8f6f3560ee37cb6cbb927630bb583937d51693db
[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, 300 * 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 };
141 static struct status_task status_task_struct, *stat_task = &status_task_struct;
142
143 struct signal_task {
144 int fd;
145 int signum;
146 struct task task;
147 };
148
149 /** defines one command of para_audiod */
150 struct audiod_command {
151 /** the name of the command */
152 const char *name;
153 /** pointer to the function that handles the command */
154 int (*handler)(int, int, char**);
155 /**
156 * if the command prefers to handle the full line (rather than the usual
157 * argv[] array), it stores a pointer to the corresponding line handling
158 * function here. In this case, the above \a handler pointer must be NULL.
159 */
160 int (*line_handler)(int, char*);
161 /** one-line description of the command */
162 const char *description;
163 /** summary of the command line options */
164 const char *synopsis;
165 /** the long help text */
166 const char *help;
167 };
168 static int com_grab(int, char *);
169 static int com_cycle(int, int, char **);
170 static int com_help(int, int, char **);
171 static int com_off(int, int, char **);
172 static int com_on(int, int, char **);
173 static int com_sb(int, int, char **);
174 static int com_stat(int, int, char **);
175 static int com_term(int, int, char **);
176 static struct audiod_command cmds[] = {
177 {
178 .name = "cycle",
179 .handler = com_cycle,
180 .description = "switch to next mode",
181 .synopsis = "cycle",
182 .help =
183
184 "on -> standby -> off -> on\n"
185
186 },
187 {
188 .name = "grab",
189 .line_handler = com_grab,
190 .description = "grab the audio stream",
191 .synopsis = "-- grab [grab_options]",
192 .help =
193
194 "grab ('splice') the audio stream at any position in the filter \n"
195 "chain and send that data back to the client. Try\n"
196 "\t para_audioc -- grab -h\n"
197 "for the list of available options.\n"
198 },
199
200 {
201 .name = "help",
202 .handler = com_help,
203 .description = "display command list or help for given command",
204 .synopsis = "help [command]",
205 .help =
206
207 "When I was younger, so much younger than today, I never needed\n"
208 "anybody's help in any way. But now these days are gone, I'm not so\n"
209 "self assured. Now I find I've changed my mind and opened up the doors.\n"
210 "\n"
211 " -- Beatles: Help\n"
212
213 },
214 {
215 .name = "off",
216 .handler = com_off,
217 .description = "deactivate para_audiod",
218 .synopsis = "off",
219 .help =
220
221 "Close connection to para_server and stop all decoders.\n"
222
223 },
224 {
225 .name = "on",
226 .handler = com_on,
227 .description = "activate para_audiod",
228 .synopsis = "on",
229 .help =
230
231 "Establish connection to para_server, retrieve para_server's current\n"
232 "status. If playing, start corresponding decoder. Otherwise stop\n"
233 "all decoders.\n"
234
235 },
236 {
237 .name = "sb",
238 .handler = com_sb,
239 .description = "enter standby mode",
240 .synopsis = "sb",
241 .help =
242
243 "Stop all decoders but leave connection to para_server open.\n"
244
245 },
246 {
247 .name = "stat",
248 .handler = com_stat,
249 .description = "print status information",
250 .synopsis = "stat [item1 ...]",
251 .help =
252
253 "Dump given status items (all if none given) to stdout.\n"
254
255 },
256 {
257 .name = "term",
258 .handler = com_term,
259 .description = "terminate audiod",
260 .synopsis = "term",
261 .help =
262
263 "Stop all decoders, shut down connection to para_server and exit.\n"
264
265 },
266 {
267 .name = NULL,
268 }
269 };
270
271 /** iterate over all slots */
272 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
273 /** iterate over all supported audio formats */
274 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
275 /** iterate over the array of all audiod commands */
276 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
277
278 /**
279 * get the audio format number
280 * \param name the name of the audio format
281 *
282 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
283 * \a name is not a supported audio format.
284 */
285 int get_audio_format_num(char *name)
286 {
287 int i;
288 FOR_EACH_AUDIO_FORMAT(i)
289 if (!strcmp(name, audio_formats[i]))
290 return i;
291 return -E_UNSUPPORTED_AUDIO_FORMAT;
292 }
293
294 /*
295 * log function. first argument is loglevel.
296 */
297 void para_log(int ll, const char* fmt,...)
298 {
299 va_list argp;
300 FILE *outfd;
301 struct tm *tm;
302 time_t t1;
303 char str[MAXLINE] = "";
304
305 if (ll < conf.loglevel_arg)
306 return;
307 outfd = logfile? logfile : stderr;
308 time(&t1);
309 tm = localtime(&t1);
310 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
311 fprintf(outfd, "%s %s ", str, hostname);
312 if (conf.loglevel_arg <= INFO)
313 fprintf(outfd, "%i ", ll);
314 va_start(argp, fmt);
315 vfprintf(outfd, fmt, argp);
316 va_end(argp);
317 }
318
319 static int client_write(int fd, const char *buf)
320 {
321 size_t len = strlen(buf);
322 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
323 }
324
325 static char *get_time_string(struct timeval *newest_stime)
326 {
327 struct timeval diff, adj_stream_start, tmp;
328 int total = 0, use_server_time = 1;
329
330 if (!playing) {
331 if (length_seconds)
332 return NULL;
333 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
334 }
335 if (audiod_status == AUDIOD_OFF)
336 goto out;
337 if (sa_time_diff_sign > 0)
338 tv_diff(&server_stream_start, &sa_time_diff,
339 &adj_stream_start);
340 else
341 tv_add(&server_stream_start, &sa_time_diff,
342 &adj_stream_start);
343 tmp = adj_stream_start;
344 if (newest_stime && audiod_status == AUDIOD_ON) {
345 tv_diff(newest_stime, &adj_stream_start, &diff);
346 if (tv2ms(&diff) < 5000) {
347 tmp = *newest_stime;
348 use_server_time = 0;
349 }
350 }
351 tv_diff(now, &tmp, &diff);
352 total = diff.tv_sec + offset_seconds;
353 if (total > length_seconds)
354 total = length_seconds;
355 if (total < 0)
356 total = 0;
357 out:
358 return make_message(
359 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
360 status_item_list[SI_PLAY_TIME],
361 use_server_time? "~" : "",
362 total / 60,
363 total % 60,
364 (length_seconds - total) / 60,
365 (length_seconds - total) % 60,
366 length_seconds? (total * 100 + length_seconds / 2) /
367 length_seconds : 0,
368 length_seconds / 60,
369 length_seconds % 60
370 );
371 }
372
373 __malloc static char *audiod_status_string(void)
374 {
375 const char *status = (audiod_status == AUDIOD_ON)?
