зеркало из https://github.com/github/ruby.git
752 строки
20 KiB
C
752 строки
20 KiB
C
#include "ruby/config.h"
|
|
#ifdef RUBY_EXTCONF_H
|
|
#include RUBY_EXTCONF_H
|
|
#endif
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/file.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#ifdef HAVE_PWD_H
|
|
#include <pwd.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_IOCTL_H
|
|
#include <sys/ioctl.h>
|
|
#endif
|
|
#ifdef HAVE_LIBUTIL_H
|
|
#include <libutil.h>
|
|
#endif
|
|
#ifdef HAVE_UTIL_H
|
|
#include <util.h>
|
|
#endif
|
|
#ifdef HAVE_PTY_H
|
|
#include <pty.h>
|
|
#endif
|
|
#if defined(HAVE_SYS_PARAM_H)
|
|
/* for __FreeBSD_version */
|
|
# include <sys/param.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_WAIT_H
|
|
#include <sys/wait.h>
|
|
#else
|
|
#define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
|
|
#endif
|
|
#include <ctype.h>
|
|
|
|
#include "ruby/io.h"
|
|
#include "internal.h"
|
|
#include "ruby/util.h"
|
|
|
|
#include <signal.h>
|
|
#ifdef HAVE_SYS_STROPTS_H
|
|
#include <sys/stropts.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#define DEVICELEN 16
|
|
|
|
#ifndef HAVE_SETEUID
|
|
# ifdef HAVE_SETREUID
|
|
# define seteuid(e) setreuid(-1, (e))
|
|
# else /* NOT HAVE_SETREUID */
|
|
# ifdef HAVE_SETRESUID
|
|
# define seteuid(e) setresuid(-1, (e), -1)
|
|
# else /* NOT HAVE_SETRESUID */
|
|
/* I can't set euid. (;_;) */
|
|
# endif /* HAVE_SETRESUID */
|
|
# endif /* HAVE_SETREUID */
|
|
#endif /* NO_SETEUID */
|
|
|
|
static VALUE eChildExited;
|
|
|
|
/* Returns the exit status of the child for which PTY#check
|
|
* raised this exception
|
|
*/
|
|
static VALUE
|
|
echild_status(VALUE self)
|
|
{
|
|
return rb_ivar_get(self, rb_intern("status"));
|
|
}
|
|
|
|
struct pty_info {
|
|
int fd;
|
|
rb_pid_t child_pid;
|
|
};
|
|
|
|
static void getDevice(int*, int*, char [DEVICELEN], int);
|
|
|
|
struct child_info {
|
|
int master, slave;
|
|
char *slavename;
|
|
VALUE execarg_obj;
|
|
struct rb_execarg *eargp;
|
|
};
|
|
|
|
static int
|
|
chfunc(void *data, char *errbuf, size_t errbuf_len)
|
|
{
|
|
struct child_info *carg = data;
|
|
int master = carg->master;
|
|
int slave = carg->slave;
|
|
|
|
#define ERROR_EXIT(str) do { \
|
|
strlcpy(errbuf, (str), errbuf_len); \
|
|
return -1; \
|
|
} while (0)
|
|
|
|
/*
|
|
* Set free from process group and controlling terminal
|
|
*/
|
|
#ifdef HAVE_SETSID
|
|
(void) setsid();
|
|
#else /* HAS_SETSID */
|
|
# ifdef HAVE_SETPGRP
|
|
# ifdef SETGRP_VOID
|
|
if (setpgrp() == -1)
|
|
ERROR_EXIT("setpgrp()");
|
|
# else /* SETGRP_VOID */
|
|
if (setpgrp(0, getpid()) == -1)
|
|
ERROR_EXIT("setpgrp()");
|
|
{
|
|
