modules/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 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <assert.h>
  33 #include <sys/stat.h>
  34
  35 #define VLC_MODULE_LICENSE VLC_LICENSE_GPL_2_PLUS
  36
  37 #include "vlc.h"
  38
  39 #include <vlc_plugin.h>
  40 #include <vlc_arrays.h>
  41 #include <vlc_charset.h>
  42 #include <vlc_fs.h>
  43 #include <vlc_services_discovery.h>
  44 #include <vlc_stream.h>
  45
  46 /*****************************************************************************
  47  * Module descriptor
  48  *****************************************************************************/
  49 #define INTF_TEXT N_("Lua interface")
  50 #define INTF_LONGTEXT N_("Lua interface module to load")
  51
  52 #define CONFIG_TEXT N_("Lua interface configuration")
  53 #define CONFIG_LONGTEXT N_("Lua interface configuration string. Format is: '[\"<interface module name>\"] = { <option> = <value>, ...}, ...'.")
  54 #define PASS_TEXT N_( "Password" )
  55 #define PASS_LONGTEXT N_( "A single password restricts access " \
  56     "to this interface." )
  57 #define SRC_TEXT N_( "Source directory" )
  58 #define SRC_LONGTEXT N_( "Source directory" )
  59 #define INDEX_TEXT N_( "Directory index" )
  60 #define INDEX_LONGTEXT N_( "Allow to build directory index" )
  61
  62 #define TELNETHOST_TEXT N_( "Host" )
  63 #define TELNETHOST_LONGTEXT N_( "This is the host on which the " \
  64     "interface will listen. It defaults to all network interfaces (0.0.0.0)." \
  65     " If you want this interface to be available only on the local " \
  66     "machine, enter \"127.0.0.1\"." )
  67 #define TELNETPORT_TEXT N_( "Port" )
  68 #define TELNETPORT_LONGTEXT N_( "This is the TCP port on which this " \
  69     "interface will listen. It defaults to 4212." )
  70 #define TELNETPWD_TEXT N_( "Password" )
  71 #define TELNETPWD_LONGTEXT N_( "A single password restricts access " \
  72     "to this interface." )
  73 #define RCHOST_TEXT N_("TCP command input")
  74 #define RCHOST_LONGTEXT N_("Accept commands over a socket rather than stdin. " \
  75             "You can set the address and port the interface will bind to." )
  76 #define CLIHOST_TEXT N_("CLI input")
  77 #define CLIHOST_LONGTEXT N_( "Accept commands from this source. " \
  78     "The CLI defaults to stdin (\"*console\"), but can also bind to a " \
  79     "plain TCP socket (\"localhost:4212\") or use the telnet protocol " \
  80     "(\"telnet://0.0.0.0:4212\")" )
  81
  82 static int vlc_sd_probe_Open( vlc_object_t * );
  83
  84 vlc_module_begin ()
  85         set_shortname( N_("Lua") )
  86         set_description( N_("Lua interpreter") )
  87         set_category( CAT_INTERFACE )
  88         set_subcategory( SUBCAT_INTERFACE_MAIN )
  89
  90         add_string( "lua-intf", "dummy", INTF_TEXT, INTF_LONGTEXT, false )
  91         add_string( "lua-config", "", CONFIG_TEXT, CONFIG_LONGTEXT, false )
  92         set_capability( "interface", 0 )
  93         set_callbacks( Open_LuaIntf, Close_LuaIntf )
  94         add_shortcut( "luaintf" )
  95
  96     add_submodule ()
  97         set_section( N_("Lua HTTP"), 0 )
  98             add_password ( "http-password", NULL, PASS_TEXT, PASS_LONGTEXT, false )
  99             add_string ( "http-src",  NULL, SRC_TEXT,  SRC_LONGTEXT,  true )
 100             add_bool   ( "http-index", false, INDEX_TEXT, INDEX_LONGTEXT, true )
 101         set_capability( "interface", 0 )
 102         set_callbacks( Open_LuaHTTP, Close_LuaIntf )
 103         add_shortcut( "luahttp", "http" )
 104         set_description( N_("Lua HTTP") )
 105
 106     add_submodule ()
 107         set_section( N_("Lua CLI"), 0 )
