modules/misc/lua/vlc.c

   1 /*****************************************************************************
   2  * vlc.c: Generic lua interface functions
   3  *****************************************************************************
   4  * Copyright (C) 2007-2008 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea at videolan tod org>
   8  *          Pierre d'Herbemont <pdherbemont # videolan.org>
   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 #ifndef  _GNU_SOURCE
  29 #   define  _GNU_SOURCE
  30 #endif
  31
  32 #ifdef HAVE_CONFIG_H
  33 # include "config.h"
  34 #endif
  35
  36 #include <assert.h>
  37
  38 #include <vlc_common.h>
  39 #include <vlc_plugin.h>
  40 #include <vlc_meta.h>
  41 #include <vlc_charset.h>
  42 #include <vlc_fs.h>
  43 #include <vlc_aout.h>
  44 #include <vlc_services_discovery.h>
  45 #include <sys/stat.h>
  46
  47 #include <lua.h>        /* Low level lua C API */
  48 #include <lauxlib.h>    /* Higher level C API */
  49 #include <lualib.h>     /* Lua libs */
  50
  51 #include "vlc.h"
  52
  53 /*****************************************************************************
  54  * Module descriptor
  55  *****************************************************************************/
  56 #define INTF_TEXT N_("Lua interface")
  57 #define INTF_LONGTEXT N_("Lua interface module to load")
  58
  59 #define CONFIG_TEXT N_("Lua interface configuration")
  60 #define CONFIG_LONGTEXT N_("Lua interface configuration string. Format is: '[\"<interface module name>\"] = { <option> = <value>, ...}, ...'.")
  61 #define HOST_TEXT N_( "Host address" )
  62 #define HOST_LONGTEXT N_( \
  63     "Address and port the HTTP interface will listen on. It defaults to " \
  64     "all network interfaces (0.0.0.0)." \
  65     " If you want the HTTP interface to be available only on the local " \
  66     "machine, enter 127.0.0.1" )
  67 #define SRC_TEXT N_( "Source directory" )
  68 #define SRC_LONGTEXT N_( "Source directory" )
  69 #define INDEX_TEXT N_( "Directory index" )
  70 #define INDEX_LONGTEXT N_( "Allow to build directory index" )
  71
  72 #define TELNETHOST_TEXT N_( "Host" )
  73 #define TELNETHOST_LONGTEXT N_( "This is the host on which the " \
  74     "interface will listen. It defaults to all network interfaces (0.0.0.0)." \
  75     " If you want this interface to be available only on the local " \
  76     "machine, enter \"127.0.0.1\"." )
  77 #define TELNETPORT_TEXT N_( "Port" )
  78 #define TELNETPORT_LONGTEXT N_( "This is the TCP port on which this " \
  79     "interface will listen. It defaults to 4212." )
  80 #define TELNETPORT_DEFAULT 4212
  81 #define TELNETPWD_TEXT N_( "Password" )
  82 #define TELNETPWD_LONGTEXT N_( "A single administration password is used " \
  83     "to protect this interface. The default value is \"admin\"." )
  84 #define TELNETPWD_DEFAULT "admin"
  85 #define RCHOST_TEXT N_("TCP command input")
  86 #define RCHOST_LONGTEXT N_("Accept commands over a socket rather than stdin. " \
  87             "You can set the address and port the interface will bind to." )
  88
  89 static int vlc_sd_probe_Open( vlc_object_t * );
  90
  91 vlc_module_begin ()
  92         set_shortname( N_("Lua Interface Module") )
  93         set_description( N_("Interfaces implemented using lua scripts") )
  94         add_shortcut( "luaintf" )
  95         add_shortcut( "luahttp" )
  96         /* add_shortcut( "http" ) */
  97         add_shortcut( "luatelnet" )
  98         add_shortcut( "telnet" )
  99         add_shortcut( "luahotkeys" )
 100         /* add_shortcut( "hotkeys" ) */
 101         set_capability( "interface", 0 )
 102         set_category( CAT_INTERFACE )
 103         set_subcategory( SUBCAT_INTERFACE_CONTROL )
 104         add_string( "lua-intf", "dummy",
 105                     INTF_TEXT, INTF_LONGTEXT, false )
 106         add_string( "lua-config", "",
 107                     CONFIG_TEXT, CONFIG_LONGTEXT, false )
 108         set_section( N_("Lua HTTP"), 0 )
 109             add_string ( "http-host", NULL, HOST_TEXT, HOST_LONGTEXT, true )
 110             add_string ( "http-src",  NULL, SRC_TEXT,  SRC_LONGTEXT,  true )
