Code

main: make variables more local
[ncmpc.git] / src / main.c
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)
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         char irrelevant = 'a';
157         if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
158                 exit(EXIT_FAILURE);
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)
174         if (update_source_id != 0)
175                 return;
177         update_source_id = g_timeout_add(update_interval,
178                                          timer_mpd_update, NULL);
181 static void
182 disable_update_timer(void)
184         if (update_source_id == 0)
185                 return;
187         g_source_remove(update_source_id);
188         update_source_id = 0;
191 static bool
192 should_enable_update_timer(void)
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                 ;
204 static void
205 auto_update_timer(void)
207         if (should_enable_update_timer())
208                 enable_update_timer();
209         else
210                 disable_update_timer();
213 static void
214 check_reconnect(void);
216 static void
217 do_mpd_update(void)
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();
237 #if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
239 static char *
240 settings_name(const struct mpd_settings *settings)
242         const char *host = mpd_settings_get_host(settings);
243         if (host == NULL)
244                 host = _("unknown");
246         if (host[0] == '/')
247                 return g_strdup(host);
249         unsigned port = mpd_settings_get_port(settings);
250         if (port == 0 || port == 6600)
251                 return g_strdup(host);
253         return g_strdup_printf("%s:%u", host, port);
256 #endif
258 static char *
259 default_settings_name(void)
261 #if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
262         struct mpd_settings *settings =
263                 mpd_settings_new(options.host, options.port, 0,
264                                  NULL, options.password);
265         if (settings == NULL)
266                 return g_strdup(_("unknown"));
268         char *name = settings_name(settings);
269         mpd_settings_free(settings);
271         return name;
272 #else
273         /*
274          * localhost is actually not correct, we only know that
275          * mpd_connection_new() has connected to the "default host".
276          */
277         const char *name = options.host ?: "localhost";
278         return g_strdup(name);
279 #endif
282 /**
283  * This timer is installed when the connection to the MPD server is
284  * broken.  It tries to recover by reconnecting periodically.
285  */
286 static gboolean
287 timer_reconnect(gcc_unused gpointer data)
289         assert(!mpdclient_is_connected(mpd));
291         reconnect_source_id = 0;
293         char *name = default_settings_name();
294         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
295                              name, get_key_names(CMD_QUIT, false));
296         g_free(name);
297         doupdate();
299         mpdclient_disconnect(mpd);
300         if (!mpdclient_connect(mpd, options.host, options.port,
301                                options.timeout_ms,
302                                options.password)) {
303                 /* try again in 5 seconds */
304                 reconnect_source_id = g_timeout_add(5000,
305                                                     timer_reconnect, NULL);
306                 return FALSE;
307         }
309         struct mpd_connection *connection = mpdclient_get_connection(mpd);
311 #ifndef NCMPC_MINI
312         /* quit if mpd is pre 0.14 - song id not supported by mpd */
313         if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0) {
314                 const unsigned *version =
315                         mpd_connection_get_server_version(connection);
316                 screen_status_printf(_("Error: MPD version %d.%d.%d is too old (%s needed)"),
317                                      version[0], version[1], version[2],
318                                      "0.16.0");
319                 mpdclient_disconnect(mpd);
320                 doupdate();
322                 /* try again after 30 seconds */
323                 reconnect_source_id = g_timeout_add(30000,
324                                                     timer_reconnect, NULL);
325                 return FALSE;
326         }
327 #endif
329         mpd->source = mpd_glib_new(connection,
330                                    idle_callback, mpd);
332         screen_status_clear_message();
333         doupdate();
335         /* update immediately */
336         mpd->events = MPD_IDLE_ALL;
338         do_mpd_update();
340         auto_update_timer();
342         return FALSE;
345 static void
346 check_reconnect(void)
348         if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
349                 /* reconnect when the connection is lost */
350                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
351                                                     NULL);
354 /**
355  * This function is called by the gidle.c library when MPD sends us an
356  * idle event (or when the connection dies).
