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 MAX_LONGOPT_LENGTH 32
  34
  35 #define ERROR_UNKNOWN_OPTION    0x01
  36 #define ERROR_BAD_ARGUMENT      0x02
  37 #define ERROR_GOT_ARGUMENT      0x03
  38 #define ERROR_MISSING_ARGUMENT  0x04
  39
  40 typedef struct {
  41         int shortopt;
  42         const char *longopt;
  43         const char *argument;
  44         const char *descrition;
  45 } arg_opt_t;
  46
  47
  48 typedef void (*option_callback_fn_t)(int c, const char *arg);
  49
  50
  51 options_t options = {
  52         .crossfade_time = DEFAULT_CROSSFADE_TIME,
  53         .seek_time = 1,
  54 #ifdef ENABLE_LYRICS_SCREEN
  55         .lyrics_timeout = DEFAULT_LYRICS_TIMEOUT,
  56         .lyrics_autosave = false,
  57 #endif
  58         .find_wrap = true,
  59         .scroll_offset = 0,
  60         .wide_cursor = true,
  61         .audible_bell = true,
  62         .bell_on_wrap = true,
  63         .status_message_time = 3,
  64 #ifndef NCMPC_MINI
  65         .scroll = DEFAULT_SCROLL,
  66         .welcome_screen_list = true,
  67         .jump_prefix_only = true,
  68         .second_column = true,
  69 #endif
  70 };
  71
  72 static const arg_opt_t option_table[] = {
  73         { '?', "help", NULL, "Show this help message" },
  74         { 'V', "version", NULL, "Display version information" },
  75         { 'c', "colors", NULL, "Enable colors" },
  76         { 'C', "no-colors", NULL, "Disable colors" },
  77 #ifdef HAVE_GETMOUSE
  78         { 'm', "mouse", NULL, "Enable mouse" },
  79         { 'M', "no-mouse", NULL, "Disable mouse" },
  80 #endif
  81         { 'e', "exit", NULL, "Exit on connection errors" },
  82         { 'p', "port", "PORT", "Connect to server on port" },
  83         { 'h', "host", "HOST", "Connect to server on host" },
  84         { 'P', "password","PASSWORD", "Connect with password" },
  85         { 'f', "config", "FILE", "Read configuration from file" },
  86         { 'k', "key-file","FILE", "Read configuration from file" },
  87         { 'S', "no-splash", NULL, "Don't show the splash screen" },
  88 #ifndef NDEBUG
  89         { 'K', "dump-keys", NULL, "Dump key bindings to stdout" },
  90 #endif
  91 };
  92
  93 static const unsigned option_table_size = sizeof(option_table) / sizeof(option_table[0]);
  94
  95 static const arg_opt_t *
  96 lookup_option(int s, char *l)
  97 {
  98         unsigned i;
  99
 100         for (i = 0; i < option_table_size; ++i) {
 101                 if (l && strcmp(l, option_table[i].longopt) == 0)
 102                         return &option_table[i];;
 103                 if (s && s == option_table[i].shortopt)
 104                         return &option_table[i];;
 105         }
 106
 107         return NULL;
 108 }
 109
 110 static void
 111 option_error(int error, const char *option, const char *arg)
 112 {
 113         switch (error) {
 114         case ERROR_UNKNOWN_OPTION:
 115                 fprintf(stderr, PACKAGE ": invalid option %s\n", option);
 116                 break;
 117         case ERROR_BAD_ARGUMENT:
 118                 fprintf(stderr, PACKAGE ": bad argument: %s\n", option);
 119                 break;
 120         case ERROR_GOT_ARGUMENT:
 121                 fprintf(stderr, PACKAGE ": invalid option %s=%s\n", option, arg);
 122                 break;
 123         case ERROR_MISSING_ARGUMENT:
 124                 fprintf(stderr, PACKAGE ": missing value for %s option\n", option);
 125                 break;
 126         default:
 127                 fprintf(stderr, PACKAGE ": internal error %d\n", error);
 128                 break;
 129         }
 130
 131         exit(EXIT_FAILURE);
 132 }
 133
 134 static void
 135 display_help(void)
 136 {
 137         unsigned i;
 138
 139         printf("Usage: %s [OPTION]...\n", PACKAGE);
 140
 141         for (i = 0; i < option_table_size; ++i) {
 142                 char tmp[MAX_LONGOPT_LENGTH];
 143
 144                 if (option_table[i].argument)
 145                         g_snprintf(tmp, MAX_LONGOPT_LENGTH, "%s=%s",
 146                                    option_table[i].longopt,
 147                                    option_table[i].argument);
 148                 else
 149                         g_strlcpy(tmp, option_table[i].longopt, 64);
 150
 151                 printf("  -%c, --%-20s %s\n",
 152                        option_table[i].shortopt,
 153                        tmp,
 154                        option_table[i].descrition);
 155         }
 156 }
 157
 158 static void
