcntl(integer_cmd, arg) => integer
*
* Provides a mechanism for issuing low-level commands to control or
* query file-oriented I/O streams. Arguments and results are platform
* dependent. If <i>arg</i> is a number, its value is passed
* directly. If it is a string, it is interpreted as a binary sequence
* of bytes (<code>Array#pack</code> might be a useful way to build this
* string). On Unix platforms, see <code>fcntl(2)</code> for details.
* Not implemented on all platforms.
*/
static VALUE
rb_io_fcntl(int argc, VALUE *argv, VALUE io)
{
#ifdef HAVE_FCNTL
VALUE req, arg;
rb_scan_args(argc, argv, "11", &req, &arg);
return rb_io_ctl(io, req, arg, 0);
#else
rb_notimplement();
return Qnil; /* not reached */
#endif
}
/*
* call-seq:
* syscall(fixnum [, args...]) => integer
*
* Calls the operating system function identified by _fixnum_,
* passing in the arguments, which must be either +String+
* objects, or +Integer+ objects that ultimately fit within
* a native +long+. Up to nine parameters may be passed (14
* on the Atari-ST). The function identified by _fixnum_ is system
* dependent. On some Unix systems, the numbers may be obtained from a
* header file called <code>syscall.h</code>.
*
* syscall 4, 1, "hello\n", 6 # '4' is write(2) on our box
*
* <em>produces:</em>
*
* hello
*/
static VALUE
rb_f_syscall(int argc, VALUE *argv)
{
#if defined(HAVE_SYSCALL) && !defined(__CHECKER__)
#ifdef atarist
unsigned long arg[14]; /* yes, we really need that many ! */
#else
unsigned long arg[8];
#endif
int retval = -1;
int i = 1;
int items = argc - 1;
/* This probably won't work on machines where sizeof(long) != sizeof(int)
* or where sizeof(long) != sizeof(char*). But such machines will
* not likely have syscall implemented either, so who cares?
*/
rb_secure(2);
if (argc == 0)
rb_raise(rb_eArgError, "too few arguments for syscall");
if (argc > sizeof(arg) / sizeof(arg[0]))
rb_raise(rb_eArgError, "too many arguments for syscall");
arg[0] = NUM2LONG(argv[0]); argv++;
while (items--) {
VALUE v = rb_check_string_type(*argv);
if (!NIL_P(v)) {
StringValue(v);
rb_str_modify(v);
arg[i] = (unsigned long)StringValueCStr(v);
}
else {
arg[i] = (unsigned long)NUM2LONG(*argv);
}
argv++;
i++;
}
TRAP_BEG;
switch (argc) {
case 1:
retval = syscall(arg[0]);
break;
case 2:
retval = syscall(arg[0],arg[1]);
break;
case 3:
retval = syscall(arg[0],arg[1],arg[2]);
break;
case 4:
retval = syscall(arg[0],arg[1],arg[2],arg[3]);
break;
case 5:
retval = syscall(arg[0],arg[1],arg[2],arg[3],arg[4]);
break;
case 6:
retval = syscall(arg[0],arg[1],arg[2],arg[3],arg[4],arg[5]);
break;
case 7:
retval = syscall(arg[0],arg[1],arg[2],arg[3],arg[4],arg[5],arg[6]);
break;
case 8:
retval = syscall(arg[0],arg[1],arg[2],arg[3],arg[4],arg[5],arg[6],
arg[7]);
break;
#ifdef atarist
case 9:
retval = syscall(arg[0],arg[1],arg[2],arg[3],arg[4],arg[5],arg[6],
arg[7], arg[8]);
break;
case 10:
retval = syscall(arg[0],arg[1],arg[2],arg[3],arg[4],arg[5],arg[6],
arg[7], arg[8], arg[9]);
break;
case 11:
retval = syscall(arg[0],arg[1],arg[2],arg[3],arg[4],arg[5],arg[6],
arg[7], arg[8], arg[9], arg[10]);
break;
case 12:
retval = syscall(arg[0],arg[1],arg[2],arg[3],arg[4],arg[5],arg[6],
arg[7], arg[8], arg[9], arg[10], arg[11]);
break;
case 13:
retval = syscall(arg[0],arg[1],arg[2],arg[3],arg[4],arg[5],arg[6],
arg[7], arg[8], arg[9], arg[10], arg[11], arg[12]);
break;
case 14:
retval = syscall(arg[0],arg[1],arg[2],arg[3],arg[4],arg[5],arg[6],
arg[7], arg[8], arg[9], arg[10], arg[11], arg[12], arg[13]);
break;
#endif /* atarist */
}
TRAP_END;
if (retval < 0) rb_sys_fail(0);
return INT2NUM(retval);
#else
rb_notimplement();
return Qnil; /* not reached */
#endif
}
static VALUE
io_new_instance(VALUE args)
{
return rb_class_new_instance(2, (VALUE*)args+1, *(VALUE*)args);
}
static void
io_encoding_set(rb_io_t *fptr, int argc, VALUE v1, VALUE v2)
{
if (NIL_P(v2)) argc = 1;
if (argc == 2) {
fptr->enc2 = rb_to_encoding(v1);
fptr->enc = rb_to_encoding(v2);
}
else if (argc == 1) {
if (NIL_P(v1)) {
fptr->enc = 0;
}
else {
VALUE tmp = rb_check_string_type(v1);
if (!NIL_P(tmp)) {
mode_enc(fptr, StringValueCStr(tmp));
}
else {
fptr->enc = rb_to_encoding(v1);
}
}
}
}
/*
* call-seq:
* IO.pipe -> [read_io, write_io]
* IO.pipe(ext_enc) -> [read_io, write_io]
* IO.pipe("ext_enc:int_enc") -> [read_io, write_io]
* IO.pipe(ext_enc, int_enc) -> [read_io, write_io]
*
* Creates a pair of pipe endpoints (connected to each other) and
* returns them as a two-element array of <code>IO</code> objects:
* <code>[</code> <i>read_io</i>, <i>write_io</i> <code>]</code>. Not
* available on all platforms.
*
* If an encoding (encoding name or encoding object) is specified as an optional argument,
* read string from pipe is tagged with the encoding specified.
* If the argument is a colon separated two encoding names "A:B",
* the read string is converted from encoding A (external encoding)
* to encoding B (internal encoding), then tagged with B.
* If two optional arguments are specified, those must be
* encoding objects or encoding names,
* and the first one is the external encoding,
* and the second one is the internal encoding.
*
* In the example below, the two processes close the ends of the pipe
* that they are not using. This is not just a cosmetic nicety. The
* read end of a pipe will not generate an end of file condition if
* there are any writers with the pipe still open. In the case of the
* parent process, the <code>rd.read</code> will never return if it
* does not first issue a <code>wr.close</code>.
