git.sesse.net Git - vlc/blob - modules/access/directory.c

   1 /*****************************************************************************
   2  * directory.c: expands a directory (directory: access plug-in)
   3  *****************************************************************************
   4  * Copyright (C) 2002-2008 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Derk-Jan Hartman <hartman at videolan dot org>
   8  *          Rémi Denis-Courmont
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_access.h>
  36
  37 #ifdef HAVE_SYS_TYPES_H
  38 #   include <sys/types.h>
  39 #endif
  40 #ifdef HAVE_SYS_STAT_H
  41 #   include <sys/stat.h>
  42 #endif
  43
  44 #ifdef HAVE_UNISTD_H
  45 #   include <unistd.h>
  46 #elif defined( WIN32 ) && !defined( UNDER_CE )
  47 #   include <io.h>
  48 #endif
  49
  50 #ifdef HAVE_DIRENT_H
  51 #   include <dirent.h>
  52 #endif
  53 #ifdef __sun__
  54 static inline int dirfd (DIR *dir)
  55 {
  56     return dir->dd_fd;
  57 }
  58 #endif
  59
  60 #include <vlc_charset.h>
  61 #include <vlc_url.h>
  62 #include <vlc_strings.h>
  63
  64 /*****************************************************************************
  65  * Module descriptor
  66  *****************************************************************************/
  67 static int  Open ( vlc_object_t * );
  68 static void Close( vlc_object_t * );
  69
  70 #define RECURSIVE_TEXT N_("Subdirectory behavior")
  71 #define RECURSIVE_LONGTEXT N_( \
  72         "Select whether subdirectories must be expanded.\n" \
  73         "none: subdirectories do not appear in the playlist.\n" \
  74         "collapse: subdirectories appear but are expanded on first play.\n" \
  75         "expand: all subdirectories are expanded.\n" )
  76
  77 static const char *const psz_recursive_list[] = { "none", "collapse", "expand" };
  78 static const char *const psz_recursive_list_text[] = {
  79     N_("none"), N_("collapse"), N_("expand") };
  80
  81 #define IGNORE_TEXT N_("Ignored extensions")
  82 #define IGNORE_LONGTEXT N_( \
  83         "Files with these extensions will not be added to playlist when " \
  84         "opening a directory.\n" \
  85         "This is useful if you add directories that contain playlist files " \
  86         "for instance. Use a comma-separated list of extensions." )
  87
  88 vlc_module_begin ()
  89     set_category( CAT_INPUT )
  90     set_shortname( N_("Directory" ) )
  91     set_subcategory( SUBCAT_INPUT_ACCESS )
  92     set_description( N_("Standard filesystem directory input") )
  93     set_capability( "access", 55 )
  94     add_shortcut( "directory" )
  95     add_shortcut( "dir" )
  96     add_shortcut( "file" )
  97     add_string( "recursive", "expand" , NULL, RECURSIVE_TEXT,
  98                 RECURSIVE_LONGTEXT, false )
  99       change_string_list( psz_recursive_list, psz_recursive_list_text, 0 )
 100     add_string( "ignore-filetypes", "m3u,db,nfo,ini,jpg,jpeg,ljpg,gif,png,pgm,pgmyuv,pbm,pam,tga,bmp,pnm,xpm,xcf,pcx,tif,tiff,lbm,sfv,txt,sub,idx,srt,cue,ssa",
 101                 NULL, IGNORE_TEXT, IGNORE_LONGTEXT, false )
 102     set_callbacks( Open, Close )
 103 vlc_module_end ()
 104
 105
 106 /*****************************************************************************
 107  * Local prototypes, constants, structures
 108  *****************************************************************************/
 109
 110 enum
 111 {
 112     MODE_EXPAND,
 113     MODE_COLLAPSE,
 114     MODE_NONE
 115 };
 116
 117 typedef struct directory_t directory_t;
 118 struct directory_t
 119 {
 120     directory_t *parent;
 121     DIR         *handle;
 122     char        *uri;
 123 #ifndef WIN32
 124     struct stat  st;
 125 #endif
 126     char         path[1];
 127 };
 128
 129 struct access_sys_t
 130 {
 131     directory_t *current;
 132     DIR *handle;
 133     char *ignored_exts;
 134     int mode;
 135     int i_item_count;
 136     char *psz_xspf_extension;
 137 };
 138
 139 static block_t *Block( access_t * );
 140 static int Control( access_t *, int, va_list );
 141
 142 /*****************************************************************************
 143  * Open: open the directory
 144  *****************************************************************************/
 145 static int Open( vlc_object_t *p_this )
 146 {
 147     access_t *p_access = (access_t*)p_this;
 148     access_sys_t *p_sys;
 149
 150     if( !p_access->psz_path )
 151         return VLC_EGENERIC;
 152
 153     DIR *handle;
 154     if (strcmp (p_access->psz_path, "-"))
 155         handle = utf8_opendir (p_access->psz_path);
 156     else
 157     {
 158 #if 0   /* This won't work yet, it generates paths like "-/music.ogg".
