compress: Overhaul the meaning of --aggressiveness.
[paraslash.git] / audiod.c
1 /* Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
2
3 /** \file audiod.c The paraslash's audio daemon. */
4
5 #include <netinet/in.h>
6 #include <sys/socket.h>
7 #include <regex.h>
8 #include <sys/types.h>
9 #include <arpa/inet.h>
10 #include <sys/un.h>
11 #include <netdb.h>
12 #include <signal.h>
13 #include <pwd.h>
14 #include <lopsub.h>
15
16 #include "audiod.lsg.h"
17 #include "recv_cmd.lsg.h"
18 #include "para.h"
19 #include "error.h"
20 #include "lsu.h"
21 #include "crypt.h"
22 #include "list.h"
23 #include "sched.h"
24 #include "buffer_tree.h"
25 #include "recv.h"
26 #include "filter.h"
27 #include "grab_client.h"
28 #include "client.h"
29 #include "audiod.h"
30 #include "net.h"
31 #include "daemon.h"
32 #include "string.h"
33 #include "fd.h"
34 #include "write.h"
35 #include "signal.h"
36 #include "version.h"
37
38 /** Array of error strings. */
39 DEFINE_PARA_ERRLIST;
40
41 static struct lls_parse_result *lpr;
42 #define CMD_PTR (lls_cmd(0, audiod_suite))
43 #define OPT_RESULT(_name) (lls_opt_result(LSG_AUDIOD_PARA_AUDIOD_OPT_ ## _name, lpr))
44 #define OPT_GIVEN(_name) (lls_opt_given(OPT_RESULT(_name)))
45 #define OPT_STRING_VAL(_name) (lls_string_val(0, OPT_RESULT(_name)))
46 #define OPT_UINT32_VAL(_name) (lls_uint32_val(0, OPT_RESULT(_name)))
47 #define ENUM_STRING_VAL(_name) (lls_enum_string_val(OPT_UINT32_VAL(_name), \
48 lls_opt(LSG_AUDIOD_PARA_AUDIOD_OPT_ ## _name, CMD_PTR)))
49
50 __printf_2_3 void (*para_log)(int, const char*, ...) = daemon_log;
51 /** define the array containing all supported audio formats */
52 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
53
54 /** Defines how audiod handles one supported audio format. */
55 struct audio_format_info {
56 /** the receiver for this audio format */
57 int receiver_num;
58 /** Parsed receiver command line. */
59 struct lls_parse_result *receiver_lpr;
60 /** the number of filters that should be activated for this audio format */
61 unsigned int num_filters;
62 /** Array of filter numbers to be activated. */
63 unsigned *filter_nums;
64 /** Pointer to the array of filter configurations. */
65 void **filter_conf;
66 /** Parsed filter command line, one parse result per filter. */
67 struct lls_parse_result **filter_lpr;
68 /** the number of filters that should be activated for this audio format */
69 unsigned int num_writers;
70 /** Array of writer IDs to be activated. */
71 int *wids;
72 /** Parsed writer command line(s) */
73 struct lls_parse_result **writer_lpr;
74 /** do not start receiver/filters/writer before this time */
75 struct timeval restart_barrier;
76 };
77
78 /* Describes one instance of a receiver-filter-writer chain. */
79 struct slot_info {
80 /* Number of the audio format in this slot. */
81 int format;
82 /* The stream_start status item announced by para_server. */
83 struct timeval server_stream_start;
84 /* The offset status item announced by para_server. */
85 unsigned offset_seconds;
86 /* The seconds_total status item announced by para_server. */
87 unsigned seconds_total;
88 /* The receiver info associated with this slot. */
89 struct receiver_node *receiver_node;
90 /* The array of filter nodes. */
91 struct filter_node *fns;
92 /* The array of writers attached to the last filter. */
93 struct writer_node *wns;
94 };
95
96 #define RECEIVER_CMD(_a) lls_cmd((_a)->receiver_num, recv_cmd_suite)
97 #define RECEIVER(_a) ((const struct receiver *)lls_user_data(RECEIVER_CMD(_a)))
98
99 /** Maximal number of simultaneous instances. */
100 #define MAX_STREAM_SLOTS 5
101
102 /** Iterate over all slots. */
103 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
104
105 /**
106 * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
107 * be associated with a receiver/filter/writer triple. This array holds all
108 * information on the status of these slots.
109 */
110 struct slot_info slot[MAX_STREAM_SLOTS];
111
112 /** The vss status flags audiod is interested in. */
113 enum vss_status_flags {
114 /** Whether the 'N' flag is set. */
115 VSS_STATUS_FLAG_NEXT = 1,
116 /** The 'P' flag is set. */
117 VSS_STATUS_FLAG_PLAYING = 2,
118 };
119
120 /**
121 * The scheduler instance of para_audiod.
122 *
123 * This is needed also in audiod_command.c (for the tasks command), so it can
124 * not be made static.
125 */
126 struct sched sched = {.max_fileno = 0};
127
128 /* The task for obtaining para_server's status (para_client stat). */
129 struct status_task {
130 /** The associated task structure of audiod. */
131 struct task *task;
132 /** Client data associated with the stat task. */
133 struct client_task *ct;
134 /** Do not restart client command until this time. */
135 struct timeval restart_barrier;
136 /** Last time we received status data from para_server. */
137 struct timeval last_status_read;
138 size_t min_iqs;
139 /** The offset value announced by para_server. */
140 int offset_seconds;
141 /** The length of the current audio file as announced by para_server. */
142 int length_seconds;
143 /** The start of the current stream from the view of para_server. */
144 struct timeval server_stream_start;
145 /** The average time deviation between para_server and para_audiod. */
146 struct timeval sa_time_diff;
147 /** Whether client time is ahead of server time. */
148 int sa_time_diff_sign;
149 /** The 'P' and the 'N' flags as announced by para_server. */
150 enum vss_status_flags vss_status;
151 /** Number of times the clock difference is to be checked. */
152 unsigned clock_diff_count;
153 /** When to start the next check for clock difference. */
154 struct timeval clock_diff_barrier;
155 /** Number of the audio format as announced by para_server. */
156 int current_audio_format_num;
157 /* The status task btrn is the child of the client task. */
158 struct btr_node *btrn;
159 };
160
161 /** The array of status items sent by para_server. */
162 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
163
164 /**
165 * The current mode of operation (AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY).
