update audiod help text
[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 "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
38 /** define the array of error lists needed by para_audiod */
39 INIT_AUDIOD_ERRLISTS;
40 /** define the array containing all supported audio formats */
41 DEFINE_AUDIO_FORMAT_ARRAY;
42
43 /**
44 * the possible modes of operation
45 *
46 * - off: disconnect from para_server
47 * - on: receive status information from para_server and play the audio stream
48 * - sb: only receive status information but not the audio stream
49 */
50 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
51
52 /** defines how to handle one supported audio format */
53 struct audio_format_info {
54 /** pointer to the receiver for this audio format */
55 struct receiver *receiver;
56 /** the receiver configuration */
57 void *receiver_conf;
58 /** the number of filters that should be activated for this audio format */
59 unsigned int num_filters;
60 /** pointer to the array of filters to be activated */
61 struct filter **filters;
62 /** pointer to the array of filter configurations */
63 void **filter_conf;
64 /** output of the last filter is written to stdin of this command */
65 char *write_cmd;
66 /** do not start receiver/filters/writer before this time */
67 struct timeval restart_barrier;
68 };
69
70 /**
71 * describes one instance of a receiver-filter-writer chain
72 *
73 * \sa receier_node, receiver, filter, filter_node, filter_chain_info
74 */
75 struct slot_info {
76 /** number of the audio format in this slot */
77 int format;
78 /** the file descriptor of the writer */
79 int write_fd;
80 /** the process id of the writer */
81 pid_t wpid;
82 /** time of the last successful read from the receiver */
83 struct timeval rtime;
84 /** time the last write to the write fd happend */
85 struct timeval wtime;
86 /** writer start time */
87 struct timeval wstime;
88 /** did we include \a write_fd in the fdset */
89 int wcheck;
90 /** set to one if we have sent the TERM signal to \a wpid */
91 int wkilled;
92 /** the receiver info associated with this slot */
93 struct receiver_node *receiver_node;
94 /** the active filter chain */
95 struct filter_chain_info *fci;
96 };
97
98 static struct slot_info slot[MAX_STREAM_SLOTS];
99
100 /** defines one command of para_audiod */
101 struct audiod_command {
102 /** the name of the command */
103 const char *name;
104 /** pointer to the function that handles the command */
105 int (*handler)(int, int, char**);
106 /** one-line description of the command */
107 const char *description;
108 /** summary of the command line options */
109 const char *synopsis;
110 /** the long help text */
111 const char *help;
112 };
113
114 extern const char *status_item_list[NUM_STAT_ITEMS];
115
116 static int com_grab(int, int, char **);
117 static int com_cycle(int, int, char **);
118 static int com_help(int, int, char **);
119 static int com_off(int, int, char **);
120 static int com_on(int, int, char **);
121 static int com_sb(int, int, char **);
122 static int com_stat(int, int, char **);
123 static int com_term(int, int, char **);
124 static int stat_pipe = -1, signal_pipe;
125
126 static struct gengetopt_args_info conf;
127 static struct timeval server_stream_start, sa_time_diff;
128 static int playing, current_decoder = -1,
129 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
130 sa_time_diff_sign = 1, audiod_socket = -1;
131 static char *af_status, /* the audio format announced in server status */
132 *socket_name, *hostname;
133 static char *stat_item_values[NUM_STAT_ITEMS];
134 static FILE *logfile;
135 static const struct timeval restart_delay = {0, 300 * 1000};
136
137 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
138
139 static struct audiod_command cmds[] = {
140 {
141 .name = "cycle",
142 .handler = com_cycle,
143 .description = "switch to next mode",
144 .synopsis = "cycle",
145 .help =
146
147 "on -> standby -> off -> on\n"
148
149 },
150 {
151 .name = "grab",
152 .handler = com_grab,
153 .description = "grab the audio stream",
154 .synopsis = "-- grab [grab_options]",
155 .help =
156
157 "grab ('splice') the audio stream at any position in the filter \n"
158 "chain and send that data back to the client. Try\n"
159 "\t para_audioc -- grab -h\n"
160 "for the list of available options.\n"
161 },
162
163 {
164 .name = "help",
165 .handler = com_help,
166 .description = "display command list or help for given command",
167 .synopsis = "help [command]",
168 .help =
169
170 "When I was younger, so much younger than today, I never needed\n"
171 "anybody's help in any way. But now these days are gone, I'm not so\n"
172 "self assured. Now I find I've changed my mind and opened up the doors.\n"
173 "\n"
174 " -- Beatles: Help\n"
175
176 },
177 {
178 .name = "off",
179 .handler = com_off,
180 .description = "deactivate para_audiod",
181 .synopsis = "off",
182 .help =
183
184 "Close connection to para_server and stop all decoders.\n"
185
186 },
187 {
188 .name = "on",
189 .handler = com_on,
190 .description = "activate para_audiod",
191 .synopsis = "on",
192 .help =
193
194 "Establish connection to para_server, retrieve para_server's current\n"
195 "status. If playing, start corresponding decoder. Otherwise stop\n"
196 "all decoders.\n"
197
198 },
199 {
200 .name = "sb",
201 .handler = com_sb,
202 .description = "enter standby mode",
203 .synopsis = "sb",
204 .help =
205
206 "Stop all decoders but leave connection to para_server open.\n"
207
208 },
209 {
210 .name = "stat",
211 .handler = com_stat,
212 .description = "print status information",
213 .synopsis = "stat [item1 ...]",
214 .help =
215
216 "Dump given status items (all if none given) to stdout.\n"
217
218 },
219 {
220 .name = "term",
221 .handler = com_term,
222 .description = "terminate audiod",
223 .synopsis = "term",
224 .help =
225
226 "Stop all decoders, shut down connection to para_server and exit.\n"
227
228 },
229 {
230 .name = NULL,
231 }
232 };
233
234 /** iterate over all slots */
235 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
236 /** iterate over all supported audio formats */
237 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
238 /** iterate over the array of all audiod commands */
239 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
240
241 /**
242 * get the audio format number
243 * \param name the name of the audio format
244 *
245 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
246 * \a name is not a supported audio format.
247 */
248 int get_audio_format_num(char *name)
249 {
250 int i;
251 FOR_EACH_AUDIO_FORMAT(i)
252 if (!strcmp(name, audio_formats[i]))
253 return i;
254 return -E_UNSUPPORTED_AUDIO_FORMAT;
255 }
256
257 /*
258 * log function. first argument is loglevel.