 108             add_string( "rc-host", NULL, RCHOST_TEXT, RCHOST_LONGTEXT, true )
 109             add_string( "cli-host", NULL, CLIHOST_TEXT, CLIHOST_LONGTEXT, true )
 110         set_capability( "interface", 25 )
 111         set_description( N_("Command-line interface") )
 112         set_callbacks( Open_LuaCLI, Close_LuaIntf )
 113 #ifndef _WIN32
 114         add_shortcut( "luacli", "luarc", "cli", "rc" )
 115 #else
 116         add_shortcut( "luacli", "luarc" )
 117 #endif
 118
 119     add_submodule ()
 120         set_section( N_("Lua Telnet"), 0 )
 121             add_string( "telnet-host", "localhost", TELNETHOST_TEXT,
 122                         TELNETHOST_LONGTEXT, true )
 123             add_integer( "telnet-port", TELNETPORT_DEFAULT, TELNETPORT_TEXT,
 124                          TELNETPORT_LONGTEXT, true )
 125                 change_integer_range( 1, 65535 )
 126             add_password( "telnet-password", NULL, TELNETPWD_TEXT,
 127
 128                           TELNETPWD_LONGTEXT, true )
 129         set_capability( "interface", 0 )
 130         set_callbacks( Open_LuaTelnet, Close_LuaIntf )
 131         set_description( N_("Lua Telnet") )
 132         add_shortcut( "luatelnet", "telnet" )
 133
 134     add_submodule ()
 135         set_shortname( N_( "Lua Meta Fetcher" ) )
 136         set_description( N_("Fetch meta data using lua scripts") )
 137         set_capability( "meta fetcher", 10 )
 138         set_callbacks( FetchMeta, NULL )
 139
 140     add_submodule ()
 141         set_shortname( N_( "Lua Meta Reader" ) )
 142         set_description( N_("Read meta data using lua scripts") )
 143         set_capability( "meta reader", 10 )
 144         set_callbacks( ReadMeta, NULL )
 145
 146     add_submodule ()
 147         add_shortcut( "luaplaylist" )
 148         set_shortname( N_("Lua Playlist") )
 149         set_description( N_("Lua Playlist Parser Interface") )
 150         set_capability( "stream_filter", 302 )
 151         set_callbacks( Import_LuaPlaylist, Close_LuaPlaylist )
 152
 153     add_submodule ()
 154         set_shortname( N_( "Lua Art" ) )
 155         set_description( N_("Fetch artwork using lua scripts") )
 156         set_capability( "art finder", 10 )
 157         set_callbacks( FindArt, NULL )
 158
 159     add_submodule ()
 160         set_shortname( N_("Lua Extension") )
 161         set_description( N_("Lua Extension") )
 162         add_shortcut( "luaextension" )
 163         set_capability( "extension", 1 )
 164         set_callbacks( Open_Extension, Close_Extension )
 165
 166     add_submodule ()
 167         set_description( N_("Lua SD Module") )
 168         add_shortcut( "luasd" )
 169         set_capability( "services_discovery", 0 )
 170         add_string( "lua-sd", "", NULL, NULL, false )
 171             change_volatile()
 172         set_callbacks( Open_LuaSD, Close_LuaSD )
 173
 174     VLC_SD_PROBE_SUBMODULE
 175
 176 vlc_module_end ()
 177
 178 /*****************************************************************************
 179  *
 180  *****************************************************************************/
 181 static const char *ppsz_lua_exts[] = { ".luac", ".lua", ".vle", NULL };
 182 static int file_select( const char *file )
 183 {
 184     int i = strlen( file );
 185     int j;
 186     for( j = 0; ppsz_lua_exts[j]; j++ )
 187     {
 188         int l = strlen( ppsz_lua_exts[j] );
 189         if( i >= l && !strcmp( file+i-l, ppsz_lua_exts[j] ) )
 190             return 1;
 191     }
 192     return 0;
 193 }
 194
 195 static int file_compare( const char **a, const char **b )
 196 {
 197     return strcmp( *a, *b );
 198 }
 199
 200 static char **vlclua_dir_list_append( char **restrict list, char *basedir,
