audiod: clean up wng_event_handler()
[paraslash.git] / audiod.c
1 /*
2 * Copyright (C) 2005-2006 Andre Noll <noll@mathematik.tu-darmstadt.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file audiod.c the paraslash's audio daemon */
20
21 #include "para.h"
22
23 #include "audiod.cmdline.h"
24 #include "list.h"
25 #include "close_on_fork.h"
26 #include "sched.h"
27 #include "recv.h"
28 #include "filter.h"
29 #include "grab_client.cmdline.h"
30 #include "grab_client.h"
31
32 #include "error.h"
33 #include "audiod.h"
34 #include "net.h"
35 #include "daemon.h"
36 #include "string.h"
37 #include "fd.h"
38 #include "write.h"
39 #include "write_common.h"
40
41 /** define the array of error lists needed by para_audiod */
42 INIT_AUDIOD_ERRLISTS;
43 /** define the array containing all supported audio formats */
44 DEFINE_AUDIO_FORMAT_ARRAY;
45
46 /**
47 * the possible modes of operation
48 *
49 * - off: disconnect from para_server
50 * - on: receive status information from para_server and play the audio stream
51 * - sb: only receive status information but not the audio stream
52 */
53 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
54
55 /** defines how to handle one supported audio format */
56 struct audio_format_info {
57 /** pointer to the receiver for this audio format */
58 struct receiver *receiver;
59 /** the receiver configuration */
60 void *receiver_conf;
61 /** the number of filters that should be activated for this audio format */
62 unsigned int num_filters;
63 /** pointer to the array of filters to be activated */
64 struct filter **filters;
65 /** pointer to the array of filter configurations */
66 void **filter_conf;
67 /** the number of filters that should be activated for this audio format */
68 unsigned int num_writers;
69 /** pointer to the array of writers to be activated */
70 struct writer **writers;
71 /** pointer to the array of writer configurations */
72 void **writer_conf;
73 /** do not start receiver/filters/writer before this time */
74 struct timeval restart_barrier;
75 };
76
77 /**
78 * describes one instance of a receiver-filter-writer chain
79 *
80 * \sa receier_node, receiver, filter, filter_node, filter_chain, writer,
81 * writer_node, writer_node_group.
82 */
83 struct slot_info {
84 /** number of the audio format in this slot */
85 int format;
86 /** time of the last successful read from the receiver */
87 struct timeval rtime;
88 /** time the last write to the write fd happend */
89 struct timeval wtime;
90 /** writer start time */
91 struct timeval wstime;
92 /** the receiver info associated with this slot */
93 struct receiver_node *receiver_node;
94 /** the active filter chain */
95 struct filter_chain *fc;
96 /** the active writer node group */
97 struct writer_node_group *wng;
98 };
99 static struct slot_info slot[MAX_STREAM_SLOTS];
100
101 extern const char *status_item_list[NUM_STAT_ITEMS];
102
103 static struct gengetopt_args_info conf;
104 static struct timeval server_stream_start, sa_time_diff;
105 static int playing, current_decoder = -1,
106 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
107 sa_time_diff_sign = 1;
108 static char *af_status, /* the audio format announced in server status */
109 *socket_name, *hostname;
110 static char *stat_item_values[NUM_STAT_ITEMS];
111 static FILE *logfile;
112 static const struct timeval restart_delay = {0, 300 * 1000};
113 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
114 static struct timeval *now;
115
116 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
117
118 struct command_task {
119 int fd;
120 struct task task;
121 };
122 static struct command_task command_task_struct, *cmd_task = &command_task_struct;
123
124 struct status_task {
125 int fd;
126 struct task task;
127 char buf[STRINGSIZE];
128 unsigned loaded;
129 };
130 static struct status_task status_task_struct, *stat_task = &status_task_struct;
131
132 struct audiod_task {
133 struct task task;
134 };
135 static struct audiod_task audiod_task_struct, *at = &audiod_task_struct;
136
137 struct signal_task {
138 int fd;
139 int signum;
140 struct task task;
141 };
142
143
144 /** defines one command of para_audiod */
145 struct audiod_command {
146 /** the name of the command */
147 const char *name;
148 /** pointer to the function that handles the command */
149 int (*handler)(int, int, char**);
150 int (*line_handler)(int, char*);
151 /** one-line description of the command */
152 const char *description;
153 /** summary of the command line options */
154 const char *synopsis;
155 /** the long help text */
156 const char *help;
157 };
158 static int com_grab(int, char *);
159 static int com_cycle(int, int, char **);
160 static int com_help(int, int, char **);
161 static int com_off(int, int, char **);
162 static int com_on(int, int, char **);
163 static int com_sb(int, int, char **);
164 static int com_stat(int, int, char **);
165 static int com_term(int, int, char **);
166 static struct audiod_command cmds[] = {
167 {
168 .name = "cycle",
169 .handler = com_cycle,
170 .description = "switch to next mode",
171 .synopsis = "cycle",
172 .help =
173
174 "on -> standby -> off -> on\n"
175
176 },
177 {
178 .name = "grab",
179 .line_handler = com_grab,
180 .description = "grab the audio stream",
181 .synopsis = "-- grab [grab_options]",
182 .help =
183
184 "grab ('splice') the audio stream at any position in the filter \n"
185 "chain and send that data back to the client. Try\n"
186 "\t para_audioc -- grab -h\n"
187 "for the list of available options.\n"
188 },
189
190 {
191 .name = "help",
192 .handler = com_help,
193 .description = "display command list or help for given command",
194 .synopsis = "help [command]",
195 .help =
196
197 "When I was younger, so much younger than today, I never needed\n"
198 "anybody's help in any way. But now these days are gone, I'm not so\n"
199 "self assured. Now I find I've changed my mind and opened up the doors.\n"
200 "\n"
201 " -- Beatles: Help\n"
202
203 },
204 {
205 .name = "off",
206 .handler = com_off,
207 .description = "deactivate para_audiod",
208 .synopsis = "off",
209 .help =
210
211 "Close connection to para_server and stop all decoders.\n"
212
213 },
214 {
215 .name = "on",
216 .handler = com_on,
217 .description = "activate para_audiod",
218 .synopsis = "on",
219 .help =
220
221 "Establish connection to para_server, retrieve para_server's current\n"
222 "status. If playing, start corresponding decoder. Otherwise stop\n"
223 "all decoders.\n"
224
225 },
226 {
227 .name = "sb",
228 .handler = com_sb,
229 .description = "enter standby mode",
230 .synopsis = "sb",
231 .help =
232
233 "Stop all decoders but leave connection to para_server open.\n"
234
235 },
236 {
237 .name = "stat",
238 .handler = com_stat,
239 .description = "print status information",
240 .synopsis = "stat [item1 ...]",
241 .help =
242
243 "Dump given status items (all if none given) to stdout.\n"
244
245 },
246 {
247 .name = "term",
248 .handler = com_term,
249 .description = "terminate audiod",
250 .synopsis = "term",
251 .help =
252
253 "Stop all decoders, shut down connection to para_server and exit.\n"
254
255 },
256 {
257 .name = NULL,
258 }
259 };
260
261 /** iterate over all slots */
262 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
263 /** iterate over all supported audio formats */
264 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
265 /** iterate over the array of all audiod commands */
266 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
267
268 /**
269 * get the audio format number
270 * \param name the name of the audio format
271 *
272 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
273 * \a name is not a supported audio format.
