more audiod improvements
[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->receiver_node)
503 s->receiver_node->eof = 1;
504 }
505 }
506
507 static int get_empty_slot(void)
508 {
509 int i;
510 struct slot_info *s;
511
512 FOR_EACH_SLOT(i) {
513 s = &slot[i];
514 if (s->format < 0) {
515 clear_slot(i);
516 return i;
517 }
518 if (s->wng || s->receiver_node || s->fc)
519 continue;
520 clear_slot(i);
521 return i;
522 }
523 return -E_NO_MORE_SLOTS;
524 }
525
526 static int decoder_running(int format)
527 {
528 int i, ret = 0;
529 struct slot_info *s;
530
531 FOR_EACH_SLOT(i) {
532 s = &slot[i];
533 if (s->format == format && s->receiver_node)
534 ret |= 1;
535 if (s->format == format && s->wng)
536 ret |= 2;
537 }
538 return ret;
539 }
540
541 static void close_stat_pipe(void)
542 {
543 int i;
544
545 if (stat_task->fd < 0)
546 return;
547 PARA_NOTICE_LOG("%s", "closing status pipe\n");
548 close(stat_task->fd);
549 del_close_on_fork_list(stat_task->fd);
550 stat_task->fd = -1;
551 kill_all_decoders();
552 for (i = 0; i < NUM_STAT_ITEMS; i++) {
553 free(stat_item_values[i]);
554 stat_item_values[i] = NULL;
555 }
556 dump_empty_status();
557 length_seconds = 0;
558 offset_seconds = 0;
559 audiod_status_dump();
560 playing = 0;
561 stat_item_values[SI_STATUS_BAR] = make_message(
562 "%s:no connection to para_server\n",
563 status_item_list[SI_STATUS_BAR]);
564 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
565 }
566
567 static void __noreturn clean_exit(int status, const char *msg)
568 {
569 PARA_EMERG_LOG("%s\n", msg);
570 if (socket_name)
571 unlink(socket_name);
572 if (stat_task->fd >= 0)
573 close_stat_pipe();
574 exit(status);
575 }
576
577 /**
578 * get the number of filters
579 *
580 * \param audio_format_num the number identifying the audio format
581 *
582 * \return the number of filters for the given audio format
583 *
584 * \sa struct filter;
585 */
586 int num_filters(int audio_format_num)
587 {
588 return afi[audio_format_num].num_filters;
589 }
590
591 static void filter_event_handler(struct task *t)
592 {
593 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
594 unregister_task(t);
595 }
596
597 static void open_filters(int slot_num)
598 {
599 struct slot_info *s = &slot[slot_num];
600 struct audio_format_info *a = &afi[s->format];
601 int nf = a->num_filters;
602 int i;
603
604 s->fc = NULL;
605 if (!nf)
606 return;
607 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
608 s->fc = para_calloc(sizeof(struct filter_chain));
609 INIT_LIST_HEAD(&s->fc->filters);
610 s->fc->inbuf = s->receiver_node->buf;
611 s->fc->in_loaded = &s->receiver_node->loaded;
612 s->fc->input_eof = &s->receiver_node->eof;
613
614 s->fc->task.pre_select = filter_pre_select;
615 s->fc->task.event_handler = filter_event_handler;
616 s->fc->task.private_data = s->fc;
617 s->fc->task.flags = 0;
618 s->fc->eof = 0;
619 sprintf(s->fc->task.status, "filter chain");
620 for (i = 0; i < nf; i++) {
621 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
622 fn->conf = a->filter_conf[i];
623 fn->fc = s->fc;
624 fn->filter = a->filters[i];
625 INIT_LIST_HEAD(&fn->callbacks);
626 list_add_tail(&fn->node, &s->fc->filters);
627 fn->filter->open(fn);
628 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
629 audio_formats[s->format], i + 1, nf,
630 fn->filter->name, slot_num);
631 s->fc->outbuf = fn->buf;
632 s->fc->out_loaded = &fn->loaded;
633 }
634 register_task(&s->fc->task);
635 // PARA_DEBUG_LOG("output loaded for filter chain %p: %p\n", s->fc,
636 // s->fc->out_loaded);
637 }
638
639 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
640 {
641 struct filter_node *fn;
642 int i, j;
643
644 FOR_EACH_SLOT(i) {
645 struct slot_info *s = &slot[i];
