more audiod fixes
[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 s->fc->task.pre_select = filter_pre_select;
614 s->fc->task.event_handler = filter_event_handler;
615 s->fc->task.private_data = s->fc;
616 s->fc->task.flags = 0;
617 s->fc->eof = 0;
618
619 s->receiver_node->output_eof = &s->fc->eof;
620 sprintf(s->fc->task.status, "filter chain");
621 for (i = 0; i < nf; i++) {
622 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
623 fn->conf = a->filter_conf[i];
624 fn->fc = s->fc;
625 fn->filter = a->filters[i];
626 INIT_LIST_HEAD(&fn->callbacks);
627 list_add_tail(&fn->node, &s->fc->filters);
628 fn->filter->open(fn);
629 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
630 audio_formats[s->format], i + 1, nf,
631 fn->filter->name, slot_num);
632 s->fc->outbuf = fn->buf;
633 s->fc->out_loaded = &fn->loaded;
634 }
635 register_task(&s->fc->task);
636 }
637
638 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
639 {
640 struct filter_node *fn;
641 int i, j;
642
643 FOR_EACH_SLOT(i) {
644 struct slot_info *s = &slot[i];
645 if (s->format < 0 || !s->fc)
646 continue;
647 if (slot_num >= 0 && slot_num != i)
648 continue;
649 if (format >= 0 && s->format != format)
650 continue;
651 if (num_filters(i) < filternum)
652 continue;
653 /* success */
654 j = 1;
655 list_for_each_entry(fn, &s->fc->filters, node)
656 if (filternum <= 0 || j++ == filternum)
657 break;
658 return fn;
659 }
660 return NULL;
661 }
662
663 static void wng_event_handler(struct task *t)
664 {
665 struct writer_node_group *wng = t->private_data;
666 int i;
667
668 wng_unregister(wng);
669 FOR_EACH_SLOT(i) {
670 struct slot_info *s = &slot[i];
671 if (s->wng != wng)
672 continue;
673 // if (s->fc)
674 // s->fc->eof = 1;
675 // if (s->receiver_node)
676 // s->receiver_node->eof = 1;
677 PARA_INFO_LOG("slot %d: %s\n", i, PARA_STRERROR(-t->ret));
678 }
679 }
680
681 static void open_writers(int slot_num)
682 {
683 int ret, i;
684 struct slot_info *s = &slot[slot_num];
685 struct audio_format_info *a = &afi[s->format];
686
687 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
688 if (!a->num_writers)
689 s->wng = setup_default_wng();
690 else
691 s->wng = wng_new(a->num_writers);
692 if (s->fc) {
693 s->wng->buf = s->fc->outbuf;
694 s->wng->loaded = s->fc->out_loaded;
695 s->wng->input_eof = &s->fc->eof;
696 s->wng->channels = &s->fc->channels;
697 s->wng->samplerate = &s->fc->samplerate;
698 s->fc->output_eof = &s->wng->eof;
699 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
700 } else {
701 s->wng->buf = s->receiver_node->buf;
702 s->wng->loaded = &s->receiver_node->loaded;
703 s->wng->input_eof = &s->receiver_node->eof;
704 }
705 s->wng->task.event_handler = wng_event_handler;
706 for (i = 0; i < a->num_writers; i++) {
707 s->wng->writer_nodes[i].conf = a->writer_conf[i];
708 s->wng->writer_nodes[i].writer = a->writers[i];
709 sprintf(s->wng->writer_nodes[i].task.status, "writer_node");
710 }
711 ret = wng_open(s->wng); /* FIXME */
712 s->wstime = *now;
713 current_decoder = slot_num;
714 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
715 }
716
717 static void rn_event_handler(struct task *t)
718 {
719 // struct receiver_node *rn = t->private_data;
720 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
721 unregister_task(t);
722 }
723
724 static void open_receiver(int format)
725 {
726 struct audio_format_info *a = &afi[format];
727 struct slot_info *s;
728 int ret, slot_num;
