audiod: Force status dump on slot changes.
[paraslash.git] / audiod.c
1 /*
2 * Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file audiod.c The paraslash's audio daemon. */
8
9 #include <netinet/in.h>
10 #include <sys/socket.h>
11 #include <regex.h>
12 #include <sys/types.h>
13 #include <arpa/inet.h>
14 #include <sys/un.h>
15 #include <netdb.h>
16 #include <signal.h>
17 #include <pwd.h>
18
19 #include "para.h"
20 #include "error.h"
21 #include "crypt.h"
22 #include "audiod.cmdline.h"
23 #include "list.h"
24 #include "sched.h"
25 #include "ggo.h"
26 #include "buffer_tree.h"
27 #include "recv.h"
28 #include "filter.h"
29 #include "grab_client.h"
30 #include "client.cmdline.h"
31 #include "client.h"
32 #include "audiod.h"
33 #include "net.h"
34 #include "daemon.h"
35 #include "string.h"
36 #include "fd.h"
37 #include "write.h"
38 #include "write_common.h"
39 #include "signal.h"
40 #include "version.h"
41
42 __printf_2_3 void (*para_log)(int, const char*, ...) = daemon_log;
43 /** define the array of error lists needed by para_audiod */
44 INIT_AUDIOD_ERRLISTS;
45 /** define the array containing all supported audio formats */
46 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
47
48 DEFINE_RECEIVER_ARRAY;
49
50 /** Defines how audiod handles one supported audio format. */
51 struct audio_format_info {
52 /** pointer to the receiver for this audio format */
53 struct receiver *receiver;
54 /** the receiver configuration */
55 void *receiver_conf;
56 /** the number of filters that should be activated for this audio format */
57 unsigned int num_filters;
58 /** Array of filter numbers to be activated. */
59 unsigned *filter_nums;
60 /** Pointer to the array of filter configurations. */
61 void **filter_conf;
62 /** the number of filters that should be activated for this audio format */
63 unsigned int num_writers;
64 /** Array of writer numbers to be activated. */
65 int *writer_nums;
66 /** pointer to the array of writer configurations */
67 void **writer_conf;
68 /** do not start receiver/filters/writer before this time */
69 struct timeval restart_barrier;
70 };
71
72 /* Describes one instance of a receiver-filter-writer chain. */
73 struct slot_info {
74 /* Number of the audio format in this slot. */
75 int format;
76 /* The stream_start status item announced by para_server. */
77 struct timeval server_stream_start;
78 /* The offset status item announced by para_server. */
79 unsigned offset_seconds;
80 /* The seconds_total status item announced by para_server. */
81 unsigned seconds_total;
82 /* The receiver info associated with this slot. */
83 struct receiver_node *receiver_node;
84 /* The array of filter nodes. */
85 struct filter_node *fns;
86 /* The array of writers attached to the last filter. */
87 struct writer_node *wns;
88 };
89
90 /** Maximal number of simultaneous instances. */
91 #define MAX_STREAM_SLOTS 5
92
93 /** Iterate over all slots. */
94 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
95
96 /**
97 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
98 * be associated with a receiver/filter/writer triple. This array holds all
99 * information on the status of these slots.
100 *
101 * \sa struct slot_info
102 * */
103 struct slot_info slot[MAX_STREAM_SLOTS];
104
105 /** The vss status flags audiod is interested in. */
106 enum vss_status_flags {
107 /** Whether the 'N' flag is set. */
108 VSS_STATUS_FLAG_NEXT = 1,
109 /** The 'P' flag is set. */
110 VSS_STATUS_FLAG_PLAYING = 2,
111 };
112
113 /**
114 * The scheduler instance of para_audiod.
115 *
116 * This is needed also in audiod_command.c (for the tasks command), so it can
117 * not be made static.
118 */
119 struct sched sched = {.max_fileno = 0};
120
121 /* The task for obtaining para_server's status (para_client stat). */
122 struct status_task {
123 /** The associated task structure of audiod. */
124 struct task *task;
125 /** Client data associated with the stat task. */
126 struct client_task *ct;
127 /** Do not restart client command until this time. */
128 struct timeval restart_barrier;
129 /** Last time we received status data from para_server. */
130 struct timeval last_status_read;
131 size_t min_iqs;
132 /** The offset value announced by para_server. */
133 int offset_seconds;
134 /** The length of the current audio file as announced by para_server. */
135 int length_seconds;
136 /** The start of the current stream from the view of para_server. */
137 struct timeval server_stream_start;
138 /** The average time deviation between para_server and para_audiod. */
139 struct timeval sa_time_diff;
140 /** Whether client time is ahead of server time. */
141 int sa_time_diff_sign;
142 /** The 'P' and the 'N' flags as announced by para_server. */
143 enum vss_status_flags vss_status;
144 /** Number of times the clock difference is to be checked. */
145 unsigned clock_diff_count;
146 /** When to start the next check for clock difference. */
147 struct timeval clock_diff_barrier;
148 /** Number of the audio format as announced by para_server. */
149 int current_audio_format_num;
150 /* The status task btrn is the child of the client task. */
151 struct btr_node *btrn;
152 };
153
154 /** The array of status items sent by para_server. */
155 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
156
157 /**
158 * the current mode of operation of which can be changed by the on/off/cycle
159 * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
160 */
161 int audiod_status = AUDIOD_ON;
162
163 /**
164 * the gengetopt args_info struct that holds information on all command line
165 * arguments
166 */
167 struct audiod_args_info conf;
168
169 static char *socket_name;
170 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
171
172 static struct signal_task *signal_task;
173
174 static struct status_task status_task_struct;
175
176 static uid_t *uid_whitelist;
177
178 /**
179 * the task that calls the status command of para_server
180 *
181 * \sa struct status_task
182 */
183 static struct status_task *stat_task = &status_task_struct;
184
185 /*
186 * The task for handling audiod commands.
187 *
188 * We need two listening sockets for backward compability: on Linux systems
189 * fd[0] is an abstract socket (more precisely, a socket bound to an address in
190 * the abstract namespace), and fd[1] is the usual pathname socket. On other
191 * systems, fd[0] is negative, and only the pathname socket is used.
