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 void
 107 sigstop(void)
 108 {
 109         def_prog_mode();  /* save the tty modes */
 110         endwin();         /* end curses mode temporarily */
 111         kill(0, SIGSTOP); /* issue SIGSTOP */
 112 }
 113
 114 static gboolean
 115 sigwinch_event(gcc_unused GIOChannel *source,
 116                gcc_unused GIOCondition condition, gcc_unused gpointer data)
 117 {
 118         char ignoreme[64];
 119         if (1 > read(sigwinch_pipes[0], ignoreme, 64))
 120                 exit(EXIT_FAILURE);
 121
 122         endwin();
 123         refresh();
 124         screen_resize(mpd);
 125
 126         return TRUE;
 127 }
 128
 129 static void
 130 catch_sigwinch(gcc_unused int sig)
 131 {
 132         if (1 != write(sigwinch_pipes[1], "", 1))
 133                 exit(EXIT_FAILURE);
 134 }
 135 #endif /* WIN32 */
 136
 137 static gboolean
 138 timer_mpd_update(gpointer data);
 139
 140 static void
 141 enable_update_timer(void)
 142 {
 143         if (update_source_id != 0)
 144                 return;
 145
 146         update_source_id = g_timeout_add(update_interval,
 147                                          timer_mpd_update, NULL);
 148 }
 149
 150 static void
 151 disable_update_timer(void)
 152 {
 153         if (update_source_id == 0)
 154                 return;
 155
 156         g_source_remove(update_source_id);
 157         update_source_id = 0;
 158 }
 159
 160 static bool
 161 should_enable_update_timer(void)
 162 {
 163         return mpd->playing
 164 #ifndef NCMPC_MINI
 165                 || options.display_time
 166 #endif
 167                 ;
 168 }
 169
 170 static void
 171 auto_update_timer(void)
 172 {
 173         if (should_enable_update_timer())
 174                 enable_update_timer();
 175         else
 176                 disable_update_timer();
 177 }
 178
 179 static void
 180 check_reconnect(void);
 181
 182 static void
 183 do_mpd_update(void)
 184 {
 185         if (mpdclient_is_connected(mpd) &&
 186             (mpd->events != 0 || mpd->playing))
 187                 mpdclient_update(mpd);
 188
 189 #ifndef NCMPC_MINI
 190         if (options.enable_xterm_title)
 191                 update_xterm_title();
 192 #endif
 193
 194         screen_update(mpd);
 195         mpd->events = 0;
 196
 197         mpdclient_put_connection(mpd);
 198         check_reconnect();
 199 }
 200
 201 static char *
 202 settings_name(const struct mpd_settings *settings)
 203 {
 204         const char *host = mpd_settings_get_host(settings);
 205         if (host == NULL)
 206                 host = _("unknown");
 207
 208         if (host[0] == '/')
 209                 return g_strdup(host);
 210
 211         unsigned port = mpd_settings_get_port(settings);
 212         if (port == 0 || port == 6600)
 213                 return g_strdup(host);
 214
 215         return g_strdup_printf("%s:%u", host, port);
 216 }
 217
 218 static char *
 219 default_settings_name(void)
 220 {
 221         struct mpd_settings *settings =
 222                 mpd_settings_new(options.host, options.port, 0,
 223                                  NULL, options.password);
 224         if (settings == NULL)
 225                 return g_strdup(_("unknown"));
 226
 227         char *name = settings_name(settings);
 228         mpd_settings_free(settings);
 229
 230         return name;
 231 }
 232
 233 /**
 234  * This timer is installed when the connection to the MPD server is
 235  * broken.  It tries to recover by reconnecting periodically.
