src/options.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2010 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   4
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "options.h"
  21 #include "config.h"
  22 #include "defaults.h"
  23 #include "charset.h"
  24 #include "command.h"
  25 #include "conf.h"
  26 #include "i18n.h"
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <glib.h>
  32
  33 #define ERROR_UNKNOWN_OPTION    0x01
  34 #define ERROR_BAD_ARGUMENT      0x02
  35 #define ERROR_GOT_ARGUMENT      0x03
  36 #define ERROR_MISSING_ARGUMENT  0x04
  37
  38 typedef struct {
  39         int shortopt;
  40         const char *longopt;
  41         const char *argument;
  42         const char *descrition;
  43 } arg_opt_t;
  44
  45
  46 typedef void (*option_callback_fn_t)(int c, const char *arg);
  47
  48
  49 options_t options = {
  50         .crossfade_time = DEFAULT_CROSSFADE_TIME,
  51         .seek_time = 1,
  52 #ifdef ENABLE_LYRICS_SCREEN
  53         .lyrics_timeout = DEFAULT_LYRICS_TIMEOUT,
  54         .lyrics_autosave = false,
  55         .lyrics_show_plugin = false,
  56 #endif
  57         .find_wrap = true,
  58         .scroll_offset = 0,
  59         .wide_cursor = true,
  60         .audible_bell = true,
  61         .bell_on_wrap = true,
  62         .status_message_time = 3,
  63 #ifndef NCMPC_MINI
  64         .scroll = DEFAULT_SCROLL,
  65         .welcome_screen_list = true,
  66         .jump_prefix_only = true,
  67         .second_column = true,
  68 #endif
  69 };
  70
  71 static const arg_opt_t option_table[] = {
  72         { '?', "help", NULL, "Show this help message" },
  73         { 'V', "version", NULL, "Display version information" },
  74         { 'c', "colors", NULL, "Enable colors" },
  75         { 'C', "no-colors", NULL, "Disable colors" },
  76 #ifdef HAVE_GETMOUSE
  77         { 'm', "mouse", NULL, "Enable mouse" },
  78         { 'M', "no-mouse", NULL, "Disable mouse" },
  79 #endif
  80         { 'e', "exit", NULL, "Exit on connection errors" },
  81         { 'p', "port", "PORT", "Connect to server on port" },
  82         { 'h', "host", "HOST", "Connect to server on host" },
  83         { 'P', "password","PASSWORD", "Connect with password" },
  84         { 'f', "config", "FILE", "Read configuration from file" },
  85         { 'k', "key-file","FILE", "Read key bindings from file" },
  86 #ifndef NDEBUG
  87         { 'K', "dump-keys", NULL, "Dump key bindings to stdout" },
  88 #endif
  89 };
  90
  91 static const unsigned option_table_size = sizeof(option_table) / sizeof(option_table[0]);
  92
  93 static const arg_opt_t *
  94 lookup_option(int s, char *l)
  95 {
  96         unsigned i;
  97
  98         for (i = 0; i < option_table_size; ++i) {
  99                 if (l && strcmp(l, option_table[i].longopt) == 0)
 100                         return &option_table[i];;
 101                 if (s && s == option_table[i].shortopt)
 102                         return &option_table[i];;
 103         }
 104
 105         return NULL;
 106 }
 107
 108 static void
 109 option_error(int error, const char *option, const char *arg)
 110 {
 111         switch (error) {
 112         case ERROR_UNKNOWN_OPTION:
 113                 fprintf(stderr, PACKAGE ": invalid option %s\n", option);
 114                 break;
 115         case ERROR_BAD_ARGUMENT:
 116                 fprintf(stderr, PACKAGE ": bad argument: %s\n", option);
 117                 break;
 118         case ERROR_GOT_ARGUMENT:
 119                 fprintf(stderr, PACKAGE ": invalid option %s=%s\n", option, arg);
 120                 break;
 121         case ERROR_MISSING_ARGUMENT:
 122                 fprintf(stderr, PACKAGE ": missing value for %s option\n", option);
 123                 break;
 124         default:
 125                 fprintf(stderr, PACKAGE ": internal error %d\n", error);
 126                 break;
 127         }
 128
 129         exit(EXIT_FAILURE);
 130 }
 131
 132 static void
 133 display_help(void)
 134 {
 135         unsigned i;
 136
 137         printf("Usage: %s [OPTION]...\n", PACKAGE);
 138
 139         for (i = 0; i < option_table_size; ++i) {
 140                 char tmp[32];
 141
 142                 if (option_table[i].argument)
 143                         g_snprintf(tmp, sizeof(tmp), "%s=%s",
 144                                    option_table[i].longopt,
 145                                    option_table[i].argument);
 146                 else
 147                         g_strlcpy(tmp, option_table[i].longopt, 64);
 148