 201                                       const char *luadirname )
 202 {
 203     if (unlikely(basedir == NULL))
 204         return list;
 205
 206     if (likely(asprintf(list, "%s"DIR_SEP"lua"DIR_SEP"%s",
 207                         basedir, luadirname) != -1))
 208         list++;
 209
 210     free(basedir);
 211     return list;
 212 }
 213
 214 int vlclua_dir_list(const char *luadirname, char ***restrict listp)
 215 {
 216     char **list = malloc(4 * sizeof(char *));
 217     if (unlikely(list == NULL))
 218         return VLC_EGENERIC;
 219
 220     *listp = list;
 221
 222     /* Lua scripts in user-specific data directory */
 223     list = vlclua_dir_list_append(list, config_GetUserDir(VLC_USERDATA_DIR),
 224                                   luadirname);
 225
 226     char *libdir = config_GetSysPath(VLC_PKG_LIBEXEC_DIR, NULL);
 227     char *datadir = config_GetSysPath(VLC_PKG_DATA_DIR, NULL);
 228     bool both = libdir != NULL && datadir != NULL && strcmp(libdir, datadir);
 229
 230     /* Tokenized Lua scripts in architecture-specific data directory */
 231     list = vlclua_dir_list_append(list, libdir, luadirname);
 232
 233     /* Source Lua Scripts in architecture-independent data directory */
 234     if (both || libdir == NULL)
 235         list = vlclua_dir_list_append(list, datadir, luadirname);
 236
 237     *list = NULL;
 238     return VLC_SUCCESS;
 239 }
 240
 241 void vlclua_dir_list_free( char **ppsz_dir_list )
 242 {
 243     for( char **ppsz_dir = ppsz_dir_list; *ppsz_dir; ppsz_dir++ )
 244         free( *ppsz_dir );
 245     free( ppsz_dir_list );
 246 }
 247
 248 /*****************************************************************************
 249  * Will execute func on all scripts in luadirname, and stop if func returns
 250  * success.
 251  *****************************************************************************/
 252 int vlclua_scripts_batch_execute( vlc_object_t *p_this,
 253                                   const char * luadirname,
 254                                   int (*func)(vlc_object_t *, const char *, const luabatch_context_t *),
 255                                   void * user_data)
 256 {
 257     char **ppsz_dir_list = NULL;
 258     int i_ret;
 259
 260     if( (i_ret = vlclua_dir_list( luadirname, &ppsz_dir_list )) != VLC_SUCCESS)
 261         return i_ret;
 262
 263     i_ret = VLC_EGENERIC;
 264     for( char **ppsz_dir = ppsz_dir_list; *ppsz_dir; ppsz_dir++ )
 265     {
 266         char **ppsz_filelist;
 267
 268         msg_Dbg( p_this, "Trying Lua scripts in %s", *ppsz_dir );
 269         int i_files = vlc_scandir( *ppsz_dir, &ppsz_filelist, file_select,
 270                                    file_compare );
 271         if( i_files < 0 )
 272             continue;
 273
 274         char **ppsz_file = ppsz_filelist;
 275         char **ppsz_fileend = ppsz_filelist + i_files;
 276
 277         while( ppsz_file < ppsz_fileend )
 278         {
 279             char *psz_filename;
 280
 281             if( asprintf( &psz_filename,
 282                           "%s" DIR_SEP "%s", *ppsz_dir, *ppsz_file ) == -1 )
 283                 psz_filename = NULL;
 284             free( *(ppsz_file++) );
 285
 286             if( likely(psz_filename != NULL) )
 287             {
 288                 msg_Dbg( p_this, "Trying Lua playlist script %s", psz_filename );
 289                 i_ret = func( p_this, psz_filename, user_data );
 290                 free( psz_filename );
 291                 if( i_ret == VLC_SUCCESS )
 292                     break;
 293             }
 294         }
 295
 296         while( ppsz_file < ppsz_fileend )
 297             free( *(ppsz_file++) );