192 *
193 * For 0.5.x we accept connections on both sockets to make sure that old
194 * para_audioc versions can still connect. New versions use only the abstract
195 * socket. Hence after v0.6.0 we can go back to a single socket, either an
196 * abstract one (Linux) or a pathname socket (all other systems).
197 */
198 struct command_task {
199 /** The local listening sockets. */
200 int fd[2];
201 /** the associated task structure */
202 struct task *task;
203 };
204
205 /** iterate over all supported audio formats */
206 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
207
208 /**
209 * Get the audio format number.
210 *
211 * \param name The name of the audio format.
212 *
213 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
214 * \a name is not a supported audio format.
215 */
216 static int get_audio_format_num(const char *name)
217 {
218 int i;
219
220 while (para_isspace(*name))
221 name++;
222 FOR_EACH_AUDIO_FORMAT(i)
223 if (!strcmp(name, audio_formats[i]))
224 return i;
225 return -E_UNSUPPORTED_AUDIO_FORMAT;
226 }
227
228 /**
229 * Return the flags for the \a decoder_flags status item.
230 *
231 * Allocates a string which contains one octal digit per slot. Bit zero (value
232 * 1) is set if a receiver is active. Bit one (value 2) and bit three (value 4)
233 * have the analogous meaning for filter and writer, respectively.
234 *
235 * \return String that must be freed by the caller.
236 */
237 __malloc char *audiod_get_decoder_flags(void)
238 {
239 int i;
240 char flags[MAX_STREAM_SLOTS + 1];
241
242 FOR_EACH_SLOT(i) {
243 struct slot_info *s = &slot[i];
244 char flag = '0';
245 if (s->receiver_node)
246 flag += 1;
247 if (s->fns)
248 flag += 2;
249 if (s->wns)
250 flag += 4;
251 flags[i] = flag;
252 }
253 flags[MAX_STREAM_SLOTS] = '\0';
254 return para_strdup(flags);
255 }
256
257 static int get_matching_audio_format_nums(const char *re)
258 {
259 int i, ret;
260 regex_t preg;
261
262 ret = para_regcomp(&preg, re, REG_EXTENDED | REG_NOSUB);
263 if (ret < 0)
264 return ret;
265 ret = 0;
266 FOR_EACH_AUDIO_FORMAT(i)
267 if (regexec(&preg, audio_formats[i], 0, NULL, 0) != REG_NOMATCH)
268 ret |= (1 << i);
269 regfree(&preg);
270 return ret;
271 }
272
273 static int get_play_time_slot_num(void)
274 {
275 int i, oldest_slot = -1;
276 struct timeval oldest_wstime = {0, 0};
277
278 FOR_EACH_SLOT(i) {
279 struct slot_info *s = &slot[i];
280 struct timeval wstime;
281 if (!s->wns || !s->wns[0].btrn)
282 continue;
283 btr_get_node_start(s->wns[0].btrn, &wstime);
284 if (oldest_slot >= 0 && tv_diff(&wstime, &oldest_wstime, NULL) > 0)
285 continue;
286 oldest_wstime = wstime;
287 oldest_slot = i;
288 }
289 return oldest_slot;
290 }
291
292 /**
293 * Compute the play time based on information of the current slot.
294 *
295 * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
296 * from the status items received from para_server and the start time of the
297 * (first) writer of the current slot.
298 *
299 * It has to take into account that the stream was probably not started at
300 * the beginning of the file, that the clock between the server and the client
301 * host may differ and that playback of the stream was delayed, e.g. because
302 * the prebuffer filter is used in the filter configuration.
303 *
304 * If no writer is active, for example because para_audiod runs in standby
305 * mode, an approximation based only on the status items is computed and the
306 * returned string is prefixed with "~".
307 *
308 * \return A string that must be freed by the caller.
309 */
310 char *get_time_string(void)
311 {
312 int ret, seconds = 0, length = stat_task->length_seconds;
313 struct timeval *tmp, sum, sss, /* server stream start */
314 rstime, /* receiver start time */
315 wstime, /* writer start time */
316 wtime, /* now - writer start */
317 rskip; /* receiver start - sss */
318 int slot_num = get_play_time_slot_num();
319 struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
320 char *msg;
321
322 if (audiod_status == AUDIOD_OFF)
323 goto empty;
324 if (stat_task->server_stream_start.tv_sec == 0) {
325 if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
326 goto out; /* server is about to change file */
327 if (length > 0) /* paused */
328 return NULL;
329 goto empty; /* stopped */
330 }
331 /*
332 * Valid status items and playing, set length and tmp to the stream
333 * start. We use the slot info and fall back to the info from current
334 * status items if no slot info is available.
