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 #include "keyboard.h"
  35 #include "lirc.h"
  36
  37 #ifndef NCMPC_MINI
  38 #include "conf.h"
  39 #endif
  40
  41 #ifdef ENABLE_LYRICS_SCREEN
  42 #include "lyrics.h"
  43 #endif
  44
  45 #include <mpd/client.h>
  46
  47 #include <stdlib.h>
  48 #include <unistd.h>
  49 #include <fcntl.h>
  50 #include <signal.h>
  51 #include <string.h>
  52
  53 #ifdef ENABLE_LOCALE
  54 #include <locale.h>
  55 #endif
  56
  57 /* time between mpd updates [ms] */
  58 static const guint update_interval = 500;
  59
  60 #define BUFSIZE 1024
  61
  62 static struct mpdclient *mpd = NULL;
  63 static GMainLoop *main_loop;
  64 static guint reconnect_source_id, update_source_id;
  65 static int sigwinch_pipes[2];
  66
  67 #ifndef NCMPC_MINI
  68 static guint check_key_bindings_source_id;
  69 #endif
  70
  71 #ifndef NCMPC_MINI
  72 static void
  73 update_xterm_title(void)
  74 {
  75         const struct mpd_song *song = mpd->song;
  76
  77         char tmp[BUFSIZE];
  78         if (options.xterm_title_format && mpd->playing && song)
  79                 strfsong(tmp, BUFSIZE, options.xterm_title_format, song);
  80         else
  81                 g_strlcpy(tmp, PACKAGE " version " VERSION, BUFSIZE);
  82
  83         static char title[BUFSIZE];
  84         if (strncmp(title, tmp, BUFSIZE)) {
  85                 g_strlcpy(title, tmp, BUFSIZE);
  86                 set_xterm_title("%s", title);
  87         }
  88 }
  89 #endif
  90
  91 #ifndef WIN32
  92 static void
  93 catch_sigint(gcc_unused int sig)
  94 {
  95         g_main_loop_quit(main_loop);
  96 }
  97
  98
  99 static void
 100 catch_sigcont(gcc_unused int sig)
 101 {
 102         if (1 != write(sigwinch_pipes[1], "", 1))
 103                 exit(EXIT_FAILURE);
 104 }
 105
 106 static gboolean
 107 sigwinch_event(gcc_unused GIOChannel *source,
 108                gcc_unused GIOCondition condition, gcc_unused gpointer data)
 109 {
 110         char ignoreme[64];
 111         if (1 > read(sigwinch_pipes[0], ignoreme, 64))
 112                 exit(EXIT_FAILURE);
 113
 114         endwin();
 115         refresh();
 116         screen_resize(mpd);
 117
 118         return TRUE;
 119 }
 120
 121 static void
 122 catch_sigwinch(gcc_unused int sig)
 123 {
 124         if (1 != write(sigwinch_pipes[1], "", 1))
 125                 exit(EXIT_FAILURE);
 126 }
 127 #endif /* WIN32 */
 128
 129 static gboolean
 130 timer_mpd_update(gpointer data);
 131
 132 static void
 133 enable_update_timer(void)
 134 {
 135         if (update_source_id != 0)
 136                 return;
 137
 138         update_source_id = g_timeout_add(update_interval,
 139                                          timer_mpd_update, NULL);
 140 }
 141
 142 static void
 143 disable_update_timer(void)
 144 {
 145         if (update_source_id == 0)
 146                 return;
 147
 148         g_source_remove(update_source_id);
 149         update_source_id = 0;
 150 }
 151
 152 static bool
 153 should_enable_update_timer(void)
 154 {
 155         return mpd->playing
 156 #ifndef NCMPC_MINI
 157                 || options.display_time
 158 #endif
 159                 ;
 160 }
 161
 162 static void
 163 auto_update_timer(void)
 164 {
 165         if (should_enable_update_timer())
 166                 enable_update_timer();
 167         else
 168                 disable_update_timer();
 169 }
 170
 171 static void
 172 check_reconnect(void);
 173
 174 static void
 175 do_mpd_update(void)
 176 {
 177         if (mpdclient_is_connected(mpd) &&
 178             (mpd->events != 0 || mpd->playing))
 179                 mpdclient_update(mpd);
 180
 181 #ifndef NCMPC_MINI
 182         if (options.enable_xterm_title)
 183                 update_xterm_title();
 184 #endif
 185
 186         screen_update(mpd);
 187         mpd->events = 0;
 188
 189         mpdclient_put_connection(mpd);
 190         check_reconnect();
 191 }
 192
 193 static char *
 194 settings_name(const struct mpd_settings *settings)