 111             add_bool   ( "http-index", false, NULL, INDEX_TEXT, INDEX_LONGTEXT, true )
 112         set_section( N_("Lua RC"), 0 )
 113             add_string( "rc-host", NULL, RCHOST_TEXT, RCHOST_LONGTEXT, true )
 114         set_section( N_("Lua Telnet"), 0 )
 115             add_string( "telnet-host", "localhost", TELNETHOST_TEXT,
 116                         TELNETHOST_LONGTEXT, true )
 117             add_integer( "telnet-port", TELNETPORT_DEFAULT, TELNETPORT_TEXT,
 118                          TELNETPORT_LONGTEXT, true )
 119             add_password( "telnet-password", TELNETPWD_DEFAULT, TELNETPWD_TEXT,
 120                           TELNETPWD_LONGTEXT, true )
 121
 122         set_callbacks( Open_LuaIntf, Close_LuaIntf )
 123
 124     add_submodule ()
 125         set_shortname( N_( "Lua Meta Fetcher" ) )
 126         set_description( N_("Fetch meta data using lua scripts") )
 127         set_capability( "meta fetcher", 10 )
 128         set_callbacks( FetchMeta, NULL )
 129
 130     add_submodule ()
 131         set_shortname( N_( "Lua Meta Reader" ) )
 132         set_description( N_("Read meta data using lua scripts") )
 133         set_capability( "meta reader", 10 )
 134         set_callbacks( ReadMeta, NULL )
 135
 136     add_submodule ()
 137         add_shortcut( "luaplaylist" )
 138         set_shortname( N_("Lua Playlist") )
 139         set_description( N_("Lua Playlist Parser Interface") )
 140         set_capability( "demux", 2 )
 141         set_callbacks( Import_LuaPlaylist, Close_LuaPlaylist )
 142
 143     add_submodule ()
 144         set_description( N_("Lua Interface Module (shortcuts)") )
 145         add_shortcut( "luarc" )
 146         add_shortcut( "rc" )
 147         set_capability( "interface", 25 )
 148         set_callbacks( Open_LuaIntf, Close_LuaIntf )
 149
 150     add_submodule ()
 151         set_shortname( N_( "Lua Art" ) )
 152         set_description( N_("Fetch artwork using lua scripts") )
 153         set_capability( "art finder", 10 )
 154         set_callbacks( FindArt, NULL )
 155
 156     add_submodule ()
 157         set_shortname( N_("Lua Extension") )
 158         add_shortcut( "luaextension" )
 159         set_capability( "extension", 1 )
 160         set_callbacks( Open_Extension, Close_Extension )
 161
 162     add_submodule ()
 163         set_description( N_("Lua SD Module") )
 164         add_shortcut( "luasd" )
 165         set_capability( "services_discovery", 0 )
 166         add_string( "lua-sd", "", NULL, NULL, false )
 167             change_volatile()
 168         add_string( "lua-longname", "", NULL, NULL, false )
 169             change_volatile()
 170         set_callbacks( Open_LuaSD, Close_LuaSD )
 171
 172     add_submodule ()
 173         set_description( N_("Freebox TV") )
 174         add_shortcut( "freebox" )
 175         set_capability( "services_discovery", 0 )
 176         set_callbacks( Open_LuaSD, Close_LuaSD )
 177
 178     add_submodule ()
 179         set_description( N_("French TV") )
 180         add_shortcut( "frenchtv" )
 181         set_capability( "services_discovery", 0 )
 182         set_callbacks( Open_LuaSD, Close_LuaSD )
 183
 184     VLC_SD_PROBE_SUBMODULE
 185
 186 vlc_module_end ()
 187
 188 /*****************************************************************************
 189  *
 190  *****************************************************************************/
 191 static const char *ppsz_lua_exts[] = { ".luac", ".lua", NULL };
 192 static int file_select( const char *file )
 193 {
 194     int i = strlen( file );
 195     int j;
 196     for( j = 0; ppsz_lua_exts[j]; j++ )
 197     {
 198         int l = strlen( ppsz_lua_exts[j] );
 199         if( i >= l && !strcmp( file+i-l, ppsz_lua_exts[j] ) )
 200             return 1;
 201     }
 202     return 0;
 203 }
 204
 205 static int file_compare( const char **a, const char **b )
 206 {
 207     return strcmp( *a, *b );
 208 }
 209
 210 int vlclua_dir_list( vlc_object_t *p_this, const char *luadirname,
 211                      char ***pppsz_dir_list )
 212 {
 213 #define MAX_DIR_LIST_SIZE 5
 214     *pppsz_dir_list = malloc(MAX_DIR_LIST_SIZE*sizeof(char *));
 215     if (!*pppsz_dir_list)
