/*****************************************************************************
- * filesystem.c: File system helpers
+ * filesystem.c: Common file system helpers
*****************************************************************************
- * Copyright (C) 2005-2006 the VideoLAN team
+ * Copyright (C) 2005-2006 VLC authors and VideoLAN
* Copyright © 2005-2008 Rémi Denis-Courmont
*
* Authors: Rémi Denis-Courmont <rem # videolan.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
#endif
#include <vlc_common.h>
-#include <vlc_charset.h>
-#include "libvlc.h" /* utf8_mkdir */
+#include <vlc_fs.h>
+#include <vlc_rand.h>
#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
-#ifdef HAVE_DIRENT_H
-# include <dirent.h>
-#endif
-#ifdef UNDER_CE
-# include <tchar.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-# include <sys/stat.h>
-#endif
-#ifdef HAVE_FCNTL_H
-# include <fcntl.h>
-#endif
-#ifdef WIN32
-# include <io.h>
-# include <direct.h>
-#else
+#include <fcntl.h>
+#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
-#ifndef HAVE_LSTAT
-# define lstat( a, b ) stat(a, b)
-#endif
-
-#ifdef WIN32
-static int convert_path (const char *restrict path, wchar_t *restrict wpath)
-{
- if (!MultiByteToWideChar (CP_UTF8, 0, path, -1, wpath, MAX_PATH))
- {
- errno = ENOENT;
- return -1;
- }
- wpath[MAX_PATH] = L'\0';
- return 0;
-}
-# define CONVERT_PATH(path, wpath, err) \
- wchar_t wpath[MAX_PATH+1]; \
- if (convert_path (path, wpath)) \
- return (err)
-#endif
-
-/**
- * Opens a system file handle.
- *
- * @param filename file path to open (with UTF-8 encoding)
- * @param flags open() flags, see the C library open() documentation
- * @param mode file permissions if creating a new file
- * @return a file handle on success, -1 on error (see errno).
- */
-int utf8_open (const char *filename, int flags, mode_t mode)
-{
-#ifdef UNDER_CE
- /*_open translates to wchar internally on WinCE*/
- return _open (filename, flags, mode);
-#elif defined (WIN32)
- /*
- * open() cannot open files with non-“ANSI” characters on Windows.
- * We use _wopen() instead. Same thing for mkdir() and stat().
- */
- CONVERT_PATH(filename, wpath, -1);
- return _wopen (wpath, flags, mode);
-
-#endif
- const char *local_name = ToLocale (filename);
-
- if (local_name == NULL)
- {
- errno = ENOENT;
- return -1;
- }
-
- int fd = open (local_name, flags, mode);
- LocaleFree (local_name);
- return fd;
-}
-
/**
* Opens a FILE pointer.
* @param filename file path, using UTF-8 encoding
* @param mode fopen file open mode
* @return NULL on error, an open FILE pointer on success.
*/
-FILE *utf8_fopen (const char *filename, const char *mode)
+FILE *vlc_fopen (const char *filename, const char *mode)
{
int rwflags = 0, oflags = 0;
- bool append = false;
for (const char *ptr = mode; *ptr; ptr++)
{
case 'a':
rwflags = O_WRONLY;
- oflags |= O_CREAT;
- append = true;
+ oflags |= O_CREAT | O_APPEND;
break;
case 'w':
oflags |= O_CREAT | O_TRUNC;
break;
+ case 'x':
+ oflags |= O_EXCL;
+ break;
+
case '+':
rwflags = O_RDWR;
break;
-#ifdef O_TEXT
+#ifdef O_BINARY
+ case 'b':
+ oflags = (oflags & ~O_TEXT) | O_BINARY;
+ break;
+
case 't':
- oflags |= O_TEXT;
+ oflags = (oflags & ~O_BINARY) | O_TEXT;
break;
#endif
}
}
- int fd = utf8_open (filename, rwflags | oflags, 0666);
+ int fd = vlc_open (filename, rwflags | oflags, 0666);
if (fd == -1)
return NULL;
- if (append && (lseek (fd, 0, SEEK_END) == -1))
- {
- close (fd);
- return NULL;
- }
-
FILE *stream = fdopen (fd, mode);
if (stream == NULL)
close (fd);
return stream;
}
-/**
- * Creates a directory using UTF-8 paths.