274 */
275 int get_audio_format_num(char *name)
276 {
277 int i;
278 FOR_EACH_AUDIO_FORMAT(i)
279 if (!strcmp(name, audio_formats[i]))
280 return i;
281 return -E_UNSUPPORTED_AUDIO_FORMAT;
282 }
283
284 /*
285 * log function. first argument is loglevel.
286 */
287 void para_log(int ll, const char* fmt,...)
288 {
289 va_list argp;
290 FILE *outfd;
291 struct tm *tm;
292 time_t t1;
293 char str[MAXLINE] = "";
294
295 if (ll < conf.loglevel_arg)
296 return;
297 outfd = logfile? logfile : stderr;
298 time(&t1);
299 tm = localtime(&t1);
300 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
301 fprintf(outfd, "%s %s ", str, hostname);
302 if (conf.loglevel_arg <= INFO)
303 fprintf(outfd, "%i ", ll);
304 va_start(argp, fmt);
305 vfprintf(outfd, fmt, argp);
306 va_end(argp);
307 }
308
309 static int client_write(int fd, const char *buf)
310 {
311 size_t len = strlen(buf);
312 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
313 }
314
315 static char *get_time_string(struct timeval *newest_stime)
316 {
317 struct timeval diff, adj_stream_start, tmp;
318 int total = 0, use_server_time = 1;
319
320 if (!playing) {
321 if (length_seconds)
322 return NULL;
323 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
324 }
325 if (audiod_status == AUDIOD_OFF)
326 goto out;
327 if (sa_time_diff_sign > 0)
328 tv_diff(&server_stream_start, &sa_time_diff,
329 &adj_stream_start);
330 else
331 tv_add(&server_stream_start, &sa_time_diff,
332 &adj_stream_start);
333 tmp = adj_stream_start;
334 if (newest_stime && audiod_status == AUDIOD_ON) {
335 tv_diff(newest_stime, &adj_stream_start, &diff);
336 if (tv2ms(&diff) < 5000) {
337 tmp = *newest_stime;
338 use_server_time = 0;
339 }
340 }
341 tv_diff(now, &tmp, &diff);
342 total = diff.tv_sec + offset_seconds;
343 if (total > length_seconds)
344 total = length_seconds;
345 if (total < 0)
346 total = 0;
347 out:
348 return make_message(
349 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
350 status_item_list[SI_PLAY_TIME],
351 use_server_time? "~" : "",
352 total / 60,
353 total % 60,
354 (length_seconds - total) / 60,
355 (length_seconds - total) % 60,
356 length_seconds? (total * 100 + length_seconds / 2) /
357 length_seconds : 0,
358 length_seconds / 60,
359 length_seconds % 60
360 );
361 }
362
363 __malloc static char *audiod_status_string(void)
364 {
365 const char *status = (audiod_status == AUDIOD_ON)?
366 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
367 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
368 }
369
370 static struct timeval *wstime(void)
371 {
372 int i;
373 struct timeval *max = NULL;
374 FOR_EACH_SLOT(i) {
375 struct slot_info *s = &slot[i];
376 if (!s->wng)
377 continue;
378 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
379 continue;
380 max = &s->wstime;
381 }
382 return max;
383 }
384 __malloc static char *decoder_flags(void)
385 {
386 int i;
387 char decoder_flags[MAX_STREAM_SLOTS + 1];
388
389 FOR_EACH_SLOT(i) {
390 struct slot_info *s = &slot[i];
391 char flag = '0';
392 if (s->receiver_node)
393 flag += 1;
394 if (s->wng)
395 flag += 2;
396 decoder_flags[i] = flag;
397 }
398 decoder_flags[MAX_STREAM_SLOTS] = '\0';
399 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
400 decoder_flags);
401 }
402
403 static char *configfile_exists(void)
404 {
405 static char *config_file;
406
407 if (!config_file) {
408 char *home = para_homedir();
409 config_file = make_message("%s/.paraslash/audiod.conf", home);
410 free(home);
411 }
412 return file_exists(config_file)? config_file : NULL;
413 }
414
415 static void setup_signal_handling(void)
416 {
417 sig_task->fd = para_signal_init();
418 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
419 para_install_sighandler(SIGINT);
420 para_install_sighandler(SIGTERM);
421 para_install_sighandler(SIGCHLD);
422 para_install_sighandler(SIGHUP);
423 signal(SIGPIPE, SIG_IGN);
424 }
425
426 static void audiod_status_dump(void)
427 {
428 static char *p_ts, *p_us, *p_as, *p_df;
429 struct timeval *t = wstime();
430 char *us, *tmp = get_time_string(t);
431
432 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
433 stat_client_write(tmp, SI_PLAY_TIME);
434 free(p_ts);
435 p_ts = tmp;
436
437 us = uptime_str();
438 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
439 free(us);
440 if (!p_us || strcmp(p_us, tmp))
441 stat_client_write(tmp, SI_AUDIOD_UPTIME);
442 free(p_us);
443 p_us = tmp;
444
445 tmp = audiod_status_string();
446 if (!p_as || strcmp(p_as, tmp))
447 stat_client_write(tmp, SI_AUDIOD_STATUS);
448 free(p_as);
449 p_as = tmp;
450
451 tmp = decoder_flags();
452 if (!p_df || strcmp(p_df, tmp))
453 stat_client_write(tmp, SI_DECODER_FLAGS);
454 free(p_df);
455 p_df = tmp;
456 }
457
458 static void clear_slot(int slot_num)
459 {
460 struct slot_info *s = &slot[slot_num];
461
462 PARA_INFO_LOG("clearing slot %d\n", slot_num);
463 memset(s, 0, sizeof(struct slot_info));
464 s->format = -1;
465 }
466
467 static void close_receiver(int slot_num)
468 {
469 struct slot_info *s = &slot[slot_num];
470 struct audio_format_info *a;
471
472 if (s->format < 0 || !s->receiver_node)
