Blob
Date:
Sat Jun 11 07:57:14 2022 UTC
Message:
skip every non-regular file not only directories... I guess we can't do much even with sockets, fifos or character devices. (symbolic links are still supported since we follow them) 
1
/*

2
 * Copyright (c) 2022 Omar Polo <op@openbsd.org>

3
 *

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 * Permission to use, copy, modify, and distribute this software for any

5
 * purpose with or without fee is hereby granted, provided that the above

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 * copyright notice and this permission notice appear in all copies.

7
 *

8
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

10
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

15
 */

17
#include <sys/types.h>

18
#include <sys/queue.h>

19
#include <sys/socket.h>

20
#include <sys/stat.h>

21
#include <sys/uio.h>

22
#include <sys/wait.h>

24
#include <event.h>

25
#include <errno.h>

26
#include <fcntl.h>

27
#include <limits.h>

28
#include <signal.h>

29
#include <stdio.h>

30
#include <stdlib.h>

31
#include <stdint.h>

32
#include <string.h>

33
#include <syslog.h>

34
#include <unistd.h>

35
#include <imsg.h>

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#include "amused.h"

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#include "control.h"

39
#include "log.h"

40
#include "playlist.h"

41
#include "xmalloc.h"

43
char		*csock = NULL;

44
int		 debug;

45
int		 verbose;

46
struct imsgev	*iev_player;

48
const char	*argv0;

49
pid_t		 player_pid;

50
struct event	 ev_sigint;

51
struct event	 ev_sigterm;

53
enum amused_process {

54
	PROC_MAIN,

55
	PROC_PLAYER,

56
};

58
__dead void

59
main_shutdown(void)

60
{

61
	pid_t	pid;

62
	int	status;

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	/* close pipes. */

65
	msgbuf_clear(&iev_player->ibuf.w);

66
	close(iev_player->ibuf.fd);

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	free(iev_player);

69
	log_debug("waiting for children to terminate");

70
	do {

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		pid = wait(&status);

72
		if (pid == -1) {

73
			if (errno != EINTR && errno != ECHILD)

74
				fatal("wait");

75
		} else if (WIFSIGNALED(status))

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			log_warnx("player terminated; signal %d",

77
			    WTERMSIG(status));

78
	} while (pid != -1 || (pid == -1 && errno == EINTR));

80
	log_info("terminating");

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	exit(0);

82
}

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static void

85
main_sig_handler(int sig, short event, void *arg)

86
{

87
	/*

88
	 * Normal signal handler rules don't apply because libevent

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	 * decouples for us.

90
	 */

92
	switch (sig) {

93
	case SIGTERM:

94
	case SIGINT:

95
		main_shutdown();

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		break;

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	default:

98
		fatalx("unexpected signal %d", sig);

99
	}

100
}

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static void

103
main_dispatch_player(int sig, short event, void *d)

104
{

105
	struct imsgev	*iev = d;

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	struct imsgbuf	*ibuf = &iev->ibuf;

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	struct imsg	 imsg;

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	ssize_t		 n;

109
	int		 shut = 0;

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	if (event & EV_READ) {

112
		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)

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			fatal("imsg_read error");

114
		if (n == 0)	/* Connection closed */

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			shut = 1;

116
	}

117
	if (event & EV_WRITE) {

118
		if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)

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			fatal("msgbuf_write");

120
		if (n == 0)	/* Connection closed */

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			shut = 1;

122
	}

124
	for (;;) {

125
		if ((n = imsg_get(ibuf, &imsg)) == -1)

126
			fatal("imsg_get");

127
		if (n == 0)	/* No more messages. */

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			break;

130
		switch (imsg.hdr.type) {

131
		case IMSG_ERR:

132
			log_warnx("failed to play, skipping %s", current_song);

133
			playlist_dropcurrent();

134
			/* fallthrough */

135
		case IMSG_EOF:

136
			if (repeat_one && current_song != NULL) {

137
				if (main_play_song(current_song))

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					break;

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				playlist_dropcurrent();

140
			}

141
			main_playlist_advance();

142
			if (play_state == STATE_PLAYING)

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				control_notify(NULL, IMSG_CTL_NEXT);

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			else

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				control_notify(NULL, IMSG_CTL_STOP);

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			break;

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		default:

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			log_debug("%s: error handling imsg %d", __func__,

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			    imsg.hdr.type);

150
			break;

151
		}

152
		imsg_free(&imsg);

153
	}

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	if (!shut)

156
		imsg_event_add(iev);

157
	else {

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		/* This pipe is dead.  Remove its event handler. */

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		event_del(&iev->ev);

160
		event_loopexit(NULL);

161
	}

162
}

164
static pid_t

165
start_child(enum amused_process proc, int fd)

166
{

167
	const char	*argv[7];

168
	int		 argc = 0;

169
	pid_t		 pid;

171
	if (fd == -1 && debug)

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		goto exec;

174
	switch (pid = fork()) {

175
	case -1:

176
		fatal("cannot fork");

177
	case 0:

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		break;

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	default:

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		close(fd);