166 * Set by the on/off/cycle commands.
167 */
168 int audiod_status = AUDIOD_ON;
169
170 static char *socket_name;
171 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
172 static struct signal_task *signal_task;
173 static struct status_task status_task_struct;
174 static uid_t *uid_whitelist;
175
176 /**
177 * The task that calls the status command of para_server.
178 *
179 * \sa \ref struct status_task.
180 */
181 static struct status_task *stat_task = &status_task_struct;
182
183 struct command_task {
184 /** The local listening socket. */
185 int fd;
186 /** The associated task structure. */
187 struct task *task;
188 };
189
190 /** Iterate over all supported audio formats. */
191 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
192
193 /**
194 * Get the audio format number.
195 *
196 * \param name The name of the audio format.
197 *
198 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
199 * \a name is not a supported audio format.
200 */
201 static int get_audio_format_num(const char *name)
202 {
203 int i;
204
205 while (para_isspace(*name))
206 name++;
207 FOR_EACH_AUDIO_FORMAT(i)
208 if (!strcmp(name, audio_formats[i]))
209 return i;
210 return -E_UNSUPPORTED_AUDIO_FORMAT;
211 }
212
213 /**
214 * Return the flags for the \a decoder_flags status item.
215 *
216 * Allocates a string which contains one octal digit per slot. Bit zero (value
217 * 1) is set if a receiver is active. Bit one (value 2) and bit three (value 4)
218 * have the analogous meaning for filter and writer, respectively.
219 *
220 * \return String that must be freed by the caller.
221 */
222 __malloc char *audiod_get_decoder_flags(void)
223 {
224 int i;
225 char flags[MAX_STREAM_SLOTS + 1];
226
227 FOR_EACH_SLOT(i) {
228 struct slot_info *s = &slot[i];
229 char flag = '0';
230 if (s->receiver_node)
231 flag += 1;
232 if (s->fns)
233 flag += 2;
234 if (s->wns)
235 flag += 4;
236 flags[i] = flag;
237 }
238 flags[MAX_STREAM_SLOTS] = '\0';
239 return para_strdup(flags);
240 }
241
242 static int get_matching_audio_format_nums(const char *re)
243 {
244 int i, ret;
245 regex_t preg;
246
247 ret = para_regcomp(&preg, re, REG_EXTENDED | REG_NOSUB);
248 if (ret < 0)
249 return ret;
250 ret = 0;
251 FOR_EACH_AUDIO_FORMAT(i)
252 if (regexec(&preg, audio_formats[i], 0, NULL, 0) != REG_NOMATCH)
253 ret |= (1 << i);
254 regfree(&preg);
255 return ret;
256 }
257
258 static int get_play_time_slot_num(void)
259 {
260 int i, oldest_slot = -1;
261 struct timeval oldest_wstime = {0, 0};
262
263 FOR_EACH_SLOT(i) {
264 struct slot_info *s = &slot[i];
265 struct timeval wstime;
266 if (!s->wns || !s->wns[0].btrn)
267 continue;
268 btr_get_node_start(s->wns[0].btrn, &wstime);
269 if (oldest_slot >= 0 && tv_diff(&wstime, &oldest_wstime, NULL) > 0)
270 continue;
271 oldest_wstime = wstime;
272 oldest_slot = i;
273 }
274 return oldest_slot;
275 }
276
277 /**
278 * Compute the play time based on information of the current slot.
279 *
280 * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
281 * from the status items received from para_server and the start time of the
282 * (first) writer of the current slot.
283 *
284 * It has to take into account that the stream was probably not started at
285 * the beginning of the file, that the clock between the server and the client
286 * host may differ and that playback of the stream was delayed, e.g. because
287 * the prebuffer filter is used in the filter configuration.
288 *
289 * If no writer is active, for example because para_audiod runs in standby
290 * mode, an approximation based only on the status items is computed and the
291 * returned string is prefixed with "~".
292 *
293 * \return A string that must be freed by the caller.
294 */
295 char *get_time_string(void)
296 {
297 int ret, seconds = 0, length = stat_task->length_seconds;
298 struct timeval *tmp, sum, sss, /* server stream start */
299 rstime, /* receiver start time */
300 wstime, /* writer start time */
301 wtime, /* now - writer start */
302 rskip; /* receiver start - sss */
303 int slot_num = get_play_time_slot_num();
304 struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
305 bool writer_active = s && s->wns && s->wns[0].btrn;
306 char *msg;
307
308 if (audiod_status == AUDIOD_OFF)
309 goto empty;
310 if (stat_task->server_stream_start.tv_sec == 0) {
311 if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
312 goto out; /* server is about to change file */
313 if (length > 0) /* paused */
314 return NULL;
315 goto empty; /* stopped */
316 }
317 /*
318 * Valid status items and playing, set length and tmp to the stream
319 * start. We use the writer start time from the slot info and fall back
320 * to the info from current status items if no writer is active yet.