 298         free( ppsz_filelist );
 299
 300         if( i_ret == VLC_SUCCESS )
 301             break;
 302     }
 303     vlclua_dir_list_free( ppsz_dir_list );
 304     return i_ret;
 305 }
 306
 307 char *vlclua_find_file( const char *psz_luadirname, const char *psz_name )
 308 {
 309     char **ppsz_dir_list = NULL;
 310     vlclua_dir_list( psz_luadirname, &ppsz_dir_list );
 311
 312     for( char **ppsz_dir = ppsz_dir_list; *ppsz_dir; ppsz_dir++ )
 313     {
 314         for( const char **ppsz_ext = ppsz_lua_exts; *ppsz_ext; ppsz_ext++ )
 315         {
 316             char *psz_filename;
 317             struct stat st;
 318
 319             if( asprintf( &psz_filename, "%s"DIR_SEP"%s%s", *ppsz_dir,
 320                           psz_name, *ppsz_ext ) < 0 )
 321             {
 322                 vlclua_dir_list_free( ppsz_dir_list );
 323                 return NULL;
 324             }
 325
 326             if( vlc_stat( psz_filename, &st ) == 0
 327                 && S_ISREG( st.st_mode ) )
 328             {
 329                 vlclua_dir_list_free( ppsz_dir_list );
 330                 return psz_filename;
 331             }
 332             free( psz_filename );
 333         }
 334     }
 335     vlclua_dir_list_free( ppsz_dir_list );
 336     return NULL;
 337 }
 338
 339 /*****************************************************************************
 340  * Meta data setters utility.
 341  * Playlist item table should be on top of the stack when these are called
 342  *****************************************************************************/
 343 #undef vlclua_read_meta_data
 344 void vlclua_read_meta_data( vlc_object_t *p_this, lua_State *L,
 345                             input_item_t *p_input )
 346 {
 347 #define TRY_META( a, b )                                        \
 348     lua_getfield( L, -1, a );                                   \
 349     if( lua_isstring( L, -1 ) &&                                \
 350         strcmp( lua_tostring( L, -1 ), "" ) )                   \
 351     {                                                           \
 352         char *psz_value = strdup( lua_tostring( L, -1 ) );      \
 353         EnsureUTF8( psz_value );                                \
 354         msg_Dbg( p_this, #b ": %s", psz_value );                \
 355         input_item_Set ## b ( p_input, psz_value );             \
 356         free( psz_value );                                      \
 357     }                                                           \
 358     lua_pop( L, 1 ); /* pop a */
 359     TRY_META( "title", Title );
 360     TRY_META( "artist", Artist );
 361     TRY_META( "genre", Genre );
 362     TRY_META( "copyright", Copyright );
 363     TRY_META( "album", Album );
 364     TRY_META( "tracknum", TrackNum );
 365     TRY_META( "description", Description );
 366     TRY_META( "rating", Rating );
 367     TRY_META( "date", Date );
 368     TRY_META( "setting", Setting );
 369     TRY_META( "url", URL );
 370     TRY_META( "language",  Language );
 371     TRY_META( "nowplaying", NowPlaying );
 372     TRY_META( "publisher",  Publisher );
 373     TRY_META( "encodedby",  EncodedBy );
 374     TRY_META( "arturl",     ArtURL );
 375     TRY_META( "trackid",    TrackID );
 376     TRY_META( "director",   Director );
 377     TRY_META( "season",     Season );
 378     TRY_META( "episode",    Episode );
 379     TRY_META( "show_name",  ShowName );
 380     TRY_META( "actors",     Actors );
 381 }
 382
 383 #undef vlclua_read_custom_meta_data
 384 void vlclua_read_custom_meta_data( vlc_object_t *p_this, lua_State *L,
 385                                      input_item_t *p_input )
 386 {