646 if (s->format < 0 || !s->fc)
647 continue;
648 if (slot_num >= 0 && slot_num != i)
649 continue;
650 if (format >= 0 && s->format != format)
651 continue;
652 if (num_filters(i) < filternum)
653 continue;
654 /* success */
655 j = 1;
656 list_for_each_entry(fn, &s->fc->filters, node)
657 if (filternum <= 0 || j++ == filternum)
658 break;
659 return fn;
660 }
661 return NULL;
662 }
663
664 static void wng_event_handler(struct task *t)
665 {
666 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
667 unregister_task(t);
668 }
669
670 static void open_writers(int slot_num)
671 {
672 int ret, i;
673 struct slot_info *s = &slot[slot_num];
674 struct audio_format_info *a = &afi[s->format];
675
676 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
677 if (!a->num_writers)
678 s->wng = setup_default_wng();
679 else
680 s->wng = wng_new(a->num_writers);
681 if (s->fc) {
682 s->wng->buf = s->fc->outbuf;
683 s->wng->loaded = s->fc->out_loaded;
684 s->wng->input_eof = &s->fc->eof;
685 s->fc->output_eof = &s->wng->eof;
686 } else {
687 s->wng->buf = s->receiver_node->buf;
688 s->wng->loaded = &s->receiver_node->loaded;
689 s->wng->input_eof = &s->receiver_node->eof;
690 }
691 s->wng->task.event_handler = wng_event_handler;
692 for (i = 0; i < a->num_writers; i++) {
693 s->wng->writer_nodes[i].conf = a->writer_conf[i];
694 s->wng->writer_nodes[i].writer = a->writers[i];
695 sprintf(s->wng->writer_nodes[i].task.status, "writer_node");
696 }
697 ret = wng_open(s->wng);
698 s->wstime = *now;
699 current_decoder = slot_num;
700 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
701 }
702
703 static void rn_event_handler(struct task *t)
704 {
705 struct receiver_node *rn = t->private_data;
706 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
707 unregister_task(t);
708 }
709
710 static void open_receiver(int format)
711 {
712 struct audio_format_info *a = &afi[format];
713 struct slot_info *s;
714 int ret, slot_num;
715 struct receiver_node *rn;
716
717 slot_num = get_empty_slot();
718 if (slot_num < 0)
719 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
720 s = &slot[slot_num];
721 s->format = format;
722 s->receiver_node = para_calloc(sizeof(struct receiver_node));
723 rn = s->receiver_node;
724 rn->receiver = a->receiver;
725 rn->conf = a->receiver_conf;
726 ret = a->receiver->open(s->receiver_node);
727 if (ret < 0) {
728 PARA_ERROR_LOG("failed to open receiver (%s)\n",
729 PARA_STRERROR(-ret));
730 free(s->receiver_node);
731 s->receiver_node = NULL;
732 return;
733 }
734 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
735 audio_formats[s->format], a->receiver->name, slot_num);
736 rn->task.private_data = s->receiver_node;
737 rn->task.pre_select = a->receiver->pre_select;
738 rn->task.post_select = a->receiver->post_select;
739 rn->task.event_handler = rn_event_handler;
740 rn->task.flags = 0;
741 sprintf(rn->task.status, "receiver node");
742 register_task(&rn->task);
743 }
744
745 static int is_frozen(int format)
746 {
747 struct audio_format_info *a = &afi[format];
748
749 return (tv_diff(now, &a->restart_barrier, NULL) > 0)? 0 : 1;
750 }
751
752 static void open_current_receiver(void)
753 {
754 int i;
755
756 if (!af_status)
757 return;
758 i = get_audio_format_num(af_status);
759 if (i < 0)
760 return;
761 if (decoder_running(i) || is_frozen(i))
762 return;
763 open_receiver(i);
764 }
765
766 static void compute_time_diff(const struct timeval *status_time)
767 {
768 struct timeval tmp, diff;
769 static int count;
770 int sign;
771 const struct timeval max_deviation = {0, 500 * 1000};
772 const int time_smooth = 5;
773
774 sign = tv_diff(status_time, now, &diff);
775 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
