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