181
		return pid;

182
	}

184
	if (fd != 3) {

185
		if (fd != -1 && dup2(fd, 3) == -1)

186
			fatal("cannot setup imsg fd");

187
	} else if (fcntl(F_SETFD, 0) == -1)

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		fatal("cannot setup imsg fd");

190
exec:

191
	argv[argc++] = argv0;

193
	switch (proc) {

194
	case PROC_MAIN:

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		argv[argc++] = "-s";

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		argv[argc++] = csock;

197
		argv[argc++] = "-Tm";

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		break;

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	case PROC_PLAYER:

200
		argv[argc++] = "-Tp";

201
		break;

202
	}

204
	if (debug)

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		argv[argc++] = "-d";

206
	if (verbose)

207
		argv[argc++] = "-v";

208
	argv[argc++] = NULL;

210
	/* obnoxious casts */

211
	execvp(argv0, (char *const *)argv);

212
	fatal("execvp %s", argv0);

213
}

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/* daemon main routine */

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static __dead void

217
amused_main(void)

218
{

219
	int	 pipe_main2player[2];

220
	int	 control_fd;

222
	log_init(debug, LOG_DAEMON);

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	log_setverbose(verbose);

224
	log_procinit("main");

226
	if (!debug)

227
		daemon(1, 0);

229
	if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,

230
	    PF_UNSPEC, pipe_main2player) == -1)

231
		fatal("socketpair");

233
	player_pid = start_child(PROC_PLAYER, pipe_main2player[1]);

235
	event_init();

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	signal_set(&ev_sigint, SIGINT, main_sig_handler, NULL);

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	signal_set(&ev_sigterm, SIGTERM, main_sig_handler, NULL);

240
	signal_add(&ev_sigint, NULL);

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	signal_add(&ev_sigterm, NULL);

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	signal(SIGHUP, SIG_IGN);

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	signal(SIGCHLD, SIG_IGN);

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	signal(SIGPIPE, SIG_IGN);

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	iev_player = xmalloc(sizeof(*iev_player));

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	imsg_init(&iev_player->ibuf, pipe_main2player[0]);

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	iev_player->handler = main_dispatch_player;

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	iev_player->events = EV_READ;

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	event_set(&iev_player->ev, iev_player->ibuf.fd, iev_player->events,

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	    iev_player->handler, iev_player);

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	event_add(&iev_player->ev, NULL);

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	if ((control_fd = control_init(csock)) == -1)

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		fatal("control socket setup failed %s", csock);

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	control_listen(control_fd);

259
	if (pledge("stdio rpath unix sendfd", NULL) == -1)

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		fatal("pledge");

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	log_info("startup");

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	event_dispatch();

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	main_shutdown();

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}

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int

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main(int argc, char **argv)

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{

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	int ch, proc = -1;

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	log_init(1, LOG_DAEMON);	/* Log to stderr until daemonized */

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	log_setverbose(1);

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	argv0 = argv[0];

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	if (argv0 == NULL)

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		argv0 = "amused";

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	while ((ch = getopt(argc, argv, "ds:T:v")) != -1) {

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		switch (ch) {

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		case 'd':

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			debug = 1;

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			break;

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		case 's':

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			free(csock);

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			csock = xstrdup(optarg);

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			break;

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		case 'T':

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			switch (*optarg) {

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			case 'm':

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				proc = PROC_MAIN;

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				break;

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			case 'p':

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				proc = PROC_PLAYER;

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				break;

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			default:

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				usage();

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			}

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			break;

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		case 'v':

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			verbose++;

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			break;

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		default:

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			usage();

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		}

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	}

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	argv += optind;

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	argc -= optind;

310
	if (proc == PROC_MAIN)

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		amused_main();

312
	if (proc == PROC_PLAYER)

313
		exit(player(debug, verbose));

315
	if (csock == NULL)

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		xasprintf(&csock, "/tmp/amused-%d", getuid());

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	if (argc > 0)

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		debug = 0;

321
	ctl(argc, argv);

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}

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void

325
spawn_daemon(void)

326
{

327
	start_child(PROC_MAIN, -1);

328
}

330
void

331
imsg_event_add(struct imsgev *iev)

332
{

333
	iev->events = EV_READ;

334
	if (iev->ibuf.w.queued)

335
		iev->events |= EV_WRITE;

337
	event_del(&iev->ev);

338
	event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev);

339
	event_add(&iev->ev, NULL);

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}

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int

343
imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,

344
    pid_t pid, int fd, const void *data, uint16_t datalen)

345
{

346
	int ret;

348
	if ((ret = imsg_compose(&iev->ibuf, type, peerid, pid, fd, data,

349
	    datalen)) != -1)

350
		imsg_event_add(iev);

352
	return ret;

353
}

355
int

356
main_send_player(uint16_t type, int fd)

357
{

358
	return imsg_compose_event(iev_player, type, 0, 0, fd, NULL, 0);

359
}

361
int

362
main_play_song(const char *path)

363
{

364
	struct stat sb;

365
	int fd;