321 */
322 tmp = &stat_task->server_stream_start;
323 if (writer_active) {
324 btr_get_node_start(s->wns[0].btrn, &wstime);
325 if (wstime.tv_sec != 0) { /* writer wrote something */
326 if (s->server_stream_start.tv_sec == 0) {
327 /* copy status info to slot */
328 s->server_stream_start = stat_task->server_stream_start;
329 s->offset_seconds = stat_task->offset_seconds;
330 s->seconds_total = stat_task->length_seconds;
331 }
332 length = s->seconds_total;
333 tmp = &s->server_stream_start;
334 }
335 }
336 if (stat_task->sa_time_diff_sign > 0)
337 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
338 else
339 tv_add(tmp, &stat_task->sa_time_diff, &sss);
340 if (!writer_active) {
341 struct timeval diff;
342 tv_diff(now, &sss, &diff);
343 seconds = diff.tv_sec + stat_task->offset_seconds;
344 goto out;
345 }
346 tv_diff(now, &wstime, &wtime);
347 //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
348 seconds = s->offset_seconds;
349 if (s->receiver_node->btrn) {
350 btr_get_node_start(s->receiver_node->btrn, &rstime);
351 ret = tv_diff(&rstime, &sss, &rskip);
352 if (ret > 0 && rskip.tv_sec > 2) {
353 /* audiod was started in the middle of the stream */
354 tv_add(&wtime, &rskip, &sum);
355 seconds += sum.tv_sec;
356 } else
357 seconds += wtime.tv_sec;
358 } else
359 seconds += wtime.tv_sec;
360 out:
361 seconds = PARA_MIN(seconds, length);
362 seconds = PARA_MAX(seconds, 0);
363 msg = make_message(
364 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
365 s? "" : "~",
366 seconds / 60,
367 seconds % 60,
368 (length - seconds) / 60,
369 (length - seconds) % 60,
370 length? (seconds * 100 + length / 2) / length : 0,
371 length / 60,
372 length % 60
373 );
374 //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
375 return msg;
376 empty:
377 return para_strdup(NULL);
378 }
379
380 static void parse_config_or_die(void)
381 {
382 int i, ret;
383 uint32_t n;
384
385 ret = lsu_merge_config_file_options(OPT_STRING_VAL(CONFIG_FILE),
386 "audiod.conf", &lpr, CMD_PTR, audiod_suite, 0U /* flags */);
387 if (ret < 0) {
388 PARA_EMERG_LOG("failed to parse config file: %s\n",
389 para_strerror(-ret));
390 exit(EXIT_FAILURE);
391 }
392 daemon_set_loglevel(ENUM_STRING_VAL(LOGLEVEL));
393 n = OPT_GIVEN(USER_ALLOW);
394 if (n == 0)
395 return;
396 uid_whitelist = para_malloc(n * sizeof(uid_t));
397 for (i = 0; i < n; i++) {
398 const char *arg = lls_string_val(i, OPT_RESULT(USER_ALLOW));
399 int32_t val;
400 struct passwd *pw;
401 ret = para_atoi32(arg, &val);
402 if (ret >= 0) {
403 uid_whitelist[i] = val;
404 continue;
405 }
406 pw = getpwnam(arg);
407 if (!pw) {
408 PARA_EMERG_LOG("invalid username: %s\n", arg);
409 exit(EXIT_FAILURE);
410 }
411 uid_whitelist[i] = pw->pw_uid;
412 }
413 }
414
415 static void setup_signal_handling(void)
416 {
417 signal_task = signal_init_or_die();
418 para_install_sighandler(SIGINT);
419 para_install_sighandler(SIGTERM);
420 para_install_sighandler(SIGHUP);
421 para_sigaction(SIGPIPE, SIG_IGN);
422 }
423
424 static void clear_slot(int slot_num)
425 {
426 struct slot_info *s = &slot[slot_num];
427
428 PARA_INFO_LOG("clearing slot %d\n", slot_num);
429 memset(s, 0, sizeof(struct slot_info));
430 s->format = -1;
431 }
432
433 static void close_receiver(int slot_num)
434 {
435 struct slot_info *s = &slot[slot_num];
436 struct audio_format_info *a;
437
438 if (s->format < 0 || !s->receiver_node)
439 return;
440 a = &afi[s->format];
441 PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
442 audio_formats[s->format], slot_num);
443 RECEIVER(a)->close(s->receiver_node);
444 btr_remove_node(&s->receiver_node->btrn);
445 task_reap(&s->receiver_node->task);
446 free(s->receiver_node);
447 s->receiver_node = NULL;
448 stat_task->current_audio_format_num = -1;
449 tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
450 &a->restart_barrier);
451 }
452
453 static void writer_cleanup(struct writer_node *wn)
454 {
455 if (!wn)
456 return;
457 PARA_INFO_LOG("closing %s\n", writer_name(wn->wid));
458 writer_get(wn->wid)->close(wn);
459 btr_remove_node(&wn->btrn);
460 task_reap(&wn->task);
461 }
462
463 static void close_writers(struct slot_info *s)
464 {
465 struct audio_format_info *a;
466 int i;
467
468 if (s->format < 0)
469 return;
470 assert(s->wns);
471 a = afi + s->format;
472 if (a->num_writers == 0)
473 writer_cleanup(s->wns);
474 else {
475 for (i = 0; i < a->num_writers; i++)
476 writer_cleanup(s->wns + i);
477 }
478 free(s->wns);
479 s->wns = NULL;
480 }
481
482 static void close_filters(struct slot_info *s)
483 {
484 int i;
485 struct audio_format_info *a = afi + s->format;
486 if (a->num_filters == 0)
487 return;
488 for (i = a->num_filters - 1; i >= 0; i--) {
489 struct filter_node *fn = s->fns + i;
490 const struct filter *f;
491
492 if (!fn)
493 continue;
494 f = filter_get(fn->filter_num);
495 if (f->close)
496 f->close(fn);
497 btr_remove_node(&fn->btrn);
498 task_reap(&fn->task);
499 }
500 free(s->fns);
501 s->fns = NULL;
502 }
503
504 static void notify_receivers(int error)
505 {
506 int i;
507
508 FOR_EACH_SLOT(i) {
509 struct slot_info *s = slot + i;
510 if (s->format < 0)
511 continue;
512 if (!s->receiver_node)
513 continue;
514 task_notify(s->receiver_node->task, error);
515 }
516 }
517
518 static int get_empty_slot(void)
519 {
520 int i;
521 struct slot_info *s;
522
523 FOR_EACH_SLOT(i) {
524 s = &slot[i];
525 if (s->format < 0) {
526 clear_slot(i);
527 return i;
528 }
529 if (s->wns || s->receiver_node || s->fns)
530 continue;
531 clear_slot(i);
532 return i;
533 }
534 return -E_NO_MORE_SLOTS;
535 }
536
537 static void open_filters(struct slot_info *s)
538 {
539 struct audio_format_info *a = afi + s->format;
540 struct filter_node *fn;
541 int nf = a->num_filters;
542 struct btr_node *parent;
