1 /* gstdio.c - wrappers for C library functions
3 * Copyright 2004 Tor Lillqvist
5 * GLib is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU Lesser General Public License as
7 * published by the Free Software Foundation; either version 2 of the
8 * License, or (at your option) any later version.
10 * GLib is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with GLib; see the file COPYING.LIB. If not,
17 * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
22 #include "glibconfig.h"
24 #define G_STDIO_NO_WRAP_ON_UNIX
26 #include <sys/types.h>
40 #include <sys/utime.h>
48 #if !defined (G_OS_UNIX) && !defined (G_OS_WIN32) && !defined (G_OS_BEOS)
49 #error Please port this to your operating system
52 #if defined (_MSC_VER) && !defined(_WIN64)
54 #define _wstat _wstat32
59 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
60 * @mode: as in access()
62 * A wrapper for the POSIX access() function. This function is used to
63 * test a pathname for one or several of read, write or execute
64 * permissions, or just existence.
66 * On Windows, the file protection mechanism is not at all POSIX-like,
67 * and the underlying function in the C library only checks the
68 * FAT-style READONLY attribute, and does not look at the ACL of a
69 * file at all. This function is this in practise almost useless on
70 * Windows. Software that needs to handle file permissions on Windows
71 * more exactly should use the Win32 API.
73 * See your C library manual for more details about access().
75 * Returns: zero if the pathname refers to an existing file system
76 * object that has all the tested permissions, or -1 otherwise or on
82 g_access (const gchar *filename,
86 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
90 if (wfilename == NULL)
100 retval = _waccess (wfilename, mode & ~X_OK);
108 return access (filename, mode);
114 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
115 * @mode: as in chmod()
117 * A wrapper for the POSIX chmod() function. The chmod() function is
118 * used to set the permissions of a file system object.
120 * On Windows the file protection mechanism is not at all POSIX-like,
121 * and the underlying chmod() function in the C library just sets or
122 * clears the FAT-style READONLY attribute. It does not touch any
123 * ACL. Software that needs to manage file permissions on Windows
124 * exactly should use the Win32 API.
126 * See your C library manual for more details about chmod().
128 * Returns: zero if the operation succeeded, -1 on error.
133 g_chmod (const gchar *filename,
137 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
141 if (wfilename == NULL)
147 retval = _wchmod (wfilename, mode);
155 return chmod (filename, mode);
160 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
161 * @flags: as in open()
162 * @mode: as in open()
164 * A wrapper for the POSIX open() function. The open() function is
165 * used to convert a pathname into a file descriptor.
167 * On POSIX systems file descriptors are implemented by the operating
168 * system. On Windows, it's the C library that implements open() and
169 * file descriptors. The actual Win32 API for opening files is quite
170 * different, see MSDN documentation for CreateFile(). The Win32 API
171 * uses file handles, which are more randomish integers, not small
172 * integers like file descriptors.
174 * Because file descriptors are specific to the C library on Windows,
175 * the file descriptor returned by this function makes sense only to
176 * functions in the same C library. Thus if the GLib-using code uses a
177 * different C library than GLib does, the file descriptor returned by
178 * this function cannot be passed to C library functions like write()
181 * See your C library manual for more details about open().
183 * Returns: a new file descriptor, or -1 if an error occurred. The
184 * return value can be used exactly like the return value from open().
189 g_open (const gchar *filename,
194 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
198 if (wfilename == NULL)
204 retval = _wopen (wfilename, flags, mode);
212 return open (filename, flags, mode);
218 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
219 * @mode: as in creat()
221 * A wrapper for the POSIX creat() function. The creat() function is
222 * used to convert a pathname into a file descriptor, creating a file
225 * On POSIX systems file descriptors are implemented by the operating
226 * system. On Windows, it's the C library that implements creat() and
227 * file descriptors. The actual Windows API for opening files is
228 * different, see MSDN documentation for CreateFile(). The Win32 API
229 * uses file handles, which are more randomish integers, not small
230 * integers like file descriptors.
232 * Because file descriptors are specific to the C library on Windows,
233 * the file descriptor returned by this function makes sense only to
234 * functions in the same C library. Thus if the GLib-using code uses a
235 * different C library than GLib does, the file descriptor returned by
236 * this function cannot be passed to C library functions like write()
239 * See your C library manual for more details about creat().
241 * Returns: a new file descriptor, or -1 if an error occurred. The
242 * return value can be used exactly like the return value from creat().
247 g_creat (const gchar *filename,
251 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
255 if (wfilename == NULL)
261 retval = _wcreat (wfilename, mode);
269 return creat (filename, mode);
275 * @oldfilename: a pathname in the GLib file name encoding (UTF-8 on Windows)
276 * @newfilename: a pathname in the GLib file name encoding
278 * A wrapper for the POSIX rename() function. The rename() function
279 * renames a file, moving it between directories if required.