 159          * We'd need to use openat() here and in the file access... */
 160         int fd = dup (0);
 161         handle = fdopendir (fd);
 162         if (handle == NULL)
 163             close (fd);
 164 #else
 165         return VLC_EGENERIC;
 166 #endif
 167     }
 168
 169     if (handle == NULL)
 170         return VLC_EGENERIC;
 171
 172     p_sys = malloc (sizeof (*p_sys));
 173     if (!p_sys)
 174     {
 175         closedir( handle );
 176         return VLC_ENOMEM;
 177     }
 178
 179     p_access->p_sys = p_sys;
 180     p_sys->current = NULL;
 181     p_sys->handle = handle;
 182     p_sys->ignored_exts = var_CreateGetString (p_access, "ignore-filetypes");
 183     p_sys->i_item_count = 0;
 184     p_sys->psz_xspf_extension = strdup( "" );
 185
 186     /* Handle mode */
 187     char *psz = var_CreateGetString( p_access, "recursive" );
 188     if( *psz == '\0' || !strcasecmp( psz, "none" )  )
 189         p_sys->mode = MODE_NONE;
 190     else if( !strcasecmp( psz, "collapse" )  )
 191         p_sys->mode = MODE_COLLAPSE;
 192     else
 193         p_sys->mode = MODE_EXPAND;
 194     free( psz );
 195
 196     p_access->pf_read  = NULL;
 197     p_access->pf_block = Block;
 198     p_access->pf_seek  = NULL;
 199     p_access->pf_control= Control;
 200     free (p_access->psz_demux);
 201     p_access->psz_demux = strdup ("xspf-open");
 202
 203     return VLC_SUCCESS;
 204 }
 205
 206 /*****************************************************************************
 207  * Close: close the target
 208  *****************************************************************************/
 209 static void Close( vlc_object_t * p_this )
 210 {
 211     access_t *p_access = (access_t*)p_this;
 212     access_sys_t *p_sys = p_access->p_sys;
 213
 214     while (p_sys->current)
 215     {
 216         directory_t *current = p_sys->current;
 217
 218         p_sys->current = current->parent;
 219         closedir (current->handle);
 220         free (current->uri);
 221         free (current);
 222     }
 223     if (p_sys->handle != NULL)
 224         closedir (p_sys->handle); /* corner case,:Block() not called ever */
 225     free (p_sys->psz_xspf_extension);
 226     free (p_sys->ignored_exts);
 227     free (p_sys);
 228 }
 229
 230 /* Detect directories that recurse into themselves. */
 231 static bool has_inode_loop (const directory_t *dir)
 232 {
 233 #ifndef WIN32
 234     dev_t dev = dir->st.st_dev;
 235     ino_t inode = dir->st.st_ino;
 236
 237     while ((dir = dir->parent) != NULL)
 238         if ((dir->st.st_dev == dev) && (dir->st.st_ino == inode))
 239             return true;
 240 #else
 241 # define fstat( fd, st ) (0)
 242     VLC_UNUSED( dir );
 243 #endif
 244     return false;
 245 }
 246
 247 static block_t *Block (access_t *p_access)
 248 {
 249     access_sys_t *p_sys = p_access->p_sys;
 250     directory_t *current = p_sys->current;
 251
 252     if (p_access->info.b_eof)
 253         return NULL;
 254
 255     if (current == NULL)
 256     {   /* Startup: send the XSPF header */
 257         static const char header[] =
 258             "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 259             "<playlist version=\"1\" xmlns=\"http://xspf.org/ns/0/\" xmlns:vlc=\"http://www.videolan.org/vlc/playlist/ns/0/\">\n"
 260             " <trackList>\n";
 261         block_t *block = block_Alloc (sizeof (header) - 1);
 262         if (!block)
 263             goto fatal;
 264         memcpy (block->p_buffer, header, sizeof (header) - 1);
 265
 266         /* "Open" the base directory */
 267         current = malloc (sizeof (*current) + strlen (p_access->psz_path));
 268         if (current == NULL)
 269         {
 270             block_Release (block);
 271             goto fatal;
 272         }
 273         current->parent = NULL;
 274         current->handle = p_sys->handle;
 275         strcpy (current->path, p_access->psz_path);
 276         current->uri = make_URI (current->path);
 277         if ((current->uri == NULL)
