More audiod fixes
[paraslash.git] / audiod.c
1 /*
2 * Copyright (C) 2005-2006 Andre Noll <noll@mathematik.tu-darmstadt.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file audiod.c the paraslash's audio daemon */
20
21 #include "para.h"
22
23 #include "audiod.cmdline.h"
24 #include "list.h"
25 #include "close_on_fork.h"
26 #include "sched.h"
27 #include "recv.h"
28 #include "filter.h"
29 #include "grab_client.cmdline.h"
30 #include "grab_client.h"
31
32 #include "error.h"
33 #include "audiod.h"
34 #include "net.h"
35 #include "daemon.h"
36 #include "string.h"
37 #include "fd.h"
38 #include "write.h"
39 #include "write_common.h"
40
41 /** define the array of error lists needed by para_audiod */
42 INIT_AUDIOD_ERRLISTS;
43 /** define the array containing all supported audio formats */
44 DEFINE_AUDIO_FORMAT_ARRAY;
45
46 /**
47 * the possible modes of operation
48 *
49 * - off: disconnect from para_server
50 * - on: receive status information from para_server and play the audio stream
51 * - sb: only receive status information but not the audio stream
52 */
53 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
54
55 /** defines how to handle one supported audio format */
56 struct audio_format_info {
57 /** pointer to the receiver for this audio format */
58 struct receiver *receiver;
59 /** the receiver configuration */
60 void *receiver_conf;
61 /** the number of filters that should be activated for this audio format */
62 unsigned int num_filters;
63 /** pointer to the array of filters to be activated */
64 struct filter **filters;
65 /** pointer to the array of filter configurations */
66 void **filter_conf;
67 /** the number of filters that should be activated for this audio format */
68 unsigned int num_writers;
69 /** pointer to the array of writers to be activated */
70 struct writer **writers;
71 /** pointer to the array of writer configurations */
72 void **writer_conf;
73 /** do not start receiver/filters/writer before this time */
74 struct timeval restart_barrier;
75 };
76
77 /**
78 * describes one instance of a receiver-filter-writer chain
79 *
80 * \sa receier_node, receiver, filter, filter_node, filter_chain, writer,
81 * writer_node, writer_node_group.
82 */
83 struct slot_info {
84 /** number of the audio format in this slot */
85 int format;
86 /** writer start time */
87 struct timeval wstime;
88 /** the receiver info associated with this slot */
89 struct receiver_node *receiver_node;
90 /** the active filter chain */
91 struct filter_chain *fc;
92 /** the active writer node group */
93 struct writer_node_group *wng;
94 };
95 static struct slot_info slot[MAX_STREAM_SLOTS];
96
97 extern const char *status_item_list[NUM_STAT_ITEMS];
98
99 static struct gengetopt_args_info conf;
100 static struct timeval server_stream_start, sa_time_diff;
101 static int playing, current_decoder = -1,
102 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
103 sa_time_diff_sign = 1;
104 static char *af_status, /* the audio format announced in server status */
105 *socket_name, *hostname;
106 static char *stat_item_values[NUM_STAT_ITEMS];
107 static FILE *logfile;
108 static const struct timeval restart_delay = {0, 200 * 1000};
109 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
110 static struct timeval *now;
111
112 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
113
114 /**
115 * the task for handling audiod commands
116 *
117 * \sa struct task, struct sched
118 */
119 struct command_task {
120 /** the local listening socket */
121 int fd;
122 /** the associated task structure */
123 struct task task;
124 };
125
126 /**
127 * the task for audiod's child (para_client stat)
128 *
129 * \sa struct task, struct sched
130 */
131 struct status_task {
132 /** the output of the stat command is read from this fd */
133 int fd;
134 /** stat data is stored here */
135 char buf[STRINGSIZE];
136 /** number of bytes loaded in \a buf */
137 unsigned loaded;
138 /** the associated task structure */
139 struct task task;
140 /** do not restart client command until this time */
141 struct timeval restart_barrier;
142 };
143 static struct status_task status_task_struct, *stat_task = &status_task_struct;
144
145 struct signal_task {
146 int fd;
147 int signum;
148 struct task task;
149 };
150
151 /** defines one command of para_audiod */
152 struct audiod_command {
153 /** the name of the command */
154 const char *name;
155 /** pointer to the function that handles the command */
156 int (*handler)(int, int, char**);
157 /**
158 * if the command prefers to handle the full line (rather than the usual
159 * argv[] array), it stores a pointer to the corresponding line handling
160 * function here. In this case, the above \a handler pointer must be NULL.
161 */
162 int (*line_handler)(int, char*);
163 /** one-line description of the command */
164 const char *description;
165 /** summary of the command line options */
166 const char *synopsis;
167 /** the long help text */
168 const char *help;
169 };
170 static int com_grab(int, char *);
171 static int com_cycle(int, int, char **);
172 static int com_help(int, int, char **);
173 static int com_kill(int, int, char **);
174 static int com_off(int, int, char **);
175 static int com_on(int, int, char **);
176 static int com_sb(int, int, char **);
177 static int com_stat(int, int, char **);
178 static int com_tasks(int, int, char **);
179 static int com_term(int, int, char **);
180 static struct audiod_command cmds[] = {
181 {
182 .name = "cycle",
183 .handler = com_cycle,
184 .description = "switch to next mode",
185 .synopsis = "cycle",
186 .help =
187
188 "on -> standby -> off -> on\n"
189
190 },
191 {
192 .name = "grab",
193 .line_handler = com_grab,
194 .description = "grab the audio stream",
195 .synopsis = "-- grab [grab_options]",
196 .help =
197
198 "grab ('splice') the audio stream at any position in the filter \n"
199 "chain and send that data back to the client. Try\n"
200 "\t para_audioc -- grab -h\n"
201 "for the list of available options.\n"
202 },
203
204 {
205 .name = "help",
206 .handler = com_help,
207 .description = "display command list or help for given command",
208 .synopsis = "help [command]",
209 .help =
210
211 "When I was younger, so much younger than today, I never needed\n"
212 "anybody's help in any way. But now these days are gone, I'm not so\n"
213 "self assured. Now I find I've changed my mind and opened up the doors.\n"
214 "\n"
215 " -- Beatles: Help\n"
216
217 },
218 {
219 .name = "kill",
220 .handler = com_kill,
221 .description = "kill an active audiod task",
222 .synopsis = "kill task_id [task_id ...]",
223 .help =
224
225 "call sched_unregister() and the event_handler of the given task(s)\n"
226
227 },
228 {
229 .name = "off",
230 .handler = com_off,
231 .description = "deactivate para_audiod",
232 .synopsis = "off",
233 .help =
234
235 "Close connection to para_server and stop all decoders.\n"
236
237 },
238 {
239 .name = "on",
240 .handler = com_on,
241 .description = "activate para_audiod",
242 .synopsis = "on",
243 .help =
244
245 "Establish connection to para_server, retrieve para_server's current\n"
246 "status. If playing, start corresponding decoder. Otherwise stop\n"
247 "all decoders.\n"
248
249 },
250 {
251 .name = "sb",
252 .handler = com_sb,
253 .description = "enter standby mode",
254 .synopsis = "sb",
255 .help =
256
257 "Stop all decoders but leave connection to para_server open.\n"
258
259 },
260 {
261 .name = "stat",
262 .handler = com_stat,
263 .description = "print status information",
264 .synopsis = "stat [item1 ...]",
265 .help =
266
267 "Dump given status items (all if none given) to stdout.\n"
268
269 },
270 {
271 .name = "tasks",
272 .handler = com_tasks,
273 .description = "list current tasks",
274 .synopsis = "tasks",
275 .help =
276
277 "print the list of task ids together with the status of each task\n"
278
279 },
280 {
281 .name = "term",
282 .handler = com_term,
283 .description = "terminate audiod",
284 .synopsis = "term",
285 .help =
286
287 "Stop all decoders, shut down connection to para_server and exit.\n"
288
289 },
290 {
291 .name = NULL,
292 }
293 };
294
295 /** iterate over all slots */
296 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
297 /** iterate over all supported audio formats */
298 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
299 /** iterate over the array of all audiod commands */
300 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
301
302 /**
303 * get the audio format number
304 * \param name the name of the audio format
305 *
306 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
307 * \a name is not a supported audio format.