259 */
260 void para_log(int ll, const char* fmt,...)
261 {
262 va_list argp;
263 FILE *outfd;
264 struct tm *tm;
265 time_t t1;
266 char str[MAXLINE] = "";
267
268 if (ll < conf.loglevel_arg)
269 return;
270 if (!logfile && conf.logfile_given)
271 logfile = open_log(conf.logfile_arg);
272 if (!logfile && conf.daemon_given)
273 return;
274 if (!logfile) {
275 if (ll < WARNING)
276 outfd = stdout;
277 else
278 outfd = stderr;
279 } else
280 outfd = logfile;
281 time(&t1);
282 tm = localtime(&t1);
283 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
284 fprintf(outfd, "%s %s ", str, hostname);
285 if (conf.loglevel_arg <= INFO)
286 fprintf(outfd, "%i ", ll);
287 va_start(argp, fmt);
288 vfprintf(outfd, fmt, argp);
289 va_end(argp);
290 }
291
292 static int client_write(int fd, const char *buf)
293 {
294 size_t len = strlen(buf);
295 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
296 }
297
298 static char *get_time_string(struct timeval *newest_stime)
299 {
300 struct timeval now, diff, adj_stream_start, tmp;
301 int total = 0, use_server_time = 1;
302
303 if (!playing) {
304 if (length_seconds)
305 return NULL;
306 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
307 }
308 if (audiod_status == AUDIOD_OFF)
309 goto out;
310 if (sa_time_diff_sign > 0)
311 tv_diff(&server_stream_start, &sa_time_diff,
312 &adj_stream_start);
313 else
314 tv_add(&server_stream_start, &sa_time_diff,
315 &adj_stream_start);
316 tmp = adj_stream_start;
317 if (newest_stime && audiod_status == AUDIOD_ON) {
318 tv_diff(newest_stime, &adj_stream_start, &diff);
319 if (tv2ms(&diff) < 5000) {
320 tmp = *newest_stime;
321 use_server_time = 0;
322 }
323 }
324 gettimeofday(&now, NULL);
325 tv_diff(&now, &tmp, &diff);
326 total = diff.tv_sec + offset_seconds;
327 if (total > length_seconds)
328 total = length_seconds;
329 if (total < 0)
330 total = 0;
331 out:
332 return make_message(
333 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
334 status_item_list[SI_PLAY_TIME],
335 use_server_time? "~" : "",
336 total / 60,
337 total % 60,
338 (length_seconds - total) / 60,
339 (length_seconds - total) % 60,
340 length_seconds? (total * 100 + length_seconds / 2) /
341 length_seconds : 0,
342 length_seconds / 60,
343 length_seconds % 60
344 );
345 }
346
347 __malloc static char *audiod_status_string(void)
348 {
349 const char *status = (audiod_status == AUDIOD_ON)?
350 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
351 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
352 }
353
354 static struct timeval *wstime(void)
355 {
356 int i;
357 struct timeval *max = NULL;
358 FOR_EACH_SLOT(i) {
359 struct slot_info *s = &slot[i];
360 if (s->wpid <= 0)
361 continue;
362 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
363 continue;
364 max = &s->wstime;
365 }
366 return max;
367 }
368 __malloc static char *decoder_flags(void)
369 {
370 int i;
371 char decoder_flags[MAX_STREAM_SLOTS + 1];
372
373 FOR_EACH_SLOT(i) {
374 struct slot_info *s = &slot[i];
375 char flag = '0';
376 if (s->receiver_node)
377 flag += 1;
378 if (s->wpid > 0)
379 flag += 2;
380 if (flag != '0')
381 flag += s->format * 4;
382 decoder_flags[i] = flag;
383 }
384 decoder_flags[MAX_STREAM_SLOTS] = '\0';
385 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
386 decoder_flags);
387 }
388
389 static char *configfile_exists(void)
390 {
391 static char *config_file;
392
393 if (!config_file) {
394 char *home = para_homedir();
395 config_file = make_message("%s/.paraslash/audiod.conf", home);
396 free(home);
397 }
398 return file_exists(config_file)? config_file : NULL;
399 }
400
401 static void setup_signal_handling(void)
402 {
403 signal_pipe = para_signal_init();
404 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe);
405 para_install_sighandler(SIGINT);
406 para_install_sighandler(SIGTERM);
407 para_install_sighandler(SIGCHLD);
408 para_install_sighandler(SIGHUP);
409 signal(SIGPIPE, SIG_IGN);
410 }
411
412 static void audiod_status_dump(void)
413 {
414 static char *p_ts, *p_us, *p_as, *p_df;
415 struct timeval *t = wstime();
416 char *us, *tmp = get_time_string(t);
417
418 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
419 stat_client_write(tmp, SI_PLAY_TIME);
420 free(p_ts);
421 p_ts = tmp;
422
423 us = uptime_str();
424 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
425 free(us);
426 if (!p_us || strcmp(p_us, tmp))
427 stat_client_write(tmp, SI_AUDIOD_UPTIME);
428 free(p_us);
429 p_us = tmp;
430
431 tmp = audiod_status_string();
432 if (!p_as || strcmp(p_as, tmp))
433 stat_client_write(tmp, SI_AUDIOD_STATUS);
434 free(p_as);
435 p_as = tmp;
436
437 tmp = decoder_flags();
438 if (!p_df || strcmp(p_df, tmp))
439 stat_client_write(tmp, SI_DECODER_FLAGS);
440 free(p_df);
441 p_df = tmp;
442 }
443
444 static void clear_slot(int slot_num)
445 {
446 struct slot_info *s = &slot[slot_num];
447
448 PARA_INFO_LOG("clearing slot %d\n", slot_num);
449 memset(s, 0, sizeof(struct slot_info));
450 s->format = -1;
451 }
452
453 static void kill_stream_writer(int slot_num)
454 {
455 struct slot_info *s = &slot[slot_num];
456
457 if (s->format < 0 || s->wkilled || s->wpid <= 0)
458 return;
459 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
460 s->wpid, audio_formats[s->format], slot_num);
461 kill(s->wpid, SIGTERM);
462 s->wkilled = 1;