473 return;
474 a = &afi[s->format];
475 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
476 audio_formats[s->format] , slot_num, s->receiver_node->eof);
477 if (!s->receiver_node->eof)
478 unregister_task(&s->receiver_node->task);
479 a->receiver->close(s->receiver_node);
480 free(s->receiver_node);
481 s->receiver_node = NULL;
482 /* set restart barrier */
483 tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
484 }
485
486 static void kill_all_decoders(void)
487 {
488 int i;
489
490 FOR_EACH_SLOT(i) {
491 struct slot_info *s = &slot[i];
492 if (s->receiver_node)
493 s->receiver_node->eof = 1;
494 }
495 }
496
497 static int get_empty_slot(void)
498 {
499 int i;
500 struct slot_info *s;
501
502 FOR_EACH_SLOT(i) {
503 s = &slot[i];
504 if (s->format < 0) {
505 clear_slot(i);
506 return i;
507 }
508 if (s->wng || s->receiver_node || s->fc)
509 continue;
510 clear_slot(i);
511 return i;
512 }
513 return -E_NO_MORE_SLOTS;
514 }
515
516 static int decoder_running(int format)
517 {
518 int i, ret = 0;
519 struct slot_info *s;
520
521 FOR_EACH_SLOT(i) {
522 s = &slot[i];
523 if (s->format == format && s->receiver_node)
524 ret |= 1;
525 if (s->format == format && s->wng)
526 ret |= 2;
527 }
528 return ret;
529 }
530
531 static void close_stat_pipe(void)
532 {
533 int i;
534
535 if (stat_task->fd < 0)
536 return;
537 PARA_NOTICE_LOG("%s", "closing status pipe\n");
538 close(stat_task->fd);
539 del_close_on_fork_list(stat_task->fd);
540 stat_task->fd = -1;
541 kill_all_decoders();
542 for (i = 0; i < NUM_STAT_ITEMS; i++) {
543 free(stat_item_values[i]);
544 stat_item_values[i] = NULL;
545 }
546 dump_empty_status();
547 length_seconds = 0;
548 offset_seconds = 0;
549 audiod_status_dump();
550 playing = 0;
551 stat_item_values[SI_STATUS_BAR] = make_message(
552 "%s:no connection to para_server\n",
553 status_item_list[SI_STATUS_BAR]);
554 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
555 }
556
557 static void __noreturn clean_exit(int status, const char *msg)
558 {
559 PARA_EMERG_LOG("%s\n", msg);
560 kill_all_decoders();
561 if (socket_name)
562 unlink(socket_name);
563 if (stat_task->fd >= 0)
564 close_stat_pipe();
565 exit(status);
566 }
567
568 /**
569 * get the number of filters
570 *
571 * \param audio_format_num the number identifying the audio format
572 *
573 * \return the number of filters for the given audio format
574 *
575 * \sa struct filter;
576 */
577 int num_filters(int audio_format_num)
578 {
579 return afi[audio_format_num].num_filters;
580 }
581
582 static void filter_event_handler(struct task *t)
583 {
584 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
585 unregister_task(t);
586 }
587
588 static void open_filters(int slot_num)
589 {
590 struct slot_info *s = &slot[slot_num];
591 struct audio_format_info *a = &afi[s->format];
592 int nf = a->num_filters;
593 int i;
594
595 s->fc = NULL;
596 if (!nf)
597 return;
598 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
599 s->fc = para_calloc(sizeof(struct filter_chain));
600 INIT_LIST_HEAD(&s->fc->filters);
601 s->fc->inbuf = s->receiver_node->buf;
602 s->fc->in_loaded = &s->receiver_node->loaded;
603 s->fc->input_eof = &s->receiver_node->eof;
604
605 s->fc->task.pre_select = filter_pre_select;
606 s->fc->task.event_handler = filter_event_handler;
607 s->fc->task.private_data = s->fc;
608 s->fc->task.flags = 0;
609 s->fc->eof = 0;
610 sprintf(s->fc->task.status, "filter chain");
611 for (i = 0; i < nf; i++) {
612 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
613 fn->conf = a->filter_conf[i];
614 fn->fc = s->fc;
615 fn->filter = a->filters[i];
616 INIT_LIST_HEAD(&fn->callbacks);
617 list_add_tail(&fn->node, &s->fc->filters);
618 fn->filter->open(fn);
619 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
620 audio_formats[s->format], i + 1, nf,
621 fn->filter->name, slot_num);
622 s->fc->outbuf = fn->buf;
623 s->fc->out_loaded = &fn->loaded;
624 }
625 register_task(&s->fc->task);
626 // PARA_DEBUG_LOG("output loaded for filter chain %p: %p\n", s->fc,
627 // s->fc->out_loaded);
628 }
629
630 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
631 {
632 struct filter_node *fn;
633 int i, j;
634
635 FOR_EACH_SLOT(i) {
636 struct slot_info *s = &slot[i];
637 if (s->format < 0 || !s->fc)
638 continue;
639 if (slot_num >= 0 && slot_num != i)
640 continue;
641 if (format >= 0 && s->format != format)
642 continue;
643 if (num_filters(i) < filternum)
644 continue;
645 /* success */
646 j = 1;
647 list_for_each_entry(fn, &s->fc->filters, node)
648 if (filternum <= 0 || j++ == filternum)
649 break;
650 return fn;
651 }
652 return NULL;
653 }
654
655 static void wng_event_handler(struct task *t)
656 {
657 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
658 unregister_task(t);
659 }
660
661 static void open_writers(int slot_num)
662 {
663 int ret, i;
664 struct slot_info *s = &slot[slot_num];
665 struct audio_format_info *a = &afi[s->format];
666
667 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
668 if (!a->num_writers)
669 s->wng = setup_default_wng();
670 else
671 s->wng = wng_new(a->num_writers);
672 if (s->fc) {