int i = rb_cloexec_open("/dev/tty", O_RDONLY, 0);
|
|
if (i < 0) ERROR_EXIT("/dev/tty");
|
|
rb_update_max_fd(i);
|
|
if (ioctl(i, TIOCNOTTY, (char *)0))
|
|
ERROR_EXIT("ioctl(TIOCNOTTY)");
|
|
close(i);
|
|
}
|
|
# endif /* SETGRP_VOID */
|
|
# endif /* HAVE_SETPGRP */
|
|
#endif /* HAS_SETSID */
|
|
|
|
/*
|
|
* obtain new controlling terminal
|
|
*/
|
|
#if defined(TIOCSCTTY)
|
|
close(master);
|
|
(void) ioctl(slave, TIOCSCTTY, (char *)0);
|
|
/* errors ignored for sun */
|
|
#else
|
|
close(slave);
|
|
slave = rb_cloexec_open(carg->slavename, O_RDWR, 0);
|
|
if (slave < 0) {
|
|
ERROR_EXIT("open: pty slave");
|
|
}
|
|
rb_update_max_fd(slave);
|
|
close(master);
|
|
#endif
|
|
dup2(slave,0);
|
|
dup2(slave,1);
|
|
dup2(slave,2);
|
|
if (slave < 0 || slave > 2) (void)!close(slave);
|
|
#if defined(HAVE_SETEUID) || defined(HAVE_SETREUID) || defined(HAVE_SETRESUID)
|
|
if (seteuid(getuid())) ERROR_EXIT("seteuid()");
|
|
#endif
|
|
|
|
return rb_exec_async_signal_safe(carg->eargp, errbuf, sizeof(errbuf_len));
|
|
#undef ERROR_EXIT
|
|
}
|
|
|
|
static void
|
|
establishShell(int argc, VALUE *argv, struct pty_info *info,
|
|
char SlaveName[DEVICELEN])
|
|
{
|
|
int master, slave, status = 0;
|
|
rb_pid_t pid;
|
|
char *p, *getenv();
|
|
VALUE v;
|
|
struct child_info carg;
|
|
char errbuf[32];
|
|
|
|
if (argc == 0) {
|
|
const char *shellname = "/bin/sh";
|
|
|
|
if ((p = getenv("SHELL")) != NULL) {
|
|
shellname = p;
|
|
}
|
|
else {
|
|
#if defined HAVE_PWD_H
|
|
const char *username = getenv("USER");
|
|
struct passwd *pwent = getpwnam(username ? username : getlogin());
|
|
if (pwent && pwent->pw_shell)
|
|
shellname = pwent->pw_shell;
|
|
#endif
|
|
}
|
|
v = rb_str_new2(shellname);
|
|
argc = 1;
|
|
argv = &v;
|
|
}
|
|
|
|
carg.execarg_obj = rb_execarg_new(argc, argv, 1, 0);
|
|
carg.eargp = rb_execarg_get(carg.execarg_obj);
|
|
rb_execarg_parent_start(carg.execarg_obj);
|
|
|
|
getDevice(&master, &slave, SlaveName, 0);
|
|
|
|
carg.master = master;
|
|
carg.slave = slave;
|
|
carg.slavename = SlaveName;
|
|
errbuf[0] = '\0';
|
|
pid = rb_fork_async_signal_safe(&status, chfunc, &carg, Qnil, errbuf, sizeof(errbuf));
|
|
|
|
if (pid < 0) {
|
|
int e = errno;
|
|
close(master);
|
|
close(slave);
|
|
rb_execarg_parent_end(carg.execarg_obj);
|
|
errno = e;
|
|
if (status) rb_jump_tag(status);
|
|
rb_sys_fail(errbuf[0] ? errbuf : "fork failed");
|
|
}
|
|
|
|
close(slave);
|
|
rb_execarg_parent_end(carg.execarg_obj);
|
|
|
|
info->child_pid = pid;
|
|
info->fd = master;
|
|
|
|
RB_GC_GUARD(carg.execarg_obj);
|
|
}
|
|
|
|
#if defined(HAVE_POSIX_OPENPT) || defined(HAVE_OPENPTY) || defined(HAVE_PTSNAME)
|
|
static int
|
|
