File: main.c

package info (click to toggle)
ncmpc 0.25-0.1%2Bdeb9u1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 2,616 kB
  • sloc: ansic: 12,229; sh: 4,157; makefile: 282; ruby: 28
file content (699 lines) | stat: -rw-r--r-- 14,728 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
/* ncmpc (Ncurses MPD Client)
 * (c) 2004-2010 The Music Player Daemon Project
 * Project homepage: http://musicpd.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"
#include "ncmpc.h"
#include "mpdclient.h"
#include "gidle.h"
#include "charset.h"
#include "options.h"
#include "command.h"
#include "ncu.h"
#include "screen.h"
#include "screen_utils.h"
#include "screen_status.h"
#include "strfsong.h"
#include "i18n.h"
#include "player_command.h"

#ifndef NCMPC_MINI
#include "conf.h"
#endif

#ifdef ENABLE_LYRICS_SCREEN
#include "lyrics.h"
#endif

#ifdef ENABLE_LIRC
#include "lirc.h"
#endif

#include <mpd/client.h>

#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <string.h>

#ifdef ENABLE_LOCALE
#include <locale.h>
#endif

/* time between mpd updates [ms] */
static const guint update_interval = 500;

#define BUFSIZE 1024

static struct mpdclient *mpd = NULL;
static GMainLoop *main_loop;
static guint reconnect_source_id, update_source_id;
static int sigwinch_pipes[2];

#ifndef NCMPC_MINI
static guint check_key_bindings_source_id;
#endif

#ifndef NCMPC_MINI
static void
update_xterm_title(void)
{
	struct mpd_status *status = NULL;
	const struct mpd_song *song = NULL;
	if (mpd) {
		status = mpd->status;
		song = mpd->song;
	}

	char tmp[BUFSIZE];
	if (options.xterm_title_format && status && song &&
	    mpd_status_get_state(status) == MPD_STATE_PLAY)
		strfsong(tmp, BUFSIZE, options.xterm_title_format, song);
	else
		g_strlcpy(tmp, PACKAGE " version " VERSION, BUFSIZE);

	static char title[BUFSIZE];
	if (strncmp(title, tmp, BUFSIZE)) {
		g_strlcpy(title, tmp, BUFSIZE);
		set_xterm_title("%s", title);
	}
}
#endif

static void
exit_and_cleanup(void)
{
	screen_exit();
#ifndef NCMPC_MINI
	set_xterm_title("");
#endif
	printf("\n");

	if (mpd) {
		mpdclient_disconnect(mpd);
		mpdclient_free(mpd);
	}
}

#ifndef WIN32
static void
catch_sigint(gcc_unused int sig)
{
	g_main_loop_quit(main_loop);
}


static void
catch_sigcont(gcc_unused int sig)
{
	char irrelevant = 'a';
	if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
		exit(EXIT_FAILURE);
}

void
sigstop(void)
{
	def_prog_mode();  /* save the tty modes */
	endwin();         /* end curses mode temporarily */
	kill(0, SIGSTOP); /* issue SIGSTOP */
}

static gboolean
sigwinch_event(gcc_unused GIOChannel *source,
               gcc_unused GIOCondition condition, gcc_unused gpointer data)
{
	char ignoreme[64];
	if (1 > read(sigwinch_pipes[0], ignoreme, 64))
		exit(EXIT_FAILURE);

	endwin();
	refresh();
	screen_resize(mpd);

	return TRUE;
}

static void
catch_sigwinch(gcc_unused int sig)
{
	char irrelevant = 'a';
	if (1 != write(sigwinch_pipes[1], &irrelevant, 1))
		exit(EXIT_FAILURE);
}
#endif /* WIN32 */

static void
idle_callback(enum mpd_error error,
	      gcc_unused enum mpd_server_error server_error,
	      const char *message, enum mpd_idle events,
	      gcc_unused void *ctx);

static gboolean
timer_mpd_update(gpointer data);

static void
enable_update_timer(void)
{
	if (update_source_id != 0)
		return;

	update_source_id = g_timeout_add(update_interval,
					 timer_mpd_update, NULL);
}

static void
disable_update_timer(void)
{
	if (update_source_id == 0)
		return;