729 struct receiver_node *rn;
730
731 slot_num = get_empty_slot();
732 if (slot_num < 0)
733 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
734 s = &slot[slot_num];
735 s->format = format;
736 s->receiver_node = para_calloc(sizeof(struct receiver_node));
737 rn = s->receiver_node;
738 rn->receiver = a->receiver;
739 rn->conf = a->receiver_conf;
740 ret = a->receiver->open(s->receiver_node);
741 if (ret < 0) {
742 PARA_ERROR_LOG("failed to open receiver (%s)\n",
743 PARA_STRERROR(-ret));
744 free(s->receiver_node);
745 s->receiver_node = NULL;
746 return;
747 }
748 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
749 audio_formats[s->format], a->receiver->name, slot_num);
750 rn->task.private_data = s->receiver_node;
751 rn->task.pre_select = a->receiver->pre_select;
752 rn->task.post_select = a->receiver->post_select;
753 rn->task.event_handler = rn_event_handler;
754 rn->task.flags = 0;
755 sprintf(rn->task.status, "receiver node");
756 register_task(&rn->task);
757 }
758
759 static int is_frozen(int format)
760 {
761 struct audio_format_info *a = &afi[format];
762
763 return (tv_diff(now, &a->restart_barrier, NULL) > 0)? 0 : 1;
764 }
765
766 static void open_current_receiver(void)
767 {
768 int i;
769
770 if (!af_status)
771 return;
772 i = get_audio_format_num(af_status);
773 if (i < 0)
774 return;
775 if (decoder_running(i) || is_frozen(i))
776 return;
777 open_receiver(i);
778 }
779
780 static void compute_time_diff(const struct timeval *status_time)
781 {
782 struct timeval tmp, diff;
783 static int count;
784 int sign;
785 const struct timeval max_deviation = {0, 500 * 1000};
786 const int time_smooth = 5;
787
788 sign = tv_diff(status_time, now, &diff);
789 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
790 // sign, sa_time_diff_sign);
791 if (!count) {
792 sa_time_diff_sign = sign;
793 sa_time_diff = diff;
794 count++;
795 return;
796 }
797 if (count > 5) {
798 int s = tv_diff(&diff, &sa_time_diff, &tmp);
799 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
800 PARA_WARNING_LOG("time diff jump: %lims\n",
801 s * tv2ms(&tmp));
802 }
803 count++;
804 sa_time_diff_sign = tv_convex_combination(
805 sa_time_diff_sign * time_smooth, &sa_time_diff,
806 count > 10? sign : sign * time_smooth, &diff,
807 &tmp);
808 sa_time_diff = tmp;
809 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
810 sign > 0? "+" : "-",
811 tv2ms(&diff),
812 sa_time_diff_sign ? "+" : "-",
813 tv2ms(&sa_time_diff)
814 );
815 }
816
817 static void check_stat_line(char *line)
818 {
819 int itemnum;
820 size_t ilen = 0;
821 long unsigned sec, usec;
822 char *tmp;
823
824 // PARA_INFO_LOG("line: %s\n", line);
825 if (!line)
826 return;
827 itemnum = stat_line_valid(line);
828 if (itemnum < 0) {
829 PARA_WARNING_LOG("invalid status line: %s\n", line);
830 return;
831 }
832 tmp = make_message("%s\n", line);
833 stat_client_write(tmp, itemnum);
834 free(tmp);
835 free(stat_item_values[itemnum]);
836 stat_item_values[itemnum] = para_strdup(line);
837 ilen = strlen(status_item_list[itemnum]);
838 switch (itemnum) {
839 case SI_STATUS:
840 playing = strstr(line, "playing")? 1 : 0;
841 break;
842 case SI_FORMAT:
843 free(af_status);
844 af_status = para_strdup(line + ilen + 1);
845 break;
846 case SI_OFFSET:
847 offset_seconds = atoi(line + ilen + 1);
848 break;
849 case SI_LENGTH:
850 length_seconds = atoi(line + ilen + 1);
851 break;
852 case SI_STREAM_START:
853 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