367
	if ((fd = open(path, O_RDONLY)) == -1) {

368
		log_warn("open %s", path);

369
		return 0;

370
	}

372
	if (fstat(fd, &sb) == -1) {

373
		log_warn("failed to stat %s", path);

374
		close(fd);

375
		return 0;

376
	}

378
	if (!S_ISREG(sb.st_mode)) {

379
		log_info("skipping non-regular file: %s", path);

380
		close(fd);

381
		return 0;

382
	}

384
	play_state = STATE_PLAYING;

385
	main_send_player(IMSG_PLAY, fd);

386
	return 1;

387
}

389
void

390
main_playlist_jump(struct imsgev *iev, struct imsg *imsg)

391
{

392
	size_t datalen;

393
	char arg[PATH_MAX];

394
	const char *song;

396
	datalen = IMSG_DATA_SIZE(*imsg);

397
	if (datalen != sizeof(arg)) {

398
		main_senderr(iev, "wrong size");

399
		return;

400
	}

402
	memcpy(arg, imsg->data, sizeof(arg));

403
	if (arg[sizeof(arg)-1] != '\0') {

404
		main_senderr(iev, "data corrupted");

405
		return;

406
	}

408
	song = playlist_jump(arg);

409
	if (song == NULL) {

410
		main_senderr(iev, "not found");

411
		return;

412
	}

414
	main_send_player(IMSG_STOP, -1);

415
	if (!main_play_song(song)) {

416
		main_senderr(iev, "can't play");

417
		playlist_dropcurrent();

418
		main_playlist_advance();

419
		return;

420
	}

422
	main_send_status(iev);

423
}

425
void

426
main_playlist_resume(void)

427
{

428
	const char *song;

430
	if ((song = current_song) == NULL)

431
		song = playlist_advance();

433
	for (; song != NULL; song = playlist_advance()) {

434
		if (main_play_song(song))

435
			return;

437
		playlist_dropcurrent();

438
	}

439
}

441
void

442
main_playlist_advance(void)

443
{

444
	const char *song;

446
	for (;;) {

447
		song = playlist_advance();

448
		if (song == NULL)

449
			return;

451
		if (main_play_song(song))

452
			break;

454
		playlist_dropcurrent();

455
	}

456
}

458
void

459
main_playlist_previous(void)

460
{

461
	const char *song;

463
	for (;;) {

464
		song = playlist_previous();

465
		if (song == NULL)

466
			return;

468
		if (main_play_song(song))

469
			break;

471
		playlist_dropcurrent();

472
	}

473
}

475
void

476
main_restart_track(void)

477
{

478
	if (current_song == NULL)

479
		return;

481
	if (main_play_song(current_song))

482
		return;

484
	playlist_dropcurrent();

485
	main_playlist_advance();

486
}

488
void

489
main_senderr(struct imsgev *iev, const char *msg)

490
{

491
	imsg_compose_event(iev, IMSG_CTL_ERR, 0, 0, -1,

492
	    msg, strlen(msg)+1);

493
}

495
void

496
main_enqueue(int tx, struct playlist *px, struct imsgev *iev,

497
    struct imsg *imsg)

498
{

499
	size_t datalen;

500
	char path[PATH_MAX];

501
	const char *err = NULL;

503
	datalen = IMSG_DATA_SIZE(*imsg);

504
	if (datalen != sizeof(path)) {

505
		err = "data size mismatch";

506
		goto err;

507
	}

509
	memcpy(path, imsg->data, sizeof(path));

510
	if (path[datalen-1] != '\0') {

511
		err = "malformed data";

512
		goto err;

513
	}

515
	if (tx)

516
		playlist_push(px, path);

517
	else

518
		playlist_enqueue(path);

519
	imsg_compose_event(iev, IMSG_CTL_ADD, 0, 0, -1, path, sizeof(path));

520
	return;

521
err:

522
	main_senderr(iev, err);

523
}

525
void

526
main_send_playlist(struct imsgev *iev)

527
{

528
	struct player_status s;

529
	size_t i;

531
	for (i = 0; i < playlist.len; ++i) {

532
		memset(&s, 0, sizeof(s));

533
		strlcpy(s.path, playlist.songs[i], sizeof(s.path));

534
		s.status = play_off == i ? STATE_PLAYING : STATE_STOPPED;

535
		imsg_compose_event(iev, IMSG_CTL_SHOW, 0, 0, -1, &s,

536
		    sizeof(s));

537
	}

539
	imsg_compose_event(iev, IMSG_CTL_SHOW, 0, 0, -1, NULL, 0);

540
}

542
void

543
main_send_status(struct imsgev *iev)

544
{

545
	struct player_status s;

547
	memset(&s, 0, sizeof(s));

549
	if (current_song != NULL)

550
		strlcpy(s.path, current_song, sizeof(s.path));

551
	s.status = play_state;

552
	s.rp.repeat_all = repeat_all;

553
	s.rp.repeat_one = repeat_one;

555
	imsg_compose_event(iev, IMSG_CTL_STATUS, 0, 0, -1, &s, sizeof(s));

556
}
Omar Polo