	g_source_remove(update_source_id);
	update_source_id = 0;
}

static bool
should_enable_update_timer(void)
{
	return (mpdclient_is_connected(mpd) &&
		(mpd->source == NULL || /* "idle" not supported */
		 (mpd->status != NULL &&
		  mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
#ifndef NCMPC_MINI
		|| options.display_time
#endif
		;
}

static void
auto_update_timer(void)
{
	if (should_enable_update_timer())
		enable_update_timer();
	else
		disable_update_timer();
}

static void
check_reconnect(void);

static void
do_mpd_update(void)
{
	if (mpdclient_is_connected(mpd) &&
	    (mpd->source == NULL || mpd->events != 0 ||
	     (mpd->status != NULL &&
	      mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
		mpdclient_update(mpd);

#ifndef NCMPC_MINI
	if (options.enable_xterm_title)
		update_xterm_title();
#endif

	screen_update(mpd);
	mpd->events = 0;

	mpdclient_put_connection(mpd);
	check_reconnect();
}

#if LIBMPDCLIENT_CHECK_VERSION(2,4,0)

static char *
settings_name(const struct mpd_settings *settings)
{
	const char *host = mpd_settings_get_host(settings);
	if (host == NULL)
		host = _("unknown");

	if (host[0] == '/')
		return g_strdup(host);

	unsigned port = mpd_settings_get_port(settings);
	if (port == 0 || port == 6600)
		return g_strdup(host);

	return g_strdup_printf("%s:%u", host, port);
}

#endif

static char *
default_settings_name(void)
{
#if LIBMPDCLIENT_CHECK_VERSION(2,4,0)
	struct mpd_settings *settings =
		mpd_settings_new(options.host, options.port, 0,
				 NULL, options.password);
	if (settings == NULL)
		return g_strdup(_("unknown"));

	char *name = settings_name(settings);
	mpd_settings_free(settings);

	return name;
#else
	/*
	 * localhost is actually not correct, we only know that
	 * mpd_connection_new() has connected to the "default host".
	 */
	const char *name = options.host ?: "localhost";
	return g_strdup(name);
#endif
}

/**
 * This timer is installed when the connection to the MPD server is
 * broken.  It tries to recover by reconnecting periodically.
 */
static gboolean
timer_reconnect(gcc_unused gpointer data)
{
	assert(!mpdclient_is_connected(mpd));

	reconnect_source_id = 0;

	char *name = default_settings_name();
	screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
			     name, get_key_names(CMD_QUIT, false));
	g_free(name);
	doupdate();

	mpdclient_disconnect(mpd);
	if (!mpdclient_connect(mpd, options.host, options.port,
			       options.timeout_ms,
			       options.password)) {
		/* try again in 5 seconds */
		reconnect_source_id = g_timeout_add(5000,
						    timer_reconnect, NULL);
		return FALSE;
	}

	struct mpd_connection *connection = mpdclient_get_connection(mpd);

#ifndef NCMPC_MINI
	/* quit if mpd is pre 0.14 - song id not supported by mpd */
	if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0) {
		const unsigned *version =
			mpd_connection_get_server_version(connection);
		screen_status_printf(_("Error: MPD version %d.%d.%d is too old (%s needed)"),
				     version[0], version[1], version[2],
				     "0.16.0");
		mpdclient_disconnect(mpd);
		doupdate();

		/* try again after 30 seconds */
		reconnect_source_id = g_timeout_add(30000,
						    timer_reconnect, NULL);
		return FALSE;
	}
#endif

	mpd->source = mpd_glib_new(connection,
				   idle_callback, mpd);

	screen_status_clear_message();
	doupdate();

	/* update immediately */
	mpd->events = MPD_IDLE_ALL;

	do_mpd_update();

	auto_update_timer();

	return FALSE;
}

static void
check_reconnect(void)
{
	if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
		/* reconnect when the connection is lost */
		reconnect_source_id = g_timeout_add(1000, timer_reconnect,
						    NULL);
}