673 s->wng->buf = s->fc->outbuf;
674 s->wng->loaded = s->fc->out_loaded;
675 s->wng->input_eof = &s->fc->eof;
676 s->fc->output_eof = &s->wng->eof;
677 } else {
678 s->wng->buf = s->receiver_node->buf;
679 s->wng->loaded = &s->receiver_node->loaded;
680 s->wng->input_eof = &s->receiver_node->eof;
681 }
682 s->wng->task.event_handler = wng_event_handler;
683 for (i = 0; i < a->num_writers; i++) {
684 s->wng->writer_nodes[i].conf = a->writer_conf[i];
685 s->wng->writer_nodes[i].writer = a->writers[i];
686 sprintf(s->wng->writer_nodes[i].task.status, "writer_node");
687 }
688 ret = wng_open(s->wng);
689 s->wstime = *now;
690 current_decoder = slot_num;
691 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
692 }
693
694 static void rn_event_handler(struct task *t)
695 {
696 // struct receiver_node *rn = t->private_data;
697 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
698 unregister_task(t);
699 }
700
701 static void open_receiver(int format)
702 {
703 struct audio_format_info *a = &afi[format];
704 struct slot_info *s;
705 int ret, slot_num;
706 struct receiver_node *rn;
707
708 slot_num = get_empty_slot();
709 if (slot_num < 0)
710 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
711 s = &slot[slot_num];
712 s->format = format;
713 s->rtime = *now;
714 s->wtime = s->rtime;
715 s->receiver_node = para_calloc(sizeof(struct receiver_node));
716 rn = s->receiver_node;
717 rn->receiver = a->receiver;
718 rn->conf = a->receiver_conf;
719 ret = a->receiver->open(s->receiver_node);
720 if (ret < 0) {
721 PARA_ERROR_LOG("failed to open receiver (%s)\n",
722 PARA_STRERROR(-ret));
723 free(s->receiver_node);
724 s->receiver_node = NULL;
725 return;
726 }
727 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
728 audio_formats[s->format], a->receiver->name, slot_num);
729 rn->task.private_data = s->receiver_node;
730 rn->task.pre_select = a->receiver->pre_select;
731 rn->task.post_select = a->receiver->post_select;
732 rn->task.event_handler = rn_event_handler;
733 rn->task.flags = 0;
734 sprintf(rn->task.status, "receiver node");
735 register_task(&rn->task);
736 }
737
738 static int is_frozen(int format)
739 {
740 struct audio_format_info *a = &afi[format];
741
742 return (tv_diff(now, &a->restart_barrier, NULL) > 0)? 0 : 1;
743 }
744
745 static void open_current_receiver(void)
746 {
747 int i;
748
749 if (!af_status)
750 return;
751 i = get_audio_format_num(af_status);
752 if (i < 0)
753 return;
754 if (decoder_running(i) || is_frozen(i))
755 return;
756 open_receiver(i);
757 }
758
759 static void compute_time_diff(const struct timeval *status_time)
760 {
761 struct timeval tmp, diff;
762 static int count;
763 int sign;
764 const struct timeval max_deviation = {0, 500 * 1000};
765 const int time_smooth = 5;
766
767 sign = tv_diff(status_time, now, &diff);
768 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
769 // sign, sa_time_diff_sign);
770 if (!count) {
771 sa_time_diff_sign = sign;
772 sa_time_diff = diff;
773 count++;
774 return;
775 }
776 if (count > 5) {
777 int s = tv_diff(&diff, &sa_time_diff, &tmp);
778 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
779 PARA_WARNING_LOG("time diff jump: %lims\n",
780 s * tv2ms(&tmp));
781 }
782 count++;
783 sa_time_diff_sign = tv_convex_combination(
784 sa_time_diff_sign * time_smooth, &sa_time_diff,
785 count > 10? sign : sign * time_smooth, &diff,
786 &tmp);
787 sa_time_diff = tmp;
788 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
789 sign > 0? "+" : "-",
790 tv2ms(&diff),
791 sa_time_diff_sign ? "+" : "-",
792 tv2ms(&sa_time_diff)
793 );
794 }
795
796 static void check_stat_line(char *line)
797 {
798 int itemnum;
799 size_t ilen = 0;
800 long unsigned sec, usec;
801 char *tmp;
802
803 // PARA_INFO_LOG("line: %s\n", line);
804 if (!line)
805 return;
806 itemnum = stat_line_valid(line);
807 if (itemnum < 0) {
808 PARA_WARNING_LOG("invalid status line: %s\n", line);
809 return;
810 }
811 tmp = make_message("%s\n", line);
812 stat_client_write(tmp, itemnum);
813 free(tmp);
814 free(stat_item_values[itemnum]);
815 stat_item_values[itemnum] = para_strdup(line);
816 ilen = strlen(status_item_list[itemnum]);
817 switch (itemnum) {
818 case SI_STATUS:
819 playing = strstr(line, "playing")? 1 : 0;
820 break;
821 case SI_FORMAT:
822 free(af_status);
823 af_status = para_strdup(line + ilen + 1);
824 break;
825 case SI_OFFSET:
826 offset_seconds = atoi(line + ilen + 1);
827 break;
828 case SI_LENGTH:
829 length_seconds = atoi(line + ilen + 1);
830 break;
831 case SI_STREAM_START:
832 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
833 server_stream_start.tv_sec = sec;
834 server_stream_start.tv_usec = usec;
835 }
836 break;
837 case SI_CURRENT_TIME:
838 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
839 struct timeval tv = {sec, usec};
840 compute_time_diff(&tv);
841 }
842 break;
843 }
844 }
845
846 static void handle_signal(int sig)
847 {
848 switch (sig) {
849 case SIGCHLD:
850 for (;;) {
851 pid_t pid = para_reap_child();
852 if (pid <= 0)
853 return;
854 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
855 }
