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dir.c
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dir.c
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/**********************************************************************
dir.c -
$Author$
created at: Wed Jan 5 09:51:01 JST 1994
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/encoding.h"
#include "internal.h"
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#if defined HAVE_DIRENT_H && !defined _WIN32
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#elif defined HAVE_DIRECT_H && !defined _WIN32
# 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
# ifdef _WIN32
# include "win32/dir.h"
# endif
#endif
#if defined(__native_client__) && defined(NACL_NEWLIB)
# include "nacl/dirent.h"
# include "nacl/stat.h"
#endif
#include <errno.h>
#ifndef HAVE_STDLIB_H
char *getenv();
#endif
#ifndef HAVE_STRING_H
char *strchr(char*,char);
#endif
#include <ctype.h>
#include "ruby/util.h"
#if !defined HAVE_LSTAT && !defined lstat
#define lstat stat
#endif
/* define system APIs */
#ifdef _WIN32
#undef chdir
#define chdir(p) rb_w32_uchdir(p)
#undef mkdir
#define mkdir(p, m) rb_w32_umkdir((p), (m))
#undef rmdir
#define rmdir(p) rb_w32_urmdir(p)
#undef opendir
#define opendir(p) rb_w32_uopendir(p)
#endif
#ifdef __APPLE__
# define HAVE_HFS 1
#else
# define HAVE_HFS 0
#endif
#if HAVE_HFS
#include <sys/param.h>
#include <sys/mount.h>
rb_encoding *
rb_utf8mac_encoding(void)
{
static rb_encoding *utf8mac;
if (!utf8mac) utf8mac = rb_enc_find("UTF8-MAC");
return utf8mac;
}
static inline int
is_hfs(const char *path)
{
struct statfs buf;
if (statfs(path, &buf) == 0) {
return buf.f_type == 17; /* HFS on darwin */
}
return FALSE;
}
static inline int
has_nonascii(const char *ptr, size_t len)
{
while (len > 0) {
if (!ISASCII(*ptr)) return 1;
ptr++;
--len;
}
return 0;
}
# define IF_HAVE_HFS(something) something
#else
# define IF_HAVE_HFS(something) /* nothing */
#endif
#define FNM_NOESCAPE 0x01
#define FNM_PATHNAME 0x02
#define FNM_DOTMATCH 0x04
#define FNM_CASEFOLD 0x08
#define FNM_EXTGLOB 0x10
#if CASEFOLD_FILESYSTEM
#define FNM_SYSCASE FNM_CASEFOLD
#else
#define FNM_SYSCASE 0
#endif
#define FNM_NOMATCH 1
#define FNM_ERROR 2
# define Next(p, e, enc) ((p)+ rb_enc_mbclen((p), (e), (enc)))
# define Inc(p, e, enc) ((p) = Next((p), (e), (enc)))
static char *
bracket(
const char *p, /* pattern (next to '[') */
const char *pend,
const char *s, /* string */
const char *send,
int flags,
rb_encoding *enc)
{
const int nocase = flags & FNM_CASEFOLD;
const int escape = !(flags & FNM_NOESCAPE);
unsigned int c1, c2;
int r;
int ok = 0, not = 0;
if (p >= pend) return NULL;
if (*p == '!' || *p == '^') {
not = 1;
p++;
}
while (*p != ']') {
const char *t1 = p;
if (escape && *t1 == '\\')
t1++;
if (!*t1)
return NULL;
p = t1 + (r = rb_enc_mbclen(t1, pend, enc));
if (p >= pend) return NULL;
if (p[0] == '-' && p[1] != ']') {
const char *t2 = p + 1;
int r2;
if (escape && *t2 == '\\')
t2++;
if (!*t2)
return NULL;
p = t2 + (r2 = rb_enc_mbclen(t2, pend, enc));
if (ok) continue;
if ((r <= (send-s) && memcmp(t1, s, r) == 0) ||
(r2 <= (send-s) && memcmp(t2, s, r) == 0)) {
ok = 1;
continue;
}
c1 = rb_enc_codepoint(s, send, enc);
if (nocase) c1 = rb_enc_toupper(c1, enc);
c2 = rb_enc_codepoint(t1, pend, enc);
if (nocase) c2 = rb_enc_toupper(c2, enc);
if (c1 < c2) continue;
c2 = rb_enc_codepoint(t2, pend, enc);
if (nocase) c2 = rb_enc_toupper(c2, enc);
if (c1 > c2) continue;
}
else {
if (ok) continue;
if (r <= (send-s) && memcmp(t1, s, r) == 0) {
ok = 1;
continue;
}
if (!nocase) continue;
c1 = rb_enc_toupper(rb_enc_codepoint(s, send, enc), enc);
c2 = rb_enc_toupper(rb_enc_codepoint(p, pend, enc), enc);
if (c1 != c2) continue;
}
ok = 1;
}
return ok == not ? NULL : (char *)p + 1;
}
/* If FNM_PATHNAME is set, only path element will be matched. (upto '/' or '\0')
Otherwise, entire string will be matched.
