1 /*****************************************************************************
2 * file.c: file input (file: access plug-in)
3 *****************************************************************************
4 * Copyright (C) 2001-2006 the VideoLAN team
5 * Copyright © 2006-2007 Rémi Denis-Courmont
8 * Authors: Christophe Massiot <massiot@via.ecp.fr>
9 * Rémi Denis-Courmont <rem # videolan # org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
30 #include <vlc_common.h>
32 #include <vlc_input.h>
33 #include <vlc_access.h>
34 #include <vlc_dialog.h>
38 #include <sys/types.h>
39 #ifdef HAVE_SYS_STAT_H
40 # include <sys/stat.h>
46 # include <sys/statvfs.h>
47 # if defined (HAVE_SYS_MOUNT_H)
48 # include <sys/param.h>
49 # include <sys/mount.h>
52 #ifdef HAVE_LINUX_MAGIC_H
54 # include <linux/magic.h>
61 # include <vlc_charset.h>
62 #elif defined( __OS2__ )
69 #if defined( WIN32 ) && !defined( UNDER_CE )
73 # define lseek _lseeki64
74 #elif defined( UNDER_CE )
75 # define PathIsNetworkPathW(wpath) (! wcsncmp(wpath, L"\\\\", 2))
83 unsigned int i_nb_reads;
91 static bool IsRemote (int fd)
93 #if defined (HAVE_FSTATVFS) && defined (MNT_LOCAL)
96 if (fstatvfs (fd, &stf))
98 /* fstatvfs() is in POSIX, but MNT_LOCAL is not */
99 return !(stf.f_flag & MNT_LOCAL);
101 #elif defined (HAVE_LINUX_MAGIC_H)
104 if (fstatfs (fd, &stf))
107 switch ((unsigned long)stf.f_type)
109 case AFS_SUPER_MAGIC:
110 case CODA_SUPER_MAGIC:
111 case NCP_SUPER_MAGIC:
112 case NFS_SUPER_MAGIC:
113 case SMB_SUPER_MAGIC:
114 case 0xFF534D42 /*CIFS_MAGIC_NUMBER*/:
126 #ifndef HAVE_POSIX_FADVISE
127 # define posix_fadvise(fd, off, len, adv)
130 /*****************************************************************************
131 * FileOpen: open the file
132 *****************************************************************************/
133 int FileOpen( vlc_object_t *p_this )
135 access_t *p_access = (access_t*)p_this;
137 bool is_remote = false;
143 if (!strcasecmp (p_access->psz_access, "fd"))
146 int oldfd = strtol (p_access->psz_location, &end, 10);
149 fd = vlc_dup (oldfd);
150 else if (*end == '/' && end > p_access->psz_location)
152 char *name = decode_URI_duplicate (end - 1);
156 fd = vlc_openat (oldfd, name, O_RDONLY | O_NONBLOCK);
163 const char *path = p_access->psz_filepath;
165 msg_Dbg (p_access, "opening file `%s'", path);
166 fd = vlc_open (path, O_RDONLY | O_NONBLOCK);
169 msg_Err (p_access, "cannot open file %s (%m)", path);
170 dialog_Fatal (p_access, _("File reading failed"),
171 _("VLC could not open the file \"%s\". (%m)"), path);
180 msg_Err (p_access, "failed to read (%m)");
183 /* Directories can be opened and read from, but only readdir() knows
184 * how to parse the data. The directory plugin will do it. */
185 if (S_ISDIR (st.st_mode))
187 #ifdef HAVE_FDOPENDIR
188 DIR *handle = fdopendir (fd);
190 goto error; /* Uh? */
191 return DirInit (p_access, handle);
193 msg_Dbg (p_access, "ignoring directory");
198 access_sys_t *p_sys = malloc (sizeof (*p_sys));
199 if (unlikely(p_sys == NULL))
201 access_InitFields (p_access);
202 p_access->pf_read = FileRead;
203 p_access->pf_block = NULL;
204 p_access->pf_control = FileControl;
205 p_access->pf_seek = FileSeek;
206 p_access->p_sys = p_sys;
207 p_sys->i_nb_reads = 0;
209 p_sys->b_pace_control = true;
211 if (S_ISREG (st.st_mode))
212 p_access->info.i_size = st.st_size;
213 else if (!S_ISBLK (st.st_mode))
215 p_access->pf_seek = NoSeek;
216 p_sys->b_pace_control = strcasecmp (p_access->psz_access, "stream");
219 if (p_access->pf_seek != NoSeek)
221 /* Demuxers will need the beginning of the file for probing. */
222 posix_fadvise (fd, 0, 4096, POSIX_FADV_WILLNEED);
223 /* In most cases, we only read the file once. */
224 posix_fadvise (fd, 0, 0, POSIX_FADV_NOREUSE);
225 #if defined(HAVE_FCNTL)
226 /* We'd rather use any available memory for reading ahead
227 * than for caching what we've already seen/heard */
228 # if defined(F_RDAHEAD)
229 fcntl (fd, F_RDAHEAD, 1);
231 # if defined(F_NOCACHE)
232 fcntl (fd, F_NOCACHE, 1);
243 /*****************************************************************************
244 * FileClose: close the target
245 *****************************************************************************/
246 void FileClose (vlc_object_t * p_this)
248 access_t *p_access = (access_t*)p_this;
250 if (p_access->pf_read == NULL)
256 access_sys_t *p_sys = p_access->p_sys;
263 #include <vlc_network.h>
265 /*****************************************************************************
266 * Read: standard read on a file descriptor.
