1 /* ncmpc (Ncurses MPD Client)
2 * (c) 2004-2010 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 */
20 #include "config.h"
21 #include "ncmpc.h"
22 #include "mpdclient.h"
23 #include "gidle.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"
35 #ifndef NCMPC_MINI
36 #include "conf.h"
37 #endif
39 #ifdef ENABLE_LYRICS_SCREEN
40 #include "lyrics.h"
41 #endif
43 #ifdef ENABLE_LIRC
44 #include "lirc.h"
45 #endif
47 #include <mpd/client.h>
49 #include <stdlib.h>
50 #include <unistd.h>
51 #include <fcntl.h>
52 #include <signal.h>
53 #include <string.h>
55 #ifdef ENABLE_LOCALE
56 #include <locale.h>
57 #endif
59 /* time between mpd updates [ms] */
60 static const guint update_interval = 500;
62 #define BUFSIZE 1024
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];
69 #ifndef NCMPC_MINI
70 static guint check_key_bindings_source_id;
71 #endif
73 #ifndef NCMPC_MINI
74 static void
75 update_xterm_title(void)
76 {
77 static char title[BUFSIZE];
78 char tmp[BUFSIZE];
79 struct mpd_status *status = NULL;
80 const struct mpd_song *song = NULL;
82 if (mpd) {
83 status = mpd->status;
84 song = mpd->song;
85 }
87 if (options.xterm_title_format && status && song &&
88 mpd_status_get_state(status) == MPD_STATE_PLAY)
89 strfsong(tmp, BUFSIZE, options.xterm_title_format, song);
90 else
91 g_strlcpy(tmp, PACKAGE " version " VERSION, BUFSIZE);
93 if (strncmp(title, tmp, BUFSIZE)) {
94 g_strlcpy(title, tmp, BUFSIZE);
95 set_xterm_title("%s", title);
96 }
97 }
98 #endif
100 static void
101 exit_and_cleanup(void)
102 {
103 screen_exit();
104 #ifndef NCMPC_MINI
105 set_xterm_title("");
106 #endif
107 printf("\n");
109 if (mpd) {
110 mpdclient_disconnect(mpd);
111 mpdclient_free(mpd);
112 }
113 }
115 #ifndef WIN32
116 static void
117 catch_sigint(gcc_unused int sig)
118 {
119 g_main_loop_quit(main_loop);
120 }
123 static void
124 catch_sigcont(gcc_unused int sig)
125 {
126 char irrelevant = 'a';
127 if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
128 exit(EXIT_FAILURE);
129 }
131 void
132 sigstop(void)
133 {
134 def_prog_mode(); /* save the tty modes */
135 endwin(); /* end curses mode temporarily */
136 kill(0, SIGSTOP); /* issue SIGSTOP */
137 }
139 static gboolean
140 sigwinch_event(gcc_unused GIOChannel *source,
141 gcc_unused GIOCondition condition, gcc_unused gpointer data)
142 {
143 char ignoreme[64];
144 if (1 > read(sigwinch_pipes[0], ignoreme, 64))
145 exit(EXIT_FAILURE);
147 endwin();
148 refresh();
149 screen_resize(mpd);
151 return TRUE;
152 }
154 static void
155 catch_sigwinch(gcc_unused int sig)
156 {
157 char irrelevant = 'a';
158 if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
159 exit(EXIT_FAILURE);
160 }
161 #endif /* WIN32 */
163 static void
164 idle_callback(enum mpd_error error,
165 gcc_unused enum mpd_server_error server_error,
166 const char *message, enum mpd_idle events,
167 gcc_unused void *ctx);
169 static gboolean
170 timer_mpd_update(gpointer data);
172 static void
173 enable_update_timer(void)
174 {
175 if (update_source_id != 0)
176 return;
178 update_source_id = g_timeout_add(update_interval,
179 timer_mpd_update, NULL);
180 }
182 static void
183 disable_update_timer(void)
184 {
185 if (update_source_id == 0)
186 return;
188 g_source_remove(update_source_id);
189 update_source_id = 0;
190 }
192 static bool
193 should_enable_update_timer(void)
194 {
195 return (mpdclient_is_connected(mpd) &&
196 (mpd->source == NULL || /* "idle" not supported */
197 (mpd->status != NULL &&
198 mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
199 #ifndef NCMPC_MINI
200 || options.display_time
201 #endif
202 ;
203 }
205 static void
206 auto_update_timer(void)
207 {
208 if (should_enable_update_timer())
209 enable_update_timer();
