new function: set_stream_fds()
[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 #include "fd.h"
38
39 /** define the array of error lists needed by para_audiod */
40 INIT_AUDIOD_ERRLISTS;
41 /** define the array containing all supported audio formats */
42 DEFINE_AUDIO_FORMAT_ARRAY;
43
44 /**
45 * the possible modes of operation
46 *
47 * - off: disconnect from para_server
48 * - on: receive status information from para_server and play the audio stream
49 * - sb: only receive status information but not the audio stream
50 */
51 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
52
53 /** defines how to handle one supported audio format */
54 struct audio_format_info {
55 /** pointer to the receiver for this audio format */
56 struct receiver *receiver;
57 /** the receiver configuration */
58 void *receiver_conf;
59 /** the number of filters that should be activated for this audio format */
60 unsigned int num_filters;
61 /** pointer to the array of filters to be activated */
62 struct filter **filters;
63 /** pointer to the array of filter configurations */
64 void **filter_conf;
65 /** output of the last filter is written to stdin of this command */
66 char *write_cmd;
67 /** do not start receiver/filters/writer before this time */
68 struct timeval restart_barrier;
69 };
70
71 /**
72 * describes one instance of a receiver-filter-writer chain
73 *
74 * \sa receier_node, receiver, filter, filter_node, filter_chain_info
75 */
76 struct slot_info {
77 /** number of the audio format in this slot */
78 int format;
79 /** the file descriptor of the writer */
80 int write_fd;
81 /** the process id of the writer */
82 pid_t wpid;
83 /** time of the last successful read from the receiver */
84 struct timeval rtime;
85 /** time the last write to the write fd happend */
86 struct timeval wtime;
87 /** writer start time */
88 struct timeval wstime;
89 /** did we include \a write_fd in the fdset */
90 int wcheck;
91 /** set to one if we have sent the TERM signal to \a wpid */
92 int wkilled;
93 /** the receiver info associated with this slot */
94 struct receiver_node *receiver_node;
95 /** the active filter chain */
96 struct filter_chain_info *fci;
97 };
98
99 static struct slot_info slot[MAX_STREAM_SLOTS];
100
101 /** defines one command of para_audiod */
102 struct audiod_command {
103 /** the name of the command */
104 const char *name;
105 /** pointer to the function that handles the command */
106 int (*handler)(int, int, char**);
107 /** one-line description of the command */
108 const char *description;
109 /** summary of the command line options */
110 const char *synopsis;
111 /** the long help text */
112 const char *help;
113 };
114
115 extern const char *status_item_list[NUM_STAT_ITEMS];
116
117 static int com_grab(int, int, char **);
118 static int com_cycle(int, int, char **);
119 static int com_help(int, int, char **);
120 static int com_off(int, int, char **);
121 static int com_on(int, int, char **);
122 static int com_sb(int, int, char **);
123 static int com_stat(int, int, char **);
124 static int com_term(int, int, char **);
125 static int stat_pipe = -1, signal_pipe;
126
127 static struct gengetopt_args_info conf;
128 static struct timeval server_stream_start, sa_time_diff;
129 static int playing, current_decoder = -1,
130 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
131 sa_time_diff_sign = 1, audiod_socket = -1;
132 static char *af_status, /* the audio format announced in server status */
133 *socket_name, *hostname;
134 static char *stat_item_values[NUM_STAT_ITEMS];
135 static FILE *logfile;
136 static const struct timeval restart_delay = {0, 300 * 1000};
137
138 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
139
140 static struct audiod_command cmds[] = {
141 {
142 .name = "cycle",
143 .handler = com_cycle,
144 .description = "switch to next mode",
145 .synopsis = "cycle",
146 .help =
147
148 "on -> standby -> off -> on\n"
149
150 },
151 {
152 .name = "grab",
153 .handler = com_grab,
154 .description = "grab the audio stream",
155 .synopsis = "-- grab [grab_options]",
156 .help =
157
158 "grab ('splice') the audio stream at any position in the filter \n"
159 "chain and send that data back to the client. Try\n"
160 "\t para_audioc -- grab -h\n"
161 "for the list of available options.\n"
162 },
163
164 {
165 .name = "help",
166 .handler = com_help,
167 .description = "display command list or help for given command",
168 .synopsis = "help [command]",
169 .help =
170
171 "When I was younger, so much younger than today, I never needed\n"
172 "anybody's help in any way. But now these days are gone, I'm not so\n"
173 "self assured. Now I find I've changed my mind and opened up the doors.\n"
174 "\n"
175 " -- Beatles: Help\n"
176
177 },
178 {
179 .name = "off",
180 .handler = com_off,
181 .description = "deactivate para_audiod",
182 .synopsis = "off",
183 .help =
184
185 "Close connection to para_server and stop all decoders.\n"
186
187 },
188 {
189 .name = "on",
190 .handler = com_on,
191 .description = "activate para_audiod",
192 .synopsis = "on",
193 .help =
194
195 "Establish connection to para_server, retrieve para_server's current\n"
196 "status. If playing, start corresponding decoder. Otherwise stop\n"
197 "all decoders.\n"
198
199 },
200 {
201 .name = "sb",
202 .handler = com_sb,
203 .description = "enter standby mode",
204 .synopsis = "sb",
205 .help =
206
207 "Stop all decoders but leave connection to para_server open.\n"
208
209 },
210 {
211 .name = "stat",
212 .handler = com_stat,
213 .description = "print status information",
214 .synopsis = "stat [item1 ...]",
215 .help =
216
217 "Dump given status items (all if none given) to stdout.\n"
218
219 },
220 {
221 .name = "term",
222 .handler = com_term,
223 .description = "terminate audiod",
224 .synopsis = "term",
225 .help =
226
227 "Stop all decoders, shut down connection to para_server and exit.\n"
228
229 },
230 {
231 .name = NULL,
232 }
233 };
234
235 /** iterate over all slots */
236 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
237 /** iterate over all supported audio formats */
238 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
239 /** iterate over the array of all audiod commands */
240 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
241
242 /**
243 * get the audio format number
244 * \param name the name of the audio format
245 *
246 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
247 * \a name is not a supported audio format.