335 */
336 tmp = &stat_task->server_stream_start;
337 if (s && s->wns && s->wns[0].btrn) { /* writer active in this slot */
338 btr_get_node_start(s->wns[0].btrn, &wstime);
339 if (wstime.tv_sec != 0) { /* writer wrote something */
340 if (s->server_stream_start.tv_sec == 0) {
341 /* copy status info to slot */
342 s->server_stream_start = stat_task->server_stream_start;
343 s->offset_seconds = stat_task->offset_seconds;
344 s->seconds_total = stat_task->length_seconds;
345 }
346 length = s->seconds_total;
347 tmp = &s->server_stream_start;
348 }
349 }
350 if (stat_task->sa_time_diff_sign > 0)
351 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
352 else
353 tv_add(tmp, &stat_task->sa_time_diff, &sss);
354 if (!s || !s->wns || !s->wns[0].btrn || wstime.tv_sec == 0) {
355 struct timeval diff;
356 tv_diff(now, &sss, &diff);
357 seconds = diff.tv_sec + stat_task->offset_seconds;
358 goto out;
359 }
360 tv_diff(now, &wstime, &wtime);
361 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
362 seconds = s->offset_seconds;
363 if (s->receiver_node->btrn) {
364 btr_get_node_start(s->receiver_node->btrn, &rstime);
365 ret = tv_diff(&rstime, &sss, &rskip);
366 if (ret > 0) { /* audiod was started in the middle of the stream */
367 tv_add(&wtime, &rskip, &sum);
368 seconds += sum.tv_sec;
369 } else
370 seconds += wtime.tv_sec;
371 } else
372 seconds += wtime.tv_sec;
373 out:
374 seconds = PARA_MIN(seconds, length);
375 seconds = PARA_MAX(seconds, 0);
376 msg = make_message(
377 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
378 s? "" : "~",
379 seconds / 60,
380 seconds % 60,
381 (length - seconds) / 60,
382 (length - seconds) % 60,
383 length? (seconds * 100 + length / 2) / length : 0,
384 length / 60,
385 length % 60
386 );
387 //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
388 return msg;
389 empty:
390 return para_strdup(NULL);
391 }
392
393 static void parse_config_or_die(void)
394 {
395 int ret, i;
396 char *config_file;
397 struct audiod_cmdline_parser_params params = {
398 .override = 0,
399 .initialize = 0,
400 .check_required = 1,
401 .check_ambiguity = 0,
402 .print_errors = 1
403 };
404
405 if (conf.config_file_given)
406 config_file = para_strdup(conf.config_file_arg);
407 else {
408 char *home = para_homedir();
409 config_file = make_message("%s/.paraslash/audiod.conf", home);
410 free(home);
411 }
412 ret = file_exists(config_file);
413 if (conf.config_file_given && !ret) {
414 PARA_EMERG_LOG("can not read config file %s\n", config_file);
415 free(config_file);
416 goto err;
417 }
418 if (ret) {
419 audiod_cmdline_parser_config_file(config_file, &conf, &params);
420 daemon_set_loglevel(conf.loglevel_arg);
421 }
422 free(config_file);
423 if (conf.user_allow_given > 0) {
424 uid_whitelist = para_malloc(conf.user_allow_given
425 * sizeof(uid_t));
426 for (i = 0; i < conf.user_allow_given; i++) {
427 int32_t val;
428 struct passwd *pw;
429 ret = para_atoi32(conf.user_allow_arg[i], &val);
430 if (ret >= 0) {
431 uid_whitelist[i] = val;
432 continue;
433 }
434 errno = 0; /* see getpwnam(3) */
435 pw = getpwnam(conf.user_allow_arg[i]);
436 if (!pw) {
437 PARA_EMERG_LOG("invalid username: %s\n",
438 conf.user_allow_arg[i]);
439 goto err;
440 }
441 uid_whitelist[i] = pw->pw_uid;
442 }
443 }
444 return;
445 err:
446 exit(EXIT_FAILURE);
447 }
448
449 static void setup_signal_handling(void)
450 {
451 signal_task = signal_init_or_die();
452 para_install_sighandler(SIGINT);
453 para_install_sighandler(SIGTERM);
454 para_install_sighandler(SIGHUP);
455 para_sigaction(SIGPIPE, SIG_IGN);
456 }
457
458 static void clear_slot(int slot_num)
459 {
460 struct slot_info *s = &slot[slot_num];
461
462 PARA_INFO_LOG("clearing slot %d\n", slot_num);
463 memset(s, 0, sizeof(struct slot_info));
464 s->format = -1;
465 }
466
467 static void close_receiver(int slot_num)
468 {
469 struct slot_info *s = &slot[slot_num];
470 struct audio_format_info *a;
471
472 if (s->format < 0 || !s->receiver_node)
473 return;
474 a = &afi[s->format];
475 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
476 audio_formats[s->format], slot_num);
477 a->receiver->close(s->receiver_node);
478 btr_remove_node(&s->receiver_node->btrn);
479 task_reap(&s->receiver_node->task);
480 free(s->receiver_node);
481 s->receiver_node = NULL;
482 stat_task->current_audio_format_num = -1;
483 tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
484 &a->restart_barrier);
485 }
486
487 static void writer_cleanup(struct writer_node *wn)
488 {
489 struct writer *w;
490
491 if (!wn)
492 return;
493 w = writers + wn->writer_num;
494 PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
495 w->close(wn);
496 btr_remove_node(&wn->btrn);
497 task_reap(&wn->task);
498 }
499
500 static void close_writers(struct slot_info *s)
501 {
502 struct audio_format_info *a;
503 int i;
504
505 if (s->format < 0)
506 return;
507 assert(s->wns);
508 a = afi + s->format;
509 if (a->num_writers == 0)
510 writer_cleanup(s->wns);
511 else {
512 for (i = 0; i < a->num_writers; i++)
513 writer_cleanup(s->wns + i);
514 }
515 free(s->wns);
516 s->wns = NULL;
517 }
518
519 static void close_filters(struct slot_info *s)
520 {
521 int i;
522 struct audio_format_info *a = afi + s->format;
523 if (a->num_filters == 0)
524 return;
525 for (i = a->num_filters - 1; i >= 0; i--) {
526 struct filter_node *fn = s->fns + i;
527 const struct filter *f;
528
529 if (!fn)
530 continue;
531 f = filter_get(fn->filter_num);
532 if (f->close)
533 f->close(fn);
534 btr_remove_node(&fn->btrn);
535 task_reap(&fn->task);
536 }
537 free(s->fns);
538 s->fns = NULL;
539 }
540
541 static void notify_receivers(int error)
542 {
543 int i;
544
545 FOR_EACH_SLOT(i) {
546 struct slot_info *s = slot + i;
547 if (s->format < 0)
548 continue;
549 if (!s->receiver_node)
550 continue;
551 task_notify(s->receiver_node->task, error);
552 }
553 }
554
555 static int get_empty_slot(void)
556 {
557 int i;
558 struct slot_info *s;
559
560 FOR_EACH_SLOT(i) {
