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_message.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 static void
 116 catch_sigint(G_GNUC_UNUSED int sig)
 117 {
 118         g_main_loop_quit(main_loop);
 119 }
 120
 121
 122 static void
 123 catch_sigcont(G_GNUC_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(G_GNUC_UNUSED GIOChannel *source,
 140                G_GNUC_UNUSED GIOCondition condition, G_GNUC_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(G_GNUC_UNUSED int sig)
 155 {
 156         char irrelevant = 'a';
 157         if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
 158                 exit(EXIT_FAILURE);
 159 }
 160
 161 static void
 162 idle_callback(enum mpd_error error,
 163               G_GNUC_UNUSED enum mpd_server_error server_error,
 164               const char *message, enum mpd_idle events,
 165               G_GNUC_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 #if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
 237
 238 static char *
 239 settings_name(const struct mpd_settings *settings)
 240 {
 241         const char *host = mpd_settings_get_host(settings);
 242         if (host == NULL)
 243                 host = "unknown";
 244
 245         if (host[0] == '/')
 246                 return g_strdup(host);
 247
 248         unsigned port = mpd_settings_get_port(settings);
 249         if (port == 0 || port == 6600)
 250                 return g_strdup(host);
 251
 252         return g_strdup_printf("%s:%u", host, port);
 253 }
 254
 255 #endif
 256
 257 static char *
 258 default_settings_name(void)
 259 {
 260 #if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
 261         struct mpd_settings *settings =
 262                 mpd_settings_new(options.host, options.port, 0,
 263                                  NULL, options.password);
 264         if (settings == NULL)
 265                 return g_strdup("unknown");
 266
 267         char *name = settings_name(settings);
 268         mpd_settings_free(settings);
 269
 270         return name;
 271 #else
 272         return g_strdup(options.host);
 273 #endif
 274 }
 275
 276 static char *
 277 connection_settings_name(const struct mpd_connection *connection)
 278 {
 279 #if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
 280         const struct mpd_settings *settings =
 281                 mpd_connection_get_settings(connection);
 282         if (settings == NULL)
 283                 return g_strdup("unknown");
 284
 285         return settings_name(settings);
 286 #else
 287         (void)connection;
 288
 289         /*
 290          * localhost is actually not correct, we only know that
 291          * mpd_connection_new() has connected to the "default host".
 292          */
 293         const char *name = options.host ?: "localhost";
 294         return g_strdup(name);
 295 #endif
 296 }
 297
 298 /**
 299  * This timer is installed when the connection to the MPD server is
 300  * broken.  It tries to recover by reconnecting periodically.
 301  */
 302 static gboolean
 303 timer_reconnect(G_GNUC_UNUSED gpointer data)
 304 {
 305         bool success;
 306         struct mpd_connection *connection;
 307
 308         assert(!mpdclient_is_connected(mpd));
 309
 310         reconnect_source_id = 0;
 311
 312         char *name = default_settings_name();
 313         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
 314                              name, get_key_names(CMD_QUIT,0) );
 315         g_free(name);
 316         doupdate();
 317
 318         mpdclient_disconnect(mpd);
 319         success = mpdclient_connect(mpd,
 320                                     options.host, options.port,
 321                                     1.5,
 322                                     options.password);
 323         if (!success) {
 324                 /* try again in 5 seconds */
 325                 reconnect_source_id = g_timeout_add(5000,
 326                                                     timer_reconnect, NULL);
 327                 return FALSE;
 328         }
 329
 330         connection = mpdclient_get_connection(mpd);
 331
 332 #ifndef NCMPC_MINI
 333         /* quit if mpd is pre 0.11.0 - song id not supported by mpd */
 334         if (mpd_connection_cmp_server_version(connection, 0, 12, 0) < 0) {
 335                 const unsigned *version =
 336                         mpd_connection_get_server_version(connection);
 337                 screen_status_printf(_("Error: MPD version %d.%d.%d is to old (%s needed)"),
 338                                      version[0], version[1], version[2],
 339                                      "0.12.0");
 340                 mpdclient_disconnect(mpd);
 341                 doupdate();
 342
 343                 /* try again after 30 seconds */
 344                 reconnect_source_id = g_timeout_add(30000,
 345                                                     timer_reconnect, NULL);
 346                 return FALSE;
 347         }
 348 #endif
 349
 350         if (mpd_connection_cmp_server_version(connection,
 351                                               0, 14, 0) >= 0)
 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_DATABASE|MPD_IDLE_STORED_PLAYLIST|
 362                 MPD_IDLE_QUEUE|MPD_IDLE_PLAYER|MPD_IDLE_MIXER|MPD_IDLE_OUTPUT|
 363                 MPD_IDLE_OPTIONS|MPD_IDLE_UPDATE;
 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 connectiond 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_get_connection(c) != NULL);
 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, 0));
 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         struct sigaction act;
 546 #ifdef ENABLE_LOCALE
 547         const char *charset = NULL;
