src/main.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2017 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 "callbacks.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_free(mpd);
 110         }
 111 }
 112
 113 #ifndef WIN32
 114 static void
 115 catch_sigint(gcc_unused int sig)
 116 {
 117         g_main_loop_quit(main_loop);
 118 }
 119
 120
 121 static void
 122 catch_sigcont(gcc_unused int sig)
 123 {
 124         char irrelevant = 'a';
 125         if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
 126                 exit(EXIT_FAILURE);
 127 }
 128
 129 void
 130 sigstop(void)
 131 {
 132         def_prog_mode();  /* save the tty modes */
 133         endwin();         /* end curses mode temporarily */
 134         kill(0, SIGSTOP); /* issue SIGSTOP */
 135 }
 136
 137 static gboolean
 138 sigwinch_event(gcc_unused GIOChannel *source,
 139                gcc_unused GIOCondition condition, gcc_unused gpointer data)
 140 {
 141         char ignoreme[64];
 142         if (1 > read(sigwinch_pipes[0], ignoreme, 64))
 143                 exit(EXIT_FAILURE);
 144
 145         endwin();
 146         refresh();
 147         screen_resize(mpd);
 148
 149         return TRUE;
 150 }
 151
 152 static void
 153 catch_sigwinch(gcc_unused int sig)
 154 {
 155         if (1 != write(sigwinch_pipes[1], "", 1))
 156                 exit(EXIT_FAILURE);
 157 }
 158 #endif /* WIN32 */
 159
 160 static gboolean
 161 timer_mpd_update(gpointer data);
 162
 163 static void
 164 enable_update_timer(void)
 165 {
 166         if (update_source_id != 0)
 167                 return;
 168
 169         update_source_id = g_timeout_add(update_interval,
 170                                          timer_mpd_update, NULL);
 171 }
 172
 173 static void
 174 disable_update_timer(void)
 175 {
 176         if (update_source_id == 0)
 177                 return;
 178
 179         g_source_remove(update_source_id);
 180         update_source_id = 0;
 181 }
 182
 183 static bool
 184 should_enable_update_timer(void)
 185 {
 186         return (mpdclient_is_connected(mpd) &&
 187                 mpd->status != NULL &&
 188                 mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)
 189 #ifndef NCMPC_MINI
 190                 || options.display_time
 191 #endif
 192                 ;
 193 }
 194
 195 static void
 196 auto_update_timer(void)
 197 {
 198         if (should_enable_update_timer())
 199                 enable_update_timer();
 200         else
 201                 disable_update_timer();
 202 }
 203
 204 static void
 205 check_reconnect(void);
 206
 207 static void
 208 do_mpd_update(void)
 209 {
 210         if (mpdclient_is_connected(mpd) &&
 211             (mpd->events != 0 ||
 212              (mpd->status != NULL &&
 213               mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
 214                 mpdclient_update(mpd);
 215
 216 #ifndef NCMPC_MINI
 217         if (options.enable_xterm_title)
 218                 update_xterm_title();
 219 #endif
 220
 221         screen_update(mpd);
 222         mpd->events = 0;
 223
 224         mpdclient_put_connection(mpd);
 225         check_reconnect();
 226 }
 227
 228 static char *
 229 settings_name(const struct mpd_settings *settings)
 230 {
 231         const char *host = mpd_settings_get_host(settings);
 232         if (host == NULL)
 233                 host = _("unknown");
 234
 235         if (host[0] == '/')
 236                 return g_strdup(host);
 237
 238         unsigned port = mpd_settings_get_port(settings);
 239         if (port == 0 || port == 6600)
 240                 return g_strdup(host);
 241
 242         return g_strdup_printf("%s:%u", host, port);
 243 }
 244
 245 static char *
 246 default_settings_name(void)
 247 {
 248         struct mpd_settings *settings =
 249                 mpd_settings_new(options.host, options.port, 0,
 250                                  NULL, options.password);
 251         if (settings == NULL)
 252                 return g_strdup(_("unknown"));
 253
 254         char *name = settings_name(settings);
 255         mpd_settings_free(settings);
 256
 257         return name;
 258 }
 259
 260 /**
 261  * This timer is installed when the connection to the MPD server is
 262  * broken.  It tries to recover by reconnecting periodically.
