1 /*****************************************************************************
2 * filesystem.c: File system helpers
3 *****************************************************************************
4 * Copyright (C) 2005-2006 the VideoLAN team
5 * Copyright © 2005-2008 Rémi Denis-Courmont
7 * Authors: Rémi Denis-Courmont <rem # videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
31 #include <vlc_common.h>
32 #include <vlc_charset.h>
33 #include "libvlc.h" /* utf8_mkdir */
40 #include <sys/types.h>
47 #ifdef HAVE_SYS_STAT_H
48 # include <sys/stat.h>
63 # define lstat( a, b ) stat(a, b)
67 static int convert_path (const char *restrict path, wchar_t *restrict wpath)
69 if (!MultiByteToWideChar (CP_UTF8, 0, path, -1, wpath, MAX_PATH))
74 wpath[MAX_PATH] = L'\0';
77 # define CONVERT_PATH(path, wpath, err) \
78 wchar_t wpath[MAX_PATH+1]; \
79 if (convert_path (path, wpath)) \
84 * Opens a system file handle.
86 * @param filename file path to open (with UTF-8 encoding)
87 * @param flags open() flags, see the C library open() documentation
88 * @param mode file permissions if creating a new file
89 * @return a file handle on success, -1 on error (see errno).
91 int utf8_open (const char *filename, int flags, mode_t mode)
94 /*_open translates to wchar internally on WinCE*/
95 return _open (filename, flags, mode);
98 * open() cannot open files with non-“ANSI” characters on Windows.
99 * We use _wopen() instead. Same thing for mkdir() and stat().
101 CONVERT_PATH(filename, wpath, -1);
102 return _wopen (wpath, flags, mode);
105 const char *local_name = ToLocale (filename);
107 if (local_name == NULL)
113 int fd = open (local_name, flags, mode);
117 int flags = fcntl (fd, F_GETFD);
118 fcntl (fd, F_SETFD, FD_CLOEXEC | ((flags != -1) ? flags : 0));
121 LocaleFree (local_name);
126 * Opens a FILE pointer.
127 * @param filename file path, using UTF-8 encoding
128 * @param mode fopen file open mode
129 * @return NULL on error, an open FILE pointer on success.
131 FILE *utf8_fopen (const char *filename, const char *mode)
133 int rwflags = 0, oflags = 0;
136 for (const char *ptr = mode; *ptr; ptr++)
152 oflags |= O_CREAT | O_TRUNC;
167 int fd = utf8_open (filename, rwflags | oflags, 0666);
171 if (append && (lseek (fd, 0, SEEK_END) == -1))
177 FILE *stream = fdopen (fd, mode);
185 * Creates a directory using UTF-8 paths.
187 * @param dirname a UTF-8 string with the name of the directory that you
189 * @param mode directory permissions
190 * @return 0 on success, -1 on error (see errno).
192 int utf8_mkdir( const char *dirname, mode_t mode )
194 #if defined (UNDER_CE)
196 /* mkdir converts internally to wchar */
197 return _mkdir(dirname);
198 #elif defined (WIN32)
200 CONVERT_PATH (dirname, wpath, -1);
201 return _wmkdir (wpath);
204 char *locname = ToLocale( dirname );
207 if( locname == NULL )
212 res = mkdir( locname, mode );
214 LocaleFree( locname );
220 * Opens a DIR pointer.
222 * @param dirname UTF-8 representation of the directory name
223 * @return a pointer to the DIR struct, or NULL in case of error.
224 * Release with standard closedir().
226 DIR *utf8_opendir( const char *dirname )
229 CONVERT_PATH (dirname, wpath, NULL);
230 return (DIR *)vlc_wopendir (wpath);
233 const char *local_name = ToLocale( dirname );
235 if( local_name != NULL )
237 DIR *dir = opendir( local_name );
238 LocaleFree( local_name );
248 * Reads the next file name from an open directory.
250 * @param dir The directory that is being read
252 * @return a UTF-8 string of the directory entry.
253 * Use free() to free this memory.