 195 {
 196         const char *host = mpd_settings_get_host(settings);
 197         if (host == NULL)
 198                 host = _("unknown");
 199
 200         if (host[0] == '/')
 201                 return g_strdup(host);
 202
 203         unsigned port = mpd_settings_get_port(settings);
 204         if (port == 0 || port == 6600)
 205                 return g_strdup(host);
 206
 207         return g_strdup_printf("%s:%u", host, port);
 208 }
 209
 210 static char *
 211 default_settings_name(void)
 212 {
 213         struct mpd_settings *settings =
 214                 mpd_settings_new(options.host, options.port, 0,
 215                                  NULL, options.password);
 216         if (settings == NULL)
 217                 return g_strdup(_("unknown"));
 218
 219         char *name = settings_name(settings);
 220         mpd_settings_free(settings);
 221
 222         return name;
 223 }
 224
 225 /**
 226  * This timer is installed when the connection to the MPD server is
 227  * broken.  It tries to recover by reconnecting periodically.
 228  */
 229 static gboolean
 230 timer_reconnect(gcc_unused gpointer data)
 231 {
 232         assert(mpdclient_is_dead(mpd));
 233
 234         reconnect_source_id = 0;
 235
 236         char *name = default_settings_name();
 237         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
 238                              name, get_key_names(CMD_QUIT, false));
 239         g_free(name);
 240         doupdate();
 241
 242         mpdclient_disconnect(mpd);
 243         mpdclient_connect(mpd, options.host, options.port,
 244                           options.timeout_ms,
 245                           options.password);
 246
 247         return FALSE;
 248 }
 249
 250 static void
 251 check_reconnect(void)
 252 {
 253         if (mpdclient_is_dead(mpd) && reconnect_source_id == 0)
 254                 /* reconnect when the connection is lost */
 255                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 256                                                     NULL);
 257 }
 258
 259 void
 260 mpdclient_connected_callback(void)
 261 {
 262         assert(reconnect_source_id == 0);
 263
 264 #ifndef NCMPC_MINI
 265         /* quit if mpd is pre 0.14 - song id not supported by mpd */
 266         struct mpd_connection *connection = mpdclient_get_connection(mpd);
 267         if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0) {
 268                 const unsigned *version =
 269                         mpd_connection_get_server_version(connection);
 270                 screen_status_printf(_("Error: MPD version %d.%d.%d is too old (%s needed)"),
 271                                      version[0], version[1], version[2],
 272                                      "0.16.0");
 273                 mpdclient_disconnect(mpd);
 274                 doupdate();
 275
 276                 /* try again after 30 seconds */
 277                 reconnect_source_id = g_timeout_add(30000,
 278                                                     timer_reconnect, NULL);
 279                 return;
 280         }
 281 #endif
 282
 283         screen_status_clear_message();
 284         doupdate();
 285
 286         /* update immediately */
 287         mpd->events = MPD_IDLE_ALL;
 288
 289         do_mpd_update();
 290
 291         auto_update_timer();
 292 }
 293
 294 void
 295 mpdclient_failed_callback(void)
 296 {
 297         assert(reconnect_source_id == 0);
 298
 299         /* try again in 5 seconds */
 300         reconnect_source_id = g_timeout_add(5000,
 301                                             timer_reconnect, NULL);
 302 }
 303
 304 void
 305 mpdclient_lost_callback(void)
 306 {
 307         assert(reconnect_source_id == 0);
 308
 309         screen_update(mpd);
 310
 311         reconnect_source_id = g_timeout_add(1000, timer_reconnect, NULL);
 312 }
 313
 314 /**
 315  * This function is called by the gidle.c library when MPD sends us an
 316  * idle event (or when the connection dies).