End marker itself won't be compared.
And if function succeeds, *pcur reaches end marker.
*/
#define UNESCAPE(p) (escape && *(p) == '\\' ? (p) + 1 : (p))
#define ISEND(p) (!*(p) || (pathname && *(p) == '/'))
#define RETURN(val) return *pcur = p, *scur = s, (val);
static int
fnmatch_helper(
const char **pcur, /* pattern */
const char **scur, /* string */
int flags,
rb_encoding *enc)
{
const int period = !(flags & FNM_DOTMATCH);
const int pathname = flags & FNM_PATHNAME;
const int escape = !(flags & FNM_NOESCAPE);
const int nocase = flags & FNM_CASEFOLD;
const char *ptmp = 0;
const char *stmp = 0;
const char *p = *pcur;
const char *pend = p + strlen(p);
const char *s = *scur;
const char *send = s + strlen(s);
int r;
if (period && *s == '.' && *UNESCAPE(p) != '.') /* leading period */
RETURN(FNM_NOMATCH);
while (1) {
switch (*p) {
case '*':
do { p++; } while (*p == '*');
if (ISEND(UNESCAPE(p))) {
p = UNESCAPE(p);
RETURN(0);
}
if (ISEND(s))
RETURN(FNM_NOMATCH);
ptmp = p;
stmp = s;
continue;
case '?':
if (ISEND(s))
RETURN(FNM_NOMATCH);
p++;
Inc(s, send, enc);
continue;
case '[': {
const char *t;
if (ISEND(s))
RETURN(FNM_NOMATCH);
if ((t = bracket(p + 1, pend, s, send, flags, enc)) != 0) {
p = t;
Inc(s, send, enc);
continue;
}
goto failed;
}
}
/* ordinary */
p = UNESCAPE(p);
if (ISEND(s))
RETURN(ISEND(p) ? 0 : FNM_NOMATCH);
if (ISEND(p))
goto failed;
r = rb_enc_precise_mbclen(p, pend, enc);
if (!MBCLEN_CHARFOUND_P(r))
goto failed;
if (r <= (send-s) && memcmp(p, s, r) == 0) {
p += r;
s += r;
continue;
}
if (!nocase) goto failed;
if (rb_enc_toupper(rb_enc_codepoint(p, pend, enc), enc) !=
rb_enc_toupper(rb_enc_codepoint(s, send, enc), enc))
goto failed;
p += r;
Inc(s, send, enc);
continue;
failed: /* try next '*' position */
if (ptmp && stmp) {
p = ptmp;
Inc(stmp, send, enc); /* !ISEND(*stmp) */
s = stmp;
continue;
}
RETURN(FNM_NOMATCH);
}
}
static int
fnmatch(
const char *pattern,
rb_encoding *enc,
const char *string,
int flags)
{
const char *p = pattern;
const char *s = string;
const char *send = s + strlen(string);
const int period = !(flags & FNM_DOTMATCH);
const int pathname = flags & FNM_PATHNAME;
const char *ptmp = 0;
const char *stmp = 0;
if (pathname) {
while (1) {
if (p[0] == '*' && p[1] == '*' && p[2] == '/') {
do { p += 3; } while (p[0] == '*' && p[1] == '*' && p[2] == '/');
ptmp = p;
stmp = s;
}
if (fnmatch_helper(&p, &s, flags, enc) == 0) {
while (*s && *s != '/') Inc(s, send, enc);
if (*p && *s) {
p++;
s++;
continue;
}
if (!*p && !*s)
return 0;
}
/* failed : try next recursion */
if (ptmp && stmp && !(period && *stmp == '.')) {
while (*stmp && *stmp != '/') Inc(stmp, send, enc);
if (*stmp) {
p = ptmp;
stmp++;
s = stmp;
continue;
}
}
return FNM_NOMATCH;
}
}
else
return fnmatch_helper(&p, &s, flags, enc);
}
VALUE rb_cDir;
struct dir_data {
DIR *dir;
VALUE path;
rb_encoding *enc;
};
static void
dir_mark(void *ptr)
{
struct dir_data *dir = ptr;
rb_gc_mark(dir->path);
}
static void
dir_free(void *ptr)
{
struct dir_data *dir = ptr;
if (dir) {
if (dir->dir) closedir(dir->dir);
}