854 server_stream_start.tv_sec = sec;
855 server_stream_start.tv_usec = usec;
856 }
857 break;
858 case SI_CURRENT_TIME:
859 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
860 struct timeval tv = {sec, usec};
861 compute_time_diff(&tv);
862 }
863 break;
864 }
865 }
866
867 static void handle_signal(int sig)
868 {
869 switch (sig) {
870 case SIGCHLD:
871 for (;;) {
872 pid_t pid = para_reap_child();
873 if (pid <= 0)
874 return;
875 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
876 }
877 case SIGINT:
878 case SIGTERM:
879 case SIGHUP:
880 PARA_EMERG_LOG("terminating on signal %d\n", sig);
881 clean_exit(EXIT_FAILURE, "caught deadly signal");
882 return;
883 }
884 }
885
886 static void try_to_close_slot(int slot_num)
887 {
888 struct slot_info *s = &slot[slot_num];
889
890 if (s->format < 0)
891 return;
892 if (s->receiver_node && !s->receiver_node->eof)
893 return;
894 if (s->fc && !s->fc->eof)
895 return;
896 if (s->wng && !s->wng->eof)
897 return;
898 PARA_INFO_LOG("closing slot %d \n", slot_num);
899 wng_close(s->wng);
900 close_filters(s->fc);
901 free(s->fc);
902 close_receiver(slot_num);
903 clear_slot(slot_num);
904 }
905
906 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
907 {
908 int i;
909
910 t->ret = 1;
911 now = &s->now;
912 if (audiod_status != AUDIOD_ON)
913 kill_all_decoders();
914 else if (playing)
915 open_current_receiver();
916 FOR_EACH_SLOT(i) {
917 struct slot_info *s = &slot[i];
918 struct audio_format_info *a;
919
920 try_to_close_slot(i);
921 if (s->format < 0)
922 continue;
923 a = &afi[s->format];
924 if (!s->receiver_node)
925 continue;
926 if (!a->num_filters) {
927 if (s->receiver_node->loaded && !s->wng)
928 open_writers(i);
929 continue;
930 }
931 if (s->receiver_node->loaded && !s->fc) {
932 open_filters(i);
933 continue;
934 }
935 if (s->fc && *s->fc->out_loaded && !s->wng)
936 open_writers(i);
937 }
938 }
939
940 static void audiod_post_select(struct sched *s, __a_unused struct task *t)
941 {
942 /* only save away the current time for other users */
943 now = &s->now;
944 t->ret = 1;
945 }
946
947 static void init_audiod_task(struct task *t)
948 {
949 t->pre_select = audiod_pre_select;
950 t->post_select = audiod_post_select;
951 t->event_handler = NULL;
952 t->private_data = t;
953 t->flags = 0;
954 sprintf(t->status, "audiod task");
955 }
956
957 static int parse_stream_command(const char *txt, char **cmd)
958 {
959 char *p = strchr(txt, ':');
960 int i;
961
962 if (!p)
963 return -E_MISSING_COLON;
964 p++;
965 FOR_EACH_AUDIO_FORMAT(i) {
966 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
967 continue;
968 *cmd = p;
969 return i;
970 }
971 return -E_UNSUPPORTED_AUDIO_FORMAT;
972 }
973
974 static int add_filter(int format, char *cmdline)
975 {
976 struct audio_format_info *a = &afi[format];
977 int filter_num, nf = a->num_filters;
978
979 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
980 if (filter_num < 0)
981 return filter_num;
982 a->filters[nf] = &filters[filter_num];
983 a->num_filters++;
984 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
985 a->filters[nf]->name);
986 return filter_num;
987 }
988
989 static int init_writers(void)
990 {
991 int i, ret, nw;
992 char *cmd;
993 struct audio_format_info *a;
994
995 init_supported_writers();
996 nw = PARA_MAX(1, conf.writer_given);
997 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
998 FOR_EACH_AUDIO_FORMAT(i) {
999 a = &afi[i];
1000 a->writer_conf = para_malloc(nw * sizeof(void *));
