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