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