 317  */
 318 void
 319 mpdclient_idle_callback(gcc_unused enum mpd_idle events)
 320 {
 321 #ifndef NCMPC_MINI
 322         if (options.enable_xterm_title)
 323                 update_xterm_title();
 324 #endif
 325
 326         screen_update(mpd);
 327         auto_update_timer();
 328 }
 329
 330 static gboolean
 331 timer_mpd_update(gcc_unused gpointer data)
 332 {
 333         do_mpd_update();
 334
 335         if (should_enable_update_timer())
 336                 return true;
 337         else {
 338                 update_source_id = 0;
 339                 return false;
 340         }
 341 }
 342
 343 void begin_input_event(void)
 344 {
 345 }
 346
 347 void end_input_event(void)
 348 {
 349         screen_update(mpd);
 350         mpd->events = 0;
 351
 352         mpdclient_put_connection(mpd);
 353         check_reconnect();
 354         auto_update_timer();
 355 }
 356
 357 bool
 358 do_input_event(command_t cmd)
 359 {
 360         if (cmd == CMD_QUIT) {
 361                 g_main_loop_quit(main_loop);
 362                 return false;
 363         }
 364
 365         screen_cmd(mpd, cmd);
 366
 367         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
 368                 /* make sure we don't update the volume yet */
 369                 disable_update_timer();
 370
 371         return true;
 372 }
 373
 374 #ifndef NCMPC_MINI
 375 /**
 376  * Check the configured key bindings for errors, and display a status
 377  * message every 10 seconds.
 378  */
 379 static gboolean
 380 timer_check_key_bindings(gcc_unused gpointer data)
 381 {
 382         char buf[256];
 383
 384         if (check_key_bindings(NULL, buf, sizeof(buf))) {
 385                 /* no error: disable this timer for the rest of this
 386                    process */
 387                 check_key_bindings_source_id = 0;
 388                 return FALSE;
 389         }
 390
 391 #ifdef ENABLE_KEYDEF_SCREEN
 392         g_strchomp(buf);
 393         g_strlcat(buf, " (", sizeof(buf));
 394         /* to translators: a key was bound twice in the key editor,
 395            and this is a hint for the user what to press to correct
 396            that */
 397         char comment[64];
 398         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 399                    get_key_names(CMD_SCREEN_KEYDEF, false));
 400         g_strlcat(buf, comment, sizeof(buf));
 401         g_strlcat(buf, ")", sizeof(buf));
 402 #endif
 403
 404         screen_status_printf("%s", buf);
 405
 406         doupdate();
 407         return TRUE;
 408 }
 409 #endif
 410
 411 int
 412 main(int argc, const char *argv[])
 413 {
 414 #ifdef ENABLE_LOCALE
 415 #ifndef ENABLE_NLS
 416         gcc_unused
 417 #endif
 418         const char *charset = NULL;
 419         /* time and date formatting */
 420         setlocale(LC_TIME,"");
 421         /* care about sorting order etc */
 422         setlocale(LC_COLLATE,"");
 423         /* charset */
 424         setlocale(LC_CTYPE,"");
 425         /* initialize charset conversions */
 426         charset = charset_init();
 427
 428         /* initialize i18n support */
 429 #endif
 430
 431 #ifdef ENABLE_NLS
 432         setlocale(LC_MESSAGES, "");
 433         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 434 #ifdef ENABLE_LOCALE
 435         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 436 #endif
 437         textdomain(GETTEXT_PACKAGE);
 438 #endif
 439
 440         /* initialize options */
 441         options_init();
 442
 443         /* parse command line options - 1 pass get configuration files */
 444         options_parse(argc, argv);
 445
 446 #ifndef NCMPC_MINI
 447         /* read configuration */
 448         read_configuration();
 449
 450         /* check key bindings */
 451         check_key_bindings(NULL, NULL, 0);
 452 #endif
 453
 454         /* parse command line options - 2 pass */
 455         options_parse(argc, argv);
 456
 457 #ifndef WIN32