xfree(dir);
}
static size_t
dir_memsize(const void *ptr)
{
return ptr ? sizeof(struct dir_data) : 0;
}
static const rb_data_type_t dir_data_type = {
"dir",
{dir_mark, dir_free, dir_memsize,},
};
static VALUE dir_close(VALUE);
#define GlobPathValue(str, safe) \
/* can contain null bytes as separators */ \
(!RB_TYPE_P((str), T_STRING) ? \
(void)FilePathValue(str) : \
(void)(check_safe_glob((str), (safe)), \
check_glob_encoding(str), (str)))
#define check_safe_glob(str, safe) ((safe) ? rb_check_safe_obj(str) : (void)0)
#define check_glob_encoding(str) rb_enc_check((str), rb_enc_from_encoding(rb_usascii_encoding()))
static VALUE
dir_s_alloc(VALUE klass)
{
struct dir_data *dirp;
VALUE obj = TypedData_Make_Struct(klass, struct dir_data, &dir_data_type, dirp);
dirp->dir = NULL;
dirp->path = Qnil;
dirp->enc = NULL;
return obj;
}
/*
* call-seq:
* Dir.new( string ) -> aDir
*
* Returns a new directory object for the named directory.
*/
static VALUE
dir_initialize(int argc, VALUE *argv, VALUE dir)
{
struct dir_data *dp;
rb_encoding *fsenc;
VALUE dirname, opt, orig;
static VALUE sym_enc;
if (!sym_enc) {
sym_enc = ID2SYM(rb_intern("encoding"));
}
fsenc = rb_filesystem_encoding();
rb_scan_args(argc, argv, "1:", &dirname, &opt);
if (!NIL_P(opt)) {
VALUE enc = rb_hash_aref(opt, sym_enc);
if (!NIL_P(enc)) {
fsenc = rb_to_encoding(enc);
}
}
GlobPathValue(dirname, FALSE);
orig = rb_str_dup_frozen(dirname);
dirname = rb_str_encode_ospath(dirname);
dirname = rb_str_dup_frozen(dirname);
TypedData_Get_Struct(dir, struct dir_data, &dir_data_type, dp);
if (dp->dir) closedir(dp->dir);
dp->dir = NULL;
dp->path = Qnil;
dp->enc = fsenc;
dp->dir = opendir(RSTRING_PTR(dirname));
if (dp->dir == NULL) {
if (errno == EMFILE || errno == ENFILE) {
rb_gc();
dp->dir = opendir(RSTRING_PTR(dirname));
}
if (dp->dir == NULL) {
rb_sys_fail_path(orig);
}
}
dp->path = orig;
return dir;
}
/*
* call-seq:
* Dir.open( string ) -> aDir
* Dir.open( string ) {| aDir | block } -> anObject
*
* With no block, <code>open</code> is a synonym for
* <code>Dir::new</code>. If a block is present, it is passed
* <i>aDir</i> as a parameter. The directory is closed at the end of
* the block, and <code>Dir::open</code> returns the value of the
* block.
*/
static VALUE
dir_s_open(int argc, VALUE *argv, VALUE klass)
{
struct dir_data *dp;
VALUE dir = TypedData_Make_Struct(klass, struct dir_data, &dir_data_type, dp);
dir_initialize(argc, argv, dir);
if (rb_block_given_p()) {
return rb_ensure(rb_yield, dir, dir_close, dir);
}
return dir;
}
static void
dir_closed(void)
{
rb_raise(rb_eIOError, "closed directory");
}
static struct dir_data *
dir_check(VALUE dir)
{
struct dir_data *dirp;
if (!OBJ_UNTRUSTED(dir) && rb_safe_level() >= 4)
rb_raise(rb_eSecurityError, "Insecure: operation on trusted Dir");
rb_check_frozen(dir);
dirp = rb_check_typeddata(dir, &dir_data_type);
if (!dirp->dir) dir_closed();
return dirp;
}
#define GetDIR(obj, dirp) ((dirp) = dir_check(obj))
/*
* call-seq:
* dir.inspect -> string
*
* Return a string describing this Dir object.
