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 struct mpd_status *status = NULL;
78 const struct mpd_song *song = NULL;
79 if (mpd) {
80 status = mpd->status;
81 song = mpd->song;
82 }
84 char tmp[BUFSIZE];
85 if (options.xterm_title_format && status && song &&
86 mpd_status_get_state(status) == MPD_STATE_PLAY)
87 strfsong(tmp, BUFSIZE, options.xterm_title_format, song);
88 else
89 g_strlcpy(tmp, PACKAGE " version " VERSION, BUFSIZE);
91 static char title[BUFSIZE];
92 if (strncmp(title, tmp, BUFSIZE)) {
93 g_strlcpy(title, tmp, BUFSIZE);
94 set_xterm_title("%s", title);
95 }
96 }
97 #endif
99 static void
100 exit_and_cleanup(void)
101 {
102 screen_exit();
103 #ifndef NCMPC_MINI
104 set_xterm_title("");
105 #endif
106 printf("\n");
108 if (mpd) {
109 mpdclient_disconnect(mpd);
110 mpdclient_free(mpd);
111 }
112 }
114 #ifndef WIN32
115 static void
116 catch_sigint(gcc_unused int sig)
117 {
118 g_main_loop_quit(main_loop);
119 }
122 static void
123 catch_sigcont(gcc_unused int sig)
124 {
125 char irrelevant = 'a';
126 if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
127 exit(EXIT_FAILURE);
128 }
130 void
131 sigstop(void)
132 {
133 def_prog_mode(); /* save the tty modes */
134 endwin(); /* end curses mode temporarily */
135 kill(0, SIGSTOP); /* issue SIGSTOP */
136 }
138 static gboolean
139 sigwinch_event(gcc_unused GIOChannel *source,
140 gcc_unused GIOCondition condition, gcc_unused gpointer data)
141 {
142 char ignoreme[64];
143 if (1 > read(sigwinch_pipes[0], ignoreme, 64))
144 exit(EXIT_FAILURE);
146 endwin();
147 refresh();
148 screen_resize(mpd);
150 return TRUE;
151 }
153 static void
154 catch_sigwinch(gcc_unused int sig)
155 {
156 char irrelevant = 'a';
157 if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
158 exit(EXIT_FAILURE);
159 }
160 #endif /* WIN32 */
162 static void
163 idle_callback(enum mpd_error error,
164 gcc_unused enum mpd_server_error server_error,
165 const char *message, enum mpd_idle events,
166 gcc_unused void *ctx);
168 static gboolean
169 timer_mpd_update(gpointer data);
171 static void
172 enable_update_timer(void)
173 {
174 if (update_source_id != 0)
175 return;
177 update_source_id = g_timeout_add(update_interval,
178 timer_mpd_update, NULL);
179 }
181 static void
182 disable_update_timer(void)
183 {
184 if (update_source_id == 0)
185 return;
187 g_source_remove(update_source_id);
188 update_source_id = 0;
189 }
191 static bool
192 should_enable_update_timer(void)
193 {
194 return (mpdclient_is_connected(mpd) &&
195 (mpd->source == NULL || /* "idle" not supported */
196 (mpd->status != NULL &&
197 mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
198 #ifndef NCMPC_MINI
199 || options.display_time
200 #endif
201 ;
202 }
204 static void
205 auto_update_timer(void)
206 {
207 if (should_enable_update_timer())
208 enable_update_timer();
209 else
210 disable_update_timer();
211 }
213 static void
214 check_reconnect(void);
216 static void
217 do_mpd_update(void)
218 {
219 if (mpdclient_is_connected(mpd) &&
220 (mpd->source == NULL || mpd->events != 0 ||
221 (mpd->status != NULL &&
222 mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
223 mpdclient_update(mpd);
225 #ifndef NCMPC_MINI
226 if (options.enable_xterm_title)
227 update_xterm_title();
228 #endif
230 screen_update(mpd);
231 mpd->events = 0;
233 mpdclient_put_connection(mpd);
234 check_reconnect();
235 }
237 static char *
238 settings_name(const struct mpd_settings *settings)
239 {
240 const char *host = mpd_settings_get_host(settings);
241 if (host == NULL)
242 host = _("unknown");
244 if (host[0] == '/')
245 return g_strdup(host);
247 unsigned port = mpd_settings_get_port(settings);
248 if (port == 0 || port == 6600)
249 return g_strdup(host);
251 return g_strdup_printf("%s:%u", host, port);
252 }
254 static char *
255 default_settings_name(void)
256 {
257 struct mpd_settings *settings =
258 mpd_settings_new(options.host, options.port, 0,
259 NULL, options.password);
260 if (settings == NULL)
261 return g_strdup(_("unknown"));
263 char *name = settings_name(settings);
264 mpd_settings_free(settings);
266 return name;
267 }
269 /**
270 * This timer is installed when the connection to the MPD server is
271 * broken. It tries to recover by reconnecting periodically.