463 s->fci->error = 1;
464 }
465
466 static void set_restart_barrier(int format, struct timeval *now)
467 {
468 struct timeval tmp;
469
470 if (now)
471 tmp = *now;
472 else
473 gettimeofday(&tmp, NULL);
474 tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
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 recevier in slot %d\n",
486 audio_formats[s->format] , slot_num);
487 a->receiver->close(s->receiver_node);
488 free(s->receiver_node);
489 s->receiver_node = NULL;
490 set_restart_barrier(s->format, NULL);
491 }
492
493 static void kill_all_decoders(void)
494 {
495 int i;
496
497 FOR_EACH_SLOT(i)
498 if (slot[i].format >= 0) {
499 PARA_INFO_LOG("stopping decoder in slot %d\n", i);
500 kill_stream_writer(i);
501 }
502 }
503
504 static void check_sigchld(void)
505 {
506 pid_t pid;
507 int i;
508 struct timeval now;
509 gettimeofday(&now, NULL);
510
511 reap_next_child:
512 pid = para_reap_child();
513 if (pid <= 0)
514 return;
515 FOR_EACH_SLOT(i) {
516 struct slot_info *s = &slot[i];
517 long lifetime;
518 if (s->format < 0)
519 continue;
520 if (pid == s->wpid) {
521 s->wpid = -1;
522 lifetime = now.tv_sec - s->wstime.tv_sec;
523 PARA_INFO_LOG("%s stream writer in slot %d died "
524 "after %li secs\n",
525 audio_formats[s->format], i, lifetime);
526 set_restart_barrier(s->format, &now);
527 goto reap_next_child;
528 }
529 }
530 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
531 goto reap_next_child;
532 }
533
534 static int get_empty_slot(void)
535 {
536 int i;
537 struct slot_info *s;
538
539 FOR_EACH_SLOT(i) {
540 s = &slot[i];
541 if (s->format < 0) {
542 clear_slot(i);
543 return i;
544 }
545 if (s->write_fd > 0 || s->wpid > 0)
546 continue;
547 if (s->receiver_node)
548 continue;
549 if (s->fci)
550 continue;
551 clear_slot(i);
552 return i;
553 }
554 return -E_NO_MORE_SLOTS;
555 }
556
557 static int decoder_running(int format)
558 {
559 int i, ret = 0;
560 struct slot_info *s;
561
562 FOR_EACH_SLOT(i) {
563 s = &slot[i];
564 if (s->format == format && s->receiver_node)
565 ret |= 1;
566 if (s->format == format && s->wpid > 0)
567 ret |= 2;
568 }
569 return ret;
570 }
571
572 static void close_stat_pipe(void)
573 {
574 int i;
575
576 if (stat_pipe < 0)
577 return;
578 PARA_NOTICE_LOG("%s", "closing status pipe\n");
579 close(stat_pipe);
580 del_close_on_fork_list(stat_pipe);
581 stat_pipe = -1;
582 kill_all_decoders();
583 for (i = 0; i < NUM_STAT_ITEMS; i++) {
584 free(stat_item_values[i]);
585 stat_item_values[i] = NULL;
586 }
587 dump_empty_status();
588 length_seconds = 0;
589 offset_seconds = 0;
590 audiod_status_dump();
591 playing = 0;
592 stat_item_values[SI_STATUS_BAR] = make_message("%s:no connection to para_server\n",
593 status_item_list[SI_STATUS_BAR]);
594 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
595 }
596
597 static void __noreturn clean_exit(int status, const char *msg)
598 {
599 PARA_EMERG_LOG("%s\n", msg);
600 kill_all_decoders();
601 if (socket_name)
602 unlink(socket_name);
603 if (stat_pipe >= 0)
604 close_stat_pipe();
605 exit(status);
606 }
607
608 __malloc static char *glob_cmd(char *cmd)
609 {
610 char *ret, *replacement;
611 struct timeval tmp, delay, rss; /* real stream start */
612
613 delay.tv_sec = conf.stream_delay_arg / 1000;
614 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
615 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
616 if (sa_time_diff_sign < 0)
617 tv_add(&server_stream_start, &sa_time_diff, &rss);
618 else
619 tv_diff(&server_stream_start, &sa_time_diff, &rss);
620 tv_add(&rss, &delay, &tmp);
621 replacement = make_message("%lu:%lu", tmp.tv_sec, tmp.tv_usec);
622 ret = s_a_r(cmd, "STREAM_START", replacement);
623 free(replacement);
624 if (!ret)
625 goto out;
626 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd, ret);
627 {
628 struct timeval now;
629 gettimeofday(&now, NULL);
630 PARA_INFO_LOG("now: %lu:%lu\n", now.tv_sec, now.tv_usec);
631 }
632 out:
633 return ret;
634 }
635
636 /** get the number of filters for the given audio format */
637 int num_filters(int audio_format_num)
638 {
639 return afi[audio_format_num].num_filters;
640 }
641
642 static void open_filters(int slot_num)
643 {
644 struct slot_info *s = &slot[slot_num];
645 struct audio_format_info *a = &afi[s->format];
646 int nf = a->num_filters;
647 int i;
648
649 s->fci = para_calloc(sizeof(struct filter_chain_info));
650 INIT_LIST_HEAD(&s->fci->filters);
651 if (!nf)
652 return;
653 s->fci->inbuf = s->receiver_node->buf;
654 s->fci->in_loaded = &s->receiver_node->loaded;
655 s->fci->outbuf = s->receiver_node->buf;
656 s->fci->out_loaded = &s->receiver_node->loaded;
657 s->fci->eof = &s->receiver_node->eof;
658 for (i = 0; i < nf; i++) {
659 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
660 fn->conf = a->filter_conf[i];
661 fn->fci = s->fci;
662 fn->filter = a->filters[i];
663 INIT_LIST_HEAD(&fn->callbacks);
664 list_add_tail(&fn->node, &s->fci->filters);
665 fn->filter->open(fn);
666 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
667 audio_formats[s->format], i + 1, nf,
668 fn->filter->name, slot_num);
669 s->fci->outbuf = fn->buf;
670 s->fci->out_loaded = &fn->loaded;
671 }
672 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s->fci,
673 s->fci->outbuf);
674 }
675
676 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