248 */
249 int get_audio_format_num(char *name)
250 {
251 int i;
252 FOR_EACH_AUDIO_FORMAT(i)
253 if (!strcmp(name, audio_formats[i]))
254 return i;
255 return -E_UNSUPPORTED_AUDIO_FORMAT;
256 }
257
258 /*
259 * log function. first argument is loglevel.
260 */
261 void para_log(int ll, const char* fmt,...)
262 {
263 va_list argp;
264 FILE *outfd;
265 struct tm *tm;
266 time_t t1;
267 char str[MAXLINE] = "";
268
269 if (ll < conf.loglevel_arg)
270 return;
271 if (!logfile && conf.logfile_given)
272 logfile = open_log(conf.logfile_arg);
273 if (!logfile && conf.daemon_given)
274 return;
275 if (!logfile) {
276 if (ll < WARNING)
277 outfd = stdout;
278 else
279 outfd = stderr;
280 } else
281 outfd = logfile;
282 time(&t1);
283 tm = localtime(&t1);
284 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
285 fprintf(outfd, "%s %s ", str, hostname);
286 if (conf.loglevel_arg <= INFO)
287 fprintf(outfd, "%i ", ll);
288 va_start(argp, fmt);
289 vfprintf(outfd, fmt, argp);
290 va_end(argp);
291 }
292
293 static int client_write(int fd, const char *buf)
294 {
295 size_t len = strlen(buf);
296 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
297 }
298
299 static char *get_time_string(struct timeval *newest_stime)
300 {
301 struct timeval now, diff, adj_stream_start, tmp;
302 int total = 0, use_server_time = 1;
303
304 if (!playing) {
305 if (length_seconds)
306 return NULL;
307 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
308 }
309 if (audiod_status == AUDIOD_OFF)
310 goto out;
311 if (sa_time_diff_sign > 0)
312 tv_diff(&server_stream_start, &sa_time_diff,
313 &adj_stream_start);
314 else
315 tv_add(&server_stream_start, &sa_time_diff,
316 &adj_stream_start);
317 tmp = adj_stream_start;
318 if (newest_stime && audiod_status == AUDIOD_ON) {
319 tv_diff(newest_stime, &adj_stream_start, &diff);
320 if (tv2ms(&diff) < 5000) {
321 tmp = *newest_stime;
322 use_server_time = 0;
323 }
324 }
325 gettimeofday(&now, NULL);
326 tv_diff(&now, &tmp, &diff);
327 total = diff.tv_sec + offset_seconds;
328 if (total > length_seconds)
329 total = length_seconds;
330 if (total < 0)
331 total = 0;
332 out:
333 return make_message(
334 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
335 status_item_list[SI_PLAY_TIME],
336 use_server_time? "~" : "",
337 total / 60,
338 total % 60,
339 (length_seconds - total) / 60,
340 (length_seconds - total) % 60,
341 length_seconds? (total * 100 + length_seconds / 2) /
342 length_seconds : 0,
343 length_seconds / 60,
344 length_seconds % 60
345 );
346 }
347
348 __malloc static char *audiod_status_string(void)
349 {
350 const char *status = (audiod_status == AUDIOD_ON)?
351 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
352 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
353 }
354
355 static struct timeval *wstime(void)
356 {
357 int i;
358 struct timeval *max = NULL;
359 FOR_EACH_SLOT(i) {
360 struct slot_info *s = &slot[i];
361 if (s->wpid <= 0)
362 continue;
363 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
364 continue;
365 max = &s->wstime;
366 }
367 return max;
368 }
369 __malloc static char *decoder_flags(void)
370 {
371 int i;
372 char decoder_flags[MAX_STREAM_SLOTS + 1];
373
374 FOR_EACH_SLOT(i) {
375 struct slot_info *s = &slot[i];
376 char flag = '0';
377 if (s->receiver_node)
378 flag += 1;
379 if (s->wpid > 0)
380 flag += 2;
381 if (flag != '0')
382 flag += s->format * 4;
383 decoder_flags[i] = flag;
384 }
385 decoder_flags[MAX_STREAM_SLOTS] = '\0';
386 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
387 decoder_flags);
388 }
389
390 static char *configfile_exists(void)
391 {
392 static char *config_file;
393
394 if (!config_file) {
395 char *home = para_homedir();
396 config_file = make_message("%s/.paraslash/audiod.conf", home);
397 free(home);
398 }
399 return file_exists(config_file)? config_file : NULL;
400 }
401
402 static void setup_signal_handling(void)
403 {
404 signal_pipe = para_signal_init();
405 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe);
406 para_install_sighandler(SIGINT);
407 para_install_sighandler(SIGTERM);
408 para_install_sighandler(SIGCHLD);
409 para_install_sighandler(SIGHUP);
410 signal(SIGPIPE, SIG_IGN);
411 }
412
413 static void audiod_status_dump(void)
414 {
415 static char *p_ts, *p_us, *p_as, *p_df;
416 struct timeval *t = wstime();
417 char *us, *tmp = get_time_string(t);
418
419 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
420 stat_client_write(tmp, SI_PLAY_TIME);
421 free(p_ts);
422 p_ts = tmp;
423
424 us = uptime_str();
425 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
426 free(us);
427 if (!p_us || strcmp(p_us, tmp))
428 stat_client_write(tmp, SI_AUDIOD_UPTIME);
429 free(p_us);
430 p_us = tmp;
431