 216         return VLC_EGENERIC;
 217     char **ppsz_dir_list = *pppsz_dir_list;
 218
 219     int i = 0;
 220     char *datadir = config_GetUserDir( VLC_DATA_DIR );
 221
 222     if( likely(datadir != NULL)
 223      && likely(asprintf( &ppsz_dir_list[i], "%s"DIR_SEP"lua"DIR_SEP"%s",
 224                          datadir, luadirname ) != -1) )
 225         i++;
 226     free( datadir );
 227
 228 #if !(defined(__APPLE__) || defined(SYS_BEOS) || defined(WIN32))
 229     if( likely(asprintf( &ppsz_dir_list[i], "%s"DIR_SEP"lua"DIR_SEP"%s",
 230                          config_GetLibDir(), luadirname ) != -1) )
 231             i++;
 232 #endif
 233
 234     char *psz_datapath = config_GetDataDir( p_this );
 235     if( likely(psz_datapath != NULL) )
 236     {
 237         if( likely(asprintf( &ppsz_dir_list[i], "%s"DIR_SEP"lua"DIR_SEP"%s",
 238                               psz_datapath, luadirname ) != -1) )
 239             i++;
 240
 241 #if defined(__APPLE__) || defined(SYS_BEOS)
 242         if( likely(asprintf( &ppsz_dir_list[i],
 243                              "%s"DIR_SEP"share"DIR_SEP"lua"DIR_SEP"%s",
 244                              psz_datapath, luadirname ) != -1) )
 245             i++;
 246 #endif
 247         free( psz_datapath );
 248     }
 249
 250     ppsz_dir_list[i] = NULL;
 251
 252     assert( i < MAX_DIR_LIST_SIZE);
 253
 254     return VLC_SUCCESS;
 255 }
 256
 257 void vlclua_dir_list_free( char **ppsz_dir_list )
 258 {
 259     char **ppsz_dir;
 260     for( ppsz_dir = ppsz_dir_list; *ppsz_dir; ppsz_dir++ )
 261         free( *ppsz_dir );
 262     free( ppsz_dir_list );
 263 }
 264
 265 /*****************************************************************************
 266  * Will execute func on all scripts in luadirname, and stop if func returns
 267  * success.
 268  *****************************************************************************/
 269 int vlclua_scripts_batch_execute( vlc_object_t *p_this,
 270                                   const char * luadirname,
 271                                   int (*func)(vlc_object_t *, const char *, void *),
 272                                   void * user_data)
 273 {
 274     char **ppsz_dir_list = NULL;
 275
 276     int i_ret = vlclua_dir_list( p_this, luadirname, &ppsz_dir_list );
 277     if( i_ret != VLC_SUCCESS )
 278         return i_ret;
 279     i_ret = VLC_EGENERIC;
 280
 281     for( char **ppsz_dir = ppsz_dir_list; *ppsz_dir; ppsz_dir++ )
 282     {
 283         char **ppsz_filelist;
 284         int i_files;
 285
 286         msg_Dbg( p_this, "Trying Lua scripts in %s", *ppsz_dir );
 287         i_files = vlc_scandir( *ppsz_dir, &ppsz_filelist, file_select,
 288                                 file_compare );
 289         if( i_files < 0 )
 290             continue;
 291
 292         char **ppsz_file = ppsz_filelist;
 293         char **ppsz_fileend = ppsz_filelist + i_files;
 294
 295         while( ppsz_file < ppsz_fileend )
 296         {
 297             char *psz_filename;
 298
 299             if( asprintf( &psz_filename,
 300                           "%s" DIR_SEP "%s", *ppsz_dir, *ppsz_file ) == -1 )
 301                 psz_filename = NULL;
 302             free( *(ppsz_file++) );
 303
 304             if( likely(psz_filename != NULL) )
 305             {
 306                 msg_Dbg( p_this, "Trying Lua playlist script %s",
 307                          psz_filename );
 308                 i_ret = func( p_this, psz_filename, user_data );
 309                 free( psz_filename );
 310                 if( i_ret == VLC_SUCCESS )
 311                     break;
 312             }
 313         }
 314
 315         while( ppsz_file < ppsz_fileend )
 316             free( *(ppsz_file++) );
 317         free( ppsz_filelist );
 318
 319         if( i_ret == VLC_SUCCESS )
 320             break;
 321     }
 322     vlclua_dir_list_free( ppsz_dir_list );
 323     return i_ret;
 324 }
 325
 326 char *vlclua_find_file( vlc_object_t *p_this, const char *psz_luadirname, const char *psz_name )
 327 {
 328     char **ppsz_dir_list = NULL;
 329     char **ppsz_dir;
 330     vlclua_dir_list( p_this, psz_luadirname, &ppsz_dir_list );
