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         .bell_on_wrap = true,
  62         .status_message_time = 3,
  63 #ifndef NCMPC_MINI
  64         .scroll = DEFAULT_SCROLL,
  65         .welcome_screen_list = true,
  66         .display_time = true,
  67 #endif
  68 };
  69
  70 static const arg_opt_t option_table[] = {
  71         { '?', "help", NULL, "Show this help message" },
  72         { 'V', "version", NULL, "Display version information" },
  73         { 'c', "colors", NULL, "Enable colors" },
  74         { 'C', "no-colors", NULL, "Disable colors" },
  75 #ifdef HAVE_GETMOUSE
  76         { 'm', "mouse", NULL, "Enable mouse" },
  77         { 'M', "no-mouse", NULL, "Disable mouse" },
  78 #endif
  79         { 'e', "exit", NULL, "Exit on connection errors" },
  80         { 'p', "port", "PORT", "Connect to server on port [" DEFAULT_PORT_STR "]" },
  81         { 'h', "host", "HOST", "Connect to server on host [" DEFAULT_HOST "]" },
  82         { 'P', "password","PASSWORD", "Connect with password" },
  83         { 'f', "config", "FILE", "Read configuration from file" },
  84         { 'k', "key-file","FILE", "Read configuration from file" },
  85         { 'S', "no-splash", NULL, "Don't show the splash screen" },
  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[MAX_LONGOPT_LENGTH];
 141
 142                 if (option_table[i].argument)
 143                         g_snprintf(tmp, MAX_LONGOPT_LENGTH, "%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                 i++;
 154         }
 155 }
 156
 157 static void
 158 handle_option(int c, const char *arg)
 159 {
 160         switch (c) {
 161         case '?': /* --help */
 162                 display_help();
 163                 exit(EXIT_SUCCESS);
 164         case 'V': /* --version */
 165                 puts(PACKAGE " version: " VERSION "\n"
 166                      "build options:"
 167 #ifdef NCMPC_MINI
 168                      " mini"
 169 #endif
 170 #ifndef NDEBUG
 171                      " debug"
 172 #endif
 173 #ifdef ENABLE_MULTIBYTE
 174                      " multibyte"
 175 #endif
 176 #ifdef ENABLE_WIDE
 177                      " wide"
 178 #endif
 179 #ifdef ENABLE_LOCALE
 180                      " locale"
 181 #endif
 182 #ifdef ENABLE_NLS
 183                      " nls"
 184 #endif
 185 #ifdef ENABLE_COLORS
 186                      " colors"
 187 #else
 188                      " no-colors"
 189 #endif
 190 #ifdef ENABLE_LIRC
 191                      " lirc"
 192 #endif
 193 #ifdef HAVE_GETMOUSE
 194                      " getmouse"
 195 #endif
 196 #ifdef ENABLE_ARTIST_SCREEN
 197                      " artist-screen"
 198 #endif
 199 #ifdef ENABLE_HELP_SCREEN
 200                      " help-screen"
 201 #endif
 202 #ifdef ENABLE_SEARCH_SCREEN
 203                      " search-screen"
 204 #endif
 205 #ifdef ENABLE_SONG_SCREEN
 206                      " song-screen"
 207 #endif
 208 #ifdef ENABLE_KEYDEF_SCREEN
 209                      " key-screen"
 210 #endif
 211 #ifdef ENABLE_LYRICS_SCREEN
 212                      " lyrics-screen"
 213 #endif
 214 #ifdef ENABLE_OUTPUTS_SCREEN
 215                      " outputs-screen"
 216 #endif
 217
 218                      "\n");
 219 #ifndef NCMPC_MINI
 220                 if (strcmp("translator-credits", _("translator-credits")) != 0)
 221                         /* To translators: these credits are shown
 222                            when ncmpc is started with "--version" */
 223                         printf("\n%s\n", _("translator-credits"));
 224 #endif
 225                 exit(EXIT_SUCCESS);
 226         case 'c': /* --colors */
 227 #ifdef ENABLE_COLORS
 228                 options.enable_colors = true;
 229 #endif
 230                 break;
 231         case 'C': /* --no-colors */
 232 #ifdef ENABLE_COLORS
 233                 options.enable_colors = false;
 234 #endif
 235                 break;
 236         case 'm': /* --mouse */
 237 #ifdef HAVE_GETMOUSE
 238                 options.enable_mouse = true;
 239 #endif
 240                 break;
 241         case 'M': /* --no-mouse */
 242 #ifdef HAVE_GETMOUSE
 243                 options.enable_mouse = false;
 244 #endif
 245                 break;
 246         case 'e': /* --exit */
 247                 /* deprecated */
 248                 break;
 249         case 'p': /* --port */
 250                 options.port = atoi(arg);
 251                 break;
 252         case 'h': /* --host */
 253                 if( options.host )
 254                         g_free(options.host);
 255                 options.host = g_strdup(arg);
 256                 break;
 257         case 'P': /* --password */
 258                 if( options.password )
 259                         g_free(options.password);
 260                 options.password = locale_to_utf8(arg);
 261                 break;
 262         case 'f': /* --config */
 263                 if( options.config_file )
 264                         g_free(options.config_file);
 265                 options.config_file = g_strdup(arg);
 266                 break;
 267         case 'k': /* --key-file */
 268                 if( options.key_file )
 269                         g_free(options.key_file);
 270                 options.key_file = g_strdup(arg);
 271                 break;
 272         case 'S': /* --key-file */
 273                 /* the splash screen was removed */
 274                 break;
 275 #ifndef NDEBUG
 276         case 'K': /* --dump-keys */