543 int i;
544
545 if (nf == 0)
546 return;
547 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
548 assert(s->fns == NULL);
549 s->fns = para_calloc(nf * sizeof(struct filter_node));
550 parent = s->receiver_node->btrn;
551 for (i = 0; i < nf; i++) {
552 char buf[20];
553 const char *name;
554 const struct filter *f = filter_get(a->filter_nums[i]);
555 fn = s->fns + i;
556 fn->filter_num = a->filter_nums[i];
557 fn->conf = a->filter_conf[i];
558 fn->lpr = a->filter_lpr[i];
559 name = filter_name(fn->filter_num);
560 fn->btrn = btr_new_node(&(struct btr_node_description)
561 EMBRACE(.name = name, .parent = parent,
562 .handler = f->execute, .context = fn));
563
564 if (f->open)
565 f->open(fn);
566 sprintf(buf, "%s (slot %d)", name, (int)(s - slot));
567 fn->task = task_register(&(struct task_info) {
568 .name = buf,
569 .pre_select = f->pre_select,
570 .post_select = f->post_select,
571 .context = fn,
572 }, &sched);
573 parent = fn->btrn;
574 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
575 audio_formats[s->format], i, nf, name, (int)(s - slot));
576 }
577 }
578
579 static void open_writers(struct slot_info *s)
580 {
581 int i;
582 struct audio_format_info *a = afi + s->format;
583 struct writer_node *wn;
584 struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
585
586 assert(s->wns == NULL);
587 s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
588 * sizeof(struct writer_node));
589 for (i = 0; i < a->num_writers; i++) {
590 wn = s->wns + i;
591 wn->wid = a->wids[i];
592 wn->lpr = a->writer_lpr[i];
593 register_writer_node(wn, parent, &sched);
594 PARA_NOTICE_LOG("%s writer started in slot %d\n",
595 writer_name(a->wids[i]), (int)(s - slot));
596 }
597 }
598
599 /* returns slot num on success */
600 static int open_receiver(int format)
601 {
602 struct audio_format_info *a = &afi[format];
603 struct slot_info *s;
604 int ret, slot_num;
605 const struct receiver *r = RECEIVER(a);
606 const char *name = lls_command_name(RECEIVER_CMD(a));
607 struct receiver_node *rn;
608
609 tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
610 ret = get_empty_slot();
611 if (ret < 0)
612 return ret;
613 slot_num = ret;
614 rn = para_calloc(sizeof(*rn));
615 rn->receiver = r;
616 rn->lpr = a->receiver_lpr;
617 rn->btrn = btr_new_node(&(struct btr_node_description)
618 EMBRACE(.name = name, .context = rn));
619 ret = r->open(rn);
620 if (ret < 0) {
621 PARA_ERROR_LOG("could not open %s receiver\n", name);
622 btr_remove_node(&rn->btrn);
623 free(rn);
624 return ret;
625 }
626 s = &slot[slot_num];
627 s->format = format;
628 s->receiver_node = rn;
629 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
630 audio_formats[format], name, slot_num);
631 rn->task = task_register(&(struct task_info) {
632 .name = name,
633 .pre_select = r->pre_select,
634 .post_select = r->post_select,
635 .context = rn,
636 }, &sched);
637 return slot_num;
638 }
639
640 static bool receiver_running(void)
641 {
642 int i;
643 long unsigned ss1 = stat_task->server_stream_start.tv_sec;
644
645 FOR_EACH_SLOT(i) {
646 struct slot_info *s = &slot[i];
647 long unsigned ss2 = s->server_stream_start.tv_sec;
648
649 if (!s->receiver_node)
650 continue;
651 if (task_status(s->receiver_node->task) >= 0)
652 return true;
653 if (ss1 == ss2)
654 return true;
655 }
656 return false;
657 }
658
659 /**
660 * Return the root node of the current buffer tree.
661 *
662 * This is only used for stream grabbing.
663 *
664 * \return \p NULL if no slot is currently active. If more than one buffer tree
665 * exists, the node corresponding to the most recently started receiver is
666 * returned.
667 */
668 struct btr_node *audiod_get_btr_root(void)
669 {
670 int i, newest_slot = -1;
671 struct timeval newest_rstime = {0, 0};
672
673 FOR_EACH_SLOT(i) {
674 struct slot_info *s = &slot[i];
675 struct timeval rstime;
676 if (!s->receiver_node)
677 continue;
678 if (task_status(s->receiver_node->task) < 0)
679 continue;
680 btr_get_node_start(s->receiver_node->btrn, &rstime);
681 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
682 continue;
683 newest_rstime = rstime;
684 newest_slot = i;
685 }
686 if (newest_slot == -1)
687 return NULL;
688 return slot[newest_slot].receiver_node->btrn;
689 }
690
691 /* whether a new instance of a decoder should be started. */
692 static bool must_start_decoder(void)
693 {
694 int cafn = stat_task->current_audio_format_num;
695 unsigned vs = stat_task->vss_status;
696
697 if (audiod_status != AUDIOD_ON)
698 return false;
699 if (cafn < 0)
700 return false;
701 if (!stat_task->ct)
702 return false;
703 if (vs & VSS_STATUS_FLAG_NEXT)
704 return false;
705 if (!(vs & VSS_STATUS_FLAG_PLAYING))
706 return false;
707 if (receiver_running())
708 return false;
709 if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
710 return false;
711 return true;
712 }
713
714 static void compute_time_diff(const struct timeval *status_time)
715 {
716 struct timeval tmp, diff;
717 static unsigned count;
718 int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
719 const struct timeval max_deviation = {0, 500 * 1000};
720 const int time_smooth = 5;
721
722 sign = tv_diff(status_time, now, &diff);
723 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
724 // sign, sa_time_diff_sign);
725 if (!count) {
726 sa_time_diff_sign = sign;
727 stat_task->sa_time_diff = diff;
728 count++;
729 goto out;
730 }
731 if (count > 5) {
732 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
733 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
734 PARA_WARNING_LOG("time diff jump: %lums\n",
735 s * tv2ms(&tmp));
736 }
737 count++;
738 sa_time_diff_sign = tv_convex_combination(
739 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
740 count > 10? sign : sign * time_smooth, &diff,
