src/main.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 "config.h"
  21 #include "ncmpc.h"
  22 #include "mpdclient.h"
  23 #include "gidle.h"
  24 #include "charset.h"
  25 #include "options.h"
  26 #include "command.h"
  27 #include "ncu.h"
  28 #include "screen.h"
  29 #include "screen_utils.h"
  30 #include "screen_status.h"
  31 #include "strfsong.h"
  32 #include "i18n.h"
  33 #include "player_command.h"
  34
  35 #ifndef NCMPC_MINI
  36 #include "conf.h"
  37 #endif
  38
  39 #ifdef ENABLE_LYRICS_SCREEN
  40 #include "lyrics.h"
  41 #endif
  42
  43 #ifdef ENABLE_LIRC
  44 #include "lirc.h"
  45 #endif
  46
  47 #include <mpd/client.h>
  48
  49 #include <stdlib.h>
  50 #include <unistd.h>
  51 #include <fcntl.h>
  52 #include <signal.h>
  53 #include <string.h>
  54
  55 #ifdef ENABLE_LOCALE
  56 #include <locale.h>
  57 #endif
  58
  59 /* time between mpd updates [ms] */
  60 static const guint update_interval = 500;
  61
  62 #define BUFSIZE 1024
  63
  64 static struct mpdclient *mpd = NULL;
  65 static GMainLoop *main_loop;
  66 static guint reconnect_source_id, update_source_id;
  67 static int sigwinch_pipes[2];
  68
  69 #ifndef NCMPC_MINI
  70 static guint check_key_bindings_source_id;
  71 #endif
  72
  73 #ifndef NCMPC_MINI
  74 static void
  75 update_xterm_title(void)
  76 {
  77         static char title[BUFSIZE];
  78         char tmp[BUFSIZE];
  79         struct mpd_status *status = NULL;
  80         const struct mpd_song *song = NULL;
  81
  82         if (mpd) {
  83                 status = mpd->status;
  84                 song = mpd->song;
  85         }
  86
  87         if (options.xterm_title_format && status && song &&
  88             mpd_status_get_state(status) == MPD_STATE_PLAY)
  89                 strfsong(tmp, BUFSIZE, options.xterm_title_format, song);
  90         else
  91                 g_strlcpy(tmp, PACKAGE " version " VERSION, BUFSIZE);
  92
  93         if (strncmp(title, tmp, BUFSIZE)) {
  94                 g_strlcpy(title, tmp, BUFSIZE);
  95                 set_xterm_title("%s", title);
  96         }
  97 }
  98 #endif
  99
 100 static void
 101 exit_and_cleanup(void)
 102 {
 103         screen_exit();
 104 #ifndef NCMPC_MINI
 105         set_xterm_title("");
 106 #endif
 107         printf("\n");
 108
 109         if (mpd) {
 110                 mpdclient_disconnect(mpd);
 111                 mpdclient_free(mpd);
 112         }
 113 }
 114
 115 #ifndef WIN32
 116 static void
 117 catch_sigint(G_GNUC_UNUSED int sig)
 118 {
 119         g_main_loop_quit(main_loop);
 120 }
 121
 122
 123 static void
 124 catch_sigcont(G_GNUC_UNUSED int sig)
 125 {
 126         char irrelevant = 'a';
 127         if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
 128                 exit(EXIT_FAILURE);
 129 }
 130
 131 void
 132 sigstop(void)
 133 {
 134         def_prog_mode();  /* save the tty modes */
 135         endwin();         /* end curses mode temporarily */
 136         kill(0, SIGSTOP); /* issue SIGSTOP */
 137 }
 138
 139 static gboolean
 140 sigwinch_event(G_GNUC_UNUSED GIOChannel *source,
 141                G_GNUC_UNUSED GIOCondition condition, G_GNUC_UNUSED gpointer data)
 142 {
 143         char ignoreme[64];
 144         if (1 > read(sigwinch_pipes[0], ignoreme, 64))
 145                 exit(EXIT_FAILURE);
 146
 147         endwin();
 148         refresh();
 149         screen_resize(mpd);
 150
 151         return TRUE;
 152 }
 153
 154 static void
 155 catch_sigwinch(G_GNUC_UNUSED int sig)
 156 {
 157         char irrelevant = 'a';
 158         if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
 159                 exit(EXIT_FAILURE);
 160 }
 161 #endif /* WIN32 */
 162
 163 static void
 164 idle_callback(enum mpd_error error,
 165               G_GNUC_UNUSED enum mpd_server_error server_error,
 166               const char *message, enum mpd_idle events,
 167               G_GNUC_UNUSED void *ctx);
 168
 169 static gboolean