no_mesg(char *slavedevice, int nomesg)
|
|
{
|
|
if (nomesg)
|
|
return chmod(slavedevice, 0600);
|
|
else
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#if defined(I_PUSH) && !defined(__linux__) && !defined(_AIX)
|
|
static inline int
|
|
ioctl_I_PUSH(int fd, const char *const name)
|
|
{
|
|
int ret = 0;
|
|
# if defined(I_FIND)
|
|
ret = ioctl(fd, I_FIND, name);
|
|
# endif
|
|
if (ret == 0) {
|
|
ret = ioctl(fd, I_PUSH, name);
|
|
}
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
get_device_once(int *master, int *slave, char SlaveName[DEVICELEN], int nomesg, int fail)
|
|
{
|
|
#if defined(HAVE_POSIX_OPENPT)
|
|
/* Unix98 PTY */
|
|
int masterfd = -1, slavefd = -1;
|
|
char *slavedevice;
|
|
|
|
#if defined(__sun) || defined(__OpenBSD__) || (defined(__FreeBSD__) && __FreeBSD_version < 902000)
|
|
/* workaround for Solaris 10: grantpt() doesn't work if FD_CLOEXEC is set. [ruby-dev:44688] */
|
|
/* FreeBSD 9.2 or later supports O_CLOEXEC
|
|
* http://www.freebsd.org/cgi/query-pr.cgi?pr=162374 */
|
|
if ((masterfd = posix_openpt(O_RDWR|O_NOCTTY)) == -1) goto error;
|
|
if (rb_grantpt(masterfd) == -1) goto error;
|
|
rb_fd_fix_cloexec(masterfd);
|
|
#else
|
|
{
|
|
int flags = O_RDWR|O_NOCTTY;
|
|
# if defined(O_CLOEXEC)
|
|
/* glibc posix_openpt() in GNU/Linux calls open("/dev/ptmx", flags) internally.
|
|
* So version dependency on GNU/Linux is same as O_CLOEXEC with open().
|
|
* O_CLOEXEC is available since Linux 2.6.23. Linux 2.6.18 silently ignore it. */
|
|
flags |= O_CLOEXEC;
|
|
# endif
|
|
if ((masterfd = posix_openpt(flags)) == -1) goto error;
|
|
}
|
|
rb_fd_fix_cloexec(masterfd);
|
|
if (rb_grantpt(masterfd) == -1) goto error;
|
|
#endif
|
|
if (unlockpt(masterfd) == -1) goto error;
|
|
if ((slavedevice = ptsname(masterfd)) == NULL) goto error;
|
|
if (no_mesg(slavedevice, nomesg) == -1) goto error;
|
|
if ((slavefd = rb_cloexec_open(slavedevice, O_RDWR|O_NOCTTY, 0)) == -1) goto error;
|
|
rb_update_max_fd(slavefd);
|
|
|
|
#if defined(I_PUSH) && !defined(__linux__) && !defined(_AIX)
|
|
if (ioctl_I_PUSH(slavefd, "ptem") == -1) goto error;
|
|
if (ioctl_I_PUSH(slavefd, "ldterm") == -1) goto error;
|
|
if (ioctl_I_PUSH(slavefd, "ttcompat") == -1) goto error;
|
|
#endif
|
|
|
|
*master = masterfd;
|
|
*slave = slavefd;
|
|
strlcpy(SlaveName, slavedevice, DEVICELEN);
|
|
return 0;
|
|
|
|
error:
|
|
if (slavefd != -1) close(slavefd);
|
|
if (masterfd != -1) close(masterfd);
|
|
if (fail) {
|
|
rb_raise(rb_eRuntimeError, "can't get Master/Slave device");
|
|
}
|
|
return -1;
|
|
#elif defined HAVE_OPENPTY
|
|
/*
|
|
* Use openpty(3) of 4.3BSD Reno and later,
|
|
* or the same interface function.