856 case SIGINT:
857 case SIGTERM:
858 case SIGHUP:
859 PARA_EMERG_LOG("terminating on signal %d\n", sig);
860 clean_exit(EXIT_FAILURE, "caught deadly signal");
861 return;
862 }
863 }
864
865 static void check_timeouts(void)
866 {
867
868 int slot_num, timeout = conf.stream_timeout_arg;
869
870 FOR_EACH_SLOT(slot_num) {
871 struct slot_info *s = &slot[slot_num];
872 if (s->format < 0)
873 continue;
874 /* check read time */
875 if (s->receiver_node &&
876 now->tv_sec > s->rtime.tv_sec + timeout) {
877 PARA_INFO_LOG("%s stream (slot %d) not ready\n",
878 audio_formats[s->format], slot_num);
879 s->receiver_node->eof = 1;
880 }
881 }
882 }
883
884 static void try_to_close_slot(int slot_num)
885 {
886 struct slot_info *s = &slot[slot_num];
887
888 if (s->format < 0)
889 return;
890 if (s->receiver_node && !s->receiver_node->eof)
891 return;
892 if (s->fc && !s->fc->eof)
893 return;
894 if (s->wng && !s->wng->eof)
895 return;
896 PARA_INFO_LOG("closing slot %d \n", slot_num);
897 wng_close(s->wng);
898 wng_destroy(s->wng);
899 close_filters(s->fc);
900 free(s->fc);
901 close_receiver(slot_num);
902 clear_slot(slot_num);
903 }
904
905 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
906 {
907 int i;
908
909 now = &s->now;
910 if (audiod_status != AUDIOD_ON)
911 kill_all_decoders();
912 else if (playing)
913 open_current_receiver();
914 check_timeouts();
915 FOR_EACH_SLOT(i) {
916 struct receiver_node *rn;
917
918 try_to_close_slot(i);
919 if (slot[i].format < 0)
920 continue;
921 rn = slot[i].receiver_node;
922 if (rn && rn->loaded && !slot[i].wng) {
923 open_filters(i);
924 open_writers(i);
925 }
926 }
927 }
928
929 static void audiod_post_select(struct sched *s, __a_unused struct task *t)
930 {
931 int i;
932
933 now = &s->now;
934 FOR_EACH_SLOT(i) {
935 struct receiver_node *rn = slot[i].receiver_node;
936
937 if (rn && rn->loaded)
938 slot[i].rtime = *now;
939 }
940 }
941
942 static void init_audiod_task(struct audiod_task *at)
943 {
944 at->task.pre_select = audiod_pre_select;
945 at->task.post_select = audiod_post_select;
946 at->task.private_data = at;
947 at->task.flags = 0;
948 sprintf(at->task.status, "audiod task");
949 }
950
951 static int parse_stream_command(const char *txt, char **cmd)
952 {
953 char *p = strchr(txt, ':');
954 int i;
955
956 if (!p)
957 return -E_MISSING_COLON;
958 p++;
959 FOR_EACH_AUDIO_FORMAT(i) {
960 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
961 continue;
962 *cmd = p;
963 return i;
964 }
965 return -E_UNSUPPORTED_AUDIO_FORMAT;
966 }
967
968 static int add_filter(int format, char *cmdline)
969 {
970 struct audio_format_info *a = &afi[format];
971 int filter_num, nf = a->num_filters;
972
973 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
974 if (filter_num < 0)
975 return filter_num;
976 a->filters[nf] = &filters[filter_num];
977 a->num_filters++;
978 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
979 a->filters[nf]->name);
980 return filter_num;
981 }
982
983 static int init_writers(void)
984 {
985 int i, ret, nw;
986 char *cmd;
987 struct audio_format_info *a;
988
989 init_supported_writers();
990 nw = PARA_MAX(1, conf.writer_given);
991 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
992 FOR_EACH_AUDIO_FORMAT(i) {
993 a = &afi[i];
994 a->writer_conf = para_malloc(nw * sizeof(void *));
995 a->writers = para_malloc(nw * sizeof(struct writer *));
996 a->num_writers = 0;
997 }
998 for (i = 0; i < conf.writer_given; i++) {
999 void *wconf;
1000 int writer_num;
1001 ret = parse_stream_command(conf.writer_arg[i], &cmd);
1002 if (ret < 0)
1003 goto out;
1004 a = &afi[ret];
1005 nw = a->num_writers;
1006 wconf = check_writer_arg(cmd, &writer_num);
1007 if (!wconf) {
1008 ret = writer_num;
1009 goto out;
1010 }
1011 a->writers[nw] = &writers[writer_num];
1012 a->writer_conf[nw] = wconf;
1013 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
1014 nw, writer_names[writer_num]);
1015 a->num_writers++;
1016 }
1017 ret = 1;
1018 out:
1019 return ret;
1020 }
1021
1022 static int init_receivers(void)
1023 {
1024 int i, ret, receiver_num;
1025 char *cmd = NULL;
1026 struct audio_format_info *a;
1027
1028 for (i = 0; receivers[i].name; i++) {
1029 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1030 receivers[i].init(&receivers[i]);
1031 }
1032 for (i = 0; i < conf.receiver_given; i++) {
1033 char *arg = conf.receiver_arg[i];
1034 char *recv = strchr(arg, ':');
1035 ret = -E_MISSING_COLON;
1036 if (!recv)
1037 goto out;
1038 *recv = '\0';
1039 recv++;
1040 ret = get_audio_format_num(arg);
1041 if (ret < 0)
1042 goto out;
1043 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1044 if (!afi[ret].receiver_conf) {
1045 ret = -E_RECV_SYNTAX;
1046 goto out;
1047 }
1048 afi[ret].receiver = &receivers[receiver_num];
1049 }
1050 /* use the first available receiver with no arguments
1051 * for those audio formats for which no receiver
1052 * was specified
1053 */
1054 cmd = para_strdup(receivers[0].name);
1055 FOR_EACH_AUDIO_FORMAT(i) {
1056 a = &afi[i];
1057 if (a->receiver_conf)
1058 continue;
1059 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1060 if (!a->receiver_conf)
