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 0.11.0 - song id not supported by mpd */
 336         if (mpd_connection_cmp_server_version(connection, 0, 12, 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                                      "0.12.0");
 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         if (mpd_connection_cmp_server_version(connection,
 353                                               0, 14, 0) >= 0)
 354                 mpd->source = mpd_glib_new(connection,
 355                                            idle_callback, mpd);
 356
 357         name = connection_settings_name(connection);
 358         screen_status_printf(_("Connected to %s"), name);
 359         g_free(name);
 360         doupdate();
 361
 362         /* update immediately */
 363         mpd->events = MPD_IDLE_ALL;
 364
 365         do_mpd_update();
 366
 367         auto_update_timer();
 368
 369         return FALSE;
 370 }
 371
 372 static void
 373 check_reconnect(void)
 374 {
 375         if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
 376                 /* reconnect when the connection is lost */
 377                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 378                                                     NULL);
 379 }
 380
 381 /**
 382  * This function is called by the gidle.c library when MPD sends us an
 383  * idle event (or when the connection dies).
 384  */
 385 static void
 386 idle_callback(enum mpd_error error, enum mpd_server_error server_error,
 387               const char *message, enum mpd_idle events,
 388               void *ctx)
 389 {
 390         struct mpdclient *c = ctx;
 391
 392         c->idle = false;
 393
 394         assert(mpdclient_is_connected(c));
 395
 396         if (error != MPD_ERROR_SUCCESS) {
 397                 char *allocated;
 398
 399                 if (error == MPD_ERROR_SERVER &&
 400                     server_error == MPD_SERVER_ERROR_UNKNOWN_CMD) {
 401                         /* the "idle" command is not supported - fall
 402                            back to timer based polling */
 403                         mpd_glib_free(c->source);
 404                         c->source = NULL;
 405                         auto_update_timer();
 406                         return;
 407                 }
 408
 409                 if (error == MPD_ERROR_SERVER)
 410                         message = allocated = utf8_to_locale(message);
 411                 else
 412                         allocated = NULL;
 413                 screen_status_message(message);
 414                 g_free(allocated);
 415                 screen_bell();
 416                 doupdate();
 417
 418                 mpdclient_disconnect(c);
 419                 screen_update(mpd);
 420                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 421                                                     NULL);
 422                 return;
 423         }
 424
 425         c->events |= events;
 426         mpdclient_update(c);
 427
 428 #ifndef NCMPC_MINI
 429         if (options.enable_xterm_title)
 430                 update_xterm_title();
 431 #endif
 432
 433         screen_update(mpd);
 434         c->events = 0;
 435
 436         mpdclient_put_connection(c);
 437         check_reconnect();
 438         auto_update_timer();
 439 }
 440
 441 static gboolean
 442 timer_mpd_update(G_GNUC_UNUSED gpointer data)
 443 {
 444         do_mpd_update();
 445
 446         if (should_enable_update_timer())
 447                 return true;
 448         else {
 449                 update_source_id = 0;
 450                 return false;
 451         }
 452 }
 453
 454 void begin_input_event(void)
 455 {
 456 }
 457
 458 void end_input_event(void)
 459 {
 460         screen_update(mpd);
 461         mpd->events = 0;
 462
 463         mpdclient_put_connection(mpd);
 464         check_reconnect();
 465         auto_update_timer();
 466 }
 467
 468 int do_input_event(command_t cmd)
 469 {
 470         if (cmd == CMD_QUIT) {
 471                 g_main_loop_quit(main_loop);
 472                 return -1;
 473         }
 474
 475         screen_cmd(mpd, cmd);
 476
 477         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
 478                 /* make sure we don't update the volume yet */
 479                 disable_update_timer();
 480
 481         return 0;
 482 }
 483
 484 static gboolean
 485 keyboard_event(G_GNUC_UNUSED GIOChannel *source,
 486                G_GNUC_UNUSED GIOCondition condition,
 487                G_GNUC_UNUSED gpointer data)
 488 {
 489         command_t cmd;
 490
 491         begin_input_event();
 492
 493         if ((cmd=get_keyboard_command()) != CMD_NONE)
 494                 if (do_input_event(cmd) != 0)
 495                         return FALSE;
 496
 497         end_input_event();
 498         return TRUE;
 499 }
 500
 501 #ifndef NCMPC_MINI
 502 /**
 503  * Check the configured key bindings for errors, and display a status
 504  * message every 10 seconds.