376 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
377 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
378 }
379
380 static struct timeval *wstime(void)
381 {
382 int i;
383 struct timeval *max = NULL;
384 FOR_EACH_SLOT(i) {
385 struct slot_info *s = &slot[i];
386 if (!s->wng)
387 continue;
388 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
389 continue;
390 max = &s->wstime;
391 }
392 return max;
393 }
394 __malloc static char *decoder_flags(void)
395 {
396 int i;
397 char decoder_flags[MAX_STREAM_SLOTS + 1];
398
399 FOR_EACH_SLOT(i) {
400 struct slot_info *s = &slot[i];
401 char flag = '0';
402 if (s->receiver_node)
403 flag += 1;
404 if (s->wng)
405 flag += 2;
406 decoder_flags[i] = flag;
407 }
408 decoder_flags[MAX_STREAM_SLOTS] = '\0';
409 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
410 decoder_flags);
411 }
412
413 static char *configfile_exists(void)
414 {
415 static char *config_file;
416
417 if (!config_file) {
418 char *home = para_homedir();
419 config_file = make_message("%s/.paraslash/audiod.conf", home);
420 free(home);
421 }
422 return file_exists(config_file)? config_file : NULL;
423 }
424
425 static void setup_signal_handling(void)
426 {
427 sig_task->fd = para_signal_init();
428 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
429 para_install_sighandler(SIGINT);
430 para_install_sighandler(SIGTERM);
431 para_install_sighandler(SIGCHLD);
432 para_install_sighandler(SIGHUP);
433 signal(SIGPIPE, SIG_IGN);
434 }
435
436 static void audiod_status_dump(void)
437 {
438 static char *p_ts, *p_us, *p_as, *p_df;
439 struct timeval *t = wstime();
440 char *us, *tmp = get_time_string(t);
441
442 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
443 stat_client_write(tmp, SI_PLAY_TIME);
444 free(p_ts);
445 p_ts = tmp;
446
447 us = uptime_str();
448 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
449 free(us);
450 if (!p_us || strcmp(p_us, tmp))
451 stat_client_write(tmp, SI_AUDIOD_UPTIME);
452 free(p_us);
453 p_us = tmp;
454
455 tmp = audiod_status_string();
456 if (!p_as || strcmp(p_as, tmp))
457 stat_client_write(tmp, SI_AUDIOD_STATUS);
458 free(p_as);
459 p_as = tmp;
460
461 tmp = decoder_flags();
462 if (!p_df || strcmp(p_df, tmp))
463 stat_client_write(tmp, SI_DECODER_FLAGS);
464 free(p_df);
465 p_df = tmp;
466 }
467
468 static void clear_slot(int slot_num)
469 {
470 struct slot_info *s = &slot[slot_num];
471
472 PARA_INFO_LOG("clearing slot %d\n", slot_num);
473 memset(s, 0, sizeof(struct slot_info));
474 s->format = -1;
475 }
476
477 static void close_receiver(int slot_num)
478 {
479 struct slot_info *s = &slot[slot_num];
480 struct audio_format_info *a;
481
482 if (s->format < 0 || !s->receiver_node)
483 return;
484 a = &afi[s->format];
485 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
486 audio_formats[s->format] , slot_num, s->receiver_node->eof);
487 if (!s->receiver_node->eof)
488 unregister_task(&s->receiver_node->task);
489 a->receiver->close(s->receiver_node);
490 free(s->receiver_node);
491 s->receiver_node = NULL;
492 /* set restart barrier */
493 tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
494 }
495
496 static void kill_all_decoders(void)
497 {
498 int i;
499
500 FOR_EACH_SLOT(i) {
501 struct slot_info *s = &slot[i];
502 if (s->wng && !s->wng->eof) {
503 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
504 i);
505 wng_unregister(s->wng);
506 s->wng->eof = 1;
507 }
508 if (s->fc && !s->fc->eof) {
509 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
510 unregister_task(&s->fc->task);
511 s->fc->eof = 1;
512 }
513 if (s->receiver_node && !s->receiver_node->eof) {
514 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
515 unregister_task(&s->receiver_node->task);
516 s->receiver_node->eof = 1;
517 }
518 }
519 }
520
521 static int get_empty_slot(void)
522 {
523 int i;
524 struct slot_info *s;
525
526 FOR_EACH_SLOT(i) {
527 s = &slot[i];
528 if (s->format < 0) {
529 clear_slot(i);
530 return i;
531 }
532 if (s->wng || s->receiver_node || s->fc)
533 continue;
534 clear_slot(i);
535 return i;
536 }
537 return -E_NO_MORE_SLOTS;
538 }
539
540 static int decoder_running(int format)
541 {
542 int i, ret = 0;
543 struct slot_info *s;
544
545 FOR_EACH_SLOT(i) {
546 s = &slot[i];
547 if (s->format == format && s->receiver_node)
548 ret |= 1;
549 if (s->format == format && s->wng)
550 ret |= 2;
551 }
552 return ret;
553 }
554
555 static void close_stat_pipe(void)
556 {
557 int i;
558
559 if (stat_task->fd < 0)
560 return;
561 PARA_NOTICE_LOG("%s", "closing status pipe\n");
562 close(stat_task->fd);
563 del_close_on_fork_list(stat_task->fd);
564 stat_task->fd = -1;
565 kill_all_decoders();
566 for (i = 0; i < NUM_STAT_ITEMS; i++) {
567 free(stat_item_values[i]);
568 stat_item_values[i] = NULL;
569 }
570 dump_empty_status();
571 length_seconds = 0;