432 tmp = audiod_status_string();
433 if (!p_as || strcmp(p_as, tmp))
434 stat_client_write(tmp, SI_AUDIOD_STATUS);
435 free(p_as);
436 p_as = tmp;
437
438 tmp = decoder_flags();
439 if (!p_df || strcmp(p_df, tmp))
440 stat_client_write(tmp, SI_DECODER_FLAGS);
441 free(p_df);
442 p_df = tmp;
443 }
444
445 static void clear_slot(int slot_num)
446 {
447 struct slot_info *s = &slot[slot_num];
448
449 PARA_INFO_LOG("clearing slot %d\n", slot_num);
450 memset(s, 0, sizeof(struct slot_info));
451 s->format = -1;
452 }
453
454 static void kill_stream_writer(int slot_num)
455 {
456 struct slot_info *s = &slot[slot_num];
457
458 if (s->format < 0 || s->wkilled || s->wpid <= 0)
459 return;
460 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
461 s->wpid, audio_formats[s->format], slot_num);
462 kill(s->wpid, SIGTERM);
463 s->wkilled = 1;
464 s->fci->error = 1;
465 }
466
467 static void set_restart_barrier(int format, struct timeval *now)
468 {
469 struct timeval tmp;
470
471 if (now)
472 tmp = *now;
473 else
474 gettimeofday(&tmp, NULL);
475 tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
476 }
477
478 static void close_receiver(int slot_num)
479 {
480 struct slot_info *s = &slot[slot_num];
481 struct audio_format_info *a;
482
483 if (s->format < 0 || !s->receiver_node)
484 return;
485 a = &afi[s->format];
486 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
487 audio_formats[s->format] , slot_num);
488 a->receiver->close(s->receiver_node);
489 free(s->receiver_node);
490 s->receiver_node = NULL;
491 set_restart_barrier(s->format, NULL);
492 }
493
494 static void kill_all_decoders(void)
495 {
496 int i;
497
498 FOR_EACH_SLOT(i)
499 if (slot[i].format >= 0) {
500 PARA_INFO_LOG("stopping decoder in slot %d\n", i);
501 kill_stream_writer(i);
502 }
503 }
504
505 static void check_sigchld(void)
506 {
507 pid_t pid;
508 int i;
509 struct timeval now;
510 gettimeofday(&now, NULL);
511
512 reap_next_child:
513 pid = para_reap_child();
514 if (pid <= 0)
515 return;
516 FOR_EACH_SLOT(i) {
517 struct slot_info *s = &slot[i];
518 long lifetime;
519 if (s->format < 0)
520 continue;
521 if (pid == s->wpid) {
522 s->wpid = -1;
523 lifetime = now.tv_sec - s->wstime.tv_sec;
524 PARA_INFO_LOG("%s stream writer in slot %d died "
525 "after %li secs\n",
526 audio_formats[s->format], i, lifetime);
527 set_restart_barrier(s->format, &now);
528 goto reap_next_child;
529 }
530 }
531 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
532 goto reap_next_child;
533 }
534
535 static int get_empty_slot(void)
536 {
537 int i;
538 struct slot_info *s;
539
540 FOR_EACH_SLOT(i) {
541 s = &slot[i];
542 if (s->format < 0) {
543 clear_slot(i);
544 return i;
545 }
546 if (s->write_fd > 0 || s->wpid > 0)
547 continue;
548 if (s->receiver_node)
549 continue;
550 if (s->fci)
551 continue;
552 clear_slot(i);
553 return i;
554 }
555 return -E_NO_MORE_SLOTS;
556 }
557
558 static int decoder_running(int format)
559 {
560 int i, ret = 0;
561 struct slot_info *s;
562
563 FOR_EACH_SLOT(i) {
564 s = &slot[i];
565 if (s->format == format && s->receiver_node)
566 ret |= 1;
567 if (s->format == format && s->wpid > 0)
568 ret |= 2;
569 }
570 return ret;
571 }
572
573 static void close_stat_pipe(void)
574 {
575 int i;
576
577 if (stat_pipe < 0)
578 return;
579 PARA_NOTICE_LOG("%s", "closing status pipe\n");
580 close(stat_pipe);
581 del_close_on_fork_list(stat_pipe);
582 stat_pipe = -1;
583 kill_all_decoders();
584 for (i = 0; i < NUM_STAT_ITEMS; i++) {
585 free(stat_item_values[i]);
586 stat_item_values[i] = NULL;
587 }
588 dump_empty_status();
589 length_seconds = 0;
590 offset_seconds = 0;
591 audiod_status_dump();
592 playing = 0;
593 stat_item_values[SI_STATUS_BAR] = make_message("%s:no connection to para_server\n",
594 status_item_list[SI_STATUS_BAR]);
595 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
596 }
597
598 static void __noreturn clean_exit(int status, const char *msg)
599 {
600 PARA_EMERG_LOG("%s\n", msg);
601 kill_all_decoders();
602 if (socket_name)
603 unlink(socket_name);
604 if (stat_pipe >= 0)
605 close_stat_pipe();
606 exit(status);
607 }
608
609 __malloc static char *glob_cmd(char *cmd)
610 {
611 char *ret, *replacement;
612 struct timeval tmp, delay, rss; /* real stream start */
613
614 delay.tv_sec = conf.stream_delay_arg / 1000;
615 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
616 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
617 if (sa_time_diff_sign < 0)
618 tv_add(&server_stream_start, &sa_time_diff, &rss);
619 else
620 tv_diff(&server_stream_start, &sa_time_diff, &rss);
621 tv_add(&rss, &delay, &tmp);
622 replacement = make_message("%lu:%lu", tmp.tv_sec, tmp.tv_usec);
623 ret = s_a_r(cmd, "STREAM_START", replacement);
624 free(replacement);