281 * See your C library manual for more details about how rename() works
282 * on your system. It is not possible in general on Windows to rename
283 * a file that is open to some process.
285 * Returns: 0 if the renaming succeeded, -1 if an error occurred
290 g_rename (const gchar *oldfilename,
291 const gchar *newfilename)
294 wchar_t *woldfilename = g_utf8_to_utf16 (oldfilename, -1, NULL, NULL, NULL);
295 wchar_t *wnewfilename;
299 if (woldfilename == NULL)
305 wnewfilename = g_utf8_to_utf16 (newfilename, -1, NULL, NULL, NULL);
307 if (wnewfilename == NULL)
309 g_free (woldfilename);
314 if (MoveFileExW (woldfilename, wnewfilename, MOVEFILE_REPLACE_EXISTING))
319 switch (GetLastError ())
321 #define CASE(a,b) case ERROR_##a: save_errno = b; break
322 CASE (FILE_NOT_FOUND, ENOENT);
323 CASE (PATH_NOT_FOUND, ENOENT);
324 CASE (ACCESS_DENIED, EACCES);
325 CASE (NOT_SAME_DEVICE, EXDEV);
326 CASE (LOCK_VIOLATION, EACCES);
327 CASE (SHARING_VIOLATION, EACCES);
328 CASE (FILE_EXISTS, EEXIST);
329 CASE (ALREADY_EXISTS, EEXIST);
331 default: save_errno = EIO;
335 g_free (woldfilename);
336 g_free (wnewfilename);
341 return rename (oldfilename, newfilename);
347 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
348 * @mode: permissions to use for the newly created directory
350 * A wrapper for the POSIX mkdir() function. The mkdir() function
351 * attempts to create a directory with the given name and permissions.
352 * The mode argument is ignored on Windows.
354 * See your C library manual for more details about mkdir().
356 * Returns: 0 if the directory was successfully created, -1 if an error
362 g_mkdir (const gchar *filename,
366 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
370 if (wfilename == NULL)
376 retval = _wmkdir (wfilename);
384 return mkdir (filename, mode);
390 * @path: a pathname in the GLib file name encoding (UTF-8 on Windows)
392 * A wrapper for the POSIX chdir() function. The function changes the
393 * current directory of the process to @path.
395 * See your C library manual for more details about chdir().
397 * Returns: 0 on success, -1 if an error occurred.
402 g_chdir (const gchar *path)
405 wchar_t *wpath = g_utf8_to_utf16 (path, -1, NULL, NULL, NULL);
415 retval = _wchdir (wpath);
430 * A type corresponding to the appropriate struct type for the stat
431 * system call, depending on the platform and/or compiler being used.
433 * See g_stat() for more information.
437 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
438 * @buf: a pointer to a <structname>stat</structname> struct, which
439 * will be filled with the file information
441 * A wrapper for the POSIX stat() function. The stat() function
442 * returns information about a file. On Windows the stat() function in
443 * the C library checks only the FAT-style READONLY attribute and does
444 * not look at the ACL at all. Thus on Windows the protection bits in
445 * the st_mode field are a fabrication of little use.
447 * On Windows the Microsoft C libraries have several variants of the
448 * <structname>stat</structname> struct and stat() function with names
449 * like "_stat", "_stat32", "_stat32i64" and "_stat64i32". The one
450 * used here is for 32-bit code the one with 32-bit size and time
451 * fields, specifically called "_stat32".
453 * In Microsoft's compiler, by default "struct stat" means one with
454 * 64-bit time fields while in MinGW "struct stat" is the legacy one
455 * with 32-bit fields. To hopefully clear up this messs, the gstdio.h
456 * header defines a type GStatBuf which is the appropriate struct type
457 * depending on the platform and/or compiler being used. On POSIX it
458 * is just "struct stat", but note that even on POSIX platforms,
459 * "stat" might be a macro.
461 * See your C library manual for more details about stat().
463 * Returns: 0 if the information was successfully retrieved, -1 if an error
469 g_stat (const gchar *filename,
473 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
478 if (wfilename == NULL)
484 len = wcslen (wfilename);
485 while (len > 0 && G_IS_DIR_SEPARATOR (wfilename[len-1]))
488 (!g_path_is_absolute (filename) || len > g_path_skip_root (filename) - filename))
489 wfilename[len] = '\0';
491 retval = _wstat (wfilename, buf);
499 return stat (filename, buf);
505 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
506 * @buf: a pointer to a <structname>stat</structname> struct, which
507 * will be filled with the file information
509 * A wrapper for the POSIX lstat() function. The lstat() function is
510 * like stat() except that in the case of symbolic links, it returns
511 * information about the symbolic link itself and not the file that it
512 * refers to. If the system does not support symbolic links g_lstat()
513 * is identical to g_stat().