 331     for( ppsz_dir = ppsz_dir_list; *ppsz_dir; ppsz_dir++ )
 332     {
 333         for( const char **ppsz_ext = ppsz_lua_exts; *ppsz_ext; ppsz_ext++ )
 334         {
 335             char *psz_filename;
 336             struct stat st;
 337
 338             if( asprintf( &psz_filename, "%s"DIR_SEP"%s%s", *ppsz_dir,
 339                           psz_name, *ppsz_ext ) < 0 )
 340             {
 341                 vlclua_dir_list_free( ppsz_dir_list );
 342                 return NULL;
 343             }
 344
 345             if( vlc_stat( psz_filename, &st ) == 0
 346                 && S_ISREG( st.st_mode ) )
 347             {
 348                 vlclua_dir_list_free( ppsz_dir_list );
 349                 return psz_filename;
 350             }
 351             free( psz_filename );
 352         }
 353     }
 354     vlclua_dir_list_free( ppsz_dir_list );
 355     return NULL;
 356 }
 357
 358 /*****************************************************************************
 359  * Meta data setters utility.
 360  * Playlist item table should be on top of the stack when these are called
 361  *****************************************************************************/
 362 void __vlclua_read_meta_data( vlc_object_t *p_this, lua_State *L,
 363                               input_item_t *p_input )
 364 {
 365 #define TRY_META( a, b )                                        \
 366     lua_getfield( L, -1, a );                                   \
 367     if( lua_isstring( L, -1 ) &&                                \
 368         strcmp( lua_tostring( L, -1 ), "" ) )                   \
 369     {                                                           \
 370         char *psz_value = strdup( lua_tostring( L, -1 ) );      \
 371         EnsureUTF8( psz_value );                                \
 372         msg_Dbg( p_this, #b ": %s", psz_value );                \
 373         input_item_Set ## b ( p_input, psz_value );             \
 374         free( psz_value );                                      \
 375     }                                                           \
 376     lua_pop( L, 1 ); /* pop a */
 377     TRY_META( "title", Title );
 378     TRY_META( "artist", Artist );
 379     TRY_META( "genre", Genre );
 380     TRY_META( "copyright", Copyright );
 381     TRY_META( "album", Album );
 382     TRY_META( "tracknum", TrackNum );
 383     TRY_META( "description", Description );
 384     TRY_META( "rating", Rating );
 385     TRY_META( "date", Date );
 386     TRY_META( "setting", Setting );
 387     TRY_META( "url", URL );
 388     TRY_META( "language", Language );
 389     TRY_META( "nowplaying", NowPlaying );
 390     TRY_META( "publisher", Publisher );
 391     TRY_META( "encodedby", EncodedBy );
 392     TRY_META( "arturl", ArtURL );
 393     TRY_META( "trackid", TrackID );
 394 }
 395
 396 void __vlclua_read_custom_meta_data( vlc_object_t *p_this, lua_State *L,
 397                                      input_item_t *p_input )
 398 {
 399     /* ... item */
 400     lua_getfield( L, -1, "meta" );
 401     /* ... item meta */
 402     if( lua_istable( L, -1 ) )
 403     {
 404         lua_pushnil( L );
 405         /* ... item meta nil */
 406         while( lua_next( L, -2 ) )
 407         {
 408             /* ... item meta key value */
 409             if( !lua_isstring( L, -2 ) )
 410             {
 411                 msg_Warn( p_this, "Custom meta data category name must be "
 412                                    "a string" );
 413             }
 414             else if( !lua_istable( L, -1 ) )
 415             {
 416                 msg_Warn( p_this, "Custom meta data category contents "
 417                                    "must be a table" );
 418             }
 419             else
 420             {
 421                 const char *psz_meta_category = lua_tostring( L, -2 );
 422                 msg_Dbg( p_this, "Found custom meta data category: %s",
 423                          psz_meta_category );
 424                 lua_pushnil( L );
 425                 /* ... item meta key value nil */
 426                 while( lua_next( L, -2 ) )
 427                 {