|
|
*/
|
|
if (openpty(master, slave, SlaveName,
|
|
(struct termios *)0, (struct winsize *)0) == -1) {
|
|
if (!fail) return -1;
|
|
rb_raise(rb_eRuntimeError, "openpty() failed");
|
|
}
|
|
rb_fd_fix_cloexec(*master);
|
|
rb_fd_fix_cloexec(*slave);
|
|
if (no_mesg(SlaveName, nomesg) == -1) {
|
|
if (!fail) return -1;
|
|
rb_raise(rb_eRuntimeError, "can't chmod slave pty");
|
|
}
|
|
|
|
return 0;
|
|
|
|
#elif defined HAVE__GETPTY
|
|
/* SGI IRIX */
|
|
char *name;
|
|
mode_t mode = nomesg ? 0600 : 0622;
|
|
|
|
if (!(name = _getpty(master, O_RDWR, mode, 0))) {
|
|
if (!fail) return -1;
|
|
rb_raise(rb_eRuntimeError, "_getpty() failed");
|
|
}
|
|
rb_fd_fix_cloexec(*master);
|
|
|
|
*slave = rb_cloexec_open(name, O_RDWR, 0);
|
|
/* error check? */
|
|
rb_update_max_fd(*slave);
|
|
strlcpy(SlaveName, name, DEVICELEN);
|
|
|
|
return 0;
|
|
#elif defined(HAVE_PTSNAME)
|
|
/* System V */
|
|
int masterfd = -1, slavefd = -1;
|
|
char *slavedevice;
|
|
void (*s)();
|
|
|
|
extern char *ptsname(int);
|
|
extern int unlockpt(int);
|
|
|
|
#if defined(__sun)
|
|
/* workaround for Solaris 10: grantpt() doesn't work if FD_CLOEXEC is set. [ruby-dev:44688] */
|
|
if((masterfd = open("/dev/ptmx", O_RDWR, 0)) == -1) goto error;
|
|
if(rb_grantpt(masterfd) == -1) goto error;
|
|
rb_fd_fix_cloexec(masterfd);
|
|
#else
|
|
if((masterfd = rb_cloexec_open("/dev/ptmx", O_RDWR, 0)) == -1) goto error;
|
|
rb_update_max_fd(masterfd);
|
|
if(rb_grantpt(masterfd) == -1) goto error;
|
|
#endif
|
|
if(unlockpt(masterfd) == -1) goto error;
|
|
if((slavedevice = ptsname(masterfd)) == NULL) goto error;
|
|
if (no_mesg(slavedevice, nomesg) == -1) goto error;
|
|
if((slavefd = rb_cloexec_open(slavedevice, O_RDWR, 0)) == -1) goto error;
|
|
rb_update_max_fd(slavefd);
|
|
#if defined(I_PUSH) && !defined(__linux__) && !defined(_AIX)
|
|
if(ioctl_I_PUSH(slavefd, "ptem") == -1) goto error;
|
|
if(ioctl_I_PUSH(slavefd, "ldterm") == -1) goto error;
|
|
ioctl_I_PUSH(slavefd, "ttcompat");
|
|
#endif
|
|
*master = masterfd;
|
|
*slave = slavefd;
|
|
strlcpy(SlaveName, slavedevice, DEVICELEN);
|
|
return 0;
|
|
|
|
error:
|
|
if (slavefd != -1) close(slavefd);
|
|
if (masterfd != -1) close(masterfd);
|
|
if (fail) rb_raise(rb_eRuntimeError, "can't get Master/Slave device");
|
|
return -1;
|
|
#else
|
|
/* BSD */
|
|
int masterfd = -1, slavefd = -1;
|
|
int i;
|
|
char MasterName[DEVICELEN];
|
|
|
|
#define HEX1(c) \
|
|
c"0",c"1",c"2",c"3",c"4",c"5",c"6",c"7", \
|
|
c"8",c"9",c"a",c"b",c"c",c"d",c"e",c"f"
|
|
|
|
#if defined(__hpux)
|
|
static const char MasterDevice[] = "/dev/ptym/pty%s";
|
|