 170 timer_mpd_update(gpointer data);
 171
 172 static void
 173 enable_update_timer(void)
 174 {
 175         if (update_source_id != 0)
 176                 return;
 177
 178         update_source_id = g_timeout_add(update_interval,
 179                                          timer_mpd_update, NULL);
 180 }
 181
 182 static void
 183 disable_update_timer(void)
 184 {
 185         if (update_source_id == 0)
 186                 return;
 187
 188         g_source_remove(update_source_id);
 189         update_source_id = 0;
 190 }
 191
 192 static bool
 193 should_enable_update_timer(void)
 194 {
 195         return (mpdclient_is_connected(mpd) &&
 196                 (mpd->source == NULL || /* "idle" not supported */
 197                  (mpd->status != NULL &&
 198                   mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
 199 #ifndef NCMPC_MINI
 200                 || options.display_time
 201 #endif
 202                 ;
 203 }
 204
 205 static void
 206 auto_update_timer(void)
 207 {
 208         if (should_enable_update_timer())
 209                 enable_update_timer();
 210         else
 211                 disable_update_timer();
 212 }
 213
 214 static void
 215 check_reconnect(void);
 216
 217 static void
 218 do_mpd_update(void)
 219 {
 220         if (mpdclient_is_connected(mpd) &&
 221             (mpd->source == NULL || mpd->events != 0 ||
 222              (mpd->status != NULL &&
 223               mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
 224                 mpdclient_update(mpd);
 225
 226 #ifndef NCMPC_MINI
 227         if (options.enable_xterm_title)
 228                 update_xterm_title();
 229 #endif
 230
 231         screen_update(mpd);
 232         mpd->events = 0;
 233
 234         mpdclient_put_connection(mpd);
 235         check_reconnect();
 236 }
 237
 238 #if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
 239
 240 static char *
 241 settings_name(const struct mpd_settings *settings)
 242 {
 243         const char *host = mpd_settings_get_host(settings);
 244         if (host == NULL)
 245                 host = _("unknown");
 246
 247         if (host[0] == '/')
 248                 return g_strdup(host);
 249
 250         unsigned port = mpd_settings_get_port(settings);
 251         if (port == 0 || port == 6600)
 252                 return g_strdup(host);
 253
 254         return g_strdup_printf("%s:%u", host, port);
 255 }
 256
 257 #endif
 258
 259 static char *
 260 default_settings_name(void)
 261 {
 262 #if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
 263         struct mpd_settings *settings =
 264                 mpd_settings_new(options.host, options.port, 0,
 265                                  NULL, options.password);
 266         if (settings == NULL)
 267                 return g_strdup(_("unknown"));
 268
 269         char *name = settings_name(settings);
 270         mpd_settings_free(settings);
 271
 272         return name;
 273 #else
 274         /*
 275          * localhost is actually not correct, we only know that
 276          * mpd_connection_new() has connected to the "default host".
 277          */
 278         const char *name = options.host ?: "localhost";
 279         return g_strdup(name);
 280 #endif
 281 }
 282
 283 static char *
 284 connection_settings_name(const struct mpd_connection *connection)
 285 {
 286 #if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
 287         const struct mpd_settings *settings =
 288                 mpd_connection_get_settings(connection);
 289         if (settings == NULL)
 290                 return g_strdup(_("unknown"));
 291
 292         return settings_name(settings);
 293 #else
 294         (void)connection;
 295
 296         return default_settings_name();
 297 #endif
 298 }
 299
 300 /**
 301  * This timer is installed when the connection to the MPD server is
 302  * broken.  It tries to recover by reconnecting periodically.
