Code

main: remove the "idle" fallback code
[ncmpc.git] / 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  */
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)
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         }
114 #ifndef WIN32
115 static void
116 catch_sigint(gcc_unused int sig)
118         g_main_loop_quit(main_loop);
122 static void
123 catch_sigcont(gcc_unused int sig)
125         char irrelevant = 'a';
126         if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
127                 exit(EXIT_FAILURE);
130 void
131 sigstop(void)
133         def_prog_mode();  /* save the tty modes */
134         endwin();         /* end curses mode temporarily */
135         kill(0, SIGSTOP); /* issue SIGSTOP */
138 static gboolean
139 sigwinch_event(gcc_unused GIOChannel *source,
140                gcc_unused GIOCondition condition, gcc_unused gpointer data)
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;
153 static void
154 catch_sigwinch(gcc_unused int sig)
156         if (1 != write(sigwinch_pipes[1], "", 1))
157                 exit(EXIT_FAILURE);
159 #endif /* WIN32 */
161 static void
162 idle_callback(enum mpd_error error,
163               gcc_unused enum mpd_server_error server_error,
164               const char *message, enum mpd_idle events,
165               gcc_unused void *ctx);
167 static gboolean
168 timer_mpd_update(gpointer data);
170 static void
171 enable_update_timer(void)
173         if (update_source_id != 0)
174                 return;
176         update_source_id = g_timeout_add(update_interval,
177                                          timer_mpd_update, NULL);
180 static void
181 disable_update_timer(void)
183         if (update_source_id == 0)
184                 return;
186         g_source_remove(update_source_id);
187         update_source_id = 0;
190 static bool
191 should_enable_update_timer(void)
193         return (mpdclient_is_connected(mpd) &&
194                 mpd->status != NULL &&
195                 mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)
196 #ifndef NCMPC_MINI
197                 || options.display_time
198 #endif
199                 ;
202 static void
203 auto_update_timer(void)
205         if (should_enable_update_timer())
206                 enable_update_timer();
207         else
208                 disable_update_timer();
211 static void
212 check_reconnect(void);
214 static void
215 do_mpd_update(void)
217         if (mpdclient_is_connected(mpd) &&
218             (mpd->events != 0 ||
219              (mpd->status != NULL &&
220               mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
221                 mpdclient_update(mpd);
223 #ifndef NCMPC_MINI
224         if (options.enable_xterm_title)
225                 update_xterm_title();
226 #endif
228         screen_update(mpd);
229         mpd->events = 0;
231         mpdclient_put_connection(mpd);
232         check_reconnect();
235 static char *
236 settings_name(const struct mpd_settings *settings)
238         const char *host = mpd_settings_get_host(settings);
239         if (host == NULL)
240                 host = _("unknown");
242         if (host[0] == '/')
243                 return g_strdup(host);
245         unsigned port = mpd_settings_get_port(settings);
246         if (port == 0 || port == 6600)
247                 return g_strdup(host);
249         return g_strdup_printf("%s:%u", host, port);
252 static char *
253 default_settings_name(void)
255         struct mpd_settings *settings =
256                 mpd_settings_new(options.host, options.port, 0,
257                                  NULL, options.password);
258         if (settings == NULL)
259                 return g_strdup(_("unknown"));
261         char *name = settings_name(settings);
262         mpd_settings_free(settings);
264         return name;
267 /**
268  * This timer is installed when the connection to the MPD server is
269  * broken.  It tries to recover by reconnecting periodically.
270  */
271 static gboolean
272 timer_reconnect(gcc_unused gpointer data)
274         assert(!mpdclient_is_connected(mpd));
276         reconnect_source_id = 0;
278         char *name = default_settings_name();
279         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
280                              name, get_key_names(CMD_QUIT, false));
281         g_free(name);
282         doupdate();
284         mpdclient_disconnect(mpd);
285         if (!mpdclient_connect(mpd, options.host, options.port,
286                                options.timeout_ms,
287                                options.password)) {
288                 /* try again in 5 seconds */
289                 reconnect_source_id = g_timeout_add(5000,
290                                                     timer_reconnect, NULL);
291                 return FALSE;
292         }
294         struct mpd_connection *connection = mpdclient_get_connection(mpd);
296 #ifndef NCMPC_MINI
297         /* quit if mpd is pre 0.14 - song id not supported by mpd */
298         if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0) {
299                 const unsigned *version =
300                         mpd_connection_get_server_version(connection);
301                 screen_status_printf(_("Error: MPD version %d.%d.%d is too old (%s needed)"),
302                                      version[0], version[1], version[2],
303                                      "0.16.0");
304                 mpdclient_disconnect(mpd);
305                 doupdate();
307                 /* try again after 30 seconds */
308                 reconnect_source_id = g_timeout_add(30000,
309                                                     timer_reconnect, NULL);
310                 return FALSE;
311         }
312 #endif
314         mpd->source = mpd_glib_new(connection,
315                                    idle_callback, mpd);
317         screen_status_clear_message();
318         doupdate();
320         /* update immediately */
321         mpd->events = MPD_IDLE_ALL;
323         do_mpd_update();
325         auto_update_timer();
327         return FALSE;
330 static void
331 check_reconnect(void)
333         if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
334                 /* reconnect when the connection is lost */
335                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
336                                                     NULL);
339 /**
340  * This function is called by the gidle.c library when MPD sends us an
341  * idle event (or when the connection dies).
