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