 505  */
 506 static gboolean
 507 timer_check_key_bindings(G_GNUC_UNUSED gpointer data)
 508 {
 509         char buf[256];
 510 #ifdef ENABLE_KEYDEF_SCREEN
 511         char comment[64];
 512 #endif
 513         gboolean key_error;
 514
 515         key_error = check_key_bindings(NULL, buf, sizeof(buf));
 516         if (!key_error) {
 517                 /* no error: disable this timer for the rest of this
 518                    process */
 519                 check_key_bindings_source_id = 0;
 520                 return FALSE;
 521         }
 522
 523 #ifdef ENABLE_KEYDEF_SCREEN
 524         g_strchomp(buf);
 525         g_strlcat(buf, " (", sizeof(buf));
 526         /* to translators: a key was bound twice in the key editor,
 527            and this is a hint for the user what to press to correct
 528            that */
 529         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 530                    get_key_names(CMD_SCREEN_KEYDEF, false));
 531         g_strlcat(buf, comment, sizeof(buf));
 532         g_strlcat(buf, ")", sizeof(buf));
 533 #endif
 534
 535         screen_status_printf("%s", buf);
 536
 537         doupdate();
 538         return TRUE;
 539 }
 540 #endif
 541
 542 int
 543 main(int argc, const char *argv[])
 544 {
 545 #ifndef WIN32
 546         struct sigaction act;
 547 #endif
 548 #ifdef ENABLE_LOCALE
 549 #ifndef ENABLE_NLS
 550         G_GNUC_UNUSED
 551 #endif
 552         const char *charset = NULL;
 553 #endif
 554         GIOChannel *keyboard_channel;
 555 #ifdef ENABLE_LIRC
 556         int lirc_socket;
 557         GIOChannel *lirc_channel = NULL;
 558 #endif
 559         GIOChannel *sigwinch_channel = NULL;
 560
 561 #ifdef ENABLE_LOCALE
 562         /* time and date formatting */
 563         setlocale(LC_TIME,"");
 564         /* care about sorting order etc */
 565         setlocale(LC_COLLATE,"");
 566         /* charset */
 567         setlocale(LC_CTYPE,"");
 568         /* initialize charset conversions */
 569         charset = charset_init();
 570
 571         /* initialize i18n support */
 572 #endif
 573
 574 #ifdef ENABLE_NLS
 575         setlocale(LC_MESSAGES, "");
 576         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 577 #ifdef ENABLE_LOCALE
 578         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 579 #endif
 580         textdomain(GETTEXT_PACKAGE);
 581 #endif
 582
 583         /* initialize options */
 584         options_init();
 585
 586         /* parse command line options - 1 pass get configuration files */
 587         options_parse(argc, argv);
 588
 589 #ifndef NCMPC_MINI
 590         /* read configuration */
 591         read_configuration();
 592
 593         /* check key bindings */
 594         check_key_bindings(NULL, NULL, 0);
 595 #endif
 596
 597         /* parse command line options - 2 pass */
 598         options_parse(argc, argv);
 599
 600 #ifndef WIN32
 601         /* setup signal behavior - SIGINT */
 602         sigemptyset(&act.sa_mask);
 603         act.sa_flags = 0;
 604         act.sa_handler = catch_sigint;
 605         if (sigaction(SIGINT, &act, NULL) < 0) {
 606                 perror("signal");
 607                 exit(EXIT_FAILURE);
 608         }
 609
 610         /* setup signal behavior - SIGTERM */
 611
 612         act.sa_handler = catch_sigint;
 613         if (sigaction(SIGTERM, &act, NULL) < 0) {
 614                 perror("sigaction()");
 615                 exit(EXIT_FAILURE);
 616         }
 617
 618         /* setup signal behavior - SIGCONT */
 619
 620         act.sa_handler = catch_sigcont;
 621         if (sigaction(SIGCONT, &act, NULL) < 0) {