308 */
309 int get_audio_format_num(char *name)
310 {
311 int i;
312 FOR_EACH_AUDIO_FORMAT(i)
313 if (!strcmp(name, audio_formats[i]))
314 return i;
315 return -E_UNSUPPORTED_AUDIO_FORMAT;
316 }
317
318 /*
319 * log function. first argument is loglevel.
320 */
321 void para_log(int ll, const char* fmt,...)
322 {
323 va_list argp;
324 FILE *outfd;
325 struct tm *tm;
326 time_t t1;
327 char str[MAXLINE] = "";
328
329 if (ll < conf.loglevel_arg)
330 return;
331 outfd = logfile? logfile : stderr;
332 time(&t1);
333 tm = localtime(&t1);
334 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
335 fprintf(outfd, "%s %s ", str, hostname);
336 if (conf.loglevel_arg <= INFO)
337 fprintf(outfd, "%i ", ll);
338 va_start(argp, fmt);
339 vfprintf(outfd, fmt, argp);
340 va_end(argp);
341 }
342
343 static int client_write(int fd, const char *buf)
344 {
345 size_t len = strlen(buf);
346 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
347 }
348
349 static char *get_time_string(struct timeval *newest_stime)
350 {
351 struct timeval diff, adj_stream_start, tmp;
352 int total = 0, use_server_time = 1;
353
354 if (!playing) {
355 if (length_seconds)
356 return NULL;
357 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
358 }
359 if (audiod_status == AUDIOD_OFF)
360 goto out;
361 if (sa_time_diff_sign > 0)
362 tv_diff(&server_stream_start, &sa_time_diff,
363 &adj_stream_start);
364 else
365 tv_add(&server_stream_start, &sa_time_diff,
366 &adj_stream_start);
367 tmp = adj_stream_start;
368 if (newest_stime && audiod_status == AUDIOD_ON) {
369 tv_diff(newest_stime, &adj_stream_start, &diff);
370 if (tv2ms(&diff) < 5000) {
371 tmp = *newest_stime;
372 use_server_time = 0;
373 }
374 }
375 tv_diff(now, &tmp, &diff);
376 total = diff.tv_sec + offset_seconds;
377 if (total > length_seconds)
378 total = length_seconds;
379 if (total < 0)
380 total = 0;
381 out:
382 return make_message(
383 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
384 status_item_list[SI_PLAY_TIME],
385 use_server_time? "~" : "",
386 total / 60,
387 total % 60,
388 (length_seconds - total) / 60,
389 (length_seconds - total) % 60,
390 length_seconds? (total * 100 + length_seconds / 2) /
391 length_seconds : 0,
392 length_seconds / 60,
393 length_seconds % 60
394 );
395 }
396
397 __malloc static char *audiod_status_string(void)
398 {
399 const char *status = (audiod_status == AUDIOD_ON)?