 149                 printf("  -%c, --%-20s %s\n",
 150                        option_table[i].shortopt,
 151                        tmp,
 152                        option_table[i].descrition);
 153         }
 154 }
 155
 156 static void
 157 handle_option(int c, const char *arg)
 158 {
 159         switch (c) {
 160         case '?': /* --help */
 161                 display_help();
 162                 exit(EXIT_SUCCESS);
 163         case 'V': /* --version */
 164                 puts(PACKAGE " version: " VERSION "\n"
 165                      "build options:"
 166 #ifdef NCMPC_MINI
 167                      " mini"
 168 #endif
 169 #ifndef NDEBUG
 170                      " debug"
 171 #endif
 172 #ifdef ENABLE_MULTIBYTE
 173                      " multibyte"
 174 #endif
 175 #ifdef ENABLE_WIDE
 176                      " wide"
 177 #endif
 178 #ifdef ENABLE_LOCALE
 179                      " locale"
 180 #endif
 181 #ifdef ENABLE_NLS
 182                      " nls"
 183 #endif
 184 #ifdef ENABLE_COLORS
 185                      " colors"
 186 #else
 187                      " no-colors"
 188 #endif
 189 #ifdef ENABLE_LIRC
 190                      " lirc"
 191 #endif
 192 #ifdef HAVE_GETMOUSE
 193                      " getmouse"
 194 #endif
 195 #ifdef ENABLE_ARTIST_SCREEN
 196                      " artist-screen"
 197 #endif
 198 #ifdef ENABLE_HELP_SCREEN
 199                      " help-screen"
 200 #endif
 201 #ifdef ENABLE_SEARCH_SCREEN
 202                      " search-screen"
 203 #endif
 204 #ifdef ENABLE_SONG_SCREEN
 205                      " song-screen"
 206 #endif
 207 #ifdef ENABLE_KEYDEF_SCREEN
 208                      " key-screen"
 209 #endif
 210 #ifdef ENABLE_LYRICS_SCREEN
 211                      " lyrics-screen"
 212 #endif
 213 #ifdef ENABLE_OUTPUTS_SCREEN
 214                      " outputs-screen"
 215 #endif
 216
 217                      "\n");
 218 #ifndef NCMPC_MINI
 219                 if (strcmp("translator-credits", _("translator-credits")) != 0)
 220                         /* To translators: these credits are shown
 221                            when ncmpc is started with "--version" */
 222                         printf("\n%s\n", _("translator-credits"));
 223 #endif
 224                 exit(EXIT_SUCCESS);
 225         case 'c': /* --colors */
 226 #ifdef ENABLE_COLORS
 227                 options.enable_colors = true;
 228 #endif
 229                 break;
 230         case 'C': /* --no-colors */
 231 #ifdef ENABLE_COLORS
 232                 options.enable_colors = false;
 233 #endif
 234                 break;
 235         case 'm': /* --mouse */
 236 #ifdef HAVE_GETMOUSE
 237                 options.enable_mouse = true;
 238 #endif
 239                 break;
 240         case 'M': /* --no-mouse */
 241 #ifdef HAVE_GETMOUSE
 242                 options.enable_mouse = false;
 243 #endif
 244                 break;
 245         case 'e': /* --exit */
 246                 /* deprecated */
 247                 break;
 248         case 'p': /* --port */
 249                 options.port = atoi(arg);
 250                 break;
 251         case 'h': /* --host */
 252                 g_free(options.host);
 253                 options.host = g_strdup(arg);
 254                 break;
 255         case 'P': /* --password */
 256                 g_free(options.password);
 257                 options.password = locale_to_utf8(arg);
 258                 break;
 259         case 'f': /* --config */
 260                 g_free(options.config_file);
 261                 options.config_file = g_strdup(arg);
 262                 break;
 263         case 'k': /* --key-file */
 264                 g_free(options.key_file);
 265                 options.key_file = g_strdup(arg);
 266                 break;
 267 #ifndef NDEBUG
 268 #ifndef NCMPC_MINI
 269         case 'K': /* --dump-keys */
 270                 read_configuration();
 271                 write_key_bindings(stdout, KEYDEF_WRITE_ALL | KEYDEF_COMMENT_ALL);
 272                 exit(EXIT_SUCCESS);
 273                 break;
 274 #endif
 275 #endif
 276         default:
 277                 fprintf(stderr,"Unknown Option %c = %s\n", c, arg);
 278                 break;
 279         }
 280 }
 281
 282 void
 283 options_parse(int argc, const char *argv[])
 284 {
 285         int i;
 286         const arg_opt_t *opt = NULL;
 287         option_callback_fn_t option_cb = handle_option;
 288
 289         for (i = 1; i < argc; i++) {
 290                 const char *arg = argv[i];
 291                 size_t len = strlen(arg);
 292