776 // sign, sa_time_diff_sign);
777 if (!count) {
778 sa_time_diff_sign = sign;
779 sa_time_diff = diff;
780 count++;
781 return;
782 }
783 if (count > 5) {
784 int s = tv_diff(&diff, &sa_time_diff, &tmp);
785 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
786 PARA_WARNING_LOG("time diff jump: %lims\n",
787 s * tv2ms(&tmp));
788 }
789 count++;
790 sa_time_diff_sign = tv_convex_combination(
791 sa_time_diff_sign * time_smooth, &sa_time_diff,
792 count > 10? sign : sign * time_smooth, &diff,
793 &tmp);
794 sa_time_diff = tmp;
795 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
796 sign > 0? "+" : "-",
797 tv2ms(&diff),
798 sa_time_diff_sign ? "+" : "-",
799 tv2ms(&sa_time_diff)
800 );
801 }
802
803 static void check_stat_line(char *line)
804 {
805 int itemnum;
806 size_t ilen = 0;
807 long unsigned sec, usec;
808 char *tmp;
809
810 // PARA_INFO_LOG("line: %s\n", line);
811 if (!line)
812 return;
813 itemnum = stat_line_valid(line);
814 if (itemnum < 0) {
815 PARA_WARNING_LOG("invalid status line: %s\n", line);
816 return;
817 }
818 tmp = make_message("%s\n", line);
819 stat_client_write(tmp, itemnum);
820 free(tmp);
821 free(stat_item_values[itemnum]);
822 stat_item_values[itemnum] = para_strdup(line);
823 ilen = strlen(status_item_list[itemnum]);
824 switch (itemnum) {
825 case SI_STATUS:
826 playing = strstr(line, "playing")? 1 : 0;
827 break;
828 case SI_FORMAT:
829 free(af_status);
830 af_status = para_strdup(line + ilen + 1);
831 break;
832 case SI_OFFSET:
833 offset_seconds = atoi(line + ilen + 1);
834 break;
835 case SI_LENGTH:
836 length_seconds = atoi(line + ilen + 1);
837 break;
838 case SI_STREAM_START:
839 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
840 server_stream_start.tv_sec = sec;
841 server_stream_start.tv_usec = usec;
842 }
843 break;
844 case SI_CURRENT_TIME:
845 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
846 struct timeval tv = {sec, usec};
847 compute_time_diff(&tv);
848 }
849 break;
850 }
851 }
852
853 static void handle_signal(int sig)
854 {
855 switch (sig) {
856 case SIGCHLD:
857 for (;;) {
858 pid_t pid = para_reap_child();
859 if (pid <= 0)
860 return;
861 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
862 }
863 case SIGINT:
864 case SIGTERM:
865 case SIGHUP:
866 PARA_EMERG_LOG("terminating on signal %d\n", sig);
867 clean_exit(EXIT_FAILURE, "caught deadly signal");
868 return;
869 }
870 }
871
872 static void try_to_close_slot(int slot_num)
873 {
874 struct slot_info *s = &slot[slot_num];
875
876 if (s->format < 0)
877 return;
878 if (s->receiver_node && !s->receiver_node->eof)
879 return;
880 if (s->fc && !s->fc->eof)
881 return;
882 if (s->wng && !s->wng->eof)
883 return;
884 PARA_INFO_LOG("closing slot %d \n", slot_num);
885 wng_close(s->wng);
886 wng_destroy(s->wng);
887 close_filters(s->fc);
888 free(s->fc);
889 close_receiver(slot_num);
890 clear_slot(slot_num);
891 }
892
893 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
894 {
895 int i;
896
897 now = &s->now;
898 if (audiod_status != AUDIOD_ON)
899 kill_all_decoders();
900 else if (playing)
901 open_current_receiver();
902 FOR_EACH_SLOT(i) {
903 struct receiver_node *rn;
904
905 try_to_close_slot(i);
906 if (slot[i].format < 0)
907 continue;
908 rn = slot[i].receiver_node;
909 if (rn && rn->loaded && !slot[i].wng) {
910 open_filters(i);
911 open_writers(i);
912 }
913 }
914 }
915
916 static void audiod_post_select(struct sched *s, __a_unused struct task *t)
917 {
918 /* only save away the current time for other users */
919 now = &s->now;
920 }
921
922 static void init_audiod_task(struct task *t)
923 {
924 t->pre_select = audiod_pre_select;
925 t->post_select = audiod_post_select;
