1 /*****************************************************************************
2 * cmdline.c: command line parsing
3 *****************************************************************************
4 * Copyright (C) 2001-2007 the VideoLAN team
7 * Authors: Gildas Bazin <gbazin@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
28 #include <vlc_common.h>
29 #include "../libvlc.h"
31 #include <vlc_charset.h>
33 #ifdef HAVE_GETOPT_LONG
35 # include <getopt.h> /* getopt() */
38 # include "../extras/getopt.h"
41 #include "configuration.h"
42 #include "modules/modules.h"
46 #undef config_LoadCmdLine
48 * Parse command line for configuration options.
50 * Now that the module_bank has been initialized, we can dynamically
51 * generate the longopts structure used by getops. We have to do it this way
52 * because we don't know (and don't want to know) in advance the configuration
53 * options used (ie. exported) by each module.
55 * @param p_this object to write command line options as variables to
56 * @param pi_argc number of command line arguments [IN/OUT]
57 * @param ppsz_args commandl ine arguments [IN/OUT]
58 * @param b_ignore_errors whether to ignore parsing errors
59 * @return 0 on success, -1 on error.
61 * @warning This function is not re-entrant (because of getopt_long()).
62 * It must be called with the module bank initialization global lock held.
63 * FIXME: this still breaks if getopt() is used outside of LibVLC.
65 int config_LoadCmdLine( vlc_object_t *p_this, int *pi_argc,
66 const char *ppsz_argv[], bool b_ignore_errors )
68 int i_cmd, i_index, i_opts, i_shortopts, flag, i_verbose = 0;
70 struct option *p_longopts;
71 const char **argv_copy = NULL;
74 module_config_t *pp_shortopts[256];
77 /* List all modules */
78 module_t **list = module_list_get (NULL);
81 * Generate the longopts and shortopts structures used by getopt_long
85 for (size_t i = 0; (p_parser = list[i]) != NULL; i++)
86 /* count the number of exported configuration options (to allocate
87 * longopts). We also need to allocate space for two options when
88 * dealing with boolean to allow for --foo and --no-foo */
89 i_opts += p_parser->i_config_items + 2 * p_parser->i_bool_items;
91 p_longopts = malloc( sizeof(struct option) * (i_opts + 1) );
92 if( p_longopts == NULL )
94 module_list_free (list);
98 psz_shortopts = malloc( sizeof( char ) * (2 * i_opts + 1) );
99 if( psz_shortopts == NULL )
102 module_list_free (list);
106 /* If we are requested to ignore errors, then we must work on a copy
107 * of the ppsz_argv array, otherwise getopt_long will reorder it for
108 * us, ignoring the arity of the options */
109 if( b_ignore_errors )
111 argv_copy = (const char**)malloc( *pi_argc * sizeof(char *) );
112 if( argv_copy == NULL )
114 free( psz_shortopts );
116 module_list_free (list);
119 memcpy( argv_copy, ppsz_argv, *pi_argc * sizeof(char *) );
120 ppsz_argv = argv_copy;
124 for( i_index = 0; i_index < 256; i_index++ )
126 pp_shortopts[i_index] = NULL;
129 /* Fill the p_longopts and psz_shortopts structures */
131 for (size_t i = 0; (p_parser = list[i]) != NULL; i++)
133 module_config_t *p_item, *p_end;
135 if( !p_parser->i_config_items )
138 for( p_item = p_parser->p_config, p_end = p_item + p_parser->confsize;
143 if( p_item->i_type & CONFIG_HINT )
146 /* Add item to long options */
147 p_longopts[i_index].name = strdup( p_item->psz_name );
148 if( p_longopts[i_index].name == NULL ) continue;
149 p_longopts[i_index].has_arg =
150 (p_item->i_type == CONFIG_ITEM_BOOL) ? no_argument :
154 /* It seems that required_argument is broken on Darwin.