 387     /* Lock the input item and create the meta table if needed */
 388     vlc_mutex_lock( &p_input->lock );
 389
 390     if( !p_input->p_meta )
 391         p_input->p_meta = vlc_meta_New();
 392
 393     /* ... item */
 394     lua_getfield( L, -1, "meta" );
 395     /* ... item meta */
 396     if( lua_istable( L, -1 ) )
 397     {
 398         lua_pushnil( L );
 399         /* ... item meta nil */
 400         while( lua_next( L, -2 ) )
 401         {
 402             /* ... item meta key value */
 403             if( !lua_isstring( L, -2 ) || !lua_isstring( L, -1 ) )
 404             {
 405                 msg_Err( p_this, "'meta' keys and values must be strings");
 406                 lua_pop( L, 1 ); /* pop "value" */
 407                 continue;
 408             }
 409             const char *psz_key = lua_tostring( L, -2 );
 410             const char *psz_value = lua_tostring( L, -1 );
 411
 412             vlc_meta_AddExtra( p_input->p_meta, psz_key, psz_value );
 413
 414             lua_pop( L, 1 ); /* pop "value" */
 415         }
 416     }
 417     lua_pop( L, 1 ); /* pop "meta" */
 418     /* ... item -> back to original stack */
 419
 420     vlc_mutex_unlock( &p_input->lock );
 421 }
 422
 423 /*****************************************************************************
 424  * Playlist utilities
 425  ****************************************************************************/
 426 /**
 427  * Playlist item table should be on top of the stack when this is called
 428  */
 429 #undef vlclua_read_options
 430 void vlclua_read_options( vlc_object_t *p_this, lua_State *L,
 431                             int *pi_options, char ***pppsz_options )
 432 {
 433     lua_getfield( L, -1, "options" );
 434     if( lua_istable( L, -1 ) )
 435     {
 436         lua_pushnil( L );
 437         while( lua_next( L, -2 ) )
 438         {
 439             if( lua_isstring( L, -1 ) )
 440             {
 441                 char *psz_option = strdup( lua_tostring( L, -1 ) );
 442                 msg_Dbg( p_this, "Option: %s", psz_option );
 443                 TAB_APPEND( *pi_options, *pppsz_options, psz_option );
 444             }
 445             else
 446             {
 447                 msg_Warn( p_this, "Option should be a string" );
 448             }
 449             lua_pop( L, 1 ); /* pop option */
 450         }
 451     }
 452     lua_pop( L, 1 ); /* pop "options" */
 453 }
 454
 455 input_item_t *vlclua_read_input_item(vlc_object_t *obj, lua_State *L)
 456 {
 457     if (!lua_istable(L, -1))
 458     {
 459         msg_Warn(obj, "Playlist item should be a table" );
 460         return NULL;
 461     }
 462
 463     lua_getfield(L, -1, "path");
 464
 465     /* playlist key item path */
 466     if (!lua_isstring(L, -1))
 467     {
 468         lua_pop(L, 1); /* pop "path" */
 469         msg_Warn(obj, "Playlist item's path should be a string");
 470         return NULL;
 471     }
 472
 473     /* Read path and name */
 474     const char *path = lua_tostring(L, -1);
 475     msg_Dbg(obj, "Path: %s", path);
 476
 477     const char *name = NULL;
 478     lua_getfield(L, -2, "name");
 479     if (lua_isstring(L, -1))
 480     {
 481         name = lua_tostring(L, -1);
 482         msg_Dbg(obj, "Name: %s", name);
 483     }
 484     else if (!lua_isnil(L, -1))
 485         msg_Warn(obj, "Playlist item name should be a string" );
 486
 487     /* Read duration */
 488     mtime_t duration = -1;
 489
 490     lua_getfield( L, -3, "duration" );
 491     if (lua_isnumber(L, -1))
 492         duration = (mtime_t)(lua_tonumber(L, -1) * (CLOCK_FREQ * 1.));
 493     else if (!lua_isnil(L, -1))
 494         msg_Warn(obj, "Playlist item duration should be a number (seconds)");