 548 #endif
 549         GIOChannel *keyboard_channel;
 550 #ifdef ENABLE_LIRC
 551         int lirc_socket;
 552         GIOChannel *lirc_channel = NULL;
 553 #endif
 554         GIOChannel *sigwinch_channel = NULL;
 555
 556 #ifdef ENABLE_LOCALE
 557         /* time and date formatting */
 558         setlocale(LC_TIME,"");
 559         /* care about sorting order etc */
 560         setlocale(LC_COLLATE,"");
 561         /* charset */
 562         setlocale(LC_CTYPE,"");
 563         /* initialize charset conversions */
 564         charset = charset_init();
 565
 566         /* initialize i18n support */
 567 #endif
 568
 569 #ifdef ENABLE_NLS
 570         setlocale(LC_MESSAGES, "");
 571         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 572 #ifdef ENABLE_LOCALE
 573         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 574 #endif
 575         textdomain(GETTEXT_PACKAGE);
 576 #endif
 577
 578         /* initialize options */
 579         options_init();
 580
 581         /* parse command line options - 1 pass get configuration files */
 582         options_parse(argc, argv);
 583
 584 #ifndef NCMPC_MINI
 585         /* read configuration */
 586         read_configuration();
 587
 588         /* check key bindings */
 589         check_key_bindings(NULL, NULL, 0);
 590 #endif
 591
 592         /* parse command line options - 2 pass */
 593         options_parse(argc, argv);
 594
 595         /* setup signal behavior - SIGINT */
 596         sigemptyset(&act.sa_mask);
 597         act.sa_flags = 0;
 598         act.sa_handler = catch_sigint;
 599         if (sigaction(SIGINT, &act, NULL) < 0) {
 600                 perror("signal");
 601                 exit(EXIT_FAILURE);
 602         }
 603
 604         /* setup signal behavior - SIGTERM */
 605
 606         act.sa_handler = catch_sigint;
 607         if (sigaction(SIGTERM, &act, NULL) < 0) {
 608                 perror("sigaction()");
 609                 exit(EXIT_FAILURE);
 610         }
 611
 612         /* setup signal behavior - SIGCONT */
 613
 614         act.sa_handler = catch_sigcont;
 615         if (sigaction(SIGCONT, &act, NULL) < 0) {
 616                 perror("sigaction(SIGCONT)");
 617                 exit(EXIT_FAILURE);
 618         }
 619
 620         /* setup signal behaviour - SIGHUP*/
 621
 622         act.sa_handler = catch_sigint;
 623         if (sigaction(SIGHUP, &act, NULL) < 0) {
 624                 perror("sigaction(SIGHUP)");
 625                 exit(EXIT_FAILURE);
 626         }
 627
 628         /* setup SIGWINCH */
 629
 630         act.sa_flags = SA_RESTART;
 631         act.sa_handler = catch_sigwinch;
 632         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 633                 perror("sigaction(SIGWINCH)");
 634                 exit(EXIT_FAILURE);
 635         }
 636
 637         /* ignore SIGPIPE */
 638
 639         act.sa_handler = SIG_IGN;
 640         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 641                 perror("sigaction(SIGPIPE)");
 642                 exit(EXIT_FAILURE);
 643         }
 644
 645         ncu_init();
 646
 647 #ifdef ENABLE_LYRICS_SCREEN
 648         lyrics_init();
 649 #endif
 650
 651         /* create mpdclient instance */
 652         mpd = mpdclient_new();
 653
 654         /* initialize curses */
 655         screen_init(mpd);
 656
 657         /* the main loop */
 658         main_loop = g_main_loop_new(NULL, FALSE);
 659
 660         /* watch out for keyboard input */
 661         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 662         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 663
 664 #ifdef ENABLE_LIRC
 665         /* watch out for lirc input */
 666         lirc_socket = ncmpc_lirc_open();
 667         if (lirc_socket >= 0) {
 668                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 669                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 670         }
 671 #endif
 672
 673         if (!pipe(sigwinch_pipes) &&
 674                 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
 675                 sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
 676                 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
 677         }
 678         else {
 679                 perror("sigwinch pipe creation failed");
 680                 exit(EXIT_FAILURE);
 681         }
 682
 683         /* attempt to connect */
 684         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 685
 686         auto_update_timer();
 687
 688 #ifndef NCMPC_MINI
 689         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 690 #endif
 691
 692         screen_paint(mpd);
 693
 694         g_main_loop_run(main_loop);
 695
 696         /* cleanup */
 697
 698         cancel_seek_timer();
 699
 700         disable_update_timer();
 701
 702         if (reconnect_source_id != 0)
 703                 g_source_remove(reconnect_source_id);
 704
 705 #ifndef NCMPC_MINI
 706         if (check_key_bindings_source_id != 0)
 707                 g_source_remove(check_key_bindings_source_id);
 708 #endif
 709
 710         g_main_loop_unref(main_loop);
 711         g_io_channel_unref(keyboard_channel);
 712         g_io_channel_unref(sigwinch_channel);
 713         close(sigwinch_pipes[0]);
 714         close(sigwinch_pipes[1]);
 715
 716 #ifdef ENABLE_LIRC
 717         if (lirc_socket >= 0)
 718                 g_io_channel_unref(lirc_channel);
 719         ncmpc_lirc_close();
 720 #endif
 721
 722         exit_and_cleanup();
 723
 724 #ifdef ENABLE_LYRICS_SCREEN
 725         lyrics_deinit();
 726 #endif
 727
 728         ncu_deinit();
 729         options_deinit();
 730
 731         return 0;
 732 }