static const char SlaveDevice[] = "/dev/pty/tty%s";
|
|
static const char deviceNo[][3] = {
|
|
HEX1("p"), HEX1("q"), HEX1("r"), HEX1("s"),
|
|
HEX1("t"), HEX1("u"), HEX1("v"), HEX1("w"),
|
|
};
|
|
#elif defined(_IBMESA) /* AIX/ESA */
|
|
static const char MasterDevice[] = "/dev/ptyp%s";
|
|
static const char SlaveDevice[] = "/dev/ttyp%s";
|
|
static const char deviceNo[][3] = {
|
|
HEX1("0"), HEX1("1"), HEX1("2"), HEX1("3"),
|
|
HEX1("4"), HEX1("5"), HEX1("6"), HEX1("7"),
|
|
HEX1("8"), HEX1("9"), HEX1("a"), HEX1("b"),
|
|
HEX1("c"), HEX1("d"), HEX1("e"), HEX1("f"),
|
|
};
|
|
#else /* 4.2BSD */
|
|
static const char MasterDevice[] = "/dev/pty%s";
|
|
static const char SlaveDevice[] = "/dev/tty%s";
|
|
static const char deviceNo[][3] = {
|
|
HEX1("p"), HEX1("q"), HEX1("r"), HEX1("s"),
|
|
};
|
|
#endif
|
|
#undef HEX1
|
|
for (i = 0; i < numberof(deviceNo); i++) {
|
|
const char *const devno = deviceNo[i];
|
|
snprintf(MasterName, sizeof MasterName, MasterDevice, devno);
|
|
if ((masterfd = rb_cloexec_open(MasterName,O_RDWR,0)) >= 0) {
|
|
rb_update_max_fd(masterfd);
|
|
*master = masterfd;
|
|
snprintf(SlaveName, DEVICELEN, SlaveDevice, devno);
|
|
if ((slavefd = rb_cloexec_open(SlaveName,O_RDWR,0)) >= 0) {
|
|
rb_update_max_fd(slavefd);
|
|
*slave = slavefd;
|
|
if (chown(SlaveName, getuid(), getgid()) != 0) goto error;
|
|
if (chmod(SlaveName, nomesg ? 0600 : 0622) != 0) goto error;
|
|
return 0;
|
|
}
|
|
close(masterfd);
|
|
}
|
|
}
|
|
error:
|
|
if (slavefd != -1) close(slavefd);
|
|
if (masterfd != -1) close(masterfd);
|
|
if (fail) rb_raise(rb_eRuntimeError, "can't get %s", SlaveName);
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
getDevice(int *master, int *slave, char SlaveName[DEVICELEN], int nomesg)
|
|
{
|
|
if (get_device_once(master, slave, SlaveName, nomesg, 0)) {
|
|
rb_gc();
|
|
get_device_once(master, slave, SlaveName, nomesg, 1);
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
pty_close_pty(VALUE assoc)
|
|
{
|
|
VALUE io;
|
|
int i;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
io = rb_ary_entry(assoc, i);
|
|
if (RB_TYPE_P(io, T_FILE) && 0 <= RFILE(io)->fptr->fd)
|
|
rb_io_close(io);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* PTY.open => [master_io, slave_file]
|
|
* PTY.open {|master_io, slave_file| ... } => block value
|
|
*
|
|
* Allocates a pty (pseudo-terminal).
|
|
*
|
|
* In the block form, yields two arguments <tt>master_io, slave_file</tt>
|
|
* and the value of the block is returned from +open+.
|
|
*
|
|
* The IO and File are both closed after the block completes if they haven't
|
|
* been already closed.