625 if (!ret)
626 goto out;
627 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd, ret);
628 {
629 struct timeval now;
630 gettimeofday(&now, NULL);
631 PARA_INFO_LOG("now: %lu:%lu\n", now.tv_sec, now.tv_usec);
632 }
633 out:
634 return ret;
635 }
636
637 /** get the number of filters for the given audio format */
638 int num_filters(int audio_format_num)
639 {
640 return afi[audio_format_num].num_filters;
641 }
642
643 static void open_filters(int slot_num)
644 {
645 struct slot_info *s = &slot[slot_num];
646 struct audio_format_info *a = &afi[s->format];
647 int nf = a->num_filters;
648 int i;
649
650 s->fci = para_calloc(sizeof(struct filter_chain_info));
651 INIT_LIST_HEAD(&s->fci->filters);
652 if (!nf)
653 return;
654 s->fci->inbuf = s->receiver_node->buf;
655 s->fci->in_loaded = &s->receiver_node->loaded;
656 s->fci->outbuf = s->receiver_node->buf;
657 s->fci->out_loaded = &s->receiver_node->loaded;
658 s->fci->eof = &s->receiver_node->eof;
659 for (i = 0; i < nf; i++) {
660 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
661 fn->conf = a->filter_conf[i];
662 fn->fci = s->fci;
663 fn->filter = a->filters[i];
664 INIT_LIST_HEAD(&fn->callbacks);
665 list_add_tail(&fn->node, &s->fci->filters);
666 fn->filter->open(fn);
667 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
668 audio_formats[s->format], i + 1, nf,
669 fn->filter->name, slot_num);
670 s->fci->outbuf = fn->buf;
671 s->fci->out_loaded = &fn->loaded;
672 }
673 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s->fci,
674 s->fci->outbuf);
675 }
676
677 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
678 {
679 struct filter_node *fn;
680 int i, j;
681
682 FOR_EACH_SLOT(i) {
683 struct slot_info *s = &slot[i];
684 if (s->format < 0 || !s->fci)
685 continue;
686 if (slot_num >= 0 && slot_num != i)
687 continue;
688 if (format >= 0 && s->format != format)
689 continue;
690 if (num_filters(i) < filternum)
691 continue;
692 /* success */
693 j = 1;
694 list_for_each_entry(fn, &s->fci->filters, node)
695 if (filternum <= 0 || j++ == filternum)
696 break;
697 return fn;
698 }
699 return NULL;
700 }
701
702 static void start_stream_writer(int slot_num)
703 {
704 int ret, fds[3] = {1, -1, -1};
705 struct slot_info *s = &slot[slot_num];
706 struct audio_format_info *a = &afi[s->format];
707 char *glob = NULL;
708
709 if (a->write_cmd)
710 glob = glob_cmd(a->write_cmd);
711 if (!glob)
712 glob = para_strdup("para_play");
713 PARA_INFO_LOG("starting stream writer: %s\n", glob);
714 open_filters(slot_num);
715 ret = para_exec_cmdline_pid(&s->wpid, glob, fds);
716 free(glob);
717 if (ret < 0) {
718 PARA_ERROR_LOG("exec failed (%d)\n", ret);
719 return;
720 }
721 s->write_fd = fds[0];
722 add_close_on_fork_list(s->write_fd);
723 /* we write to this fd in do_select, so we need non-blocking */
724 mark_fd_nonblock(s->write_fd);
725 gettimeofday(&s->wstime, NULL);
726 current_decoder = slot_num;
727 activate_inactive_grab_clients(slot_num, s->format, &s->fci->filters);
728 }
729
730 static void open_receiver(int format)
731 {
732 struct audio_format_info *a = &afi[format];
733 struct slot_info *s;
734 int ret, slot_num;
735
736 slot_num = get_empty_slot();
737 if (slot_num < 0)
738 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
739 s = &slot[slot_num];
740 s->format = format;
741 gettimeofday(&s->rtime, NULL);
742 s->wtime = s->rtime;
743 s->receiver_node = para_calloc(sizeof(struct receiver_node));
744 s->receiver_node->conf = a->receiver_conf;
745 ret = a->receiver->open(s->receiver_node);
746 if (ret < 0) {
747 PARA_ERROR_LOG("failed to open receiver (%s)\n",
748 PARA_STRERROR(-ret));
749 free(s->receiver_node);
750 s->receiver_node = NULL;
751 return;
752 }
753 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
754 audio_formats[s->format], a->receiver->name, slot_num);
755 }
756
757 static int is_frozen(int format)
758 {
759 struct timeval now;
760 struct audio_format_info *a = &afi[format];
761
762 gettimeofday(&now, NULL);
763 return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
764 }
765
766 static void start_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) & 1) || 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 now, 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 gettimeofday(&now, NULL);
789 sign = tv_diff(status_time, &now, &diff);
790 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
791 // sign, sa_time_diff_sign);
792 if (!count) {
793 sa_time_diff_sign = sign;
794 sa_time_diff = diff;
795 count++;
796 return;
797 }
798 if (count > 5) {
799 int s = tv_diff(&diff, &sa_time_diff, &tmp);
800 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
801 PARA_WARNING_LOG("time diff jump: %lims\n",
802 s * tv2ms(&tmp));
803 }