*/
static VALUE
dir_inspect(VALUE dir)
{
struct dir_data *dirp;
TypedData_Get_Struct(dir, struct dir_data, &dir_data_type, dirp);
if (!NIL_P(dirp->path)) {
VALUE str = rb_str_new_cstr("#<");
rb_str_append(str, rb_class_name(CLASS_OF(dir)));
rb_str_cat2(str, ":");
rb_str_append(str, dirp->path);
rb_str_cat2(str, ">");
return str;
}
return rb_funcall(dir, rb_intern("to_s"), 0, 0);
}
/*
* call-seq:
* dir.path -> string or nil
*
* Returns the path parameter passed to <em>dir</em>'s constructor.
*
* d = Dir.new("..")
* d.path #=> ".."
*/
static VALUE
dir_path(VALUE dir)
{
struct dir_data *dirp;
TypedData_Get_Struct(dir, struct dir_data, &dir_data_type, dirp);
if (NIL_P(dirp->path)) return Qnil;
return rb_str_dup(dirp->path);
}
#if defined HAVE_READDIR_R
# define READDIR(dir, enc, entry, dp) (readdir_r((dir), (entry), &(dp)) == 0 && (dp) != 0)
#elif defined _WIN32
# define READDIR(dir, enc, entry, dp) (((dp) = rb_w32_readdir((dir), (enc))) != 0)
#else
# define READDIR(dir, enc, entry, dp) (((dp) = readdir(dir)) != 0)
#endif
#if defined HAVE_READDIR_R
# define IF_HAVE_READDIR_R(something) something
#else
# define IF_HAVE_READDIR_R(something) /* nothing */
#endif
#if defined SIZEOF_STRUCT_DIRENT_TOO_SMALL
# include <limits.h>
# define NAME_MAX_FOR_STRUCT_DIRENT 255
# if defined NAME_MAX
# if NAME_MAX_FOR_STRUCT_DIRENT < NAME_MAX
# undef NAME_MAX_FOR_STRUCT_DIRENT
# define NAME_MAX_FOR_STRUCT_DIRENT NAME_MAX
# endif
# endif
# if defined _POSIX_NAME_MAX
# if NAME_MAX_FOR_STRUCT_DIRENT < _POSIX_NAME_MAX
# undef NAME_MAX_FOR_STRUCT_DIRENT
# define NAME_MAX_FOR_STRUCT_DIRENT _POSIX_NAME_MAX
# endif
# endif
# if defined _XOPEN_NAME_MAX
# if NAME_MAX_FOR_STRUCT_DIRENT < _XOPEN_NAME_MAX
# undef NAME_MAX_FOR_STRUCT_DIRENT
# define NAME_MAX_FOR_STRUCT_DIRENT _XOPEN_NAME_MAX
# endif
# endif
# define DEFINE_STRUCT_DIRENT \
union { \
struct dirent dirent; \
char dummy[offsetof(struct dirent, d_name) + \
NAME_MAX_FOR_STRUCT_DIRENT + 1]; \
}
# define STRUCT_DIRENT(entry) ((entry).dirent)
#else
# define DEFINE_STRUCT_DIRENT struct dirent
# define STRUCT_DIRENT(entry) (entry)
#endif
/*
* call-seq:
* dir.read -> string or nil
*
* Reads the next entry from <em>dir</em> and returns it as a string.
* Returns <code>nil</code> at the end of the stream.
*
* d = Dir.new("testdir")
* d.read #=> "."
* d.read #=> ".."
* d.read #=> "config.h"
*/
static VALUE
dir_read(VALUE dir)
{
struct dir_data *dirp;
struct dirent *dp;
IF_HAVE_READDIR_R(DEFINE_STRUCT_DIRENT entry);
GetDIR(dir, dirp);
errno = 0;
if (READDIR(dirp->dir, dirp->enc, &STRUCT_DIRENT(entry), dp)) {
return rb_external_str_new_with_enc(dp->d_name, NAMLEN(dp), dirp->enc);
}
else {
if (errno != 0) rb_sys_fail(0);
return Qnil; /* end of stream */
}
}
/*
* call-seq:
* dir.each { |filename| block } -> dir
* dir.each -> an_enumerator
*
* Calls the block once for each entry in this directory, passing the
* filename of each entry as a parameter to the block.
*
* If no block is given, an enumerator is returned instead.
*
* d = Dir.new("testdir")
* d.each {|x| puts "Got #{x}" }
*
* <em>produces:</em>
*
* Got .
