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ruby/dir.c

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/**********************************************************************
dir.c -
$Author$
$Date$
created at: Wed Jan 5 09:51:01 JST 1994
Copyright (C) 1993-2000 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "ruby.h"
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#else
# define MAXPATHLEN 1024
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_DIRENT_H
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#elif HAVE_DIRECT_H
# include <direct.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# if HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif
# if HAVE_SYS_DIR_H
# include <sys/dir.h>
# endif
# if HAVE_NDIR_H
# include <ndir.h>
# endif
# if defined(NT) && defined(_MSC_VER)
# include "missing/dir.h"
# endif
#endif
#include <errno.h>
#ifndef HAVE_STDLIB_H
char *getenv();
#endif
#ifndef HAVE_STRING_H
char *strchr _((char*,char));
#endif
#include <ctype.h>
#define FNM_NOESCAPE 0x01
#define FNM_PATHNAME 0x02
#define FNM_PERIOD 0x04
#define FNM_NOCASE 0x08
#define FNM_NOMATCH 1
#define FNM_ERROR 2
#define downcase(c) (nocase && isupper(c) ? tolower(c) : (c))
#if defined DOSISH
#define isdirsep(c) ((c) == '/' || (c) == '\\')
static char *
find_dirsep(s)
char *s;
{
while (*s) {
if (isdirsep(*s))
return s;
s++;
}
return 0;
}
#else
#define isdirsep(c) ((c) == '/')
#define find_dirsep(s) strchr(s, '/')
#endif
static char *
range(pat, test, flags)
char *pat;
char test;
int flags;
{
int not, ok = 0;
int nocase = flags & FNM_NOCASE;
int escape = !(flags & FNM_NOESCAPE);
not = *pat == '!' || *pat == '^';
if (not)
pat++;
test = downcase(test);
while (*pat) {
int cstart, cend;
cstart = cend = *pat++;
if (cstart == ']')
return ok == not ? 0 : pat;
else if (escape && cstart == '\\')
cstart = cend = *pat++;
if (*pat == '-' && pat[1] != ']') {
if (escape && pat[1] == '\\')
pat++;
cend = pat[1];
if (!cend)
return 0;
pat += 2;
}
if (downcase(cstart) <= test && test <= downcase(cend))
ok = 1;
}
return 0;
}
#define PERIOD(s) (period && *(s) == '.' && \
((s) == string || pathname && isdirsep(*(s))))
static int
fnmatch(pat, string, flags)
char *pat;
char *string;
int flags;
{
int c;
int test;
char *s = string;
int escape = !(flags & FNM_NOESCAPE);
int pathname = flags & FNM_PATHNAME;
int period = flags & FNM_PERIOD;
int nocase = flags & FNM_NOCASE;
while (c = *pat++) {
switch (c) {
case '?':
if (!*s || pathname && isdirsep(*s) || PERIOD(s))
return FNM_NOMATCH;
s++;
break;
case '*':
while ((c = *pat++) == '*')
;
if (PERIOD(s))
return FNM_NOMATCH;
if (!c) {
if (pathname && find_dirsep(s))
return FNM_NOMATCH;
else
return 0;
}
else if (pathname && isdirsep(c)) {
s = find_dirsep(s);
if (s)
break;
return FNM_NOMATCH;
}
test = escape && c == '\\' ? *pat : c;