 303  */
 304 static gboolean
 305 timer_reconnect(G_GNUC_UNUSED gpointer data)
 306 {
 307         bool success;
 308         struct mpd_connection *connection;
 309
 310         assert(!mpdclient_is_connected(mpd));
 311
 312         reconnect_source_id = 0;
 313
 314         char *name = default_settings_name();
 315         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
 316                              name, get_key_names(CMD_QUIT, false));
 317         g_free(name);
 318         doupdate();
 319
 320         mpdclient_disconnect(mpd);
 321         success = mpdclient_connect(mpd,
 322                                     options.host, options.port,
 323                                     options.timeout_ms,
 324                                     options.password);
 325         if (!success) {
 326                 /* try again in 5 seconds */
 327                 reconnect_source_id = g_timeout_add(5000,
 328                                                     timer_reconnect, NULL);
 329                 return FALSE;
 330         }
 331
 332         connection = mpdclient_get_connection(mpd);
 333
 334 #ifndef NCMPC_MINI
 335         /* quit if mpd is pre 0.14 - song id not supported by mpd */
 336         if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0) {
 337                 const unsigned *version =
 338                         mpd_connection_get_server_version(connection);
 339                 screen_status_printf(_("Error: MPD version %d.%d.%d is to old (%s needed)"),
 340                                      version[0], version[1], version[2],
 341                                      "0.16.0");
 342                 mpdclient_disconnect(mpd);
 343                 doupdate();
 344
 345                 /* try again after 30 seconds */
 346                 reconnect_source_id = g_timeout_add(30000,
 347                                                     timer_reconnect, NULL);
 348                 return FALSE;
 349         }
 350 #endif
 351
 352         mpd->source = mpd_glib_new(connection,
 353                                    idle_callback, mpd);
 354
 355         name = connection_settings_name(connection);
 356         screen_status_printf(_("Connected to %s"), name);
 357         g_free(name);
 358         doupdate();
 359
 360         /* update immediately */
 361         mpd->events = MPD_IDLE_ALL;
 362
 363         do_mpd_update();
 364
 365         auto_update_timer();
 366
 367         return FALSE;
 368 }
 369
 370 static void
 371 check_reconnect(void)
 372 {
 373         if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
 374                 /* reconnect when the connection is lost */
 375                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 376                                                     NULL);
 377 }
 378
 379 /**
 380  * This function is called by the gidle.c library when MPD sends us an
 381  * idle event (or when the connection dies).
 382  */
 383 static void
 384 idle_callback(enum mpd_error error, enum mpd_server_error server_error,
 385               const char *message, enum mpd_idle events,
 386               void *ctx)
 387 {
 388         struct mpdclient *c = ctx;
 389
 390         c->idle = false;
 391
 392         assert(mpdclient_is_connected(c));
 393
 394         if (error != MPD_ERROR_SUCCESS) {
 395                 char *allocated;
 396
 397                 if (error == MPD_ERROR_SERVER &&
 398                     server_error == MPD_SERVER_ERROR_UNKNOWN_CMD) {
 399                         /* the "idle" command is not supported - fall
 400                            back to timer based polling */
 401                         mpd_glib_free(c->source);
 402                         c->source = NULL;
 403                         auto_update_timer();
 404                         return;
 405                 }
 406
 407                 if (error == MPD_ERROR_SERVER)
 408                         message = allocated = utf8_to_locale(message);
 409                 else
 410                         allocated = NULL;
 411                 screen_status_message(message);
 412                 g_free(allocated);
 413                 screen_bell();
 414                 doupdate();
 415
 416                 mpdclient_disconnect(c);
 417                 screen_update(mpd);
 418                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 419                                                     NULL);
 420                 return;
 421         }
 422
 423         c->events |= events;
 424         mpdclient_update(c);
 425
 426 #ifndef NCMPC_MINI
 427         if (options.enable_xterm_title)
 428                 update_xterm_title();
 429 #endif
 430
 431         screen_update(mpd);
 432         c->events = 0;
 433
 434         mpdclient_put_connection(c);
 435         check_reconnect();
 436         auto_update_timer();
 437 }
 438
 439 static gboolean
 440 timer_mpd_update(G_GNUC_UNUSED gpointer data)
 441 {
 442         do_mpd_update();
 443
 444         if (should_enable_update_timer())
 445                 return true;
 446         else {
 447                 update_source_id = 0;
 448                 return false;
 449         }
 450 }
 451
 452 void begin_input_event(void)
 453 {
 454 }
 455
 456 void end_input_event(void)
 457 {
 458         screen_update(mpd);
 459         mpd->events = 0;
 460
 461         mpdclient_put_connection(mpd);
 462         check_reconnect();
 463         auto_update_timer();
 464 }
 465
 466 int do_input_event(command_t cmd)
 467 {
 468         if (cmd == CMD_QUIT) {
 469                 g_main_loop_quit(main_loop);
 470                 return -1;
 471         }
 472
 473         screen_cmd(mpd, cmd);
 474
 475         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
 476                 /* make sure we don't update the volume yet */
 477                 disable_update_timer();
 478
 479         return 0;
 480 }
 481
 482 static gboolean
 483 keyboard_event(G_GNUC_UNUSED GIOChannel *source,
 484                G_GNUC_UNUSED GIOCondition condition,
 485                G_GNUC_UNUSED gpointer data)
 486 {
 487         command_t cmd;
 488
 489         begin_input_event();
 490
 491         if ((cmd=get_keyboard_command()) != CMD_NONE)
 492                 if (do_input_event(cmd) != 0)
 493                         return FALSE;
 494
 495         end_input_event();
 496         return TRUE;
 497 }
 498
 499 #ifndef NCMPC_MINI
 500 /**
 501  * Check the configured key bindings for errors, and display a status
 502  * message every 10 seconds.