677 {
678 struct filter_node *fn;
679 int i, j;
680
681 FOR_EACH_SLOT(i) {
682 struct slot_info *s = &slot[i];
683 if (s->format < 0 || !s->fci)
684 continue;
685 if (slot_num >= 0 && slot_num != i)
686 continue;
687 if (format >= 0 && s->format != format)
688 continue;
689 if (num_filters(i) < filternum)
690 continue;
691 /* success */
692 j = 1;
693 list_for_each_entry(fn, &s->fci->filters, node)
694 if (filternum <= 0 || j++ == filternum)
695 break;
696 return fn;
697 }
698 return NULL;
699 }
700
701 static void start_stream_writer(int slot_num)
702 {
703 int ret, fds[3] = {1, -1, -1};
704 struct slot_info *s = &slot[slot_num];
705 struct audio_format_info *a = &afi[s->format];
706 char *glob = NULL;
707
708 if (a->write_cmd)
709 glob = glob_cmd(a->write_cmd);
710 if (!glob)
711 glob = para_strdup("para_play");
712 PARA_INFO_LOG("starting stream writer: %s\n", glob);
713 open_filters(slot_num);
714 ret = para_exec_cmdline_pid(&s->wpid, glob, fds);
715 free(glob);
716 if (ret < 0) {
717 PARA_ERROR_LOG("exec failed (%d)\n", ret);
718 return;
719 }
720 s->write_fd = fds[0];
721 add_close_on_fork_list(s->write_fd);
722 /* we write to this fd in do_select, so we need non-blocking */
723 fcntl(s->write_fd, F_SETFL, O_NONBLOCK);
724 gettimeofday(&s->wstime, NULL);
725 current_decoder = slot_num;
726 activate_inactive_grab_clients(slot_num, s->format, &s->fci->filters);
727 }
728
729 static void open_receiver(int format)
730 {
731 struct audio_format_info *a = &afi[format];
732 struct slot_info *s;
733 int ret, slot_num;
734
735 slot_num = get_empty_slot();
736 if (slot_num < 0)
737 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
738 s = &slot[slot_num];
739 s->format = format;
740 gettimeofday(&s->rtime, NULL);
741 s->wtime = s->rtime;
742 s->receiver_node = para_calloc(sizeof(struct receiver_node));
743 s->receiver_node->conf = a->receiver_conf;
744 ret = a->receiver->open(s->receiver_node);
745 if (ret < 0) {
746 PARA_ERROR_LOG("failed to open receiver (%s)\n",
747 PARA_STRERROR(-ret));
748 free(s->receiver_node);
749 s->receiver_node = NULL;
750 return;
751 }
752 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
753 audio_formats[s->format], a->receiver->name, slot_num);
754 }
755
756 static int is_frozen(int format)
757 {
758 struct timeval now;
759 struct audio_format_info *a = &afi[format];
760
761 gettimeofday(&now, NULL);
762 return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
763 }
764
765 static void start_current_receiver(void)
766 {
767 int i;
768
769 if (!af_status)
770 return;
771 i = get_audio_format_num(af_status);
772 if (i < 0)
773 return;
774 if ((decoder_running(i) & 1) || is_frozen(i))
775 return;
776 open_receiver(i);
777 }
778
779 static void compute_time_diff(const struct timeval *status_time)
780 {
781 struct timeval now, tmp, diff;
782 static int count;
783 int sign;
784 const struct timeval max_deviation = {0, 500 * 1000};
785 const int time_smooth = 5;
786
787 gettimeofday(&now, NULL);
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): "
810 "%li:%lu/%li:%lu\n",
811 sign * diff.tv_sec, (diff.tv_usec + 500) / 1000,
812 sa_time_diff_sign * sa_time_diff.tv_sec,
813 (sa_time_diff.tv_usec + 500)/ 1000);
814 }
815
816 static void check_stat_line(char *line)
817 {
818 int itemnum;
819 size_t ilen = 0;
820 struct timeval tv;
821 char *tmp;
822
823 if (!line)
824 return;
825 itemnum = stat_line_valid(line);
826 if (itemnum < 0) {
827 PARA_WARNING_LOG("invalid status line: %s\n", line);
828 return;
829 }
830 tmp = make_message("%s\n", line);
831 stat_client_write(tmp, itemnum);
832 free(tmp);
833 free(stat_item_values[itemnum]);
834 stat_item_values[itemnum] = para_strdup(line);
835 ilen = strlen(status_item_list[itemnum]);
836 switch (itemnum) {
837 case SI_STATUS:
838 playing = strstr(line, "playing")? 1 : 0;
839 break;
840 case SI_FORMAT:
841 free(af_status);
842 af_status = para_strdup(line + ilen + 1);
843 break;
844 case SI_OFFSET:
845 offset_seconds = atoi(line + ilen + 1);
846 break;
847 case SI_LENGTH:
848 length_seconds = atoi(line + ilen + 1);
849 break;
850 case SI_STREAM_START:
851 if (sscanf(line + ilen + 1, "%lu.%lu",
852 &tv.tv_sec, &tv.tv_usec) == 2)
853 server_stream_start = tv;
854 break;
855 case SI_CURRENT_TIME:
856 if (sscanf(line + ilen + 1, "%lu.%lu", &tv.tv_sec,
857 &tv.tv_usec) == 2)
858 compute_time_diff(&tv);
859 break;
860 }
861 }
862
863 static void handle_signal(int sig)
864 {
865 switch (sig) {
866 case SIGCHLD:
867 return check_sigchld();
868 case SIGINT:
869 case SIGTERM:
870 case SIGHUP:
871 PARA_EMERG_LOG("terminating on signal %d\n", sig);
872 clean_exit(EXIT_FAILURE, "caught deadly signal");
873 return;
874 }
875 }
876
877 static void check_timeouts(void)
878 {
879 struct timeval now;
880 int slot_num, timeout = conf.stream_timeout_arg;
881
882 gettimeofday(&now, NULL);
883 FOR_EACH_SLOT(slot_num) {
884 struct slot_info *s = &slot[slot_num];
885 if (s->format < 0)
886 continue;
887 /* check read time */
888 if (s->receiver_node &&
889 now.tv_sec > s->rtime.tv_sec + timeout) {
890 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
891 audio_formats[s->format], slot_num);
892 if (s->fci)
893 s->fci->error = 42;
894 else
895 close_receiver(slot_num);
896 }
897 /* check write time */
898 if (s->wpid > 0 && !s->wkilled &&