357  */
358 static void
359 idle_callback(enum mpd_error error, enum mpd_server_error server_error,
360               const char *message, enum mpd_idle events,
361               void *ctx)
363         struct mpdclient *c = ctx;
365         c->idle = false;
367         assert(mpdclient_is_connected(c));
369         if (error != MPD_ERROR_SUCCESS) {
370                 if (error == MPD_ERROR_SERVER &&
371                     server_error == MPD_SERVER_ERROR_UNKNOWN_CMD) {
372                         /* the "idle" command is not supported - fall
373                            back to timer based polling */
374                         mpd_glib_free(c->source);
375                         c->source = NULL;
376                         auto_update_timer();
377                         return;
378                 }
380                 char *allocated;
381                 if (error == MPD_ERROR_SERVER)
382                         message = allocated = utf8_to_locale(message);
383                 else
384                         allocated = NULL;
385                 screen_status_message(message);
386                 g_free(allocated);
387                 screen_bell();
388                 doupdate();
390                 mpdclient_disconnect(c);
391                 screen_update(mpd);
392                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
393                                                     NULL);
394                 return;
395         }
397         c->events |= events;
398         mpdclient_update(c);
400 #ifndef NCMPC_MINI
401         if (options.enable_xterm_title)
402                 update_xterm_title();
403 #endif
405         screen_update(mpd);
406         c->events = 0;
408         mpdclient_put_connection(c);
409         check_reconnect();
410         auto_update_timer();
413 static gboolean
414 timer_mpd_update(gcc_unused gpointer data)
416         do_mpd_update();
418         if (should_enable_update_timer())
419                 return true;
420         else {
421                 update_source_id = 0;
422                 return false;
423         }
426 void begin_input_event(void)
430 void end_input_event(void)
432         screen_update(mpd);
433         mpd->events = 0;
435         mpdclient_put_connection(mpd);
436         check_reconnect();
437         auto_update_timer();
440 int do_input_event(command_t cmd)
442         if (cmd == CMD_QUIT) {
443                 g_main_loop_quit(main_loop);
444                 return -1;
445         }
447         screen_cmd(mpd, cmd);
449         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
450                 /* make sure we don't update the volume yet */
451                 disable_update_timer();
453         return 0;
456 static gboolean
457 keyboard_event(gcc_unused GIOChannel *source,
458                gcc_unused GIOCondition condition,
459                gcc_unused gpointer data)
461         begin_input_event();
463         command_t cmd = get_keyboard_command();
464         if (cmd != CMD_NONE)
465                 if (do_input_event(cmd) != 0)
466                         return FALSE;
468         end_input_event();
469         return TRUE;
472 #ifndef NCMPC_MINI
473 /**
474  * Check the configured key bindings for errors, and display a status
475  * message every 10 seconds.
476  */
477 static gboolean
478 timer_check_key_bindings(gcc_unused gpointer data)
480         char buf[256];
482         if (check_key_bindings(NULL, buf, sizeof(buf))) {
483                 /* no error: disable this timer for the rest of this
484                    process */
485                 check_key_bindings_source_id = 0;
486                 return FALSE;
487         }
489 #ifdef ENABLE_KEYDEF_SCREEN
490         g_strchomp(buf);
491         g_strlcat(buf, " (", sizeof(buf));
492         /* to translators: a key was bound twice in the key editor,
493            and this is a hint for the user what to press to correct
494            that */
495         char comment[64];
496         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
497                    get_key_names(CMD_SCREEN_KEYDEF, false));
498         g_strlcat(buf, comment, sizeof(buf));
499         g_strlcat(buf, ")", sizeof(buf));
500 #endif
502         screen_status_printf("%s", buf);
504         doupdate();
505         return TRUE;
507 #endif
509 int
510 main(int argc, const char *argv[])
512 #ifdef ENABLE_LOCALE
513 #ifndef ENABLE_NLS
514         gcc_unused
515 #endif
516         const char *charset = NULL;
517         /* time and date formatting */
518         setlocale(LC_TIME,"");
519         /* care about sorting order etc */
520         setlocale(LC_COLLATE,"");
521         /* charset */
522         setlocale(LC_CTYPE,"");
523         /* initialize charset conversions */
524         charset = charset_init();
526         /* initialize i18n support */
527 #endif
529 #ifdef ENABLE_NLS