926 t->event_handler = NULL;
927 t->private_data = t;
928 t->flags = 0;
929 sprintf(t->status, "audiod task");
930 }
931
932 static int parse_stream_command(const char *txt, char **cmd)
933 {
934 char *p = strchr(txt, ':');
935 int i;
936
937 if (!p)
938 return -E_MISSING_COLON;
939 p++;
940 FOR_EACH_AUDIO_FORMAT(i) {
941 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
942 continue;
943 *cmd = p;
944 return i;
945 }
946 return -E_UNSUPPORTED_AUDIO_FORMAT;
947 }
948
949 static int add_filter(int format, char *cmdline)
950 {
951 struct audio_format_info *a = &afi[format];
952 int filter_num, nf = a->num_filters;
953
954 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
955 if (filter_num < 0)
956 return filter_num;
957 a->filters[nf] = &filters[filter_num];
958 a->num_filters++;
959 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
960 a->filters[nf]->name);
961 return filter_num;
962 }
963
964 static int init_writers(void)
965 {
966 int i, ret, nw;
967 char *cmd;
968 struct audio_format_info *a;
969
970 init_supported_writers();
971 nw = PARA_MAX(1, conf.writer_given);
972 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
973 FOR_EACH_AUDIO_FORMAT(i) {
974 a = &afi[i];
975 a->writer_conf = para_malloc(nw * sizeof(void *));
976 a->writers = para_malloc(nw * sizeof(struct writer *));
977 a->num_writers = 0;
978 }
979 for (i = 0; i < conf.writer_given; i++) {
980 void *wconf;
981 int writer_num;
982 ret = parse_stream_command(conf.writer_arg[i], &cmd);
983 if (ret < 0)
984 goto out;
985 a = &afi[ret];
986 nw = a->num_writers;
987 wconf = check_writer_arg(cmd, &writer_num);
988 if (!wconf) {
989 ret = writer_num;
990 goto out;
991 }
992 a->writers[nw] = &writers[writer_num];
993 a->writer_conf[nw] = wconf;
994 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
995 nw, writer_names[writer_num]);
996 a->num_writers++;
997 }
998 ret = 1;
999 out:
1000 return ret;
1001 }
1002
1003 static int init_receivers(void)
1004 {
1005 int i, ret, receiver_num;
1006 char *cmd = NULL;
1007 struct audio_format_info *a;
1008
1009 for (i = 0; receivers[i].name; i++) {
1010 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1011 receivers[i].init(&receivers[i]);
1012 }
1013 for (i = 0; i < conf.receiver_given; i++) {
1014 char *arg = conf.receiver_arg[i];
1015 char *recv = strchr(arg, ':');
1016 ret = -E_MISSING_COLON;
1017 if (!recv)
1018 goto out;
1019 *recv = '\0';
1020 recv++;
1021 ret = get_audio_format_num(arg);
1022 if (ret < 0)
1023 goto out;
1024 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1025 if (!afi[ret].receiver_conf) {
1026 ret = -E_RECV_SYNTAX;
1027 goto out;
1028 }
1029 afi[ret].receiver = &receivers[receiver_num];
1030 }
1031 /* use the first available receiver with no arguments
1032 * for those audio formats for which no receiver
1033 * was specified
1034 */
1035 cmd = para_strdup(receivers[0].name);
1036 FOR_EACH_AUDIO_FORMAT(i) {
1037 a = &afi[i];
1038 if (a->receiver_conf)
1039 continue;
1040 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1041 if (!a->receiver_conf)
1042 return -E_RECV_SYNTAX;
1043 a->receiver = &receivers[receiver_num];
1044 }
1045 ret = 1;
1046 out:
1047 free(cmd);
1048 return ret;
1049 }
1050
1051 static int init_default_filters(void)
1052 {
1053 int i, ret = 1;
1054
1055 FOR_EACH_AUDIO_FORMAT(i) {
1056 struct audio_format_info *a = &afi[i];
1057 char *tmp;
1058 int j;
1059
1060 if (a->num_filters)
1061 continue; /* no default -- nothing to to */
1062 /* add "dec" to audio format name */
1063 tmp = make_message("%sdec", audio_formats[i]);
1064 for (j = 0; filters[j].name; j++)
1065 if (!strcmp(tmp, filters[j].name))
1066 break;
1067 free(tmp);
1068 ret = -E_UNSUPPORTED_FILTER;