 277                 read_configuration();
 278                 write_key_bindings(stdout, KEYDEF_WRITE_ALL | KEYDEF_COMMENT_ALL);
 279                 exit(EXIT_SUCCESS);
 280                 break;
 281 #endif
 282         default:
 283                 fprintf(stderr,"Unknown Option %c = %s\n", c, arg);
 284                 break;
 285         }
 286 }
 287
 288 void
 289 options_parse(int argc, const char *argv[])
 290 {
 291         int i;
 292         const arg_opt_t *opt = NULL;
 293         option_callback_fn_t option_cb = handle_option;
 294
 295         i=1;
 296         while (i < argc) {
 297                 const char *arg = argv[i];
 298                 size_t len = strlen(arg);
 299
 300                 /* check for a long option */
 301                 if (g_str_has_prefix(arg, "--")) {
 302                         char *name, *value;
 303
 304                         /* make sure we got an argument for the previous option */
 305                         if( opt && opt->argument )
 306                                 option_error(ERROR_MISSING_ARGUMENT, opt->longopt, opt->argument);
 307
 308                         /* retrieve a option argument */
 309                         if ((value=g_strrstr(arg+2, "="))) {
 310                                 *value = '\0';
 311                                 name = g_strdup(arg);
 312                                 *value = '=';
 313                                 value++;
 314                         } else
 315                                 name = g_strdup(arg);
 316
 317                         /* check if the option exists */
 318                         if( (opt=lookup_option(0, name+2)) == NULL )
 319                                 option_error(ERROR_UNKNOWN_OPTION, name, NULL);
 320                         g_free(name);
 321
 322                         /* abort if we got an argument to the option and don't want one */
 323                         if( value && opt->argument==NULL )
 324                                 option_error(ERROR_GOT_ARGUMENT, arg, value);
 325
 326                         /* execute option callback */
 327                         if (value || opt->argument==NULL) {
 328                                 option_cb (opt->shortopt, value);
 329                                 opt = NULL;
 330                         }
 331                 }
 332                 /* check for short options */
 333                 else if (len>=2 && g_str_has_prefix(arg, "-")) {
 334                         size_t j;
 335
 336                         for(j=1; j<len; j++) {
 337                                 /* make sure we got an argument for the previous option */
 338                                 if (opt && opt->argument)
 339                                         option_error(ERROR_MISSING_ARGUMENT,
 340                                                      opt->longopt, opt->argument);
 341
 342                                 /* check if the option exists */
 343                                 if ((opt=lookup_option(arg[j], NULL)) == NULL)
 344                                         option_error(ERROR_UNKNOWN_OPTION, arg, NULL);
 345
 346                                 /* if no option argument is needed execute callback */
 347                                 if (opt->argument == NULL) {
 348                                         option_cb (opt->shortopt, NULL);
 349                                         opt = NULL;
 350                                 }
 351                         }
 352                 } else {
 353                         /* is this a option argument? */
 354                         if (opt && opt->argument) {
 355                                 option_cb (opt->shortopt, arg);
 356                                 opt = NULL;
 357                         } else
 358                                 option_error(ERROR_BAD_ARGUMENT, arg, NULL);
 359                 }
 360                 i++;
 361         }
 362
 363         if (opt && opt->argument == NULL)
 364                 option_cb (opt->shortopt, NULL);
 365         else if (opt && opt->argument)
 366                 option_error(ERROR_MISSING_ARGUMENT, opt->longopt, opt->argument);
 367 }
 368
 369 void
 370 options_init(void)
 371 {
 372         const char *value;
 373         char *tmp;
 374
 375         /* get initial values for host and password from MPD_HOST (environment) */
 376         if ((value = g_getenv(MPD_HOST_ENV)))
 377                 options.host = g_strdup(value);
 378         else
 379                 options.host = g_strdup(DEFAULT_HOST);
 380
 381         if ((tmp = g_strstr_len(options.host, strlen(options.host), "@"))) {
 382                 char *oldhost = options.host;
 383                 *tmp  = '\0';
 384                 options.password = locale_to_utf8(oldhost);
 385                 options.host = g_strdup(tmp+1);
 386                 g_free(oldhost);
 387         }
 388
 389         /* get initial values for port from MPD_PORT (environment) */
 390         if ((value = g_getenv(MPD_PORT_ENV)))
 391                 options.port = atoi(value);
 392
 393         /* default option values */
 394         options.list_format = g_strdup(DEFAULT_LIST_FORMAT);
 395         options.status_format = g_strdup(DEFAULT_STATUS_FORMAT);
 396         options.screen_list = g_strsplit_set(DEFAULT_SCREEN_LIST, " ", 0);
 397         options.timedisplay_type = g_strdup(DEFAULT_TIMEDISPLAY_TYPE);
 398 #ifndef NCMPC_MINI
 399         options.scroll_sep = g_strdup(DEFAULT_SCROLL_SEP);
 400 #endif
 401 }