1001 a->writers = para_malloc(nw * sizeof(struct writer *));
1002 a->num_writers = 0;
1003 }
1004 for (i = 0; i < conf.writer_given; i++) {
1005 void *wconf;
1006 int writer_num;
1007 ret = parse_stream_command(conf.writer_arg[i], &cmd);
1008 if (ret < 0)
1009 goto out;
1010 a = &afi[ret];
1011 nw = a->num_writers;
1012 wconf = check_writer_arg(cmd, &writer_num);
1013 if (!wconf) {
1014 ret = writer_num;
1015 goto out;
1016 }
1017 a->writers[nw] = &writers[writer_num];
1018 a->writer_conf[nw] = wconf;
1019 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
1020 nw, writer_names[writer_num]);
1021 a->num_writers++;
1022 }
1023 ret = 1;
1024 out:
1025 return ret;
1026 }
1027
1028 static int init_receivers(void)
1029 {
1030 int i, ret, receiver_num;
1031 char *cmd = NULL;
1032 struct audio_format_info *a;
1033
1034 for (i = 0; receivers[i].name; i++) {
1035 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1036 receivers[i].init(&receivers[i]);
1037 }
1038 for (i = 0; i < conf.receiver_given; i++) {
1039 char *arg = conf.receiver_arg[i];
1040 char *recv = strchr(arg, ':');
1041 ret = -E_MISSING_COLON;
1042 if (!recv)
1043 goto out;
1044 *recv = '\0';
1045 recv++;
1046 ret = get_audio_format_num(arg);
1047 if (ret < 0)
1048 goto out;
1049 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1050 if (!afi[ret].receiver_conf) {
1051 ret = -E_RECV_SYNTAX;
1052 goto out;
1053 }
1054 afi[ret].receiver = &receivers[receiver_num];
1055 }
1056 /* use the first available receiver with no arguments
1057 * for those audio formats for which no receiver
1058 * was specified
1059 */
1060 cmd = para_strdup(receivers[0].name);
1061 FOR_EACH_AUDIO_FORMAT(i) {
1062 a = &afi[i];
1063 if (a->receiver_conf)
1064 continue;
1065 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1066 if (!a->receiver_conf)
1067 return -E_RECV_SYNTAX;
1068 a->receiver = &receivers[receiver_num];
1069 }
1070 ret = 1;
1071 out:
1072 free(cmd);
1073 return ret;
1074 }
1075
1076 static int init_default_filters(void)
1077 {
1078 int i, ret = 1;
1079
1080 FOR_EACH_AUDIO_FORMAT(i) {
1081 struct audio_format_info *a = &afi[i];
1082 char *tmp;
1083 int j;
1084
1085 if (a->num_filters)
1086 continue; /* no default -- nothing to to */
1087 /* add "dec" to audio format name */
1088 tmp = make_message("%sdec", audio_formats[i]);
1089 for (j = 0; filters[j].name; j++)
1090 if (!strcmp(tmp, filters[j].name))
1091 break;
1092 free(tmp);
1093 ret = -E_UNSUPPORTED_FILTER;
1094 if (!filters[j].name)
1095 goto out;
1096 tmp = para_strdup(filters[j].name);
1097 ret = add_filter(i, tmp);
1098 free(tmp);
1099 if (ret < 0)
1100 goto out;
1101 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1102 filters[j].name);
1103 }
1104 out:
1105 return ret;
1106 }
1107
1108 static int init_filters(void)
1109 {
1110 int i, ret, nf;
1111
1112 filter_init(filters);
1113 nf = PARA_MAX(1, conf.filter_given);
1114 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
1115 FOR_EACH_AUDIO_FORMAT(i) {
1116 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
1117 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1118 }
1119 if (!conf.no_default_filters_given)
1120 return init_default_filters();
1121 for (i = 0; i < conf.filter_given; i++) {
1122 char *arg = conf.filter_arg[i];
1123 char *filter_name = strchr(arg, ':');
1124 ret = -E_MISSING_COLON;
1125 if (!filter_name)
1126 goto out;
1127 *filter_name = '\0';
1128 filter_name++;