741 &tmp);
742 stat_task->sa_time_diff = tmp;
743 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
744 sign < 0? "-" : "+",
745 tv2ms(&diff),
746 sa_time_diff_sign < 0? "-" : "+",
747 tv2ms(&stat_task->sa_time_diff)
748 );
749 out:
750 stat_task->sa_time_diff_sign = sa_time_diff_sign;
751 }
752
753 static int update_item(int itemnum, char *buf)
754 {
755 long unsigned sec, usec;
756
757 if (stat_task->clock_diff_count && itemnum != SI_current_time)
758 return 1;
759 free(stat_item_values[itemnum]);
760 stat_item_values[itemnum] = para_strdup(buf);
761 stat_client_write_item(itemnum);
762 switch (itemnum) {
763 case SI_status_flags:
764 stat_task->vss_status = 0;
765 if (strchr(buf, 'N'))
766 stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
767 if (strchr(buf, 'P'))
768 stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
769 break;
770 case SI_offset:
771 stat_task->offset_seconds = atoi(buf);
772 break;
773 case SI_seconds_total:
774 stat_task->length_seconds = atoi(buf);
775 break;
776 case SI_stream_start:
777 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
778 stat_task->server_stream_start.tv_sec = sec;
779 stat_task->server_stream_start.tv_usec = usec;
780 }
781 break;
782 case SI_current_time:
783 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
784 struct timeval tv = {sec, usec};
785 compute_time_diff(&tv);
786 }
787 break;
788 case SI_format:
789 stat_task->current_audio_format_num
790 = get_audio_format_num(buf);
791 }
792 return 1;
793 }
794
795 static int parse_stream_command(const char *txt, const char **cmd)
796 {
797 int ret, len;
798 char *re, *p = strchr(txt, ':');
799
800 if (!p)
801 return -E_MISSING_COLON;
802 *cmd = p + 1;
803 len = p - txt;
804 re = malloc(len + 1);
805 strncpy(re, txt, len);
806 re[len] = '\0';
807 ret = get_matching_audio_format_nums(re);
808 free(re);
809 return ret;
810 }
811
812 static int add_filter(int format, const char *cmdline)
813 {
814 struct audio_format_info *a = &afi[format];
815 int filter_num, nf = a->num_filters;
816 void *cfg;
817 struct lls_parse_result *flpr;
818
819 filter_num = filter_setup(cmdline, &cfg, &flpr);
820 a->filter_lpr = para_realloc(a->filter_lpr,
821 (nf + 1) * sizeof(flpr));
822 a->filter_conf = para_realloc(a->filter_conf,
823 (nf + 1) * sizeof(void *));
824 a->filter_nums = para_realloc(a->filter_nums,
825 (nf + 1) * sizeof(unsigned));
826
827 a->filter_nums[nf] = filter_num;
828 a->filter_conf[nf] = cfg;
829 a->filter_lpr[nf] = flpr;
830 a->num_filters++;
831 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
832 filter_name(filter_num));
833 return filter_num;
834 }
835
836 static int parse_writer_args(void)
837 {
838 int i, ret;
839 const char *cmd;
840 struct audio_format_info *a;
841
842 for (i = 0; i < OPT_GIVEN(WRITER); i++) {
843 int j, nw, af_mask;
844
845 ret = parse_stream_command(lls_string_val(i,
846 OPT_RESULT(WRITER)), &cmd);
847 if (ret < 0)
848 return ret;
849 af_mask = ret;
850 FOR_EACH_AUDIO_FORMAT(j) {
851 a = afi + j;
852 if ((af_mask & (1 << j)) == 0) /* no match */
853 continue;
854 nw = a->num_writers;
855 a->wids = para_realloc(a->wids, (nw + 1) * sizeof(int));
856 a->writer_lpr = para_realloc(a->writer_lpr,
857 (nw + 1) * sizeof(struct lls_parse_result *));
858 a->wids[nw] = check_writer_arg_or_die(cmd,
859 a->writer_lpr + nw);
860 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[j],
861 nw, writer_name(a->wids[nw]));
862 a->num_writers++;
863 }
864 }
865 /* Use default writer for audio formats which are not yet set up. */
866 FOR_EACH_AUDIO_FORMAT(i) {
867 a = afi + i;
868 if (a->num_writers > 0)
869 continue; /* already set up */
870 a->num_writers = 1;
871 a->wids = para_malloc(sizeof(int));
872 a->writer_lpr = para_malloc(sizeof(struct lls_parse_result *));
873 a->wids[0] = check_writer_arg_or_die(NULL, a->writer_lpr);
874 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats[i],
875 writer_name(a->wids[0]));
876 }
877 return 1;
878 }
879
880 static int parse_receiver_args(void)
881 {
882 int i, ret;
883 const char *arg;
884 struct audio_format_info *a;
885
886 FOR_EACH_AUDIO_FORMAT(i)
887 afi[i].receiver_num = -1;
888 for (i = OPT_GIVEN(RECEIVER) - 1; i >= 0; i--) {
889 int j, af_mask;
890
891 ret = parse_stream_command(lls_string_val(i,
892 OPT_RESULT(RECEIVER)), &arg);
893 if (ret < 0)
894 goto out;
895 af_mask = ret;
896 FOR_EACH_AUDIO_FORMAT(j) {
897 a = afi + j;
898 if ((af_mask & (1 << j)) == 0) /* no match */
899 continue;
900 /*
901 * If multiple receivers are given for this audio format, the
902 * last one wins and we have to free the previous receiver
903 * config here. Since we are iterating backwards, the winning
904 * receiver arg is in fact the first one given.
905 */
906 lls_free_parse_result(a->receiver_lpr, RECEIVER_CMD(a));
907 a->receiver_num = check_receiver_arg(arg, &a->receiver_lpr);
908 }
909 }
910 /*
911 * Use the default receiver for those audio formats for which no
912 * receiver was specified.
913 */
914 FOR_EACH_AUDIO_FORMAT(i) {
915 a = afi + i;
916 if (a->receiver_num >= 0)
917 continue;
918 a->receiver_num = check_receiver_arg(NULL, &a->receiver_lpr);
919 }
920 FOR_EACH_AUDIO_FORMAT(i) {
921 a = afi + i;
922 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
923 audio_formats[i], lls_command_name(RECEIVER_CMD(a)));
924 }
925 ret = 1;
926 out:
927 return ret;
928 }
929
930 static int init_default_filters(void)
931 {
932 int i, ret = 1;
933
934 FOR_EACH_AUDIO_FORMAT(i) {
935 struct audio_format_info *a = &afi[i];
936 const char *name = lls_command_name(RECEIVER_CMD(a));
937 char *tmp;
938 int j;
939
940 if (a->num_filters)
941 continue; /* no default -- nothing to to */
942 /*
943 * udp and dccp streams are fec-encoded, so add fecdec as the
944 * first filter.