342  */
343 static void
344 idle_callback(enum mpd_error error,
345               gcc_unused enum mpd_server_error server_error,
346               const char *message, enum mpd_idle events,
347               void *ctx)
349         struct mpdclient *c = ctx;
351         c->idle = false;
353         assert(mpdclient_is_connected(c));
355         if (error != MPD_ERROR_SUCCESS) {
356                 char *allocated;
357                 if (error == MPD_ERROR_SERVER)
358                         message = allocated = utf8_to_locale(message);
359                 else
360                         allocated = NULL;
361                 screen_status_message(message);
362                 g_free(allocated);
363                 screen_bell();
364                 doupdate();
366                 mpdclient_disconnect(c);
367                 screen_update(mpd);
368                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
369                                                     NULL);
370                 return;
371         }
373         c->events |= events;
374         mpdclient_update(c);
376 #ifndef NCMPC_MINI
377         if (options.enable_xterm_title)
378                 update_xterm_title();
379 #endif
381         screen_update(mpd);
382         c->events = 0;
384         mpdclient_put_connection(c);
385         check_reconnect();
386         auto_update_timer();
389 static gboolean
390 timer_mpd_update(gcc_unused gpointer data)
392         do_mpd_update();
394         if (should_enable_update_timer())
395                 return true;
396         else {
397                 update_source_id = 0;
398                 return false;
399         }
402 void begin_input_event(void)
406 void end_input_event(void)
408         screen_update(mpd);
409         mpd->events = 0;
411         mpdclient_put_connection(mpd);
412         check_reconnect();
413         auto_update_timer();
416 int do_input_event(command_t cmd)
418         if (cmd == CMD_QUIT) {
419                 g_main_loop_quit(main_loop);
420                 return -1;
421         }
423         screen_cmd(mpd, cmd);
425         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
426                 /* make sure we don't update the volume yet */
427                 disable_update_timer();
429         return 0;
432 static gboolean
433 keyboard_event(gcc_unused GIOChannel *source,
434                gcc_unused GIOCondition condition,
435                gcc_unused gpointer data)
437         begin_input_event();
439         command_t cmd = get_keyboard_command();
440         if (cmd != CMD_NONE)
441                 if (do_input_event(cmd) != 0)
442                         return FALSE;
444         end_input_event();
445         return TRUE;
448 #ifndef NCMPC_MINI
449 /**
450  * Check the configured key bindings for errors, and display a status
451  * message every 10 seconds.
452  */
453 static gboolean
454 timer_check_key_bindings(gcc_unused gpointer data)
456         char buf[256];
458         if (check_key_bindings(NULL, buf, sizeof(buf))) {
459                 /* no error: disable this timer for the rest of this
460                    process */
461                 check_key_bindings_source_id = 0;
462                 return FALSE;
463         }
465 #ifdef ENABLE_KEYDEF_SCREEN
466         g_strchomp(buf);
467         g_strlcat(buf, " (", sizeof(buf));
468         /* to translators: a key was bound twice in the key editor,
469            and this is a hint for the user what to press to correct
470            that */
471         char comment[64];
472         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
473                    get_key_names(CMD_SCREEN_KEYDEF, false));
474         g_strlcat(buf, comment, sizeof(buf));
475         g_strlcat(buf, ")", sizeof(buf));
476 #endif
478         screen_status_printf("%s", buf);
480         doupdate();
481         return TRUE;
483 #endif
485 int
486 main(int argc, const char *argv[])
488 #ifdef ENABLE_LOCALE
489 #ifndef ENABLE_NLS
490         gcc_unused
491 #endif
492         const char *charset = NULL;
493         /* time and date formatting */
494         setlocale(LC_TIME,"");
495         /* care about sorting order etc */
496         setlocale(LC_COLLATE,"");
497         /* charset */
498         setlocale(LC_CTYPE,"");
499         /* initialize charset conversions */
500         charset = charset_init();
502         /* initialize i18n support */
503 #endif
505 #ifdef ENABLE_NLS
506         setlocale(LC_MESSAGES, "");
507         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
508 #ifdef ENABLE_LOCALE
509         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
510 #endif
511         textdomain(GETTEXT_PACKAGE);
