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