1129 ret = get_audio_format_num(arg);
1130 if (ret < 0)
1131 goto out;
1132 ret = add_filter(ret, filter_name);
1133 if (ret < 0)
1134 goto out;
1135 }
1136 ret = init_default_filters(); /* use default values for the rest */
1137 out:
1138 return ret;
1139 }
1140
1141 static int init_stream_io(void)
1142 {
1143 int ret;
1144
1145 ret = init_writers();
1146 if (ret < 0)
1147 return ret;
1148 ret = init_receivers();
1149 if (ret < 0)
1150 return ret;
1151 ret = init_filters();
1152 if (ret < 0)
1153 return ret;
1154 return 1;
1155 }
1156
1157 static int dump_commands(int fd)
1158 {
1159 char *buf = para_strdup(""), *tmp = NULL;
1160 int i;
1161 ssize_t ret;
1162
1163 FOR_EACH_COMMAND(i) {
1164 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1165 cmds[i].description);
1166 free(buf);
1167 buf = tmp;
1168 }
1169 ret = client_write(fd, buf);
1170 free(buf);
1171 return ret;
1172 }
1173
1174 /*
1175 * command handlers don't close their fd on errors (ret < 0) so that
1176 * its caller can send an error message. Otherwise (ret >= 0) it's up
1177 * to each individual command to close the fd if necessary.
1178 */
1179
1180 static int com_help(int fd, int argc, char **argv)
1181 {
1182 int i, ret;
1183 char *buf;
1184 const char *dflt = "No such command. Available commands:\n";
1185
1186 if (argc < 2) {
1187 ret = dump_commands(fd);
1188 goto out;
1189 }
1190 FOR_EACH_COMMAND(i) {
1191 if (strcmp(cmds[i].name, argv[1]))
1192 continue;
1193 buf = make_message(
1194 "NAME\n\t%s -- %s\n"
1195 "SYNOPSIS\n\tpara_audioc %s\n"
1196 "DESCRIPTION\n%s\n",
1197 argv[1],
1198 cmds[i].description,
1199 cmds[i].synopsis,
1200 cmds[i].help
1201 );
1202 ret = client_write(fd, buf);
1203 free(buf);
1204 goto out;
1205 }
1206 ret = client_write(fd, dflt);
1207 if (ret > 0)
1208 ret = dump_commands(fd);
1209 out:
1210 if (ret >= 0)
1211 close(fd);
1212 return ret;
1213 }
1214
1215 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1216 {
1217 int i, ret;
1218 char *buf = NULL;
1219 long unsigned mask = ~0LU;
1220
1221 if (argc > 1) {
1222 mask = 0;
1223 for (i = 1; i < argc; i++) {
1224 ret = stat_item_valid(argv[i]);
1225 if (ret < 0)
1226 return ret;
1227 mask |= (1 << ret);
1228 }
1229 }
1230 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1231 if (mask & (1 << SI_PLAY_TIME)) {
1232 struct timeval *t = wstime();
1233 char *ts = get_time_string(t);
1234 if (ts) {
1235 ret = client_write(fd, ts);
1236 if (ret < 0)
1237 goto out;
1238 free(ts);
1239 }
1240 }
1241 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1242 char *tmp, *us = uptime_str();
1243 tmp = make_message("%s:%s\n",
1244 status_item_list[SI_AUDIOD_UPTIME], us);
1245 free(us);
1246 ret = client_write(fd, tmp);
1247 if (ret < 0)
1248 goto out;
1249 free(tmp);
1250 }
1251 if (mask & (1 << SI_AUDIOD_STATUS)) {
1252 char *s = audiod_status_string();
1253 ret = client_write(fd, s);
1254 if (ret < 0)
1255 goto out;
1256 free(s);
1257 }
1258 if (mask & (1 << SI_DECODER_FLAGS)) {
1259 char *df =decoder_flags();
1260 ret = client_write(fd, df);
1261 if (ret < 0)
1262 goto out;
1263 free(df);
1264 }
1265
1266 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1267 char *tmp, *v;
1268 if (!((1 << i) & mask))
1269 continue;
1270 v = stat_item_values[i];
1271 tmp = make_message("%s%s%s", buf? buf: "",
1272 v? v : "", v? "\n" : "");
1273 free(buf);
1274 buf = tmp;
1275 }
1276 ret = client_write(fd, buf);
1277 out:
1278 if (ret > 0)
1279 ret = stat_client_add(fd, mask);