*
* rd, wr = IO.pipe
*
* if fork
* wr.close
* puts "Parent got: <#{rd.read}>"
* rd.close
* Process.wait
* else
* rd.close
* puts "Sending message to parent"
* wr.write "Hi Dad"
* wr.close
* end
*
* <em>produces:</em>
*
* Sending message to parent
* Parent got: <Hi Dad>
*/
static VALUE
rb_io_s_pipe(int argc, VALUE *argv, VALUE klass)
{
#ifdef __human68k__
rb_notimplement();
return Qnil; /* not reached */
#else
int pipes[2], state;
VALUE r, w, args[3], v1, v2;
rb_io_t *fptr;
rb_scan_args(argc, argv, "02", &v1, &v2);
if (pipe(pipes) == -1)
rb_sys_fail(0);
UPDATE_MAXFD_PIPE(pipes);
args[0] = klass;
args[1] = INT2NUM(pipes[0]);
args[2] = INT2FIX(O_RDONLY);
r = rb_protect(io_new_instance, (VALUE)args, &state);
if (state) {
close(pipes[0]);
close(pipes[1]);
rb_jump_tag(state);
}
GetOpenFile(r, fptr);
io_encoding_set(fptr, argc, v1, v2);
args[1] = INT2NUM(pipes[1]);
args[2] = INT2FIX(O_WRONLY);
w = rb_protect(io_new_instance, (VALUE)args, &state);
if (state) {
close(pipes[1]);
if (!NIL_P(r)) rb_io_close(r);
rb_jump_tag(state);
}
rb_io_synchronized(RFILE(w)->fptr);
return rb_assoc_new(r, w);
#endif
}
struct foreach_arg {
int argc;
VALUE *argv;
VALUE io;
};
static void
open_key_args(int argc, VALUE *argv, struct foreach_arg *arg)
{
VALUE opt, v;
FilePathValue(argv[0]);
arg->io = 0;
arg->argc = argc > 1 ? 1 : 0;
arg->argv = argv + 1;
if (argc == 1) {
no_key:
arg->io = rb_io_open(RSTRING_PTR(argv[0]), "r");
return;
}
opt = rb_check_convert_type(argv[argc-1], T_HASH, "Hash", "to_hash");
if (NIL_P(opt)) goto no_key;
if (argc > 2) arg->argc = 1;
else arg->argc = 0;
v = rb_hash_aref(opt, sym_open_args);
if (!NIL_P(v)) {
VALUE args;
v = rb_convert_type(v, T_ARRAY, "Array", "to_ary");
args = rb_ary_new2(RARRAY_LEN(v)+1);
rb_ary_push(args, argv[0]);
rb_ary_concat(args, v);
MEMCPY(RARRAY_PTR(args)+1, RARRAY_PTR(v), VALUE, RARRAY_LEN(v));
arg->io = rb_io_open_with_args(RARRAY_LEN(args), RARRAY_PTR(args));
return;
}
v = rb_hash_aref(opt, sym_mode);
if (!NIL_P(v)) {
arg->io = rb_io_open(RSTRING_PTR(argv[0]), StringValueCStr(v));
}
else {
arg->io = rb_io_open(RSTRING_PTR(argv[0]), "r");
}
io_set_encoding(arg->io, opt);
}
static VALUE
io_s_foreach(struct foreach_arg *arg)
{
VALUE str;
while (!NIL_P(str = rb_io_gets_m(arg->argc, arg->argv, arg->io))) {
rb_yield(str);
}
return Qnil;
}
/*
* call-seq:
* IO.foreach(name, sep=$/) {|line| block } => nil
* IO.foreach(name, limit) {|line| block } => nil
* IO.foreach(name, sep, limit) {|line| block } => nil
*
* Executes the block for every line in the named I/O port, where lines
* are separated by <em>sep</em>.
*
* IO.foreach("testfile") {|x| print "GOT ", x }
*
* <em>produces:</em>
*
* GOT This is line one
* GOT This is line two
* GOT This is line three
* GOT And so on...
*
* If the last argument is a hash, it's the keyword argument to open.
* See <code>IO.read</code> for detail.
*
*/
static VALUE
rb_io_s_foreach(int argc, VALUE *argv, VALUE self)
{
struct foreach_arg arg;
rb_scan_args(argc, argv, "13", NULL, NULL, NULL, NULL);
RETURN_ENUMERATOR(self, argc, argv);
open_key_args(argc, argv, &arg);
if (NIL_P(arg.io)) return Qnil;
return rb_ensure(io_s_foreach, (VALUE)&arg, rb_io_close, arg.io);
}
static VALUE
io_s_readlines(struct foreach_arg *arg)
{
return rb_io_readlines(arg->argc, arg->argv, arg->io);
}
/*
* call-seq:
* IO.readlines(name, sep=$/) => array
* IO.readlines(name, limit) => array
* IO.readlines(name, sep, limit) => array
*
* Reads the entire file specified by <i>name</i> as individual
* lines, and returns those lines in an array. Lines are separated by
* <i>sep</i>.
*
* a = IO.readlines("testfile")
* a[0] #=> "This is line one\n"
*
* If the last argument is a hash, it's the keyword argument to open.
* See <code>IO.read</code> for detail.
*
*/
static VALUE
rb_io_s_readlines(int argc, VALUE *argv, VALUE io)
{
struct foreach_arg arg;
rb_scan_args(argc, argv, "13", NULL, NULL, NULL, NULL);
open_key_args(argc, argv, &arg);
if (NIL_P(arg.io)) return Qnil;
return rb_ensure(io_s_readlines, (VALUE)&arg, rb_io_close, arg.io);
}
static VALUE
io_s_read(struct foreach_arg *arg)
{
return io_read(arg->argc, arg->argv, arg->io);
}
/*
* call-seq:
* IO.read(name, [length [, offset]] ) => string
* IO.read(name, [length [, offset]], opt) => string
*
* Opens the file, optionally seeks to the given offset, then returns
* <i>length</i> bytes (defaulting to the rest of the file).
* <code>read</code> ensures the file is closed before returning.
*
* If the last argument is a hash, it specifies option for internal
* open(). The key would be the following. open_args: is exclusive
* to others.
*
* encoding: string or encoding
*
* specifies encoding of the read string. encoding will be ignored
* if length is specified.
*
* mode: string
*
* specifies mode argument for open(). it should start with "r"
* otherwise it would cause error.
*
* open_args: array of strings
*
* specifies arguments for open() as an array.
