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Date:: Sat Feb 19 10:16:28 2022 UTC
Message:: add (and handle) cmd `repeat'
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1 /*
2  * Copyright (c) 2022 Omar Polo <op@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/types.h>
18 #include <sys/socket.h>
19 #include <sys/queue.h>
20 #include <sys/uio.h>
21 #include <sys/un.h>
22 
23 #include <errno.h>
24 #include <event.h>
25 #include <limits.h>
26 #include <sndio.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <stdint.h>
30 #include <string.h>
31 #include <syslog.h>
32 #include <unistd.h>
33 #include <imsg.h>
34 
35 #include "amused.h"
36 #include "log.h"
37 #include "playlist.h"
38 #include "xmalloc.h"
39 
40 static struct imsgbuf *ibuf;
41 
42 int	ctl_noarg(struct parse_result *, int, char **);
43 int	ctl_add(struct parse_result *, int, char **);
44 int	ctl_show(struct parse_result *, int, char **);
45 int	ctl_load(struct parse_result *, int, char **);
46 int	ctl_jump(struct parse_result *, int, char **);
47 int	ctl_repeat(struct parse_result *, int, char **);
48 
49 struct ctl_command ctl_commands[] = {
50 	{ "play",	PLAY,		ctl_noarg,	"" },
51 	{ "pause",	PAUSE,		ctl_noarg,	"" },
52 	{ "toggle",	TOGGLE,		ctl_noarg,	"" },
53 	{ "stop",	STOP,		ctl_noarg,	"" },
54 	{ "restart",	RESTART,	ctl_noarg,	"" },
55 	{ "add",	ADD,		ctl_add,	"files...", 1 },
56 	{ "flush",	FLUSH,		ctl_noarg,	"" },
57 	{ "show",	SHOW,		ctl_show,	"[-p]" },
58 	{ "status",	STATUS,		ctl_noarg,	"" },
59 	{ "next",	NEXT,		ctl_noarg,	"" },
60 	{ "prev",	PREV,		ctl_noarg,	"" },
61 	{ "load",	LOAD,		ctl_load,	"[file]", 1 },
62 	{ "jump",	JUMP,		ctl_jump,	"pattern" },
63 	{ "repeat",	REPEAT,		ctl_repeat,	"one|all on|off" },
64 	{ NULL },
65 };
66 
67 __dead void
68 usage(void)
69 {
70 	fprintf(stderr, "usage: %s [-dv] [-s socket]\n", getprogname());
71 	fprintf(stderr, "%s version %s\n", getprogname(), AMUSED_VERSION);
72 	exit(1);
73 }
74 
75 static __dead void
76 ctl_usage(struct ctl_command *ctl)
77 {
78 	fprintf(stderr, "usage: %s [-v] [-s socket] %s %s\n", getprogname(),
79 	    ctl->name, ctl->usage);
80 	exit(1);
81 }
82 
83 static int
84 parse(int argc, char **argv)
85 {
86 	struct ctl_command	*ctl = NULL;
87 	struct parse_result	 res;
88 	int			 i, status;
89 
90 	memset(&res, 0, sizeof(res));
91 
92 	for (i = 0; ctl_commands[i].name != NULL; ++i) {
93 		if (strncmp(ctl_commands[i].name, argv[0], strlen(argv[0]))
94 		    == 0) {
95 			if (ctl != NULL) {
96 				fprintf(stderr,
97 				    "ambiguous argument: %s\n", argv[0]);
98 				usage();
99 			}
100 			ctl = &ctl_commands[i];
101 		}
102 	}
103 
104 	if (ctl == NULL) {
105 		fprintf(stderr, "unknown argument: %s\n", argv[0]);
106 		usage();
107 	}
108 
109 	res.action = ctl->action;
110 	res.ctl = ctl;
111 
112 	if (!ctl->has_pledge) {
113 		/* pledge(2) default if command doesn't have its own */
