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                                     5000,
 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 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_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 #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         /* setup signal behavior - SIGINT */
 599         sigemptyset(&act.sa_mask);
 600         act.sa_flags = 0;
 601         act.sa_handler = catch_sigint;
 602         if (sigaction(SIGINT, &act, NULL) < 0) {
 603                 perror("signal");
 604                 exit(EXIT_FAILURE);
 605         }
 606
 607         /* setup signal behavior - SIGTERM */
 608
 609         act.sa_handler = catch_sigint;
 610         if (sigaction(SIGTERM, &act, NULL) < 0) {
 611                 perror("sigaction()");
 612                 exit(EXIT_FAILURE);
 613         }
 614
 615         /* setup signal behavior - SIGCONT */
 616
 617         act.sa_handler = catch_sigcont;
 618         if (sigaction(SIGCONT, &act, NULL) < 0) {
 619                 perror("sigaction(SIGCONT)");
 620                 exit(EXIT_FAILURE);
 621         }
 622
 623         /* setup signal behaviour - SIGHUP*/
 624
 625         act.sa_handler = catch_sigint;
 626         if (sigaction(SIGHUP, &act, NULL) < 0) {
 627                 perror("sigaction(SIGHUP)");
 628                 exit(EXIT_FAILURE);
 629         }
 630
 631         /* setup SIGWINCH */
 632
 633         act.sa_flags = SA_RESTART;
 634         act.sa_handler = catch_sigwinch;
 635         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 636                 perror("sigaction(SIGWINCH)");
 637                 exit(EXIT_FAILURE);
 638         }
 639
 640         /* ignore SIGPIPE */
 641
 642         act.sa_handler = SIG_IGN;
 643         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 644                 perror("sigaction(SIGPIPE)");
 645                 exit(EXIT_FAILURE);
 646         }
 647
 648         ncu_init();
 649
 650 #ifdef ENABLE_LYRICS_SCREEN
 651         lyrics_init();
 652 #endif
 653
 654         /* create mpdclient instance */
 655         mpd = mpdclient_new();
 656
 657         /* initialize curses */
 658         screen_init(mpd);
 659
 660         /* the main loop */
 661         main_loop = g_main_loop_new(NULL, FALSE);
 662
 663         /* watch out for keyboard input */
 664         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 665         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 666
 667 #ifdef ENABLE_LIRC
 668         /* watch out for lirc input */
 669         lirc_socket = ncmpc_lirc_open();
 670         if (lirc_socket >= 0) {
 671                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 672                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 673         }
 674 #endif
 675
 676         if (!pipe(sigwinch_pipes) &&
 677                 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
 678                 sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
 679                 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
 680         }
 681         else {
 682                 perror("sigwinch pipe creation failed");
 683                 exit(EXIT_FAILURE);
 684         }
 685
 686         /* attempt to connect */
 687         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 688
 689         auto_update_timer();
 690
 691 #ifndef NCMPC_MINI
 692         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 693 #endif
 694
 695         screen_paint(mpd);
 696
 697         g_main_loop_run(main_loop);
 698
 699         /* cleanup */
 700
 701         cancel_seek_timer();
 702
 703         disable_update_timer();
 704
 705         if (reconnect_source_id != 0)
 706                 g_source_remove(reconnect_source_id);
 707
 708 #ifndef NCMPC_MINI
 709         if (check_key_bindings_source_id != 0)
 710                 g_source_remove(check_key_bindings_source_id);
 711 #endif
 712
 713         g_main_loop_unref(main_loop);
 714         g_io_channel_unref(keyboard_channel);
 715         g_io_channel_unref(sigwinch_channel);
 716         close(sigwinch_pipes[0]);
 717         close(sigwinch_pipes[1]);
 718
 719 #ifdef ENABLE_LIRC
 720         if (lirc_socket >= 0)
 721                 g_io_channel_unref(lirc_channel);
 722         ncmpc_lirc_close();
 723 #endif
 724
 725         exit_and_cleanup();
 726
 727 #ifdef ENABLE_LYRICS_SCREEN
 728         lyrics_deinit();
 729 #endif
 730
 731         ncu_deinit();
 732         options_deinit();
 733
 734         return 0;
 735 }