572 offset_seconds = 0;
573 audiod_status_dump();
574 playing = 0;
575 stat_item_values[SI_STATUS_BAR] = make_message(
576 "%s:no connection to para_server\n",
577 status_item_list[SI_STATUS_BAR]);
578 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
579 }
580
581 static void __noreturn clean_exit(int status, const char *msg)
582 {
583 PARA_EMERG_LOG("%s\n", msg);
584 if (socket_name)
585 unlink(socket_name);
586 if (stat_task->fd >= 0)
587 close_stat_pipe();
588 exit(status);
589 }
590
591 /**
592 * get the number of filters
593 *
594 * \param audio_format_num the number identifying the audio format
595 *
596 * \return the number of filters for the given audio format
597 *
598 * \sa struct filter;
599 */
600 int num_filters(int audio_format_num)
601 {
602 return afi[audio_format_num].num_filters;
603 }
604
605 static void filter_event_handler(struct task *t)
606 {
607 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
608 unregister_task(t);
609 }
610
611 static void open_filters(int slot_num)
612 {
613 struct slot_info *s = &slot[slot_num];
614 struct audio_format_info *a = &afi[s->format];
615 int nf = a->num_filters;
616 int i;
617
618 s->fc = NULL;
619 if (!nf)
620 return;
621 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
622 s->fc = para_calloc(sizeof(struct filter_chain));
623 INIT_LIST_HEAD(&s->fc->filters);
624 s->fc->inbuf = s->receiver_node->buf;
625 s->fc->in_loaded = &s->receiver_node->loaded;
626 s->fc->input_eof = &s->receiver_node->eof;
627 s->fc->task.pre_select = filter_pre_select;
628 s->fc->task.event_handler = filter_event_handler;
629 s->fc->task.private_data = s->fc;
630 s->fc->task.flags = 0;
631 s->fc->eof = 0;
632
633 s->receiver_node->output_eof = &s->fc->eof;
634 sprintf(s->fc->task.status, "filter chain");
635 for (i = 0; i < nf; i++) {
636 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
637 fn->conf = a->filter_conf[i];
638 fn->fc = s->fc;
639 fn->filter = a->filters[i];
640 INIT_LIST_HEAD(&fn->callbacks);
641 list_add_tail(&fn->node, &s->fc->filters);
642 fn->filter->open(fn);
643 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
644 audio_formats[s->format], i + 1, nf,
645 fn->filter->name, slot_num);
646 s->fc->outbuf = fn->buf;
647 s->fc->out_loaded = &fn->loaded;
648 }
649 register_task(&s->fc->task);
650 }
651
652 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
653 {
654 struct filter_node *fn;
655 int i, j;
656
657 FOR_EACH_SLOT(i) {
658 struct slot_info *s = &slot[i];
659 if (s->format < 0 || !s->fc)
660 continue;
661 if (slot_num >= 0 && slot_num != i)
662 continue;
663 if (format >= 0 && s->format != format)
664 continue;
665 if (num_filters(i) < filternum)
666 continue;
667 /* success */
668 j = 1;
669 list_for_each_entry(fn, &s->fc->filters, node)
670 if (filternum <= 0 || j++ == filternum)
671 break;
672 return fn;
673 }
674 return NULL;
675 }
676
677 static void wng_event_handler(struct task *t)
678 {
679 struct writer_node_group *wng = t->private_data;
680 int i;
681
682 wng_unregister(wng);
683 FOR_EACH_SLOT(i) {
684 struct slot_info *s = &slot[i];
685 if (s->wng != wng)
686 continue;
687 PARA_INFO_LOG("slot %d: %s\n", i, PARA_STRERROR(-t->ret));
688 }
689 }
690
691 static void open_writers(int slot_num)
692 {
693 int ret, i;
694 struct slot_info *s = &slot[slot_num];
695 struct audio_format_info *a = &afi[s->format];
696
697 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
698 if (!a->num_writers)
699 s->wng = setup_default_wng();
700 else
701 s->wng = wng_new(a->num_writers);
702 if (s->fc) {
703 s->wng->buf = s->fc->outbuf;
704 s->wng->loaded = s->fc->out_loaded;
705 s->wng->input_eof = &s->fc->eof;
706 s->wng->channels = &s->fc->channels;
707 s->wng->samplerate = &s->fc->samplerate;
708 s->fc->output_eof = &s->wng->eof;
709 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
710 } else {
711 s->wng->buf = s->receiver_node->buf;
712 s->wng->loaded = &s->receiver_node->loaded;
713 s->wng->input_eof = &s->receiver_node->eof;
714 }
715 s->wng->task.event_handler = wng_event_handler;
716 for (i = 0; i < a->num_writers; i++) {
717 s->wng->writer_nodes[i].conf = a->writer_conf[i];
718 s->wng->writer_nodes[i].writer = a->writers[i];
719 sprintf(s->wng->writer_nodes[i].task.status, "writer_node");
720 }
721 ret = wng_open(s->wng); /* FIXME */
722 s->wstime = *now;
723 current_decoder = slot_num;
724 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
725 }
726
727 static void rn_event_handler(struct task *t)
728 {
729 // struct receiver_node *rn = t->private_data;
730 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
731 unregister_task(t);
732 }
733
734 static void open_receiver(int format)
735 {
736 struct audio_format_info *a = &afi[format];
737 struct slot_info *s;
738 int ret, slot_num;
739 struct receiver_node *rn;
740
741 slot_num = get_empty_slot();