* Got ..
* Got config.h
* Got main.rb
*/
static VALUE
dir_each(VALUE dir)
{
struct dir_data *dirp;
struct dirent *dp;
IF_HAVE_READDIR_R(DEFINE_STRUCT_DIRENT entry);
RETURN_ENUMERATOR(dir, 0, 0);
GetDIR(dir, dirp);
rewinddir(dirp->dir);
while (READDIR(dirp->dir, dirp->enc, &STRUCT_DIRENT(entry), dp)) {
rb_yield(rb_external_str_new_with_enc(dp->d_name, NAMLEN(dp), dirp->enc));
if (dirp->dir == NULL) dir_closed();
}
return dir;
}
#ifdef HAVE_TELLDIR
/*
* call-seq:
* dir.pos -> integer
* dir.tell -> integer
*
* Returns the current position in <em>dir</em>. See also
* <code>Dir#seek</code>.
*
* d = Dir.new("testdir")
* d.tell #=> 0
* d.read #=> "."
* d.tell #=> 12
*/
static VALUE
dir_tell(VALUE dir)
{
struct dir_data *dirp;
long pos;
GetDIR(dir, dirp);
pos = telldir(dirp->dir);
return rb_int2inum(pos);
}
#else
#define dir_tell rb_f_notimplement
#endif
#ifdef HAVE_SEEKDIR
/*
* call-seq:
* dir.seek( integer ) -> dir
*
* Seeks to a particular location in <em>dir</em>. <i>integer</i>
* must be a value returned by <code>Dir#tell</code>.
*
* d = Dir.new("testdir") #=> #<Dir:0x401b3c40>
* d.read #=> "."
* i = d.tell #=> 12
* d.read #=> ".."
* d.seek(i) #=> #<Dir:0x401b3c40>
* d.read #=> ".."
*/
static VALUE
dir_seek(VALUE dir, VALUE pos)
{
struct dir_data *dirp;
long p = NUM2LONG(pos);
GetDIR(dir, dirp);
seekdir(dirp->dir, p);
return dir;
}
#else
#define dir_seek rb_f_notimplement
#endif
/*
* call-seq:
* dir.pos( integer ) -> integer
*
* Synonym for <code>Dir#seek</code>, but returns the position
* parameter.
*
* d = Dir.new("testdir") #=> #<Dir:0x401b3c40>
* d.read #=> "."
* i = d.pos #=> 12
* d.read #=> ".."
* d.pos = i #=> 12
* d.read #=> ".."
*/
static VALUE
dir_set_pos(VALUE dir, VALUE pos)
{
dir_seek(dir, pos);
return pos;
}
/*
* call-seq:
* dir.rewind -> dir
*
* Repositions <em>dir</em> to the first entry.
*
* d = Dir.new("testdir")
* d.read #=> "."
* d.rewind #=> #<Dir:0x401b3fb0>
* d.read #=> "."
*/
static VALUE
dir_rewind(VALUE dir)
{
struct dir_data *dirp;
if (rb_safe_level() >= 4 && !OBJ_UNTRUSTED(dir)) {
rb_raise(rb_eSecurityError, "Insecure: can't close");
}
GetDIR(dir, dirp);
rewinddir(dirp->dir);
return dir;
}
/*
* call-seq:
* dir.close -> nil
*
* Closes the directory stream. Any further attempts to access
* <em>dir</em> will raise an <code>IOError</code>.
*
* d = Dir.new("testdir")
* d.close #=> nil
*/
static VALUE
dir_close(VALUE dir)
{
struct dir_data *dirp;
GetDIR(dir, dirp);
closedir(dirp->dir);
dirp->dir = NULL;
return Qnil;
}
static void
dir_chdir(VALUE path)
{
if (chdir(RSTRING_PTR(path)) < 0)
rb_sys_fail_path(path);
}
static int chdir_blocking = 0;
static VALUE chdir_thread = Qnil;
struct chdir_data {
VALUE old_path, new_path;
int done;
};
static VALUE
chdir_yield(struct chdir_data *args)
{
dir_chdir(args->new_path);
args->done = TRUE;
chdir_blocking++;
if (chdir_thread == Qnil)
chdir_thread = rb_thread_current();
return rb_yield(args->new_path);
}
static VALUE
chdir_restore(struct chdir_data *args)
{
if (args->done) {
chdir_blocking--;
if (chdir_blocking == 0)
chdir_thread = Qnil;
dir_chdir(args->old_path);
}
return Qnil;
}
/*
* call-seq:
* Dir.chdir( [ string] ) -> 0
* Dir.chdir( [ string] ) {| path | block } -> anObject
*
* Changes the current working directory of the process to the given
* string. When called without an argument, changes the directory to
* the value of the environment variable <code>HOME</code>, or
* <code>LOGDIR</code>. <code>SystemCallError</code> (probably
* <code>Errno::ENOENT</code>) if the target directory does not exist.