804 count++;
805 sa_time_diff_sign = tv_convex_combination(
806 sa_time_diff_sign * time_smooth, &sa_time_diff,
807 count > 10? sign : sign * time_smooth, &diff,
808 &tmp);
809 sa_time_diff = tmp;
810 PARA_INFO_LOG("time diff (cur/avg): "
811 "%li:%lu/%li:%lu\n",
812 sign * diff.tv_sec, (diff.tv_usec + 500) / 1000,
813 sa_time_diff_sign * sa_time_diff.tv_sec,
814 (sa_time_diff.tv_usec + 500)/ 1000);
815 }
816
817 static void check_stat_line(char *line)
818 {
819 int itemnum;
820 size_t ilen = 0;
821 struct timeval tv;
822 char *tmp;
823
824 if (!line)
825 return;
826 itemnum = stat_line_valid(line);
827 if (itemnum < 0) {
828 PARA_WARNING_LOG("invalid status line: %s\n", line);
829 return;
830 }
831 tmp = make_message("%s\n", line);
832 stat_client_write(tmp, itemnum);
833 free(tmp);
834 free(stat_item_values[itemnum]);
835 stat_item_values[itemnum] = para_strdup(line);
836 ilen = strlen(status_item_list[itemnum]);
837 switch (itemnum) {
838 case SI_STATUS:
839 playing = strstr(line, "playing")? 1 : 0;
840 break;
841 case SI_FORMAT:
842 free(af_status);
843 af_status = para_strdup(line + ilen + 1);
844 break;
845 case SI_OFFSET:
846 offset_seconds = atoi(line + ilen + 1);
847 break;
848 case SI_LENGTH:
849 length_seconds = atoi(line + ilen + 1);
850 break;
851 case SI_STREAM_START:
852 if (sscanf(line + ilen + 1, "%lu.%lu",
853 &tv.tv_sec, &tv.tv_usec) == 2)
854 server_stream_start = tv;
855 break;
856 case SI_CURRENT_TIME:
857 if (sscanf(line + ilen + 1, "%lu.%lu", &tv.tv_sec,
858 &tv.tv_usec) == 2)
859 compute_time_diff(&tv);
860 break;
861 }
862 }
863
864 static void handle_signal(int sig)
865 {
866 switch (sig) {
867 case SIGCHLD:
868 return check_sigchld();
869 case SIGINT:
870 case SIGTERM:
871 case SIGHUP:
872 PARA_EMERG_LOG("terminating on signal %d\n", sig);
873 clean_exit(EXIT_FAILURE, "caught deadly signal");
874 return;
875 }
876 }
877
878 static void check_timeouts(void)
879 {
880 struct timeval now;
881 int slot_num, timeout = conf.stream_timeout_arg;
882
883 gettimeofday(&now, NULL);
884 FOR_EACH_SLOT(slot_num) {
885 struct slot_info *s = &slot[slot_num];
886 if (s->format < 0)
887 continue;
888 /* check read time */
889 if (s->receiver_node &&
890 now.tv_sec > s->rtime.tv_sec + timeout) {
891 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
892 audio_formats[s->format], slot_num);
893 if (s->fci)
894 s->fci->error = 42;
895 else
896 close_receiver(slot_num);
897 }
898 /* check write time */
899 if (s->wpid > 0 && !s->wkilled &&
900 now.tv_sec > s->wtime.tv_sec + timeout) {
901 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
902 audio_formats[s->format], slot_num);
903 if (s->fci)
904 s->fci->error = 42;
905 }
906 }
907 }
908
909 static size_t get_loaded_bytes(int slot_num)
910 {
911 size_t loaded = 0;
912 struct slot_info *s = &slot[slot_num];
913 struct receiver_node *rn = s->receiver_node;
914
915 if (s->format < 0)
916 goto out;
917
918 if (afi[s->format].num_filters) {
919 if (s->fci)
920 loaded = *s->fci->out_loaded;
921 } else {
922 if (rn)
923 loaded = rn->loaded;
924 }
925 out:
926 return loaded;
927 }
928
929
930 static void close_decoder_if_idle(int slot_num)
931 {
932 struct slot_info *s = &slot[slot_num];
933 struct receiver_node *rn = s->receiver_node;
934
935 if (s->format < 0)
936 return;
937 if (!s->fci)
938 return;
939 if (!rn->eof && !s->fci->error && s->wpid > 0)
940 return;
941 if (!s->fci->error && s->wpid > 0) { /* eof */
942 if (filter_io(s->fci) > 0)
943 return;
944 if (get_loaded_bytes(slot_num))
945 return;
946 }
947 if (s->write_fd > 0) {
948 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num,
949 s->write_fd);
950 close(s->write_fd);
951 del_close_on_fork_list(s->write_fd);
952 s->write_fd = -1;
953 }
954 if (s->wpid > 0)
955 return; /* wait until writer dies before closing filters */
956 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
957 slot_num, s->fci);
958 close_filters(s->fci);
959 free(s->fci);
960 close_receiver(slot_num);
961 clear_slot(slot_num);
962 }
963
964 static void set_stream_fds(fd_set *wfds, int *max_fileno)
965 {
966 int i;
967
968 check_timeouts();
969 FOR_EACH_SLOT(i) {
970 struct slot_info *s = &slot[i];
971 struct audio_format_info *a;
972 struct receiver_node *rn;
973
974 close_decoder_if_idle(i);
975 s->wcheck = 0;
976 if (s->format < 0)
977 continue;
978 a = &afi[s->format];
979 rn = s->receiver_node;
980 if (rn && rn->loaded && !s->wpid) {
981 PARA_INFO_LOG("no writer in slot %d\n", i);
982 start_stream_writer(i);
983 }
984 if (s->write_fd <= 0)
985 continue;
986 if (!get_loaded_bytes(i))
987 continue;
988 para_fd_set(s->write_fd, wfds, max_fileno);
989 s->wcheck = 1;
990 }
991 }
992
993 static int write_audio_data(int slot_num)
994 {