test = downcase(test);
pat--;
while (*s) {
if ((c == '[' || downcase(*s) == test) &&
!fnmatch(pat, s, flags & ~FNM_PERIOD))
return 0;
else if (pathname && isdirsep(*s))
break;
s++;
}
return FNM_NOMATCH;
case '[':
if (!*s || pathname && isdirsep(*s) || PERIOD(s))
return FNM_NOMATCH;
pat = range(pat, *s, flags);
if (!pat)
return FNM_NOMATCH;
s++;
break;
case '\\':
if (escape
#if defined DOSISH
&& *pat && strchr("*?[\\", *pat)
#endif
) {
c = *pat;
if (!c)
c = '\\';
else
pat++;
}
/* FALLTHROUGH */
default:
#if defined DOSISH
if (pathname && isdirsep(c) && isdirsep(*s))
;
else
#endif
if(downcase(c) != downcase(*s))
return FNM_NOMATCH;
s++;
break;
}
}
return !*s ? 0 : FNM_NOMATCH;
}
VALUE rb_cDir;
static void
free_dir(dir)
DIR *dir;
{
if (dir) closedir(dir);
}
static VALUE dir_close _((VALUE));
static VALUE
dir_s_new(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
VALUE obj = Data_Wrap_Struct(klass, 0, free_dir, 0);
rb_obj_call_init(obj, argc, argv);
return obj;
}
static VALUE
dir_initialize(dir, dirname)
VALUE dir, dirname;
{
DIR *dirp;
Check_SafeStr(dirname);
if (DATA_PTR(dir)) closedir(DATA_PTR(dir));
DATA_PTR(dir) = NULL;
dirp = opendir(RSTRING(dirname)->ptr);
if (dirp == NULL) {
if (errno == EMFILE || errno == ENFILE) {
rb_gc();
dirp = opendir(RSTRING(dirname)->ptr);
}
if (dirp == NULL) {
rb_sys_fail(RSTRING(dirname)->ptr);
}
}
DATA_PTR(dir) = dirp;
return dir;
}
static VALUE
dir_s_open(klass, dirname)
VALUE klass, dirname;
{
VALUE dir = Data_Wrap_Struct(klass, 0, free_dir, 0);
dir_initialize(dir, dirname);
if (rb_block_given_p()) {
rb_ensure(rb_yield, dir, dir_close, dir);
return Qnil;
}
return dir;
}
static void
dir_closed()
{
rb_raise(rb_eIOError, "closed directory");
}
#define GetDIR(obj, dirp) {\
Data_Get_Struct(obj, DIR, dirp);\
if (dirp == NULL) dir_closed();\
}
static VALUE
dir_read(dir)
VALUE dir;
{
DIR *dirp;
struct dirent *dp;
GetDIR(dir, dirp);
errno = 0;
dp = readdir(dirp);
if (dp)
return rb_tainted_str_new(dp->d_name, NAMLEN(dp));
else if (errno == 0) { /* end of stream */
return Qnil;
}
else {
rb_sys_fail(0);
}
return Qnil; /* not reached */
}
static VALUE
dir_each(dir)
VALUE dir;
{
DIR *dirp;
struct dirent *dp;
GetDIR(dir, dirp);
for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
rb_yield(rb_tainted_str_new(dp->d_name, NAMLEN(dp)));
if (DATA_PTR(dir) == NULL) dir_closed();
}
return dir;
}
static VALUE
dir_tell(dir)
VALUE dir;
{
#ifdef HAVE_TELLDIR
DIR *dirp;
long pos;
GetDIR(dir, dirp);
pos = telldir(dirp);
return rb_int2inum(pos);
#else
rb_notimplement();
#endif
}
static VALUE
dir_seek(dir, pos)
VALUE dir, pos;
{
DIR *dirp;
#ifdef HAVE_SEEKDIR
GetDIR(dir, dirp);
seekdir(dirp, NUM2INT(pos));
return dir;
#else
rb_notimplement();
#endif
}
static VALUE
dir_rewind(dir)
VALUE dir;
{
DIR *dirp;
GetDIR(dir, dirp);
rewinddir(dirp);