*
* IO.read("testfile") #=> "This is line one\nThis is line two\nThis is line three\nAnd so on...\n"
* IO.read("testfile", 20) #=> "This is line one\nThi"
* IO.read("testfile", 20, 10) #=> "ne one\nThis is line "
*/
static VALUE
rb_io_s_read(int argc, VALUE *argv, VALUE io)
{
VALUE offset;
struct foreach_arg arg;
rb_scan_args(argc, argv, "13", NULL, NULL, &offset, NULL);
open_key_args(argc, argv, &arg);
if (NIL_P(arg.io)) return Qnil;
if (!NIL_P(offset)) {
rb_io_binmode(arg.io);
rb_io_seek(arg.io, offset, SEEK_SET);
if (arg.argc == 2) arg.argc = 1;
}
return rb_ensure(io_s_read, (VALUE)&arg, rb_io_close, arg.io);
}
struct copy_stream_struct {
VALUE src;
VALUE dst;
off_t copy_length; /* (off_t)-1 if not specified */
off_t src_offset; /* (off_t)-1 if not specified */
int src_fd;
int dst_fd;
int close_src;
int close_dst;
off_t total;
const char *syserr;
int error_no;
const char *notimp;
rb_fdset_t fds;
rb_thread_t *th;
};
static int
copy_stream_wait_read(struct copy_stream_struct *stp)
{
int ret;
rb_fd_zero(&stp->fds);
rb_fd_set(stp->src_fd, &stp->fds);
ret = rb_fd_select(rb_fd_max(&stp->fds), &stp->fds, NULL, NULL, NULL);
if (ret == -1) {
stp->syserr = "select";
stp->error_no = errno;
return -1;
}
return 0;
}
static int
copy_stream_wait_write(struct copy_stream_struct *stp)
{
int ret;
rb_fd_zero(&stp->fds);
rb_fd_set(stp->dst_fd, &stp->fds);
ret = rb_fd_select(rb_fd_max(&stp->fds), NULL, &stp->fds, NULL, NULL);
if (ret == -1) {
stp->syserr = "select";
stp->error_no = errno;
return -1;
}
return 0;
}
#ifdef HAVE_SENDFILE
#ifdef __linux__
#define USE_SENDFILE
#ifdef HAVE_SYS_SENDFILE_H
#include <sys/sendfile.h>
#endif
static ssize_t
simple_sendfile(int out_fd, int in_fd, off_t *offset, size_t count)
{
return sendfile(out_fd, in_fd, offset, count);
}
#endif
#endif
#ifdef USE_SENDFILE
static int
copy_stream_sendfile(struct copy_stream_struct *stp)
{
struct stat src_stat, dst_stat;
ssize_t ss;
int ret;
off_t copy_length;
off_t src_offset;
int use_pread;
ret = fstat(stp->src_fd, &src_stat);
if (ret == -1) {
stp->syserr = "fstat";
stp->error_no = errno;
return -1;
}
if (!S_ISREG(src_stat.st_mode))
return 0;
ret = fstat(stp->dst_fd, &dst_stat);
if (ret == -1) {
stp->syserr = "fstat";
stp->error_no = errno;
return -1;
}
if ((dst_stat.st_mode & S_IFMT) != S_IFSOCK)
return 0;
src_offset = stp->src_offset;
use_pread = src_offset != (off_t)-1;
copy_length = stp->copy_length;
if (copy_length == (off_t)-1) {
if (use_pread)
copy_length = src_stat.st_size - src_offset;
else {
off_t cur = lseek(stp->src_fd, 0, SEEK_CUR);
if (cur == (off_t)-1) {
stp->syserr = "lseek";
stp->error_no = errno;
return -1;
}
copy_length = src_stat.st_size - cur;
}
}
retry_sendfile:
if (use_pread) {
ss = simple_sendfile(stp->dst_fd, stp->src_fd, &src_offset, copy_length);
}
else {
ss = simple_sendfile(stp->dst_fd, stp->src_fd, NULL, copy_length);
}
if (0 < ss) {
stp->total += ss;
copy_length -= ss;
if (0 < copy_length) {
ss = -1;
errno = EAGAIN;
}
}
if (ss == -1) {
if (errno == EINVAL || errno == ENOSYS)
return 0;
if (errno == EAGAIN || errno == EWOULDBLOCK) {
if (copy_stream_wait_write(stp) == -1)
return -1;
if (RUBY_VM_INTERRUPTED(stp->th))
return -1;
goto retry_sendfile;
}
stp->syserr = "sendfile";
stp->error_no = errno;
return -1;
}
return 1;
}
#endif
static ssize_t
copy_stream_read(struct copy_stream_struct *stp, char *buf, int len, off_t offset)
{
ssize_t ss;
retry_read:
if (offset == (off_t)-1)
ss = read(stp->src_fd, buf, len);
else {
#ifdef HAVE_PREAD
ss = pread(stp->src_fd, buf, len, offset);
#else
stp->notimp = "pread";
return -1;
#endif
}
if (ss == 0) {
return 0;
}
if (ss == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
if (copy_stream_wait_read(stp) == -1)
return -1;
goto retry_read;
}
if (errno == ENOSYS) {
stp->notimp = "pread";
return -1;
}
stp->syserr = offset == (off_t)-1 ? "read" : "pread";
stp->error_no = errno;
return -1;
}
return ss;
}
static int
copy_stream_write(struct copy_stream_struct *stp, char *buf, int len)
{
ssize_t ss;
int off = 0;
while (len) {
ss = write(stp->dst_fd, buf+off, len);
if (ss == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
if (copy_stream_wait_write(stp) == -1)
return -1;
continue;
}
stp->syserr = "write";
stp->error_no = errno;
return -1;
}
off += ss;
len -= ss;
stp->total += ss;
}
return 0;
}
static void
copy_stream_read_write(struct copy_stream_struct *stp)
{
char buf[1024*16];
int len;
ssize_t ss;
int ret;
off_t copy_length;
int use_eof;
off_t src_offset;
int use_pread;
copy_length = stp->copy_length;
use_eof = copy_length == (off_t)-1;
src_offset = stp->src_offset;
use_pread = src_offset != (off_t)-1;
if (use_pread && stp->close_src) {
off_t r;
r = lseek(stp->src_fd, src_offset, SEEK_SET);
if (r == (off_t)-1) {
stp->syserr = "lseek";
stp->error_no = errno;
return;
}
src_offset = (off_t)-1;
use_pread = 0;
}
while (use_eof || 0 < copy_length) {
if (!use_eof && copy_length < sizeof(buf)) {
len = copy_length;
}
else {
len = sizeof(buf);
}
if (use_pread) {
ss = copy_stream_read(stp, buf, len, src_offset);
if (0 < ss)
src_offset += ss;
}
else {
ss = copy_stream_read(stp, buf, len, (off_t)-1);
}
if (ss <= 0) /* EOF or error */
return;
ret = copy_stream_write(stp, buf, ss);
if (ret < 0)
return;
if (!use_eof)
copy_length -= ss;
if (RUBY_VM_INTERRUPTED(stp->th))
return;
}
}
static VALUE
copy_stream_func(void *arg)
{
struct copy_stream_struct *stp = (struct copy_stream_struct *)arg;
#ifdef USE_SENDFILE
int ret;
#endif
#ifdef USE_SENDFILE
ret = copy_stream_sendfile(stp);
if (ret != 0)
goto finish; /* error or success */
#endif
copy_stream_read_write(stp);
#ifdef USE_SENDFILE
finish:
#endif
return Qnil;
}
static VALUE
copy_stream_fallback_body(VALUE arg)
{
struct copy_stream_struct *stp = (struct copy_stream_struct *)arg;
const int buflen = 16*1024;
VALUE n;
VALUE buf = rb_str_buf_new(buflen);
long rest = stp->copy_length;
off_t off = stp->src_offset;
while (1) {