742 if (slot_num < 0)
743 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
744 s = &slot[slot_num];
745 s->format = format;
746 s->receiver_node = para_calloc(sizeof(struct receiver_node));
747 rn = s->receiver_node;
748 rn->receiver = a->receiver;
749 rn->conf = a->receiver_conf;
750 ret = a->receiver->open(s->receiver_node);
751 if (ret < 0) {
752 PARA_ERROR_LOG("failed to open receiver (%s)\n",
753 PARA_STRERROR(-ret));
754 free(s->receiver_node);
755 s->receiver_node = NULL;
756 return;
757 }
758 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
759 audio_formats[s->format], a->receiver->name, slot_num);
760 rn->task.private_data = s->receiver_node;
761 rn->task.pre_select = a->receiver->pre_select;
762 rn->task.post_select = a->receiver->post_select;
763 rn->task.event_handler = rn_event_handler;
764 rn->task.flags = 0;
765 sprintf(rn->task.status, "receiver node");
766 register_task(&rn->task);
767 }
768
769 static int is_frozen(int format)
770 {
771 struct audio_format_info *a = &afi[format];
772
773 return (tv_diff(now, &a->restart_barrier, NULL) > 0)? 0 : 1;
774 }
775
776 static void open_current_receiver(void)
777 {
778 int i;
779
780 if (!af_status)
781 return;
782 i = get_audio_format_num(af_status);
783 if (i < 0)
784 return;
785 if (decoder_running(i) || is_frozen(i))
786 return;
787 open_receiver(i);
788 }
789
790 static void compute_time_diff(const struct timeval *status_time)
791 {
792 struct timeval tmp, diff;
793 static int count;
794 int sign;
795 const struct timeval max_deviation = {0, 500 * 1000};
796 const int time_smooth = 5;
797
798 sign = tv_diff(status_time, now, &diff);
799 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
800 // sign, sa_time_diff_sign);
801 if (!count) {
802 sa_time_diff_sign = sign;
803 sa_time_diff = diff;
804 count++;
805 return;
806 }
807 if (count > 5) {
808 int s = tv_diff(&diff, &sa_time_diff, &tmp);
809 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
810 PARA_WARNING_LOG("time diff jump: %lims\n",
811 s * tv2ms(&tmp));
812 }
813 count++;
814 sa_time_diff_sign = tv_convex_combination(
815 sa_time_diff_sign * time_smooth, &sa_time_diff,
816 count > 10? sign : sign * time_smooth, &diff,
817 &tmp);
818 sa_time_diff = tmp;
819 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
820 sign > 0? "+" : "-",
821 tv2ms(&diff),
822 sa_time_diff_sign ? "+" : "-",
823 tv2ms(&sa_time_diff)
824 );
825 }
826
827 static void check_stat_line(char *line)
828 {
829 int itemnum;
830 size_t ilen = 0;
831 long unsigned sec, usec;
832 char *tmp;
833
834 // PARA_INFO_LOG("line: %s\n", line);
835 if (!line)
836 return;
837 itemnum = stat_line_valid(line);
838 if (itemnum < 0) {
839 PARA_WARNING_LOG("invalid status line: %s\n", line);
840 return;
841 }
842 tmp = make_message("%s\n", line);
843 stat_client_write(tmp, itemnum);
844 free(tmp);
845 free(stat_item_values[itemnum]);
846 stat_item_values[itemnum] = para_strdup(line);
847 ilen = strlen(status_item_list[itemnum]);
848 switch (itemnum) {
849 case SI_STATUS:
850 playing = strstr(line, "playing")? 1 : 0;
851 break;
852 case SI_FORMAT:
853 free(af_status);
854 af_status = para_strdup(line + ilen + 1);
855 break;
856 case SI_OFFSET:
857 offset_seconds = atoi(line + ilen + 1);
858 break;
859 case SI_LENGTH:
860 length_seconds = atoi(line + ilen + 1);
861 break;
862 case SI_STREAM_START:
863 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
864 server_stream_start.tv_sec = sec;
865 server_stream_start.tv_usec = usec;
866 }
867 break;
868 case SI_CURRENT_TIME:
869 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
870 struct timeval tv = {sec, usec};
871 compute_time_diff(&tv);
872 }
873 break;
874 }
875 }
876
877 static void handle_signal(int sig)
878 {
879 switch (sig) {
880 case SIGCHLD:
881 for (;;) {
882 pid_t pid = para_reap_child();
883 if (pid <= 0)
884 return;
885 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
886 }
887 case SIGINT:
888 case SIGTERM:
889 case SIGHUP:
890 PARA_EMERG_LOG("terminating on signal %d\n", sig);
891 clean_exit(EXIT_FAILURE, "caught deadly signal");
892 return;
893 }
894 }
895
896 static void try_to_close_slot(int slot_num)
897 {
898 struct slot_info *s = &slot[slot_num];
899
900 if (s->format < 0)
901 return;
902 if (s->receiver_node && !s->receiver_node->eof)
903 return;
904 if (s->fc && !s->fc->eof)
905 return;
906 if (s->wng && !s->wng->eof)
907 return;
908 PARA_INFO_LOG("closing slot %d \n", slot_num);
909 wng_close(s->wng);
910 close_filters(s->fc);
911 free(s->fc);
912 close_receiver(slot_num);
913 clear_slot(slot_num);
914 }
915
916 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
917 {
918 int i;
919
920 t->ret = 1;
921 now = &s->now;
922 if (audiod_status != AUDIOD_ON)
923 kill_all_decoders();
924 else if (playing)
925 open_current_receiver();
926 FOR_EACH_SLOT(i) {
927 struct slot_info *s = &slot[i];