return dir;
}
static VALUE
dir_close(dir)
VALUE dir;
{
DIR *dirp;
Data_Get_Struct(dir, DIR, dirp);
if (dirp == NULL) dir_closed();
closedir(dirp);
DATA_PTR(dir) = NULL;
return Qnil;
}
static VALUE
dir_s_chdir(argc, argv, obj)
int argc;
VALUE *argv;
VALUE obj;
{
VALUE path;
char *dist = "";
rb_secure(2);
if (rb_scan_args(argc, argv, "01", &path) == 1) {
Check_SafeStr(path);
dist = RSTRING(path)->ptr;
}
else {
dist = getenv("HOME");
if (!dist) {
dist = getenv("LOGDIR");
}
}
if (chdir(dist) < 0)
rb_sys_fail(dist);
return INT2FIX(0);
}
static VALUE
dir_s_getwd(dir)
VALUE dir;
{
char path[MAXPATHLEN];
#ifdef HAVE_GETCWD
if (getcwd(path, sizeof(path)) == 0) rb_sys_fail(path);
#else
extern char *getwd();
if (getwd(path) == 0) rb_sys_fail(path);
#endif
return rb_tainted_str_new2(path);
}
static VALUE
dir_s_chroot(dir, path)
VALUE dir, path;
{
#if defined(HAVE_CHROOT) && !defined(__CHECKER__)
rb_secure(2);
Check_SafeStr(path);
if (chroot(RSTRING(path)->ptr) == -1)
rb_sys_fail(RSTRING(path)->ptr);
return INT2FIX(0);
#else
rb_notimplement();
return Qnil; /* not reached */
#endif
}
static VALUE
dir_s_mkdir(argc, argv, obj)
int argc;
VALUE *argv;
VALUE obj;
{
VALUE path, vmode;
int mode;
if (rb_scan_args(argc, argv, "11", &path, &vmode) == 2) {
mode = NUM2INT(vmode);
}
else {
mode = 0777;
}
Check_SafeStr(path);
rb_secure(2);
#if !defined(NT)
if (mkdir(RSTRING(path)->ptr, mode) == -1)
rb_sys_fail(RSTRING(path)->ptr);
#else
if (mkdir(RSTRING(path)->ptr) == -1)
rb_sys_fail(RSTRING(path)->ptr);
#endif
return INT2FIX(0);
}
static VALUE
dir_s_rmdir(obj, dir)
VALUE obj, dir;
{
Check_SafeStr(dir);
rb_secure(2);
if (rmdir(RSTRING(dir)->ptr) < 0)
rb_sys_fail(RSTRING(dir)->ptr);
return INT2FIX(0);
}
/* Return nonzero if S has any special globbing chars in it. */
static int
has_magic(s, send)
char *s, *send;
{
register char *p = s;
register char c;
int open = 0;
while ((c = *p++) != '\0') {
switch (c) {
case '?':
case '*':
return Qtrue;
case '[': /* Only accept an open brace if there is a close */
open++; /* brace to match it. Bracket expressions must be */
continue; /* complete, according to Posix.2 */
case ']':
if (open)
return Qtrue;
continue;
case '\\':
if (*p++ == '\0')
return Qfalse;
}
if (send && p >= send) break;
}
return Qfalse;
}
static char*
extract_path(p, pend)
char *p, *pend;
{
char *alloc;
int len;
len = pend - p;
alloc = ALLOC_N(char, len+1);
memcpy(alloc, p, len);
if (len > 1 && pend[-1] == '/') {
alloc[len-1] = 0;
}
else {
alloc[len] = 0;
}
return alloc;
}
static char*
extract_elem(path)
char *path;
{
char *pend;
pend = strchr(path, '/');
if (!pend) pend = path + strlen(path);
return extract_path(path, pend);
}
#ifndef S_ISDIR
# define S_ISDIR(m) ((m & S_IFMT) == S_IFDIR)
#endif
void
rb_glob_helper(path, flag, func, arg)
char *path;
int flag;
void (*func)();
VALUE arg;
{