1280 free(buf);
1281 return ret;
1282 }
1283
1284 static int com_grab(int fd, char *cmdline)
1285 {
1286 struct grab_client *gc;
1287 struct filter_node *fn;
1288 int i, err;
1289 char *msg;
1290
1291 gc = grab_client_new(fd, cmdline, &err);
1292 if (!gc)
1293 goto err_out;
1294 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1295 if (fn)
1296 activate_grab_client(gc, fn);
1297 return 1;
1298 err_out:
1299 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1300 return err;
1301 if (err == -E_GC_HELP_GIVEN) {
1302 msg = make_message("%s\n\n", grab_client_args_info_usage);
1303 for (i = 0; grab_client_args_info_help[i]; i++) {
1304 char *tmp = make_message("%s%s\n", msg,
1305 grab_client_args_info_help[i]);
1306 free(msg);
1307 msg = tmp;
1308 }
1309 } else
1310 msg = make_message("%s %s\n",
1311 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1312 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1313 err = client_write(fd, msg);
1314 free(msg);
1315 if (err < 0)
1316 return err;
1317 close(fd);
1318 return 1;
1319 }
1320
1321 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1322 {
1323 close(fd);
1324 clean_exit(EXIT_SUCCESS, "terminating on user request");
1325 }
1326
1327 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1328 {
1329 audiod_status = AUDIOD_ON;
1330 close(fd);
1331 return 1;
1332 }
1333
1334 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1335 {
1336 audiod_status = AUDIOD_OFF;
1337 close(fd);
1338 return 1;
1339 }
1340
1341 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1342 {
1343 audiod_status = AUDIOD_STANDBY;
1344 close(fd);
1345 return 1;
1346 }
1347
1348 static int com_cycle(int fd, int argc, char **argv)
1349 {
1350 switch (audiod_status) {
1351 case AUDIOD_ON:
1352 return com_sb(fd, argc, argv);
1353 break;
1354 case AUDIOD_OFF:
1355 return com_on(fd, argc, argv);
1356 break;
1357 case AUDIOD_STANDBY:
1358 return com_off(fd, argc, argv);
1359 break;
1360 }
1361 close(fd);
1362 return 1;
1363 }
1364
1365 static int check_perms(uid_t uid)
1366 {
1367 int i;
1368
1369 if (!conf.user_allow_given)
1370 return 1;
1371 for (i = 0; i < conf.user_allow_given; i++)
1372 if (uid == conf.user_allow_arg[i])
1373 return 1;
1374 return -E_UCRED_PERM;
1375 }
1376
1377 static int handle_connect(int accept_fd)
1378 {
1379 int i, argc, ret, clifd = -1;
1380 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
1381 struct sockaddr_un unix_addr;
1382
1383 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
1384 if (ret < 0)
1385 goto out;
1386 clifd = ret;
1387 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1388 if (ret < 0)
1389 goto out;
1390 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
1391 ret = check_perms(ret);
1392 if (ret < 0)
1393 goto out;
1394 ret = -E_INVALID_AUDIOD_CMD;
1395 cmd = para_strdup(buf);
1396 p = strchr(cmd, '\n');
1397 if (!p)
1398 p = "";
1399 else {
1400 *p = '\0';
1401 p++;
1402 }
1403 for (i = 0; cmds[i].name; i++) {
1404 int j;
1405 if (strcmp(cmds[i].name, cmd))
1406 continue;
1407 if (cmds[i].handler) {
1408 argc = split_args(buf, &argv, "\n");
1409 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1410 ret = cmds[i].handler(clifd, argc, argv);
1411 goto out;
1412 }
1413 for (j = 0; p[j]; j++)
1414 if (p[j] == '\n')
1415 p[j] = ' ';
1416 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
1417 ret = cmds[i].line_handler(clifd, p);
1418 goto out;
1419 }
1420 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1421 out:
1422 free(cmd);
1423 free(buf);
1424 free(argv);
1425 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1426 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1427 client_write(clifd, tmp);
1428 free(tmp);
1429 close(clifd);
1430 }
1431 return ret;
1432 }
1433
1434 static int audiod_get_socket(void)
1435 {
1436 struct sockaddr_un unix_addr;
1437 int fd;
1438
1439 if (conf.socket_given)
1440 socket_name = para_strdup(conf.socket_arg);
1441 else {
1442 char *hn = para_hostname();
1443 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1444 hn);
1445 free(hn);
1446 }
1447 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
1448 if (conf.force_given)
1449 unlink(socket_name);
1450 fd = create_pf_socket(socket_name, &unix_addr,
1451 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1452 if (fd < 0) {
1453 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1454 exit(EXIT_FAILURE); /* do not unlink socket */
1455 }
1456 if (listen(fd , 5) < 0) {
1457 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1458 exit(EXIT_FAILURE); /* do not unlink socket */
1459 }
1460 add_close_on_fork_list(fd);
1461 return fd;
1462 }
1463
1464 static int open_stat_pipe(void)
1465 {
1466 int ret, fd[3] = {-1, 1, 0};
1467 pid_t pid;
1468 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1469 if (ret >= 0) {
1470 ret = fd[1];
1471 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1472 add_close_on_fork_list(ret);
1473 } else
1474 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1475 return ret;
1476 }
1477
1478 void signal_event_handler(struct task *t)
1479 {
1480 struct signal_task *st = t->private_data;
1481 handle_signal(st->signum);
1482 }
1483
1484 void signal_pre_select(struct sched *s, struct task *t)
1485 {
1486 struct signal_task *st = t->private_data;
1487 t->ret = 1;
1488 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1489 }
1490
1491 void signal_post_select(struct sched *s, struct task *t)
1492 {
1493 struct signal_task *st = t->private_data;
1494 t->ret = 1;
1495 if (!FD_ISSET(st->fd, &s->rfds))
1496 return;
1497 t->ret = -E_SIGNAL_CAUGHT;
1498 st->signum = para_next_signal();
1499 }
1500
1501 void signal_setup_default(struct signal_task *st)
1502 {
1503 st->task.pre_select = signal_pre_select;
1504 st->task.post_select = signal_post_select;
1505 st->task.private_data = st;
1506 st->task.flags = 0;
1507 sprintf(st->task.status, "signal task");
1508 }
1509
1510 static void command_pre_select(struct sched *s, struct task *t)
1511 {
1512 struct command_task *ct = t->private_data;
1513 t->ret = 1;
1514 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1515
1516 }
1517
1518 static void command_post_select(struct sched *s, struct task *t)
1519 {
1520 int ret;
1521 struct command_task *ct = t->private_data;
1522
1523 t->ret = 1; /* always successful */
1524 if (audiod_status != AUDIOD_OFF)
1525 audiod_status_dump();
1526 if (!FD_ISSET(ct->fd, &s->rfds))
1527 return;
1528 ret = handle_connect(ct->fd);
1529 if (ret < 0)
1530 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1531 }
1532
1533 static void init_command_task(struct command_task *ct)
1534 {
1535 ct->task.pre_select = command_pre_select;
1536 ct->task.post_select = command_post_select;
1537 ct->task.event_handler = NULL;
1538 ct->task.private_data = ct;
1539 ct->task.flags = 0;
1540 ct->fd = audiod_get_socket(); /* doesn't return on errors */
1541 sprintf(ct->task.status, "command task");
1542 }
1543