400 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
401 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
402 }
403
404 static struct timeval *wstime(void)
405 {
406 int i;
407 struct timeval *max = NULL;
408 FOR_EACH_SLOT(i) {
409 struct slot_info *s = &slot[i];
410 if (!s->wng)
411 continue;
412 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
413 continue;
414 max = &s->wstime;
415 }
416 return max;
417 }
418 __malloc static char *decoder_flags(void)
419 {
420 int i;
421 char decoder_flags[MAX_STREAM_SLOTS + 1];
422
423 FOR_EACH_SLOT(i) {
424 struct slot_info *s = &slot[i];
425 char flag = '0';
426 if (s->receiver_node)
427 flag += 1;
428 if (s->wng)
429 flag += 2;
430 decoder_flags[i] = flag;
431 }
432 decoder_flags[MAX_STREAM_SLOTS] = '\0';
433 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
434 decoder_flags);
435 }
436
437 static char *configfile_exists(void)
438 {
439 static char *config_file;
440
441 if (!config_file) {
442 char *home = para_homedir();
443 config_file = make_message("%s/.paraslash/audiod.conf", home);
444 free(home);
445 }
446 return file_exists(config_file)? config_file : NULL;
447 }
448
449 static void setup_signal_handling(void)
450 {
451 sig_task->fd = para_signal_init();
452 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
453 para_install_sighandler(SIGINT);
454 para_install_sighandler(SIGTERM);
455 para_install_sighandler(SIGCHLD);
456 para_install_sighandler(SIGHUP);
457 signal(SIGPIPE, SIG_IGN);
458 }
459
460 static void audiod_status_dump(void)
461 {
462 static char *p_ts, *p_us, *p_as, *p_df;
463 struct timeval *t = wstime();
464 char *us, *tmp = get_time_string(t);
465
466 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
467 stat_client_write(tmp, SI_PLAY_TIME);
468 free(p_ts);
469 p_ts = tmp;
470
471 us = uptime_str();
472 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
473 free(us);
474 if (!p_us || strcmp(p_us, tmp))
475 stat_client_write(tmp, SI_AUDIOD_UPTIME);
476 free(p_us);
477 p_us = tmp;
478
479 tmp = audiod_status_string();
480 if (!p_as || strcmp(p_as, tmp))
481 stat_client_write(tmp, SI_AUDIOD_STATUS);
482 free(p_as);
483 p_as = tmp;
484
485 tmp = decoder_flags();
486 if (!p_df || strcmp(p_df, tmp))
487 stat_client_write(tmp, SI_DECODER_FLAGS);
488 free(p_df);
489 p_df = tmp;
490 }
491
492 static void clear_slot(int slot_num)
493 {
494 struct slot_info *s = &slot[slot_num];
495
496 PARA_INFO_LOG("clearing slot %d\n", slot_num);
497 memset(s, 0, sizeof(struct slot_info));
498 s->format = -1;
499 }
500
501 static void close_receiver(int slot_num)
502 {
503 struct slot_info *s = &slot[slot_num];
504 struct audio_format_info *a;
505
506 if (s->format < 0 || !s->receiver_node)
507 return;
508 a = &afi[s->format];
509 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
510 audio_formats[s->format] , slot_num, s->receiver_node->eof);
511 // if (!s->receiver_node->eof)
512 // unregister_task(&s->receiver_node->task);
513 a->receiver->close(s->receiver_node);
514 free(s->receiver_node);
515 s->receiver_node = NULL;
516 /* set restart barrier */
517 tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
518 }
519
520 static void kill_all_decoders(void)
521 {
522 int i;
523
524 FOR_EACH_SLOT(i) {
525 struct slot_info *s = &slot[i];
526 if (s->wng && !s->wng->eof) {
527 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
528 i);
529 wng_unregister(s->wng);
530 s->wng->eof = 1;
531 }
532 if (s->fc && !s->fc->eof) {
533 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
534 unregister_task(&s->fc->task);
535 s->fc->eof = 1;
536 }
537 if (s->receiver_node && !s->receiver_node->eof) {
538 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
539 unregister_task(&s->receiver_node->task);
540 s->receiver_node->eof = 1;
541 }
542 }
543 }
544
545 static int get_empty_slot(void)
546 {
547 int i;
548 struct slot_info *s;
549
550 FOR_EACH_SLOT(i) {
551 s = &slot[i];
552 if (s->format < 0) {
553 clear_slot(i);
554 return i;
555 }
556 if (s->wng || s->receiver_node || s->fc)
557 continue;
558 clear_slot(i);
559 return i;
560 }
561 return -E_NO_MORE_SLOTS;
562 }
563
564 static int decoder_running(int format)
565 {
566 int i, ret = 0;
567 struct slot_info *s;
568
569 FOR_EACH_SLOT(i) {
570 s = &slot[i];
571 if (s->format == format && s->receiver_node)
572 ret |= 1;
573 if (s->format == format && s->wng)
574 ret |= 2;
575 }
576 return ret;
577 }
578
579 static void close_stat_pipe(void)
580 {
581 int i;
582
583 if (stat_task->fd < 0)
584 return;
585 PARA_NOTICE_LOG("%s", "closing status pipe\n");
586 close(stat_task->fd);
587 del_close_on_fork_list(stat_task->fd);
588 stat_task->fd = -1;
589 // kill_all_decoders();
590 for (i = 0; i < NUM_STAT_ITEMS; i++) {
591 free(stat_item_values[i]);
592 stat_item_values[i] = NULL;
593 }
594 dump_empty_status();
595 length_seconds = 0;
596 offset_seconds = 0;
597 audiod_status_dump();
598 playing = 0;
599 stat_item_values[SI_STATUS_BAR] = make_message(
600 "%s:no connection to para_server\n",
601 status_item_list[SI_STATUS_BAR]);
602 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
603 }
604
605 static void __noreturn clean_exit(int status, const char *msg)
606 {
607 PARA_EMERG_LOG("%s\n", msg);
608 if (socket_name)
609 unlink(socket_name);
610 if (stat_task->fd >= 0)
611 close_stat_pipe();
612 exit(status);
613 }
614
615 /**
616 * get the number of filters
617 *
618 * \param audio_format_num the number identifying the audio format
619 *
620 * \return the number of filters for the given audio format
621 *
622 * \sa struct filter;
623 */
624 int num_filters(int audio_format_num)
625 {
626 return afi[audio_format_num].num_filters;
627 }
628
629 static void filter_event_handler(struct task *t)
630 {
631 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
632 struct filter_chain *fc = t->private_data;
633 fc->eof = 1;
634 unregister_task(t);
635 }
636
