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