1069 if (!filters[j].name)
1070 goto out;
1071 tmp = para_strdup(filters[j].name);
1072 ret = add_filter(i, tmp);
1073 free(tmp);
1074 if (ret < 0)
1075 goto out;
1076 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1077 filters[j].name);
1078 }
1079 out:
1080 return ret;
1081 }
1082
1083 static int init_filters(void)
1084 {
1085 int i, ret, nf;
1086
1087 filter_init(filters);
1088 nf = PARA_MAX(1, conf.filter_given);
1089 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
1090 FOR_EACH_AUDIO_FORMAT(i) {
1091 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
1092 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1093 }
1094 if (!conf.no_default_filters_given)
1095 return init_default_filters();
1096 for (i = 0; i < conf.filter_given; i++) {
1097 char *arg = conf.filter_arg[i];
1098 char *filter_name = strchr(arg, ':');
1099 ret = -E_MISSING_COLON;
1100 if (!filter_name)
1101 goto out;
1102 *filter_name = '\0';
1103 filter_name++;
1104 ret = get_audio_format_num(arg);
1105 if (ret < 0)
1106 goto out;
1107 ret = add_filter(ret, filter_name);
1108 if (ret < 0)
1109 goto out;
1110 }
1111 ret = init_default_filters(); /* use default values for the rest */
1112 out:
1113 return ret;
1114 }
1115
1116 static int init_stream_io(void)
1117 {
1118 int ret;
1119
1120 ret = init_writers();
1121 if (ret < 0)
1122 return ret;
1123 ret = init_receivers();
1124 if (ret < 0)
1125 return ret;
1126 ret = init_filters();
1127 if (ret < 0)
1128 return ret;
1129 return 1;
1130 }
1131
1132 static int dump_commands(int fd)
1133 {
1134 char *buf = para_strdup(""), *tmp = NULL;
1135 int i;
1136 ssize_t ret;
1137
1138 FOR_EACH_COMMAND(i) {
1139 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1140 cmds[i].description);
1141 free(buf);
1142 buf = tmp;
1143 }
1144 ret = client_write(fd, buf);
1145 free(buf);
1146 return ret;
1147 }
1148
1149 /*
1150 * command handlers don't close their fd on errors (ret < 0) so that
1151 * its caller can send an error message. Otherwise (ret >= 0) it's up
1152 * to each individual command to close the fd if necessary.
1153 */
1154
1155 static int com_help(int fd, int argc, char **argv)
1156 {
1157 int i, ret;
1158 char *buf;
1159 const char *dflt = "No such command. Available commands:\n";
1160
1161 if (argc < 2) {
1162 ret = dump_commands(fd);
1163 goto out;
1164 }
1165 FOR_EACH_COMMAND(i) {
1166 if (strcmp(cmds[i].name, argv[1]))
1167 continue;
1168 buf = make_message(
1169 "NAME\n\t%s -- %s\n"
1170 "SYNOPSIS\n\tpara_audioc %s\n"
1171 "DESCRIPTION\n%s\n",
1172 argv[1],
1173 cmds[i].description,
1174 cmds[i].synopsis,
1175 cmds[i].help
1176 );
1177 ret = client_write(fd, buf);
1178 free(buf);
1179 goto out;
1180 }
1181 ret = client_write(fd, dflt);
1182 if (ret > 0)
1183 ret = dump_commands(fd);
1184 out:
1185 if (ret >= 0)
1186 close(fd);
1187 return ret;
1188 }
1189
1190 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1191 {
1192 int i, ret;
1193 char *buf = NULL;
1194 long unsigned mask = ~0LU;
1195
1196 if (argc > 1) {
1197 mask = 0;
1198 for (i = 1; i < argc; i++) {
1199 ret = stat_item_valid(argv[i]);
1200 if (ret < 0)
1201 return ret;
1202 mask |= (1 << ret);
1203 }
1204 }
1205 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1206 if (mask & (1 << SI_PLAY_TIME)) {
1207 struct timeval *t = wstime();
1208 char *ts = get_time_string(t);
1209 if (ts) {
1210 ret = client_write(fd, ts);
1211 if (ret < 0)
1212 goto out;
1213 free(ts);
1214 }
1215 }
1216 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1217 char *tmp, *us = uptime_str();
1218 tmp = make_message("%s:%s\n",
1219 status_item_list[SI_AUDIOD_UPTIME], us);
1220 free(us);
1221 ret = client_write(fd, tmp);
1222 if (ret < 0)