530         setlocale(LC_MESSAGES, "");
531         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
532 #ifdef ENABLE_LOCALE
533         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
534 #endif
535         textdomain(GETTEXT_PACKAGE);
536 #endif
538         /* initialize options */
539         options_init();
541         /* parse command line options - 1 pass get configuration files */
542         options_parse(argc, argv);
544 #ifndef NCMPC_MINI
545         /* read configuration */
546         read_configuration();
548         /* check key bindings */
549         check_key_bindings(NULL, NULL, 0);
550 #endif
552         /* parse command line options - 2 pass */
553         options_parse(argc, argv);
555 #ifndef WIN32
556         /* setup signal behavior - SIGINT */
557         struct sigaction act;
558         sigemptyset(&act.sa_mask);
559         act.sa_flags = 0;
560         act.sa_handler = catch_sigint;
561         if (sigaction(SIGINT, &act, NULL) < 0) {
562                 perror("signal");
563                 exit(EXIT_FAILURE);
564         }
566         /* setup signal behavior - SIGTERM */
568         act.sa_handler = catch_sigint;
569         if (sigaction(SIGTERM, &act, NULL) < 0) {
570                 perror("sigaction()");
571                 exit(EXIT_FAILURE);
572         }
574         /* setup signal behavior - SIGCONT */
576         act.sa_handler = catch_sigcont;
577         if (sigaction(SIGCONT, &act, NULL) < 0) {
578                 perror("sigaction(SIGCONT)");
579                 exit(EXIT_FAILURE);
580         }
582         /* setup signal behaviour - SIGHUP*/
584         act.sa_handler = catch_sigint;
585         if (sigaction(SIGHUP, &act, NULL) < 0) {
586                 perror("sigaction(SIGHUP)");
587                 exit(EXIT_FAILURE);
588         }
590         /* setup SIGWINCH */
592         act.sa_flags = SA_RESTART;
593         act.sa_handler = catch_sigwinch;
594         if (sigaction(SIGWINCH, &act, NULL) < 0) {
595                 perror("sigaction(SIGWINCH)");
596                 exit(EXIT_FAILURE);
597         }
599         /* ignore SIGPIPE */
601         act.sa_handler = SIG_IGN;
602         if (sigaction(SIGPIPE, &act, NULL) < 0) {
603                 perror("sigaction(SIGPIPE)");
604                 exit(EXIT_FAILURE);
605         }
606 #endif
608         ncu_init();
610 #ifdef ENABLE_LYRICS_SCREEN
611         lyrics_init();
612 #endif
614         /* create mpdclient instance */
615         mpd = mpdclient_new();
617         /* initialize curses */
618         screen_init(mpd);
620         /* the main loop */
621         main_loop = g_main_loop_new(NULL, FALSE);
623         /* watch out for keyboard input */
624         GIOChannel *keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
625         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
627 #ifdef ENABLE_LIRC
628         /* watch out for lirc input */
629         int lirc_socket = ncmpc_lirc_open();
630         GIOChannel *lirc_channel = NULL;
631         if (lirc_socket >= 0) {
632                 lirc_channel = g_io_channel_unix_new(lirc_socket);
633                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
634         }
635 #endif
637 #ifndef WIN32
638         GIOChannel *sigwinch_channel = NULL;
639         if (!pipe(sigwinch_pipes) &&
640                 !fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
641                 sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
642                 g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
643         }
644         else {
645                 perror("sigwinch pipe creation failed");
646                 exit(EXIT_FAILURE);
647         }
648 #endif
650         /* attempt to connect */
651         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
653         auto_update_timer();
655 #ifndef NCMPC_MINI
656         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
657 #endif
659         screen_paint(mpd);
661         g_main_loop_run(main_loop);
663         /* cleanup */
665         cancel_seek_timer();
667         disable_update_timer();
669         if (reconnect_source_id != 0)
670                 g_source_remove(reconnect_source_id);
672 #ifndef NCMPC_MINI
673         if (check_key_bindings_source_id != 0)
674                 g_source_remove(check_key_bindings_source_id);
675 #endif
677         g_main_loop_unref(main_loop);
678         g_io_channel_unref(keyboard_channel);
679         g_io_channel_unref(sigwinch_channel);
680         close(sigwinch_pipes[0]);
681         close(sigwinch_pipes[1]);
683 #ifdef ENABLE_LIRC
684         if (lirc_socket >= 0)
685                 g_io_channel_unref(lirc_channel);
686         ncmpc_lirc_close();
687 #endif
689         exit_and_cleanup();
691 #ifdef ENABLE_LYRICS_SCREEN
692         lyrics_deinit();
693 #endif
695         ncu_deinit();
696         options_deinit();
698         return 0;