1061 return -E_RECV_SYNTAX;
1062 a->receiver = &receivers[receiver_num];
1063 }
1064 ret = 1;
1065 out:
1066 free(cmd);
1067 return ret;
1068 }
1069
1070 static int init_default_filters(void)
1071 {
1072 int i, ret = 1;
1073
1074 FOR_EACH_AUDIO_FORMAT(i) {
1075 struct audio_format_info *a = &afi[i];
1076 char *tmp;
1077 int j;
1078
1079 if (a->num_filters)
1080 continue; /* no default -- nothing to to */
1081 /* add "dec" to audio format name */
1082 tmp = make_message("%sdec", audio_formats[i]);
1083 for (j = 0; filters[j].name; j++)
1084 if (!strcmp(tmp, filters[j].name))
1085 break;
1086 free(tmp);
1087 ret = -E_UNSUPPORTED_FILTER;
1088 if (!filters[j].name)
1089 goto out;
1090 tmp = para_strdup(filters[j].name);
1091 ret = add_filter(i, tmp);
1092 free(tmp);
1093 if (ret < 0)
1094 goto out;
1095 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1096 filters[j].name);
1097 }
1098 out:
1099 return ret;
1100 }
1101
1102 static int init_filters(void)
1103 {
1104 int i, ret, nf;
1105
1106 filter_init(filters);
1107 nf = PARA_MAX(1, conf.filter_given);
1108 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
1109 FOR_EACH_AUDIO_FORMAT(i) {
1110 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
1111 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1112 }
1113 if (!conf.no_default_filters_given)
1114 return init_default_filters();
1115 for (i = 0; i < conf.filter_given; i++) {
1116 char *arg = conf.filter_arg[i];
1117 char *filter_name = strchr(arg, ':');
1118 ret = -E_MISSING_COLON;
1119 if (!filter_name)
1120 goto out;
1121 *filter_name = '\0';
1122 filter_name++;
1123 ret = get_audio_format_num(arg);
1124 if (ret < 0)
1125 goto out;
1126 ret = add_filter(ret, filter_name);
1127 if (ret < 0)
1128 goto out;
1129 }
1130 ret = init_default_filters(); /* use default values for the rest */
1131 out:
1132 return ret;
1133 }
1134
1135 static int init_stream_io(void)
1136 {
1137 int ret;
1138
1139 ret = init_writers();
1140 if (ret < 0)
1141 return ret;
1142 ret = init_receivers();
1143 if (ret < 0)
1144 return ret;
1145 ret = init_filters();
1146 if (ret < 0)
1147 return ret;
1148 return 1;
1149 }
1150
1151 static int dump_commands(int fd)
1152 {
1153 char *buf = para_strdup(""), *tmp = NULL;
1154 int i;
1155 ssize_t ret;
1156
1157 FOR_EACH_COMMAND(i) {
1158 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1159 cmds[i].description);
1160 free(buf);
1161 buf = tmp;
1162 }
1163 ret = client_write(fd, buf);
1164 free(buf);
1165 return ret;
1166 }
1167
1168 /*
1169 * command handlers don't close their fd on errors (ret < 0) so that
1170 * its caller can send an error message. Otherwise (ret >= 0) it's up
1171 * to each individual command to close the fd if necessary.
1172 */
1173
1174 static int com_help(int fd, int argc, char **argv)
1175 {
1176 int i, ret;
1177 char *buf;
1178 const char *dflt = "No such command. Available commands:\n";
1179
1180 if (argc < 2) {
1181 ret = dump_commands(fd);
1182 goto out;
1183 }
1184 FOR_EACH_COMMAND(i) {
1185 if (strcmp(cmds[i].name, argv[1]))
1186 continue;
1187 buf = make_message(
1188 "NAME\n\t%s -- %s\n"
1189 "SYNOPSIS\n\tpara_audioc %s\n"
1190 "DESCRIPTION\n%s\n",
1191 argv[1],
1192 cmds[i].description,
1193 cmds[i].synopsis,
1194 cmds[i].help
1195 );
1196 ret = client_write(fd, buf);
1197 free(buf);
1198 goto out;
1199 }
1200 ret = client_write(fd, dflt);
1201 if (ret > 0)
1202 ret = dump_commands(fd);
1203 out:
1204 if (ret >= 0)
1205 close(fd);
1206 return ret;
1207 }
1208
1209 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1210 {
1211 int i, ret;
1212 char *buf = NULL;
1213 long unsigned mask = ~0LU;
1214
1215 if (argc > 1) {
1216 mask = 0;
1217 for (i = 1; i < argc; i++) {
1218 ret = stat_item_valid(argv[i]);
1219 if (ret < 0)
1220 return ret;
1221 mask |= (1 << ret);
1222 }
1223 }
1224 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1225 if (mask & (1 << SI_PLAY_TIME)) {
1226 struct timeval *t = wstime();
1227 char *ts = get_time_string(t);
1228 if (ts) {
1229 ret = client_write(fd, ts);
1230 if (ret < 0)
1231 goto out;
1232 free(ts);
1233 }
1234 }
1235 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1236 char *tmp, *us = uptime_str();
1237 tmp = make_message("%s:%s\n",
1238 status_item_list[SI_AUDIOD_UPTIME], us);
1239 free(us);
1240 ret = client_write(fd, tmp);
1241 if (ret < 0)
1242 goto out;
1243 free(tmp);
1244 }
1245 if (mask & (1 << SI_AUDIOD_STATUS)) {
1246 char *s = audiod_status_string();
1247 ret = client_write(fd, s);
1248 if (ret < 0)
1249 goto out;
1250 free(s);
1251 }
1252 if (mask & (1 << SI_DECODER_FLAGS)) {
1253 char *df =decoder_flags();
1254 ret = client_write(fd, df);
1255 if (ret < 0)
1256 goto out;
1257 free(df);
1258 }
1259
1260 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1261 char *tmp, *v;
1262 if (!((1 << i) & mask))
1263 continue;
1264 v = stat_item_values[i];
1265 tmp = make_message("%s%s%s", buf? buf: "",
1266 v? v : "", v? "\n" : "");
1267 free(buf);
1268 buf = tmp;
1269 }
1270 ret = client_write(fd, buf);
1271 out:
1272 if (ret > 0)
1273 ret = stat_client_add(fd, mask);