 622                 perror("sigaction(SIGCONT)");
 623                 exit(EXIT_FAILURE);
 624         }
 625
 626         /* setup signal behaviour - SIGHUP*/
 627
 628         act.sa_handler = catch_sigint;
 629         if (sigaction(SIGHUP, &act, NULL) < 0) {
 630                 perror("sigaction(SIGHUP)");
 631                 exit(EXIT_FAILURE);
 632         }
 633
 634         /* setup SIGWINCH */
 635
 636         act.sa_flags = SA_RESTART;
 637         act.sa_handler = catch_sigwinch;
 638         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 639                 perror("sigaction(SIGWINCH)");
 640                 exit(EXIT_FAILURE);
 641         }
 642
 643         /* ignore SIGPIPE */
 644
 645         act.sa_handler = SIG_IGN;
 646         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 647                 perror("sigaction(SIGPIPE)");
 648                 exit(EXIT_FAILURE);
 649         }
 650 #endif
 651
 652         ncu_init();
 653
 654 #ifdef ENABLE_LYRICS_SCREEN
 655         lyrics_init();
 656 #endif
 657
 658         /* create mpdclient instance */
 659         mpd = mpdclient_new();
 660
 661         /* initialize curses */
 662         screen_init(mpd);
 663
 664         /* the main loop */
 665         main_loop = g_main_loop_new(NULL, FALSE);
 666
 667         /* watch out for keyboard input */
 668         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 669         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 670
 671 #ifdef ENABLE_LIRC
 672         /* watch out for lirc input */
 673         lirc_socket = ncmpc_lirc_open();
 674         if (lirc_socket >= 0) {
 675                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 676                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 677         }
 678 #endif
 679
 680 #ifndef WIN32
 681         if (!pipe(sigwinch_pipes) &&
 682                 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
 683                 sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
 684                 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
 685         }
 686         else {
 687                 perror("sigwinch pipe creation failed");
 688                 exit(EXIT_FAILURE);
 689         }
 690 #endif
 691
 692         /* attempt to connect */
 693         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 694
 695         auto_update_timer();
 696
 697 #ifndef NCMPC_MINI
 698         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 699 #endif
 700
 701         screen_paint(mpd);
 702
 703         g_main_loop_run(main_loop);
 704
 705         /* cleanup */
 706
 707         cancel_seek_timer();
 708
 709         disable_update_timer();
 710
 711         if (reconnect_source_id != 0)
 712                 g_source_remove(reconnect_source_id);
 713
 714 #ifndef NCMPC_MINI
 715         if (check_key_bindings_source_id != 0)
 716                 g_source_remove(check_key_bindings_source_id);
 717 #endif
 718
 719         g_main_loop_unref(main_loop);
 720         g_io_channel_unref(keyboard_channel);
 721         g_io_channel_unref(sigwinch_channel);
 722         close(sigwinch_pipes[0]);
 723         close(sigwinch_pipes[1]);
 724
 725 #ifdef ENABLE_LIRC
 726         if (lirc_socket >= 0)
 727                 g_io_channel_unref(lirc_channel);
 728         ncmpc_lirc_close();
 729 #endif
 730
 731         exit_and_cleanup();
 732
 733 #ifdef ENABLE_LYRICS_SCREEN
 734         lyrics_deinit();
 735 #endif
 736
 737         ncu_deinit();
 738         options_deinit();
 739
 740         return 0;
 741 }