637 static void open_filters(int slot_num)
638 {
639 struct slot_info *s = &slot[slot_num];
640 struct audio_format_info *a = &afi[s->format];
641 int nf = a->num_filters;
642 int i;
643
644 s->fc = NULL;
645 if (!nf)
646 return;
647 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
648 s->fc = para_calloc(sizeof(struct filter_chain));
649 INIT_LIST_HEAD(&s->fc->filters);
650 s->fc->inbuf = s->receiver_node->buf;
651 s->fc->in_loaded = &s->receiver_node->loaded;
652 s->fc->input_eof = &s->receiver_node->eof;
653 s->fc->task.pre_select = filter_pre_select;
654 s->fc->task.event_handler = filter_event_handler;
655 s->fc->task.private_data = s->fc;
656 s->fc->task.flags = 0;
657 s->fc->eof = 0;
658
659 s->receiver_node->output_eof = &s->fc->eof;
660 sprintf(s->fc->task.status, "filter chain");
661 for (i = 0; i < nf; i++) {
662 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
663 fn->conf = a->filter_conf[i];
664 fn->fc = s->fc;
665 fn->filter = a->filters[i];
666 INIT_LIST_HEAD(&fn->callbacks);
667 list_add_tail(&fn->node, &s->fc->filters);
668 fn->filter->open(fn);
669 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
670 audio_formats[s->format], i + 1, nf,
671 fn->filter->name, slot_num);
672 s->fc->outbuf = fn->buf;
673 s->fc->out_loaded = &fn->loaded;
674 }
675 register_task(&s->fc->task);
676 }
677
678 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
679 {
680 struct filter_node *fn;
681 int i, j;
682
683 FOR_EACH_SLOT(i) {
684 struct slot_info *s = &slot[i];
685 if (s->format < 0 || !s->fc)
686 continue;
687 if (slot_num >= 0 && slot_num != i)
688 continue;
689 if (format >= 0 && s->format != format)
690 continue;
691 if (num_filters(i) < filternum)
692 continue;
693 /* success */
694 j = 1;
695 list_for_each_entry(fn, &s->fc->filters, node)
696 if (filternum <= 0 || j++ == filternum)
697 break;
698 return fn;
699 }
700 return NULL;
701 }
702
703 static void wng_event_handler(struct task *t)
704 {
705 struct writer_node_group *wng = t->private_data;
706
707 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
708 wng->eof = 1;
709 wng_unregister(wng);
710 }
711
712 static void open_writers(int slot_num)
713 {
714 int ret, i;
715 struct slot_info *s = &slot[slot_num];
716 struct audio_format_info *a = &afi[s->format];
717
718 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
719 if (!a->num_writers)
720 s->wng = setup_default_wng();
721 else
722 s->wng = wng_new(a->num_writers);
723 if (s->fc) {
724 s->wng->buf = s->fc->outbuf;
725 s->wng->loaded = s->fc->out_loaded;
726 s->wng->input_eof = &s->fc->eof;
727 s->wng->channels = &s->fc->channels;
728 s->wng->samplerate = &s->fc->samplerate;
729 s->fc->output_eof = &s->wng->eof;
730 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
731 } else {
732 s->wng->buf = s->receiver_node->buf;
733 s->wng->loaded = &s->receiver_node->loaded;
734 s->wng->input_eof = &s->receiver_node->eof;
735 }
736 s->wng->task.event_handler = wng_event_handler;
737 for (i = 0; i < a->num_writers; i++) {
738 s->wng->writer_nodes[i].conf = a->writer_conf[i];
739 s->wng->writer_nodes[i].writer = a->writers[i];
740 sprintf(s->wng->writer_nodes[i].task.status, "writer_node");
741 }
742 ret = wng_open(s->wng);
743 if (ret < 0) {
744 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
745 return;
746 }
747 s->wstime = *now;
748 current_decoder = slot_num;
749 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
750 }
751
752 static void rn_event_handler(struct task *t)
753 {
754 struct receiver_node *rn = t->private_data;
755
756 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
757 unregister_task(t);
758 rn->eof = 1;
759 }
760
761 static void open_receiver(int format)
762 {
763 struct audio_format_info *a = &afi[format];
764 struct slot_info *s;
765 int ret, slot_num;
766 struct receiver_node *rn;
767
768 slot_num = get_empty_slot();
769 if (slot_num < 0)
770 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
771 s = &slot[slot_num];
772 s->format = format;
773 s->receiver_node = para_calloc(sizeof(struct receiver_node));
774 rn = s->receiver_node;
775 rn->receiver = a->receiver;
776 rn->conf = a->receiver_conf;
777 ret = a->receiver->open(s->receiver_node);
778 if (ret < 0) {
779 PARA_ERROR_LOG("failed to open receiver (%s)\n",
780 PARA_STRERROR(-ret));
781 free(s->receiver_node);
782 s->receiver_node = NULL;
783 return;
784 }
785 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
786 audio_formats[s->format], a->receiver->name, slot_num);
787 rn->task.private_data = s->receiver_node;
788 rn->task.pre_select = a->receiver->pre_select;
789 rn->task.post_select = a->receiver->post_select;
790 rn->task.event_handler = rn_event_handler;
791 rn->task.flags = 0;
792 sprintf(rn->task.status, "receiver node");
793 register_task(&rn->task);
794 }
795
796 static int is_frozen(int format)
797 {
798 struct audio_format_info *a = &afi[format];
799
800 return (tv_diff(now, &a->restart_barrier, NULL) > 0)? 0 : 1;
801 }
802
803 static void open_current_receiver(struct sched *s)
804 {
805 int i;
806
807 if (!af_status)
808 return;
809 i = get_audio_format_num(af_status);
810 if (i < 0)
811 return;
812 if (decoder_running(i) || is_frozen(i))
813 return;
814 open_receiver(i);
815 /*
816 * the receiver didn't get a chance to put his fd to the fd set.
817 * Make the upcoming select() return immediately to avoid a long
818 * timeout.
819 */
820 s->timeout.tv_sec = 0;
821 s->timeout.tv_usec = 1;
822 }
823
824 static void compute_time_diff(const struct timeval *status_time)
825 {
826 struct timeval tmp, diff;
827 static int count;
828 int sign;
829 const struct timeval max_deviation = {0, 500 * 1000};
830 const int time_smooth = 5;
831
832 sign = tv_diff(status_time, now, &diff);
833 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
834 // sign, sa_time_diff_sign);
835 if (!count) {
836 sa_time_diff_sign = sign;
837 sa_time_diff = diff;
838 count++;
839 return;