 503  */
 504 static gboolean
 505 timer_check_key_bindings(G_GNUC_UNUSED gpointer data)
 506 {
 507         char buf[256];
 508 #ifdef ENABLE_KEYDEF_SCREEN
 509         char comment[64];
 510 #endif
 511         gboolean key_error;
 512
 513         key_error = check_key_bindings(NULL, buf, sizeof(buf));
 514         if (!key_error) {
 515                 /* no error: disable this timer for the rest of this
 516                    process */
 517                 check_key_bindings_source_id = 0;
 518                 return FALSE;
 519         }
 520
 521 #ifdef ENABLE_KEYDEF_SCREEN
 522         g_strchomp(buf);
 523         g_strlcat(buf, " (", sizeof(buf));
 524         /* to translators: a key was bound twice in the key editor,
 525            and this is a hint for the user what to press to correct
 526            that */
 527         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 528                    get_key_names(CMD_SCREEN_KEYDEF, false));
 529         g_strlcat(buf, comment, sizeof(buf));
 530         g_strlcat(buf, ")", sizeof(buf));
 531 #endif
 532
 533         screen_status_printf("%s", buf);
 534
 535         doupdate();
 536         return TRUE;
 537 }
 538 #endif
 539
 540 int
 541 main(int argc, const char *argv[])
 542 {
 543 #ifndef WIN32
 544         struct sigaction act;
 545 #endif
 546 #ifdef ENABLE_LOCALE
 547 #ifndef ENABLE_NLS
 548         G_GNUC_UNUSED
 549 #endif
 550         const char *charset = NULL;
 551 #endif
 552         GIOChannel *keyboard_channel;
 553 #ifdef ENABLE_LIRC
 554         int lirc_socket;
 555         GIOChannel *lirc_channel = NULL;
 556 #endif
 557         GIOChannel *sigwinch_channel = NULL;
 558
 559 #ifdef ENABLE_LOCALE
 560         /* time and date formatting */
 561         setlocale(LC_TIME,"");
 562         /* care about sorting order etc */
 563         setlocale(LC_COLLATE,"");
 564         /* charset */
 565         setlocale(LC_CTYPE,"");
 566         /* initialize charset conversions */
 567         charset = charset_init();
 568
 569         /* initialize i18n support */
 570 #endif
 571
 572 #ifdef ENABLE_NLS
 573         setlocale(LC_MESSAGES, "");
 574         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 575 #ifdef ENABLE_LOCALE
 576         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 577 #endif
 578         textdomain(GETTEXT_PACKAGE);
 579 #endif
 580
 581         /* initialize options */
 582         options_init();
 583
 584         /* parse command line options - 1 pass get configuration files */
 585         options_parse(argc, argv);
 586
 587 #ifndef NCMPC_MINI
 588         /* read configuration */
 589         read_configuration();
 590
 591         /* check key bindings */
 592         check_key_bindings(NULL, NULL, 0);
 593 #endif
 594
 595         /* parse command line options - 2 pass */
 596         options_parse(argc, argv);
 597
 598 #ifndef WIN32
 599         /* setup signal behavior - SIGINT */
 600         sigemptyset(&act.sa_mask);
 601         act.sa_flags = 0;
 602         act.sa_handler = catch_sigint;
 603         if (sigaction(SIGINT, &act, NULL) < 0) {
 604                 perror("signal");
 605                 exit(EXIT_FAILURE);
 606         }
 607
 608         /* setup signal behavior - SIGTERM */
 609
 610         act.sa_handler = catch_sigint;
 611         if (sigaction(SIGTERM, &act, NULL) < 0) {
 612                 perror("sigaction()");
 613                 exit(EXIT_FAILURE);
 614         }
 615
 616         /* setup signal behavior - SIGCONT */
 617
 618         act.sa_handler = catch_sigcont;
 619         if (sigaction(SIGCONT, &act, NULL) < 0) {