struct stat st;
char *p, *m;
if (!has_magic(path, 0)) {
if (stat(path, &st) == 0) {
(*func)(path, arg);
}
return;
}
p = path;
while (p) {
if (*p == '/') p++;
m = strchr(p, '/');
if (has_magic(p, m)) {
char *dir, *base, *magic, *buf;
DIR *dirp;
struct dirent *dp;
int recursive = 0;
struct d_link {
char *path;
struct d_link *next;
} *tmp, *link = 0;
base = extract_path(path, p);
if (path == p) dir = ".";
else dir = base;
magic = extract_elem(p);
if (m && strcmp(magic, "**") == 0) {
recursive = 1;
buf = ALLOC_N(char, strlen(base)+strlen(m)+3);
sprintf(buf, "%s%s%s", base, (*base)?"":".", m);
rb_glob_helper(buf, flag, func, arg);
free(buf);
}
dirp = opendir(dir);
if (dirp == NULL) {
free(base);
break;
}
#define BASE (*base && !(*base == '/' && !base[1]))
for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
if (recursive) {
if (strcmp(".", dp->d_name) == 0 || strcmp("..", dp->d_name) == 0)
continue;
buf = ALLOC_N(char, strlen(base)+NAMLEN(dp)+strlen(m)+6);
sprintf(buf, "%s%s%s/**%s", base, (BASE)?"/":"", dp->d_name, m);
rb_glob_helper(buf, flag, func, arg);
free(buf);
continue;
}
if (fnmatch(magic, dp->d_name, flag) == 0) {
buf = ALLOC_N(char, strlen(base)+NAMLEN(dp)+2);
sprintf(buf, "%s%s%s", base, (BASE)?"/":"", dp->d_name);
if (!m) {
(*func)(buf, arg);
free(buf);
continue;
}
tmp = ALLOC(struct d_link);
tmp->path = buf;
tmp->next = link;
link = tmp;
}
}
closedir(dirp);
free(base);
free(magic);
while (link) {
stat(link->path, &st); /* should success */
if (S_ISDIR(st.st_mode)) {
int len = strlen(link->path);
int mlen = strlen(m);
char *t = ALLOC_N(char, len+mlen+1);
sprintf(t, "%s%s", link->path, m);
rb_glob_helper(t, flag, func, arg);
free(t);
}
tmp = link;
link = link->next;
free(tmp->path);
free(tmp);
}
}
p = m;
}
}
void
rb_glob(path, func, arg)
char *path;
void (*func)();
VALUE arg;
{
rb_glob_helper(path, FNM_PERIOD|FNM_PATHNAME, func, arg);
}
void
rb_iglob(path, func, arg)
char *path;
void (*func)();
VALUE arg;
{
rb_glob_helper(path, FNM_PERIOD|FNM_PATHNAME|FNM_NOCASE, func, arg);
}
static void
push_pattern(path, ary)
char *path;
VALUE ary;
{
rb_ary_push(ary, rb_tainted_str_new2(path));
}
static void
push_globs(ary, s)
VALUE ary;
char *s;
{
rb_glob(s, push_pattern, ary);
}
static void
push_braces(ary, s)
VALUE ary;
char *s;
{
char buffer[MAXPATHLEN], *buf = buffer;
char *p, *t, *b;
char *lbrace, *rbrace;
int nest = 0;
p = s;
lbrace = rbrace = 0;
while (*p) {
if (*p == '{') {
lbrace = p;
break;
}
p++;
}
while (*p) {
if (*p == '{') nest++;
if (*p == '}' && --nest == 0) {
rbrace = p;
break;
}
p++;
}
if (lbrace) {
int len = strlen(s);
if (len >= MAXPATHLEN)
buf = xmalloc(len + 1);
memcpy(buf, s, lbrace-s);
b = buf + (lbrace-s);
p = lbrace;
while (*p != '}') {
t = p + 1;
for (p = t; *p!='}' && *p!=','; p++) {
/* skip inner braces */
if (*p == '{') while (*p!='}') p++;