long numwrote;
long l;
if (stp->copy_length == (off_t)-1) {
l = buflen;
}
else {
if (rest == 0)
break;
l = buflen < rest ? buflen : rest;
}
if (stp->src_fd == -1) {
rb_funcall(stp->src, id_readpartial, 2, INT2FIX(l), buf);
}
else {
ssize_t ss;
rb_thread_wait_fd(stp->src_fd);
rb_str_resize(buf, buflen);
ss = copy_stream_read(stp, RSTRING_PTR(buf), l, off);
if (ss == -1)
return Qnil;
if (ss == 0)
rb_eof_error();
rb_str_resize(buf, ss);
if (off != (off_t)-1)
off += ss;
}
n = rb_io_write(stp->dst, buf);
numwrote = NUM2LONG(n);
stp->total += numwrote;
rest -= numwrote;
}
return Qnil;
}
static VALUE
copy_stream_fallback(struct copy_stream_struct *stp)
{
if (stp->src_fd == -1 && stp->src_offset != (off_t)-1) {
rb_raise(rb_eArgError, "cannot specify src_offset for non-IO");
}
rb_rescue2(copy_stream_fallback_body, (VALUE)stp,
(VALUE (*) (ANYARGS))0, (VALUE)0,
rb_eEOFError, (VALUE)0);
return Qnil;
}
static VALUE
copy_stream_body(VALUE arg)
{
struct copy_stream_struct *stp = (struct copy_stream_struct *)arg;
VALUE src_io, dst_io;
rb_io_t *src_fptr = 0, *dst_fptr = 0;
int src_fd, dst_fd;
stp->th = GET_THREAD();
stp->total = 0;
if (stp->src == argf ||
!(TYPE(stp->src) == T_FILE ||
rb_respond_to(stp->src, rb_intern("to_io")) ||
TYPE(stp->src) == T_STRING ||
rb_respond_to(stp->src, rb_intern("to_path")))) {
src_fd = -1;
}
else {
src_io = rb_check_convert_type(stp->src, T_FILE, "IO", "to_io");
if (NIL_P(src_io)) {
VALUE args[2];
int flags = O_RDONLY;
#ifdef O_NOCTTY
flags |= O_NOCTTY;
#endif
FilePathValue(stp->src);
args[0] = stp->src;
args[1] = INT2NUM(flags);
src_io = rb_class_new_instance(2, args, rb_cFile);
stp->src = src_io;
stp->close_src = 1;
}
GetOpenFile(src_io, src_fptr);
rb_io_check_readable(src_fptr);
src_fd = src_fptr->fd;
}
stp->src_fd = src_fd;
if (stp->dst == argf ||
!(TYPE(stp->dst) == T_FILE ||
rb_respond_to(stp->dst, rb_intern("to_io")) ||
TYPE(stp->dst) == T_STRING ||
rb_respond_to(stp->dst, rb_intern("to_path")))) {
dst_fd = -1;
}
else {
dst_io = rb_check_convert_type(stp->dst, T_FILE, "IO", "to_io");
if (NIL_P(dst_io)) {
VALUE args[3];
int flags = O_WRONLY|O_CREAT|O_TRUNC;
#ifdef O_NOCTTY
flags |= O_NOCTTY;
#endif
FilePathValue(stp->dst);
args[0] = stp->dst;
args[1] = INT2NUM(flags);
args[2] = INT2FIX(0600);
dst_io = rb_class_new_instance(3, args, rb_cFile);
stp->dst = dst_io;
stp->close_dst = 1;
}
else {
dst_io = GetWriteIO(dst_io);
stp->dst = dst_io;
}
GetOpenFile(dst_io, dst_fptr);
rb_io_check_writable(dst_fptr);
dst_fd = dst_fptr->fd;
}
stp->dst_fd = dst_fd;
if (stp->src_offset == (off_t)-1 && src_fptr && src_fptr->rbuf_len) {
long len = src_fptr->rbuf_len;
VALUE str;
if (stp->copy_length != (off_t)-1 && stp->copy_length < len) {
len = stp->copy_length;
}
str = rb_str_buf_new(len);
rb_str_resize(str,len);
read_buffered_data(RSTRING_PTR(str), len, src_fptr);
if (dst_fptr) /* IO or filename */
io_fwrite(str, dst_fptr);
else /* others such as StringIO */
rb_io_write(stp->dst, str);
stp->total += len;
if (stp->copy_length != (off_t)-1)
stp->copy_length -= len;
}
if (dst_fptr && io_fflush(dst_fptr) < 0) {
rb_raise(rb_eIOError, "flush failed");
}
if (stp->copy_length == 0)
return Qnil;
if (src_fd == -1 || dst_fd == -1) {
return copy_stream_fallback(stp);
}
rb_fd_init(&stp->fds);
rb_fd_set(src_fd, &stp->fds);
rb_fd_set(dst_fd, &stp->fds);
return rb_thread_blocking_region(copy_stream_func, (void*)stp, RB_UBF_DFL, 0);
}
static VALUE
copy_stream_finalize(VALUE arg)
{
struct copy_stream_struct *stp = (struct copy_stream_struct *)arg;
if (stp->close_src) {
rb_io_close_m(stp->src);
}
if (stp->close_dst) {
rb_io_close_m(stp->dst);
}
rb_fd_term(&stp->fds);
if (stp->syserr) {
errno = stp->error_no;
rb_sys_fail(stp->syserr);
}
if (stp->notimp) {
rb_raise(rb_eNotImpError, "%s() not implemented", stp->notimp);
}
return Qnil;
}
/*
* call-seq:
* IO.copy_stream(src, dst)
* IO.copy_stream(src, dst, copy_length)
* IO.copy_stream(src, dst, copy_length, src_offset)
*
* IO.copy_stream copies <i>src</i> to <i>dst</i>.
* <i>src</i> and <i>dst</i> is either a filename or an IO.
*
* This method returns the number of bytes copied.
*
* If optional arguments are not given,
* the start position of the copy is
* the beginning of the filename or
* the current file offset of the IO.
* The end position of the copy is the end of file.
*
* If <i>copy_length</i> is given,
* No more than <i>copy_length</i> bytes are copied.
*
* If <i>src_offset</i> is given,
* it specifies the start position of the copy.
*
* When <i>src_offset</i> is specified and
* <i>src</i> is an IO,
* IO.copy_stream doesn't move the current file offset.
*
*/
static VALUE
rb_io_s_copy_stream(int argc, VALUE *argv, VALUE io)
{
VALUE src, dst, length, src_offset;
struct copy_stream_struct st;
MEMZERO(&st, struct copy_stream_struct, 1);
rb_scan_args(argc, argv, "22", &src, &dst, &length, &src_offset);
st.src = src;
st.dst = dst;
if (NIL_P(length))
st.copy_length = (off_t)-1;
else
st.copy_length = NUM2OFFT(length);
if (NIL_P(src_offset))
st.src_offset = (off_t)-1;
else
st.src_offset = NUM2OFFT(src_offset);
rb_ensure(copy_stream_body, (VALUE)&st, copy_stream_finalize, (VALUE)&st);
return OFFT2NUM(st.total);
}
/*
* call-seq:
* io.external_encoding => encoding
*
* Returns the Encoding object that represents the encoding of the file.
* If io is write mode and no encoding is specified, returns <code>nil</code>.
*/
static VALUE
rb_io_external_encoding(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (fptr->enc2) {
return rb_enc_from_encoding(fptr->enc2);
}
if (!fptr->enc && fptr->fd == 0) {
fptr->enc = rb_default_external_encoding();
}
if (fptr->mode & FMODE_WRITABLE) {
if (fptr->enc)
return rb_enc_from_encoding(fptr->enc);
return Qnil;
}
return rb_enc_from_encoding(io_read_encoding(fptr));
}
/*
* call-seq:
* io.internal_encoding => encoding
*
* Returns the Encoding of the internal string if conversion is
* specified. Otherwise returns nil.