 278          || fstat (dirfd (current->handle), &current->st))
 279         {
 280             free (current->uri);
 281             free (current);
 282             block_Release (block);
 283             goto fatal;
 284         }
 285
 286         p_sys->handle = NULL;
 287         p_sys->current = current;
 288         return block;
 289     }
 290
 291     char *entry = utf8_readdir (current->handle);
 292     if (entry == NULL)
 293     {   /* End of directory, go back to parent */
 294         closedir (current->handle);
 295         p_sys->current = current->parent;
 296         free (current->uri);
 297         free (current);
 298
 299         if (p_sys->current == NULL)
 300         {   /* End of XSPF playlist */
 301             char *footer;
 302             int len = asprintf( &footer, " </trackList>\n" \
 303                 " <extension application=\"http://www.videolan.org/vlc/playlist/0\">\n" \
 304                 "%s" \
 305                 " </extension>\n" \
 306                 "</playlist>\n", p_sys->psz_xspf_extension );
 307             if( len < 0 )
 308                 goto fatal;
 309
 310             block_t *block = block_Alloc ( len );
 311             if (!block)
 312                 goto fatal;
 313             memcpy (block->p_buffer, footer, len);
 314             free( footer );
 315             p_access->info.b_eof = true;
 316             return block;
 317         }
 318         else
 319         {
 320             /* This was the end of a "subnode" */
 321             /* Write the ID to the extension */
 322             char *old_xspf_extension = p_sys->psz_xspf_extension;
 323             if (old_xspf_extension == NULL)
 324                 goto fatal;
 325
 326             int len2 = asprintf( &p_sys->psz_xspf_extension, "%s  </vlc:node>\n", old_xspf_extension );
 327             if (len2 == -1)
 328                 goto fatal;
 329             free( old_xspf_extension );
 330         }
 331         return NULL;
 332     }
 333
 334     /* Skip current, parent and hidden directories */
 335     if (entry[0] == '.')
 336     {
 337         free (entry);
 338         return NULL;
 339     }
 340     /* Handle recursion */
 341     if (p_sys->mode != MODE_COLLAPSE)
 342     {
 343         directory_t *sub = malloc (sizeof (*sub) + strlen (current->path) + 1
 344                                                  + strlen (entry));
 345         if (sub == NULL)
 346         {
 347             free (entry);
 348             return NULL;
 349         }
 350         sprintf (sub->path, "%s/%s", current->path, entry);
 351
 352         DIR *handle = utf8_opendir (sub->path);
 353         if (handle != NULL)
 354         {
 355             sub->parent = current;
 356             sub->handle = handle;
 357
 358             char *encoded = encode_URI_component (entry);
 359             if ((encoded == NULL)
 360              || (asprintf (&sub->uri, "%s/%s", current->uri, encoded) == -1))
 361                  sub->uri = NULL;
 362             free (encoded);
 363
 364             if ((p_sys->mode == MODE_NONE)
 365              || fstat (dirfd (handle), &sub->st)
 366              || has_inode_loop (sub)
 367              || (sub->uri == NULL))
 368             {
 369                 free (entry);
 370                 closedir (handle);
 371                 free (sub->uri);
 372                 free (sub);
 373                 return NULL;
 374             }
 375             p_sys->current = sub;
 376
 377             /* Add node to xspf extension */
 378             char *old_xspf_extension = p_sys->psz_xspf_extension;
 379             if (old_xspf_extension == NULL)
 380             {
 381                 free (entry);
 382                 goto fatal;
 383             }
 384
 385             char *title = convert_xml_special_chars (entry);
 386             free (entry);
 387             if (title == NULL
 388              || asprintf (&p_sys->psz_xspf_extension, "%s"
 389                           "  <vlc:node title=\"%s\">\n", old_xspf_extension,
