/*****************************************************************************
- * 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 <vlc_fs.h>
-#include "libvlc.h" /* vlc_mkdir */
#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 HAVE_SYS_STAT_H
-# include <sys/stat.h>
-#endif
-#ifdef HAVE_FCNTL_H
-# include <fcntl.h>
-#endif
-#ifdef WIN32
-# include <io.h>
-# include <winsock2.h>
-# ifndef UNDER_CE
-# include <direct.h>
-# else
-# include <tchar.h>
-# endif
-#else
+#include <fcntl.h>
+#ifdef HAVE_UNISTD_H
# include <unistd.h>
-# include <sys/socket.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
- * @return a file handle on success, -1 on error (see errno).
- * @note Contrary to standard open(), this function returns file handles
- * with the close-on-exec flag enabled.
- */
-int vlc_open (const char *filename, int flags, ...)
-{
- unsigned int mode = 0;
- va_list ap;
-
- va_start (ap, flags);
- if (flags & O_CREAT)
- mode = va_arg (ap, unsigned int);
- va_end (ap);
-
-#ifdef O_CLOEXEC
- flags |= O_CLOEXEC;
-#endif
-
-#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);
-#ifdef HAVE_FCNTL
- if (fd != -1)
- fcntl (fd, F_SETFD, FD_CLOEXEC);
#endif
- LocaleFree (local_name);
- return fd;
-}
-
/**
* Opens a FILE pointer.
* @param filename file path, using UTF-8 encoding
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
}
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;
}
-/**
- * Opens a system file handle relative to an existing directory handle.
- *
- * @param dir directory file descriptor
- * @param filename file path to open (with UTF-8 encoding)
- * @param flags open() flags, see the C library open() documentation
- * @return a file handle on success, -1 on error (see errno).
- * @note Contrary to standard open(), this function returns file handles
- * with the close-on-exec flag enabled.
- */
-int vlc_openat (int dir, const char *filename, int flags, ...)
-{
- unsigned int mode = 0;
- va_list ap;
-
- va_start (ap, flags);
- if (flags & O_CREAT)
- mode = va_arg (ap, unsigned int);
- va_end (ap);
-
-#ifdef O_CLOEXEC
- flags |= O_CLOEXEC;
-#endif
-
- const char *local_name = ToLocale (filename);
- if (local_name == NULL)
- {
- errno = ENOENT;
- return -1;
- }
-
-#ifdef HAVE_FDOPENDIR
- int fd = openat (dir, local_name, flags, mode);
-# ifdef HAVE_FCNTL
- if (fd != -1)
- fcntl (fd, F_SETFD, FD_CLOEXEC);
-# endif
-#else
- int fd = -1;
- errno = ENOSYS;
-#endif
-
- LocaleFree (local_name);
- return fd;
-}
-
-
-/**
- * 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 vlc_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 *vlc_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 *vlc_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 )
{
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 = vlc_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] );
- 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 val;
}
-static int vlc_statEx( const char *filename, struct stat *buf,
- bool deref )
-{
-#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);
-
-#endif
-#ifdef HAVE_SYS_STAT_H
- const char *local_name = ToLocale( filename );
-
- if( local_name != NULL )
- {
- int res = deref ? stat( local_name, buf )
- : lstat( local_name, buf );
- LocaleFree( local_name );
- return res;
- }
- errno = ENOENT;
-#endif
- return -1;
-}
-
-/**
- * Finds file/inode informations, as stat().
- * Consider using fstat() instead, if possible.
- *
- * @param filename UTF-8 file path
- */
-int vlc_stat( const char *filename, struct stat *buf)
-{
- return vlc_statEx( filename, buf, true );
-}
-
-/**
- * Finds file/inode informations, as lstat().
- * Consider using fstat() instead, if possible.
- *
- * @param filename UTF-8 file path
- */
-int vlc_lstat( const char *filename, struct stat *buf)
-{
- return vlc_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 vlc_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 )
- {
- errno = ENOENT;
- return -1;
- }
-
- int ret = unlink( local_name );
- LocaleFree( local_name );
- return ret;
-}
-
-/**
- * Moves a file atomically. This only works within a single file system.