515 * See your C library manual for more details about lstat().
517 * Returns: 0 if the information was successfully retrieved, -1 if an error
523 g_lstat (const gchar *filename,
527 /* This can't be Win32, so don't do the widechar dance. */
528 return lstat (filename, buf);
530 return g_stat (filename, buf);
536 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
538 * A wrapper for the POSIX unlink() function. The unlink() function
539 * deletes a name from the filesystem. If this was the last link to the
540 * file and no processes have it opened, the diskspace occupied by the
543 * See your C library manual for more details about unlink(). Note
544 * that on Windows, it is in general not possible to delete files that
545 * are open to some process, or mapped into memory.
547 * Returns: 0 if the name was successfully deleted, -1 if an error
553 g_unlink (const gchar *filename)
556 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
560 if (wfilename == NULL)
566 retval = _wunlink (wfilename);
574 return unlink (filename);
580 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
582 * A wrapper for the POSIX remove() function. The remove() function
583 * deletes a name from the filesystem.
585 * See your C library manual for more details about how remove() works
586 * on your system. On Unix, remove() removes also directories, as it
587 * calls unlink() for files and rmdir() for directories. On Windows,
588 * although remove() in the C library only works for files, this
589 * function tries first remove() and then if that fails rmdir(), and
590 * thus works for both files and directories. Note however, that on
591 * Windows, it is in general not possible to remove a file that is
592 * open to some process, or mapped into memory.
594 * If this function fails on Windows you can't infer too much from the
595 * errno value. rmdir() is tried regardless of what caused remove() to
596 * fail. Any errno value set by remove() will be overwritten by that
599 * Returns: 0 if the file was successfully removed, -1 if an error
605 g_remove (const gchar *filename)
608 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
612 if (wfilename == NULL)
618 retval = _wremove (wfilename);
620 retval = _wrmdir (wfilename);
628 return remove (filename);
634 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
636 * A wrapper for the POSIX rmdir() function. The rmdir() function
637 * deletes a directory from the filesystem.
639 * See your C library manual for more details about how rmdir() works
642 * Returns: 0 if the directory was successfully removed, -1 if an error
648 g_rmdir (const gchar *filename)
651 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
655 if (wfilename == NULL)
661 retval = _wrmdir (wfilename);
669 return rmdir (filename);
675 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
676 * @mode: a string describing the mode in which the file should be
679 * A wrapper for the stdio fopen() function. The fopen() function
680 * opens a file and associates a new stream with it.
682 * Because file descriptors are specific to the C library on Windows,
683 * and a file descriptor is partof the <type>FILE</type> struct, the
684 * <type>FILE</type> pointer returned by this function makes sense
685 * only to functions in the same C library. Thus if the GLib-using
686 * code uses a different C library than GLib does, the
687 * <type>FILE</type> pointer returned by this function cannot be
688 * passed to C library functions like fprintf() or fread().
690 * See your C library manual for more details about fopen().
692 * Returns: A <type>FILE</type> pointer if the file was successfully
693 * opened, or %NULL if an error occurred
698 g_fopen (const gchar *filename,
702 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
707 if (wfilename == NULL)
713 wmode = g_utf8_to_utf16 (mode, -1, NULL, NULL, NULL);
722 retval = _wfopen (wfilename, wmode);
731 return fopen (filename, mode);
737 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
738 * @mode: a string describing the mode in which the file should be
740 * @stream: an existing stream which will be reused, or %NULL
742 * A wrapper for the POSIX freopen() function. The freopen() function
743 * opens a file and associates it with an existing stream.
745 * See your C library manual for more details about freopen().
747 * Returns: A <literal>FILE</literal> pointer if the file was successfully
748 * opened, or %NULL if an error occurred.
753 g_freopen (const gchar *filename,
758 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
763 if (wfilename == NULL)
769 wmode = g_utf8_to_utf16 (mode, -1, NULL, NULL, NULL);
778 retval = _wfreopen (wfilename, wmode, stream);
787 return freopen (filename, mode, stream);
793 * @filename: a pathname in the GLib file name encoding (UTF-8 on Windows)
794 * @utb: a pointer to a struct utimbuf.
796 * A wrapper for the POSIX utime() function. The utime() function
797 * sets the access and modification timestamps of a file.
799 * See your C library manual for more details about how utime() works
802 * Returns: 0 if the operation was successful, -1 if an error
808 g_utime (const gchar *filename,
812 wchar_t *wfilename = g_utf8_to_utf16 (filename, -1, NULL, NULL, NULL);
816 if (wfilename == NULL)
822 retval = _wutime (wfilename, (struct _utimbuf*) utb);
830 return utime (filename, utb);