210 else
211 disable_update_timer();
212 }
214 static void
215 check_reconnect(void);
217 static void
218 do_mpd_update(void)
219 {
220 if (mpdclient_is_connected(mpd) &&
221 (mpd->source == NULL || mpd->events != 0 ||
222 (mpd->status != NULL &&
223 mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
224 mpdclient_update(mpd);
226 #ifndef NCMPC_MINI
227 if (options.enable_xterm_title)
228 update_xterm_title();
229 #endif
231 screen_update(mpd);
232 mpd->events = 0;
234 mpdclient_put_connection(mpd);
235 check_reconnect();
236 }
238 #if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
240 static char *
241 settings_name(const struct mpd_settings *settings)
242 {
243 const char *host = mpd_settings_get_host(settings);
244 if (host == NULL)
245 host = _("unknown");
247 if (host[0] == '/')
248 return g_strdup(host);
250 unsigned port = mpd_settings_get_port(settings);
251 if (port == 0 || port == 6600)
252 return g_strdup(host);
254 return g_strdup_printf("%s:%u", host, port);
255 }
257 #endif
259 static char *
260 default_settings_name(void)
261 {
262 #if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
263 struct mpd_settings *settings =
264 mpd_settings_new(options.host, options.port, 0,
265 NULL, options.password);
266 if (settings == NULL)
267 return g_strdup(_("unknown"));
269 char *name = settings_name(settings);
270 mpd_settings_free(settings);
272 return name;
273 #else
274 /*
275 * localhost is actually not correct, we only know that
276 * mpd_connection_new() has connected to the "default host".
277 */
278 const char *name = options.host ?: "localhost";
279 return g_strdup(name);
280 #endif
281 }
283 /**
284 * This timer is installed when the connection to the MPD server is
285 * broken. It tries to recover by reconnecting periodically.
286 */
287 static gboolean
288 timer_reconnect(gcc_unused gpointer data)
289 {
290 bool success;
291 struct mpd_connection *connection;
293 assert(!mpdclient_is_connected(mpd));
295 reconnect_source_id = 0;
297 char *name = default_settings_name();
298 screen_status_printf(_("Connecting to %s... [Press %s to abort]"),
299 name, get_key_names(CMD_QUIT, false));
300 g_free(name);
301 doupdate();
303 mpdclient_disconnect(mpd);
304 success = mpdclient_connect(mpd,
305 options.host, options.port,
306 options.timeout_ms,
307 options.password);
308 if (!success) {
309 /* try again in 5 seconds */
310 reconnect_source_id = g_timeout_add(5000,
311 timer_reconnect, NULL);
312 return FALSE;
313 }
315 connection = mpdclient_get_connection(mpd);
317 #ifndef NCMPC_MINI
318 /* quit if mpd is pre 0.14 - song id not supported by mpd */
319 if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0) {
320 const unsigned *version =
321 mpd_connection_get_server_version(connection);
322 screen_status_printf(_("Error: MPD version %d.%d.%d is to old (%s needed)"),
323 version[0], version[1], version[2],
324 "0.16.0");
325 mpdclient_disconnect(mpd);
326 doupdate();
328 /* try again after 30 seconds */
329 reconnect_source_id = g_timeout_add(30000,
330 timer_reconnect, NULL);
331 return FALSE;
332 }
333 #endif
335 mpd->source = mpd_glib_new(connection,
336 idle_callback, mpd);
338 screen_status_clear_message();
339 doupdate();
341 /* update immediately */
342 mpd->events = MPD_IDLE_ALL;
344 do_mpd_update();
346 auto_update_timer();
348 return FALSE;
349 }
351 static void
352 check_reconnect(void)
353 {
354 if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
355 /* reconnect when the connection is lost */
356 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
357 NULL);
358 }
360 /**
361 * This function is called by the gidle.c library when MPD sends us an
362 * idle event (or when the connection dies).