 293                 /* check for a long option */
 294                 if (g_str_has_prefix(arg, "--")) {
 295                         char *name, *value;
 296
 297                         /* make sure we got an argument for the previous option */
 298                         if( opt && opt->argument )
 299                                 option_error(ERROR_MISSING_ARGUMENT, opt->longopt, opt->argument);
 300
 301                         /* retrieve a option argument */
 302                         if ((value=g_strrstr(arg+2, "="))) {
 303                                 *value = '\0';
 304                                 name = g_strdup(arg);
 305                                 *value = '=';
 306                                 value++;
 307                         } else
 308                                 name = g_strdup(arg);
 309
 310                         /* check if the option exists */
 311                         if( (opt=lookup_option(0, name+2)) == NULL )
 312                                 option_error(ERROR_UNKNOWN_OPTION, name, NULL);
 313                         g_free(name);
 314
 315                         /* abort if we got an argument to the option and don't want one */
 316                         if( value && opt->argument==NULL )
 317                                 option_error(ERROR_GOT_ARGUMENT, arg, value);
 318
 319                         /* execute option callback */
 320                         if (value || opt->argument==NULL) {
 321                                 option_cb (opt->shortopt, value);
 322                                 opt = NULL;
 323                         }
 324                 }
 325                 /* check for short options */
 326                 else if (len>=2 && g_str_has_prefix(arg, "-")) {
 327                         size_t j;
 328
 329                         for(j=1; j<len; j++) {
 330                                 /* make sure we got an argument for the previous option */
 331                                 if (opt && opt->argument)
 332                                         option_error(ERROR_MISSING_ARGUMENT,
 333                                                      opt->longopt, opt->argument);
 334
 335                                 /* check if the option exists */
 336                                 if ((opt=lookup_option(arg[j], NULL)) == NULL)
 337                                         option_error(ERROR_UNKNOWN_OPTION, arg, NULL);
 338
 339                                 /* if no option argument is needed execute callback */
 340                                 if (opt->argument == NULL) {
 341                                         option_cb (opt->shortopt, NULL);
 342                                         opt = NULL;
 343                                 }
 344                         }
 345                 } else {
 346                         /* is this a option argument? */
 347                         if (opt && opt->argument) {
 348                                 option_cb (opt->shortopt, arg);
 349                                 opt = NULL;
 350                         } else
 351                                 option_error(ERROR_BAD_ARGUMENT, arg, NULL);
 352                 }
 353         }
 354
 355         if (opt && opt->argument == NULL)
 356                 option_cb (opt->shortopt, NULL);
 357         else if (opt && opt->argument)
 358                 option_error(ERROR_MISSING_ARGUMENT, opt->longopt, opt->argument);
 359
 360         if (!options.host && getenv("MPD_HOST")) {
 361                 g_free(options.host);
 362                 options.host = g_strdup(getenv("MPD_HOST"));
 363         }
 364 }
 365
 366 void
 367 options_init(void)
 368 {
 369         /* default option values */
 370         options.list_format = g_strdup(DEFAULT_LIST_FORMAT);
 371         options.status_format = g_strdup(DEFAULT_STATUS_FORMAT);
 372         options.screen_list = g_strsplit_set(DEFAULT_SCREEN_LIST, " ", 0);
 373 #ifndef NCMPC_MINI
 374         options.scroll_sep = g_strdup(DEFAULT_SCROLL_SEP);
 375 #endif
 376 }
 377
 378 void
 379 options_deinit(void)
 380 {
 381         g_free(options.host);
 382         g_free(options.username);
 383         g_free(options.password);
 384         g_free(options.config_file);
 385         g_free(options.key_file);
 386         g_free(options.list_format);
 387         g_free(options.status_format);
 388         g_strfreev(options.screen_list);
 389 #ifndef NCMPC_MINI
 390         g_free(options.xterm_title_format);
 391         g_free(options.scroll_sep);
 392 #endif
 393 }