 495     lua_pop( L, 1 ); /* pop "duration" */
 496
 497     /* Read options: item must be on top of stack */
 498     char **optv = NULL;
 499     int optc = 0;
 500
 501     lua_pushvalue(L, -3);
 502     vlclua_read_options(obj, L, &optc, &optv);
 503
 504     /* Create input item */
 505     input_item_t *item = input_item_NewExt(path, name, duration,
 506                                            ITEM_TYPE_UNKNOWN,
 507                                            ITEM_NET_UNKNOWN);
 508     if (unlikely(item == NULL))
 509         goto out;
 510
 511     input_item_AddOptions(item, optc, (const char **)optv,
 512                           VLC_INPUT_OPTION_TRUSTED);
 513     lua_pop(L, 3); /* pop "path name item" */
 514     /* playlist key item */
 515
 516     /* Read meta data: item must be on top of stack */
 517     vlclua_read_meta_data(obj, L, item);
 518
 519     /* copy the psz_name to the meta data, if "Title" is still empty */
 520     char* title = input_item_GetTitle(item);
 521     if (title == NULL)
 522         input_item_SetTitle(item, name);
 523     free(title);
 524
 525     /* Read custom meta data: item must be on top of stack*/
 526     vlclua_read_custom_meta_data(obj, L, item);
 527
 528 out:
 529     while (optc > 0)
 530            free(optv[--optc]);
 531     free(optv);
 532     return item;
 533 }
 534
 535 static int vlc_sd_probe_Open( vlc_object_t *obj )
 536 {
 537     if( lua_Disabled( obj ) )
 538         return VLC_EGENERIC;
 539
 540     vlc_dictionary_t name_d;
 541
 542     char **ppsz_dir_list;
 543     if( vlclua_dir_list( "sd", &ppsz_dir_list ) )
 544         return VLC_ENOMEM;
 545
 546     vlc_dictionary_init( &name_d, 32 );
 547     for( char **ppsz_dir = ppsz_dir_list; *ppsz_dir; ppsz_dir++ )
 548     {
 549         char **ppsz_filelist;
 550         int i_files = vlc_scandir( *ppsz_dir, &ppsz_filelist, file_select,
 551                                     file_compare );
 552         if( i_files < 1 ) continue;
 553
 554         for( char **ppsz_file = ppsz_filelist;
 555              ppsz_file < ppsz_filelist + i_files; ppsz_file++ )
 556         {
 557             char *temp = strchr( *ppsz_file, '.' );
 558             if( temp )
 559                 *temp = '\0';
 560
 561             if( !vlc_dictionary_has_key( &name_d, *ppsz_file ) )
 562                 vlc_dictionary_insert( &name_d, *ppsz_file, &name_d );
 563             free( *ppsz_file );
 564         }
 565         free( ppsz_filelist );
 566     }
 567     vlclua_dir_list_free( ppsz_dir_list );
 568
 569     int r = VLC_PROBE_CONTINUE;
 570     char **names = vlc_dictionary_all_keys( &name_d );
 571     if( names != NULL )
 572     {
 573         for( char **name = names; *name; ++name )
 574         {
 575             r = vlclua_probe_sd( obj, *name );
 576             if( r != VLC_PROBE_CONTINUE )
 577                 break;
 578         }
 579
 580         for( char **name = names; *name; ++name )
 581             free( *name );
 582
 583         free( names );
 584     }
 585     vlc_dictionary_clear( &name_d, NULL, NULL );
 586
 587     return r;
 588 }
 589
 590 static int vlclua_add_modules_path_inner( lua_State *L, const char *psz_path )
 591 {
 592     int count = 0;
 593     for( const char **ppsz_ext = ppsz_lua_exts; *ppsz_ext; ppsz_ext++ )
 594     {
 595         lua_pushfstring( L, "%s"DIR_SEP"modules"DIR_SEP"?%s;",
 596                          psz_path, *ppsz_ext );
 597         count ++;
 598     }
 599
 600     return count;
 601 }
 602
 603 int vlclua_add_modules_path( lua_State *L, const char *psz_filename )
 604 {
 605     /* Setup the module search path:
 606      *   * "The script's directory"/modules
