src/options.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 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         .port = DEFAULT_PORT,
  53         .crossfade_time = DEFAULT_CROSSFADE_TIME,
  54         .seek_time = 1,
  55 #ifdef ENABLE_LYRICS_SCREEN
  56         .lyrics_timeout = DEFAULT_LYRICS_TIMEOUT,
  57 #endif
  58         .find_wrap = true,
  59         .wide_cursor = true,
  60         .audible_bell = true,
  61 #ifndef NCMPC_MINI
  62         .scroll = DEFAULT_SCROLL,
  63         .welcome_screen_list = true,
  64         .display_time = true,
  65 #endif
  66 };
  67
  68 static const arg_opt_t option_table[] = {
  69         { '?', "help", NULL, "Show this help message" },
  70         { 'V', "version", NULL, "Display version information" },
  71         { 'c', "colors", NULL, "Enable colors" },
  72         { 'C', "no-colors", NULL, "Disable colors" },
  73 #ifdef HAVE_GETMOUSE
  74         { 'm', "mouse", NULL, "Enable mouse" },
  75         { 'M', "no-mouse", NULL, "Disable mouse" },
  76 #endif
  77         { 'e', "exit", NULL, "Exit on connection errors" },
  78         { 'p', "port", "PORT", "Connect to server on port [" DEFAULT_PORT_STR "]" },
  79         { 'h', "host", "HOST", "Connect to server on host [" DEFAULT_HOST "]" },
  80         { 'P', "password","PASSWORD", "Connect with password" },
  81         { 'f', "config", "FILE", "Read configuration from file" },
  82         { 'k', "key-file","FILE", "Read configuration from file" },
  83         { 'S', "no-splash", NULL, "Don't show the splash screen" },
  84 #ifndef NDEBUG
  85         { 'K', "dump-keys", NULL, "Dump key bindings to stdout" },
  86 #endif
  87 };
  88
  89 static const unsigned option_table_size = sizeof(option_table) / sizeof(option_table[0]);
  90
  91 static const arg_opt_t *
  92 lookup_option(int s, char *l)
  93 {
  94         unsigned i;
  95
  96         for (i = 0; i < option_table_size; ++i) {
  97                 if (l && strcmp(l, option_table[i].longopt) == 0)
  98                         return &option_table[i];;
  99                 if (s && s == option_table[i].shortopt)
 100                         return &option_table[i];;
 101         }
 102
 103         return NULL;
 104 }
 105
 106 static void
 107 option_error(int error, const char *option, const char *arg)
 108 {
 109         switch (error) {
 110         case ERROR_UNKNOWN_OPTION:
 111                 fprintf(stderr, PACKAGE ": invalid option %s\n", option);
 112                 break;
 113         case ERROR_BAD_ARGUMENT:
 114                 fprintf(stderr, PACKAGE ": bad argument: %s\n", option);
 115                 break;
 116         case ERROR_GOT_ARGUMENT:
 117                 fprintf(stderr, PACKAGE ": invalid option %s=%s\n", option, arg);
 118                 break;
 119         case ERROR_MISSING_ARGUMENT:
 120                 fprintf(stderr, PACKAGE ": missing value for %s option\n", option);
 121                 break;
 122         default:
 123                 fprintf(stderr, PACKAGE ": internal error %d\n", error);
 124                 break;
 125         }
 126
 127         exit(EXIT_FAILURE);
 128 }
 129
 130 static void
 131 display_help(void)
 132 {
 133         unsigned i;
 134
 135         printf("Usage: %s [OPTION]...\n", PACKAGE);
 136
 137         for (i = 0; i < option_table_size; ++i) {
 138                 char tmp[MAX_LONGOPT_LENGTH];
 139
 140                 if (option_table[i].argument)
 141                         g_snprintf(tmp, MAX_LONGOPT_LENGTH, "%s=%s",
 142                                    option_table[i].longopt,
 143                                    option_table[i].argument);
 144                 else
 145                         g_strlcpy(tmp, option_table[i].longopt, 64);
 146
 147                 printf("  -%c, --%-20s %s\n",
 148                        option_table[i].shortopt,
 149                        tmp,
 150                        option_table[i].descrition);
 151                 i++;
 152         }
 153 }
 154
 155 static void
 156 handle_option(int c, const char *arg)
 157 {
 158         switch (c) {
 159         case '?': /* --help */
 160                 display_help();
 161                 exit(EXIT_SUCCESS);
 162         case 'V': /* --version */
 163                 puts(PACKAGE " version: " VERSION "\n"
 164                      "build options:"
 165 #ifdef NCMPC_MINI
 166                      " mini"
 167 #endif
 168 #ifndef NDEBUG