363 */
364 static void
365 idle_callback(enum mpd_error error, enum mpd_server_error server_error,
366 const char *message, enum mpd_idle events,
367 void *ctx)
368 {
369 struct mpdclient *c = ctx;
371 c->idle = false;
373 assert(mpdclient_is_connected(c));
375 if (error != MPD_ERROR_SUCCESS) {
376 char *allocated;
378 if (error == MPD_ERROR_SERVER &&
379 server_error == MPD_SERVER_ERROR_UNKNOWN_CMD) {
380 /* the "idle" command is not supported - fall
381 back to timer based polling */
382 mpd_glib_free(c->source);
383 c->source = NULL;
384 auto_update_timer();
385 return;
386 }
388 if (error == MPD_ERROR_SERVER)
389 message = allocated = utf8_to_locale(message);
390 else
391 allocated = NULL;
392 screen_status_message(message);
393 g_free(allocated);
394 screen_bell();
395 doupdate();
397 mpdclient_disconnect(c);
398 screen_update(mpd);
399 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
400 NULL);
401 return;
402 }
404 c->events |= events;
405 mpdclient_update(c);
407 #ifndef NCMPC_MINI
408 if (options.enable_xterm_title)
409 update_xterm_title();
410 #endif
412 screen_update(mpd);
413 c->events = 0;
415 mpdclient_put_connection(c);
416 check_reconnect();
417 auto_update_timer();
418 }
420 static gboolean
421 timer_mpd_update(gcc_unused gpointer data)
422 {
423 do_mpd_update();
425 if (should_enable_update_timer())
426 return true;
427 else {
428 update_source_id = 0;
429 return false;
430 }
431 }
433 void begin_input_event(void)
434 {
435 }
437 void end_input_event(void)
438 {
439 screen_update(mpd);
440 mpd->events = 0;
442 mpdclient_put_connection(mpd);
443 check_reconnect();
444 auto_update_timer();
445 }
447 int do_input_event(command_t cmd)
448 {
449 if (cmd == CMD_QUIT) {
450 g_main_loop_quit(main_loop);
451 return -1;
452 }
454 screen_cmd(mpd, cmd);
456 if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
457 /* make sure we don't update the volume yet */
458 disable_update_timer();
460 return 0;
461 }
463 static gboolean
464 keyboard_event(gcc_unused GIOChannel *source,
465 gcc_unused GIOCondition condition,
466 gcc_unused gpointer data)
467 {
468 command_t cmd;
470 begin_input_event();
472 if ((cmd=get_keyboard_command()) != CMD_NONE)
473 if (do_input_event(cmd) != 0)
474 return FALSE;
476 end_input_event();
477 return TRUE;
478 }
480 #ifndef NCMPC_MINI
481 /**
482 * Check the configured key bindings for errors, and display a status
483 * message every 10 seconds.
484 */
485 static gboolean
486 timer_check_key_bindings(gcc_unused gpointer data)
487 {
488 char buf[256];
489 #ifdef ENABLE_KEYDEF_SCREEN
490 char comment[64];
491 #endif
492 gboolean key_error;
494 key_error = check_key_bindings(NULL, buf, sizeof(buf));
495 if (!key_error) {
496 /* no error: disable this timer for the rest of this
497 process */
498 check_key_bindings_source_id = 0;
499 return FALSE;
500 }
502 #ifdef ENABLE_KEYDEF_SCREEN
503 g_strchomp(buf);
504 g_strlcat(buf, " (", sizeof(buf));
505 /* to translators: a key was bound twice in the key editor,
506 and this is a hint for the user what to press to correct
507 that */
508 g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
509 get_key_names(CMD_SCREEN_KEYDEF, false));
510 g_strlcat(buf, comment, sizeof(buf));
511 g_strlcat(buf, ")", sizeof(buf));
512 #endif
514 screen_status_printf("%s", buf);
516 doupdate();
517 return TRUE;
518 }
519 #endif
521 int
522 main(int argc, const char *argv[])
523 {
524 #ifndef WIN32
525 struct sigaction act;
526 #endif
527 #ifdef ENABLE_LOCALE
528 #ifndef ENABLE_NLS
529 gcc_unused
530 #endif
531 const char *charset = NULL;
532 #endif
533 GIOChannel *keyboard_channel;
534 #ifdef ENABLE_LIRC
535 int lirc_socket;
536 GIOChannel *lirc_channel = NULL;
537 #endif
538 GIOChannel *sigwinch_channel = NULL;
540 #ifdef ENABLE_LOCALE
541 /* time and date formatting */
542 setlocale(LC_TIME,"");
543 /* care about sorting order etc */
544 setlocale(LC_COLLATE,"");
545 /* charset */
