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