- *
- * @param oldpath path to the file before the move
- * @param newpath intended path to the file after the move
- * @return A 0 return value indicates success. A -1 return value indicates an
- * error, and an error code is stored in errno
- */
-int vlc_rename (const char *oldpath, const char *newpath)
-{
-#if defined (WIN32)
- CONVERT_PATH (oldpath, wold, -1);
- CONVERT_PATH (newpath, wnew, -1);
-# ifdef UNDER_CE
- /* FIXME: errno support */
- if (MoveFileW (wold, wnew))
- return 0;
- else
- return -1;
-#else
- return _wrename (wold, wnew);
-#endif
-
-#endif
- const char *lo = ToLocale (oldpath);
- if (lo == NULL)
- goto error;
-
- const char *ln = ToLocale (newpath);
- if (ln == NULL)
- {
- LocaleFree (lo);
-error:
- errno = ENOENT;
- return -1;
- }
-
- int ret = rename (lo, ln);
- LocaleFree (lo);
- LocaleFree (ln);
- return ret;
-}
-
int vlc_mkstemp( char *template )
{
static const char digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
errno = EEXIST;
return -1;
}
-
-#ifdef UNDER_CE
-# define dup(fd) (fd, -1)
-#endif
-
-/**
- * Duplicates a file descriptor. The new file descriptor has the close-on-exec
- * descriptor flag set.
- * @return a new file descriptor or -1
- */
-int vlc_dup (int oldfd)
-{
- int newfd;
-
-#ifdef HAVE_DUP3
- /* Unfortunately, dup3() works like dup2(), not like plain dup(). So we
- * need such contortion to find the new file descriptor while preserving
- * thread safety of the file descriptor table. */
- newfd = vlc_open ("/dev/null", O_RDONLY);
- if (likely(newfd != -1))
- {
- if (likely(dup3 (oldfd, newfd, O_CLOEXEC) == newfd))
- return newfd;
- close (newfd);
- }
-#endif
-
- newfd = dup (oldfd);
-#ifdef HAVE_FCNTL
- if (likely(newfd != -1))
- fcntl (newfd, F_SETFD, FD_CLOEXEC);
-#endif
- return newfd;
-}
-
-#include <vlc_network.h>
-
-/**
- * Creates a socket file descriptor. The new file descriptor has the
- * close-on-exec flag set.
- * @param pf protocol family
- * @param type socket type
- * @param proto network protocol
- * @param nonblock true to create a non-blocking socket
- * @return a new file descriptor or -1
- */
-int vlc_socket (int pf, int type, int proto, bool nonblock)
-{
- int fd;
-
-#ifdef SOCK_CLOEXEC
- type |= SOCK_CLOEXEC;
- if (nonblock)
- type |= SOCK_NONBLOCK;
- fd = socket (pf, type, proto);
- if (fd != -1 || errno != EINVAL)
- return fd;
-
- type &= ~(SOCK_CLOEXEC|SOCK_NONBLOCK);
-#endif
-
- fd = socket (pf, type, proto);
- if (fd == -1)
- return -1;
-
-#ifndef WIN32
- fcntl (fd, F_SETFD, FD_CLOEXEC);
- if (nonblock)
- fcntl (fd, F_SETFL, fcntl (fd, F_GETFL, 0) | O_NONBLOCK);
-#else
- if (nonblock)
- ioctlsocket (fd, FIONBIO, &(unsigned long){ 1 });
-#endif
- return fd;
-}
-
-/**
- * Accepts an inbound connection request on a listening socket.
- * The new file descriptor has the close-on-exec flag set.
- * @param lfd listening socket file descriptor
- * @param addr pointer to the peer address or NULL [OUT]
- * @param alen pointer to the length of the peer address or NULL [OUT]
- * @param nonblock whether to put the new socket in non-blocking mode
- * @return a new file descriptor, or -1 on error.
- */
-int vlc_accept (int lfd, struct sockaddr *addr, socklen_t *alen, bool nonblock)
-{
-#ifdef HAVE_ACCEPT4
- int flags = SOCK_CLOEXEC;
- if (nonblock)
- flags |= SOCK_NONBLOCK;
-
- do
- {
- int fd = accept4 (lfd, addr, alen, flags);
- if (fd != -1)
- return fd;
- }
- while (errno == EINTR);
-
- if (errno != ENOSYS)
- return -1;
-#endif
-#ifdef WIN32
- errno = 0;
-#endif
-
- do
- {
- int fd = accept (lfd, addr, alen);
- if (fd != -1)
- {
-#ifndef WIN32
- fcntl (fd, F_SETFD, FD_CLOEXEC);
- if (nonblock)
- fcntl (fd, F_SETFL, fcntl (fd, F_GETFL, 0) | O_NONBLOCK);
-#else
- if (nonblock)
- ioctlsocket (fd, FIONBIO, &(unsigned long){ 1 });
-#endif
- return fd;
- }
- }
- while (errno == EINTR);
-
- return -1;
-}
projects / vlc / blobdiff