/**
 * This function is called by the gidle.c library when MPD sends us an
 * idle event (or when the connection dies).
 */
static void
idle_callback(enum mpd_error error, enum mpd_server_error server_error,
	      const char *message, enum mpd_idle events,
	      void *ctx)
{
	struct mpdclient *c = ctx;

	c->idle = false;

	assert(mpdclient_is_connected(c));

	if (error != MPD_ERROR_SUCCESS) {
		if (error == MPD_ERROR_SERVER &&
		    server_error == MPD_SERVER_ERROR_UNKNOWN_CMD) {
			/* the "idle" command is not supported - fall
			   back to timer based polling */
			mpd_glib_free(c->source);
			c->source = NULL;
			auto_update_timer();
			return;
		}

		char *allocated;
		if (error == MPD_ERROR_SERVER)
			message = allocated = utf8_to_locale(message);
		else
			allocated = NULL;
		screen_status_message(message);
		g_free(allocated);
		screen_bell();
		doupdate();

		mpdclient_disconnect(c);
		screen_update(mpd);
		reconnect_source_id = g_timeout_add(1000, timer_reconnect,
						    NULL);
		return;
	}

	c->events |= events;
	mpdclient_update(c);

#ifndef NCMPC_MINI
	if (options.enable_xterm_title)
		update_xterm_title();
#endif

	screen_update(mpd);
	c->events = 0;

	mpdclient_put_connection(c);
	check_reconnect();
	auto_update_timer();
}

static gboolean
timer_mpd_update(gcc_unused gpointer data)
{
	do_mpd_update();

	if (should_enable_update_timer())
		return true;
	else {
		update_source_id = 0;
		return false;
	}
}

void begin_input_event(void)
{
}

void end_input_event(void)
{
	screen_update(mpd);
	mpd->events = 0;

	mpdclient_put_connection(mpd);
	check_reconnect();
	auto_update_timer();
}

int do_input_event(command_t cmd)
{
	if (cmd == CMD_QUIT) {
		g_main_loop_quit(main_loop);
		return -1;
	}

	screen_cmd(mpd, cmd);

	if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
		/* make sure we don't update the volume yet */
		disable_update_timer();

	return 0;
}

static gboolean
keyboard_event(gcc_unused GIOChannel *source,
	       gcc_unused GIOCondition condition,
	       gcc_unused gpointer data)
{
	begin_input_event();

	command_t cmd = get_keyboard_command();
	if (cmd != CMD_NONE)
		if (do_input_event(cmd) != 0)
			return FALSE;

	end_input_event();
	return TRUE;
}

#ifndef NCMPC_MINI
/**
 * Check the configured key bindings for errors, and display a status
 * message every 10 seconds.
 */
static gboolean
timer_check_key_bindings(gcc_unused gpointer data)
{
	char buf[256];

	if (check_key_bindings(NULL, buf, sizeof(buf))) {
		/* no error: disable this timer for the rest of this
		   process */
		check_key_bindings_source_id = 0;
		return FALSE;
	}

#ifdef ENABLE_KEYDEF_SCREEN
	g_strchomp(buf);
	g_strlcat(buf, " (", sizeof(buf));
	/* to translators: a key was bound twice in the key editor,
	   and this is a hint for the user what to press to correct
	   that */
	char comment[64];
	g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
		   get_key_names(CMD_SCREEN_KEYDEF, false));
	g_strlcat(buf, comment, sizeof(buf));
	g_strlcat(buf, ")", sizeof(buf));
#endif

	screen_status_printf("%s", buf);

	doupdate();
	return TRUE;
}
#endif

int
main(int argc, const char *argv[])
{
#ifdef ENABLE_LOCALE
#ifndef ENABLE_NLS
	gcc_unused
#endif
	const char *charset = NULL;
	/* time and date formatting */
	setlocale(LC_TIME,"");
	/* care about sorting order etc */
	setlocale(LC_COLLATE,"");
	/* charset */
	setlocale(LC_CTYPE,"");
	/* initialize charset conversions */
	charset = charset_init();

	/* initialize i18n support */
#endif

#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
#ifdef ENABLE_LOCALE
	bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
#endif
	textdomain(GETTEXT_PACKAGE);
#endif

	/* initialize options */
	options_init();

	/* parse command line options - 1 pass get configuration files */
	options_parse(argc, argv);

#ifndef NCMPC_MINI
	/* read configuration */
	read_configuration();