928 struct audio_format_info *a;
929
930 try_to_close_slot(i);
931 if (s->format < 0)
932 continue;
933 a = &afi[s->format];
934 if (!s->receiver_node)
935 continue;
936 if (!a->num_filters) {
937 if (s->receiver_node->loaded && !s->wng)
938 open_writers(i);
939 continue;
940 }
941 if (s->receiver_node->loaded && !s->fc) {
942 open_filters(i);
943 continue;
944 }
945 if (s->fc && *s->fc->out_loaded && !s->wng)
946 open_writers(i);
947 }
948 }
949
950 static void audiod_post_select(struct sched *s, __a_unused struct task *t)
951 {
952 /* only save away the current time for other users */
953 now = &s->now;
954 t->ret = 1;
955 }
956
957 static void init_audiod_task(struct task *t)
958 {
959 t->pre_select = audiod_pre_select;
960 t->post_select = audiod_post_select;
961 t->event_handler = NULL;
962 t->private_data = t;
963 t->flags = 0;
964 sprintf(t->status, "audiod task");
965 }
966
967 static int parse_stream_command(const char *txt, char **cmd)
968 {
969 char *p = strchr(txt, ':');
970 int i;
971
972 if (!p)
973 return -E_MISSING_COLON;
974 p++;
975 FOR_EACH_AUDIO_FORMAT(i) {
976 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
977 continue;
978 *cmd = p;
979 return i;
980 }
981 return -E_UNSUPPORTED_AUDIO_FORMAT;
982 }
983
984 static int add_filter(int format, char *cmdline)
985 {
986 struct audio_format_info *a = &afi[format];
987 int filter_num, nf = a->num_filters;
988
989 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
990 if (filter_num < 0)
991 return filter_num;
992 a->filters[nf] = &filters[filter_num];
993 a->num_filters++;
994 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
995 a->filters[nf]->name);
996 return filter_num;
997 }
998
999 static int init_writers(void)
1000 {
1001 int i, ret, nw;
1002 char *cmd;
1003 struct audio_format_info *a;
1004
1005 init_supported_writers();
1006 nw = PARA_MAX(1, conf.writer_given);
1007 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
1008 FOR_EACH_AUDIO_FORMAT(i) {
1009 a = &afi[i];
1010 a->writer_conf = para_malloc(nw * sizeof(void *));
1011 a->writers = para_malloc(nw * sizeof(struct writer *));
1012 a->num_writers = 0;
1013 }
1014 for (i = 0; i < conf.writer_given; i++) {
1015 void *wconf;
1016 int writer_num;
1017 ret = parse_stream_command(conf.writer_arg[i], &cmd);
1018 if (ret < 0)
1019 goto out;
1020 a = &afi[ret];
1021 nw = a->num_writers;
1022 wconf = check_writer_arg(cmd, &writer_num);
1023 if (!wconf) {
1024 ret = writer_num;
1025 goto out;
1026 }
1027 a->writers[nw] = &writers[writer_num];
1028 a->writer_conf[nw] = wconf;
1029 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
1030 nw, writer_names[writer_num]);
1031 a->num_writers++;
1032 }
1033 ret = 1;
1034 out:
1035 return ret;
1036 }
1037
1038 static int init_receivers(void)
1039 {
1040 int i, ret, receiver_num;
1041 char *cmd = NULL;
1042 struct audio_format_info *a;
1043
1044 for (i = 0; receivers[i].name; i++) {
1045 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1046 receivers[i].init(&receivers[i]);
1047 }
1048 for (i = 0; i < conf.receiver_given; i++) {
1049 char *arg = conf.receiver_arg[i];
1050 char *recv = strchr(arg, ':');
1051 ret = -E_MISSING_COLON;
1052 if (!recv)
1053 goto out;
1054 *recv = '\0';
1055 recv++;
1056 ret = get_audio_format_num(arg);
1057 if (ret < 0)
1058 goto out;
1059 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1060 if (!afi[ret].receiver_conf) {
1061 ret = -E_RECV_SYNTAX;
1062 goto out;
1063 }
1064 afi[ret].receiver = &receivers[receiver_num];
1065 }
1066 /* use the first available receiver with no arguments
1067 * for those audio formats for which no receiver
1068 * was specified
1069 */
1070 cmd = para_strdup(receivers[0].name);
1071 FOR_EACH_AUDIO_FORMAT(i) {
1072 a = &afi[i];
1073 if (a->receiver_conf)
1074 continue;
1075 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1076 if (!a->receiver_conf)
1077 return -E_RECV_SYNTAX;
1078 a->receiver = &receivers[receiver_num];
1079 }
1080 ret = 1;
1081 out:
1082 free(cmd);
1083 return ret;
1084 }
1085
1086 static int init_default_filters(void)
1087 {
1088 int i, ret = 1;
1089
1090 FOR_EACH_AUDIO_FORMAT(i) {
1091 struct audio_format_info *a = &afi[i];
1092 char *tmp;
1093 int j;
1094
1095 if (a->num_filters)
1096 continue; /* no default -- nothing to to */
1097 /* add "dec" to audio format name */
1098 tmp = make_message("%sdec", audio_formats[i]);
1099 for (j = 0; filters[j].name; j++)
1100 if (!strcmp(tmp, filters[j].name))
1101 break;
1102 free(tmp);
1103 ret = -E_UNSUPPORTED_FILTER;
1104 if (!filters[j].name)
1105 goto out;
1106 tmp = para_strdup(filters[j].name);
1107 ret = add_filter(i, tmp);
1108 free(tmp);
1109 if (ret < 0)
1110 goto out;
1111 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1112 filters[j].name);
1113 }
1114 out:
1115 return ret;
1116 }
1117
1118 static int init_filters(void)