267 *****************************************************************************/
268 ssize_t FileRead( access_t *p_access, uint8_t *p_buffer, size_t i_len )
270 access_sys_t *p_sys = p_access->p_sys;
274 #if !defined (WIN32) && !defined (__OS2__)
275 if (p_access->pf_seek == NoSeek)
276 i_ret = net_Read (p_access, fd, NULL, p_buffer, i_len, false);
279 i_ret = read (fd, p_buffer, i_len);
290 msg_Err (p_access, "failed to read (%m)");
291 dialog_Fatal (p_access, _("File reading failed"), "%s (%m)",
292 _("VLC could not read the file."));
293 p_access->info.b_eof = true;
298 p_access->info.i_pos += i_ret;
300 p_access->info.b_eof = true;
304 if ((p_access->info.i_size && !(p_sys->i_nb_reads % INPUT_FSTAT_NB_READS))
305 || (p_access->info.i_pos > p_access->info.i_size))
307 #ifdef HAVE_SYS_STAT_H
310 if ((fstat (fd, &st) == 0)
311 && (p_access->info.i_size != (uint64_t)st.st_size))
313 p_access->info.i_size = st.st_size;
314 p_access->info.i_update |= INPUT_UPDATE_SIZE;
322 /*****************************************************************************
323 * Seek: seek to a specific location in a file
324 *****************************************************************************/
325 int FileSeek (access_t *p_access, uint64_t i_pos)
327 p_access->info.i_pos = i_pos;
328 p_access->info.b_eof = false;
330 lseek (p_access->p_sys->fd, i_pos, SEEK_SET);
334 int NoSeek (access_t *p_access, uint64_t i_pos)
337 (void) p_access; (void) i_pos;
341 /*****************************************************************************
343 *****************************************************************************/
344 int FileControl( access_t *p_access, int i_query, va_list args )
346 access_sys_t *p_sys = p_access->p_sys;
353 case ACCESS_CAN_SEEK:
354 case ACCESS_CAN_FASTSEEK:
355 pb_bool = (bool*)va_arg( args, bool* );
356 *pb_bool = (p_access->pf_seek != NoSeek);
359 case ACCESS_CAN_PAUSE:
360 case ACCESS_CAN_CONTROL_PACE:
361 pb_bool = (bool*)va_arg( args, bool* );
362 *pb_bool = p_sys->b_pace_control;
366 case ACCESS_GET_PTS_DELAY:
367 pi_64 = (int64_t*)va_arg( args, int64_t * );
368 if (IsRemote (p_sys->fd))
369 *pi_64 = var_InheritInteger (p_access, "network-caching");
371 *pi_64 = var_InheritInteger (p_access, "file-caching");
376 case ACCESS_SET_PAUSE_STATE:
380 case ACCESS_GET_TITLE_INFO:
381 case ACCESS_SET_TITLE:
382 case ACCESS_SET_SEEKPOINT:
383 case ACCESS_SET_PRIVATE_ID_STATE:
384 case ACCESS_GET_META:
385 case ACCESS_GET_PRIVATE_ID_STATE:
386 case ACCESS_GET_CONTENT_TYPE:
390 msg_Warn( p_access, "unimplemented query %d in control", i_query );