272 */
273 static gboolean
274 timer_reconnect(gcc_unused gpointer data)
275 {
276 assert(!mpdclient_is_connected(mpd));
278 reconnect_source_id = 0;
280 char *name = default_settings_name();
281 screen_status_printf(_("Connecting to %s... [Press %s to abort]"),
282 name, get_key_names(CMD_QUIT, false));
283 g_free(name);
284 doupdate();
286 mpdclient_disconnect(mpd);
287 if (!mpdclient_connect(mpd, options.host, options.port,
288 options.timeout_ms,
289 options.password)) {
290 /* try again in 5 seconds */
291 reconnect_source_id = g_timeout_add(5000,
292 timer_reconnect, NULL);
293 return FALSE;
294 }
296 struct mpd_connection *connection = mpdclient_get_connection(mpd);
298 #ifndef NCMPC_MINI
299 /* quit if mpd is pre 0.14 - song id not supported by mpd */
300 if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0) {
301 const unsigned *version =
302 mpd_connection_get_server_version(connection);
303 screen_status_printf(_("Error: MPD version %d.%d.%d is too old (%s needed)"),
304 version[0], version[1], version[2],
305 "0.16.0");
306 mpdclient_disconnect(mpd);
307 doupdate();
309 /* try again after 30 seconds */
310 reconnect_source_id = g_timeout_add(30000,
311 timer_reconnect, NULL);
312 return FALSE;
313 }
314 #endif
316 mpd->source = mpd_glib_new(connection,
317 idle_callback, mpd);
319 screen_status_clear_message();
320 doupdate();
322 /* update immediately */
323 mpd->events = MPD_IDLE_ALL;
325 do_mpd_update();
327 auto_update_timer();
329 return FALSE;
330 }
332 static void
333 check_reconnect(void)
334 {
335 if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
336 /* reconnect when the connection is lost */
337 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
338 NULL);
339 }
341 /**
342 * This function is called by the gidle.c library when MPD sends us an
343 * idle event (or when the connection dies).