899 now.tv_sec > s->wtime.tv_sec + timeout) {
900 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
901 audio_formats[s->format], slot_num);
902 if (s->fci)
903 s->fci->error = 42;
904 }
905 }
906 }
907
908 static size_t get_loaded_bytes(int slot_num)
909 {
910 size_t loaded = 0;
911 struct slot_info *s = &slot[slot_num];
912 struct receiver_node *rn = s->receiver_node;
913
914 if (s->format < 0)
915 goto out;
916
917 if (afi[s->format].num_filters) {
918 if (s->fci)
919 loaded = *s->fci->out_loaded;
920 } else {
921 if (rn)
922 loaded = rn->loaded;
923 }
924 out:
925 return loaded;
926 }
927
928
929 static void close_decoder_if_idle(int slot_num)
930 {
931 struct slot_info *s = &slot[slot_num];
932 struct receiver_node *rn = s->receiver_node;
933
934 if (s->format < 0)
935 return;
936 if (!s->fci)
937 return;
938 if (!rn->eof && !s->fci->error && s->wpid > 0)
939 return;
940 if (!s->fci->error && s->wpid > 0) { /* eof */
941 if (filter_io(s->fci) > 0)
942 return;
943 if (get_loaded_bytes(slot_num))
944 return;
945 }
946 if (s->write_fd > 0) {
947 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num,
948 s->write_fd);
949 close(s->write_fd);
950 del_close_on_fork_list(s->write_fd);
951 s->write_fd = -1;
952 }
953 if (s->wpid > 0)
954 return; /* wait until writer dies before closing filters */
955 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
956 slot_num, s->fci);
957 close_filters(s->fci);
958 free(s->fci);
959 close_receiver(slot_num);
960 clear_slot(slot_num);
961 }
962
963 static int set_stream_fds(fd_set *wfds)
964 {
965 int i, max_fileno = -1;
966
967 check_timeouts();
968 FOR_EACH_SLOT(i) {
969 struct slot_info *s = &slot[i];
970 struct audio_format_info *a;
971 struct receiver_node *rn;
972
973 close_decoder_if_idle(i);
974 s->wcheck = 0;
975 if (s->format < 0)
976 continue;
977 a = &afi[s->format];
978 rn = s->receiver_node;
979 if (rn && rn->loaded && !s->wpid) {
980 PARA_INFO_LOG("no writer in slot %d\n", i);
981 start_stream_writer(i);
982 }
983 if (s->write_fd <= 0)
984 continue;
985 if (!get_loaded_bytes(i))
986 continue;
987 FD_SET(s->write_fd, wfds);
988 s->wcheck = 1;
989 max_fileno = MAX(s->write_fd, max_fileno);
990 }
991 // PARA_INFO_LOG("return %d\n", max_fileno);
992 return max_fileno;
993 }
994
995 static int write_audio_data(int slot_num)
996 {
997 struct slot_info *s = &slot[slot_num];
998 struct audio_format_info *a = &afi[s->format];
999 struct receiver_node *rn = s->receiver_node;
1000 int rv;
1001 char **buf;
1002 size_t *len;
1003
1004 if (a->num_filters) {
1005 buf = &s->fci->outbuf;
1006 len = s->fci->out_loaded;
1007 } else {
1008 buf = &rn->buf;
1009 len = &rn->loaded;
1010 }
1011 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf, *len);
1012 rv = write(s->write_fd, *buf, *len);
1013 PARA_DEBUG_LOG("wrote %d/%zd\n", rv, *len);
1014 if (rv < 0) {
1015 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
1016 slot_num, s->write_fd, strerror(errno));
1017 *len = 0;
1018 s->fci->error = E_WRITE_AUDIO_DATA;
1019 } else if (rv != *len) {
1020 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
1021 audio_formats[s->format], rv, *len, slot_num);
1022 *len -= rv;
1023 memmove(*buf, *buf + rv, *len);
1024 } else
1025 *len = 0;
1026 if (rv > 0)
1027 gettimeofday(&s->wtime, NULL);
1028 return rv;
1029 }
1030
1031 static void slot_io(fd_set *wfds)
1032 {
1033 int ret, i;
1034
1035 FOR_EACH_SLOT(i) {
1036 struct slot_info *s = &slot[i];
1037 struct receiver_node *rn = s->receiver_node;
1038
1039 if (rn && rn->loaded)
1040 gettimeofday(&s->rtime, NULL);
1041 if (s->format >= 0 && s->write_fd > 0 && s->fci) {
1042 ret = filter_io(s->fci);
1043 if (ret < 0)
1044 s->fci->error = -ret;
1045 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1046 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1047 }
1048 if (s->write_fd <= 0 || !s->wcheck || !FD_ISSET(s->write_fd, wfds))
1049 continue;
1050 write_audio_data(i);
1051 }
1052 }
1053
1054 static int parse_stream_command(const char *txt, char **cmd)
1055 {
1056 char *p = strchr(txt, ':');
1057 int i;
1058
1059 if (!p)
1060 return -E_MISSING_COLON;
1061 p++;
1062 FOR_EACH_AUDIO_FORMAT(i) {
1063 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1064 continue;
1065 *cmd = p;
1066 return i;
1067 }
1068 return -E_UNSUPPORTED_AUDIO_FORMAT;
1069 }
1070
1071 static int add_filter(int format, char *cmdline)
1072 {
1073 struct audio_format_info *a = &afi[format];
1074 int filter_num, nf = a->num_filters;
1075
1076 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1077 if (filter_num < 0)
1078 return filter_num;
1079 a->filters[nf] = &filters[filter_num];
1080 a->num_filters++;
1081 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1082 a->filters[nf]->name);
1083 return filter_num;
1084 }
1085
1086 static int setup_default_filters(void)
1087 {
1088 int i, ret = 1;
1089
1090 FOR_EACH_AUDIO_FORMAT(i) {
1091 struct audio_format_info *a = &afi[i];
1092 char *tmp;
1093 int j;
1094 if (a->num_filters)
1095 continue;
1096 /* add "dec" to audio format name */
1097 tmp = make_message("%sdec", audio_formats[i]);
1098 for (j = 0; filters[j].name; j++)
1099 if (!strcmp(tmp, filters[j].name))
1100 break;
1101 free(tmp);
1102 ret = -E_UNSUPPORTED_FILTER;
1103 if (!filters[j].name)
1104 goto out;
1105 tmp = para_strdup(filters[j].name);