945 */
946 if (strcmp(name, "udp") == 0 || strcmp(name, "dccp") == 0) {
947 tmp = para_strdup("fecdec");
948 add_filter(i, tmp);
949 free(tmp);
950 if (ret < 0)
951 goto out;
952 }
953 /* add "dec" to audio format name */
954 tmp = make_message("%sdec", audio_formats[i]);
955 for (j = 1; filter_get(j); j++)
956 if (!strcmp(tmp, filter_name(j)))
957 break;
958 free(tmp);
959 ret = -E_UNSUPPORTED_FILTER;
960 if (!filter_get(j))
961 goto out;
962 tmp = para_strdup(filter_name(j));
963 ret = add_filter(i, tmp);
964 free(tmp);
965 if (ret < 0)
966 goto out;
967 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
968 filter_name(j));
969 }
970 out:
971 return ret;
972 }
973
974 static int parse_filter_args(void)
975 {
976 int i, j, ret, af_mask, num_matches;
977
978 for (i = 0; i < OPT_GIVEN(FILTER); i++) {
979 const char *arg;
980 ret = parse_stream_command(lls_string_val(i,
981 OPT_RESULT(FILTER)), &arg);
982 if (ret < 0)
983 goto out;
984 af_mask = ret;
985 num_matches = 0;
986 FOR_EACH_AUDIO_FORMAT(j) {
987 if ((af_mask & (1 << j)) == 0) /* no match */
988 continue;
989 ret = add_filter(j, arg);
990 if (ret < 0)
991 goto out;
992 num_matches++;
993 }
994 if (num_matches == 0)
995 PARA_WARNING_LOG("ignoring filter spec: %s\n",
996 lls_string_val(i, OPT_RESULT(FILTER)));
997 }
998 ret = init_default_filters(); /* use default values for the rest */
999 out:
1000 return ret;
1001 }
1002
1003 static int parse_stream_args(void)
1004 {
1005 int ret;
1006
1007 ret = parse_receiver_args();
1008 if (ret < 0)
1009 return ret;
1010 ret = parse_filter_args();
1011 if (ret < 0)
1012 return ret;
1013 ret = parse_writer_args();
1014 if (ret < 0)
1015 return ret;
1016 return 1;
1017 }
1018
1019 /* does not unlink socket on errors */
1020 static void init_local_socket(struct command_task *ct)
1021 {
1022 if (OPT_GIVEN(SOCKET))
1023 socket_name = para_strdup(OPT_STRING_VAL(SOCKET));
1024 else {
1025 char *hn = para_hostname();
1026 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1027 hn);
1028 free(hn);
1029 }
1030 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
1031 if (OPT_GIVEN(FORCE))
1032 unlink(socket_name);
1033 ct->fd = create_local_socket(socket_name);
1034 if (ct->fd >= 0)
1035 return;
1036 PARA_EMERG_LOG("%s\n", para_strerror(-ct->fd));
1037 exit(EXIT_FAILURE);
1038 }
1039
1040 static int signal_post_select(struct sched *s, void *context)
1041 {
1042 struct signal_task *st = context;
1043 int ret, signum;
1044
1045 ret = task_get_notification(st->task);
1046 if (ret < 0)
1047 return ret;
1048 signum = para_next_signal(&s->rfds);
1049 switch (signum) {
1050 case SIGINT:
1051 case SIGTERM:
1052 case SIGHUP:
1053 PARA_NOTICE_LOG("received signal %d\n", signum);
1054 task_notify_all(s, E_AUDIOD_SIGNAL);
1055 return -E_AUDIOD_SIGNAL;
1056 }
1057 return 0;
1058 }
1059
1060 static void command_pre_select(struct sched *s, void *context)
1061 {
1062 struct command_task *ct = context;
1063 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1064 }
1065
1066 static int command_post_select(struct sched *s, void *context)
1067 {
1068 int ret;
1069 struct command_task *ct = context;
1070 static struct timeval last_status_dump;
1071 struct timeval tmp, delay;
1072 bool force = false;
1073
1074 ret = task_get_notification(ct->task);
1075 if (ret < 0)
1076 return ret;
1077 ret = handle_connect(ct->fd, &s->rfds);
1078 if (ret < 0) {
1079 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1080 if (ret == -E_AUDIOD_TERM) {
1081 task_notify_all(s, -ret);
1082 return ret;
1083 }
1084 } else if (ret > 0)
1085 force = true;
1086 if (force == true)
1087 goto dump;
1088
1089 /* if last status dump was less than 500ms ago, do nothing */
1090 delay.tv_sec = 0;
1091 delay.tv_usec = 500 * 1000;
1092 tv_add(&last_status_dump, &delay, &tmp);
1093 if (tv_diff(now, &tmp, NULL) < 0)
1094 return 0;
1095
1096 /*
1097 * If last status dump was more than 5s ago, force update. Otherwise,
1098 * update only those items that have changed.