1223 goto out;
1224 free(tmp);
1225 }
1226 if (mask & (1 << SI_AUDIOD_STATUS)) {
1227 char *s = audiod_status_string();
1228 ret = client_write(fd, s);
1229 if (ret < 0)
1230 goto out;
1231 free(s);
1232 }
1233 if (mask & (1 << SI_DECODER_FLAGS)) {
1234 char *df =decoder_flags();
1235 ret = client_write(fd, df);
1236 if (ret < 0)
1237 goto out;
1238 free(df);
1239 }
1240
1241 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1242 char *tmp, *v;
1243 if (!((1 << i) & mask))
1244 continue;
1245 v = stat_item_values[i];
1246 tmp = make_message("%s%s%s", buf? buf: "",
1247 v? v : "", v? "\n" : "");
1248 free(buf);
1249 buf = tmp;
1250 }
1251 ret = client_write(fd, buf);
1252 out:
1253 if (ret > 0)
1254 ret = stat_client_add(fd, mask);
1255 free(buf);
1256 return ret;
1257 }
1258
1259 static int com_grab(int fd, char *cmdline)
1260 {
1261 struct grab_client *gc;
1262 struct filter_node *fn;
1263 int i, err;
1264 char *msg;
1265
1266 gc = grab_client_new(fd, cmdline, &err);
1267 if (!gc)
1268 goto err_out;
1269 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1270 if (fn)
1271 activate_grab_client(gc, fn);
1272 return 1;
1273 err_out:
1274 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1275 return err;
1276 if (err == -E_GC_HELP_GIVEN) {
1277 msg = make_message("%s\n\n", grab_client_args_info_usage);
1278 for (i = 0; grab_client_args_info_help[i]; i++) {
1279 char *tmp = make_message("%s%s\n", msg,
1280 grab_client_args_info_help[i]);
1281 free(msg);
1282 msg = tmp;
1283 }
1284 } else
1285 msg = make_message("%s %s\n",
1286 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1287 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1288 err = client_write(fd, msg);
1289 free(msg);
1290 if (err < 0)
1291 return err;
1292 close(fd);
1293 return 1;
1294 }
1295
1296 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1297 {
1298 close(fd);
1299 clean_exit(EXIT_SUCCESS, "terminating on user request");
1300 }
1301
1302 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1303 {
1304 audiod_status = AUDIOD_ON;
1305 close(fd);
1306 return 1;
1307 }
1308
1309 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1310 {
1311 audiod_status = AUDIOD_OFF;
1312 close(fd);
1313 return 1;
1314 }
1315
1316 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1317 {
1318 audiod_status = AUDIOD_STANDBY;
1319 close(fd);
1320 return 1;
1321 }
1322
1323 static int com_cycle(int fd, int argc, char **argv)
1324 {
1325 switch (audiod_status) {
1326 case AUDIOD_ON:
1327 return com_sb(fd, argc, argv);
1328 break;
1329 case AUDIOD_OFF:
1330 return com_on(fd, argc, argv);
1331 break;
1332 case AUDIOD_STANDBY:
1333 return com_off(fd, argc, argv);
1334 break;
1335 }
1336 close(fd);
1337 return 1;
1338 }
1339
1340 static int check_perms(uid_t uid)
1341 {
1342 int i;
1343
1344 if (!conf.user_allow_given)
1345 return 1;
1346 for (i = 0; i < conf.user_allow_given; i++)
1347 if (uid == conf.user_allow_arg[i])
1348 return 1;
1349 return -E_UCRED_PERM;
1350 }
1351
1352 static int handle_connect(int accept_fd)
1353 {
1354 int i, argc, ret, clifd = -1;
1355 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
1356 struct sockaddr_un unix_addr;
1357
1358 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
1359 if (ret < 0)
1360 goto out;
1361 clifd = ret;
1362 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1363 if (ret < 0)
1364 goto out;
1365 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
1366 ret = check_perms(ret);
1367 if (ret < 0)
1368 goto out;
1369 ret = -E_INVALID_AUDIOD_CMD;
1370 cmd = para_strdup(buf);
1371 p = strchr(cmd, '\n');
1372 if (!p)
1373 p = "";
1374 else {
1375 *p = '\0';
1376 p++;
1377 }
1378 for (i = 0; cmds[i].name; i++) {
1379 int j;