1106 ret = add_filter(i, tmp);
1107 free(tmp);
1108 if (ret < 0)
1109 goto out;
1110 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i], filters[j].name);
1111 ret = add_filter(i, para_strdup("wav"));
1112 if (ret < 0)
1113 goto out;
1114 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1115 }
1116 out:
1117 return ret;
1118 }
1119
1120 static int init_stream_io(void)
1121 {
1122 int i, ret, receiver_num;
1123 char *cmd;
1124
1125 for (i = 0; i < conf.stream_write_cmd_given; i++) {
1126 ret = parse_stream_command(conf.stream_write_cmd_arg[i], &cmd);
1127 if (ret < 0)
1128 goto out;
1129 afi[ret].write_cmd = para_strdup(cmd);
1130 PARA_INFO_LOG("%s write command: %s\n", audio_formats[ret], afi[ret].write_cmd);
1131 }
1132 for (i = 0; receivers[i].name; i++) {
1133 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1134 receivers[i].init(&receivers[i]);
1135 }
1136 for (i = 0; i < conf.receiver_given; i++) {
1137 char *arg = conf.receiver_arg[i];
1138 char *recv = strchr(arg, ':');
1139 ret = -E_MISSING_COLON;
1140 if (!recv)
1141 goto out;
1142 *recv = '\0';
1143 recv++;
1144 ret = get_audio_format_num(arg);
1145 if (ret < 0)
1146 goto out;
1147 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1148 if (!afi[ret].receiver_conf) {
1149 ret = -E_RECV_SYNTAX;
1150 goto out;
1151 }
1152 afi[ret].receiver = &receivers[receiver_num];
1153 }
1154 /* use the first available receiver with no arguments
1155 * for those audio formats for which no receiver
1156 * was specified
1157 */
1158 cmd = para_strdup(receivers[0].name);
1159 FOR_EACH_AUDIO_FORMAT(i) {
1160 struct audio_format_info *a = &afi[i];
1161 if (a->receiver_conf)
1162 continue;
1163 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1164 if (!a->receiver_conf)
1165 return -E_RECV_SYNTAX;
1166 a->receiver = &receivers[receiver_num];
1167 }
1168 free(cmd);
1169 /* filters */
1170 filter_init(filters);
1171 FOR_EACH_AUDIO_FORMAT(i) {
1172 afi[i].filter_conf = para_malloc((conf.filter_given + 1) * sizeof(char *));
1173 afi[i].filters = para_malloc((conf.filter_given + 1) * sizeof(struct filter *));
1174 }
1175 if (!conf.no_default_filters_given)
1176 return setup_default_filters();
1177 for (i = 0; i < conf.filter_given; i++) {
1178 char *arg = conf.filter_arg[i];
1179 char *filter_name = strchr(arg, ':');
1180 ret = -E_MISSING_COLON;
1181 if (!filter_name)
1182 goto out;
1183 *filter_name = '\0';
1184 filter_name++;
1185 ret = get_audio_format_num(arg);
1186 if (ret < 0)
1187 goto out;
1188 ret = add_filter(ret, filter_name);
1189 if (ret < 0)
1190 goto out;
1191 }
1192 ret = 1;
1193 out:
1194 return ret;
1195 }
1196
1197 static int dump_commands(int fd)
1198 {
1199 char *buf = para_strdup(""), *tmp = NULL;
1200 int i;
1201 ssize_t ret;
1202
1203 FOR_EACH_COMMAND(i) {
1204 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1205 cmds[i].description);
1206 free(buf);
1207 buf = tmp;
1208 }
1209 ret = client_write(fd, buf);
1210 free(buf);
1211 return ret;
1212 }
1213
1214 /*
1215 * command handlers don't close their fd on errors (ret < 0) so that
1216 * its caller can send an error message. Otherwise (ret >= 0) it's up
1217 * to each individual command to close the fd if necessary.
1218 */
1219
1220 static int com_help(int fd, int argc, char **argv)
1221 {
1222 int i, ret;
1223 char *buf;
1224 const char *dflt = "No such command. Available commands:\n";
1225
1226 if (argc < 2) {
1227 ret = dump_commands(fd);
1228 goto out;
1229 }
1230 FOR_EACH_COMMAND(i) {
1231 if (strcmp(cmds[i].name, argv[1]))
1232 continue;
1233 buf = make_message(
1234 "NAME\n\t%s -- %s\n"
1235 "SYNOPSIS\n\tpara_audioc %s\n"
1236 "DESCRIPTION\n%s\n",
1237 argv[1],
1238 cmds[i].description,
1239 cmds[i].synopsis,
1240 cmds[i].help
1241 );
1242 ret = client_write(fd, buf);
1243 free(buf);
1244 goto out;
1245 }
1246 ret = client_write(fd, dflt);
1247 if (ret > 0)
1248 ret = dump_commands(fd);
1249 out:
1250 if (ret >= 0)
1251 close(fd);
1252 return ret;
1253 }
1254
1255 static int com_stat(int fd, __unused int argc, __unused char **argv)
1256 {
1257 int i, ret;
1258 char *buf = NULL;
1259 long unsigned mask = ~0LU;
1260
1261 if (argc > 1) {
1262 mask = 0;
1263 for (i = 1; i < argc; i++) {
1264 ret = stat_item_valid(argv[i]);
1265 if (ret < 0)
1266 return ret;
1267 mask |= (1 << ret);
1268 }
1269 }
1270 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1271 if (mask & (1 << SI_PLAY_TIME)) {
1272 struct timeval *t = wstime();
1273 char *ts = get_time_string(t);
1274 if (ts) {
1275 ret = client_write(fd, ts);
1276 if (ret < 0)
1277 goto out;
1278 free(ts);
1279 }
1280 }
1281 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1282 char *tmp, *us = uptime_str();
1283 tmp = make_message("%s:%s\n",
1284 status_item_list[SI_AUDIOD_UPTIME], us);
1285 free(us);
1286 ret = client_write(fd, tmp);
1287 if (ret < 0)
1288 goto out;
1289 free(tmp);
1290 }
1291 if (mask & (1 << SI_AUDIOD_STATUS)) {
1292 char *s = audiod_status_string();
1293 ret = client_write(fd, s);
1294 if (ret < 0)
1295 goto out;
1296 free(s);
1297 }
1298 if (mask & (1 << SI_DECODER_FLAGS)) {
1299 char *df =decoder_flags();
1300 ret = client_write(fd, df);
1301 if (ret < 0)
1302 goto out;
1303 free(df);
1304 }
1305
1306 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1307 char *tmp, *v;
1308 if (!((1 << i) & mask))