- *
- * @param dirname a UTF-8 string with the name of the directory that you
- * want to create.
- * @param mode directory permissions
- * @return 0 on success, -1 on error (see errno).
- */
-int utf8_mkdir( const char *dirname, mode_t mode )
-{
-#if defined (UNDER_CE)
- (void) mode;
- /* mkdir converts internally to wchar */
- return _mkdir(dirname);
-#elif defined (WIN32)
- (void) mode;
- CONVERT_PATH (dirname, wpath, -1);
- return _wmkdir (wpath);
-
-#else
- char *locname = ToLocale( dirname );
- int res;
-
- if( locname == NULL )
- {
- errno = ENOENT;
- return -1;
- }
- res = mkdir( locname, mode );
-
- LocaleFree( locname );
- return res;
-#endif
-}
-
-/**
- * Opens a DIR pointer.
- *
- * @param dirname UTF-8 representation of the directory name
- * @return a pointer to the DIR struct, or NULL in case of error.
- * Release with standard closedir().
- */
-DIR *utf8_opendir( const char *dirname )
-{
-#ifdef WIN32
- CONVERT_PATH (dirname, wpath, NULL);
- return (DIR *)vlc_wopendir (wpath);
-
-#else
- const char *local_name = ToLocale( dirname );
-
- if( local_name != NULL )
- {
- DIR *dir = opendir( local_name );
- LocaleFree( local_name );
- return dir;
- }
-#endif
-
- errno = ENOENT;
- return NULL;
-}
-
-/**
- * Reads the next file name from an open directory.
- *
- * @param dir The directory that is being read
- *
- * @return a UTF-8 string of the directory entry.
- * Use free() to free this memory.
- */
-char *utf8_readdir( DIR *dir )
-{
-#ifdef WIN32
- struct _wdirent *ent = vlc_wreaddir (dir);
- if (ent == NULL)
- return NULL;
-
- return FromWide (ent->d_name);
-#else
- struct dirent *ent;
-
- ent = readdir( (DIR *)dir );
- if( ent == NULL )
- return NULL;
-
- return vlc_fix_readdir( ent->d_name );
-#endif
-}
static int dummy_select( const char *str )
{
}
/**
- * Does the same as utf8_scandir(), but takes an open directory pointer
+ * Does the same as vlc_scandir(), but takes an open directory pointer
* instead of a directory path.
*/
-int utf8_loaddir( DIR *dir, char ***namelist,
+int vlc_loaddir( DIR *dir, char ***namelist,
int (*select)( const char * ),
int (*compar)( const char **, const char ** ) )
{
- if( select == NULL )
+ assert (dir);
+
+ if (select == NULL)
select = dummy_select;
- if( dir == NULL )
- return -1;
- else
- {
- char **tab = NULL;
- char *entry;
- unsigned num = 0;
+ char **tab = NULL;
+ unsigned num = 0;
- rewinddir( dir );
+ rewinddir (dir);
- while( ( entry = utf8_readdir( dir ) ) != NULL )
+ for (unsigned size = 0;;)
+ {
+ errno = 0;
+ char *entry = vlc_readdir (dir);
+ if (entry == NULL)
{
- char **newtab;
+ if (errno)
+ goto error;
+ break;
+ }
- if( !select( entry ) )
- {
- free( entry );
- continue;
- }
+ if (!select (entry))
+ {
+ free (entry);
+ continue;
+ }
+
+ if (num >= size)
+ {
+ size = size ? (2 * size) : 16;
+ char **newtab = realloc (tab, sizeof (*tab) * (size));
- newtab = realloc( tab, sizeof( char * ) * (num + 1) );
- if( newtab == NULL )
+ if (unlikely(newtab == NULL))
{
- free( entry );
+ free (entry);
goto error;
}
tab = newtab;
- tab[num++] = entry;
}
- if( compar != NULL )
- qsort( tab, num, sizeof( tab[0] ),
- (int (*)( const void *, const void *))compar );
-
- *namelist = tab;
- return num;
+ tab[num++] = entry;
+ }
- error:{
- unsigned i;
+ if (compar != NULL)
+ qsort (tab, num, sizeof (*tab),
+ (int (*)( const void *, const void *))compar);
+ *namelist = tab;
+ return num;
- for( i = 0; i < num; i++ )
- free( tab[i] );
- if( tab != NULL )
- free( tab );
- }
- }
+error:
+ for (unsigned i = 0; i < num; i++)
+ free (tab[i]);
+ free (tab);
return -1;
}
* Selects file entries from a directory, as GNU C scandir().