561 s = &slot[i];
562 if (s->format < 0) {
563 clear_slot(i);
564 return i;
565 }
566 if (s->wns || s->receiver_node || s->fns)
567 continue;
568 clear_slot(i);
569 return i;
570 }
571 return -E_NO_MORE_SLOTS;
572 }
573
574 static void open_filters(struct slot_info *s)
575 {
576 struct audio_format_info *a = afi + s->format;
577 struct filter_node *fn;
578 int nf = a->num_filters;
579 struct btr_node *parent;
580 int i;
581
582 if (nf == 0)
583 return;
584 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
585 assert(s->fns == NULL);
586 s->fns = para_calloc(nf * sizeof(struct filter_node));
587 parent = s->receiver_node->btrn;
588 for (i = 0; i < nf; i++) {
589 char buf[20];
590 const struct filter *f = filter_get(a->filter_nums[i]);
591 fn = s->fns + i;
592 fn->filter_num = a->filter_nums[i];
593 fn->conf = a->filter_conf[i];
594 fn->btrn = btr_new_node(&(struct btr_node_description)
595 EMBRACE(.name = f->name, .parent = parent,
596 .handler = f->execute, .context = fn));
597
598 f->open(fn);
599 sprintf(buf, "%s (slot %d)", f->name, (int)(s - slot));
600 fn->task = task_register(&(struct task_info) {
601 .name = buf,
602 .pre_select = f->pre_select,
603 .post_select = f->post_select,
604 .context = fn,
605 }, &sched);
606 parent = fn->btrn;
607 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
608 audio_formats[s->format], i, nf, f->name, (int)(s - slot));
609 }
610 }
611
612 static void open_writers(struct slot_info *s)
613 {
614 int i;
615 struct audio_format_info *a = afi + s->format;
616 struct writer_node *wn;
617 struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
618
619 assert(s->wns == NULL);
620 s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
621 * sizeof(struct writer_node));
622 for (i = 0; i < a->num_writers; i++) {
623 wn = s->wns + i;
624 wn->conf = a->writer_conf[i];
625 wn->writer_num = a->writer_nums[i];
626 register_writer_node(wn, parent, &sched);
627 PARA_NOTICE_LOG("%s writer started in slot %d\n",
628 writer_names[a->writer_nums[i]], (int)(s - slot));
629 }
630 }
631
632 /* returns slot num on success */
633 static int open_receiver(int format)
634 {
635 struct audio_format_info *a = &afi[format];
636 struct slot_info *s;
637 int ret, slot_num;
638 struct receiver *r = a->receiver;
639 struct receiver_node *rn;
640
641 tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
642 ret = get_empty_slot();
643 if (ret < 0)
644 return ret;
645 slot_num = ret;
646 rn = para_calloc(sizeof(*rn));
647 rn->receiver = r;
648 rn->conf = a->receiver_conf;
649 rn->btrn = btr_new_node(&(struct btr_node_description)
650 EMBRACE(.name = r->name, .context = rn));
651 ret = r->open(rn);
652 if (ret < 0) {
653 btr_remove_node(&rn->btrn);
654 free(rn);
655 return ret;
656 }
657 s = &slot[slot_num];
658 s->format = format;
659 s->receiver_node = rn;
660 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
661 audio_formats[format], r->name, slot_num);
662 rn->task = task_register(&(struct task_info) {
663 .name = r->name,
664 .pre_select = r->pre_select,
665 .post_select = r->post_select,
666 .context = rn,
667 }, &sched);
668 return slot_num;
669 }
670
671 static bool receiver_running(void)
672 {
673 int i;
674 long unsigned ss1 = stat_task->server_stream_start.tv_sec;
675
676 FOR_EACH_SLOT(i) {
677 struct slot_info *s = &slot[i];
678 long unsigned ss2 = s->server_stream_start.tv_sec;
679
680 if (!s->receiver_node)
681 continue;
682 if (task_status(s->receiver_node->task) >= 0)
683 return true;
684 if (ss1 == ss2)
685 return true;
686 }
687 return false;
688 }
689
690 /**
691 * Return the root node of the current buffer tree.
692 *
693 * This is only used for stream grabbing.
694 *
695 * \return \p NULL if no slot is currently active. If more than one buffer tree
696 * exists, the node corresponding to the most recently started receiver is
697 * returned.
698 */
699 struct btr_node *audiod_get_btr_root(void)
700 {
701 int i, newest_slot = -1;
702 struct timeval newest_rstime = {0, 0};
703
704 FOR_EACH_SLOT(i) {
705 struct slot_info *s = &slot[i];
706 struct timeval rstime;
707 if (!s->receiver_node)
708 continue;
709 if (task_status(s->receiver_node->task) < 0)
710 continue;
711 btr_get_node_start(s->receiver_node->btrn, &rstime);
712 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
713 continue;
714 newest_rstime = rstime;
715 newest_slot = i;
716 }
717 if (newest_slot == -1)
718 return NULL;
719 return slot[newest_slot].receiver_node->btrn;
720 }
721
722 /* whether a new instance of a decoder should be started. */
723 static bool must_start_decoder(void)
724 {
725 int cafn = stat_task->current_audio_format_num;
726 unsigned vs = stat_task->vss_status;
727
728 if (audiod_status != AUDIOD_ON)
729 return false;
730 if (cafn < 0)
731 return false;
732 if (!stat_task->ct)
733 return false;
734 if (vs & VSS_STATUS_FLAG_NEXT)
735 return false;
736 if (!(vs & VSS_STATUS_FLAG_PLAYING))
737 return false;
738 if (receiver_running())
739 return false;
740 if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
741 return false;
742 return true;
743 }
744
745 static void compute_time_diff(const struct timeval *status_time)
746 {
747 struct timeval tmp, diff;
748 static unsigned count;
749 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
750 const struct timeval max_deviation = {0, 500 * 1000};
751 const int time_smooth = 5;
752
753 sign = tv_diff(status_time, now, &diff);
754 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
755 // sign, sa_time_diff_sign);
756 if (!count) {
757 sa_time_diff_sign = sign;
758 stat_task->sa_time_diff = diff;
759 count++;
760 goto out;
761 }
762 if (count > 5) {
763 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
764 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
765 PARA_WARNING_LOG("time diff jump: %lims\n",
766 s * tv2ms(&tmp));
767 }
768 count++;
769 sa_time_diff_sign = tv_convex_combination(
770 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
771 count > 10? sign : sign * time_smooth, &diff,