 620                 perror("sigaction(SIGCONT)");
 621                 exit(EXIT_FAILURE);
 622         }
 623
 624         /* setup signal behaviour - SIGHUP*/
 625
 626         act.sa_handler = catch_sigint;
 627         if (sigaction(SIGHUP, &act, NULL) < 0) {
 628                 perror("sigaction(SIGHUP)");
 629                 exit(EXIT_FAILURE);
 630         }
 631
 632         /* setup SIGWINCH */
 633
 634         act.sa_flags = SA_RESTART;
 635         act.sa_handler = catch_sigwinch;
 636         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 637                 perror("sigaction(SIGWINCH)");
 638                 exit(EXIT_FAILURE);
 639         }
 640
 641         /* ignore SIGPIPE */
 642
 643         act.sa_handler = SIG_IGN;
 644         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 645                 perror("sigaction(SIGPIPE)");
 646                 exit(EXIT_FAILURE);
 647         }
 648 #endif
 649
 650         ncu_init();
 651
 652 #ifdef ENABLE_LYRICS_SCREEN
 653         lyrics_init();
 654 #endif
 655
 656         /* create mpdclient instance */
 657         mpd = mpdclient_new();
 658
 659         /* initialize curses */
 660         screen_init(mpd);
 661
 662         /* the main loop */
 663         main_loop = g_main_loop_new(NULL, FALSE);
 664
 665         /* watch out for keyboard input */
 666         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 667         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 668
 669 #ifdef ENABLE_LIRC
 670         /* watch out for lirc input */
 671         lirc_socket = ncmpc_lirc_open();
 672         if (lirc_socket >= 0) {
 673                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 674                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 675         }
 676 #endif
 677
 678 #ifndef WIN32
 679         if (!pipe(sigwinch_pipes) &&
 680                 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
 681                 sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
 682                 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
 683         }
 684         else {
 685                 perror("sigwinch pipe creation failed");
 686                 exit(EXIT_FAILURE);
 687         }
 688 #endif
 689
 690         /* attempt to connect */
 691         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 692
 693         auto_update_timer();
 694
 695 #ifndef NCMPC_MINI
 696         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 697 #endif
 698
 699         screen_paint(mpd);
 700
 701         g_main_loop_run(main_loop);
 702
 703         /* cleanup */
 704
 705         cancel_seek_timer();
 706
 707         disable_update_timer();
 708
 709         if (reconnect_source_id != 0)
 710                 g_source_remove(reconnect_source_id);
 711
 712 #ifndef NCMPC_MINI
 713         if (check_key_bindings_source_id != 0)
 714                 g_source_remove(check_key_bindings_source_id);
 715 #endif
 716
 717         g_main_loop_unref(main_loop);
 718         g_io_channel_unref(keyboard_channel);
 719         g_io_channel_unref(sigwinch_channel);
 720         close(sigwinch_pipes[0]);
 721         close(sigwinch_pipes[1]);
 722
 723 #ifdef ENABLE_LIRC
 724         if (lirc_socket >= 0)
 725                 g_io_channel_unref(lirc_channel);
 726         ncmpc_lirc_close();
 727 #endif
 728
 729         exit_and_cleanup();
 730
 731 #ifdef ENABLE_LYRICS_SCREEN
 732         lyrics_deinit();
 733 #endif
 734
 735         ncu_deinit();
 736         options_deinit();
 737
 738         return 0;
 739 }