 159 handle_option(int c, const char *arg)
 160 {
 161         switch (c) {
 162         case '?': /* --help */
 163                 display_help();
 164                 exit(EXIT_SUCCESS);
 165         case 'V': /* --version */
 166                 puts(PACKAGE " version: " VERSION "\n"
 167                      "build options:"
 168 #ifdef NCMPC_MINI
 169                      " mini"
 170 #endif
 171 #ifndef NDEBUG
 172                      " debug"
 173 #endif
 174 #ifdef ENABLE_MULTIBYTE
 175                      " multibyte"
 176 #endif
 177 #ifdef ENABLE_WIDE
 178                      " wide"
 179 #endif
 180 #ifdef ENABLE_LOCALE
 181                      " locale"
 182 #endif
 183 #ifdef ENABLE_NLS
 184                      " nls"
 185 #endif
 186 #ifdef ENABLE_COLORS
 187                      " colors"
 188 #else
 189                      " no-colors"
 190 #endif
 191 #ifdef ENABLE_LIRC
 192                      " lirc"
 193 #endif
 194 #ifdef HAVE_GETMOUSE
 195                      " getmouse"
 196 #endif
 197 #ifdef ENABLE_ARTIST_SCREEN
 198                      " artist-screen"
 199 #endif
 200 #ifdef ENABLE_HELP_SCREEN
 201                      " help-screen"
 202 #endif
 203 #ifdef ENABLE_SEARCH_SCREEN
 204                      " search-screen"
 205 #endif
 206 #ifdef ENABLE_SONG_SCREEN
 207                      " song-screen"
 208 #endif
 209 #ifdef ENABLE_KEYDEF_SCREEN
 210                      " key-screen"
 211 #endif
 212 #ifdef ENABLE_LYRICS_SCREEN
 213                      " lyrics-screen"
 214 #endif
 215 #ifdef ENABLE_OUTPUTS_SCREEN
 216                      " outputs-screen"
 217 #endif
 218
 219                      "\n");
 220 #ifndef NCMPC_MINI
 221                 if (strcmp("translator-credits", _("translator-credits")) != 0)
 222                         /* To translators: these credits are shown
 223                            when ncmpc is started with "--version" */
 224                         printf("\n%s\n", _("translator-credits"));
 225 #endif
 226                 exit(EXIT_SUCCESS);
 227         case 'c': /* --colors */
 228 #ifdef ENABLE_COLORS
 229                 options.enable_colors = true;
 230 #endif
 231                 break;
 232         case 'C': /* --no-colors */
 233 #ifdef ENABLE_COLORS
 234                 options.enable_colors = false;
 235 #endif
 236                 break;
 237         case 'm': /* --mouse */
 238 #ifdef HAVE_GETMOUSE
 239                 options.enable_mouse = true;
 240 #endif
 241                 break;
 242         case 'M': /* --no-mouse */
 243 #ifdef HAVE_GETMOUSE
 244                 options.enable_mouse = false;
 245 #endif
 246                 break;
 247         case 'e': /* --exit */
 248                 /* deprecated */
 249                 break;
 250         case 'p': /* --port */
 251                 options.port = atoi(arg);
 252                 break;
 253         case 'h': /* --host */
 254                 g_free(options.host);
 255                 options.host = g_strdup(arg);
 256                 break;
 257         case 'P': /* --password */
 258                 g_free(options.password);
 259                 options.password = locale_to_utf8(arg);
 260                 break;
 261         case 'f': /* --config */
 262                 g_free(options.config_file);
 263                 options.config_file = g_strdup(arg);
 264                 break;
 265         case 'k': /* --key-file */
 266                 g_free(options.key_file);
 267                 options.key_file = g_strdup(arg);
 268                 break;
 269         case 'S': /* --key-file */
 270                 /* the splash screen was removed */
 271                 break;
 272 #ifndef NDEBUG
 273 #ifndef NCMPC_MINI
 274         case 'K': /* --dump-keys */
 275                 read_configuration();
 276                 write_key_bindings(stdout, KEYDEF_WRITE_ALL | KEYDEF_COMMENT_ALL);
 277                 exit(EXIT_SUCCESS);
 278                 break;
 279 #endif
 280 #endif
 281         default:
 282                 fprintf(stderr,"Unknown Option %c = %s\n", c, arg);
 283                 break;
 284         }
 285 }
 286
 287 void
 288 options_parse(int argc, const char *argv[])
 289 {
 290         int i;
 291         const arg_opt_t *opt = NULL;
 292         option_callback_fn_t option_cb = handle_option;
 293
 294         i=1;
 295         while (i < argc) {
 296                 const char *arg = argv[i];
 297                 size_t len = strlen(arg);
 298
 299                 /* check for a long option */