|
|
*
|
|
* PTY.open {|master, slave|
|
|
* p master #=> #<IO:masterpty:/dev/pts/1>
|
|
* p slave #=> #<File:/dev/pts/1>
|
|
* p slave.path #=> "/dev/pts/1"
|
|
* }
|
|
*
|
|
* In the non-block form, returns a two element array, <tt>[master_io,
|
|
* slave_file]</tt>.
|
|
*
|
|
* master, slave = PTY.open
|
|
* # do something with master for IO, or the slave file
|
|
*
|
|
* The arguments in both forms are:
|
|
*
|
|
* +master_io+:: the master of the pty, as an IO.
|
|
* +slave_file+:: the slave of the pty, as a File. The path to the
|
|
* terminal device is available via +slave_file.path+
|
|
*
|
|
* IO#raw! is usable to disable newline conversions:
|
|
*
|
|
* require 'io/console'
|
|
* PTY.open {|m, s|
|
|
* s.raw!
|
|
* ...
|
|
* }
|
|
*
|
|
*/
|
|
static VALUE
|
|
pty_open(VALUE klass)
|
|
{
|
|
int master_fd, slave_fd;
|
|
char slavename[DEVICELEN];
|
|
VALUE master_io, slave_file;
|
|
rb_io_t *master_fptr, *slave_fptr;
|
|
VALUE assoc;
|
|
|
|
getDevice(&master_fd, &slave_fd, slavename, 1);
|
|
|
|
master_io = rb_obj_alloc(rb_cIO);
|
|
MakeOpenFile(master_io, master_fptr);
|
|
master_fptr->mode = FMODE_READWRITE | FMODE_SYNC | FMODE_DUPLEX;
|
|
master_fptr->fd = master_fd;
|
|
master_fptr->pathv = rb_obj_freeze(rb_sprintf("masterpty:%s", slavename));
|
|
|
|
slave_file = rb_obj_alloc(rb_cFile);
|
|
MakeOpenFile(slave_file, slave_fptr);
|
|
slave_fptr->mode = FMODE_READWRITE | FMODE_SYNC | FMODE_DUPLEX | FMODE_TTY;
|
|
slave_fptr->fd = slave_fd;
|
|
slave_fptr->pathv = rb_obj_freeze(rb_str_new_cstr(slavename));
|
|
|
|
assoc = rb_assoc_new(master_io, slave_file);
|
|
if (rb_block_given_p()) {
|
|
return rb_ensure(rb_yield, assoc, pty_close_pty, assoc);
|
|
}
|
|
return assoc;
|
|
}
|
|
|
|
static VALUE
|
|
pty_detach_process(struct pty_info *info)
|
|
{
|
|
#ifdef WNOHANG
|
|
int st;
|
|
if (rb_waitpid(info->child_pid, &st, WNOHANG) <= 0)
|
|
return Qnil;
|
|
#endif
|
|
rb_detach_process(info->child_pid);
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* PTY.spawn(command_line) { |r, w, pid| ... }
|
|
* PTY.spawn(command_line) => [r, w, pid]
|
|
* PTY.spawn(command, arguments, ...) { |r, w, pid| ... }
|
|
* PTY.spawn(command, arguments, ...) => [r, w, pid]
|
|
*
|
|
* Spawns the specified command on a newly allocated pty. You can also use the
|
|
* alias ::getpty.
|
|
*
|
|
* The command's controlling tty is set to the slave device of the pty
|
|
* and its standard input/output/error is redirected to the slave device.
|
|
*
|
|
* +command+ and +command_line+ are the full commands to run, given a String.
|
|
* Any additional +arguments+ will be passed to the command.
|
|
*
|
|
* === Return values
|
|
*
|
|
* In the non-block form this returns an array of size three,
|
|
* <tt>[r, w, pid]</tt>.