772 &tmp);
773 stat_task->sa_time_diff = tmp;
774 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
775 sign < 0? "-" : "+",
776 tv2ms(&diff),
777 sa_time_diff_sign < 0? "-" : "+",
778 tv2ms(&stat_task->sa_time_diff)
779 );
780 out:
781 stat_task->sa_time_diff_sign = sa_time_diff_sign;
782 }
783
784 static int update_item(int itemnum, char *buf)
785 {
786 long unsigned sec, usec;
787
788 if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
789 return 1;
790 free(stat_item_values[itemnum]);
791 stat_item_values[itemnum] = para_strdup(buf);
792 stat_client_write_item(itemnum);
793 switch (itemnum) {
794 case SI_STATUS_FLAGS:
795 stat_task->vss_status = 0;
796 if (strchr(buf, 'N'))
797 stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
798 if (strchr(buf, 'P'))
799 stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
800 break;
801 case SI_OFFSET:
802 stat_task->offset_seconds = atoi(buf);
803 break;
804 case SI_SECONDS_TOTAL:
805 stat_task->length_seconds = atoi(buf);
806 break;
807 case SI_STREAM_START:
808 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
809 stat_task->server_stream_start.tv_sec = sec;
810 stat_task->server_stream_start.tv_usec = usec;
811 }
812 break;
813 case SI_CURRENT_TIME:
814 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
815 struct timeval tv = {sec, usec};
816 compute_time_diff(&tv);
817 }
818 break;
819 case SI_FORMAT:
820 stat_task->current_audio_format_num
821 = get_audio_format_num(buf);
822 }
823 return 1;
824 }
825
826 static int parse_stream_command(const char *txt, char **cmd)
827 {
828 int ret, len;
829 char *re, *p = strchr(txt, ':');
830
831 if (!p)
832 return -E_MISSING_COLON;
833 *cmd = p + 1;
834 len = p - txt;
835 re = malloc(len + 1);
836 strncpy(re, txt, len);
837 re[len] = '\0';
838 ret = get_matching_audio_format_nums(re);
839 free(re);
840 return ret;
841 }
842
843 static int add_filter(int format, char *cmdline)
844 {
845 struct audio_format_info *a = &afi[format];
846 int filter_num, nf = a->num_filters;
847 void *cfg;
848
849 filter_num = check_filter_arg(cmdline, &cfg);
850 if (filter_num < 0)
851 return filter_num;
852 a->filter_conf = para_realloc(a->filter_conf,
853 (nf + 1) * sizeof(void *));
854 a->filter_nums = para_realloc(a->filter_nums,
855 (nf + 1) * sizeof(unsigned));
856 a->filter_nums[nf] = filter_num;
857 a->filter_conf[nf] = cfg;
858 a->num_filters++;
859 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
860 filter_get(filter_num)->name);
861 return filter_num;
862 }
863
864 static int parse_writer_args(void)
865 {
866 int i, ret;
867 char *cmd;
868 struct audio_format_info *a;
869
870 for (i = 0; i < conf.writer_given; i++) {
871 void *wconf;
872 int j, nw, writer_num, af_mask;
873
874 ret = parse_stream_command(conf.writer_arg[i], &cmd);
875 if (ret < 0)
876 return ret;
877 af_mask = ret;
878 FOR_EACH_AUDIO_FORMAT(j) {
879 a = afi + j;
880 if ((af_mask & (1 << j)) == 0) /* no match */
881 continue;
882 wconf = check_writer_arg_or_die(cmd, &writer_num);
883 nw = a->num_writers;
884 a->writer_nums = para_realloc(a->writer_nums, (nw + 1) * sizeof(int));
885 a->writer_conf = para_realloc(a->writer_conf, (nw + 1) * sizeof(void *));
886 a->writer_nums[nw] = writer_num;
887 a->writer_conf[nw] = wconf;
888 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[j],
889 nw, writer_names[writer_num]);
890 a->num_writers++;
891 }
892 }
893 /* Use default writer for audio formats which are not yet set up. */
894 FOR_EACH_AUDIO_FORMAT(i) {
895 void *writer_conf;
896 int writer_num;
897 a = afi + i;
898 if (a->num_writers > 0)
899 continue; /* already set up */
900 writer_conf = check_writer_arg_or_die(NULL, &writer_num);
901 a->writer_nums = para_malloc(sizeof(int));
902 a->writer_nums[0] = writer_num;
903 a->writer_conf = para_malloc(sizeof(void *));
904 a->writer_conf[0] = writer_conf;
905 a->num_writers = 1;
906 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats[i],
907 writer_names[writer_num]);
908 }
909 return 1;
910 }
911
912 static int parse_receiver_args(void)
913 {
914 int i, ret, receiver_num;
915 char *cmd = NULL;
916 struct audio_format_info *a;
917
918 for (i = conf.receiver_given - 1; i >= 0; i--) {
919 char *arg;
920 int j, af_mask;
921
922 ret = parse_stream_command(conf.receiver_arg[i], &arg);
923 if (ret < 0)
924 goto out;
925 af_mask = ret;
926 FOR_EACH_AUDIO_FORMAT(j) {
927 a = afi + j;
928 if ((af_mask & (1 << j)) == 0) /* no match */
929 continue;
930 /*
931 * If multiple receivers are given for this audio format, the
932 * last one wins and we have to free the previous receiver
933 * config here. Since we are iterating backwards, the winning
934 * receiver arg is in fact the first one given.
935 */
936 if (a->receiver_conf)
937 a->receiver->free_config(a->receiver_conf);
938 a->receiver_conf = check_receiver_arg(arg, &receiver_num);
939 ret = -E_RECV_SYNTAX;
940 if (!a->receiver_conf)
941 goto out;
942 a->receiver = receivers + receiver_num;
943 }
944 }
945 /*
946 * Use the first available receiver with no arguments for those audio
947 * formats for which no receiver was specified.
948 */
949 cmd = para_strdup(receivers[0].name);
950 FOR_EACH_AUDIO_FORMAT(i) {
951 a = &afi[i];
952 if (a->receiver_conf)
953 continue;
954 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
955 if (!a->receiver_conf)
956 return -E_RECV_SYNTAX;
957 a->receiver = &receivers[receiver_num];
958 }
959 FOR_EACH_AUDIO_FORMAT(i) {
960 a = afi + i;
961 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
962 audio_formats[i], a->receiver->name);
963 }
964 ret = 1;
965 out:
966 free(cmd);
967 return ret;
968 }
969
970 static int init_default_filters(void)
971 {
972 int i, ret = 1;
973
974 FOR_EACH_AUDIO_FORMAT(i) {
975 struct audio_format_info *a = &afi[i];
976 char *tmp;
977 int j;
978
979 if (a->num_filters)
980 continue; /* no default -- nothing to to */
981 /*
982 * udp and dccp streams are fec-encoded, so add fecdec as the
983 * first filter.