	/* check key bindings */
	check_key_bindings(NULL, NULL, 0);
#endif

	/* parse command line options - 2 pass */
	options_parse(argc, argv);

#ifndef WIN32
	/* setup signal behavior - SIGINT */
	struct sigaction act;
	sigemptyset(&act.sa_mask);
	act.sa_flags = 0;
	act.sa_handler = catch_sigint;
	if (sigaction(SIGINT, &act, NULL) < 0) {
		perror("signal");
		exit(EXIT_FAILURE);
	}

	/* setup signal behavior - SIGTERM */

	act.sa_handler = catch_sigint;
	if (sigaction(SIGTERM, &act, NULL) < 0) {
		perror("sigaction()");
		exit(EXIT_FAILURE);
	}

	/* setup signal behavior - SIGCONT */

	act.sa_handler = catch_sigcont;
	if (sigaction(SIGCONT, &act, NULL) < 0) {
		perror("sigaction(SIGCONT)");
		exit(EXIT_FAILURE);
	}

	/* setup signal behaviour - SIGHUP*/

	act.sa_handler = catch_sigint;
	if (sigaction(SIGHUP, &act, NULL) < 0) {
		perror("sigaction(SIGHUP)");
		exit(EXIT_FAILURE);
	}

	/* setup SIGWINCH */

	act.sa_flags = SA_RESTART;
	act.sa_handler = catch_sigwinch;
	if (sigaction(SIGWINCH, &act, NULL) < 0) {
		perror("sigaction(SIGWINCH)");
		exit(EXIT_FAILURE);
	}

	/* ignore SIGPIPE */

	act.sa_handler = SIG_IGN;
	if (sigaction(SIGPIPE, &act, NULL) < 0) {
		perror("sigaction(SIGPIPE)");
		exit(EXIT_FAILURE);
	}
#endif

	ncu_init();

#ifdef ENABLE_LYRICS_SCREEN
	lyrics_init();
#endif

	/* create mpdclient instance */
	mpd = mpdclient_new();

	/* initialize curses */
	screen_init(mpd);

	/* the main loop */
	main_loop = g_main_loop_new(NULL, FALSE);

	/* watch out for keyboard input */
	GIOChannel *keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
	g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);

#ifdef ENABLE_LIRC
	/* watch out for lirc input */
	int lirc_socket = ncmpc_lirc_open();
	GIOChannel *lirc_channel = NULL;
	if (lirc_socket >= 0) {
		lirc_channel = g_io_channel_unix_new(lirc_socket);
		g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
	}
#endif

#ifndef WIN32
	GIOChannel *sigwinch_channel = NULL;
	if (!pipe(sigwinch_pipes) &&
		!fcntl(sigwinch_pipes[1], F_SETFL, O_NONBLOCK)) {
		sigwinch_channel = g_io_channel_unix_new(sigwinch_pipes[0]);
		g_io_add_watch(sigwinch_channel, G_IO_IN, sigwinch_event, NULL);
	}
	else {
		perror("sigwinch pipe creation failed");
		exit(EXIT_FAILURE);
	}
#endif

	/* attempt to connect */
	reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);

	auto_update_timer();

#ifndef NCMPC_MINI
	check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
#endif

	screen_paint(mpd);

	g_main_loop_run(main_loop);

	/* cleanup */

	cancel_seek_timer();

	disable_update_timer();

	if (reconnect_source_id != 0)
		g_source_remove(reconnect_source_id);

#ifndef NCMPC_MINI
	if (check_key_bindings_source_id != 0)
		g_source_remove(check_key_bindings_source_id);
#endif

	g_main_loop_unref(main_loop);
	g_io_channel_unref(keyboard_channel);
	g_io_channel_unref(sigwinch_channel);
	close(sigwinch_pipes[0]);
	close(sigwinch_pipes[1]);

#ifdef ENABLE_LIRC
	if (lirc_socket >= 0)
		g_io_channel_unref(lirc_channel);
	ncmpc_lirc_close();
#endif

	exit_and_cleanup();

#ifdef ENABLE_LYRICS_SCREEN
	lyrics_deinit();
#endif

	ncu_deinit();
	options_deinit();

	return 0;
}