1309 continue;
1310 v = stat_item_values[i];
1311 tmp = make_message("%s%s%s", buf? buf: "",
1312 v? v : "", v? "\n" : "");
1313 free(buf);
1314 buf = tmp;
1315 }
1316 ret = client_write(fd, buf);
1317 out:
1318 if (ret > 0)
1319 ret = stat_client_add(fd, mask);
1320 free(buf);
1321 return ret;
1322 }
1323
1324 #if 0
1325 static char *list_filters(void)
1326 {
1327 int i, j;
1328 char *tmp, *msg = make_message("format\tnum\tcmd\n");
1329
1330 FOR_EACH_AUDIO_FORMAT(i) {
1331 for (j = 0; j < afi[i].num_filters; j++) {
1332 tmp = make_message("%s\t%i\t%s\n",
1333 afi[i].name, j, afi[i].filter_cmds[j]);
1334 msg = para_strcat(msg, tmp);
1335 free(tmp);
1336 }
1337 tmp = make_message("%s\t%i\t%s\n", afi[i].name,
1338 j, afi[i].write_cmd);
1339 msg = para_strcat(msg, tmp);
1340 free(tmp);
1341 }
1342 return msg;
1343 }
1344 #endif
1345
1346 static int com_grab(int fd, int argc, char **argv)
1347 {
1348 struct grab_client *gc;
1349 struct filter_node *fn;
1350 int i, err;
1351 char *msg;
1352
1353 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1354 gc = grab_client_new(fd, argc, argv, &err);
1355 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1356 if (!gc)
1357 goto err_out;
1358 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1359 if (fn)
1360 activate_grab_client(gc, fn);
1361 return 1;
1362 err_out:
1363 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1364 return err;
1365 if (err == -E_GC_HELP_GIVEN) {
1366 msg = make_message("%s\n\n", grab_client_args_info_usage);
1367 for (i = 0; grab_client_args_info_help[i]; i++) {
1368 char *tmp = make_message("%s%s\n", msg,
1369 grab_client_args_info_help[i]);
1370 free(msg);
1371 msg = tmp;
1372 }
1373 } else
1374 msg = make_message("%s %s\n",
1375 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1376 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1377 err = client_write(fd, msg);
1378 free(msg);
1379 if (err < 0)
1380 return err;
1381 close(fd);
1382 return 1;
1383 }
1384
1385 static int __noreturn com_term(int fd, __unused int argc, __unused char **argv)
1386 {
1387 close(fd);
1388 clean_exit(EXIT_SUCCESS, "terminating on user request");
1389 }
1390
1391 static int com_on(int fd, __unused int argc, __unused char **argv)
1392 {
1393 audiod_status = AUDIOD_ON;
1394 close(fd);
1395 return 1;
1396 }
1397
1398 static int com_off(int fd, __unused int argc, __unused char **argv)
1399 {
1400 audiod_status = AUDIOD_OFF;
1401 close(fd);
1402 return 1;
1403 }
1404
1405 static int com_sb(int fd, __unused int argc, __unused char **argv)
1406 {
1407 audiod_status = AUDIOD_STANDBY;
1408 close(fd);
1409 return 1;
1410 }
1411
1412 static int com_cycle(int fd, int argc, char **argv)
1413 {
1414 switch (audiod_status) {
1415 case AUDIOD_ON:
1416 return com_sb(fd, argc, argv);
1417 break;
1418 case AUDIOD_OFF:
1419 return com_on(fd, argc, argv);
1420 break;
1421 case AUDIOD_STANDBY:
1422 return com_off(fd, argc, argv);
1423 break;
1424 }
1425 close(fd);
1426 return 1;
1427 }
1428
1429 static int check_perms(struct ucred *c)
1430 {
1431 int i;
1432
1433 if (!conf.user_allow_given)
1434 return 1;
1435 for (i = 0; i < conf.user_allow_given; i++)
1436 if (c->uid == conf.user_allow_arg[i])
1437 return 1;
1438 return -E_UCRED_PERM;
1439 }
1440
1441 static int handle_connect(void)
1442 {
1443 int i, argc, ret, clifd = -1;
1444 struct ucred c;
1445 char *buf = para_malloc(MAXLINE), **argv = NULL;
1446 struct sockaddr_un unix_addr;
1447
1448 ret = para_accept(audiod_socket, &unix_addr, sizeof(struct sockaddr_un));
1449 if (ret < 0)
1450 goto out;
1451 clifd = ret;
1452 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1, &c);
1453 if (ret < 0)
1454 goto out;
1455 PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c.pid, c.uid, c.gid, ret, buf);
1456 buf[ret] = '\0';
1457 ret = check_perms(&c);
1458 if (ret < 0)
1459 goto out;
1460 argc = split_args(buf, &argv, '\n');
1461 PARA_INFO_LOG("argv[0]: %s\n", argv[0]);
1462 for (i = 0; cmds[i].name; i++) {
1463 if (strcmp(cmds[i].name, argv[0]))
1464 continue;
1465 ret = cmds[i].handler(clifd, argc + 1, argv);
1466 goto out;
1467 }
1468 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1469 out:
1470 free(buf);
1471 free(argv);
1472 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1473 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1474 client_write(clifd, tmp);
1475 free(tmp);
1476 close(clifd);
1477 }
1478 return ret;
1479 }
1480
1481 static void audiod_get_socket(void)
1482 {
1483 struct sockaddr_un unix_addr;
1484
1485 if (conf.socket_given)
1486 socket_name = para_strdup(conf.socket_arg);
1487 else {
1488 char *hn = para_hostname();
1489 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1490 hn);
1491 free(hn);
1492 }
1493 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1494 if (conf.force_given)
1495 unlink(socket_name);
1496 audiod_socket = create_pf_socket(socket_name, &unix_addr,
1497 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1498 if (audiod_socket < 0) {
1499 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1500 exit(EXIT_FAILURE); /* do not unlink socket */
1501 }
1502 if (listen(audiod_socket, 5) < 0) {
1503 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1504 exit(EXIT_FAILURE); /* do not unlink socket */
1505 }
1506 add_close_on_fork_list(audiod_socket);