840 }
841 if (count > 5) {
842 int s = tv_diff(&diff, &sa_time_diff, &tmp);
843 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
844 PARA_WARNING_LOG("time diff jump: %lims\n",
845 s * tv2ms(&tmp));
846 }
847 count++;
848 sa_time_diff_sign = tv_convex_combination(
849 sa_time_diff_sign * time_smooth, &sa_time_diff,
850 count > 10? sign : sign * time_smooth, &diff,
851 &tmp);
852 sa_time_diff = tmp;
853 PARA_DEBUG_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
854 sign > 0? "+" : "-",
855 tv2ms(&diff),
856 sa_time_diff_sign ? "+" : "-",
857 tv2ms(&sa_time_diff)
858 );
859 }
860
861 static void check_stat_line(char *line)
862 {
863 int itemnum;
864 size_t ilen = 0;
865 long unsigned sec, usec;
866 char *tmp;
867
868 // PARA_INFO_LOG("line: %s\n", line);
869 if (!line)
870 return;
871 itemnum = stat_line_valid(line);
872 if (itemnum < 0) {
873 PARA_WARNING_LOG("invalid status line: %s\n", line);
874 return;
875 }
876 tmp = make_message("%s\n", line);
877 stat_client_write(tmp, itemnum);
878 free(tmp);
879 free(stat_item_values[itemnum]);
880 stat_item_values[itemnum] = para_strdup(line);
881 ilen = strlen(status_item_list[itemnum]);
882 switch (itemnum) {
883 case SI_STATUS:
884 playing = strstr(line, "playing")? 1 : 0;
885 break;
886 case SI_FORMAT:
887 free(af_status);
888 af_status = para_strdup(line + ilen + 1);
889 break;
890 case SI_OFFSET:
891 offset_seconds = atoi(line + ilen + 1);
892 break;
893 case SI_LENGTH:
894 length_seconds = atoi(line + ilen + 1);
895 break;
896 case SI_STREAM_START:
897 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
898 server_stream_start.tv_sec = sec;
899 server_stream_start.tv_usec = usec;
900 }
901 break;
902 case SI_CURRENT_TIME:
903 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
904 struct timeval tv = {sec, usec};
905 compute_time_diff(&tv);
906 }
907 break;
908 }
909 }
910
911 static void handle_signal(int sig)
912 {
913 switch (sig) {
914 case SIGCHLD:
915 for (;;) {
916 pid_t pid = para_reap_child();
917 if (pid <= 0)
918 return;
919 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
920 }
921 case SIGINT:
922 case SIGTERM:
923 case SIGHUP:
924 PARA_EMERG_LOG("terminating on signal %d\n", sig);
925 clean_exit(EXIT_FAILURE, "caught deadly signal");
926 return;
927 }
928 }
929
930 static void try_to_close_slot(int slot_num)
931 {
932 struct slot_info *s = &slot[slot_num];
933
934 if (s->format < 0)
935 return;
936 if (s->receiver_node && !s->receiver_node->eof)
937 return;
938 if (s->fc && !s->fc->eof)
939 return;
940 if (s->wng && !s->wng->eof)
941 return;
942 PARA_INFO_LOG("closing slot %d \n", slot_num);
943 wng_close(s->wng);
944 close_filters(s->fc);
945 free(s->fc);
946 close_receiver(slot_num);
947 clear_slot(slot_num);
948 }
949
950 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
951 {
952 int i;
953
954 t->ret = 1;
955 now = &s->now;
956 if (audiod_status != AUDIOD_ON || !playing)
957 kill_all_decoders();
958 else if (playing)
959 open_current_receiver(s);
960 FOR_EACH_SLOT(i) {
961 struct slot_info *s = &slot[i];
962 struct audio_format_info *a;
963
964 if (s->format < 0)
965 continue;
966 a = &afi[s->format];
967 if (!s->receiver_node)
968 continue;
969 if (!a->num_filters) {
970 if (s->receiver_node->loaded && !s->wng)
971 open_writers(i);
972 continue;
973 }
974 if (s->receiver_node->loaded && !s->fc) {
975 open_filters(i);
976 continue;
977 }
978 if (s->fc && *s->fc->out_loaded && !s->wng)
979 open_writers(i);
980 }
981 }
982
983 static void audiod_post_select(struct sched *s, __a_unused struct task *t)
984 {
985 int i;
986
987 /* save away the current time for other users */
988 now = &s->now;
989 t->ret = 1;
990 FOR_EACH_SLOT(i)
991 try_to_close_slot(i);
992 }
993
994 static void init_audiod_task(struct task *t)
995 {
996 t->pre_select = audiod_pre_select;
997 t->post_select = audiod_post_select;
998 t->event_handler = NULL;
999 t->private_data = t;
1000 t->flags = 0;
1001 sprintf(t->status, "audiod task");
1002 }
1003
1004 static int parse_stream_command(const char *txt, char **cmd)
1005 {
1006 char *p = strchr(txt, ':');
1007 int i;
1008
1009 if (!p)
1010 return -E_MISSING_COLON;
1011 p++;
1012 FOR_EACH_AUDIO_FORMAT(i) {
1013 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1014 continue;
1015 *cmd = p;
1016 return i;
1017 }
1018 return -E_UNSUPPORTED_AUDIO_FORMAT;
1019 }
1020
1021 static int add_filter(int format, char *cmdline)
1022 {
1023 struct audio_format_info *a = &afi[format];
1024 int filter_num, nf = a->num_filters;
1025
1026 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1027 if (filter_num < 0)
1028 return filter_num;
1029 a->filters[nf] = &filters[filter_num];
1030 a->num_filters++;
1031 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1032 a->filters[nf]->name);
1033 return filter_num;
1034 }
1035
1036 static int init_writers(void)
1037 {
1038 int i, ret, nw;
1039 char *cmd;
1040 struct audio_format_info *a;
1041
1042 init_supported_writers();
1043 nw = PARA_MAX(1, conf.writer_given);
1044 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
1045 FOR_EACH_AUDIO_FORMAT(i) {
1046 a = &afi[i];
1047 a->writer_conf = para_malloc(nw * sizeof(void *));
1048 a->writers = para_malloc(nw * sizeof(struct writer *));
1049 a->num_writers = 0;
1050 }
1051 for (i = 0; i < conf.writer_given; i++) {
1052 void *wconf;
1053 int writer_num;
1054 ret = parse_stream_command(conf.writer_arg[i], &cmd);
1055 if (ret < 0)
1056 goto out;
1057 a = &afi[ret];
1058 nw = a->num_writers;
1059 wconf = check_writer_arg(cmd, &writer_num);
1060 if (!wconf) {
1061 ret = writer_num;
1062 goto out;
1063 }
1064 a->writers[nw] = &writers[writer_num];
1065 a->writer_conf[nw] = wconf;
1066 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
1067 nw, writer_names[writer_num]);
1068 a->num_writers++;
1069 }
1070 ret = 1;
1071 out:
1072 return ret;
1073 }
1074
1075 static int init_receivers(void)