 458         /* setup signal behavior - SIGINT */
 459         struct sigaction act;
 460         sigemptyset(&act.sa_mask);
 461         act.sa_flags = 0;
 462         act.sa_handler = catch_sigint;
 463         if (sigaction(SIGINT, &act, NULL) < 0) {
 464                 perror("signal");
 465                 exit(EXIT_FAILURE);
 466         }
 467
 468         /* setup signal behavior - SIGTERM */
 469
 470         act.sa_handler = catch_sigint;
 471         if (sigaction(SIGTERM, &act, NULL) < 0) {
 472                 perror("sigaction()");
 473                 exit(EXIT_FAILURE);
 474         }
 475
 476         /* setup signal behavior - SIGCONT */
 477
 478         act.sa_handler = catch_sigcont;
 479         if (sigaction(SIGCONT, &act, NULL) < 0) {
 480                 perror("sigaction(SIGCONT)");
 481                 exit(EXIT_FAILURE);
 482         }
 483
 484         /* setup signal behaviour - SIGHUP*/
 485
 486         act.sa_handler = catch_sigint;
 487         if (sigaction(SIGHUP, &act, NULL) < 0) {
 488                 perror("sigaction(SIGHUP)");
 489                 exit(EXIT_FAILURE);
 490         }
 491
 492         /* setup SIGWINCH */
 493
 494         act.sa_flags = SA_RESTART;
 495         act.sa_handler = catch_sigwinch;
 496         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 497                 perror("sigaction(SIGWINCH)");
 498                 exit(EXIT_FAILURE);
 499         }
 500
 501         /* ignore SIGPIPE */
 502
 503         act.sa_handler = SIG_IGN;
 504         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 505                 perror("sigaction(SIGPIPE)");
 506                 exit(EXIT_FAILURE);
 507         }
 508 #endif
 509
 510         ncu_init();
 511
 512 #ifdef ENABLE_LYRICS_SCREEN
 513         lyrics_init();
 514 #endif
 515
 516         /* create mpdclient instance */
 517         mpd = mpdclient_new();
 518
 519         /* initialize curses */
 520         screen_init(mpd);
 521
 522         /* the main loop */
 523         main_loop = g_main_loop_new(NULL, FALSE);
 524
 525         /* watch out for keyboard input */
 526         keyboard_init();
 527
 528         /* watch out for lirc input */
 529         ncmpc_lirc_init();
 530
 531 #ifndef WIN32
 532         if (!pipe(sigwinch_pipes) &&
 533                 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
 534                 GIOChannel *sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
 535                 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
 536                 g_io_channel_unref(sigwinch_channel);
 537         }
 538         else {
 539                 perror("sigwinch pipe creation failed");
 540                 exit(EXIT_FAILURE);
 541         }
 542 #endif
 543
 544         /* attempt to connect */
 545         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 546
 547         auto_update_timer();
 548
 549 #ifndef NCMPC_MINI
 550         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 551 #endif
 552
 553         screen_paint(mpd);
 554
 555         g_main_loop_run(main_loop);
 556         g_main_loop_unref(main_loop);
 557
 558         /* cleanup */
 559
 560         cancel_seek_timer();
 561
 562         disable_update_timer();
 563
 564         if (reconnect_source_id != 0)
 565                 g_source_remove(reconnect_source_id);
 566
 567 #ifndef NCMPC_MINI
 568         if (check_key_bindings_source_id != 0)
 569                 g_source_remove(check_key_bindings_source_id);
 570 #endif
 571
 572         close(sigwinch_pipes[0]);
 573         close(sigwinch_pipes[1]);
 574
 575         ncmpc_lirc_deinit();
 576
 577         screen_exit();
 578 #ifndef NCMPC_MINI
 579         set_xterm_title("");
 580 #endif
 581         printf("\n");
 582
 583         mpdclient_free(mpd);
 584
 585 #ifdef ENABLE_LYRICS_SCREEN
 586         lyrics_deinit();
 587 #endif
 588
 589         ncu_deinit();
 590         options_deinit();
 591
 592         return 0;
 593 }