1274 free(buf);
1275 return ret;
1276 }
1277
1278 static int com_grab(int fd, char *cmdline)
1279 {
1280 struct grab_client *gc;
1281 struct filter_node *fn;
1282 int i, err;
1283 char *msg;
1284
1285 gc = grab_client_new(fd, cmdline, &err);
1286 if (!gc)
1287 goto err_out;
1288 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1289 if (fn)
1290 activate_grab_client(gc, fn);
1291 return 1;
1292 err_out:
1293 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1294 return err;
1295 if (err == -E_GC_HELP_GIVEN) {
1296 msg = make_message("%s\n\n", grab_client_args_info_usage);
1297 for (i = 0; grab_client_args_info_help[i]; i++) {
1298 char *tmp = make_message("%s%s\n", msg,
1299 grab_client_args_info_help[i]);
1300 free(msg);
1301 msg = tmp;
1302 }
1303 } else
1304 msg = make_message("%s %s\n",
1305 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1306 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1307 err = client_write(fd, msg);
1308 free(msg);
1309 if (err < 0)
1310 return err;
1311 close(fd);
1312 return 1;
1313 }
1314
1315 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1316 {
1317 close(fd);
1318 clean_exit(EXIT_SUCCESS, "terminating on user request");
1319 }
1320
1321 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1322 {
1323 audiod_status = AUDIOD_ON;
1324 close(fd);
1325 return 1;
1326 }
1327
1328 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1329 {
1330 audiod_status = AUDIOD_OFF;
1331 close(fd);
1332 return 1;
1333 }
1334
1335 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1336 {
1337 audiod_status = AUDIOD_STANDBY;
1338 close(fd);
1339 return 1;
1340 }
1341
1342 static int com_cycle(int fd, int argc, char **argv)
1343 {
1344 switch (audiod_status) {
1345 case AUDIOD_ON:
1346 return com_sb(fd, argc, argv);
1347 break;
1348 case AUDIOD_OFF:
1349 return com_on(fd, argc, argv);
1350 break;
1351 case AUDIOD_STANDBY:
1352 return com_off(fd, argc, argv);
1353 break;
1354 }
1355 close(fd);
1356 return 1;
1357 }
1358
1359 static int check_perms(uid_t uid)
1360 {
1361 int i;
1362
1363 if (!conf.user_allow_given)
1364 return 1;
1365 for (i = 0; i < conf.user_allow_given; i++)
1366 if (uid == conf.user_allow_arg[i])
1367 return 1;
1368 return -E_UCRED_PERM;
1369 }
1370
1371 static int handle_connect(void)
1372 {
1373 int i, argc, ret, clifd = -1;
1374 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
1375 struct sockaddr_un unix_addr;
1376
1377 ret = para_accept(cmd_task->fd, &unix_addr, sizeof(struct sockaddr_un));
1378 if (ret < 0)
1379 goto out;
1380 clifd = ret;
1381 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1382 if (ret < 0)
1383 goto out;
1384 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
1385 ret = check_perms(ret);
1386 if (ret < 0)
1387 goto out;
1388 ret = -E_INVALID_AUDIOD_CMD;
1389 cmd = para_strdup(buf);
1390 p = strchr(cmd, '\n');
1391 if (!p)
1392 p = "";
1393 else {
1394 *p = '\0';
1395 p++;
1396 }
1397 for (i = 0; cmds[i].name; i++) {
1398 int j;
1399 if (strcmp(cmds[i].name, cmd))
1400 continue;
1401 if (cmds[i].handler) {
1402 argc = split_args(buf, &argv, "\n");
1403 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1404 ret = cmds[i].handler(clifd, argc, argv);
1405 goto out;
1406 }
1407 for (j = 0; p[j]; j++)
1408 if (p[j] == '\n')
1409 p[j] = ' ';
1410 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
1411 ret = cmds[i].line_handler(clifd, p);
1412 goto out;
1413 }
1414 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1415 out:
1416 free(cmd);
1417 free(buf);
1418 free(argv);
1419 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1420 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1421 client_write(clifd, tmp);
1422 free(tmp);
1423 close(clifd);
1424 }
1425 return ret;
1426 }
1427
1428 static void audiod_get_socket(void)
1429 {
1430 struct sockaddr_un unix_addr;
1431
1432 if (conf.socket_given)
1433 socket_name = para_strdup(conf.socket_arg);
1434 else {
1435 char *hn = para_hostname();
1436 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1437 hn);
1438 free(hn);
1439 }
1440 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1441 if (conf.force_given)
1442 unlink(socket_name);
1443 cmd_task->fd = create_pf_socket(socket_name, &unix_addr,
1444 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1445 if (cmd_task->fd < 0) {
1446 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1447 exit(EXIT_FAILURE); /* do not unlink socket */
1448 }
1449 if (listen(cmd_task->fd , 5) < 0) {
1450 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1451 exit(EXIT_FAILURE); /* do not unlink socket */
1452 }
1453 add_close_on_fork_list(cmd_task->fd);
1454 }
1455
1456 static int open_stat_pipe(void)
1457 {
1458 int ret, fd[3] = {-1, 1, 0};
1459 pid_t pid;
1460 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1461 if (ret >= 0) {
1462 ret = fd[1];
1463 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1464 add_close_on_fork_list(ret);
1465 } else
1466 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1467 return ret;
1468 }
1469
1470 void signal_event_handler(struct task *t)
1471 {
1472 struct signal_task *st = t->private_data;