546 setlocale(LC_CTYPE,"");
547 /* initialize charset conversions */
548 charset = charset_init();
550 /* initialize i18n support */
551 #endif
553 #ifdef ENABLE_NLS
554 setlocale(LC_MESSAGES, "");
555 bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
556 #ifdef ENABLE_LOCALE
557 bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
558 #endif
559 textdomain(GETTEXT_PACKAGE);
560 #endif
562 /* initialize options */
563 options_init();
565 /* parse command line options - 1 pass get configuration files */
566 options_parse(argc, argv);
568 #ifndef NCMPC_MINI
569 /* read configuration */
570 read_configuration();
572 /* check key bindings */
573 check_key_bindings(NULL, NULL, 0);
574 #endif
576 /* parse command line options - 2 pass */
577 options_parse(argc, argv);
579 #ifndef WIN32
580 /* setup signal behavior - SIGINT */
581 sigemptyset(&act.sa_mask);
582 act.sa_flags = 0;
583 act.sa_handler = catch_sigint;
584 if (sigaction(SIGINT, &act, NULL) < 0) {
585 perror("signal");
586 exit(EXIT_FAILURE);
587 }
589 /* setup signal behavior - SIGTERM */
591 act.sa_handler = catch_sigint;
592 if (sigaction(SIGTERM, &act, NULL) < 0) {
593 perror("sigaction()");
594 exit(EXIT_FAILURE);
595 }
597 /* setup signal behavior - SIGCONT */
599 act.sa_handler = catch_sigcont;
600 if (sigaction(SIGCONT, &act, NULL) < 0) {
601 perror("sigaction(SIGCONT)");
602 exit(EXIT_FAILURE);
603 }
605 /* setup signal behaviour - SIGHUP*/
607 act.sa_handler = catch_sigint;
608 if (sigaction(SIGHUP, &act, NULL) < 0) {
609 perror("sigaction(SIGHUP)");
610 exit(EXIT_FAILURE);
611 }
613 /* setup SIGWINCH */
615 act.sa_flags = SA_RESTART;
616 act.sa_handler = catch_sigwinch;
617 if (sigaction(SIGWINCH, &act, NULL) < 0) {
618 perror("sigaction(SIGWINCH)");
619 exit(EXIT_FAILURE);
620 }
622 /* ignore SIGPIPE */
624 act.sa_handler = SIG_IGN;
625 if (sigaction(SIGPIPE, &act, NULL) < 0) {
626 perror("sigaction(SIGPIPE)");
627 exit(EXIT_FAILURE);
628 }
629 #endif
631 ncu_init();
633 #ifdef ENABLE_LYRICS_SCREEN
634 lyrics_init();
635 #endif
637 /* create mpdclient instance */
638 mpd = mpdclient_new();
640 /* initialize curses */
641 screen_init(mpd);
643 /* the main loop */
644 main_loop = g_main_loop_new(NULL, FALSE);
646 /* watch out for keyboard input */
647 keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
648 g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
650 #ifdef ENABLE_LIRC
651 /* watch out for lirc input */
652 lirc_socket = ncmpc_lirc_open();
653 if (lirc_socket >= 0) {
654 lirc_channel = g_io_channel_unix_new(lirc_socket);
655 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
656 }
657 #endif
659 #ifndef WIN32
660 if (!pipe(sigwinch_pipes) &&
661 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
662 sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
663 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
664 }
665 else {
666 perror("sigwinch pipe creation failed");
667 exit(EXIT_FAILURE);
668 }
669 #endif
671 /* attempt to connect */
672 reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
674 auto_update_timer();
676 #ifndef NCMPC_MINI
677 check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
678 #endif
680 screen_paint(mpd);
682 g_main_loop_run(main_loop);
684 /* cleanup */
686 cancel_seek_timer();
688 disable_update_timer();
690 if (reconnect_source_id != 0)
691 g_source_remove(reconnect_source_id);
693 #ifndef NCMPC_MINI
694 if (check_key_bindings_source_id != 0)
695 g_source_remove(check_key_bindings_source_id);
696 #endif
698 g_main_loop_unref(main_loop);
699 g_io_channel_unref(keyboard_channel);
700 g_io_channel_unref(sigwinch_channel);
701 close(sigwinch_pipes[0]);
702 close(sigwinch_pipes[1]);
704 #ifdef ENABLE_LIRC
705 if (lirc_socket >= 0)
706 g_io_channel_unref(lirc_channel);
707 ncmpc_lirc_close();
708 #endif
710 exit_and_cleanup();
712 #ifdef ENABLE_LYRICS_SCREEN
713 lyrics_deinit();
714 #endif
716 ncu_deinit();
717 options_deinit();
719 return 0;
720 }