 428                     /* ... item meta key value key2 value2 */
 429                     if( !lua_isstring( L, -2 ) )
 430                     {
 431                         msg_Warn( p_this, "Custom meta category item name "
 432                                            "must be a string." );
 433                     }
 434                     else if( !lua_isstring( L, -1 ) )
 435                     {
 436                         msg_Warn( p_this, "Custom meta category item value "
 437                                            "must be a string." );
 438                     }
 439                     else
 440                     {
 441                         const char *psz_meta_name =
 442                             lua_tostring( L, -2 );
 443                         const char *psz_meta_value =
 444                             lua_tostring( L, -1 );
 445                         msg_Dbg( p_this, "Custom meta %s, %s: %s",
 446                                  psz_meta_category, psz_meta_name,
 447                                  psz_meta_value );
 448                         input_item_AddInfo( p_input, psz_meta_category,
 449                                            psz_meta_name, "%s", psz_meta_value );
 450                     }
 451                     lua_pop( L, 1 ); /* pop item */
 452                     /* ... item meta key value key2 */
 453                 }
 454                 /* ... item meta key value */
 455             }
 456             lua_pop( L, 1 ); /* pop category */
 457             /* ... item meta key */
 458         }
 459         /* ... item meta */
 460     }
 461     lua_pop( L, 1 ); /* pop "meta" */
 462     /* ... item -> back to original stack */
 463 }
 464
 465 /*****************************************************************************
 466  * Playlist utilities
 467  ****************************************************************************/
 468 /**
 469  * Playlist item table should be on top of the stack when this is called
 470  */
 471 void __vlclua_read_options( vlc_object_t *p_this, lua_State *L,
 472                             int *pi_options, char ***pppsz_options )
 473 {
 474     lua_getfield( L, -1, "options" );
 475     if( lua_istable( L, -1 ) )
 476     {
 477         lua_pushnil( L );
 478         while( lua_next( L, -2 ) )
 479         {
 480             if( lua_isstring( L, -1 ) )
 481             {
 482                 char *psz_option = strdup( lua_tostring( L, -1 ) );
 483                 msg_Dbg( p_this, "Option: %s", psz_option );
 484                 INSERT_ELEM( *pppsz_options, *pi_options, *pi_options,
 485                              psz_option );
 486             }
 487             else
 488             {
 489                 msg_Warn( p_this, "Option should be a string" );
 490             }
 491             lua_pop( L, 1 ); /* pop option */
 492         }
 493     }
 494     lua_pop( L, 1 ); /* pop "options" */
 495 }
 496
 497 int __vlclua_playlist_add_internal( vlc_object_t *p_this, lua_State *L,
 498                                     playlist_t *p_playlist,
 499                                     input_item_t *p_parent, bool b_play )
 500 {
 501     int i_count = 0;
 502     input_item_node_t *p_parent_node = NULL;
 503
 504     assert( p_parent || p_playlist );
 505
 506     /* playlist */
 507     if( lua_istable( L, -1 ) )
 508     {
 509         if( p_parent ) p_parent_node = input_item_node_Create( p_parent );
 510         lua_pushnil( L );
 511         /* playlist nil */
 512         while( lua_next( L, -2 ) )
 513         {
 514             /* playlist key item */
 515             /* <Parse playlist item> */
 516             if( lua_istable( L, -1 ) )
 517             {
 518                 lua_getfield( L, -1, "path" );
 519                 /* playlist key item path */
 520                 if( lua_isstring( L, -1 ) )
 521                 {
 522                     const char   *psz_path     = NULL;
 523                     const char   *psz_name     = NULL;
 524                     char        **ppsz_options = NULL;
 525                     int           i_options    = 0;
 526                     mtime_t       i_duration   = -1;