1473 handle_signal(st->signum);
1474 }
1475
1476 void signal_pre_select(struct sched *s, struct task *t)
1477 {
1478 struct signal_task *st = t->private_data;
1479 t->ret = 1;
1480 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1481 }
1482
1483 void signal_post_select(struct sched *s, struct task *t)
1484 {
1485 struct signal_task *st = t->private_data;
1486 t->ret = 1;
1487 if (!FD_ISSET(st->fd, &s->rfds))
1488 return;
1489 t->ret = -E_SIGNAL_CAUGHT;
1490 st->signum = para_next_signal();
1491 }
1492
1493 void signal_setup_default(struct signal_task *st)
1494 {
1495 st->task.pre_select = signal_pre_select;
1496 st->task.post_select = signal_post_select;
1497 st->task.private_data = st;
1498 st->task.flags = 0;
1499 sprintf(st->task.status, "signal task");
1500 }
1501
1502 static void command_pre_select(struct sched *s, struct task *t)
1503 {
1504 struct command_task *ct = t->private_data;
1505 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1506
1507 }
1508
1509 static void command_post_select(struct sched *s, struct task *t)
1510 {
1511 int ret;
1512 struct command_task *ct = t->private_data;
1513
1514 if (audiod_status != AUDIOD_OFF)
1515 audiod_status_dump();
1516 t->ret = 1; /* always successful */
1517 if (!FD_ISSET(ct->fd, &s->rfds))
1518 return;
1519 ret = handle_connect();
1520 if (ret < 0)
1521 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1522 }
1523
1524 static void init_command_task(struct command_task *ct)
1525 {
1526 ct->task.pre_select = command_pre_select;
1527 ct->task.post_select = command_post_select;
1528 ct->task.private_data = ct;
1529 ct->task.flags = 0;
1530 sprintf(ct->task.status, "command task");
1531 }
1532
1533 static void status_pre_select(struct sched *s, struct task *t)
1534 {
1535 struct status_task *st = t->private_data;
1536 t->ret = 1;
1537 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
1538 close_stat_pipe();
1539 if (st->fd < 0 && audiod_status != AUDIOD_OFF) {
1540 st->fd = open_stat_pipe();
1541 st->loaded = 0;
1542 st->buf[0] = '\0';
1543 }
1544 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
1545 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1546 }
1547
1548 static void status_post_select(struct sched *s, struct task *t)
1549 {
1550 struct status_task *st = t->private_data;
1551 int ret;
1552
1553 t->ret = 1;
1554 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1555 return;
1556 ret = read(st->fd, st->buf + st->loaded,
1557 STRINGSIZE - 1 - st->loaded);
1558 if (ret <= 0) {
1559 close_stat_pipe();
1560 /* avoid busy loop if server is down */
1561 while (sleep(1) > 0) /* FIXME */
1562 ; /* try again*/
1563 } else {
1564 st->buf[ret + st->loaded] = '\0';
1565 st->loaded = for_each_line(st->buf, ret + st->loaded,
1566 &check_stat_line);
1567 }
1568 }
1569
1570 static void init_status_task(struct status_task *st)
1571 {
1572 st->task.pre_select = status_pre_select;
1573 st->task.post_select = status_post_select;
1574 st->task.private_data = st;
1575 st->task.flags = 0;
1576 st->loaded = 0;
1577 st->fd = -1;
1578 st->buf[0] = '\0';
1579 sprintf(st->task.status, "status task");
1580 }
1581
1582 static void set_initial_status(void)
1583 {
1584 audiod_status = AUDIOD_ON;
1585 if (!conf.mode_given)
1586 return;
1587 if (!strcmp(conf.mode_arg, "sb")) {
1588 audiod_status = AUDIOD_STANDBY;
1589 return;
1590 }
1591 if (!strcmp(conf.mode_arg, "off")) {
1592 audiod_status = AUDIOD_OFF;
1593 return;
1594 }
1595 if (strcmp(conf.mode_arg, "on"))
1596 PARA_WARNING_LOG("%s", "invalid mode\n");
1597 }
1598
1599 int main(int argc, char *argv[])
1600 {
1601 char *cf;
1602 int ret, i;
1603 struct sched s;
1604
1605 init_sched();
1606
1607 valid_fd_012();
1608 hostname = para_hostname();
1609 cmdline_parser(argc, argv, &conf);
1610 para_drop_privileges(conf.user_arg, conf.group_arg);
1611 cf = configfile_exists();
1612 if (cf) {
1613 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1614 PARA_EMERG_LOG("%s", "parse error in config file\n");
1615 exit(EXIT_FAILURE);
1616 }
1617 }
1618 if (conf.logfile_given)
1619 logfile = open_log(conf.logfile_arg);
1620 log_welcome("para_audiod", conf.loglevel_arg);
1621 i = init_stream_io();
1622 if (i < 0) {
1623 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1624 exit(EXIT_FAILURE);
1625 }
1626 server_uptime(UPTIME_SET);
1627 set_initial_status();
1628 FOR_EACH_SLOT(i)
1629 clear_slot(i);
1630 init_grabbing();
1631 setup_signal_handling();
1632 if (conf.daemon_given)
1633 daemon_init();
1634 audiod_get_socket(); /* doesn't return on errors */
1635
1636 signal_setup_default(sig_task);
1637 sig_task->task.event_handler = signal_event_handler;
1638
1639 init_status_task(stat_task);
1640 init_command_task(cmd_task);
1641 init_audiod_task(at);
1642
1643 register_task(&sig_task->task);
1644 register_task(&cmd_task->task);
1645 register_task(&stat_task->task);
1646 register_task(&at->task);
1647 s.default_timeout.tv_sec = 0;
1648 s.default_timeout.tv_usec = 99 * 1000;
1649 ret = sched(&s);
1650
1651 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1652 return EXIT_FAILURE;
1653 }