995 struct slot_info *s = &slot[slot_num];
996 struct audio_format_info *a = &afi[s->format];
997 struct receiver_node *rn = s->receiver_node;
998 int rv;
999 char **buf;
1000 size_t *len;
1001
1002 if (a->num_filters) {
1003 buf = &s->fci->outbuf;
1004 len = s->fci->out_loaded;
1005 } else {
1006 buf = &rn->buf;
1007 len = &rn->loaded;
1008 }
1009 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf, *len);
1010 rv = write(s->write_fd, *buf, *len);
1011 PARA_DEBUG_LOG("wrote %d/%zd\n", rv, *len);
1012 if (rv < 0) {
1013 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
1014 slot_num, s->write_fd, strerror(errno));
1015 *len = 0;
1016 s->fci->error = E_WRITE_AUDIO_DATA;
1017 } else if (rv != *len) {
1018 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
1019 audio_formats[s->format], rv, *len, slot_num);
1020 *len -= rv;
1021 memmove(*buf, *buf + rv, *len);
1022 } else
1023 *len = 0;
1024 if (rv > 0)
1025 gettimeofday(&s->wtime, NULL);
1026 return rv;
1027 }
1028
1029 static void slot_io(fd_set *wfds)
1030 {
1031 int ret, i;
1032
1033 FOR_EACH_SLOT(i) {
1034 struct slot_info *s = &slot[i];
1035 struct receiver_node *rn = s->receiver_node;
1036
1037 if (rn && rn->loaded)
1038 gettimeofday(&s->rtime, NULL);
1039 if (s->format >= 0 && s->write_fd > 0 && s->fci) {
1040 ret = filter_io(s->fci);
1041 if (ret < 0)
1042 s->fci->error = -ret;
1043 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1044 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1045 }
1046 if (s->write_fd <= 0 || !s->wcheck || !FD_ISSET(s->write_fd, wfds))
1047 continue;
1048 write_audio_data(i);
1049 }
1050 }
1051
1052 static int parse_stream_command(const char *txt, char **cmd)
1053 {
1054 char *p = strchr(txt, ':');
1055 int i;
1056
1057 if (!p)
1058 return -E_MISSING_COLON;
1059 p++;
1060 FOR_EACH_AUDIO_FORMAT(i) {
1061 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1062 continue;
1063 *cmd = p;
1064 return i;
1065 }
1066 return -E_UNSUPPORTED_AUDIO_FORMAT;
1067 }
1068
1069 static int add_filter(int format, char *cmdline)
1070 {
1071 struct audio_format_info *a = &afi[format];
1072 int filter_num, nf = a->num_filters;
1073
1074 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1075 if (filter_num < 0)
1076 return filter_num;
1077 a->filters[nf] = &filters[filter_num];
1078 a->num_filters++;
1079 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1080 a->filters[nf]->name);
1081 return filter_num;
1082 }
1083
1084 static int setup_default_filters(void)
1085 {
1086 int i, ret = 1;
1087
1088 FOR_EACH_AUDIO_FORMAT(i) {
1089 struct audio_format_info *a = &afi[i];
1090 char *tmp;
1091 int j;
1092 if (a->num_filters)
1093 continue;
1094 /* add "dec" to audio format name */
1095 tmp = make_message("%sdec", audio_formats[i]);
1096 for (j = 0; filters[j].name; j++)
1097 if (!strcmp(tmp, filters[j].name))
1098 break;
1099 free(tmp);
1100 ret = -E_UNSUPPORTED_FILTER;
1101 if (!filters[j].name)
1102 goto out;
1103 tmp = para_strdup(filters[j].name);
1104 ret = add_filter(i, tmp);
1105 free(tmp);
1106 if (ret < 0)
1107 goto out;
1108 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i], filters[j].name);
1109 ret = add_filter(i, para_strdup("wav"));
1110 if (ret < 0)
1111 goto out;
1112 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1113 }
1114 out:
1115 return ret;
1116 }
1117
1118 static int init_stream_io(void)
1119 {
1120 int i, ret, receiver_num;
1121 char *cmd;
1122
1123 for (i = 0; i < conf.stream_write_cmd_given; i++) {
1124 ret = parse_stream_command(conf.stream_write_cmd_arg[i], &cmd);
1125 if (ret < 0)
1126 goto out;
1127 afi[ret].write_cmd = para_strdup(cmd);
1128 PARA_INFO_LOG("%s write command: %s\n", audio_formats[ret], afi[ret].write_cmd);
1129 }
1130 for (i = 0; receivers[i].name; i++) {
1131 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1132 receivers[i].init(&receivers[i]);
1133 }
1134 for (i = 0; i < conf.receiver_given; i++) {
1135 char *arg = conf.receiver_arg[i];
1136 char *recv = strchr(arg, ':');
1137 ret = -E_MISSING_COLON;
1138 if (!recv)
1139 goto out;
1140 *recv = '\0';
1141 recv++;
1142 ret = get_audio_format_num(arg);
1143 if (ret < 0)
1144 goto out;
1145 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1146 if (!afi[ret].receiver_conf) {
1147 ret = -E_RECV_SYNTAX;
1148 goto out;
1149 }
1150 afi[ret].receiver = &receivers[receiver_num];
1151 }
1152 /* use the first available receiver with no arguments
1153 * for those audio formats for which no receiver
1154 * was specified
1155 */
1156 cmd = para_strdup(receivers[0].name);
1157 FOR_EACH_AUDIO_FORMAT(i) {
1158 struct audio_format_info *a = &afi[i];
1159 if (a->receiver_conf)
1160 continue;
1161 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1162 if (!a->receiver_conf)