 169                      " debug"
 170 #endif
 171 #ifdef ENABLE_MULTIBYTE
 172                      " multibyte"
 173 #endif
 174 #ifdef ENABLE_WIDE
 175                      " wide"
 176 #endif
 177 #ifdef ENABLE_LOCALE
 178                      " locale"
 179 #endif
 180 #ifdef ENABLE_NLS
 181                      " nls"
 182 #endif
 183 #ifdef ENABLE_COLORS
 184                      " colors"
 185 #else
 186                      " no-colors"
 187 #endif
 188 #ifdef ENABLE_LIRC
 189                      " lirc"
 190 #endif
 191 #ifdef HAVE_GETMOUSE
 192                      " getmouse"
 193 #endif
 194 #ifdef ENABLE_ARTIST_SCREEN
 195                      " artist-screen"
 196 #endif
 197 #ifdef ENABLE_HELP_SCREEN
 198                      " help-screen"
 199 #endif
 200 #ifdef ENABLE_SEARCH_SCREEN
 201                      " search-screen"
 202 #endif
 203 #ifdef ENABLE_SONG_SCREEN
 204                      " song-screen"
 205 #endif
 206 #ifdef ENABLE_KEYDEF_SCREEN
 207                      " key-screen"
 208 #endif
 209 #ifdef ENABLE_LYRICS_SCREEN
 210                      " lyrics-screen"
 211 #endif
 212 #ifdef ENABLE_OUTPUTS_SCREEN
 213                      " outputs-screen"
 214 #endif
 215
 216                      "\n");
 217 #ifndef NCMPC_MINI
 218                 if (strcmp("translator-credits", _("translator-credits")) != 0)
 219                         /* To translators: these credits are shown
 220                            when ncmpc is started with "--version" */
 221                         printf("\n%s\n", _("translator-credits"));
 222 #endif
 223                 exit(EXIT_SUCCESS);
 224         case 'c': /* --colors */
 225 #ifdef ENABLE_COLORS
 226                 options.enable_colors = true;
 227 #endif
 228                 break;
 229         case 'C': /* --no-colors */
 230 #ifdef ENABLE_COLORS
 231                 options.enable_colors = false;
 232 #endif
 233                 break;
 234         case 'm': /* --mouse */
 235 #ifdef HAVE_GETMOUSE
 236                 options.enable_mouse = true;
 237 #endif
 238                 break;
 239         case 'M': /* --no-mouse */
 240 #ifdef HAVE_GETMOUSE
 241                 options.enable_mouse = false;
 242 #endif
 243                 break;
 244         case 'e': /* --exit */
 245                 /* deprecated */
 246                 break;
 247         case 'p': /* --port */
 248                 options.port = atoi(arg);
 249                 break;
 250         case 'h': /* --host */
 251                 if( options.host )
 252                         g_free(options.host);
 253                 options.host = g_strdup(arg);
 254                 break;
 255         case 'P': /* --password */
 256                 if( options.password )
 257                         g_free(options.password);
 258                 options.password = locale_to_utf8(arg);
 259                 break;
 260         case 'f': /* --config */
 261                 if( options.config_file )
 262                         g_free(options.config_file);
 263                 options.config_file = g_strdup(arg);
 264                 break;
 265         case 'k': /* --key-file */
 266                 if( options.key_file )
 267                         g_free(options.key_file);
 268                 options.key_file = g_strdup(arg);
 269                 break;
 270         case 'S': /* --key-file */
 271                 /* the splash screen was removed */
 272                 break;
 273 #ifndef NDEBUG
 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         default:
 281                 fprintf(stderr,"Unknown Option %c = %s\n", c, arg);
 282                 break;
 283         }
 284 }
 285
 286 void
 287 options_parse(int argc, const char *argv[])
 288 {
 289         int i;
 290         const arg_opt_t *opt = NULL;
 291         option_callback_fn_t option_cb = handle_option;
 292
 293         i=1;
 294         while (i < argc) {
 295                 const char *arg = argv[i];
 296                 size_t len = strlen(arg);
 297
 298                 /* check for a long option */
 299                 if (g_str_has_prefix(arg, "--")) {
 300                         char *name, *value;
 301
 302                         /* make shure we got an argument for the previous option */
 303                         if( opt && opt->argument )
 304                                 option_error(ERROR_MISSING_ARGUMENT, opt->longopt, opt->argument);