512 #endif
514         /* initialize options */
515         options_init();
517         /* parse command line options - 1 pass get configuration files */
518         options_parse(argc, argv);
520 #ifndef NCMPC_MINI
521         /* read configuration */
522         read_configuration();
524         /* check key bindings */
525         check_key_bindings(NULL, NULL, 0);
526 #endif
528         /* parse command line options - 2 pass */
529         options_parse(argc, argv);
531 #ifndef WIN32
532         /* setup signal behavior - SIGINT */
533         struct sigaction act;
534         sigemptyset(&act.sa_mask);
535         act.sa_flags = 0;
536         act.sa_handler = catch_sigint;
537         if (sigaction(SIGINT, &act, NULL) < 0) {
538                 perror("signal");
539                 exit(EXIT_FAILURE);
540         }
542         /* setup signal behavior - SIGTERM */
544         act.sa_handler = catch_sigint;
545         if (sigaction(SIGTERM, &act, NULL) < 0) {
546                 perror("sigaction()");
547                 exit(EXIT_FAILURE);
548         }
550         /* setup signal behavior - SIGCONT */
552         act.sa_handler = catch_sigcont;
553         if (sigaction(SIGCONT, &act, NULL) < 0) {
554                 perror("sigaction(SIGCONT)");
555                 exit(EXIT_FAILURE);
556         }
558         /* setup signal behaviour - SIGHUP*/
560         act.sa_handler = catch_sigint;
561         if (sigaction(SIGHUP, &act, NULL) < 0) {
562                 perror("sigaction(SIGHUP)");
563                 exit(EXIT_FAILURE);
564         }
566         /* setup SIGWINCH */
568         act.sa_flags = SA_RESTART;
569         act.sa_handler = catch_sigwinch;
570         if (sigaction(SIGWINCH, &act, NULL) < 0) {
571                 perror("sigaction(SIGWINCH)");
572                 exit(EXIT_FAILURE);
573         }
575         /* ignore SIGPIPE */
577         act.sa_handler = SIG_IGN;
578         if (sigaction(SIGPIPE, &act, NULL) < 0) {
579                 perror("sigaction(SIGPIPE)");
580                 exit(EXIT_FAILURE);
581         }
582 #endif
584         ncu_init();
586 #ifdef ENABLE_LYRICS_SCREEN
587         lyrics_init();
588 #endif
590         /* create mpdclient instance */
591         mpd = mpdclient_new();
593         /* initialize curses */
594         screen_init(mpd);
596         /* the main loop */
597         main_loop = g_main_loop_new(NULL, FALSE);
599         /* watch out for keyboard input */
600         GIOChannel *keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
601         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
603 #ifdef ENABLE_LIRC
604         /* watch out for lirc input */
605         int lirc_socket = ncmpc_lirc_open();
606         GIOChannel *lirc_channel = NULL;
607         if (lirc_socket >= 0) {
608                 lirc_channel = g_io_channel_unix_new(lirc_socket);
609                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
610         }
611 #endif
613 #ifndef WIN32
614         GIOChannel *sigwinch_channel = NULL;
615         if (!pipe(sigwinch_pipes) &&
616                 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
617                 sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
618                 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
619         }
620         else {
621                 perror("sigwinch pipe creation failed");
622                 exit(EXIT_FAILURE);
623         }
624 #endif
626         /* attempt to connect */
627         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
629         auto_update_timer();
631 #ifndef NCMPC_MINI
632         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
633 #endif
635         screen_paint(mpd);
637         g_main_loop_run(main_loop);
639         /* cleanup */
641         cancel_seek_timer();
643         disable_update_timer();
645         if (reconnect_source_id != 0)
646                 g_source_remove(reconnect_source_id);
648 #ifndef NCMPC_MINI
649         if (check_key_bindings_source_id != 0)
650                 g_source_remove(check_key_bindings_source_id);
651 #endif
653         g_main_loop_unref(main_loop);
654         g_io_channel_unref(keyboard_channel);
655         g_io_channel_unref(sigwinch_channel);
656         close(sigwinch_pipes[0]);
657         close(sigwinch_pipes[1]);
659 #ifdef ENABLE_LIRC
660         if (lirc_socket >= 0)
661                 g_io_channel_unref(lirc_channel);
662         ncmpc_lirc_close();
663 #endif
665         exit_and_cleanup();
667 #ifdef ENABLE_LYRICS_SCREEN
668         lyrics_deinit();
669 #endif
671         ncu_deinit();
672         options_deinit();
674         return 0;