*/
static VALUE
rb_io_internal_encoding(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (!fptr->enc2) return Qnil;
return rb_enc_from_encoding(io_read_encoding(fptr));
}
/*
* call-seq:
* io.set_encoding(ext_enc) => io
* io.set_encoding("ext_enc:int_enc") => io
* io.set_encoding(ext_enc, int_enc) => io
*
* If single argument is specified, read string from io is tagged
* with the encoding specified. If encoding is a colon separated two
* encoding names "A:B", the read string is converted from encoding A
* (external encoding) to encoding B (internal encoding), then tagged
* with B. If two arguments are specified, those must be encoding
* objects or encoding names, and the first one is the external encoding, and the
* second one is the internal encoding.
*/
static VALUE
rb_io_set_encoding(int argc, VALUE *argv, VALUE io)
{
rb_io_t *fptr;
VALUE v1, v2;
rb_scan_args(argc, argv, "11", &v1, &v2);
GetOpenFile(io, fptr);
io_encoding_set(fptr, argc, v1, v2);
return io;
}
static VALUE
argf_external_encoding(VALUE argf)
{
if (!RTEST(current_file)) {
return rb_enc_from_encoding(rb_default_external_encoding());
}
return rb_io_external_encoding(rb_io_check_io(current_file));
}
static VALUE
argf_internal_encoding(VALUE argf)
{
if (!RTEST(current_file)) {
return rb_enc_from_encoding(rb_default_external_encoding());
}
return rb_io_internal_encoding(rb_io_check_io(current_file));
}
static VALUE
argf_set_encoding(int argc, VALUE *argv, VALUE argf)
{
rb_io_t *fptr;
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream to set encoding");
}
rb_io_set_encoding(argc, argv, current_file);
GetOpenFile(current_file, fptr);
argf_enc = fptr->enc;
argf_enc2 = fptr->enc2;
return argf;
}
static VALUE
argf_tell(VALUE argf)
{
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream to tell");
}
ARGF_FORWARD(0, 0);
return rb_io_tell(current_file);
}
static VALUE
argf_seek_m(int argc, VALUE *argv, VALUE argf)
{
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream to seek");
}
ARGF_FORWARD(argc, argv);
return rb_io_seek_m(argc, argv, current_file);
}
static VALUE
argf_set_pos(VALUE argf, VALUE offset)
{
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream to set position");
}
ARGF_FORWARD(1, &offset);
return rb_io_set_pos(current_file, offset);
}
static VALUE
argf_rewind(VALUE argf)
{
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream to rewind");
}
ARGF_FORWARD(0, 0);
return rb_io_rewind(current_file);
}
static VALUE
argf_fileno(VALUE argf)
{
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream");
}
ARGF_FORWARD(0, 0);
return rb_io_fileno(current_file);
}
static VALUE
argf_to_io(VALUE argf)
{
next_argv();
ARGF_FORWARD(0, 0);
return current_file;
}
static VALUE
argf_eof(VALUE argf)
{
if (current_file) {
if (init_p == 0) return Qtrue;
ARGF_FORWARD(0, 0);
if (rb_io_eof(current_file)) {
return Qtrue;
}
}
return Qfalse;
}
static VALUE
argf_read(int argc, VALUE *argv, VALUE argf)
{
VALUE tmp, str, length;
long len = 0;
rb_scan_args(argc, argv, "02", &length, &str);
if (!NIL_P(length)) {
len = NUM2LONG(argv[0]);
}
if (!NIL_P(str)) {
StringValue(str);
rb_str_resize(str,0);
argv[1] = Qnil;
}
retry:
if (!next_argv()) {
return str;
}
if (ARGF_GENERIC_INPUT_P()) {
tmp = argf_forward(argc, argv, argf);
}
else {
tmp = io_read(argc, argv, current_file);
}
if (NIL_P(str)) str = tmp;
else if (!NIL_P(tmp)) rb_str_append(str, tmp);
if (NIL_P(tmp) || NIL_P(length)) {
if (next_p != -1) {
argf_close(current_file);
next_p = 1;
goto retry;
}
}
else if (argc >= 1) {
if (RSTRING_LEN(str) < len) {
len -= RSTRING_LEN(str);
argv[0] = INT2NUM(len);
goto retry;
}
}
return str;
}
struct argf_call_arg {
int argc;
VALUE *argv;
VALUE argf;
};
static VALUE
argf_forward_call(VALUE arg)
{
struct argf_call_arg *p = (struct argf_call_arg *)arg;
argf_forward(p->argc, p->argv, p->argf);
return Qnil;
}
static VALUE
argf_readpartial(int argc, VALUE *argv, VALUE argf)
{
VALUE tmp, str, length;
rb_scan_args(argc, argv, "11", &length, &str);
if (!NIL_P(str)) {
StringValue(str);
argv[1] = str;
}
if (!next_argv()) {
rb_str_resize(str, 0);
rb_eof_error();
}
if (ARGF_GENERIC_INPUT_P()) {
struct argf_call_arg arg;
arg.argc = argc;
arg.argv = argv;
arg.argf = argf;
tmp = rb_rescue2(argf_forward_call, (VALUE)&arg,
RUBY_METHOD_FUNC(0), Qnil, rb_eEOFError, (VALUE)0);
}
else {
tmp = io_getpartial(argc, argv, current_file, 0);
}
if (NIL_P(tmp)) {
if (next_p == -1) {
rb_eof_error();
}
argf_close(current_file);
next_p = 1;
if (RARRAY_LEN(rb_argv) == 0)
rb_eof_error();
if (NIL_P(str))
str = rb_str_new(NULL, 0);
return str;
}
return tmp;
}
static VALUE
argf_getc(VALUE argf)
{
VALUE ch;
retry:
if (!next_argv()) return Qnil;
if (ARGF_GENERIC_INPUT_P()) {
ch = rb_funcall3(current_file, rb_intern("getc"), 0, 0);
}
else {
ch = rb_io_getc(current_file);
}
if (NIL_P(ch) && next_p != -1) {
argf_close(current_file);
next_p = 1;
goto retry;
}
return ch;
}
static VALUE
argf_getbyte(VALUE argf)
{
VALUE ch;
retry:
if (!next_argv()) return Qnil;
if (TYPE(current_file) != T_FILE) {
ch = rb_funcall3(current_file, rb_intern("getbyte"), 0, 0);
}
else {
ch = rb_io_getbyte(current_file);
}
if (NIL_P(ch) && next_p != -1) {
argf_close(current_file);
next_p = 1;
goto retry;
}
return ch;
}
static VALUE
argf_readchar(VALUE argf)
{
VALUE ch;
retry:
if (!next_argv()) rb_eof_error();
if (TYPE(current_file) != T_FILE) {
ch = rb_funcall3(current_file, rb_intern("getc"), 0, 0);
}
else {
ch = rb_io_getc(current_file);
}
if (NIL_P(ch) && next_p != -1) {
argf_close(current_file);
next_p = 1;
goto retry;
}
return ch;
}
static VALUE
argf_readbyte(VALUE argf)
{
VALUE c;
NEXT_ARGF_FORWARD(0, 0);
c = argf_getbyte(argf);
if (NIL_P(c)) {
rb_eof_error();
}
return c;
}
static VALUE
