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