 263  */
 264 static gboolean
 265 timer_reconnect(gcc_unused gpointer data)
 266 {
 267         assert(!mpdclient_is_connected(mpd));
 268
 269         reconnect_source_id = 0;
 270
 271         char *name = default_settings_name();
 272         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
 273                              name, get_key_names(CMD_QUIT, false));
 274         g_free(name);
 275         doupdate();
 276
 277         mpdclient_disconnect(mpd);
 278         if (!mpdclient_connect(mpd, options.host, options.port,
 279                                options.timeout_ms,
 280                                options.password)) {
 281                 /* try again in 5 seconds */
 282                 reconnect_source_id = g_timeout_add(5000,
 283                                                     timer_reconnect, NULL);
 284                 return FALSE;
 285         }
 286
 287 #ifndef NCMPC_MINI
 288         /* quit if mpd is pre 0.14 - song id not supported by mpd */
 289         struct mpd_connection *connection = mpdclient_get_connection(mpd);
 290         if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0) {
 291                 const unsigned *version =
 292                         mpd_connection_get_server_version(connection);
 293                 screen_status_printf(_("Error: MPD version %d.%d.%d is too old (%s needed)"),
 294                                      version[0], version[1], version[2],
 295                                      "0.16.0");
 296                 mpdclient_disconnect(mpd);
 297                 doupdate();
 298
 299                 /* try again after 30 seconds */
 300                 reconnect_source_id = g_timeout_add(30000,
 301                                                     timer_reconnect, NULL);
 302                 return FALSE;
 303         }
 304 #endif
 305
 306         screen_status_clear_message();
 307         doupdate();
 308
 309         /* update immediately */
 310         mpd->events = MPD_IDLE_ALL;
 311
 312         do_mpd_update();
 313
 314         auto_update_timer();
 315
 316         return FALSE;
 317 }
 318
 319 static void
 320 check_reconnect(void)
 321 {
 322         if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
 323                 /* reconnect when the connection is lost */
 324                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 325                                                     NULL);
 326 }
 327
 328 void
 329 mpdclient_lost_callback(void)
 330 {
 331         assert(reconnect_source_id == 0);
 332
 333         screen_update(mpd);
 334
 335         reconnect_source_id = g_timeout_add(1000, timer_reconnect, NULL);
 336 }
 337
 338 /**
 339  * This function is called by the gidle.c library when MPD sends us an
 340  * idle event (or when the connection dies).
 341  */
 342 void
 343 mpdclient_idle_callback(gcc_unused enum mpd_idle events)
 344 {
 345 #ifndef NCMPC_MINI
 346         if (options.enable_xterm_title)
 347                 update_xterm_title();
 348 #endif
 349
 350         screen_update(mpd);
 351         auto_update_timer();
 352 }
 353
 354 static gboolean
 355 timer_mpd_update(gcc_unused gpointer data)
 356 {
 357         do_mpd_update();
 358
 359         if (should_enable_update_timer())
 360                 return true;
 361         else {
 362                 update_source_id = 0;
 363                 return false;
 364         }
 365 }
 366
 367 void begin_input_event(void)
 368 {
 369 }
 370
 371 void end_input_event(void)
 372 {
 373         screen_update(mpd);
 374         mpd->events = 0;
 375
 376         mpdclient_put_connection(mpd);
 377         check_reconnect();
 378         auto_update_timer();
 379 }
 380
 381 int do_input_event(command_t cmd)
 382 {
 383         if (cmd == CMD_QUIT) {
 384                 g_main_loop_quit(main_loop);
 385                 return -1;
 386         }
 387
 388         screen_cmd(mpd, cmd);
 389
 390         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
 391                 /* make sure we don't update the volume yet */
 392                 disable_update_timer();
 393
 394         return 0;
 395 }
 396
 397 static gboolean
 398 keyboard_event(gcc_unused GIOChannel *source,
 399                gcc_unused GIOCondition condition,
 400                gcc_unused gpointer data)
 401 {
 402         begin_input_event();
 403
 404         command_t cmd = get_keyboard_command();
 405         if (cmd != CMD_NONE)
 406                 if (do_input_event(cmd) != 0)
 407                         return FALSE;
 408
 409         end_input_event();
 410         return TRUE;
 411 }
 412
 413 #ifndef NCMPC_MINI
 414 /**
 415  * Check the configured key bindings for errors, and display a status
 416  * message every 10 seconds.