344 */
345 static void
346 idle_callback(enum mpd_error error, enum mpd_server_error server_error,
347 const char *message, enum mpd_idle events,
348 void *ctx)
349 {
350 struct mpdclient *c = ctx;
352 c->idle = false;
354 assert(mpdclient_is_connected(c));
356 if (error != MPD_ERROR_SUCCESS) {
357 if (error == MPD_ERROR_SERVER &&
358 server_error == MPD_SERVER_ERROR_UNKNOWN_CMD) {
359 /* the "idle" command is not supported - fall
360 back to timer based polling */
361 mpd_glib_free(c->source);
362 c->source = NULL;
363 auto_update_timer();
364 return;
365 }
367 char *allocated;
368 if (error == MPD_ERROR_SERVER)
369 message = allocated = utf8_to_locale(message);
370 else
371 allocated = NULL;
372 screen_status_message(message);
373 g_free(allocated);
374 screen_bell();
375 doupdate();
377 mpdclient_disconnect(c);
378 screen_update(mpd);
379 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
380 NULL);
381 return;
382 }
384 c->events |= events;
385 mpdclient_update(c);
387 #ifndef NCMPC_MINI
388 if (options.enable_xterm_title)
389 update_xterm_title();
390 #endif
392 screen_update(mpd);
393 c->events = 0;
395 mpdclient_put_connection(c);
396 check_reconnect();
397 auto_update_timer();
398 }
400 static gboolean
401 timer_mpd_update(gcc_unused gpointer data)
402 {
403 do_mpd_update();
405 if (should_enable_update_timer())
406 return true;
407 else {
408 update_source_id = 0;
409 return false;
410 }
411 }
413 void begin_input_event(void)
414 {
415 }
417 void end_input_event(void)
418 {
419 screen_update(mpd);
420 mpd->events = 0;
422 mpdclient_put_connection(mpd);
423 check_reconnect();
424 auto_update_timer();
425 }
427 int do_input_event(command_t cmd)
428 {
429 if (cmd == CMD_QUIT) {
430 g_main_loop_quit(main_loop);
431 return -1;
432 }
434 screen_cmd(mpd, cmd);
436 if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
437 /* make sure we don't update the volume yet */
438 disable_update_timer();
440 return 0;
441 }
443 static gboolean
444 keyboard_event(gcc_unused GIOChannel *source,
445 gcc_unused GIOCondition condition,
446 gcc_unused gpointer data)
447 {
448 begin_input_event();
450 command_t cmd = get_keyboard_command();
451 if (cmd != CMD_NONE)
452 if (do_input_event(cmd) != 0)
453 return FALSE;
455 end_input_event();
456 return TRUE;
457 }
459 #ifndef NCMPC_MINI
460 /**
461 * Check the configured key bindings for errors, and display a status
462 * message every 10 seconds.
463 */
464 static gboolean
465 timer_check_key_bindings(gcc_unused gpointer data)
466 {
467 char buf[256];
469 if (check_key_bindings(NULL, buf, sizeof(buf))) {
470 /* no error: disable this timer for the rest of this
471 process */
472 check_key_bindings_source_id = 0;
473 return FALSE;
474 }
476 #ifdef ENABLE_KEYDEF_SCREEN
477 g_strchomp(buf);
478 g_strlcat(buf, " (", sizeof(buf));
479 /* to translators: a key was bound twice in the key editor,
480 and this is a hint for the user what to press to correct
481 that */
482 char comment[64];
483 g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
484 get_key_names(CMD_SCREEN_KEYDEF, false));
485 g_strlcat(buf, comment, sizeof(buf));
486 g_strlcat(buf, ")", sizeof(buf));
487 #endif
489 screen_status_printf("%s", buf);
491 doupdate();
492 return TRUE;
493 }
494 #endif
496 int
497 main(int argc, const char *argv[])
498 {
499 #ifdef ENABLE_LOCALE
500 #ifndef ENABLE_NLS
501 gcc_unused
502 #endif
503 const char *charset = NULL;
504 /* time and date formatting */
505 setlocale(LC_TIME,"");
506 /* care about sorting order etc */
507 setlocale(LC_COLLATE,"");
508 /* charset */
509 setlocale(LC_CTYPE,"");
510 /* initialize charset conversions */
511 charset = charset_init();
513 /* initialize i18n support */
514 #endif
516 #ifdef ENABLE_NLS
517 setlocale(LC_MESSAGES, "");
518 bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