1163 return -E_RECV_SYNTAX;
1164 a->receiver = &receivers[receiver_num];
1165 }
1166 free(cmd);
1167 /* filters */
1168 filter_init(filters);
1169 FOR_EACH_AUDIO_FORMAT(i) {
1170 afi[i].filter_conf = para_malloc((conf.filter_given + 1) * sizeof(char *));
1171 afi[i].filters = para_malloc((conf.filter_given + 1) * sizeof(struct filter *));
1172 }
1173 if (!conf.no_default_filters_given)
1174 return setup_default_filters();
1175 for (i = 0; i < conf.filter_given; i++) {
1176 char *arg = conf.filter_arg[i];
1177 char *filter_name = strchr(arg, ':');
1178 ret = -E_MISSING_COLON;
1179 if (!filter_name)
1180 goto out;
1181 *filter_name = '\0';
1182 filter_name++;
1183 ret = get_audio_format_num(arg);
1184 if (ret < 0)
1185 goto out;
1186 ret = add_filter(ret, filter_name);
1187 if (ret < 0)
1188 goto out;
1189 }
1190 ret = 1;
1191 out:
1192 return ret;
1193 }
1194
1195 static int dump_commands(int fd)
1196 {
1197 char *buf = para_strdup(""), *tmp = NULL;
1198 int i;
1199 ssize_t ret;
1200
1201 FOR_EACH_COMMAND(i) {
1202 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1203 cmds[i].description);
1204 free(buf);
1205 buf = tmp;
1206 }
1207 ret = client_write(fd, buf);
1208 free(buf);
1209 return ret;
1210 }
1211
1212 /*
1213 * command handlers don't close their fd on errors (ret < 0) so that
1214 * its caller can send an error message. Otherwise (ret >= 0) it's up
1215 * to each individual command to close the fd if necessary.
1216 */
1217
1218 static int com_help(int fd, int argc, char **argv)
1219 {
1220 int i, ret;
1221 char *buf;
1222 const char *dflt = "No such command. Available commands:\n";
1223
1224 if (argc < 2) {
1225 ret = dump_commands(fd);
1226 goto out;
1227 }
1228 FOR_EACH_COMMAND(i) {
1229 if (strcmp(cmds[i].name, argv[1]))
1230 continue;
1231 buf = make_message(
1232 "NAME\n\t%s -- %s\n"
1233 "SYNOPSIS\n\tpara_audioc %s\n"
1234 "DESCRIPTION\n%s\n",
1235 argv[1],
1236 cmds[i].description,
1237 cmds[i].synopsis,
1238 cmds[i].help
1239 );
1240 ret = client_write(fd, buf);
1241 free(buf);
1242 goto out;
1243 }
1244 ret = client_write(fd, dflt);
1245 if (ret > 0)
1246 ret = dump_commands(fd);
1247 out:
1248 if (ret >= 0)
1249 close(fd);
1250 return ret;
1251 }
1252
1253 static int com_stat(int fd, __unused int argc, __unused char **argv)
1254 {
1255 int i, ret;
1256 char *buf = NULL;
1257 long unsigned mask = ~0LU;
1258
1259 if (argc > 1) {
1260 mask = 0;
1261 for (i = 1; i < argc; i++) {
1262 ret = stat_item_valid(argv[i]);
1263 if (ret < 0)
1264 return ret;
1265 mask |= (1 << ret);
1266 }
1267 }
1268 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1269 if (mask & (1 << SI_PLAY_TIME)) {
1270 struct timeval *t = wstime();
1271 char *ts = get_time_string(t);
1272 if (ts) {
1273 ret = client_write(fd, ts);
1274 if (ret < 0)
1275 goto out;
1276 free(ts);
1277 }
1278 }
1279 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1280 char *tmp, *us = uptime_str();
1281 tmp = make_message("%s:%s\n",
1282 status_item_list[SI_AUDIOD_UPTIME], us);
1283 free(us);
1284 ret = client_write(fd, tmp);
1285 if (ret < 0)
1286 goto out;
1287 free(tmp);
1288 }
1289 if (mask & (1 << SI_AUDIOD_STATUS)) {
1290 char *s = audiod_status_string();
1291 ret = client_write(fd, s);
1292 if (ret < 0)
1293 goto out;
1294 free(s);
1295 }
1296 if (mask & (1 << SI_DECODER_FLAGS)) {
1297 char *df =decoder_flags();
1298 ret = client_write(fd, df);
1299 if (ret < 0)
1300 goto out;
1301 free(df);
1302 }
1303
1304 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1305 char *tmp, *v;
1306 if (!((1 << i) & mask))
1307 continue;
1308 v = stat_item_values[i];
1309 tmp = make_message("%s%s%s", buf? buf: "",
1310 v? v : "", v? "\n" : "");
1311 free(buf);
1312 buf = tmp;
1313 }
1314 ret = client_write(fd, buf);
1315 out:
1316 if (ret > 0)
1317 ret = stat_client_add(fd, mask);
1318 free(buf);
1319 return ret;
1320 }
1321
1322 #if 0
1323 static char *list_filters(void)
1324 {
1325 int i, j;
1326 char *tmp, *msg = make_message("format\tnum\tcmd\n");
1327
1328 FOR_EACH_AUDIO_FORMAT(i) {
1329 for (j = 0; j < afi[i].num_filters; j++) {
1330 tmp = make_message("%s\t%i\t%s\n",
1331 afi[i].name, j, afi[i].filter_cmds[j]);
1332 msg = para_strcat(msg, tmp);
1333 free(tmp);
1334 }
1335 tmp = make_message("%s\t%i\t%s\n", afi[i].name,
1336 j, afi[i].write_cmd);
1337 msg = para_strcat(msg, tmp);
1338 free(tmp);
1339 }
1340 return msg;
1341 }
1342 #endif
1343
1344 static int com_grab(int fd, int argc, char **argv)
1345 {
1346 struct grab_client *gc;
1347 struct filter_node *fn;
1348 int i, err;
1349 char *msg;
1350
1351 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1352 gc = grab_client_new(fd, argc, argv, &err);
1353 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1354 if (!gc)