*
* If a block is given, it is passed the name of the new current
* directory, and the block is executed with that as the current
* directory. The original working directory is restored when the block
* exits. The return value of <code>chdir</code> is the value of the
* block. <code>chdir</code> blocks can be nested, but in a
* multi-threaded program an error will be raised if a thread attempts
* to open a <code>chdir</code> block while another thread has one
* open.
*
* Dir.chdir("/var/spool/mail")
* puts Dir.pwd
* Dir.chdir("/tmp") do
* puts Dir.pwd
* Dir.chdir("/usr") do
* puts Dir.pwd
* end
* puts Dir.pwd
* end
* puts Dir.pwd
*
* <em>produces:</em>
*
* /var/spool/mail
* /tmp
* /usr
* /tmp
* /var/spool/mail
*/
static VALUE
dir_s_chdir(int argc, VALUE *argv, VALUE obj)
{
VALUE path = Qnil;
rb_secure(2);
if (rb_scan_args(argc, argv, "01", &path) == 1) {
FilePathValue(path);
path = rb_str_encode_ospath(path);
}
else {
const char *dist = getenv("HOME");
if (!dist) {
dist = getenv("LOGDIR");
if (!dist) rb_raise(rb_eArgError, "HOME/LOGDIR not set");
}
path = rb_str_new2(dist);
}
if (chdir_blocking > 0) {
if (!rb_block_given_p() || rb_thread_current() != chdir_thread)
rb_warn("conflicting chdir during another chdir block");
}
if (rb_block_given_p()) {
struct chdir_data args;
args.old_path = rb_str_encode_ospath(rb_dir_getwd());
args.new_path = path;
args.done = FALSE;
return rb_ensure(chdir_yield, (VALUE)&args, chdir_restore, (VALUE)&args);
}
dir_chdir(path);
return INT2FIX(0);
}
VALUE
rb_dir_getwd(void)
{
char *path;
VALUE cwd;
rb_secure(4);
path = my_getcwd();
cwd = rb_tainted_str_new2(path);
rb_enc_associate(cwd, rb_filesystem_encoding());
xfree(path);
return cwd;
}
/*
* call-seq:
* Dir.getwd -> string
* Dir.pwd -> string
*
* Returns the path to the current working directory of this process as
* a string.
*
* Dir.chdir("/tmp") #=> 0
* Dir.getwd #=> "/tmp"
*/
static VALUE
dir_s_getwd(VALUE dir)
{
return rb_dir_getwd();
}
static void
check_dirname(volatile VALUE *dir)
{
VALUE d = *dir;
char *path, *pend;
long len;
rb_encoding *enc;
rb_secure(2);
FilePathValue(d);
enc = rb_enc_get(d);
RSTRING_GETMEM(d, path, len);
pend = path + len;
pend = rb_enc_path_end(rb_enc_path_skip_prefix(path, pend, enc), pend, enc);
if (pend - path < len) {
d = rb_str_subseq(d, 0, pend - path);
}
*dir = rb_str_encode_ospath(d);
}
#if defined(HAVE_CHROOT)
/*
* call-seq:
* Dir.chroot( string ) -> 0
*
* Changes this process's idea of the file system root. Only a
* privileged process may make this call. Not available on all
* platforms. On Unix systems, see <code>chroot(2)</code> for more
* information.
*/
static VALUE
dir_s_chroot(VALUE dir, VALUE path)
{
check_dirname(&path);
if (chroot(RSTRING_PTR(path)) == -1)
rb_sys_fail_path(path);
return INT2FIX(0);
}
#else
#define dir_s_chroot rb_f_notimplement
#endif
/*
* call-seq:
* Dir.mkdir( string [, integer] ) -> 0
*
* Makes a new directory named by <i>string</i>, with permissions
* specified by the optional parameter <i>anInteger</i>. The
* permissions may be modified by the value of
* <code>File::umask</code>, and are ignored on NT. Raises a
* <code>SystemCallError</code> if the directory cannot be created. See
* also the discussion of permissions in the class documentation for
* <code>File</code>.
*