114 		if (pledge("stdio", NULL) == -1)
115 			fatal("pledge");
116 	}
117 
118 	status = ctl->main(&res, argc, argv);
119 	close(ibuf->fd);
120 	free(ibuf);
121 	return status;
122 }
123 
124 static int
125 enqueue_tracks(char **files)
126 {
127 	char res[PATH_MAX];
128 	int enq = 0;
129 
130 	for (; *files != NULL; ++files) {
131 		memset(&res, 0, sizeof(res));
132 		if (realpath(*files, res) == NULL) {
133 			log_warn("realpath %s", *files);
134 			continue;
135 		}
136 
137 		imsg_compose(ibuf, IMSG_CTL_ADD, 0, 0, -1,
138 		    res, sizeof(res));
139 		enq++;
140 	}
141 
142 	return enq == 0;
143 }
144 
145 static int
146 jump_req(const char *arg)
147 {
148 	char path[PATH_MAX];
149 
150 	memset(path, 0, sizeof(path));
151 	strlcpy(path, arg, sizeof(path));
152 	imsg_compose(ibuf, IMSG_CTL_JUMP, 0, 0, -1, path, sizeof(path));
153 	return 0;
154 }
155 
156 static void
157 print_error_message(const char *prfx, struct imsg *imsg)
158 {
159 	size_t datalen;
160 	char *msg;
161 
162 	datalen = IMSG_DATA_SIZE(*imsg);
163 	if ((msg = calloc(1, datalen)) == NULL)
164 		fatal("calloc %zu", datalen);
165 	memcpy(msg, imsg->data, datalen);
166 	if (datalen == 0 || msg[datalen-1] != '\0')
167 		fatalx("malformed error message");
168 
169 	log_warnx("%s: %s", prfx, msg);
170 	free(msg);
171 }
172 
173 static int
174 show_add(struct imsg *imsg, int *ret, char ***files)
175 {
176 	if (**files == NULL) {
177 		log_warnx("received more replies than file sent");
178 		*ret = 1;
179 		return 1;
180 	}
181 
182 	if (imsg->hdr.type == IMSG_CTL_ERR)
183 		print_error_message(**files, imsg);
184 	else if (imsg->hdr.type == IMSG_CTL_ADD)
185 		log_debug("enqueued %s", **files);
186 	else
187 		fatalx("got invalid message %d", imsg->hdr.type);
188 
189 	(*files)++;
190 	return (**files) == NULL;
191 }
192 
193 static int
194 show_complete(struct parse_result *res, struct imsg *imsg, int *ret)
195 {
196 	struct player_status s;
197 	size_t datalen;
198 
199 	if (imsg->hdr.type == IMSG_CTL_ERR) {
200 		print_error_message("show failed", imsg);
201 		*ret = 1;
202 		return 1;
203 	}
204 
205 	datalen = IMSG_DATA_SIZE(*imsg);
206 	if (datalen == 0)
207 		return 1;
208 
209 	if (datalen != sizeof(s))
210 		fatalx("%s: data size mismatch", __func__);
211 	memcpy(&s, imsg->data, sizeof(s));
212 	if (s.path[sizeof(s.path)-1] != '\0')
213 		fatalx("%s: data corrupted?", __func__);
214 
215 	if (res->pretty)
216 		printf("%c ", s.status == STATE_PLAYING ? '>' : ' ');
217 	printf("%s\n", s.path);
218 	return 0;
219 }
220 
221 static int
222 show_status(struct imsg *imsg, int *ret)
223 {
224 	struct player_status s;
225 	size_t datalen;
226 
227 	if (imsg->hdr.type == IMSG_CTL_ERR) {
228 		print_error_message("show failed", imsg);
229 		*ret = 1;
230 		return 1;
231 	}
232 
233 	if (imsg->hdr.type != IMSG_CTL_STATUS)