*
* @param dirname UTF-8 diretory path
- * @param pointer [OUT] pointer set, on succesful completion, to the address
+ * @param pointer [OUT] pointer set, on successful completion, to the address
* of a table of UTF-8 filenames. All filenames must be freed with free().
* The table itself must be freed with free() as well.
*
* @return How many file names were selected (possibly 0),
* or -1 in case of error.
*/
-int utf8_scandir( const char *dirname, char ***namelist,
+int vlc_scandir( const char *dirname, char ***namelist,
int (*select)( const char * ),
int (*compar)( const char **, const char ** ) )
{
- DIR *dir = utf8_opendir (dirname);
+ DIR *dir = vlc_opendir (dirname);
int val = -1;
if (dir != NULL)
{
- val = utf8_loaddir (dir, namelist, select, compar);
+ val = vlc_loaddir (dir, namelist, select, compar);
closedir (dir);
}
return val;
}
-static int utf8_statEx( const char *filename, struct stat *buf,
- bool deref )
+int vlc_mkstemp( char *template )
{
-#ifdef UNDER_CE
- /*_stat translates to wchar internally on WinCE*/
- return _stat( filename, buf );
-#elif defined (WIN32)
- CONVERT_PATH (filename, wpath, -1);
- return _wstati64 (wpath, buf);
+ static const char digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+ static const int i_digits = sizeof(digits)/sizeof(*digits) - 1;
-#endif
-#ifdef HAVE_SYS_STAT_H
- const char *local_name = ToLocale( filename );
+ /* */
+ assert( template );
- if( local_name != NULL )
+ /* Check template validity */
+ const size_t i_length = strlen( template );
+ char *psz_rand = &template[i_length-6];
+
+ if( i_length < 6 || strcmp( psz_rand, "XXXXXX" ) )
{
- int res = deref ? stat( local_name, buf )
- : lstat( local_name, buf );
- LocaleFree( local_name );
- return res;
+ errno = EINVAL;
+ return -1;
}
- errno = ENOENT;
-#endif
- return -1;
-}
-
-/**
- * Finds file/inode informations, as stat().
- * Consider using fstat() instead, if possible.
- *
- * @param filename UTF-8 file path
- */
-int utf8_stat( const char *filename, struct stat *buf)
-{
- return utf8_statEx( filename, buf, true );
-}
-
-/**
- * Finds file/inode informations, as lstat().
- * Consider using fstat() instead, if possible.
- *
- * @param filename UTF-8 file path
- */
-int utf8_lstat( const char *filename, struct stat *buf)
-{
- return utf8_statEx( filename, buf, false );
-}
-
-/**
- * Removes a file.
- *
- * @param filename a UTF-8 string with the name of the file you want to delete.
- * @return A 0 return value indicates success. A -1 return value indicates an
- * error, and an error code is stored in errno
- */
-int utf8_unlink( const char *filename )
-{
-#ifdef UNDER_CE
- /*_open translates to wchar internally on WinCE*/
- return _unlink( filename );
-#elif defined (WIN32)
- CONVERT_PATH (filename, wpath, -1);
- return _wunlink (wpath);
-#endif
- const char *local_name = ToLocale( filename );
-
- if( local_name == NULL )
+ /* */
+ for( int i = 0; i < 256; i++ )
{
- errno = ENOENT;
- return -1;
+ /* Create a pseudo random file name */
+ uint8_t pi_rand[6];
+
+ vlc_rand_bytes( pi_rand, sizeof(pi_rand) );
+ for( int j = 0; j < 6; j++ )
+ psz_rand[j] = digits[pi_rand[j] % i_digits];
+
+ /* */
+ int fd = vlc_open( template, O_CREAT | O_EXCL | O_RDWR, 0600 );
+ if( fd >= 0 )
+ return fd;
+ if( errno != EEXIST )
+ return -1;
}
- int ret = unlink( local_name );
- LocaleFree( local_name );
- return ret;
+ errno = EEXIST;
+ return -1;
}
projects / vlc / blobdiff