1119 {
1120 int i, ret, nf;
1121
1122 filter_init(filters);
1123 nf = PARA_MAX(1, conf.filter_given);
1124 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
1125 FOR_EACH_AUDIO_FORMAT(i) {
1126 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
1127 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1128 }
1129 if (!conf.no_default_filters_given)
1130 return init_default_filters();
1131 for (i = 0; i < conf.filter_given; i++) {
1132 char *arg = conf.filter_arg[i];
1133 char *filter_name = strchr(arg, ':');
1134 ret = -E_MISSING_COLON;
1135 if (!filter_name)
1136 goto out;
1137 *filter_name = '\0';
1138 filter_name++;
1139 ret = get_audio_format_num(arg);
1140 if (ret < 0)
1141 goto out;
1142 ret = add_filter(ret, filter_name);
1143 if (ret < 0)
1144 goto out;
1145 }
1146 ret = init_default_filters(); /* use default values for the rest */
1147 out:
1148 return ret;
1149 }
1150
1151 static int init_stream_io(void)
1152 {
1153 int ret;
1154
1155 ret = init_writers();
1156 if (ret < 0)
1157 return ret;
1158 ret = init_receivers();
1159 if (ret < 0)
1160 return ret;
1161 ret = init_filters();
1162 if (ret < 0)
1163 return ret;
1164 return 1;
1165 }
1166
1167 static int dump_commands(int fd)
1168 {
1169 char *buf = para_strdup(""), *tmp = NULL;
1170 int i;
1171 ssize_t ret;
1172
1173 FOR_EACH_COMMAND(i) {
1174 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1175 cmds[i].description);
1176 free(buf);
1177 buf = tmp;
1178 }
1179 ret = client_write(fd, buf);
1180 free(buf);
1181 return ret;
1182 }
1183
1184 /*
1185 * command handlers don't close their fd on errors (ret < 0) so that
1186 * its caller can send an error message. Otherwise (ret >= 0) it's up
1187 * to each individual command to close the fd if necessary.
1188 */
1189
1190 static int com_help(int fd, int argc, char **argv)
1191 {
1192 int i, ret;
1193 char *buf;
1194 const char *dflt = "No such command. Available commands:\n";
1195
1196 if (argc < 2) {
1197 ret = dump_commands(fd);
1198 goto out;
1199 }
1200 FOR_EACH_COMMAND(i) {
1201 if (strcmp(cmds[i].name, argv[1]))
1202 continue;
1203 buf = make_message(
1204 "NAME\n\t%s -- %s\n"
1205 "SYNOPSIS\n\tpara_audioc %s\n"
1206 "DESCRIPTION\n%s\n",
1207 argv[1],
1208 cmds[i].description,
1209 cmds[i].synopsis,
1210 cmds[i].help
1211 );
1212 ret = client_write(fd, buf);
1213 free(buf);
1214 goto out;
1215 }
1216 ret = client_write(fd, dflt);
1217 if (ret > 0)
1218 ret = dump_commands(fd);
1219 out:
1220 if (ret >= 0)
1221 close(fd);
1222 return ret;
1223 }
1224
1225 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1226 {
1227 int i, ret;
1228 char *buf = NULL;
1229 long unsigned mask = ~0LU;
1230
1231 if (argc > 1) {
1232 mask = 0;
1233 for (i = 1; i < argc; i++) {
1234 ret = stat_item_valid(argv[i]);
1235 if (ret < 0)
1236 return ret;
1237 mask |= (1 << ret);
1238 }
1239 }
1240 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1241 if (mask & (1 << SI_PLAY_TIME)) {
1242 struct timeval *t = wstime();
1243 char *ts = get_time_string(t);
1244 if (ts) {
1245 ret = client_write(fd, ts);
1246 if (ret < 0)
1247 goto out;
1248 free(ts);
1249 }
1250 }
1251 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1252 char *tmp, *us = uptime_str();
1253 tmp = make_message("%s:%s\n",
1254 status_item_list[SI_AUDIOD_UPTIME], us);
1255 free(us);
1256 ret = client_write(fd, tmp);
1257 if (ret < 0)
1258 goto out;
1259 free(tmp);
1260 }
1261 if (mask & (1 << SI_AUDIOD_STATUS)) {
1262 char *s = audiod_status_string();
1263 ret = client_write(fd, s);
1264 if (ret < 0)
1265 goto out;
1266 free(s);
1267 }
1268 if (mask & (1 << SI_DECODER_FLAGS)) {
1269 char *df =decoder_flags();
1270 ret = client_write(fd, df);
1271 if (ret < 0)
1272 goto out;
1273 free(df);
1274 }
1275
1276 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1277 char *tmp, *v;
1278 if (!((1 << i) & mask))
1279 continue;
1280 v = stat_item_values[i];
1281 tmp = make_message("%s%s%s", buf? buf: "",
1282 v? v : "", v? "\n" : "");
1283 free(buf);
1284 buf = tmp;
1285 }
1286 ret = client_write(fd, buf);
1287 out:
1288 if (ret > 0)
1289 ret = stat_client_add(fd, mask);
1290 free(buf);
1291 return ret;
1292 }
1293
1294 static int com_grab(int fd, char *cmdline)
1295 {
1296 struct grab_client *gc;
1297 struct filter_node *fn;
1298 int i, err;
1299 char *msg;
1300
1301 gc = grab_client_new(fd, cmdline, &err);
1302 if (!gc)
1303 goto err_out;
1304 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1305 if (fn)
1306 activate_grab_client(gc, fn);
1307 return 1;
1308 err_out:
1309 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1310 return err;
1311 if (err == -E_GC_HELP_GIVEN) {
1312 msg = make_message("%s\n\n", grab_client_args_info_usage);
1313 for (i = 0; grab_client_args_info_help[i]; i++) {
1314 char *tmp = make_message("%s%s\n", msg,
1315 grab_client_args_info_help[i]);