1099 */
1100 delay.tv_sec = 5;
1101 delay.tv_usec = 0;
1102 tv_add(&last_status_dump, &delay, &tmp);
1103 if (tv_diff(now, &tmp, NULL) > 0)
1104 force = true;
1105 dump:
1106 audiod_status_dump(force);
1107 last_status_dump = *now;
1108 return 1;
1109 }
1110
1111 static void init_command_task(struct command_task *ct)
1112 {
1113 init_local_socket(ct); /* doesn't return on errors */
1114
1115 ct->task = task_register(&(struct task_info) {
1116 .name = "command",
1117 .pre_select = command_pre_select,
1118 .post_select = command_post_select,
1119 .context = ct,
1120 }, &sched);
1121 }
1122
1123 static void close_stat_pipe(void)
1124 {
1125 if (!stat_task->ct)
1126 return;
1127 task_reap(&stat_task->ct->task);
1128 client_close(stat_task->ct);
1129 stat_task->ct = NULL;
1130 clear_and_dump_items();
1131 stat_task->length_seconds = 0;
1132 stat_task->offset_seconds = 0;
1133 stat_task->vss_status = 0;
1134 stat_task->current_audio_format_num = -1;
1135 audiod_status_dump(true);
1136 }
1137
1138 /* avoid busy loop if server is down */
1139 static void set_stat_task_restart_barrier(unsigned seconds)
1140 {
1141 struct timeval delay = {seconds, 0};
1142 tv_add(now, &delay, &stat_task->restart_barrier);
1143 }
1144
1145 static bool must_close_slot(int slot_num)
1146 {
1147 struct slot_info *s = &slot[slot_num];
1148 struct audio_format_info *a = afi + s->format;
1149 int i;
1150
1151 if (s->format < 0)
1152 return false;
1153 if (s->receiver_node && task_status(s->receiver_node->task) >= 0)
1154 return false;
1155 for (i = 0; i < a->num_filters; i++)
1156 if (s->fns && task_status(s->fns[i].task) >= 0)
1157 return false;
1158 if (a->num_writers > 0) {
1159 for (i = 0; i < a->num_writers; i++)
1160 if (s->wns && task_status(s->wns[i].task) >= 0)
1161 return false;
1162 } else {
1163 if (s->wns && task_status(s->wns[0].task) >= 0)
1164 return false;
1165 }
1166 return true;
1167 }
1168
1169 static void close_slot(int slot_num)
1170 {
1171 struct slot_info *s = slot + slot_num;
1172
1173 PARA_INFO_LOG("closing slot %d\n", slot_num);
1174 close_writers(s);
1175 close_filters(s);
1176 close_receiver(slot_num);
1177 clear_slot(slot_num);
1178 }
1179
1180 static void close_unused_slots(void)
1181 {
1182 int i;
1183 bool dump = false;
1184
1185 FOR_EACH_SLOT(i)
1186 if (must_close_slot(i)) {
1187 close_slot(i);
1188 dump = true;
1189 }
1190 if (dump)
1191 audiod_status_dump(true);
1192 }
1193
1194 /*
1195 * Cleanup all resources.
1196 *
1197 * This performs various cleanups, removes the audiod socket and closes the
1198 * connection to para_server.
1199 */
1200 static void audiod_cleanup(void)
1201 {
1202 if (socket_name)
1203 unlink(socket_name);
1204 close_stat_pipe();
1205 close_unused_slots();
1206 close_stat_clients();
1207 free(uid_whitelist);
1208 }
1209
1210 /*
1211 * Check if any receivers/filters/writers need to be started and do so if
1212 * necessary.
1213 */
1214 static void start_stop_decoders(void)
1215 {
1216 int ret;
1217 struct slot_info *sl;
1218
1219 close_unused_slots();
1220 if (audiod_status != AUDIOD_ON ||
1221 !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1222 return notify_receivers(E_NOT_PLAYING);
1223 if (!must_start_decoder())
1224 return;
1225 ret = open_receiver(stat_task->current_audio_format_num);
1226 if (ret < 0) {
1227 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1228 return;
1229 }
1230 sl = slot + ret;
1231 open_filters(sl);
1232 open_writers(sl);
1233 activate_grab_clients(&sched);
1234 btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1235 audiod_status_dump(true);
1236 }
1237
1238 static void status_pre_select(struct sched *s, void *context)
1239 {
1240 struct status_task *st = context;
1241 int i, ret, cafn = stat_task->current_audio_format_num;
1242
1243 if (must_start_decoder())
1244 goto min_delay;
1245 FOR_EACH_SLOT(i)
1246 if (must_close_slot(i))
1247 goto min_delay;
1248 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1249 if (ret > 0)
1250 goto min_delay;
1251 if (st->ct && audiod_status == AUDIOD_OFF)
1252 goto min_delay;
1253 if (!st->ct && audiod_status != AUDIOD_OFF)
1254 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1255 if (cafn >= 0)
1256 sched_request_barrier(&afi[cafn].restart_barrier, s);
1257 /*
1258 * If para_server is playing we'd like to have a smooth time display
1259 * even if we are running in standby mode. So we request a timeout that
1260 * expires at the next full second.
1261 */
1262 if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1263 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1264 return;
1265 min_delay:
1266 sched_min_delay(s);
1267 }
1268
1269 /* restart the client task if necessary */
1270 static int status_post_select(struct sched *s, void *context)
1271 {
1272 struct status_task *st = context;
1273 int ret;
1274
1275 ret = task_get_notification(st->task);
1276 if (ret < 0)
1277 return ret;
1278 if (audiod_status == AUDIOD_OFF) {
1279 if (!st->ct)
1280 goto out;
1281 if (task_status(st->ct->task) >= 0) {
1282 task_notify(st->ct->task, E_AUDIOD_OFF);
1283 goto out;
1284 }
1285 close_stat_pipe();
1286 st->clock_diff_count = OPT_UINT32_VAL(CLOCK_DIFF_COUNT);
1287 goto out;
1288 }
1289 if (st->ct) {
1290 char *buf;
1291 size_t sz;
1292
1293 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1294 if (ret < 0) {
1295 close_stat_pipe();
1296 goto out;
1297 }
1298 if (st->ct->status != CL_EXECUTING)
1299 goto out;
1300 if (ret == 0) {
1301 struct timeval diff;
1302 tv_diff(now, &st->last_status_read, &diff);
1303 if (diff.tv_sec > 61)
1304 task_notify(st->ct->task, E_STATUS_TIMEOUT);
1305 goto out;
1306 }
1307 btr_merge(st->btrn, st->min_iqs);
1308 sz = btr_next_buffer(st->btrn, &buf);
1309 ret = for_each_stat_item(buf, sz, update_item);
1310 if (ret < 0) {
1311 task_notify(st->ct->task, -ret);
1312 goto out;
1313 }
1314 if (sz != ret) {
1315 btr_consume(st->btrn, sz - ret);
1316 st->last_status_read = *now;
1317 st->min_iqs = 0;
1318 } else /* current status item crosses buffers */
1319 st->min_iqs = sz + 1;
1320 goto out;
1321 }
1322 btr_drain(st->btrn);
1323 st->current_audio_format_num = -1;
1324 if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1325 goto out;
1326 if (st->clock_diff_count) { /* get status only one time */
1327 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1328 int argc = 5;
1329 PARA_INFO_LOG("clock diff count: %u\n", st->clock_diff_count);
1330 st->clock_diff_count--;
1331 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1332 set_stat_task_restart_barrier(2);
1333
1334 } else {
1335 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1336 int argc = 4;
1337 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1338 set_stat_task_restart_barrier(5);
1339 }
1340 free(stat_item_values[SI_basename]);
1341 stat_item_values[SI_basename] = para_strdup(
1342 "no connection to para_server");
1343 stat_client_write_item(SI_basename);
1344 st->last_status_read = *now;
1345 out:
1346 start_stop_decoders();
1347 return 0;
1348 }
1349
1350 static void init_status_task(struct status_task *st)
1351 {
1352 memset(st, 0, sizeof(struct status_task));
1353 st->sa_time_diff_sign = 1;
1354 st->clock_diff_count = OPT_UINT32_VAL(CLOCK_DIFF_COUNT);
1355 st->current_audio_format_num = -1;
1356 st->btrn = btr_new_node(&(struct btr_node_description)
1357 EMBRACE(.name = "stat"));
1358
1359 stat_task->task = task_register(&(struct task_info) {
1360 .name = "stat",
1361 .pre_select = status_pre_select,
1362 .post_select = status_post_select,
1363 .context = stat_task,
1364 }, &sched);
1365 }
1366
1367 static void set_initial_status(void)
1368 {
1369 audiod_status = AUDIOD_ON;
1370 if (!OPT_GIVEN(MODE))
1371 return;
1372 if (!strcmp(OPT_STRING_VAL(MODE), "sb")) {
1373 audiod_status = AUDIOD_STANDBY;
1374 return;
1375 }
1376 if (!strcmp(OPT_STRING_VAL(MODE), "off")) {
1377 audiod_status = AUDIOD_OFF;
1378 return;
1379 }
1380 if (strcmp(OPT_STRING_VAL(MODE), "on"))
1381 PARA_WARNING_LOG("invalid mode\n");
1382 }
1383
1384 /**
1385 * Lookup the given UID in the whitelist.