 305
 306                         /* retreive a option argument */
 307                         if ((value=g_strrstr(arg+2, "="))) {
 308                                 *value = '\0';
 309                                 name = g_strdup(arg);
 310                                 *value = '=';
 311                                 value++;
 312                         } else
 313                                 name = g_strdup(arg);
 314
 315                         /* check if the option exists */
 316                         if( (opt=lookup_option(0, name+2)) == NULL )
 317                                 option_error(ERROR_UNKNOWN_OPTION, name, NULL);
 318                         g_free(name);
 319
 320                         /* abort if we got an argument to the option and dont want one */
 321                         if( value && opt->argument==NULL )
 322                                 option_error(ERROR_GOT_ARGUMENT, arg, value);
 323
 324                         /* execute option callback */
 325                         if (value || opt->argument==NULL) {
 326                                 option_cb (opt->shortopt, value);
 327                                 opt = NULL;
 328                         }
 329                 }
 330                 /* check for short options */
 331                 else if (len>=2 && g_str_has_prefix(arg, "-")) {
 332                         size_t j;
 333
 334                         for(j=1; j<len; j++) {
 335                                 /* make shure we got an argument for the previous option */
 336                                 if (opt && opt->argument)
 337                                         option_error(ERROR_MISSING_ARGUMENT,
 338                                                      opt->longopt, opt->argument);
 339
 340                                 /* check if the option exists */
 341                                 if ((opt=lookup_option(arg[j], NULL)) == NULL)
 342                                         option_error(ERROR_UNKNOWN_OPTION, arg, NULL);
 343
 344                                 /* if no option argument is needed execute callback */
 345                                 if (opt->argument == NULL) {
 346                                         option_cb (opt->shortopt, NULL);
 347                                         opt = NULL;
 348                                 }
 349                         }
 350                 } else {
 351                         /* is this a option argument? */
 352                         if (opt && opt->argument) {
 353                                 option_cb (opt->shortopt, arg);
 354                                 opt = NULL;
 355                         } else
 356                                 option_error(ERROR_BAD_ARGUMENT, arg, NULL);
 357                 }
 358                 i++;
 359         }
 360
 361         if (opt && opt->argument == NULL)
 362                 option_cb (opt->shortopt, NULL);
 363         else if (opt && opt->argument)
 364                 option_error(ERROR_MISSING_ARGUMENT, opt->longopt, opt->argument);
 365 }
 366
 367 void
 368 options_init(void)
 369 {
 370         const char *value;
 371         char *tmp;
 372
 373         /* get initial values for host and password from MPD_HOST (enviroment) */
 374         if ((value = g_getenv(MPD_HOST_ENV)))
 375                 options.host = g_strdup(value);
 376         else
 377                 options.host = g_strdup(DEFAULT_HOST);
 378
 379         if ((tmp = g_strstr_len(options.host, strlen(options.host), "@"))) {
 380                 char *oldhost = options.host;
 381                 *tmp  = '\0';
 382                 options.password = locale_to_utf8(oldhost);
 383                 options.host = g_strdup(tmp+1);
 384                 g_free(oldhost);
 385         }
 386
 387         /* get initial values for port from MPD_PORT (enviroment) */
 388         if ((value = g_getenv(MPD_PORT_ENV)))
 389                 options.port = atoi(value);
 390
 391         /* default option values */
 392         options.list_format = g_strdup(DEFAULT_LIST_FORMAT);
 393         options.status_format = g_strdup(DEFAULT_STATUS_FORMAT);
 394         options.screen_list = g_strsplit_set(DEFAULT_SCREEN_LIST, " ", 0);
 395         options.timedisplay_type = g_strdup(DEFAULT_TIMEDISPLAY_TYPE);
 396 #ifndef NCMPC_MINI
 397         options.scroll_sep = g_strdup(DEFAULT_SCROLL_SEP);
 398 #endif
 399 }