984 */
985 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
986 strcmp(afi[i].receiver->name, "dccp") == 0) {
987 tmp = para_strdup("fecdec");
988 add_filter(i, tmp);
989 free(tmp);
990 if (ret < 0)
991 goto out;
992 }
993 /* add "dec" to audio format name */
994 tmp = make_message("%sdec", audio_formats[i]);
995 for (j = 0; filter_get(j); j++)
996 if (!strcmp(tmp, filter_get(j)->name))
997 break;
998 free(tmp);
999 ret = -E_UNSUPPORTED_FILTER;
1000 if (!filter_get(j))
1001 goto out;
1002 tmp = para_strdup(filter_get(j)->name);
1003 ret = add_filter(i, tmp);
1004 free(tmp);
1005 if (ret < 0)
1006 goto out;
1007 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1008 filter_get(j)->name);
1009 }
1010 out:
1011 return ret;
1012 }
1013
1014 static int parse_filter_args(void)
1015 {
1016 int i, j, ret, af_mask, num_matches;
1017
1018 for (i = 0; i < conf.filter_given; i++) {
1019 char *arg;
1020 ret = parse_stream_command(conf.filter_arg[i], &arg);
1021 if (ret < 0)
1022 goto out;
1023 af_mask = ret;
1024 num_matches = 0;
1025 FOR_EACH_AUDIO_FORMAT(j) {
1026 if ((af_mask & (1 << j)) == 0) /* no match */
1027 continue;
1028 ret = add_filter(j, arg);
1029 if (ret < 0)
1030 goto out;
1031 num_matches++;
1032 }
1033 if (num_matches == 0)
1034 PARA_WARNING_LOG("ignoring filter spec: %s\n",
1035 conf.filter_arg[i]);
1036 }
1037 ret = init_default_filters(); /* use default values for the rest */
1038 out:
1039 return ret;
1040 }
1041
1042 static int parse_stream_args(void)
1043 {
1044 int ret;
1045
1046 ret = parse_receiver_args();
1047 if (ret < 0)
1048 return ret;
1049 ret = parse_filter_args();
1050 if (ret < 0)
1051 return ret;
1052 ret = parse_writer_args();
1053 if (ret < 0)
1054 return ret;
1055 return 1;
1056 }
1057
1058 /* does not unlink socket on errors */
1059 static void init_local_sockets(struct command_task *ct)
1060 {
1061 if (conf.socket_given)
1062 socket_name = para_strdup(conf.socket_arg);
1063 else {
1064 char *hn = para_hostname();
1065 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1066 hn);
1067 free(hn);
1068 }
1069 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
1070 if (conf.force_given)
1071 unlink(socket_name);
1072 ct->fd[0] = create_local_socket(socket_name, 0);
1073 ct->fd[1] = create_local_socket(socket_name,
1074 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1075 if (ct->fd[0] >= 0 || ct->fd[1] >= 0)
1076 return;
1077 PARA_EMERG_LOG("%s\n", para_strerror(-ct->fd[1]));
1078 exit(EXIT_FAILURE);
1079 }
1080
1081 static int signal_post_select(struct sched *s, void *context)
1082 {
1083 struct signal_task *st = context;
1084 int ret, signum;
1085
1086 ret = task_get_notification(st->task);
1087 if (ret < 0)
1088 return ret;
1089 signum = para_next_signal(&s->rfds);
1090 switch (signum) {
1091 case SIGINT:
1092 case SIGTERM:
1093 case SIGHUP:
1094 PARA_NOTICE_LOG("received signal %d\n", signum);
1095 task_notify_all(s, E_AUDIOD_SIGNAL);
1096 return -E_AUDIOD_SIGNAL;
1097 }
1098 return 0;
1099 }
1100
1101 static void command_pre_select(struct sched *s, void *context)
1102 {
1103 struct command_task *ct = context;
1104 int i;
1105
1106 for (i = 0; i < 2; i++)
1107 if (ct->fd[i] >= 0)
1108 para_fd_set(ct->fd[i], &s->rfds, &s->max_fileno);
1109 }
1110
1111 static int command_post_select(struct sched *s, void *context)
1112 {
1113 int ret, i;
1114 struct command_task *ct = context;
1115 static struct timeval last_status_dump;
1116 struct timeval tmp, delay;
1117 bool force = false;
1118
1119 ret = task_get_notification(ct->task);
1120 if (ret < 0)
1121 return ret;
1122 for (i = 0; i < 2; i++) {
1123 if (ct->fd[i] < 0)
1124 continue;
1125 ret = handle_connect(ct->fd[i], &s->rfds, uid_whitelist);
1126 if (ret < 0) {
1127 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1128 if (ret == -E_AUDIOD_TERM) {
1129 task_notify_all(s, -ret);
1130 return ret;
1131 }
1132 } else if (ret > 0)
1133 force = true;
1134 }
1135 if (force == true)
1136 goto dump;
1137
1138 /* if last status dump was less than 500ms ago, do nothing */
1139 delay.tv_sec = 0;
1140 delay.tv_usec = 500 * 1000;
1141 tv_add(&last_status_dump, &delay, &tmp);
1142 if (tv_diff(now, &tmp, NULL) < 0)
1143 return 0;
1144
1145 /*
1146 * If last status dump was more than 5s ago, force update. Otherwise,
1147 * update only those items that have changed.