 417  */
 418 static gboolean
 419 timer_check_key_bindings(gcc_unused gpointer data)
 420 {
 421         char buf[256];
 422
 423         if (check_key_bindings(NULL, buf, sizeof(buf))) {
 424                 /* no error: disable this timer for the rest of this
 425                    process */
 426                 check_key_bindings_source_id = 0;
 427                 return FALSE;
 428         }
 429
 430 #ifdef ENABLE_KEYDEF_SCREEN
 431         g_strchomp(buf);
 432         g_strlcat(buf, " (", sizeof(buf));
 433         /* to translators: a key was bound twice in the key editor,
 434            and this is a hint for the user what to press to correct
 435            that */
 436         char comment[64];
 437         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 438                    get_key_names(CMD_SCREEN_KEYDEF, false));
 439         g_strlcat(buf, comment, sizeof(buf));
 440         g_strlcat(buf, ")", sizeof(buf));
 441 #endif
 442
 443         screen_status_printf("%s", buf);
 444
 445         doupdate();
 446         return TRUE;
 447 }
 448 #endif
 449
 450 int
 451 main(int argc, const char *argv[])
 452 {
 453 #ifdef ENABLE_LOCALE
 454 #ifndef ENABLE_NLS
 455         gcc_unused
 456 #endif
 457         const char *charset = NULL;
 458         /* time and date formatting */
 459         setlocale(LC_TIME,"");
 460         /* care about sorting order etc */
 461         setlocale(LC_COLLATE,"");
 462         /* charset */
 463         setlocale(LC_CTYPE,"");
 464         /* initialize charset conversions */
 465         charset = charset_init();
 466
 467         /* initialize i18n support */
 468 #endif
 469
 470 #ifdef ENABLE_NLS
 471         setlocale(LC_MESSAGES, "");
 472         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 473 #ifdef ENABLE_LOCALE
 474         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 475 #endif
 476         textdomain(GETTEXT_PACKAGE);
 477 #endif
 478
 479         /* initialize options */
 480         options_init();
 481
 482         /* parse command line options - 1 pass get configuration files */
 483         options_parse(argc, argv);
 484
 485 #ifndef NCMPC_MINI
 486         /* read configuration */
 487         read_configuration();
 488
 489         /* check key bindings */
 490         check_key_bindings(NULL, NULL, 0);
 491 #endif
 492
 493         /* parse command line options - 2 pass */
 494         options_parse(argc, argv);
 495
 496 #ifndef WIN32
 497         /* setup signal behavior - SIGINT */
 498         struct sigaction act;
 499         sigemptyset(&act.sa_mask);
 500         act.sa_flags = 0;
 501         act.sa_handler = catch_sigint;
 502         if (sigaction(SIGINT, &act, NULL) < 0) {
 503                 perror("signal");
 504                 exit(EXIT_FAILURE);
 505         }
 506
 507         /* setup signal behavior - SIGTERM */
 508
 509         act.sa_handler = catch_sigint;
 510         if (sigaction(SIGTERM, &act, NULL) < 0) {
 511                 perror("sigaction()");
 512                 exit(EXIT_FAILURE);
 513         }
 514
 515         /* setup signal behavior - SIGCONT */
 516
 517         act.sa_handler = catch_sigcont;
 518         if (sigaction(SIGCONT, &act, NULL) < 0) {
 519                 perror("sigaction(SIGCONT)");
 520                 exit(EXIT_FAILURE);
 521         }
 522
 523         /* setup signal behaviour - SIGHUP*/
 524
 525         act.sa_handler = catch_sigint;
