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