519 #ifdef ENABLE_LOCALE
520 bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
521 #endif
522 textdomain(GETTEXT_PACKAGE);
523 #endif
525 /* initialize options */
526 options_init();
528 /* parse command line options - 1 pass get configuration files */
529 options_parse(argc, argv);
531 #ifndef NCMPC_MINI
532 /* read configuration */
533 read_configuration();
535 /* check key bindings */
536 check_key_bindings(NULL, NULL, 0);
537 #endif
539 /* parse command line options - 2 pass */
540 options_parse(argc, argv);
542 #ifndef WIN32
543 /* setup signal behavior - SIGINT */
544 struct sigaction act;
545 sigemptyset(&act.sa_mask);
546 act.sa_flags = 0;
547 act.sa_handler = catch_sigint;
548 if (sigaction(SIGINT, &act, NULL) < 0) {
549 perror("signal");
550 exit(EXIT_FAILURE);
551 }
553 /* setup signal behavior - SIGTERM */
555 act.sa_handler = catch_sigint;
556 if (sigaction(SIGTERM, &act, NULL) < 0) {
557 perror("sigaction()");
558 exit(EXIT_FAILURE);
559 }
561 /* setup signal behavior - SIGCONT */
563 act.sa_handler = catch_sigcont;
564 if (sigaction(SIGCONT, &act, NULL) < 0) {
565 perror("sigaction(SIGCONT)");
566 exit(EXIT_FAILURE);
567 }
569 /* setup signal behaviour - SIGHUP*/
571 act.sa_handler = catch_sigint;
572 if (sigaction(SIGHUP, &act, NULL) < 0) {
573 perror("sigaction(SIGHUP)");
574 exit(EXIT_FAILURE);
575 }
577 /* setup SIGWINCH */
579 act.sa_flags = SA_RESTART;
580 act.sa_handler = catch_sigwinch;
581 if (sigaction(SIGWINCH, &act, NULL) < 0) {
582 perror("sigaction(SIGWINCH)");
583 exit(EXIT_FAILURE);
584 }
586 /* ignore SIGPIPE */
588 act.sa_handler = SIG_IGN;
589 if (sigaction(SIGPIPE, &act, NULL) < 0) {
590 perror("sigaction(SIGPIPE)");
591 exit(EXIT_FAILURE);
592 }
593 #endif
595 ncu_init();
597 #ifdef ENABLE_LYRICS_SCREEN
598 lyrics_init();
599 #endif
601 /* create mpdclient instance */
602 mpd = mpdclient_new();
604 /* initialize curses */
605 screen_init(mpd);
607 /* the main loop */
608 main_loop = g_main_loop_new(NULL, FALSE);
610 /* watch out for keyboard input */
611 GIOChannel *keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
612 g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
614 #ifdef ENABLE_LIRC
615 /* watch out for lirc input */
616 int lirc_socket = ncmpc_lirc_open();
617 GIOChannel *lirc_channel = NULL;
618 if (lirc_socket >= 0) {
619 lirc_channel = g_io_channel_unix_new(lirc_socket);
620 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
621 }
622 #endif
624 #ifndef WIN32
625 GIOChannel *sigwinch_channel = NULL;
626 if (!pipe(sigwinch_pipes) &&
627 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
628 sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
629 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
630 }
631 else {
632 perror("sigwinch pipe creation failed");
633 exit(EXIT_FAILURE);
634 }
635 #endif
637 /* attempt to connect */
638 reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
640 auto_update_timer();
642 #ifndef NCMPC_MINI
643 check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
644 #endif
646 screen_paint(mpd);
648 g_main_loop_run(main_loop);
650 /* cleanup */
652 cancel_seek_timer();
654 disable_update_timer();
656 if (reconnect_source_id != 0)
657 g_source_remove(reconnect_source_id);
659 #ifndef NCMPC_MINI
660 if (check_key_bindings_source_id != 0)
661 g_source_remove(check_key_bindings_source_id);
662 #endif
664 g_main_loop_unref(main_loop);
665 g_io_channel_unref(keyboard_channel);
666 g_io_channel_unref(sigwinch_channel);
667 close(sigwinch_pipes[0]);
668 close(sigwinch_pipes[1]);
670 #ifdef ENABLE_LIRC
671 if (lirc_socket >= 0)
672 g_io_channel_unref(lirc_channel);
673 ncmpc_lirc_close();
674 #endif
676 exit_and_cleanup();
678 #ifdef ENABLE_LYRICS_SCREEN
679 lyrics_deinit();
680 #endif
682 ncu_deinit();
683 options_deinit();
685 return 0;
686 }