 527                     input_item_t *p_input;
 528
 529                     /* Read path and name */
 530                     psz_path = lua_tostring( L, -1 );
 531                     msg_Dbg( p_this, "Path: %s", psz_path );
 532                     lua_getfield( L, -2, "name" );
 533                     /* playlist key item path name */
 534                     if( lua_isstring( L, -1 ) )
 535                     {
 536                         psz_name = lua_tostring( L, -1 );
 537                         msg_Dbg( p_this, "Name: %s", psz_name );
 538                     }
 539                     else
 540                     {
 541                         if( !lua_isnil( L, -1 ) )
 542                             msg_Warn( p_this, "Playlist item name should be a string." );
 543                         psz_name = psz_path;
 544                     }
 545
 546                     /* Read duration */
 547                     lua_getfield( L, -3, "duration" );
 548                     /* playlist key item path name duration */
 549                     if( lua_isnumber( L, -1 ) )
 550                     {
 551                         i_duration = (mtime_t)(lua_tonumber( L, -1 )*1e6);
 552                     }
 553                     else if( !lua_isnil( L, -1 ) )
 554                     {
 555                         msg_Warn( p_this, "Playlist item duration should be a number (in seconds)." );
 556                     }
 557                     lua_pop( L, 1 ); /* pop "duration" */
 558
 559                     /* playlist key item path name */
 560
 561                     /* Read options: item must be on top of stack */
 562                     lua_pushvalue( L, -3 );
 563                     /* playlist key item path name item */
 564                     vlclua_read_options( p_this, L, &i_options, &ppsz_options );
 565
 566                     /* Create input item */
 567                     p_input = input_item_NewExt( p_playlist, psz_path,
 568                                                 psz_name, i_options,
 569                                                 (const char **)ppsz_options,
 570                                                 VLC_INPUT_OPTION_TRUSTED,
 571                                                 i_duration );
 572                     lua_pop( L, 3 ); /* pop "path name item" */
 573                     /* playlist key item */
 574
 575                     /* Read meta data: item must be on top of stack */
 576                     vlclua_read_meta_data( p_this, L, p_input );
 577
 578                     /* Read custom meta data: item must be on top of stack*/
 579                     vlclua_read_custom_meta_data( p_this, L, p_input );
 580
 581                     /* Append item to playlist */
 582                     if( p_parent ) /* Add to node */
 583                     {
 584                         input_item_node_AppendItem( p_parent_node, p_input );
 585                     }
 586                     else /* Play or Enqueue (preparse) */
 587                         /* FIXME: playlist_AddInput() can fail */
 588                         playlist_AddInput( p_playlist, p_input,
 589                                PLAYLIST_APPEND |
 590                                ( b_play ? PLAYLIST_GO : PLAYLIST_PREPARSE ),
 591                                PLAYLIST_END, true, false );
 592                     i_count ++; /* increment counter */
 593                     vlc_gc_decref( p_input );
 594                     while( i_options > 0 )
 595                         free( ppsz_options[--i_options] );
 596                     free( ppsz_options );
 597                 }
 598                 else
 599                 {
 600                     lua_pop( L, 1 ); /* pop "path" */
 601                     msg_Warn( p_this,
 602                              "Playlist item's path should be a string" );
 603                 }
 604                 /* playlist key item */
 605             }
 606             else
 607             {
 608                 msg_Warn( p_this, "Playlist item should be a table" );
 609             }
 610             /* <Parse playlist item> */
 611             lua_pop( L, 1 ); /* pop the value, keep the key for