argf_each_line(int argc, VALUE *argv, VALUE argf)
{
RETURN_ENUMERATOR(argf, argc, argv);
for (;;) {
if (!next_argv()) return Qnil;
rb_block_call(current_file, rb_intern("each_line"), 0, 0, rb_yield, 0);
next_p = 1;
}
return argf;
}
static VALUE
argf_each_byte(VALUE argf)
{
RETURN_ENUMERATOR(argf, 0, 0);
for (;;) {
if (!next_argv()) return Qnil;
rb_block_call(current_file, rb_intern("each_byte"), 0, 0, rb_yield, 0);
next_p = 1;
}
}
static VALUE
argf_each_char(VALUE argf)
{
RETURN_ENUMERATOR(argf, 0, 0);
for (;;) {
if (!next_argv()) return Qnil;
rb_block_call(current_file, rb_intern("each_char"), 0, 0, rb_yield, 0);
next_p = 1;
}
}
static VALUE
argf_filename(VALUE argf)
{
next_argv();
return filename;
}
static VALUE
argf_filename_getter(ID id, VALUE *var)
{
return argf_filename(*var);
}
static VALUE
argf_file(VALUE argf)
{
next_argv();
return current_file;
}
static VALUE
argf_binmode_m(VALUE argf)
{
argf_binmode = 1;
next_argv();
ARGF_FORWARD(0, 0);
rb_io_binmode(current_file);
return argf;
}
static VALUE
argf_skip(VALUE argf)
{
if (next_p != -1) {
argf_close(current_file);
next_p = 1;
}
return argf;
}
static VALUE
argf_close_m(VALUE argf)
{
next_argv();
argf_close(current_file);
if (next_p != -1) {
next_p = 1;
}
gets_lineno = 0;
return argf;
}
static VALUE
argf_closed(VALUE argf)
{
next_argv();
ARGF_FORWARD(0, 0);
return rb_io_closed(current_file);
}
static VALUE
argf_to_s(VALUE argf)
{
return rb_str_new2("ARGF");
}
static VALUE
argf_inplace_mode_get(VALUE argf)
{
if (!ruby_inplace_mode) return Qnil;
return rb_str_new2(ruby_inplace_mode);
}
static VALUE
opt_i_get(ID id, VALUE *var)
{
return argf_inplace_mode_get(*var);
}
static VALUE
argf_inplace_mode_set(VALUE argf, VALUE val)
{
if (!RTEST(val)) {
if (ruby_inplace_mode) free(ruby_inplace_mode);
ruby_inplace_mode = 0;
}
else {
StringValue(val);
if (ruby_inplace_mode) free(ruby_inplace_mode);
ruby_inplace_mode = 0;
ruby_inplace_mode = strdup(RSTRING_PTR(val));
}
return argf;
}
static void
opt_i_set(VALUE val, ID id, VALUE *var)
{
argf_inplace_mode_set(*var, val);
}
const char *
ruby_get_inplace_mode(void)
{
return ruby_inplace_mode;
}
void
ruby_set_inplace_mode(const char *suffix)
{
if (ruby_inplace_mode) free(ruby_inplace_mode);
ruby_inplace_mode = 0;
if (suffix) ruby_inplace_mode = strdup(suffix);
}
static VALUE
argf_argv(VALUE argf)
{
return rb_argv;
}
static VALUE
argf_argv_getter(ID id, VALUE *var)
{
return argf_argv(*var);
}
VALUE
rb_get_argv(void)
{
return rb_argv;
}
/*
* Class <code>IO</code> is the basis for all input and output in Ruby.
* An I/O stream may be <em>duplexed</em> (that is, bidirectional), and
* so may use more than one native operating system stream.
*
* Many of the examples in this section use class <code>File</code>,
* the only standard subclass of <code>IO</code>. The two classes are
* closely associated.
*
* As used in this section, <em>portname</em> may take any of the
* following forms.
*
* * A plain string represents a filename suitable for the underlying
* operating system.
*
* * A string starting with ``<code>|</code>'' indicates a subprocess.
* The remainder of the string following the ``<code>|</code>'' is
* invoked as a process with appropriate input/output channels
* connected to it.
*
* * A string equal to ``<code>|-</code>'' will create another Ruby
* instance as a subprocess.
*
* Ruby will convert pathnames between different operating system
* conventions if possible. For instance, on a Windows system the
* filename ``<code>/gumby/ruby/test.rb</code>'' will be opened as
* ``<code>\gumby\ruby\test.rb</code>''. When specifying a
* Windows-style filename in a Ruby string, remember to escape the
* backslashes:
*
* "c:\\gumby\\ruby\\test.rb"
*
* Our examples here will use the Unix-style forward slashes;
* <code>File::SEPARATOR</code> can be used to get the
* platform-specific separator character.
*
* I/O ports may be opened in any one of several different modes, which
* are shown in this section as <em>mode</em>. The mode may
* either be a Fixnum or a String. If numeric, it should be
* one of the operating system specific constants (O_RDONLY,
* O_WRONLY, O_RDWR, O_APPEND and so on). See man open(2) for
* more information.
*
* If the mode is given as a String, it must be one of the
* values listed in the following table.
*
* Mode | Meaning
* -----+--------------------------------------------------------
* "r" | Read-only, starts at beginning of file (default mode).
* -----+--------------------------------------------------------
* "r+" | Read-write, starts at beginning of file.
* -----+--------------------------------------------------------
* "w" | Write-only, truncates existing file
* | to zero length or creates a new file for writing.
* -----+--------------------------------------------------------
* "w+" | Read-write, truncates existing file to zero length
* | or creates a new file for reading and writing.
* -----+--------------------------------------------------------
* "a" | Write-only, starts at end of file if file exists,
* | otherwise creates a new file for writing.
* -----+--------------------------------------------------------
* "a+" | Read-write, starts at end of file if file exists,
* | otherwise creates a new file for reading and
* | writing.
* -----+--------------------------------------------------------
* "b" | (DOS/Windows only) Binary file mode (may appear with
* | any of the key letters listed above).
*
*
* The global constant ARGF (also accessible as $<) provides an
* IO-like stream which allows access to all files mentioned on the
* command line (or STDIN if no files are mentioned). ARGF provides
* the methods <code>#path</code> and <code>#filename</code> to access
* the name of the file currently being read.