255 char *utf8_readdir( DIR *dir )
258 struct _wdirent *ent = vlc_wreaddir (dir);
262 return FromWide (ent->d_name);
266 ent = readdir( (DIR *)dir );
270 return vlc_fix_readdir( ent->d_name );
274 static int dummy_select( const char *str )
281 * Does the same as utf8_scandir(), but takes an open directory pointer
282 * instead of a directory path.
284 int utf8_loaddir( DIR *dir, char ***namelist,
285 int (*select)( const char * ),
286 int (*compar)( const char **, const char ** ) )
289 select = dummy_select;
301 while( ( entry = utf8_readdir( dir ) ) != NULL )
305 if( !select( entry ) )
311 newtab = realloc( tab, sizeof( char * ) * (num + 1) );
322 qsort( tab, num, sizeof( tab[0] ),
323 (int (*)( const void *, const void *))compar );
331 for( i = 0; i < num; i++ )
341 * Selects file entries from a directory, as GNU C scandir().
343 * @param dirname UTF-8 diretory path
344 * @param pointer [OUT] pointer set, on succesful completion, to the address
345 * of a table of UTF-8 filenames. All filenames must be freed with free().
346 * The table itself must be freed with free() as well.
348 * @return How many file names were selected (possibly 0),
349 * or -1 in case of error.
351 int utf8_scandir( const char *dirname, char ***namelist,
352 int (*select)( const char * ),
353 int (*compar)( const char **, const char ** ) )
355 DIR *dir = utf8_opendir (dirname);
360 val = utf8_loaddir (dir, namelist, select, compar);
366 static int utf8_statEx( const char *filename, struct stat *buf,
370 /*_stat translates to wchar internally on WinCE*/
371 return _stat( filename, buf );
372 #elif defined (WIN32)
373 CONVERT_PATH (filename, wpath, -1);
374 return _wstati64 (wpath, buf);
377 #ifdef HAVE_SYS_STAT_H
378 const char *local_name = ToLocale( filename );
380 if( local_name != NULL )
382 int res = deref ? stat( local_name, buf )
383 : lstat( local_name, buf );
384 LocaleFree( local_name );
393 * Finds file/inode informations, as stat().
394 * Consider using fstat() instead, if possible.
396 * @param filename UTF-8 file path
398 int utf8_stat( const char *filename, struct stat *buf)
400 return utf8_statEx( filename, buf, true );
404 * Finds file/inode informations, as lstat().
405 * Consider using fstat() instead, if possible.
407 * @param filename UTF-8 file path
409 int utf8_lstat( const char *filename, struct stat *buf)
411 return utf8_statEx( filename, buf, false );
417 * @param filename a UTF-8 string with the name of the file you want to delete.
418 * @return A 0 return value indicates success. A -1 return value indicates an
419 * error, and an error code is stored in errno
421 int utf8_unlink( const char *filename )
424 /*_open translates to wchar internally on WinCE*/
425 return _unlink( filename );
426 #elif defined (WIN32)
427 CONVERT_PATH (filename, wpath, -1);
428 return _wunlink (wpath);
431 const char *local_name = ToLocale( filename );
433 if( local_name == NULL )
439 int ret = unlink( local_name );
440 LocaleFree( local_name );
444 int utf8_mkstemp( char *template )
446 static const char digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
447 static const int i_digits = sizeof(digits)/sizeof(*digits) - 1;
452 /* Check template validity */
453 const size_t i_length = strlen( template );
454 char *psz_rand = &template[i_length-6];
456 if( i_length < 6 || strcmp( psz_rand, "XXXXXX" ) )
463 for( int i = 0; i < 256; i++ )
465 /* Create a pseudo random file name */
468 vlc_rand_bytes( pi_rand, sizeof(pi_rand) );
469 for( int j = 0; j < 6; j++ )
470 psz_rand[j] = digits[pi_rand[j] % i_digits];
473 int fd = utf8_open( template, O_CREAT | O_EXCL | O_RDWR, 0600 );
476 if( errno != EEXIST )