 236  */
 237 static gboolean
 238 timer_reconnect(gcc_unused gpointer data)
 239 {
 240         assert(mpdclient_is_dead(mpd));
 241
 242         reconnect_source_id = 0;
 243
 244         char *name = default_settings_name();
 245         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
 246                              name, get_key_names(CMD_QUIT, false));
 247         g_free(name);
 248         doupdate();
 249
 250         mpdclient_disconnect(mpd);
 251         mpdclient_connect(mpd, options.host, options.port,
 252                           options.timeout_ms,
 253                           options.password);
 254
 255         return FALSE;
 256 }
 257
 258 static void
 259 check_reconnect(void)
 260 {
 261         if (mpdclient_is_dead(mpd) && reconnect_source_id == 0)
 262                 /* reconnect when the connection is lost */
 263                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 264                                                     NULL);
 265 }
 266
 267 void
 268 mpdclient_connected_callback(void)
 269 {
 270         assert(reconnect_source_id == 0);
 271
 272 #ifndef NCMPC_MINI
 273         /* quit if mpd is pre 0.14 - song id not supported by mpd */
 274         struct mpd_connection *connection = mpdclient_get_connection(mpd);
 275         if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0) {
 276                 const unsigned *version =
 277                         mpd_connection_get_server_version(connection);
 278                 screen_status_printf(_("Error: MPD version %d.%d.%d is too old (%s needed)"),
 279                                      version[0], version[1], version[2],
 280                                      "0.16.0");
 281                 mpdclient_disconnect(mpd);
 282                 doupdate();
 283
 284                 /* try again after 30 seconds */
 285                 reconnect_source_id = g_timeout_add(30000,
 286                                                     timer_reconnect, NULL);
 287                 return;
 288         }
 289 #endif
 290
 291         screen_status_clear_message();
 292         doupdate();
 293
 294         /* update immediately */
 295         mpd->events = MPD_IDLE_ALL;
 296
 297         do_mpd_update();
 298
 299         auto_update_timer();
 300 }
 301
 302 void
 303 mpdclient_failed_callback(void)
 304 {
 305         assert(reconnect_source_id == 0);
 306
 307         /* try again in 5 seconds */
 308         reconnect_source_id = g_timeout_add(5000,
 309                                             timer_reconnect, NULL);
 310 }
 311
 312 void
 313 mpdclient_lost_callback(void)
 314 {
 315         assert(reconnect_source_id == 0);
 316
 317         screen_update(mpd);
 318
 319         reconnect_source_id = g_timeout_add(1000, timer_reconnect, NULL);
 320 }
 321
 322 /**
 323  * This function is called by the gidle.c library when MPD sends us an
 324  * idle event (or when the connection dies).
 325  */
 326 void
 327 mpdclient_idle_callback(gcc_unused enum mpd_idle events)
 328 {
 329 #ifndef NCMPC_MINI
 330         if (options.enable_xterm_title)
 331                 update_xterm_title();
 332 #endif
 333
 334         screen_update(mpd);
 335         auto_update_timer();
 336 }
 337
 338 static gboolean
 339 timer_mpd_update(gcc_unused gpointer data)
 340 {
 341         do_mpd_update();
 342
 343         if (should_enable_update_timer())
 344                 return true;
 345         else {
 346                 update_source_id = 0;
 347                 return false;
 348         }
 349 }
 350
 351 void begin_input_event(void)
 352 {
 353 }
 354
 355 void end_input_event(void)
 356 {
 357         screen_update(mpd);
 358         mpd->events = 0;
 359
 360         mpdclient_put_connection(mpd);
 361         check_reconnect();
 362         auto_update_timer();
 363 }
 364
 365 bool
 366 do_input_event(command_t cmd)
 367 {
 368         if (cmd == CMD_QUIT) {
 369                 g_main_loop_quit(main_loop);
 370                 return false;
 371         }
 372
 373         screen_cmd(mpd, cmd);
 374
 375         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
 376                 /* make sure we don't update the volume yet */
 377                 disable_update_timer();
 378
 379         return true;
 380 }
 381
 382 #ifndef NCMPC_MINI
 383 /**
 384  * Check the configured key bindings for errors, and display a status
 385  * message every 10 seconds.
 386  */
 387 static gboolean
 388 timer_check_key_bindings(gcc_unused gpointer data)
 389 {
 390         char buf[256];
 391
 392         if (check_key_bindings(NULL, buf, sizeof(buf))) {
 393                 /* no error: disable this timer for the rest of this
 394                    process */
 395                 check_key_bindings_source_id = 0;
 396                 return FALSE;
 397         }
 398
 399 #ifdef ENABLE_KEYDEF_SCREEN
 400         g_strchomp(buf);
 401         g_strlcat(buf, " (", sizeof(buf));
 402         /* to translators: a key was bound twice in the key editor,
 403            and this is a hint for the user what to press to correct
 404            that */
 405         char comment[64];
 406         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 407                    get_key_names(CMD_SCREEN_KEYDEF, false));
 408         g_strlcat(buf, comment, sizeof(buf));
 409         g_strlcat(buf, ")", sizeof(buf));
 410 #endif
 411
 412         screen_status_printf("%s", buf);