1544 static void status_pre_select(struct sched *s, struct task *t)
1545 {
1546 struct status_task *st = t->private_data;
1547 t->ret = 1;
1548 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
1549 close_stat_pipe();
1550 if (st->fd < 0 && audiod_status != AUDIOD_OFF) {
1551 st->fd = open_stat_pipe();
1552 st->loaded = 0;
1553 st->buf[0] = '\0';
1554 }
1555 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
1556 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1557 }
1558
1559 static void status_post_select(struct sched *s, struct task *t)
1560 {
1561 struct status_task *st = t->private_data;
1562 int ret;
1563
1564 t->ret = 1;
1565 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1566 return;
1567 ret = read(st->fd, st->buf + st->loaded,
1568 STRINGSIZE - 1 - st->loaded);
1569 if (ret <= 0) {
1570 close_stat_pipe();
1571 /* avoid busy loop if server is down */
1572 while (sleep(1) > 0) /* FIXME */
1573 ; /* try again*/
1574 } else {
1575 st->buf[ret + st->loaded] = '\0';
1576 st->loaded = for_each_line(st->buf, ret + st->loaded,
1577 &check_stat_line);
1578 }
1579 }
1580
1581 static void init_status_task(struct status_task *st)
1582 {
1583 st->task.pre_select = status_pre_select;
1584 st->task.post_select = status_post_select;
1585 st->task.private_data = st;
1586 st->task.flags = 0;
1587 st->loaded = 0;
1588 st->fd = -1;
1589 st->buf[0] = '\0';
1590 sprintf(st->task.status, "status task");
1591 }
1592
1593 static void set_initial_status(void)
1594 {
1595 audiod_status = AUDIOD_ON;
1596 if (!conf.mode_given)
1597 return;
1598 if (!strcmp(conf.mode_arg, "sb")) {
1599 audiod_status = AUDIOD_STANDBY;
1600 return;
1601 }
1602 if (!strcmp(conf.mode_arg, "off")) {
1603 audiod_status = AUDIOD_OFF;
1604 return;
1605 }
1606 if (strcmp(conf.mode_arg, "on"))
1607 PARA_WARNING_LOG("%s", "invalid mode\n");
1608 }
1609
1610 int main(int argc, char *argv[])
1611 {
1612 char *cf;
1613 int ret, i;
1614 struct sched s;
1615 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1616 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1617
1618 init_sched();
1619
1620 valid_fd_012();
1621 hostname = para_hostname();
1622 cmdline_parser(argc, argv, &conf);
1623 para_drop_privileges(conf.user_arg, conf.group_arg);
1624 cf = configfile_exists();
1625 if (cf) {
1626 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1627 PARA_EMERG_LOG("%s", "parse error in config file\n");
1628 exit(EXIT_FAILURE);
1629 }
1630 }
1631 if (conf.logfile_given)
1632 logfile = open_log(conf.logfile_arg);
1633 log_welcome("para_audiod", conf.loglevel_arg);
1634 i = init_stream_io();
1635 if (i < 0) {
1636 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1637 exit(EXIT_FAILURE);
1638 }
1639 server_uptime(UPTIME_SET);
1640 set_initial_status();
1641 FOR_EACH_SLOT(i)
1642 clear_slot(i);
1643 init_grabbing();
1644 setup_signal_handling();
1645 signal_setup_default(sig_task);
1646 sig_task->task.event_handler = signal_event_handler;
1647
1648 init_status_task(stat_task);
1649 init_command_task(cmd_task);
1650 init_audiod_task(audiod_task);
1651
1652 if (conf.daemon_given)
1653 daemon_init();
1654
1655 register_task(&sig_task->task);
1656 register_task(&cmd_task->task);
1657 register_task(&stat_task->task);
1658 register_task(audiod_task);
1659 s.default_timeout.tv_sec = 0;
1660 s.default_timeout.tv_usec = 99 * 1000;
1661 ret = sched(&s);
1662
1663 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1664 return EXIT_FAILURE;
1665 }