1386 *
1387 * The whitelist is the array of arguments to the --user-allow opion. If the
1388 * option was not given, the array is empty, in which case the check succeeds.
1389 *
1390 * \param uid User ID to look up.
1391 *
1392 * \return True if --user-allow was not given, or if uid matches an element of
1393 * the whitelist.
1394 */
1395 bool uid_is_whitelisted(uid_t uid)
1396 {
1397 int i;
1398
1399 if (!OPT_GIVEN(USER_ALLOW))
1400 return true;
1401 for (i = 0; i < OPT_GIVEN(USER_ALLOW); i++)
1402 if (uid == uid_whitelist[i])
1403 return true;
1404 return false;
1405 }
1406
1407 static void handle_help_flags(void)
1408 {
1409 char *help;
1410 bool d = OPT_GIVEN(DETAILED_HELP);
1411
1412 if (d)
1413 help = lls_long_help(CMD_PTR);
1414 else if (OPT_GIVEN(HELP))
1415 help = lls_short_help(CMD_PTR);
1416 else
1417 return;
1418 printf("%s\n", help);
1419 free(help);
1420 print_receiver_helps(d);
1421 print_filter_helps(d);
1422 print_writer_helps(d);
1423 exit(EXIT_SUCCESS);
1424 }
1425
1426 /**
1427 * the main function of para_audiod
1428 *
1429 * \param argc usual argument count
1430 * \param argv usual argument vector
1431 *
1432 * \return EXIT_SUCCESS or EXIT_FAILURE
1433 *
1434 * \sa para_audiod(1)
1435 * */
1436 int main(int argc, char *argv[])
1437 {
1438 int ret, i;
1439 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1440 char *errctx;
1441
1442 valid_fd_012();
1443 ret = lls(lls_parse(argc, argv, CMD_PTR, &lpr, &errctx));
1444 if (ret < 0)
1445 goto out;
1446 daemon_set_loglevel(ENUM_STRING_VAL(LOGLEVEL));
1447 daemon_drop_privileges_or_die(OPT_STRING_VAL(USER),
1448 OPT_STRING_VAL(GROUP));
1449 version_handle_flag("audiod", OPT_GIVEN(VERSION));
1450 handle_help_flags();
1451 parse_config_or_die();
1452 crypt_init();
1453 daemon_set_priority(OPT_UINT32_VAL(PRIORITY));
1454 recv_init();
1455 if (daemon_init_colors_or_die(OPT_UINT32_VAL(COLOR), COLOR_AUTO,
1456 COLOR_NO, OPT_GIVEN(LOGFILE))) {
1457 for (i = 0; i < OPT_GIVEN(LOG_COLOR); i++)
1458 daemon_set_log_color_or_die(lls_string_val(i,
1459 OPT_RESULT(LOG_COLOR)));
1460 }
1461 daemon_set_flag(DF_LOG_TIME);
1462 daemon_set_flag(DF_LOG_HOSTNAME);
1463 daemon_set_flag(DF_LOG_LL);
1464 if (OPT_GIVEN(LOG_TIMING))
1465 daemon_set_flag(DF_LOG_TIMING);
1466 if (OPT_GIVEN(LOGFILE)) {
1467 daemon_set_logfile(OPT_STRING_VAL(LOGFILE));
1468 daemon_open_log_or_die();
1469 }
1470 ret = parse_stream_args();
1471 if (ret < 0) {
1472 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1473 exit(EXIT_FAILURE);
1474 }
1475 daemon_log_welcome("audiod");
1476 daemon_set_start_time();
1477 set_initial_status();
1478 FOR_EACH_SLOT(i)
1479 clear_slot(i);
1480 setup_signal_handling();
1481
1482 init_status_task(stat_task);
1483 init_command_task(cmd_task);
1484
1485 if (OPT_GIVEN(DAEMON))
1486 daemonize(false /* parent exits immediately */);
1487
1488 signal_task->task = task_register(&(struct task_info) {
1489 .name = "signal",
1490 .pre_select = signal_pre_select,
1491 .post_select = signal_post_select,
1492 .context = signal_task,
1493 }, &sched);
1494
1495 sched.default_timeout.tv_sec = 2;
1496 sched.default_timeout.tv_usec = 999 * 1000;
1497 ret = schedule(&sched);
1498 audiod_cleanup();
1499 sched_shutdown(&sched);
1500 signal_shutdown(signal_task);
1501 crypt_shutdown();
1502 out:
1503 lls_free_parse_result(lpr, CMD_PTR);
1504 if (errctx)
1505 PARA_ERROR_LOG("%s\n", errctx);
1506 if (ret < 0)
1507 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1508 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
1509 }