*/
void
Init_IO(void)
{
#undef rb_intern
VALUE rb_cARGF;
#ifdef __CYGWIN__
#include <sys/cygwin.h>
static struct __cygwin_perfile pf[] =
{
{"", O_RDONLY | O_BINARY},
{"", O_WRONLY | O_BINARY},
{"", O_RDWR | O_BINARY},
{"", O_APPEND | O_BINARY},
{NULL, 0}
};
cygwin_internal(CW_PERFILE, pf);
#endif
rb_eIOError = rb_define_class("IOError", rb_eStandardError);
rb_eEOFError = rb_define_class("EOFError", rb_eIOError);
id_write = rb_intern("write");
id_read = rb_intern("read");
id_getc = rb_intern("getc");
id_flush = rb_intern("flush");
id_encode = rb_intern("encode");
id_readpartial = rb_intern("readpartial");
rb_define_global_function("syscall", rb_f_syscall, -1);
rb_define_global_function("open", rb_f_open, -1);
rb_define_global_function("printf", rb_f_printf, -1);
rb_define_global_function("print", rb_f_print, -1);
rb_define_global_function("putc", rb_f_putc, 1);
rb_define_global_function("puts", rb_f_puts, -1);
rb_define_global_function("gets", rb_f_gets, -1);
rb_define_global_function("readline", rb_f_readline, -1);
rb_define_global_function("select", rb_f_select, -1);
rb_define_global_function("readlines", rb_f_readlines, -1);
rb_define_global_function("`", rb_f_backquote, 1);
rb_define_global_function("p", rb_f_p, -1);
rb_define_method(rb_mKernel, "display", rb_obj_display, -1);
rb_cIO = rb_define_class("IO", rb_cObject);
rb_include_module(rb_cIO, rb_mEnumerable);
rb_define_alloc_func(rb_cIO, io_alloc);
rb_define_singleton_method(rb_cIO, "new", rb_io_s_new, -1);
rb_define_singleton_method(rb_cIO, "open", rb_io_s_open, -1);
rb_define_singleton_method(rb_cIO, "sysopen", rb_io_s_sysopen, -1);
rb_define_singleton_method(rb_cIO, "for_fd", rb_io_s_for_fd, -1);
rb_define_singleton_method(rb_cIO, "popen", rb_io_s_popen, -1);
rb_define_singleton_method(rb_cIO, "foreach", rb_io_s_foreach, -1);
rb_define_singleton_method(rb_cIO, "readlines", rb_io_s_readlines, -1);
rb_define_singleton_method(rb_cIO, "read", rb_io_s_read, -1);
rb_define_singleton_method(rb_cIO, "select", rb_f_select, -1);
rb_define_singleton_method(rb_cIO, "pipe", rb_io_s_pipe, -1);
rb_define_singleton_method(rb_cIO, "try_convert", rb_io_s_try_convert, 1);
rb_define_singleton_method(rb_cIO, "copy_stream", rb_io_s_copy_stream, -1);
rb_define_method(rb_cIO, "initialize", rb_io_initialize, -1);
rb_output_fs = Qnil;
rb_define_hooked_variable("$,", &rb_output_fs, 0, rb_str_setter);
rb_global_variable(&rb_default_rs);
rb_rs = rb_default_rs = rb_str_new2("\n");
rb_output_rs = Qnil;
OBJ_FREEZE(rb_default_rs); /* avoid modifying RS_default */
rb_define_hooked_variable("$/", &rb_rs, 0, rb_str_setter);
rb_define_hooked_variable("$-0", &rb_rs, 0, rb_str_setter);
rb_define_hooked_variable("$\\", &rb_output_rs, 0, rb_str_setter);
rb_define_virtual_variable("$_", rb_lastline_get, rb_lastline_set);
rb_define_method(rb_cIO, "initialize_copy", rb_io_init_copy, 1);
rb_define_method(rb_cIO, "reopen", rb_io_reopen, -1);
rb_define_method(rb_cIO, "print", rb_io_print, -1);
rb_define_method(rb_cIO, "putc", rb_io_putc, 1);
rb_define_method(rb_cIO, "puts", rb_io_puts, -1);
rb_define_method(rb_cIO, "printf", rb_io_printf, -1);
rb_define_method(rb_cIO, "each", rb_io_each_line, -1);
rb_define_method(rb_cIO, "each_line", rb_io_each_line, -1);
rb_define_method(rb_cIO, "each_byte", rb_io_each_byte, 0);
rb_define_method(rb_cIO, "each_char", rb_io_each_char, 0);
rb_define_method(rb_cIO, "lines", rb_io_lines, -1);
rb_define_method(rb_cIO, "bytes", rb_io_bytes, 0);
rb_define_method(rb_cIO, "chars", rb_io_chars, 0);
rb_define_method(rb_cIO, "syswrite", rb_io_syswrite, 1);
rb_define_method(rb_cIO, "sysread", rb_io_sysread, -1);
rb_define_method(rb_cIO, "fileno", rb_io_fileno, 0);
rb_define_alias(rb_cIO, "to_i", "fileno");
rb_define_method(rb_cIO, "to_io", rb_io_to_io, 0);
rb_define_method(rb_cIO, "fsync", rb_io_fsync, 0);
rb_define_method(rb_cIO, "sync", rb_io_sync, 0);
rb_define_method(rb_cIO, "sync=", rb_io_set_sync, 1);
rb_define_method(rb_cIO, "lineno", rb_io_lineno, 0);
rb_define_method(rb_cIO, "lineno=", rb_io_set_lineno, 1);
rb_define_method(rb_cIO, "readlines", rb_io_readlines, -1);
rb_define_method(rb_cIO, "read_nonblock", io_read_nonblock, -1);
rb_define_method(rb_cIO, "write_nonblock", rb_io_write_nonblock, 1);
rb_define_method(rb_cIO, "readpartial", io_readpartial, -1);
rb_define_method(rb_cIO, "read", io_read, -1);
rb_define_method(rb_cIO, "write", io_write, 1);
rb_define_method(rb_cIO, "gets", rb_io_gets_m, -1);
rb_define_method(rb_cIO, "readline", rb_io_readline, -1);
rb_define_method(rb_cIO, "getc", rb_io_getc, 0);
rb_define_method(rb_cIO, "getbyte", rb_io_getbyte, 0);
rb_define_method(rb_cIO, "readchar", rb_io_readchar, 0);
rb_define_method(rb_cIO, "readbyte", rb_io_readbyte, 0);
rb_define_method(rb_cIO, "ungetc",rb_io_ungetc, 1);
rb_define_method(rb_cIO, "<<", rb_io_addstr, 1);
rb_define_method(rb_cIO, "flush", rb_io_flush, 0);
rb_define_method(rb_cIO, "tell", rb_io_tell, 0);
rb_define_method(rb_cIO, "seek", rb_io_seek_m, -1);
rb_define_const(rb_cIO, "SEEK_SET", INT2FIX(SEEK_SET));
rb_define_const(rb_cIO, "SEEK_CUR", INT2FIX(SEEK_CUR));
rb_define_const(rb_cIO, "SEEK_END", INT2FIX(SEEK_END));
rb_define_method(rb_cIO, "rewind", rb_io_rewind, 0);
rb_define_method(rb_cIO, "pos", rb_io_tell, 0);
rb_define_method(rb_cIO, "pos=", rb_io_set_pos, 1);
rb_define_method(rb_cIO, "eof", rb_io_eof, 0);
rb_define_method(rb_cIO, "eof?", rb_io_eof, 0);
rb_define_method(rb_cIO, "close_on_exec?", rb_io_close_on_exec_p, 0);
rb_define_method(rb_cIO, "close_on_exec=", rb_io_set_close_on_exec, 1);
rb_define_method(rb_cIO, "close", rb_io_close_m, 0);
rb_define_method(rb_cIO, "closed?", rb_io_closed, 0);
rb_define_method(rb_cIO, "close_read", rb_io_close_read, 0);
rb_define_method(rb_cIO, "close_write", rb_io_close_write, 0);