1316 free(msg);
1317 msg = tmp;
1318 }
1319 } else
1320 msg = make_message("%s %s\n",
1321 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1322 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1323 err = client_write(fd, msg);
1324 free(msg);
1325 if (err < 0)
1326 return err;
1327 close(fd);
1328 return 1;
1329 }
1330
1331 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1332 {
1333 close(fd);
1334 clean_exit(EXIT_SUCCESS, "terminating on user request");
1335 }
1336
1337 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1338 {
1339 audiod_status = AUDIOD_ON;
1340 close(fd);
1341 return 1;
1342 }
1343
1344 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1345 {
1346 audiod_status = AUDIOD_OFF;
1347 close(fd);
1348 return 1;
1349 }
1350
1351 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1352 {
1353 audiod_status = AUDIOD_STANDBY;
1354 close(fd);
1355 return 1;
1356 }
1357
1358 static int com_cycle(int fd, int argc, char **argv)
1359 {
1360 switch (audiod_status) {
1361 case AUDIOD_ON:
1362 return com_sb(fd, argc, argv);
1363 break;
1364 case AUDIOD_OFF:
1365 return com_on(fd, argc, argv);
1366 break;
1367 case AUDIOD_STANDBY:
1368 return com_off(fd, argc, argv);
1369 break;
1370 }
1371 close(fd);
1372 return 1;
1373 }
1374
1375 static int check_perms(uid_t uid)
1376 {
1377 int i;
1378
1379 if (!conf.user_allow_given)
1380 return 1;
1381 for (i = 0; i < conf.user_allow_given; i++)
1382 if (uid == conf.user_allow_arg[i])
1383 return 1;
1384 return -E_UCRED_PERM;
1385 }
1386
1387 static int handle_connect(int accept_fd)
1388 {
1389 int i, argc, ret, clifd = -1;
1390 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
1391 struct sockaddr_un unix_addr;
1392
1393 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
1394 if (ret < 0)
1395 goto out;
1396 clifd = ret;
1397 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1398 if (ret < 0)
1399 goto out;
1400 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
1401 ret = check_perms(ret);
1402 if (ret < 0)
1403 goto out;
1404 ret = -E_INVALID_AUDIOD_CMD;
1405 cmd = para_strdup(buf);
1406 p = strchr(cmd, '\n');
1407 if (!p)
1408 p = "";
1409 else {
1410 *p = '\0';
1411 p++;
1412 }
1413 for (i = 0; cmds[i].name; i++) {
1414 int j;
1415 if (strcmp(cmds[i].name, cmd))
1416 continue;
1417 if (cmds[i].handler) {
1418 argc = split_args(buf, &argv, "\n");
1419 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1420 ret = cmds[i].handler(clifd, argc, argv);
1421 goto out;
1422 }
1423 for (j = 0; p[j]; j++)
1424 if (p[j] == '\n')
1425 p[j] = ' ';
1426 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
1427 ret = cmds[i].line_handler(clifd, p);
1428 goto out;
1429 }
1430 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1431 out:
1432 free(cmd);
1433 free(buf);
1434 free(argv);
1435 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1436 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1437 client_write(clifd, tmp);
1438 free(tmp);
1439 close(clifd);
1440 }
1441 return ret;
1442 }
1443
1444 static int audiod_get_socket(void)
1445 {
1446 struct sockaddr_un unix_addr;
1447 int fd;
1448
1449 if (conf.socket_given)
1450 socket_name = para_strdup(conf.socket_arg);
1451 else {
1452 char *hn = para_hostname();
1453 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1454 hn);
1455 free(hn);
1456 }
1457 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
1458 if (conf.force_given)
1459 unlink(socket_name);
1460 fd = create_pf_socket(socket_name, &unix_addr,
1461 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1462 if (fd < 0) {
1463 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1464 exit(EXIT_FAILURE); /* do not unlink socket */
1465 }
1466 if (listen(fd , 5) < 0) {
1467 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1468 exit(EXIT_FAILURE); /* do not unlink socket */
1469 }
1470 add_close_on_fork_list(fd);
1471 return fd;
1472 }
1473
1474 static int open_stat_pipe(void)
1475 {
1476 int ret, fd[3] = {-1, 1, 0};
1477 pid_t pid;
1478 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1479 if (ret >= 0) {
1480 ret = fd[1];
1481 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1482 add_close_on_fork_list(ret);
1483 } else
1484 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1485 return ret;
1486 }
1487
1488 void signal_event_handler(struct task *t)
1489 {
1490 struct signal_task *st = t->private_data;
1491 handle_signal(st->signum);
1492 }
1493
1494 void signal_pre_select(struct sched *s, struct task *t)
1495 {
1496 struct signal_task *st = t->private_data;
1497 t->ret = 1;
1498 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1499 }
1500
1501 void signal_post_select(struct sched *s, struct task *t)
1502 {
1503 struct signal_task *st = t->private_data;
1504 t->ret = 1;
1505 if (!FD_ISSET(st->fd, &s->rfds))
1506 return;