1076 {
1077 int i, ret, receiver_num;
1078 char *cmd = NULL;
1079 struct audio_format_info *a;
1080
1081 for (i = 0; receivers[i].name; i++) {
1082 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1083 receivers[i].init(&receivers[i]);
1084 }
1085 for (i = 0; i < conf.receiver_given; i++) {
1086 char *arg = conf.receiver_arg[i];
1087 char *recv = strchr(arg, ':');
1088 ret = -E_MISSING_COLON;
1089 if (!recv)
1090 goto out;
1091 *recv = '\0';
1092 recv++;
1093 ret = get_audio_format_num(arg);
1094 if (ret < 0)
1095 goto out;
1096 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1097 if (!afi[ret].receiver_conf) {
1098 ret = -E_RECV_SYNTAX;
1099 goto out;
1100 }
1101 afi[ret].receiver = &receivers[receiver_num];
1102 }
1103 /* use the first available receiver with no arguments
1104 * for those audio formats for which no receiver
1105 * was specified
1106 */
1107 cmd = para_strdup(receivers[0].name);
1108 FOR_EACH_AUDIO_FORMAT(i) {
1109 a = &afi[i];
1110 if (a->receiver_conf)
1111 continue;
1112 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1113 if (!a->receiver_conf)
1114 return -E_RECV_SYNTAX;
1115 a->receiver = &receivers[receiver_num];
1116 }
1117 ret = 1;
1118 out:
1119 free(cmd);
1120 return ret;
1121 }
1122
1123 static int init_default_filters(void)
1124 {
1125 int i, ret = 1;
1126
1127 FOR_EACH_AUDIO_FORMAT(i) {
1128 struct audio_format_info *a = &afi[i];
1129 char *tmp;
1130 int j;
1131
1132 if (a->num_filters)
1133 continue; /* no default -- nothing to to */
1134 /* add "dec" to audio format name */
1135 tmp = make_message("%sdec", audio_formats[i]);
1136 for (j = 0; filters[j].name; j++)
1137 if (!strcmp(tmp, filters[j].name))
1138 break;
1139 free(tmp);
1140 ret = -E_UNSUPPORTED_FILTER;
1141 if (!filters[j].name)
1142 goto out;
1143 tmp = para_strdup(filters[j].name);
1144 ret = add_filter(i, tmp);
1145 free(tmp);
1146 if (ret < 0)
1147 goto out;
1148 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1149 filters[j].name);
1150 }
1151 out:
1152 return ret;
1153 }
1154
1155 static int init_filters(void)
1156 {
1157 int i, ret, nf;
1158
1159 filter_init(filters);
1160 nf = PARA_MAX(1, conf.filter_given);
1161 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
1162 FOR_EACH_AUDIO_FORMAT(i) {
1163 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
1164 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1165 }
1166 if (!conf.no_default_filters_given)
1167 return init_default_filters();
1168 for (i = 0; i < conf.filter_given; i++) {
1169 char *arg = conf.filter_arg[i];
1170 char *filter_name = strchr(arg, ':');
1171 ret = -E_MISSING_COLON;
1172 if (!filter_name)
1173 goto out;
1174 *filter_name = '\0';
1175 filter_name++;
1176 ret = get_audio_format_num(arg);
1177 if (ret < 0)
1178 goto out;
1179 ret = add_filter(ret, filter_name);
1180 if (ret < 0)
1181 goto out;
1182 }
1183 ret = init_default_filters(); /* use default values for the rest */
1184 out:
1185 return ret;
1186 }
1187
1188 static int init_stream_io(void)
1189 {
1190 int ret;
1191
1192 ret = init_writers();
1193 if (ret < 0)
1194 return ret;
1195 ret = init_receivers();
1196 if (ret < 0)
1197 return ret;
1198 ret = init_filters();
1199 if (ret < 0)
1200 return ret;
1201 return 1;
1202 }
1203
1204 static int dump_commands(int fd)
1205 {
1206 char *buf = para_strdup(""), *tmp = NULL;
1207 int i;
1208 ssize_t ret;
1209
1210 FOR_EACH_COMMAND(i) {
1211 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1212 cmds[i].description);
1213 free(buf);
1214 buf = tmp;
1215 }
1216 ret = client_write(fd, buf);
1217 free(buf);
1218 return ret;
1219 }
1220
1221 /*
1222 * command handlers don't close their fd on errors (ret < 0) so that
1223 * its caller can send an error message. Otherwise (ret >= 0) it's up
1224 * to each individual command to close the fd if necessary.
1225 */
1226
1227 static int com_help(int fd, int argc, char **argv)
1228 {
1229 int i, ret;
1230 char *buf;
1231 const char *dflt = "No such command. Available commands:\n";
1232
1233 if (argc < 2) {
1234 ret = dump_commands(fd);
1235 goto out;
1236 }
1237 FOR_EACH_COMMAND(i) {
1238 if (strcmp(cmds[i].name, argv[1]))
1239 continue;
1240 buf = make_message(
1241 "NAME\n\t%s -- %s\n"
1242 "SYNOPSIS\n\tpara_audioc %s\n"
1243 "DESCRIPTION\n%s\n",
1244 argv[1],
1245 cmds[i].description,
1246 cmds[i].synopsis,
1247 cmds[i].help
1248 );
1249 ret = client_write(fd, buf);
1250 free(buf);
1251 goto out;
1252 }
1253 ret = client_write(fd, dflt);
1254 if (ret > 0)
1255 ret = dump_commands(fd);
1256 out:
1257 if (ret >= 0)
1258 close(fd);
1259 return ret;
1260 }
1261
1262 static int com_tasks(int fd, __a_unused int argc, __a_unused char **argv)
1263 {
1264 char *tl = get_task_list();
1265 int ret = 1;
1266 if (tl)
1267 ret = client_write(fd, tl);
1268 free(tl);
1269 if (ret > 0)
1270 close(fd);
1271 return ret;
1272 }
1273
1274 static int com_kill(int fd, int argc, char **argv)
1275 {
1276 int i, ret = 1;
1277 if (argc < 2)
1278 return -E_AUDIOD_SYNTAX;
1279 for (i = 1; i < argc; i++) {
1280 ret = kill_task(argv[i]);
1281 if (ret < 0)
1282 break;
1283 }
1284 if (ret > 0)
1285 close(fd);
1286 return ret;
1287 }
1288
1289 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1290 {
1291 int i, ret;
1292 char *buf = NULL;
1293 long unsigned mask = ~0LU;
1294
1295 if (argc > 1) {
1296 mask = 0;
1297 for (i = 1; i < argc; i++) {
1298 ret = stat_item_valid(argv[i]);
1299 if (ret < 0)
1300 return ret;
1301 mask |= (1 << ret);
1302 }
1303 }
1304 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1305 if (mask & (1 << SI_PLAY_TIME)) {
1306 struct timeval *t = wstime();
1307 char *ts = get_time_string(t);
1308 if (ts) {
1309 ret = client_write(fd, ts);
1310 if (ret < 0)
1311 goto out;
1312 free(ts);
1313 }
1314 }
1315 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1316 char *tmp, *us = uptime_str();
1317 tmp = make_message("%s:%s\n",