234 		fatalx("%s: got wrong reply", __func__);
235 
236 	datalen = IMSG_DATA_SIZE(*imsg);
237 	if (datalen != sizeof(s))
238 		fatalx("%s: data size mismatch", __func__);
239 	memcpy(&s, imsg->data, sizeof(s));
240 	if (s.path[sizeof(s.path)-1] != '\0')
241 		fatalx("%s: data corrupted?", __func__);
242 
243 	switch (s.status) {
244 	case STATE_STOPPED:
245 		printf("stopped ");
246 		break;
247 	case STATE_PLAYING:
248 		printf("playing ");
249 		break;
250 	case STATE_PAUSED:
251 		printf("paused ");
252 		break;
253 	default:
254 		printf("unknown ");
255 		break;
256 	}
257 
258 	printf("%s\n", s.path);
259 	return 1;
260 }
261 
262 static int
263 show_load(struct parse_result *res, struct imsg *imsg, int *ret)
264 {
265 	FILE		*f;
266 	const char	*file;
267 	char		*line = NULL;
268 	char		 path[PATH_MAX];
269 	size_t		 linesize = 0;
270 	ssize_t		 linelen;
271 	int		 any = 0;
272 
273 	if (imsg->hdr.type == IMSG_CTL_ERR) {
274 		print_error_message("load failed", imsg);
275 		*ret = 1;
276 		return 1;
277 	}
278 
279 	if (imsg->hdr.type == IMSG_CTL_ADD)
280 		return 0;
281 
282 	if (imsg->hdr.type == IMSG_CTL_COMMIT)
283 		return 1;
284 
285 	if (imsg->hdr.type != IMSG_CTL_BEGIN)
286 		fatalx("got unexpected message %d", imsg->hdr.type);
287 
288 	if (res->file == NULL)
289 		f = stdin;
290 	else if ((f = fopen(res->file, "r")) == NULL) {
291 		log_warn("can't open %s", res->file);
292 		*ret = 1;
293 		return 1;
294 	}
295 
296 	while ((linelen = getline(&line, &linesize, f)) != -1) {
297 		if (linelen == 0)
298 			continue;
299 		line[linelen-1] = '\0';
300 		file = line;
301 		if (file[0] == '>' && file[1] == ' ')
302 			file += 2;
303 		if (file[0] == ' ' && file[1] == ' ')
304 			file += 2;
305 
306 		memset(&path, 0, sizeof(path));
307 		if (realpath(file, path) == NULL) {
308 			log_warn("realpath %s", file);
309 			continue;
310 		}
311 
312 		any++;
313 		imsg_compose(ibuf, IMSG_CTL_ADD, 0, 0, -1,
314 		    path, sizeof(path));
315 	}
316 
317 	free(line);
318 	if (ferror(f))
319 		fatal("getline");
320 	fclose(f);
321 
322 	if (!any) {
323 		*ret = 1;
324 		return 1;
325 	}
326 
327 	imsg_compose(ibuf, IMSG_CTL_COMMIT, 0, 0, -1,
328 	    NULL, 0);
329 	imsg_flush(ibuf);
330 	return 0;
331 }
332 
333 static int
334 ctlaction(struct parse_result *res)
335 {
336 	struct imsg imsg;
337 	ssize_t n;
338 	int ret = 0, done = 1;
339 	char **files;
340 
341 	switch (res->action) {
342 	case PLAY:
343 		done = 0;
344 		imsg_compose(ibuf, IMSG_CTL_PLAY, 0, 0, -1, NULL, 0);
345 		imsg_compose(ibuf, IMSG_CTL_STATUS, 0, 0, -1, NULL, 0);
346 		break;
347 	case PAUSE:
348 		imsg_compose(ibuf, IMSG_CTL_PAUSE, 0, 0, -1, NULL, 0);
349 		break;
350 	case TOGGLE:
351 		done = 0;
352 		imsg_compose(ibuf, IMSG_CTL_TOGGLE_PLAY, 0, 0, -1, NULL, 0);
353 		imsg_compose(ibuf, IMSG_CTL_STATUS, 0, 0, -1, NULL, 0);
354 		break;
355 	case STOP:
356 		imsg_compose(ibuf, IMSG_CTL_STOP, 0, 0, -1, NULL, 0);
357 		break;
358 	case RESTART:
359 		done = 0;
360 		imsg_compose(ibuf, IMSG_CTL_RESTART, 0, 0, -1, NULL, 0);
361 		imsg_compose(ibuf, IMSG_CTL_STATUS, 0, 0, -1, NULL, 0);
362 		break;
363 	case ADD:
364 		done = 0;
365 		files = res->files;
366 		ret = enqueue_tracks(res->files);
367 		break;
368 	case FLUSH:
369 		imsg_compose(ibuf, IMSG_CTL_FLUSH, 0, 0, -1, NULL, 0);
370 		break;
371 	case SHOW:
372 		done = 0;
373 		imsg_compose(ibuf, IMSG_CTL_SHOW, 0, 0, -1, NULL, 0);
374 		break;
375 	case STATUS:
376 		done = 0;
377 		imsg_compose(ibuf, IMSG_CTL_STATUS, 0, 0, -1, NULL, 0);
378 		break;
379 	case NEXT:
380 		done = 0;
381 		imsg_compose(ibuf, IMSG_CTL_NEXT, 0, 0, -1, NULL, 0);
382 		imsg_compose(ibuf, IMSG_CTL_STATUS, 0, 0, -1, NULL, 0);
383 		break;
384 	case PREV:
385 		done = 0;
386 		imsg_compose(ibuf, IMSG_CTL_PREV, 0, 0, -1, NULL, 0);
387 		imsg_compose(ibuf, IMSG_CTL_STATUS, 0, 0, -1, NULL, 0);
388 		break;
389 	case LOAD:
390 		done = 0;
391 		imsg_compose(ibuf, IMSG_CTL_BEGIN, 0, 0, -1, NULL, 0);
392 		break;
393 	case JUMP:
394 		done = 0;
395 		ret = jump_req(res->file);
396 		break;
397 	case REPEAT:
398 		imsg_compose(ibuf, IMSG_CTL_REPEAT, 0, 0, -1,
399 		    &res->rep, sizeof(res->rep));
400 		break;
401 	case NONE:
402 		/* action not expected */
403 		fatalx("invalid action %u", res->action);
404 		break;
405 	}
406 
407 	if (ret != 0)
408 		goto end;
409 
410 	imsg_flush(ibuf);
411 
412 	while (!done) {
413 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
414 			fatalx("imsg_read error");
415 		if (n == 0)
416 			fatalx("pipe closed");
417 
418 		while (!done) {
419 			if ((n = imsg_get(ibuf, &imsg)) == -1)
420 				fatalx("imsg_get error");
421 			if (n == 0)
422 				break;
423 
424 			switch (res->action) {
425 			case ADD:
426 				done = show_add(&imsg, &ret, &files);
427 				break;
428 			case SHOW:
429 				done = show_complete(res, &imsg, &ret);
430 				break;
431 			case PLAY:
432 			case TOGGLE:
433 			case RESTART:
434 			case STATUS:
435 			case NEXT:
436 			case PREV:
437 			case JUMP:
438 				done = show_status(&imsg, &ret);
439 				break;
440 			case LOAD:
441 				done = show_load(res, &imsg, &ret);
442 				break;
443 			default:
444 				done = 1;
445 				break;
446 			}
447 
448 			imsg_free(&imsg);
449 		}
450 	}
451 
452 end:
453 	return ret;
454 }
455 
456 int
457 ctl_noarg(struct parse_result *res, int argc, char **argv)
458 {
459 	if (argc != 1)
460 		ctl_usage(res->ctl);
461 	return ctlaction(res);
462 }
463 
464 int
465 ctl_add(struct parse_result *res, int argc, char **argv)
466 {
467 	if (argc < 2)
468 		ctl_usage(res->ctl);
469 	res->files = argv+1;
470 
471 	if (pledge("stdio rpath", NULL) == -1)
472 		fatal("pledge");
473 
474 	return ctlaction(res);
475 }
476 
477 int