1148 */
1149 delay.tv_sec = 5;
1150 delay.tv_usec = 0;
1151 tv_add(&last_status_dump, &delay, &tmp);
1152 if (tv_diff(now, &tmp, NULL) > 0)
1153 force = true;
1154 dump:
1155 audiod_status_dump(force);
1156 last_status_dump = *now;
1157 return 1;
1158 }
1159
1160 static void init_command_task(struct command_task *ct)
1161 {
1162 init_local_sockets(ct); /* doesn't return on errors */
1163
1164 ct->task = task_register(&(struct task_info) {
1165 .name = "command",
1166 .pre_select = command_pre_select,
1167 .post_select = command_post_select,
1168 .context = ct,
1169 }, &sched);
1170 }
1171
1172 static void close_stat_pipe(void)
1173 {
1174 if (!stat_task->ct)
1175 return;
1176 task_reap(&stat_task->ct->task);
1177 client_close(stat_task->ct);
1178 stat_task->ct = NULL;
1179 clear_and_dump_items();
1180 stat_task->length_seconds = 0;
1181 stat_task->offset_seconds = 0;
1182 stat_task->vss_status = 0;
1183 stat_task->current_audio_format_num = -1;
1184 audiod_status_dump(true);
1185 }
1186
1187 /* avoid busy loop if server is down */
1188 static void set_stat_task_restart_barrier(unsigned seconds)
1189 {
1190 struct timeval delay = {seconds, 0};
1191 tv_add(now, &delay, &stat_task->restart_barrier);
1192 }
1193
1194 static bool must_close_slot(int slot_num)
1195 {
1196 struct slot_info *s = &slot[slot_num];
1197 struct audio_format_info *a = afi + s->format;
1198 int i;
1199
1200 if (s->format < 0)
1201 return false;
1202 if (s->receiver_node && task_status(s->receiver_node->task) >= 0)
1203 return false;
1204 for (i = 0; i < a->num_filters; i++)
1205 if (s->fns && task_status(s->fns[i].task) >= 0)
1206 return false;
1207 if (a->num_writers > 0) {
1208 for (i = 0; i < a->num_writers; i++)
1209 if (s->wns && task_status(s->wns[i].task) >= 0)
1210 return false;
1211 } else {
1212 if (s->wns && task_status(s->wns[0].task) >= 0)
1213 return false;
1214 }
1215 return true;
1216 }
1217
1218 static void close_slot(int slot_num)
1219 {
1220 struct slot_info *s = slot + slot_num;
1221
1222 PARA_INFO_LOG("closing slot %d\n", slot_num);
1223 close_writers(s);
1224 close_filters(s);
1225 close_receiver(slot_num);
1226 clear_slot(slot_num);
1227 }
1228
1229 static void close_unused_slots(void)
1230 {
1231 int i;
1232 bool dump = false;
1233
1234 FOR_EACH_SLOT(i)
1235 if (must_close_slot(i)) {
1236 close_slot(i);
1237 dump = true;
1238 }
1239 if (dump)
1240 audiod_status_dump(true);
1241 }
1242
1243 /*
1244 * Cleanup all resources.
1245 *
1246 * This performs various cleanups, removes the audiod socket and closes the
1247 * connection to para_server.
1248 */
1249 static void audiod_cleanup(void)
1250 {
1251 if (socket_name)
1252 unlink(socket_name);
1253 close_stat_pipe();
1254 close_unused_slots();
1255 audiod_cmdline_parser_free(&conf);
1256 close_stat_clients();
1257 free(uid_whitelist);
1258 }
1259
1260 /*
1261 * Check if any receivers/filters/writers need to be started and do so if
1262 * necessary.
1263 */
1264 static void start_stop_decoders(void)
1265 {
1266 int ret;
1267 struct slot_info *sl;
1268
1269 close_unused_slots();
1270 if (audiod_status != AUDIOD_ON ||
1271 !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1272 return notify_receivers(E_NOT_PLAYING);
1273 if (!must_start_decoder())
1274 return;
1275 ret = open_receiver(stat_task->current_audio_format_num);
1276 if (ret < 0) {
1277 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1278 return;
1279 }
1280 sl = slot + ret;
1281 open_filters(sl);
1282 open_writers(sl);
1283 activate_grab_clients(&sched);
1284 btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1285 audiod_status_dump(true);
1286 }
1287
1288 static void status_pre_select(struct sched *s, void *context)
1289 {
1290 struct status_task *st = context;
1291 int i, ret, cafn = stat_task->current_audio_format_num;
1292
1293 if (must_start_decoder())
1294 goto min_delay;
1295 FOR_EACH_SLOT(i)
1296 if (must_close_slot(i))
1297 goto min_delay;
1298 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1299 if (ret > 0)
1300 goto min_delay;
1301 if (st->ct && audiod_status == AUDIOD_OFF)
1302 goto min_delay;
1303 if (!st->ct && audiod_status != AUDIOD_OFF)
1304 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1305 if (cafn >= 0)
1306 sched_request_barrier(&afi[cafn].restart_barrier, s);
1307 /*
1308 * If para_server is playing we'd like to have a smooth time display
1309 * even if we are running in standby mode. So we request a timeout that
1310 * expires at the next full second.