|
|
*
|
|
* In the block form these same values will be yielded to the block:
|
|
*
|
|
* +r+:: A readable IO that contains the command's
|
|
* standard output and standard error
|
|
* +w+:: A writable IO that is the command's standard input
|
|
* +pid+:: The process identifier for the command.
|
|
*/
|
|
static VALUE
|
|
pty_getpty(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE res;
|
|
struct pty_info info;
|
|
rb_io_t *wfptr,*rfptr;
|
|
VALUE rport = rb_obj_alloc(rb_cFile);
|
|
VALUE wport = rb_obj_alloc(rb_cFile);
|
|
char SlaveName[DEVICELEN];
|
|
|
|
MakeOpenFile(rport, rfptr);
|
|
MakeOpenFile(wport, wfptr);
|
|
|
|
establishShell(argc, argv, &info, SlaveName);
|
|
|
|
rfptr->mode = rb_io_modestr_fmode("r");
|
|
rfptr->fd = info.fd;
|
|
rfptr->pathv = rb_obj_freeze(rb_str_new_cstr(SlaveName));
|
|
|
|
wfptr->mode = rb_io_modestr_fmode("w") | FMODE_SYNC;
|
|
wfptr->fd = rb_cloexec_dup(info.fd);
|
|
if (wfptr->fd == -1)
|
|
rb_sys_fail("dup()");
|
|
rb_update_max_fd(wfptr->fd);
|
|
wfptr->pathv = rfptr->pathv;
|
|
|
|
res = rb_ary_new2(3);
|
|
rb_ary_store(res,0,(VALUE)rport);
|
|
rb_ary_store(res,1,(VALUE)wport);
|
|
rb_ary_store(res,2,PIDT2NUM(info.child_pid));
|
|
|
|
if (rb_block_given_p()) {
|
|
rb_ensure(rb_yield, res, pty_detach_process, (VALUE)&info);
|
|
return Qnil;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
NORETURN(static void raise_from_check(rb_pid_t pid, int status));
|
|
static void
|
|
raise_from_check(rb_pid_t pid, int status)
|
|
{
|
|
const char *state;
|
|
VALUE msg;
|
|
VALUE exc;
|
|
|
|
#if defined(WIFSTOPPED)
|
|
#elif defined(IF_STOPPED)
|
|
#define WIFSTOPPED(status) IF_STOPPED(status)
|
|
#else
|
|
---->> Either IF_STOPPED or WIFSTOPPED is needed <<----
|
|
#endif /* WIFSTOPPED | IF_STOPPED */
|
|
if (WIFSTOPPED(status)) { /* suspend */
|
|
state = "stopped";
|
|
}
|
|
else if (kill(pid, 0) == 0) {
|
|
state = "changed";
|
|
}
|
|
else {
|
|
state = "exited";
|
|
}
|
|
msg = rb_sprintf("pty - %s: %ld", state, (long)pid);
|
|
exc = rb_exc_new_str(eChildExited, msg);
|
|
rb_iv_set(exc, "status", rb_last_status_get());
|
|
rb_exc_raise(exc);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* PTY.check(pid, raise = false) => Process::Status or nil
|
|
* PTY.check(pid, true) => nil or raises PTY::ChildExited
|
|
*
|
|
* Checks the status of the child process specified by +pid+.
|
|
* Returns +nil+ if the process is still alive.
|
|
*
|
|
* If the process is not alive, and +raise+ was true, a PTY::ChildExited
|
|
* exception will be raised. Otherwise it will return a Process::Status
|
|
* instance.
|
|
*
|
|
* +pid+:: The process id of the process to check
|
|
* +raise+:: If +true+ and the process identified by +pid+ is no longer
|
|
* alive a PTY::ChildExited is raised.