 300                 if (g_str_has_prefix(arg, "--")) {
 301                         char *name, *value;
 302
 303                         /* make sure we got an argument for the previous option */
 304                         if( opt && opt->argument )
 305                                 option_error(ERROR_MISSING_ARGUMENT, opt->longopt, opt->argument);
 306
 307                         /* retrieve a option argument */
 308                         if ((value=g_strrstr(arg+2, "="))) {
 309                                 *value = '\0';
 310                                 name = g_strdup(arg);
 311                                 *value = '=';
 312                                 value++;
 313                         } else
 314                                 name = g_strdup(arg);
 315
 316                         /* check if the option exists */
 317                         if( (opt=lookup_option(0, name+2)) == NULL )
 318                                 option_error(ERROR_UNKNOWN_OPTION, name, NULL);
 319                         g_free(name);
 320
 321                         /* abort if we got an argument to the option and don't want one */
 322                         if( value && opt->argument==NULL )
 323                                 option_error(ERROR_GOT_ARGUMENT, arg, value);
 324
 325                         /* execute option callback */
 326                         if (value || opt->argument==NULL) {
 327                                 option_cb (opt->shortopt, value);
 328                                 opt = NULL;
 329                         }
 330                 }
 331                 /* check for short options */
 332                 else if (len>=2 && g_str_has_prefix(arg, "-")) {
 333                         size_t j;
 334
 335                         for(j=1; j<len; j++) {
 336                                 /* make sure we got an argument for the previous option */
 337                                 if (opt && opt->argument)
 338                                         option_error(ERROR_MISSING_ARGUMENT,
 339                                                      opt->longopt, opt->argument);
 340
 341                                 /* check if the option exists */
 342                                 if ((opt=lookup_option(arg[j], NULL)) == NULL)
 343                                         option_error(ERROR_UNKNOWN_OPTION, arg, NULL);
 344
 345                                 /* if no option argument is needed execute callback */
 346                                 if (opt->argument == NULL) {
 347                                         option_cb (opt->shortopt, NULL);
 348                                         opt = NULL;
 349                                 }
 350                         }
 351                 } else {
 352                         /* is this a option argument? */
 353                         if (opt && opt->argument) {
 354                                 option_cb (opt->shortopt, arg);
 355                                 opt = NULL;
 356                         } else
 357                                 option_error(ERROR_BAD_ARGUMENT, arg, NULL);
 358                 }
 359                 i++;
 360         }
 361
 362         if (opt && opt->argument == NULL)
 363                 option_cb (opt->shortopt, NULL);
 364         else if (opt && opt->argument)
 365                 option_error(ERROR_MISSING_ARGUMENT, opt->longopt, opt->argument);
 366
 367         if (!options.host && getenv("MPD_HOST")) {
 368                 g_free(options.host);
 369                 options.host = g_strdup(getenv("MPD_HOST"));
 370         }
 371 }
 372
 373 void
 374 options_init(void)
 375 {
 376         /* default option values */
 377         options.list_format = g_strdup(DEFAULT_LIST_FORMAT);
 378         options.status_format = g_strdup(DEFAULT_STATUS_FORMAT);
 379         options.screen_list = g_strsplit_set(DEFAULT_SCREEN_LIST, " ", 0);
 380 #ifndef NCMPC_MINI
 381         options.scroll_sep = g_strdup(DEFAULT_SCROLL_SEP);
 382 #endif
 383 }
 384
 385 void
 386 options_deinit(void)
 387 {
 388         g_free(options.host);
 389         g_free(options.username);
 390         g_free(options.password);
 391         g_free(options.config_file);
 392         g_free(options.key_file);
 393         g_free(options.list_format);
 394         g_free(options.status_format);
 395         g_strfreev(options.screen_list);
 396 #ifndef NCMPC_MINI
 397         g_free(options.xterm_title_format);
 398         g_free(options.scroll_sep);
 399 #endif
 400 }