1318 status_item_list[SI_AUDIOD_UPTIME], us);
1319 free(us);
1320 ret = client_write(fd, tmp);
1321 if (ret < 0)
1322 goto out;
1323 free(tmp);
1324 }
1325 if (mask & (1 << SI_AUDIOD_STATUS)) {
1326 char *s = audiod_status_string();
1327 ret = client_write(fd, s);
1328 if (ret < 0)
1329 goto out;
1330 free(s);
1331 }
1332 if (mask & (1 << SI_DECODER_FLAGS)) {
1333 char *df =decoder_flags();
1334 ret = client_write(fd, df);
1335 if (ret < 0)
1336 goto out;
1337 free(df);
1338 }
1339
1340 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1341 char *tmp, *v;
1342 if (!((1 << i) & mask))
1343 continue;
1344 v = stat_item_values[i];
1345 tmp = make_message("%s%s%s", buf? buf: "",
1346 v? v : "", v? "\n" : "");
1347 free(buf);
1348 buf = tmp;
1349 }
1350 ret = client_write(fd, buf);
1351 out:
1352 if (ret > 0)
1353 ret = stat_client_add(fd, mask);
1354 free(buf);
1355 return ret;
1356 }
1357
1358 static int com_grab(int fd, char *cmdline)
1359 {
1360 struct grab_client *gc;
1361 struct filter_node *fn;
1362 int i, err;
1363 char *msg;
1364
1365 gc = grab_client_new(fd, cmdline, &err);
1366 if (!gc)
1367 goto err_out;
1368 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1369 if (fn)
1370 activate_grab_client(gc, fn);
1371 return 1;
1372 err_out:
1373 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1374 return err;
1375 if (err == -E_GC_HELP_GIVEN) {
1376 msg = make_message("%s\n\n", grab_client_args_info_usage);
1377 for (i = 0; grab_client_args_info_help[i]; i++) {
1378 char *tmp = make_message("%s%s\n", msg,
1379 grab_client_args_info_help[i]);
1380 free(msg);
1381 msg = tmp;
1382 }
1383 } else
1384 msg = make_message("%s %s\n",
1385 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1386 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1387 err = client_write(fd, msg);
1388 free(msg);
1389 if (err < 0)
1390 return err;
1391 close(fd);
1392 return 1;
1393 }
1394
1395 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1396 {
1397 close(fd);
1398 clean_exit(EXIT_SUCCESS, "terminating on user request");
1399 }
1400
1401 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1402 {
1403 audiod_status = AUDIOD_ON;
1404 close(fd);
1405 return 1;
1406 }
1407
1408 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1409 {
1410 audiod_status = AUDIOD_OFF;
1411 close(fd);
1412 return 1;
1413 }
1414
1415 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1416 {
1417 audiod_status = AUDIOD_STANDBY;
1418 close(fd);
1419 return 1;
1420 }
1421
1422 static int com_cycle(int fd, int argc, char **argv)
1423 {
1424 switch (audiod_status) {
1425 case AUDIOD_ON:
1426 return com_sb(fd, argc, argv);
1427 break;
1428 case AUDIOD_OFF:
1429 return com_on(fd, argc, argv);
1430 break;
1431 case AUDIOD_STANDBY:
1432 return com_off(fd, argc, argv);
1433 break;
1434 }
1435 close(fd);
1436 return 1;
1437 }
1438
1439 static int check_perms(uid_t uid)
1440 {
1441 int i;
1442
1443 if (!conf.user_allow_given)
1444 return 1;
1445 for (i = 0; i < conf.user_allow_given; i++)
1446 if (uid == conf.user_allow_arg[i])
1447 return 1;
1448 return -E_UCRED_PERM;
1449 }
1450
1451 static int handle_connect(int accept_fd)
1452 {
1453 int i, argc, ret, clifd = -1;
1454 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
1455 struct sockaddr_un unix_addr;
1456
1457 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
1458 if (ret < 0)
1459 goto out;
1460 clifd = ret;
1461 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1462 if (ret < 0)
1463 goto out;
1464 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
1465 ret = check_perms(ret);
1466 if (ret < 0)
1467 goto out;
1468 ret = -E_INVALID_AUDIOD_CMD;
1469 cmd = para_strdup(buf);
1470 p = strchr(cmd, '\n');
1471 if (!p)
1472 p = "";
1473 else {
1474 *p = '\0';
1475 p++;
1476 }
1477 for (i = 0; cmds[i].name; i++) {
1478 int j;
1479 if (strcmp(cmds[i].name, cmd))
1480 continue;
1481 if (cmds[i].handler) {
1482 argc = split_args(buf, &argv, "\n");
1483 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1484 ret = cmds[i].handler(clifd, argc, argv);
1485 goto out;
1486 }
1487 for (j = 0; p[j]; j++)
1488 if (p[j] == '\n')
1489 p[j] = ' ';
1490 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
1491 ret = cmds[i].line_handler(clifd, p);
1492 goto out;
1493 }
1494 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1495 out:
1496 free(cmd);
1497 free(buf);
1498 free(argv);
1499 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1500 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1501 client_write(clifd, tmp);
1502 free(tmp);
1503 close(clifd);
1504 }
1505 return ret;
1506 }
1507
1508 static int audiod_get_socket(void)
1509 {
1510 struct sockaddr_un unix_addr;
1511 int fd;
1512
1513 if (conf.socket_given)
1514 socket_name = para_strdup(conf.socket_arg);
1515 else {
1516 char *hn = para_hostname();
1517 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1518 hn);
1519 free(hn);
1520 }
1521 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
1522 if (conf.force_given)
1523 unlink(socket_name);
1524 fd = create_pf_socket(socket_name, &unix_addr,
1525 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1526 if (fd < 0) {
1527 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1528 exit(EXIT_FAILURE); /* do not unlink socket */
1529 }
1530 if (listen(fd , 5) < 0) {
1531 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1532 exit(EXIT_FAILURE); /* do not unlink socket */
1533 }
1534 add_close_on_fork_list(fd);
1535 return fd;
1536 }
1537
1538 static int open_stat_pipe(void)
1539 {
1540 int ret, fd[3] = {-1, 1, 0};
1541 pid_t pid;
1542 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1543 if (ret >= 0) {
1544 ret = fd[1];
1545 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1546 add_close_on_fork_list(ret);
1547 } else
1548 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1549 return ret;
1550 }
1551
1552 void signal_event_handler(struct task *t)