1380 if (strcmp(cmds[i].name, cmd))
1381 continue;
1382 if (cmds[i].handler) {
1383 argc = split_args(buf, &argv, "\n");
1384 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1385 ret = cmds[i].handler(clifd, argc, argv);
1386 goto out;
1387 }
1388 for (j = 0; p[j]; j++)
1389 if (p[j] == '\n')
1390 p[j] = ' ';
1391 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
1392 ret = cmds[i].line_handler(clifd, p);
1393 goto out;
1394 }
1395 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1396 out:
1397 free(cmd);
1398 free(buf);
1399 free(argv);
1400 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1401 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1402 client_write(clifd, tmp);
1403 free(tmp);
1404 close(clifd);
1405 }
1406 return ret;
1407 }
1408
1409 static int audiod_get_socket(void)
1410 {
1411 struct sockaddr_un unix_addr;
1412 int fd;
1413
1414 if (conf.socket_given)
1415 socket_name = para_strdup(conf.socket_arg);
1416 else {
1417 char *hn = para_hostname();
1418 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1419 hn);
1420 free(hn);
1421 }
1422 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
1423 if (conf.force_given)
1424 unlink(socket_name);
1425 fd = create_pf_socket(socket_name, &unix_addr,
1426 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1427 if (fd < 0) {
1428 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1429 exit(EXIT_FAILURE); /* do not unlink socket */
1430 }
1431 if (listen(fd , 5) < 0) {
1432 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1433 exit(EXIT_FAILURE); /* do not unlink socket */
1434 }
1435 add_close_on_fork_list(fd);
1436 return fd;
1437 }
1438
1439 static int open_stat_pipe(void)
1440 {
1441 int ret, fd[3] = {-1, 1, 0};
1442 pid_t pid;
1443 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1444 if (ret >= 0) {
1445 ret = fd[1];
1446 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1447 add_close_on_fork_list(ret);
1448 } else
1449 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1450 return ret;
1451 }
1452
1453 void signal_event_handler(struct task *t)
1454 {
1455 struct signal_task *st = t->private_data;
1456 handle_signal(st->signum);
1457 }
1458
1459 void signal_pre_select(struct sched *s, struct task *t)
1460 {
1461 struct signal_task *st = t->private_data;
1462 t->ret = 1;
1463 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1464 }
1465
1466 void signal_post_select(struct sched *s, struct task *t)
1467 {
1468 struct signal_task *st = t->private_data;
1469 t->ret = 1;
1470 if (!FD_ISSET(st->fd, &s->rfds))
1471 return;
1472 t->ret = -E_SIGNAL_CAUGHT;
1473 st->signum = para_next_signal();
1474 }
1475
1476 void signal_setup_default(struct signal_task *st)
1477 {
1478 st->task.pre_select = signal_pre_select;
1479 st->task.post_select = signal_post_select;
1480 st->task.private_data = st;
1481 st->task.flags = 0;
1482 sprintf(st->task.status, "signal task");
1483 }
1484
1485 static void command_pre_select(struct sched *s, struct task *t)
1486 {
1487 struct command_task *ct = t->private_data;
1488 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1489
1490 }
1491
1492 static void command_post_select(struct sched *s, struct task *t)
1493 {
1494 int ret;
1495 struct command_task *ct = t->private_data;
1496
1497 if (audiod_status != AUDIOD_OFF)
1498 audiod_status_dump();
1499 t->ret = 1; /* always successful */
1500 if (!FD_ISSET(ct->fd, &s->rfds))
1501 return;
1502 ret = handle_connect(ct->fd);
1503 if (ret < 0)
1504 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1505 }
1506
1507 static void init_command_task(struct command_task *ct)
1508 {
1509 ct->task.pre_select = command_pre_select;
1510 ct->task.post_select = command_post_select;