}
memcpy(b, t, p-t);
strcpy(b+(p-t), rbrace+1);
push_braces(ary, buf);
}
if (buf != buffer)
free(buf);
}
else {
push_globs(ary, s);
}
}
#define isdelim(c) ((c)==' '||(c)=='\t'||(c)=='\n'||(c)=='\0')
static VALUE
dir_s_glob(dir, str)
VALUE dir, str;
{
char *p, *pend;
char buffer[MAXPATHLEN], *buf = buffer;
char *t;
int nest;
VALUE ary;
Check_SafeStr(str);
ary = rb_ary_new();
if (RSTRING(str)->len >= MAXPATHLEN)
buf = xmalloc(RSTRING(str)->len + 1);
p = RSTRING(str)->ptr;
pend = p + RSTRING(str)->len;
while (p < pend) {
t = buf;
nest = 0;
while (p < pend && isdelim(*p)) p++;
while (p < pend && !isdelim(*p)) {
if (*p == '{') nest+=2;
if (*p == '}') nest+=3;
*t++ = *p++;
}
*t = '\0';
if (nest == 0) {
push_globs(ary, buf);
}
else if (nest % 5 == 0) {
push_braces(ary, buf);
}
/* else unmatched braces */
}
if (buf != buffer)
free(buf);
if (rb_block_given_p()) {
long len = RARRAY(ary)->len;
VALUE *ptr = RARRAY(ary)->ptr;
while (len--) {
rb_yield(*ptr++);
}
}
return ary;
}
static VALUE
dir_foreach(io, dirname)
VALUE io, dirname;
{
VALUE dir;
dir = rb_funcall(rb_cDir, rb_intern("open"), 1, dirname);
rb_ensure(dir_each, dir, dir_close, dir);
return Qnil;
}
static VALUE
dir_entries(io, dirname)
VALUE io, dirname;
{
VALUE dir;
dir = rb_funcall(rb_cDir, rb_intern("open"), 1, dirname);
return rb_ensure(rb_Array, dir, dir_close, dir);
}
void
Init_Dir()
{
rb_cDir = rb_define_class("Dir", rb_cObject);
rb_include_module(rb_cDir, rb_mEnumerable);
rb_define_singleton_method(rb_cDir, "new", dir_s_new, -1);
rb_define_singleton_method(rb_cDir, "open", dir_s_open, 1);
rb_define_singleton_method(rb_cDir, "foreach", dir_foreach, 1);
rb_define_singleton_method(rb_cDir, "entries", dir_entries, 1);
rb_define_method(rb_cDir,"initialize", dir_initialize, 1);
rb_define_method(rb_cDir,"read", dir_read, 0);
rb_define_method(rb_cDir,"each", dir_each, 0);
rb_define_method(rb_cDir,"rewind", dir_rewind, 0);
rb_define_method(rb_cDir,"tell", dir_tell, 0);
rb_define_method(rb_cDir,"seek", dir_seek, 1);
rb_define_method(rb_cDir,"pos", dir_tell, 0);
rb_define_method(rb_cDir,"pos=", dir_seek, 1);
rb_define_method(rb_cDir,"close", dir_close, 0);
rb_define_singleton_method(rb_cDir,"chdir", dir_s_chdir, -1);
rb_define_singleton_method(rb_cDir,"getwd", dir_s_getwd, 0);
rb_define_singleton_method(rb_cDir,"pwd", dir_s_getwd, 0);
rb_define_singleton_method(rb_cDir,"chroot", dir_s_chroot, 1);
rb_define_singleton_method(rb_cDir,"mkdir", dir_s_mkdir, -1);
rb_define_singleton_method(rb_cDir,"rmdir", dir_s_rmdir, 1);
rb_define_singleton_method(rb_cDir,"delete", dir_s_rmdir, 1);
rb_define_singleton_method(rb_cDir,"unlink", dir_s_rmdir, 1);
rb_define_singleton_method(rb_cDir,"glob", dir_s_glob, 1);
rb_define_singleton_method(rb_cDir,"[]", dir_s_glob, 1);
}
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