 526         if (sigaction(SIGHUP, &act, NULL) < 0) {
 527                 perror("sigaction(SIGHUP)");
 528                 exit(EXIT_FAILURE);
 529         }
 530
 531         /* setup SIGWINCH */
 532
 533         act.sa_flags = SA_RESTART;
 534         act.sa_handler = catch_sigwinch;
 535         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 536                 perror("sigaction(SIGWINCH)");
 537                 exit(EXIT_FAILURE);
 538         }
 539
 540         /* ignore SIGPIPE */
 541
 542         act.sa_handler = SIG_IGN;
 543         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 544                 perror("sigaction(SIGPIPE)");
 545                 exit(EXIT_FAILURE);
 546         }
 547 #endif
 548
 549         ncu_init();
 550
 551 #ifdef ENABLE_LYRICS_SCREEN
 552         lyrics_init();
 553 #endif
 554
 555         /* create mpdclient instance */
 556         mpd = mpdclient_new();
 557
 558         /* initialize curses */
 559         screen_init(mpd);
 560
 561         /* the main loop */
 562         main_loop = g_main_loop_new(NULL, FALSE);
 563
 564         /* watch out for keyboard input */
 565         GIOChannel *keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 566         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 567
 568 #ifdef ENABLE_LIRC
 569         /* watch out for lirc input */
 570         int lirc_socket = ncmpc_lirc_open();
 571         GIOChannel *lirc_channel = NULL;
 572         if (lirc_socket >= 0) {
 573                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 574                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 575         }
 576 #endif
 577
 578 #ifndef WIN32
 579         GIOChannel *sigwinch_channel = NULL;
 580         if (!pipe(sigwinch_pipes) &&
 581                 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
 582                 sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
 583                 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
 584         }
 585         else {
 586                 perror("sigwinch pipe creation failed");
 587                 exit(EXIT_FAILURE);
 588         }
 589 #endif
 590
 591         /* attempt to connect */
 592         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 593
 594         auto_update_timer();
 595
 596 #ifndef NCMPC_MINI
 597         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 598 #endif
 599
 600         screen_paint(mpd);
 601
 602         g_main_loop_run(main_loop);
 603
 604         /* cleanup */
 605
 606         cancel_seek_timer();
 607
 608         disable_update_timer();
 609
 610         if (reconnect_source_id != 0)
 611                 g_source_remove(reconnect_source_id);
 612
 613 #ifndef NCMPC_MINI
 614         if (check_key_bindings_source_id != 0)
 615                 g_source_remove(check_key_bindings_source_id);
 616 #endif
 617
 618         g_main_loop_unref(main_loop);
 619         g_io_channel_unref(keyboard_channel);
 620         g_io_channel_unref(sigwinch_channel);
 621         close(sigwinch_pipes[0]);
 622         close(sigwinch_pipes[1]);
 623
 624 #ifdef ENABLE_LIRC
 625         if (lirc_socket >= 0)
 626                 g_io_channel_unref(lirc_channel);
 627         ncmpc_lirc_close();
 628 #endif
 629
 630         exit_and_cleanup();
 631
 632 #ifdef ENABLE_LYRICS_SCREEN
 633         lyrics_deinit();
 634 #endif
 635
 636         ncu_deinit();
 637         options_deinit();
 638
 639         return 0;
 640 }