rb_define_method(rb_cIO, "isatty", rb_io_isatty, 0);
rb_define_method(rb_cIO, "tty?", rb_io_isatty, 0);
rb_define_method(rb_cIO, "binmode", rb_io_binmode_m, 0);
rb_define_method(rb_cIO, "sysseek", rb_io_sysseek, -1);
rb_define_method(rb_cIO, "ioctl", rb_io_ioctl, -1);
rb_define_method(rb_cIO, "fcntl", rb_io_fcntl, -1);
rb_define_method(rb_cIO, "pid", rb_io_pid, 0);
rb_define_method(rb_cIO, "inspect", rb_io_inspect, 0);
rb_define_method(rb_cIO, "external_encoding", rb_io_external_encoding, 0);
rb_define_method(rb_cIO, "internal_encoding", rb_io_internal_encoding, 0);
rb_define_method(rb_cIO, "set_encoding", rb_io_set_encoding, -1);
rb_define_variable("$stdin", &rb_stdin);
rb_stdin = prep_stdio(stdin, FMODE_READABLE, rb_cIO, "<STDIN>");
rb_define_hooked_variable("$stdout", &rb_stdout, 0, stdout_setter);
rb_stdout = prep_stdio(stdout, FMODE_WRITABLE, rb_cIO, "<STDOUT>");
rb_define_hooked_variable("$stderr", &rb_stderr, 0, stdout_setter);
rb_stderr = prep_stdio(stderr, FMODE_WRITABLE|FMODE_SYNC, rb_cIO, "<STDERR>");
rb_define_hooked_variable("$>", &rb_stdout, 0, stdout_setter);
orig_stdout = rb_stdout;
rb_deferr = orig_stderr = rb_stderr;
/* constants to hold original stdin/stdout/stderr */
rb_define_global_const("STDIN", rb_stdin);
rb_define_global_const("STDOUT", rb_stdout);
rb_define_global_const("STDERR", rb_stderr);
rb_cARGF = rb_class_new(rb_cObject);
rb_set_class_path(rb_cARGF, rb_cObject, "ARGF.class");
rb_define_alloc_func(rb_cARGF, argf_alloc);
rb_include_module(rb_cARGF, rb_mEnumerable);
rb_define_method(rb_cARGF, "initialize", argf_initialize, -2);
rb_define_method(rb_cARGF, "initialize_copy", argf_initialize_copy, 1);
rb_define_method(rb_cARGF, "to_s", argf_to_s, 0);
rb_define_method(rb_cARGF, "argv", argf_argv, 0);
rb_define_method(rb_cARGF, "fileno", argf_fileno, 0);
rb_define_method(rb_cARGF, "to_i", argf_fileno, 0);
rb_define_method(rb_cARGF, "to_io", argf_to_io, 0);
rb_define_method(rb_cARGF, "each", argf_each_line, -1);
rb_define_method(rb_cARGF, "each_line", argf_each_line, -1);
rb_define_method(rb_cARGF, "each_byte", argf_each_byte, 0);
rb_define_method(rb_cARGF, "each_char", argf_each_char, 0);
rb_define_method(rb_cARGF, "lines", argf_each_line, -1);
rb_define_method(rb_cARGF, "bytes", argf_each_byte, 0);
rb_define_method(rb_cARGF, "chars", argf_each_char, 0);
rb_define_method(rb_cARGF, "read", argf_read, -1);
rb_define_method(rb_cARGF, "readpartial", argf_readpartial, -1);
rb_define_method(rb_cARGF, "readlines", argf_readlines, -1);
rb_define_method(rb_cARGF, "to_a", argf_readlines, -1);
rb_define_method(rb_cARGF, "gets", argf_gets, -1);
rb_define_method(rb_cARGF, "readline", argf_readline, -1);
rb_define_method(rb_cARGF, "getc", argf_getc, 0);
rb_define_method(rb_cARGF, "getbyte", argf_getbyte, 0);
rb_define_method(rb_cARGF, "readchar", argf_readchar, 0);
rb_define_method(rb_cARGF, "readbyte", argf_readbyte, 0);
rb_define_method(rb_cARGF, "tell", argf_tell, 0);
rb_define_method(rb_cARGF, "seek", argf_seek_m, -1);
rb_define_method(rb_cARGF, "rewind", argf_rewind, 0);
rb_define_method(rb_cARGF, "pos", argf_tell, 0);
rb_define_method(rb_cARGF, "pos=", argf_set_pos, 1);
rb_define_method(rb_cARGF, "eof", argf_eof, 0);
rb_define_method(rb_cARGF, "eof?", argf_eof, 0);
rb_define_method(rb_cARGF, "binmode", argf_binmode_m, 0);
rb_define_method(rb_cARGF, "filename", argf_filename, 0);
rb_define_method(rb_cARGF, "path", argf_filename, 0);
rb_define_method(rb_cARGF, "file", argf_file, 0);
rb_define_method(rb_cARGF, "skip", argf_skip, 0);
rb_define_method(rb_cARGF, "close", argf_close_m, 0);
rb_define_method(rb_cARGF, "closed?", argf_closed, 0);
rb_define_method(rb_cARGF, "lineno", argf_lineno, 0);
rb_define_method(rb_cARGF, "lineno=", argf_set_lineno, 1);
rb_define_method(rb_cARGF, "inplace_mode", argf_inplace_mode_get, 0);
rb_define_method(rb_cARGF, "inplace_mode=", argf_inplace_mode_set, 1);
rb_define_method(rb_cARGF, "external_encoding", argf_external_encoding, 0);
rb_define_method(rb_cARGF, "internal_encoding", argf_internal_encoding, 0);
rb_define_method(rb_cARGF, "set_encoding", argf_set_encoding, -1);
argf = rb_class_new_instance(0, 0, rb_cARGF);
rb_define_readonly_variable("$<", &argf);
rb_define_global_const("ARGF", argf);
rb_define_hooked_variable("$.", &argf, argf_lineno_getter, argf_lineno_setter);
rb_define_hooked_variable("$FILENAME", &argf, argf_filename_getter, 0);
filename = rb_str_new2("-");
rb_define_hooked_variable("$-i", &argf, opt_i_get, opt_i_set);
rb_define_hooked_variable("$*", &argf, argf_argv_getter, 0);
#if defined (_WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(__human68k__)
atexit(pipe_atexit);
#endif
Init_File();
rb_define_method(rb_cFile, "initialize", rb_file_initialize, -1);
rb_file_const("RDONLY", INT2FIX(O_RDONLY));
rb_file_const("WRONLY", INT2FIX(O_WRONLY));
rb_file_const("RDWR", INT2FIX(O_RDWR));
rb_file_const("APPEND", INT2FIX(O_APPEND));
rb_file_const("CREAT", INT2FIX(O_CREAT));
rb_file_const("EXCL", INT2FIX(O_EXCL));
#if defined(O_NDELAY) || defined(O_NONBLOCK)
# ifdef O_NONBLOCK
rb_file_const("NONBLOCK", INT2FIX(O_NONBLOCK));
# else
rb_file_const("NONBLOCK", INT2FIX(O_NDELAY));
# endif
#endif
rb_file_const("TRUNC", INT2FIX(O_TRUNC));
#ifdef O_NOCTTY
rb_file_const("NOCTTY", INT2FIX(O_NOCTTY));
#endif
#ifdef O_BINARY
rb_file_const("BINARY", INT2FIX(O_BINARY));
#else
rb_file_const("BINARY", INT2FIX(0));
#endif
#ifdef O_SYNC
rb_file_const("SYNC", INT2FIX(O_SYNC));
#endif
sym_mode = ID2SYM(rb_intern("mode"));
sym_perm = ID2SYM(rb_intern("perm"));
sym_extenc = ID2SYM(rb_intern("external_encoding"));
sym_intenc = ID2SYM(rb_intern("internal_encoding"));
sym_encoding = ID2SYM(rb_intern("encoding"));
sym_open_args = ID2SYM(rb_intern("open_args"));
}
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