1507 }
1508
1509 static int open_stat_pipe(void)
1510 {
1511 int ret, fd[3] = {-1, 1, 0};
1512 pid_t pid;
1513 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1514 if (ret >= 0) {
1515 ret = fd[1];
1516 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1517 add_close_on_fork_list(ret);
1518 } else
1519 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1520 return ret;
1521 }
1522
1523 static int pre_select(fd_set *rfds, fd_set *wfds, struct timeval *tv)
1524 {
1525 int i, ret, max = -1;
1526
1527 FOR_EACH_SLOT(i) {
1528 struct slot_info *s = &slot[i];
1529 struct audio_format_info *a;
1530 struct receiver_node *rn = s->receiver_node;
1531 if (s->format < 0 || !rn)
1532 continue;
1533 a = &afi[s->format];
1534 ret = a->receiver->pre_select(rn, rfds, wfds, tv);
1535 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1536 max = MAX(max, ret);
1537 }
1538 return max;
1539
1540 }
1541 static void audiod_post_select(int select_ret, fd_set *rfds, fd_set *wfds)
1542 {
1543 int i, ret;
1544
1545 FOR_EACH_SLOT(i) {
1546 struct slot_info *s = &slot[i];
1547 struct audio_format_info *a;
1548 struct receiver_node *rn = s->receiver_node;
1549 if (s->format < 0 || !rn || rn->eof)
1550 continue;
1551 a = &afi[s->format];
1552 ret = a->receiver->post_select(rn, select_ret, rfds, wfds);
1553 if (ret <= 0) {
1554 if (ret)
1555 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1556 a->receiver->name, PARA_STRERROR(-ret), i);
1557 else
1558 PARA_INFO_LOG("eof in slot %d\n", i);
1559 rn->eof = 1;
1560 }
1561 if (ret < 0 && s->fci)
1562 s->fci->error = ret;
1563 }
1564 }
1565
1566 /* TODO: move everything before the select call to pre_select() */
1567 static void __noreturn audiod_mainloop(void)
1568 {
1569 fd_set rfds, wfds;
1570 int ret, max_fileno, sbo = 0;
1571 char status_buf[STRINGSIZE] = "";
1572 struct timeval tv;
1573 repeat:
1574 FD_ZERO(&rfds);
1575 FD_ZERO(&wfds);
1576 max_fileno = 0;
1577 if (audiod_status != AUDIOD_ON)
1578 kill_all_decoders();
1579 else if (playing)
1580 start_current_receiver();
1581 max_fileno = set_stream_fds(&wfds);
1582 /* stat pipe (read) */
1583 if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
1584 close_stat_pipe();
1585 if (stat_pipe < 0 && audiod_status != AUDIOD_OFF) {
1586 stat_pipe = open_stat_pipe();
1587 sbo = 0;
1588 status_buf[0] = '\0';
1589 }
1590 if (stat_pipe >= 0 && audiod_status != AUDIOD_OFF) {
1591 FD_SET(stat_pipe, &rfds);
1592 max_fileno = MAX(max_fileno, stat_pipe);
1593 }
1594 /* always check signal pipe */
1595 FD_SET(signal_pipe, &rfds);
1596 max_fileno = MAX(max_fileno, signal_pipe);
1597 /* local socket */
1598 if (audiod_socket < 0)
1599 audiod_get_socket(); /* doesn't return on errors */
1600 FD_SET(audiod_socket, &rfds);
1601 max_fileno = MAX(max_fileno, audiod_socket);
1602 tv.tv_sec = 0;
1603 tv.tv_usec = 200 * 1000;
1604 ret = pre_select(&rfds, &wfds, &tv);
1605 max_fileno = MAX(max_fileno, ret);
1606 ret = select(max_fileno + 1, &rfds, &wfds, NULL, &tv);
1607 if (ret < 0 && errno != EINTR)
1608 PARA_ERROR_LOG("select returned %d (%s)\n", ret,
1609 strerror(errno));
1610 if (audiod_status != AUDIOD_OFF)
1611 audiod_status_dump();
1612 if (ret < 0)
1613 goto repeat;
1614 audiod_post_select(ret, &rfds, &wfds);
1615 /* read status pipe */
1616 if (stat_pipe >=0 && FD_ISSET(stat_pipe, &rfds)) {
1617 ret = read(stat_pipe, status_buf + sbo, STRINGSIZE - 1 - sbo);
1618 if (ret <= 0) {
1619 close_stat_pipe();
1620 /* avoid busy loop if server is down */
1621 while (sleep(1) > 0)
1622 ; /* try again*/
1623 } else {
1624 status_buf[ret + sbo] = '\0';
1625 sbo = for_each_line(status_buf, ret + sbo,
1626 &check_stat_line);
1627 }
1628 }
1629 slot_io(&wfds);
1630 if (FD_ISSET(audiod_socket, &rfds)) {
1631 ret = handle_connect();
1632 if (ret < 0) {
1633 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1634 }
1635 }
1636 /* signals */
1637 if (FD_ISSET(signal_pipe, &rfds)) {
1638 int sig_nr = para_next_signal();
1639 if (sig_nr > 0)
1640 handle_signal(sig_nr);
1641 }
1642 goto repeat;
1643 }
1644
1645 static void set_initial_status(void)
1646 {
1647 audiod_status = AUDIOD_ON;
1648 if (!conf.mode_given)
1649 return;
1650 if (!strcmp(conf.mode_arg, "sb")) {
1651 audiod_status = AUDIOD_STANDBY;
1652 return;
1653 }
1654 if (!strcmp(conf.mode_arg, "off")) {
1655 audiod_status = AUDIOD_OFF;
1656 return;
1657 }
1658 if (strcmp(conf.mode_arg, "on"))
1659 PARA_WARNING_LOG("%s", "invalid mode\n");
1660 }
1661
1662 int __noreturn main(int argc, char *argv[])
1663 {
1664 char *cf;
1665 int i;
1666
1667 valid_fd_012();
1668 hostname = para_hostname();
1669 cmdline_parser(argc, argv, &conf);
1670 para_drop_privileges(conf.user_arg);
1671 cf = configfile_exists();
1672 if (cf) {
1673 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1674 fprintf(stderr, "parse error in config file\n");
1675 exit(EXIT_FAILURE);
1676 }
1677 }
1678 log_welcome("para_audiod", conf.loglevel_arg);
1679 i = init_stream_io();
1680 if (i < 0) {
1681 fprintf(stderr, "init stream io error: %s\n",
1682 PARA_STRERROR(-i));
1683 exit(EXIT_FAILURE);
1684 }
1685 server_uptime(UPTIME_SET);
1686 set_initial_status();
1687 FOR_EACH_SLOT(i)
1688 clear_slot(i);
1689 init_grabbing();
1690 setup_signal_handling();
1691 if (conf.daemon_given)
1692 daemon_init();
1693 audiod_mainloop();
1694 }