478 ctl_show(struct parse_result *res, int argc, char **argv)
479 {
480 	int ch;
481 
482 	while ((ch = getopt(argc, argv, "p")) != -1) {
483 		switch (ch) {
484 		case 'p':
485 			res->pretty = 1;
486 			break;
487 		default:
488 			ctl_usage(res->ctl);
489 		}
490 	}
491 
492 	return ctlaction(res);
493 }
494 
495 int
496 ctl_load(struct parse_result *res, int argc, char **argv)
497 {
498 	if (argc < 2)
499 		res->file = NULL;
500 	else if (argc == 2)
501 		res->file = argv[1];
502 	else
503 		ctl_usage(res->ctl);
504 
505 	if (pledge("stdio rpath", NULL) == -1)
506 		fatal("pledge");
507 
508 	return ctlaction(res);
509 }
510 
511 int
512 ctl_jump(struct parse_result *res, int argc, char **argv)
513 {
514 	int ch;
515 
516 	while ((ch = getopt(argc, argv, "")) != -1)
517 		ctl_usage(res->ctl);
518 	argc -= optind;
519 	argv += optind;
520 
521 	if (argc != 1)
522 		ctl_usage(res->ctl);
523 
524 	res->file = argv[0];
525 	return ctlaction(res);
526 }
527 
528 int
529 ctl_repeat(struct parse_result *res, int argc, char **argv)
530 {
531 	int ch, b;
532 
533 	while ((ch = getopt(argc, argv, "")) != -1)
534 		ctl_usage(res->ctl);
535 	argc -= optind;
536 	argv += optind;
537 
538 	if (argc != 2)
539 		ctl_usage(res->ctl);
540 
541 	if (!strcmp(argv[1], "on"))
542 		b = 1;
543 	else if (!strcmp(argv[1], "off"))
544 		b = 0;
545 	else
546 		ctl_usage(res->ctl);
547 
548 	res->rep.repeat_one = -1;
549 	res->rep.repeat_all = -1;
550 	if (!strcmp(argv[0], "one"))
551 		res->rep.repeat_one = b;
552 	else if (!strcmp(argv[0], "all"))
553 		res->rep.repeat_all = b;
554 	else
555 		ctl_usage(res->ctl);
556 
557 	return ctlaction(res);
558 }
559 
560 static int
561 sockconn(void)
562 {
563 	struct sockaddr_un	sun;
564 	int			sock, saved_errno;
565 
566 	if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
567 		fatal("socket");
568 
569 	memset(&sun, 0, sizeof(sun));
570 	sun.sun_family = AF_UNIX;
571 	strlcpy(sun.sun_path, csock, sizeof(sun.sun_path));
572 	if (connect(sock, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
573 		saved_errno = errno;
574 		close(sock);
575 		errno = saved_errno;
576 		return -1;
577 	}
578 
579 	return sock;
580 }
581 
582 __dead void
583 ctl(int argc, char **argv)
584 {
585 	int ctl_sock, i = 0;
586 
587 	log_init(1, LOG_DAEMON);
588 	log_setverbose(verbose);
589 
590 	do {
591 		struct timespec	ts = { 0, 50000000 }; /* 0.05 seconds */
592 
593 		if ((ctl_sock = sockconn()) != -1)
594 			break;
595 		if (errno != ENOENT && errno != ECONNREFUSED)
596 			fatal("connect %s", csock);
597 
598 		if (i == 0)
599 			spawn_daemon();
600 
601 		nanosleep(&ts, NULL);
602 	} while (++i < 20);
603 
604 	if (ctl_sock == -1)
605 		fatalx("failed to connect to the daemon");
606 
607 	ibuf = xmalloc(sizeof(*ibuf));
608 	imsg_init(ibuf, ctl_sock);
609 
610 	optreset = 1;
611 	optind = 1;
612 
613 	exit(parse(argc, argv));
614 }