 413
 414         doupdate();
 415         return TRUE;
 416 }
 417 #endif
 418
 419 int
 420 main(int argc, const char *argv[])
 421 {
 422 #ifdef ENABLE_LOCALE
 423 #ifndef ENABLE_NLS
 424         gcc_unused
 425 #endif
 426         const char *charset = NULL;
 427         /* time and date formatting */
 428         setlocale(LC_TIME,"");
 429         /* care about sorting order etc */
 430         setlocale(LC_COLLATE,"");
 431         /* charset */
 432         setlocale(LC_CTYPE,"");
 433         /* initialize charset conversions */
 434         charset = charset_init();
 435
 436         /* initialize i18n support */
 437 #endif
 438
 439 #ifdef ENABLE_NLS
 440         setlocale(LC_MESSAGES, "");
 441         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 442 #ifdef ENABLE_LOCALE
 443         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 444 #endif
 445         textdomain(GETTEXT_PACKAGE);
 446 #endif
 447
 448         /* initialize options */
 449         options_init();
 450
 451         /* parse command line options - 1 pass get configuration files */
 452         options_parse(argc, argv);
 453
 454 #ifndef NCMPC_MINI
 455         /* read configuration */
 456         read_configuration();
 457
 458         /* check key bindings */
 459         check_key_bindings(NULL, NULL, 0);
 460 #endif
 461
 462         /* parse command line options - 2 pass */
 463         options_parse(argc, argv);
 464
 465 #ifndef WIN32
 466         /* setup signal behavior - SIGINT */
 467         struct sigaction act;
 468         sigemptyset(&act.sa_mask);
 469         act.sa_flags = 0;
 470         act.sa_handler = catch_sigint;
 471         if (sigaction(SIGINT, &act, NULL) < 0) {
 472                 perror("signal");
 473                 exit(EXIT_FAILURE);
 474         }
 475
 476         /* setup signal behavior - SIGTERM */
 477
 478         act.sa_handler = catch_sigint;
 479         if (sigaction(SIGTERM, &act, NULL) < 0) {
 480                 perror("sigaction()");
 481                 exit(EXIT_FAILURE);
 482         }
 483
 484         /* setup signal behavior - SIGCONT */
 485
 486         act.sa_handler = catch_sigcont;
 487         if (sigaction(SIGCONT, &act, NULL) < 0) {
 488                 perror("sigaction(SIGCONT)");
 489                 exit(EXIT_FAILURE);
 490         }
 491
 492         /* setup signal behaviour - SIGHUP*/
 493
 494         act.sa_handler = catch_sigint;
 495         if (sigaction(SIGHUP, &act, NULL) < 0) {
 496                 perror("sigaction(SIGHUP)");
 497                 exit(EXIT_FAILURE);
 498         }
 499
 500         /* setup SIGWINCH */
 501
 502         act.sa_flags = SA_RESTART;
 503         act.sa_handler = catch_sigwinch;
 504         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 505                 perror("sigaction(SIGWINCH)");
 506                 exit(EXIT_FAILURE);
 507         }
 508
 509         /* ignore SIGPIPE */
 510
 511         act.sa_handler = SIG_IGN;
 512         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 513                 perror("sigaction(SIGPIPE)");
 514                 exit(EXIT_FAILURE);
 515         }
 516 #endif
 517
 518         ncu_init();
 519
 520 #ifdef ENABLE_LYRICS_SCREEN
 521         lyrics_init();
 522 #endif
 523
 524         /* create mpdclient instance */
 525         mpd = mpdclient_new();
 526
 527         /* initialize curses */
 528         screen_init(mpd);
 529
 530         /* the main loop */
 531         main_loop = g_main_loop_new(NULL, FALSE);
 532
 533         /* watch out for keyboard input */
 534         keyboard_init();
 535
 536         /* watch out for lirc input */
 537         ncmpc_lirc_init();
 538
 539 #ifndef WIN32
 540         if (!pipe(sigwinch_pipes) &&
 541                 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
 542                 GIOChannel *sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
 543                 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
 544                 g_io_channel_unref(sigwinch_channel);
 545         }
 546         else {
 547                 perror("sigwinch pipe creation failed");
 548                 exit(EXIT_FAILURE);
 549         }
 550 #endif
 551
 552         /* attempt to connect */
 553         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 554
 555         auto_update_timer();
 556
 557 #ifndef NCMPC_MINI
 558         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 559 #endif
 560
 561         screen_paint(mpd);
 562
 563         g_main_loop_run(main_loop);
 564         g_main_loop_unref(main_loop);
 565
 566         /* cleanup */
 567
 568         cancel_seek_timer();
 569
 570         disable_update_timer();
 571
 572         if (reconnect_source_id != 0)
 573                 g_source_remove(reconnect_source_id);
 574
 575 #ifndef NCMPC_MINI
 576         if (check_key_bindings_source_id != 0)
 577                 g_source_remove(check_key_bindings_source_id);
 578 #endif
 579
 580         close(sigwinch_pipes[0]);
 581         close(sigwinch_pipes[1]);
 582
 583         ncmpc_lirc_deinit();
 584
 585         screen_exit();
 586 #ifndef NCMPC_MINI
 587         set_xterm_title("");
 588 #endif
 589         printf("\n");
 590
 591         mpdclient_free(mpd);
 592
 593 #ifdef ENABLE_LYRICS_SCREEN
 594         lyrics_deinit();
 595 #endif
 596
 597         ncu_deinit();
 598         options_deinit();
 599
 600         return 0;
 601 }