1553 {
1554 struct signal_task *st = t->private_data;
1555
1556 if (t->ret != -E_SIGNAL_CAUGHT)
1557 PARA_ERROR_LOG("%s (ignored)\n", PARA_STRERROR(-t->ret));
1558 else
1559 handle_signal(st->signum);
1560 }
1561
1562 void signal_pre_select(struct sched *s, struct task *t)
1563 {
1564 struct signal_task *st = t->private_data;
1565 t->ret = 1;
1566 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1567 }
1568
1569 void signal_post_select(struct sched *s, struct task *t)
1570 {
1571 struct signal_task *st = t->private_data;
1572 t->ret = 1;
1573 if (!FD_ISSET(st->fd, &s->rfds))
1574 return;
1575 t->ret = -E_SIGNAL_CAUGHT;
1576 st->signum = para_next_signal();
1577 }
1578
1579 void signal_setup_default(struct signal_task *st)
1580 {
1581 st->task.pre_select = signal_pre_select;
1582 st->task.post_select = signal_post_select;
1583 st->task.private_data = st;
1584 st->task.flags = 0;
1585 sprintf(st->task.status, "signal task");
1586 }
1587
1588 static void command_pre_select(struct sched *s, struct task *t)
1589 {
1590 struct command_task *ct = t->private_data;
1591 t->ret = 1;
1592 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1593
1594 }
1595
1596 static void command_post_select(struct sched *s, struct task *t)
1597 {
1598 int ret;
1599 struct command_task *ct = t->private_data;
1600
1601 t->ret = 1; /* always successful */
1602 if (audiod_status != AUDIOD_OFF)
1603 audiod_status_dump();
1604 if (!FD_ISSET(ct->fd, &s->rfds))
1605 return;
1606 ret = handle_connect(ct->fd);
1607 if (ret < 0)
1608 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1609 }
1610
1611 static void init_command_task(struct command_task *ct)
1612 {
1613 ct->task.pre_select = command_pre_select;
1614 ct->task.post_select = command_post_select;
1615 ct->task.event_handler = NULL;
1616 ct->task.private_data = ct;
1617 ct->task.flags = 0;
1618 ct->fd = audiod_get_socket(); /* doesn't return on errors */
1619 sprintf(ct->task.status, "command task");
1620 }
1621
1622 static void status_event_handler(__a_unused struct task *t)
1623 {
1624 struct timeval delay = {1, 0};
1625 int i;
1626 struct status_task *st = t->private_data;
1627
1628 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-t->ret));
1629 close_stat_pipe();
1630 /* avoid busy loop if server is down */
1631 tv_add(now, &delay, &st->restart_barrier);
1632 FOR_EACH_AUDIO_FORMAT(i)
1633 afi[i].restart_barrier = st->restart_barrier;
1634 }
1635
1636 static void status_pre_select(struct sched *s, struct task *t)
1637 {
1638 struct status_task *st = t->private_data;
1639 t->ret = 1;
1640 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
1641 close_stat_pipe();
1642 if (st->fd < 0 && audiod_status != AUDIOD_OFF
1643 && tv_diff(now, &st->restart_barrier, NULL) > 0) {
1644 st->fd = open_stat_pipe();
1645 st->loaded = 0;
1646 st->buf[0] = '\0';
1647 }
1648 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
1649 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1650 }
1651
1652 static void status_post_select(struct sched *s, struct task *t)
1653 {
1654 struct status_task *st = t->private_data;
1655
1656 t->ret = 1;
1657 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1658 return;
1659 t->ret = read(st->fd, st->buf + st->loaded, STRINGSIZE - 1 - st->loaded);
1660 if (t->ret <= 0) {
1661 if (!t->ret)
1662 t->ret = -E_STATUS_EOF;
1663 return;
1664 }
1665 st->buf[t->ret + st->loaded] = '\0';
1666 st->loaded = for_each_line(st->buf, t->ret + st->loaded,
1667 &check_stat_line);
1668 }
1669
1670 static void init_status_task(struct status_task *st)
1671 {
1672 memset(st, 0, sizeof(struct status_task));
1673 st->task.pre_select = status_pre_select;
1674 st->task.post_select = status_post_select;
1675 st->task.event_handler = status_event_handler;
1676 st->task.private_data = st;
1677 st->fd = -1;
1678 sprintf(st->task.status, "status task");
1679 }
1680
1681 static void set_initial_status(void)
1682 {
1683 audiod_status = AUDIOD_ON;
1684 if (!conf.mode_given)
1685 return;
1686 if (!strcmp(conf.mode_arg, "sb")) {
1687 audiod_status = AUDIOD_STANDBY;
1688 return;
1689 }
1690 if (!strcmp(conf.mode_arg, "off")) {
1691 audiod_status = AUDIOD_OFF;
1692 return;
1693 }
1694 if (strcmp(conf.mode_arg, "on"))
1695 PARA_WARNING_LOG("%s", "invalid mode\n");
1696 }
1697
1698 int main(int argc, char *argv[])
1699 {
1700 char *cf;
1701 int ret, i;
1702 struct sched s;
1703 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1704 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1705
1706 init_sched();
1707
1708 valid_fd_012();
1709 hostname = para_hostname();
1710 cmdline_parser(argc, argv, &conf);
1711 para_drop_privileges(conf.user_arg, conf.group_arg);
1712 cf = configfile_exists();
1713 if (cf) {
1714 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1715 PARA_EMERG_LOG("%s", "parse error in config file\n");
1716 exit(EXIT_FAILURE);
1717 }
1718 }
1719 if (conf.logfile_given)
1720 logfile = open_log(conf.logfile_arg);
1721 log_welcome("para_audiod", conf.loglevel_arg);
1722 i = init_stream_io();
1723 if (i < 0) {
1724 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1725 exit(EXIT_FAILURE);
1726 }
1727 server_uptime(UPTIME_SET);
1728 set_initial_status();
1729 FOR_EACH_SLOT(i)
1730 clear_slot(i);
1731 init_grabbing();
1732 setup_signal_handling();
1733 signal_setup_default(sig_task);
1734 sig_task->task.event_handler = signal_event_handler;
1735
1736 init_status_task(stat_task);
1737 init_command_task(cmd_task);
1738 init_audiod_task(audiod_task);
1739
1740 if (conf.daemon_given)
1741 daemon_init();
1742
1743 register_task(&sig_task->task);
1744 register_task(&cmd_task->task);
1745 register_task(&stat_task->task);
1746 register_task(audiod_task);
1747 s.default_timeout.tv_sec = 3;
1748 s.default_timeout.tv_usec = 99 * 1000;
1749 ret = sched(&s);
1750
1751 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1752 return EXIT_FAILURE;
1753 }