1511 ct->task.event_handler = NULL;
1512 ct->task.private_data = ct;
1513 ct->task.flags = 0;
1514 ct->fd = audiod_get_socket(); /* doesn't return on errors */
1515 sprintf(ct->task.status, "command task");
1516 }
1517
1518 static void status_pre_select(struct sched *s, struct task *t)
1519 {
1520 struct status_task *st = t->private_data;
1521 t->ret = 1;
1522 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
1523 close_stat_pipe();
1524 if (st->fd < 0 && audiod_status != AUDIOD_OFF) {
1525 st->fd = open_stat_pipe();
1526 st->loaded = 0;
1527 st->buf[0] = '\0';
1528 }
1529 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
1530 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1531 }
1532
1533 static void status_post_select(struct sched *s, struct task *t)
1534 {
1535 struct status_task *st = t->private_data;
1536 int ret;
1537
1538 t->ret = 1;
1539 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1540 return;
1541 ret = read(st->fd, st->buf + st->loaded,
1542 STRINGSIZE - 1 - st->loaded);
1543 if (ret <= 0) {
1544 close_stat_pipe();
1545 /* avoid busy loop if server is down */
1546 while (sleep(1) > 0) /* FIXME */
1547 ; /* try again*/
1548 } else {
1549 st->buf[ret + st->loaded] = '\0';
1550 st->loaded = for_each_line(st->buf, ret + st->loaded,
1551 &check_stat_line);
1552 }
1553 }
1554
1555 static void init_status_task(struct status_task *st)
1556 {
1557 st->task.pre_select = status_pre_select;
1558 st->task.post_select = status_post_select;
1559 st->task.private_data = st;
1560 st->task.flags = 0;
1561 st->loaded = 0;
1562 st->fd = -1;
1563 st->buf[0] = '\0';
1564 sprintf(st->task.status, "status task");
1565 }
1566
1567 static void set_initial_status(void)
1568 {
1569 audiod_status = AUDIOD_ON;
1570 if (!conf.mode_given)
1571 return;
1572 if (!strcmp(conf.mode_arg, "sb")) {
1573 audiod_status = AUDIOD_STANDBY;
1574 return;
1575 }
1576 if (!strcmp(conf.mode_arg, "off")) {
1577 audiod_status = AUDIOD_OFF;
1578 return;
1579 }
1580 if (strcmp(conf.mode_arg, "on"))
1581 PARA_WARNING_LOG("%s", "invalid mode\n");
1582 }
1583
1584 int main(int argc, char *argv[])
1585 {
1586 char *cf;
1587 int ret, i;
1588 struct sched s;
1589 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1590 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1591
1592 init_sched();
1593
1594 valid_fd_012();
1595 hostname = para_hostname();
1596 cmdline_parser(argc, argv, &conf);
1597 para_drop_privileges(conf.user_arg, conf.group_arg);
1598 cf = configfile_exists();
1599 if (cf) {
1600 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1601 PARA_EMERG_LOG("%s", "parse error in config file\n");
1602 exit(EXIT_FAILURE);
1603 }
1604 }
1605 if (conf.logfile_given)
1606 logfile = open_log(conf.logfile_arg);
1607 log_welcome("para_audiod", conf.loglevel_arg);
1608 i = init_stream_io();
1609 if (i < 0) {
1610 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1611 exit(EXIT_FAILURE);
1612 }
1613 server_uptime(UPTIME_SET);
1614 set_initial_status();
1615 FOR_EACH_SLOT(i)
1616 clear_slot(i);
1617 init_grabbing();
1618 setup_signal_handling();
1619 signal_setup_default(sig_task);
1620 sig_task->task.event_handler = signal_event_handler;
1621
1622 init_status_task(stat_task);
1623 init_command_task(cmd_task);
1624 init_audiod_task(audiod_task);
1625
1626 if (conf.daemon_given)
1627 daemon_init();
1628
1629 register_task(&sig_task->task);
1630 register_task(&cmd_task->task);
1631 register_task(&stat_task->task);
1632 register_task(audiod_task);
1633 s.default_timeout.tv_sec = 0;
1634 s.default_timeout.tv_usec = 99 * 1000;
1635 ret = sched(&s);
1636
1637 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1638 return EXIT_FAILURE;
1639 }