155 * Radar ticket #6113829 */
158 p_longopts[i_index].flag = &flag;
159 p_longopts[i_index].val = 0;
162 /* When dealing with bools we also need to add the --no-foo
164 if( p_item->i_type == CONFIG_ITEM_BOOL )
166 char *psz_name = malloc( strlen(p_item->psz_name) + 3 );
167 if( psz_name == NULL ) continue;
168 strcpy( psz_name, "no" );
169 strcat( psz_name, p_item->psz_name );
171 p_longopts[i_index].name = psz_name;
172 p_longopts[i_index].has_arg = no_argument;
173 p_longopts[i_index].flag = &flag;
174 p_longopts[i_index].val = 1;
177 psz_name = malloc( strlen(p_item->psz_name) + 4 );
178 if( psz_name == NULL ) continue;
179 strcpy( psz_name, "no-" );
180 strcat( psz_name, p_item->psz_name );
182 p_longopts[i_index].name = psz_name;
183 p_longopts[i_index].has_arg = no_argument;
184 p_longopts[i_index].flag = &flag;
185 p_longopts[i_index].val = 1;
189 /* If item also has a short option, add it */
190 if( p_item->i_short )
192 pp_shortopts[(int)p_item->i_short] = p_item;
193 psz_shortopts[i_shortopts] = p_item->i_short;
195 if( p_item->i_type != CONFIG_ITEM_BOOL )
197 psz_shortopts[i_shortopts] = ':';
200 if( p_item->i_short == 'v' )
202 psz_shortopts[i_shortopts] = ':';
210 /* We don't need the module list anymore */
211 module_list_free( list );
213 /* Close the longopts and shortopts structures */
214 memset( &p_longopts[i_index], 0, sizeof(struct option) );
215 psz_shortopts[i_shortopts] = '\0';
218 * Parse the command line options
221 optind = 0; /* set to 0 to tell GNU getopt to reinitialize */
222 while( ( i_cmd = getopt_long( *pi_argc, (char **)ppsz_argv, psz_shortopts,
223 p_longopts, &i_index ) ) != -1 )
225 /* A long option has been recognized */
228 module_config_t *p_conf;
229 const char *psz_name = p_longopts[i_index].name;
231 /* Check if we deal with a --nofoo or --no-foo long option */
232 if( flag ) psz_name += psz_name[2] == '-' ? 3 : 2;
234 /* Store the configuration option */
235 p_conf = config_FindConfig( p_this, psz_name );
238 /* Check if the option is deprecated */
239 if( p_conf->b_removed )
242 "Warning: option --%s no longer exists.\n",
247 if( p_conf->psz_oldname
248 && !strcmp( p_conf->psz_oldname, psz_name) )
251 "%s: option --%s is deprecated. Use --%s instead.\n",
252 b_ignore_errors ? "Warning" : "Error",
253 psz_name, p_conf->psz_name );
254 if( !b_ignore_errors )
257 for( i_index = 0; p_longopts[i_index].name; i_index++ )
258 free( (char *)p_longopts[i_index].name );
261 free( psz_shortopts );
265 psz_name = p_conf->psz_name;
268 if( p_conf->i_type != CONFIG_ITEM_BOOL && !optarg )
270 fprintf( stderr, "Warning: missing argument for option --%s\n", p_conf->psz_name );
271 fprintf( stderr, "Try specifying options as '--optionname=value' instead of '--optionname value'\n" );
275 switch( p_conf->i_type )
277 case CONFIG_ITEM_STRING:
278 case CONFIG_ITEM_PASSWORD:
279 case CONFIG_ITEM_FILE:
280 case CONFIG_ITEM_DIRECTORY:
281 case CONFIG_ITEM_MODULE:
282 case CONFIG_ITEM_MODULE_LIST:
283 case CONFIG_ITEM_MODULE_LIST_CAT:
284 case CONFIG_ITEM_MODULE_CAT:
285 var_Create( p_this, psz_name, VLC_VAR_STRING );
286 var_SetString( p_this, psz_name, optarg );
288 case CONFIG_ITEM_INTEGER:
289 var_Create( p_this, psz_name, VLC_VAR_INTEGER );
290 var_SetInteger( p_this, psz_name,
291 strtol(optarg, NULL, 0));
293 case CONFIG_ITEM_FLOAT:
294 var_Create( p_this, psz_name, VLC_VAR_FLOAT );
295 var_SetFloat( p_this, psz_name, us_atof(optarg) );
297 case CONFIG_ITEM_KEY:
298 var_Create( p_this, psz_name, VLC_VAR_INTEGER );
299 var_SetInteger( p_this, psz_name,
300 ConfigStringToKey( optarg ) );
302 case CONFIG_ITEM_BOOL:
303 var_Create( p_this, psz_name, VLC_VAR_BOOL );
304 var_SetBool( p_this, psz_name, !flag );
311 /* A short option has been recognized */
312 if( pp_shortopts[i_cmd] != NULL )
314 const char *name = pp_shortopts[i_cmd]->psz_name;
315 switch( pp_shortopts[i_cmd]->i_type )
317 case CONFIG_ITEM_STRING:
318 case CONFIG_ITEM_PASSWORD:
319 case CONFIG_ITEM_FILE:
320 case CONFIG_ITEM_DIRECTORY:
321 case CONFIG_ITEM_MODULE:
322 case CONFIG_ITEM_MODULE_CAT:
323 case CONFIG_ITEM_MODULE_LIST:
324 case CONFIG_ITEM_MODULE_LIST_CAT:
325 var_Create( p_this, name, VLC_VAR_STRING );
326 var_SetString( p_this, name, optarg );
328 case CONFIG_ITEM_INTEGER:
329 var_Create( p_this, name, VLC_VAR_INTEGER );
334 if( *optarg == 'v' ) /* eg. -vvv */
337 while( *optarg == 'v' )
345 i_verbose += atoi( optarg ); /* eg. -v2 */
350 i_verbose++; /* -v */
352 var_SetInteger( p_this, name, i_verbose );
356 var_SetInteger( p_this, name,
357 strtol(optarg, NULL, 0) );
360 case CONFIG_ITEM_BOOL:
361 var_Create( p_this, name, VLC_VAR_BOOL );
362 var_SetBool( p_this, name, true );
369 /* Internal error: unknown option */
370 if( !b_ignore_errors )
372 fputs( "vlc: unknown option"
373 " or missing mandatory argument ", stderr );
376 fprintf( stderr, "`-%c'\n", optopt );
380 fprintf( stderr, "`%s'\n", ppsz_argv[optind-1] );
382 fputs( "Try `vlc --help' for more information.\n", stderr );
384 for( i_index = 0; p_longopts[i_index].name; i_index++ )
385 free( (char *)p_longopts[i_index].name );
387 free( psz_shortopts );
392 /* Free allocated resources */
393 for( i_index = 0; p_longopts[i_index].name; i_index++ )
394 free( (char *)p_longopts[i_index].name );
396 free( psz_shortopts );