 612                               * the next lua_next() call */
 613             /* playlist key */
 614         }
 615         /* playlist */
 616         if( p_parent )
 617         {
 618             if( i_count ) input_item_node_PostAndDelete( p_parent_node );
 619             else input_item_node_Delete( p_parent_node );
 620         }
 621     }
 622     else
 623     {
 624         msg_Warn( p_this, "Playlist should be a table." );
 625     }
 626     return i_count;
 627 }
 628
 629 static int vlc_sd_probe_Open( vlc_object_t *obj )
 630 {
 631     vlc_probe_t *probe = (vlc_probe_t *)obj;
 632     char **ppsz_filelist = NULL;
 633     char **ppsz_fileend  = NULL;
 634     char **ppsz_file;
 635     char *psz_name;
 636     char **ppsz_dir_list = NULL;
 637     char **ppsz_dir;
 638     lua_State *L = NULL;
 639     vlclua_dir_list( obj, "sd", &ppsz_dir_list );
 640     for( ppsz_dir = ppsz_dir_list; *ppsz_dir; ppsz_dir++ )
 641     {
 642         int i_files;
 643         if( ppsz_filelist )
 644         {
 645             for( ppsz_file = ppsz_filelist; ppsz_file < ppsz_fileend;
 646                  ppsz_file++ )
 647                 free( *ppsz_file );
 648             free( ppsz_filelist );
 649             ppsz_filelist = NULL;
 650         }
 651         i_files = vlc_scandir( *ppsz_dir, &ppsz_filelist, file_select,
 652                                 file_compare );
 653         if( i_files < 1 ) continue;
 654         ppsz_fileend = ppsz_filelist + i_files;
 655         for( ppsz_file = ppsz_filelist; ppsz_file < ppsz_fileend; ppsz_file++ )
 656         {
 657             char  *psz_filename;
 658             if( asprintf( &psz_filename,
 659                           "%s" DIR_SEP "%s", *ppsz_dir, *ppsz_file ) < 0 )
 660             {
 661                 goto error;
 662             }
 663             L = luaL_newstate();
 664             if( !L )
 665             {
 666                 msg_Err( probe, "Could not create new Lua State" );
 667                 free( psz_filename );
 668                 goto error;
 669             }
 670             luaL_openlibs( L );
 671             if( vlclua_add_modules_path( probe, L, psz_filename ) )
 672             {
 673                 msg_Err( probe, "Error while setting the module search path for %s",
 674                           psz_filename );
 675                 free( psz_filename );
 676                 goto error;
 677             }
 678             if( luaL_dofile( L, psz_filename ) )
 679             {
 680
 681                 msg_Err( probe, "Error loading script %s: %s", psz_filename,
 682                           lua_tostring( L, lua_gettop( L ) ) );
 683                 lua_pop( L, 1 );
 684                 free( psz_filename );
 685                 lua_close( L );
 686                 continue;
 687             }
 688             char *psz_longname;
 689             char *temp = strchr( *ppsz_file, '.' );
 690             if( temp )
 691                 *temp = '\0';
 692             lua_getglobal( L, "descriptor" );
 693             if( !lua_isfunction( L, lua_gettop( L ) ) || lua_pcall( L, 0, 1, 0 ) )
 694             {
 695                 msg_Warn( probe, "No 'descriptor' function in '%s'", psz_filename );
 696                 lua_pop( L, 1 );
 697                 if( !( psz_longname = strdup( *ppsz_file ) ) )
 698                 {
 699                     free( psz_filename );
 700                     goto error;
 701                 }
 702             }
 703             else
 704             {
 705                 lua_getfield( L, -1, "title" );
 706                 if( !lua_isstring( L, -1 ) ||
 707                     !( psz_longname = strdup( lua_tostring( L, -1 ) ) ) )
 708                 {
 709                     free( psz_filename );
 710                     goto error;
 711                 }
 712             }
 713
 714             char *psz_file_esc = config_StringEscape( *ppsz_file );
 715             char *psz_longname_esc = config_StringEscape( psz_longname );
 716             if( asprintf( &psz_name, "lua{sd='%s',longname='%s'}",
 717                           psz_file_esc, psz_longname_esc ) < 0 )