|
|
*
|
|
*/
|
|
static VALUE
|
|
pty_check(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE pid, exc;
|
|
rb_pid_t cpid;
|
|
int status;
|
|
const int flag =
|
|
#ifdef WNOHANG
|
|
WNOHANG|
|
|
#endif
|
|
#ifdef WUNTRACED
|
|
WUNTRACED|
|
|
#endif
|
|
0;
|
|
|
|
rb_scan_args(argc, argv, "11", &pid, &exc);
|
|
cpid = rb_waitpid(NUM2PIDT(pid), &status, flag);
|
|
if (cpid == -1 || cpid == 0) return Qnil;
|
|
|
|
if (!RTEST(exc)) return rb_last_status_get();
|
|
raise_from_check(cpid, status);
|
|
|
|
UNREACHABLE_RETURN(Qnil);
|
|
}
|
|
|
|
static VALUE cPTY;
|
|
|
|
/*
|
|
* Document-class: PTY::ChildExited
|
|
*
|
|
* Thrown when PTY::check is called for a pid that represents a process that
|
|
* has exited.
|
|
*/
|
|
|
|
/*
|
|
* Document-class: PTY
|
|
*
|
|
* Creates and manages pseudo terminals (PTYs). See also
|
|
* http://en.wikipedia.org/wiki/Pseudo_terminal
|
|
*
|
|
* PTY allows you to allocate new terminals using ::open or ::spawn a new
|
|
* terminal with a specific command.
|
|
*
|
|
* == Example
|
|
*
|
|
* In this example we will change the buffering type in the +factor+ command,
|
|
* assuming that factor uses stdio for stdout buffering.
|
|
*
|
|
* If IO.pipe is used instead of PTY.open, this code deadlocks because factor's
|
|
* stdout is fully buffered.
|
|
*
|
|
* # start by requiring the standard library PTY
|
|
* require 'pty'
|
|
*
|
|
* master, slave = PTY.open
|
|
* read, write = IO.pipe
|
|
* pid = spawn("factor", :in=>read, :out=>slave)
|
|
* read.close # we dont need the read
|
|
* slave.close # or the slave
|
|
*
|
|
* # pipe "42" to the factor command
|
|
* write.puts "42"
|
|
* # output the response from factor
|
|
* p master.gets #=> "42: 2 3 7\n"
|
|
*
|
|
* # pipe "144" to factor and print out the response
|
|
* write.puts "144"
|
|
* p master.gets #=> "144: 2 2 2 2 3 3\n"
|
|
* write.close # close the pipe
|
|
*
|
|
* # The result of read operation when pty slave is closed is platform
|
|
* # dependent.
|
|
* ret = begin
|
|
* master.gets # FreeBSD returns nil.
|
|
* rescue Errno::EIO # GNU/Linux raises EIO.
|
|
* nil
|
|
* end
|
|
* p ret #=> nil
|
|
*
|
|
* == License
|
|
*
|
|
* C) Copyright 1998 by Akinori Ito.
|
|
*
|
|
* This software may be redistributed freely for this purpose, in full
|
|
* or in part, provided that this entire copyright notice is included
|
|
* on any copies of this software and applications and derivations thereof.
|
|
*
|
|
* This software is provided on an "as is" basis, without warranty of any
|
|
* kind, either expressed or implied, as to any matter including, but not
|
|
* limited to warranty of fitness of purpose, or merchantability, or
|
|
* results obtained from use of this software.
|
|
*/
|
|
|
|
void
|
|
Init_pty(void)
|
|
{
|
|
cPTY = rb_define_module("PTY");
|
|
/* :nodoc: */
|
|
rb_define_module_function(cPTY,"getpty",pty_getpty,-1);
|
|
rb_define_module_function(cPTY,"spawn",pty_getpty,-1);
|
|
rb_define_singleton_method(cPTY,"check",pty_check,-1);
|
|
rb_define_singleton_method(cPTY,"open",pty_open,0);
|
|
|
|
eChildExited = rb_define_class_under(cPTY,"ChildExited",rb_eRuntimeError);
|
|
rb_define_method(eChildExited,"status",echild_status,0);
|
|
}
|