 390                           title) == -1)
 391             {
 392                 free (title);
 393                 goto fatal;
 394             }
 395             free (title);
 396             free (old_xspf_extension);
 397             return NULL;
 398         }
 399         else
 400             free (sub);
 401     }
 402
 403     /* Skip files with ignored extensions */
 404     if (p_sys->ignored_exts != NULL)
 405     {
 406         const char *ext = strrchr (entry, '.');
 407         if (ext != NULL)
 408         {
 409             size_t extlen = strlen (++ext);
 410             for (const char *type = p_sys->ignored_exts, *end;
 411                  type[0]; type = end + 1)
 412             {
 413                 end = strchr (type, ',');
 414                 if (end == NULL)
 415                     end = type + strlen (type);
 416
 417                 if (type + extlen == end
 418                  && !strncasecmp (ext, type, extlen))
 419                 {
 420                     free (entry);
 421                     return NULL;
 422                 }
 423
 424                 if (*end == '\0')
 425                     break;
 426             }
 427         }
 428     }
 429
 430     char *encoded = encode_URI_component (entry);
 431     free (entry);
 432     if (encoded == NULL)
 433         goto fatal;
 434     int len = asprintf (&entry,
 435                         "  <track><location>%s/%s</location>\n" \
 436                         "   <extension application=\"http://www.videolan.org/vlc/playlist/0\">\n" \
 437                         "    <vlc:id>%d</vlc:id>\n" \
 438                         "   </extension>\n" \
 439                         "  </track>\n",
 440                         current->uri, encoded, p_sys->i_item_count++);
 441     free (encoded);
 442     if (len == -1)
 443         goto fatal;
 444
 445     /* Write the ID to the extension */
 446     char *old_xspf_extension = p_sys->psz_xspf_extension;
 447     if (old_xspf_extension == NULL)
 448         goto fatal;
 449
 450     int len2 = asprintf( &p_sys->psz_xspf_extension, "%s   <vlc:item tid=\"%i\" />\n",
 451                             old_xspf_extension, p_sys->i_item_count-1 );
 452     if (len2 == -1)
 453         goto fatal;
 454     free( old_xspf_extension );
 455
 456     /* TODO: new block allocator for malloc()ated data */
 457     block_t *block = block_Alloc (len);
 458     if (!block)
 459     {
 460         free (entry);
 461         goto fatal;
 462     }
 463     memcpy (block->p_buffer, entry, len);
 464     free (entry);
 465     return block;
 466
 467 fatal:
 468     p_access->info.b_eof = true;
 469     return NULL;
 470 }
 471
 472 /*****************************************************************************
 473  * Control:
 474  *****************************************************************************/
 475 static int Control( access_t *p_access, int i_query, va_list args )
 476 {
 477     switch( i_query )
 478     {
 479         /* */
 480         case ACCESS_CAN_SEEK:
 481         case ACCESS_CAN_FASTSEEK:
 482             *va_arg( args, bool* ) = false;
 483             break;
 484
 485         case ACCESS_CAN_PAUSE:
 486         case ACCESS_CAN_CONTROL_PACE:
 487             *va_arg( args, bool* ) = true;
 488             break;
 489
 490         /* */
 491         case ACCESS_GET_PTS_DELAY:
 492             *va_arg( args, int64_t * ) = DEFAULT_PTS_DELAY * 1000;
 493             break;
 494
 495         /* */
 496         case ACCESS_SET_PAUSE_STATE:
 497         case ACCESS_GET_TITLE_INFO:
 498         case ACCESS_SET_TITLE:
 499         case ACCESS_SET_SEEKPOINT:
 500         case ACCESS_SET_PRIVATE_ID_STATE:
 501         case ACCESS_GET_CONTENT_TYPE:
 502         case ACCESS_GET_META:
 503             return VLC_EGENERIC;
 504
 505         default:
 506             msg_Warn( p_access, "unimplemented query in control" );
 507             return VLC_EGENERIC;
 508     }
 509     return VLC_SUCCESS;
 510 }