 607      *   * "The script's parent directory"/modules
 608      *   * and so on for all the next directories in the directory list
 609      */
 610     char *psz_path = strdup( psz_filename );
 611     if( !psz_path )
 612         return 1;
 613
 614     char *psz_char = strrchr( psz_path, DIR_SEP_CHAR );
 615     if( !psz_char )
 616     {
 617         free( psz_path );
 618         return 1;
 619     }
 620     *psz_char = '\0';
 621
 622     /* psz_path now holds the file's directory */
 623     psz_char = strrchr( psz_path, DIR_SEP_CHAR );
 624     if( !psz_char )
 625     {
 626         free( psz_path );
 627         return 1;
 628     }
 629     *psz_char = '\0';
 630
 631     /* Push package on stack */
 632     int count = 0;
 633     lua_getglobal( L, "package" );
 634
 635     /* psz_path now holds the file's parent directory */
 636     count += vlclua_add_modules_path_inner( L, psz_path );
 637     *psz_char = DIR_SEP_CHAR;
 638
 639     /* psz_path now holds the file's directory */
 640     count += vlclua_add_modules_path_inner( L, psz_path );
 641
 642     char **ppsz_dir_list = NULL;
 643     vlclua_dir_list( psz_char+1/* gruik? */, &ppsz_dir_list );
 644     char **ppsz_dir = ppsz_dir_list;
 645
 646     for( ; *ppsz_dir && strcmp( *ppsz_dir, psz_path ); ppsz_dir++ );
 647     free( psz_path );
 648
 649     for( ; *ppsz_dir; ppsz_dir++ )
 650     {
 651         psz_path = *ppsz_dir;
 652         /* FIXME: doesn't work well with meta/... modules due to the double
 653          * directory depth */
 654         psz_char = strrchr( psz_path, DIR_SEP_CHAR );
 655         if( !psz_char )
 656         {
 657             vlclua_dir_list_free( ppsz_dir_list );
 658             return 1;
 659         }
 660
 661         *psz_char = '\0';
 662         count += vlclua_add_modules_path_inner( L, psz_path );
 663         *psz_char = DIR_SEP_CHAR;
 664         count += vlclua_add_modules_path_inner( L, psz_path );
 665     }
 666
 667     lua_getfield( L, -(count+1), "path" ); /* Get package.path */
 668     lua_concat( L, count+1 ); /* Concat vlc module paths and package.path */
 669     lua_setfield( L, -2, "path"); /* Set package.path */
 670     lua_pop( L, 1 ); /* Pop the package module */
 671
 672     vlclua_dir_list_free( ppsz_dir_list );
 673     return 0;
 674 }
 675
 676 /** Replacement for luaL_dofile, using VLC's input capabilities */
 677 int vlclua_dofile( vlc_object_t *p_this, lua_State *L, const char *curi )
 678 {
 679     char *uri = ToLocaleDup( curi );
 680     if( !strstr( uri, "://" ) ) {
 681         int ret = luaL_dofile( L, uri );
 682         free( uri );
 683         return ret;
 684     }
 685     if( !strncasecmp( uri, "file://", 7 ) ) {
 686         int ret = luaL_dofile( L, uri + 7 );
 687         free( uri );
 688         return ret;
 689     }
 690     stream_t *s = vlc_stream_NewURL( p_this, uri );
 691     if( !s )
 692     {
 693         free( uri );
 694         return 1;
 695     }
 696     int64_t i_size = stream_Size( s );
 697     char *p_buffer = ( i_size > 0 ) ? malloc( i_size ) : NULL;
 698     if( !p_buffer )
 699     {
 700         // FIXME: read the whole stream until we reach the end (if no size)
 701         vlc_stream_Delete( s );
 702         free( uri );
 703         return 1;
 704     }
 705     int64_t i_read = vlc_stream_Read( s, p_buffer, (int) i_size );
 706     int i_ret = ( i_read == i_size ) ? 0 : 1;
 707     if( !i_ret )
 708         i_ret = luaL_loadbuffer( L, p_buffer, (size_t) i_size, uri );
 709     if( !i_ret )
 710         i_ret = lua_pcall( L, 0, LUA_MULTRET, 0 );
 711     vlc_stream_Delete( s );
 712     free( p_buffer );
 713     free( uri );
 714     return i_ret;
 715 }