1507 t->ret = -E_SIGNAL_CAUGHT;
1508 st->signum = para_next_signal();
1509 }
1510
1511 void signal_setup_default(struct signal_task *st)
1512 {
1513 st->task.pre_select = signal_pre_select;
1514 st->task.post_select = signal_post_select;
1515 st->task.private_data = st;
1516 st->task.flags = 0;
1517 sprintf(st->task.status, "signal task");
1518 }
1519
1520 static void command_pre_select(struct sched *s, struct task *t)
1521 {
1522 struct command_task *ct = t->private_data;
1523 t->ret = 1;
1524 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1525
1526 }
1527
1528 static void command_post_select(struct sched *s, struct task *t)
1529 {
1530 int ret;
1531 struct command_task *ct = t->private_data;
1532
1533 t->ret = 1; /* always successful */
1534 if (audiod_status != AUDIOD_OFF)
1535 audiod_status_dump();
1536 if (!FD_ISSET(ct->fd, &s->rfds))
1537 return;
1538 ret = handle_connect(ct->fd);
1539 if (ret < 0)
1540 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1541 }
1542
1543 static void init_command_task(struct command_task *ct)
1544 {
1545 ct->task.pre_select = command_pre_select;
1546 ct->task.post_select = command_post_select;
1547 ct->task.event_handler = NULL;
1548 ct->task.private_data = ct;
1549 ct->task.flags = 0;
1550 ct->fd = audiod_get_socket(); /* doesn't return on errors */
1551 sprintf(ct->task.status, "command task");
1552 }
1553
1554 static void status_pre_select(struct sched *s, struct task *t)
1555 {
1556 struct status_task *st = t->private_data;
1557 t->ret = 1;
1558 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
1559 close_stat_pipe();
1560 if (st->fd < 0 && audiod_status != AUDIOD_OFF) {
1561 st->fd = open_stat_pipe();
1562 st->loaded = 0;
1563 st->buf[0] = '\0';
1564 }
1565 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
1566 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1567 }
1568
1569 static void status_post_select(struct sched *s, struct task *t)
1570 {
1571 struct status_task *st = t->private_data;
1572 int ret;
1573
1574 t->ret = 1;
1575 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1576 return;
1577 ret = read(st->fd, st->buf + st->loaded,
1578 STRINGSIZE - 1 - st->loaded);
1579 if (ret <= 0) {
1580 close_stat_pipe();
1581 /* avoid busy loop if server is down */
1582 while (sleep(1) > 0) /* FIXME */
1583 ; /* try again*/
1584 } else {
1585 st->buf[ret + st->loaded] = '\0';
1586 st->loaded = for_each_line(st->buf, ret + st->loaded,
1587 &check_stat_line);
1588 }
1589 }
1590
1591 static void init_status_task(struct status_task *st)
1592 {
1593 st->task.pre_select = status_pre_select;
1594 st->task.post_select = status_post_select;
1595 st->task.private_data = st;
1596 st->task.flags = 0;
1597 st->loaded = 0;
1598 st->fd = -1;
1599 st->buf[0] = '\0';
1600 sprintf(st->task.status, "status task");
1601 }
1602
1603 static void set_initial_status(void)
1604 {
1605 audiod_status = AUDIOD_ON;
1606 if (!conf.mode_given)
1607 return;
1608 if (!strcmp(conf.mode_arg, "sb")) {
1609 audiod_status = AUDIOD_STANDBY;
1610 return;
1611 }
1612 if (!strcmp(conf.mode_arg, "off")) {
1613 audiod_status = AUDIOD_OFF;
1614 return;
1615 }
1616 if (strcmp(conf.mode_arg, "on"))
1617 PARA_WARNING_LOG("%s", "invalid mode\n");
1618 }
1619
1620 int main(int argc, char *argv[])
1621 {
1622 char *cf;
1623 int ret, i;
1624 struct sched s;
1625 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1626 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1627
1628 init_sched();
1629
1630 valid_fd_012();
1631 hostname = para_hostname();
1632 cmdline_parser(argc, argv, &conf);
1633 para_drop_privileges(conf.user_arg, conf.group_arg);
1634 cf = configfile_exists();
1635 if (cf) {
1636 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1637 PARA_EMERG_LOG("%s", "parse error in config file\n");
1638 exit(EXIT_FAILURE);
1639 }
1640 }
1641 if (conf.logfile_given)
1642 logfile = open_log(conf.logfile_arg);
1643 log_welcome("para_audiod", conf.loglevel_arg);
1644 i = init_stream_io();
1645 if (i < 0) {
1646 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1647 exit(EXIT_FAILURE);
1648 }
1649 server_uptime(UPTIME_SET);
1650 set_initial_status();
1651 FOR_EACH_SLOT(i)
1652 clear_slot(i);
1653 init_grabbing();
1654 setup_signal_handling();
1655 signal_setup_default(sig_task);
1656 sig_task->task.event_handler = signal_event_handler;
1657
1658 init_status_task(stat_task);
1659 init_command_task(cmd_task);
1660 init_audiod_task(audiod_task);
1661
1662 if (conf.daemon_given)
1663 daemon_init();
1664
1665 register_task(&sig_task->task);
1666 register_task(&cmd_task->task);
1667 register_task(&stat_task->task);
1668 register_task(audiod_task);
1669 s.default_timeout.tv_sec = 0;
1670 s.default_timeout.tv_usec = 99 * 1000;
1671 ret = sched(&s);
1672
1673 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1674 return EXIT_FAILURE;
1675 }