 718             {
 719                 free( psz_file_esc );
 720                 free( psz_longname_esc );
 721                 free( psz_filename );
 722                 free( psz_longname );
 723                 goto error;
 724             }
 725             free( psz_file_esc );
 726             free( psz_longname_esc );
 727             vlc_sd_probe_Add( probe, psz_name, psz_longname, SD_CAT_INTERNET );
 728             free( psz_name );
 729             free( psz_longname );
 730             free( psz_filename );
 731             lua_close( L );
 732         }
 733     }
 734     if( ppsz_filelist )
 735     {
 736         for( ppsz_file = ppsz_filelist; ppsz_file < ppsz_fileend;
 737              ppsz_file++ )
 738             free( *ppsz_file );
 739         free( ppsz_filelist );
 740     }
 741     vlclua_dir_list_free( ppsz_dir_list );
 742     return VLC_PROBE_CONTINUE;
 743 error:
 744     if( ppsz_filelist )
 745     {
 746         for( ppsz_file = ppsz_filelist; ppsz_file < ppsz_fileend;
 747              ppsz_file++ )
 748             free( *ppsz_file );
 749         free( ppsz_filelist );
 750     }
 751     if( L )
 752         lua_close( L );
 753     vlclua_dir_list_free( ppsz_dir_list );
 754     return VLC_ENOMEM;
 755 }
 756
 757 static int vlclua_add_modules_path_inner( lua_State *L, const char *psz_path )
 758 {
 759     int count = 0;
 760     for( const char **ppsz_ext = ppsz_lua_exts; *ppsz_ext; ppsz_ext++ )
 761     {
 762         lua_pushfstring( L, "%s"DIR_SEP"modules"DIR_SEP"?%s;",
 763                          psz_path, *ppsz_ext );
 764         count ++;
 765     }
 766
 767     return count;
 768 }
 769
 770 int __vlclua_add_modules_path( vlc_object_t *obj, lua_State *L, const char *psz_filename )
 771 {
 772     /* Setup the module search path:
 773      *   * "The script's directory"/modules
 774      *   * "The script's parent directory"/modules
 775      *   * and so on for all the next directories in the directory list
 776      */
 777     char *psz_path = strdup( psz_filename );
 778     if( !psz_path )
 779         return 1;
 780
 781     char *psz_char = strrchr( psz_path, DIR_SEP_CHAR );
 782     if( !psz_char )
 783     {
 784         free( psz_path );
 785         return 1;
 786     }
 787     *psz_char = '\0';
 788
 789     /* psz_path now holds the file's directory */
 790     psz_char = strrchr( psz_path, DIR_SEP_CHAR );
 791     if( !psz_char )
 792     {
 793         free( psz_path );
 794         return 1;
 795     }
 796     *psz_char = '\0';
 797
 798     /* Push package on stack */
 799     int count = 0;
 800     lua_getglobal( L, "package" );
 801
 802     /* psz_path now holds the file's parent directory */
 803     count += vlclua_add_modules_path_inner( L, psz_path );
 804     *psz_char = DIR_SEP_CHAR;
 805
 806     /* psz_path now holds the file's directory */
 807     count += vlclua_add_modules_path_inner( L, psz_path );
 808
 809     char **ppsz_dir_list = NULL;
 810     vlclua_dir_list( obj, psz_char+1/* gruik? */, &ppsz_dir_list );
 811     char **ppsz_dir = ppsz_dir_list;
 812
 813     for( ; *ppsz_dir && strcmp( *ppsz_dir, psz_path ); ppsz_dir++ );
 814     free( psz_path );
 815
 816     for( ; *ppsz_dir; ppsz_dir++ )
 817     {
 818         psz_path = *ppsz_dir;
 819         /* FIXME: doesn't work well with meta/... modules due to the double
 820          * directory depth */
 821         psz_char = strrchr( psz_path, DIR_SEP_CHAR );
 822         if( !psz_char )
 823         {
 824             vlclua_dir_list_free( ppsz_dir_list );
 825             return 1;
 826         }
 827
 828         *psz_char = '\0';
 829         count += vlclua_add_modules_path_inner( L, psz_path );
 830         *psz_char = DIR_SEP_CHAR;
 831         count += vlclua_add_modules_path_inner( L, psz_path );
 832     }
 833
 834     lua_getfield( L, -(count+1), "path" ); /* Get package.path */
 835     lua_concat( L, count+1 ); /* Concat vlc module paths and package.path */
 836     lua_setfield( L, -2, "path"); /* Set package.path */
 837     lua_pop( L, 1 ); /* Pop the package module */
 838
 839     vlclua_dir_list_free( ppsz_dir_list );
 840     return 0;
 841 }
 842