1311 */
1312 if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1313 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1314 return;
1315 min_delay:
1316 sched_min_delay(s);
1317 }
1318
1319 /* restart the client task if necessary */
1320 static int status_post_select(struct sched *s, void *context)
1321 {
1322 struct status_task *st = context;
1323 int ret;
1324
1325 ret = task_get_notification(st->task);
1326 if (ret < 0)
1327 return ret;
1328 if (audiod_status == AUDIOD_OFF) {
1329 if (!st->ct)
1330 goto out;
1331 if (task_status(st->ct->task) >= 0) {
1332 task_notify(st->ct->task, E_AUDIOD_OFF);
1333 goto out;
1334 }
1335 close_stat_pipe();
1336 st->clock_diff_count = conf.clock_diff_count_arg;
1337 goto out;
1338 }
1339 if (st->ct) {
1340 char *buf;
1341 size_t sz;
1342
1343 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1344 if (ret < 0) {
1345 close_stat_pipe();
1346 goto out;
1347 }
1348 if (st->ct->status != CL_EXECUTING)
1349 goto out;
1350 if (ret == 0) {
1351 struct timeval diff;
1352 tv_diff(now, &st->last_status_read, &diff);
1353 if (diff.tv_sec > 61)
1354 task_notify(st->ct->task, E_STATUS_TIMEOUT);
1355 goto out;
1356 }
1357 btr_merge(st->btrn, st->min_iqs);
1358 sz = btr_next_buffer(st->btrn, &buf);
1359 ret = for_each_stat_item(buf, sz, update_item);
1360 if (ret < 0) {
1361 task_notify(st->ct->task, -ret);
1362 goto out;
1363 }
1364 if (sz != ret) {
1365 btr_consume(st->btrn, sz - ret);
1366 st->last_status_read = *now;
1367 st->min_iqs = 0;
1368 } else /* current status item crosses buffers */
1369 st->min_iqs = sz + 1;
1370 goto out;
1371 }
1372 btr_drain(st->btrn);
1373 st->current_audio_format_num = -1;
1374 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1375 goto out;
1376 if (st->clock_diff_count) { /* get status only one time */
1377 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1378 int argc = 5;
1379 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1380 st->clock_diff_count--;
1381 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1382 set_stat_task_restart_barrier(2);
1383
1384 } else {
1385 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1386 int argc = 4;
1387 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1388 set_stat_task_restart_barrier(5);
1389 }
1390 free(stat_item_values[SI_BASENAME]);
1391 stat_item_values[SI_BASENAME] = para_strdup(
1392 "no connection to para_server");
1393 stat_client_write_item(SI_BASENAME);
1394 st->last_status_read = *now;
1395 out:
1396 start_stop_decoders();
1397 return 0;
1398 }
1399
1400 static void init_status_task(struct status_task *st)
1401 {
1402 memset(st, 0, sizeof(struct status_task));
1403 st->sa_time_diff_sign = 1;
1404 st->clock_diff_count = conf.clock_diff_count_arg;
1405 st->current_audio_format_num = -1;
1406 st->btrn = btr_new_node(&(struct btr_node_description)
1407 EMBRACE(.name = "stat"));
1408
1409 stat_task->task = task_register(&(struct task_info) {
1410 .name = "stat",
1411 .pre_select = status_pre_select,
1412 .post_select = status_post_select,
1413 .context = stat_task,
1414 }, &sched);
1415 }
1416
1417 static void set_initial_status(void)
1418 {
1419 audiod_status = AUDIOD_ON;
1420 if (!conf.mode_given)
1421 return;
1422 if (!strcmp(conf.mode_arg, "sb")) {
1423 audiod_status = AUDIOD_STANDBY;
1424 return;
1425 }
1426 if (!strcmp(conf.mode_arg, "off")) {
1427 audiod_status = AUDIOD_OFF;
1428 return;
1429 }
1430 if (strcmp(conf.mode_arg, "on"))
1431 PARA_WARNING_LOG("invalid mode\n");
1432 }
1433
1434 __noreturn static void print_help_and_die(void)
1435 {
1436 struct ggo_help h = DEFINE_GGO_HELP(audiod);
1437 bool d = conf.detailed_help_given;
1438 unsigned flags;
1439
1440 flags = d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS;
1441 ggo_print_help(&h, flags);
1442
1443 flags = d? GPH_MODULE_FLAGS_DETAILED : GPH_MODULE_FLAGS;
1444 print_receiver_helps(flags);
1445 print_filter_helps(flags);
1446 print_writer_helps(flags);
1447 exit(0);
1448 }
1449
1450 /**
1451 * the main function of para_audiod
1452 *
1453 * \param argc usual argument count
1454 * \param argv usual argument vector
1455 *
1456 * \return EXIT_SUCCESS or EXIT_FAILURE
1457 *
1458 * \sa para_audiod(1)
1459 * */
1460 int main(int argc, char *argv[])
1461 {
1462 int ret, i;
1463 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1464 struct audiod_cmdline_parser_params params = {
1465 .override = 0,
1466 .initialize = 1,
1467 .check_required = 0,
1468 .check_ambiguity = 0,
1469 .print_errors = 1
1470 };
1471
1472 valid_fd_012();
1473 audiod_cmdline_parser_ext(argc, argv, &conf, &params);
1474 daemon_set_loglevel(conf.loglevel_arg);
1475 version_handle_flag("audiod", conf.version_given);
1476 /* init receivers/filters/writers early to make help work */
1477 recv_init();
1478 filter_init();
1479 writer_init();
1480 if (conf.help_given || conf.detailed_help_given)
1481 print_help_and_die();
1482 daemon_set_priority(conf.priority_arg);
1483 daemon_drop_privileges_or_die(conf.user_arg, conf.group_arg);
1484 parse_config_or_die();
1485 daemon_init_colors_or_die(conf.color_arg, color_arg_auto, color_arg_no,
1486 conf.logfile_given, conf.log_color_arg, conf.log_color_given);
1487 init_random_seed_or_die();
1488 daemon_set_flag(DF_LOG_TIME);
1489 daemon_set_flag(DF_LOG_HOSTNAME);
1490 daemon_set_flag(DF_LOG_LL);
1491 if (conf.log_timing_given)
1492 daemon_set_flag(DF_LOG_TIMING);
1493 if (conf.logfile_given) {
1494 daemon_set_logfile(conf.logfile_arg);
1495 daemon_open_log_or_die();
1496 }
1497 ret = parse_stream_args();
1498 if (ret < 0) {
1499 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1500 exit(EXIT_FAILURE);
1501 }
1502 daemon_log_welcome("audiod");
1503 daemon_set_start_time();
1504 set_initial_status();
1505 FOR_EACH_SLOT(i)
1506 clear_slot(i);
1507 setup_signal_handling();
1508
1509 init_status_task(stat_task);
1510 init_command_task(cmd_task);
1511
1512 if (conf.daemon_given)
1513 daemonize(false /* parent exits immediately */);
1514
1515 signal_task->task = task_register(&(struct task_info) {
1516 .name = "signal",
1517 .pre_select = signal_pre_select,
1518 .post_select = signal_post_select,
1519 .context = signal_task,
1520 }, &sched);
1521
1522 sched.default_timeout.tv_sec = 2;
1523 sched.default_timeout.tv_usec = 999 * 1000;
1524 ret = schedule(&sched);
1525 audiod_cleanup();
1526 sched_shutdown(&sched);
1527 signal_shutdown(signal_task);
1528
1529 if (ret < 0)
1530 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1531 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
1532 }