1355 goto err_out;
1356 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1357 if (fn)
1358 activate_grab_client(gc, fn);
1359 return 1;
1360 err_out:
1361 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1362 return err;
1363 if (err == -E_GC_HELP_GIVEN) {
1364 msg = make_message("%s\n\n", grab_client_args_info_usage);
1365 for (i = 0; grab_client_args_info_help[i]; i++) {
1366 char *tmp = make_message("%s%s\n", msg,
1367 grab_client_args_info_help[i]);
1368 free(msg);
1369 msg = tmp;
1370 }
1371 } else
1372 msg = make_message("%s %s\n",
1373 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1374 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1375 err = client_write(fd, msg);
1376 free(msg);
1377 if (err < 0)
1378 return err;
1379 close(fd);
1380 return 1;
1381 }
1382
1383 static int __noreturn com_term(int fd, __unused int argc, __unused char **argv)
1384 {
1385 close(fd);
1386 clean_exit(EXIT_SUCCESS, "terminating on user request");
1387 }
1388
1389 static int com_on(int fd, __unused int argc, __unused char **argv)
1390 {
1391 audiod_status = AUDIOD_ON;
1392 close(fd);
1393 return 1;
1394 }
1395
1396 static int com_off(int fd, __unused int argc, __unused char **argv)
1397 {
1398 audiod_status = AUDIOD_OFF;
1399 close(fd);
1400 return 1;
1401 }
1402
1403 static int com_sb(int fd, __unused int argc, __unused char **argv)
1404 {
1405 audiod_status = AUDIOD_STANDBY;
1406 close(fd);
1407 return 1;
1408 }
1409
1410 static int com_cycle(int fd, int argc, char **argv)
1411 {
1412 switch (audiod_status) {
1413 case AUDIOD_ON:
1414 return com_sb(fd, argc, argv);
1415 break;
1416 case AUDIOD_OFF:
1417 return com_on(fd, argc, argv);
1418 break;
1419 case AUDIOD_STANDBY:
1420 return com_off(fd, argc, argv);
1421 break;
1422 }
1423 close(fd);
1424 return 1;
1425 }
1426
1427 static int check_perms(struct ucred *c)
1428 {
1429 int i;
1430
1431 if (!conf.user_allow_given)
1432 return 1;
1433 for (i = 0; i < conf.user_allow_given; i++)
1434 if (c->uid == conf.user_allow_arg[i])
1435 return 1;
1436 return -E_UCRED_PERM;
1437 }
1438
1439 static int handle_connect(void)
1440 {
1441 int i, argc, ret, clifd = -1;
1442 struct ucred c;
1443 char *buf = para_malloc(MAXLINE), **argv = NULL;
1444 struct sockaddr_un unix_addr;
1445
1446 ret = para_accept(audiod_socket, &unix_addr, sizeof(struct sockaddr_un));
1447 if (ret < 0)
1448 goto out;
1449 clifd = ret;
1450 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1, &c);
1451 if (ret < 0)
1452 goto out;
1453 PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c.pid, c.uid, c.gid, ret, buf);
1454 buf[ret] = '\0';
1455 ret = check_perms(&c);
1456 if (ret < 0)
1457 goto out;
1458 argc = split_args(buf, &argv, '\n');
1459 PARA_INFO_LOG("argv[0]: %s\n", argv[0]);
1460 for (i = 0; cmds[i].name; i++) {
1461 if (strcmp(cmds[i].name, argv[0]))
1462 continue;
1463 ret = cmds[i].handler(clifd, argc + 1, argv);
1464 goto out;
1465 }
1466 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1467 out:
1468 free(buf);
1469 free(argv);
1470 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1471 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1472 client_write(clifd, tmp);
1473 free(tmp);
1474 close(clifd);
1475 }
1476 return ret;
1477 }
1478
1479 static void audiod_get_socket(void)
1480 {
1481 struct sockaddr_un unix_addr;
1482
1483 if (conf.socket_given)
1484 socket_name = para_strdup(conf.socket_arg);
1485 else {
1486 char *hn = para_hostname();
1487 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1488 hn);
1489 free(hn);
1490 }
1491 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1492 if (conf.force_given)
1493 unlink(socket_name);
1494 audiod_socket = create_pf_socket(socket_name, &unix_addr,
1495 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1496 if (audiod_socket < 0) {
1497 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1498 exit(EXIT_FAILURE); /* do not unlink socket */
1499 }
1500 if (listen(audiod_socket, 5) < 0) {
1501 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1502 exit(EXIT_FAILURE); /* do not unlink socket */
1503 }
1504 add_close_on_fork_list(audiod_socket);
1505 }
1506
1507 static int open_stat_pipe(void)
1508 {
1509 int ret, fd[3] = {-1, 1, 0};
1510 pid_t pid;
1511 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1512 if (ret >= 0) {
1513 ret = fd[1];
1514 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1515 add_close_on_fork_list(ret);
1516 } else
1517 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1518 return ret;
1519 }
1520
1521 static void audiod_pre_select(fd_set *rfds, fd_set *wfds, struct timeval *tv,
1522 int *max_fileno)
1523 {
1524 int i, ret;
1525
1526 FOR_EACH_SLOT(i) {
1527 struct slot_info *s = &slot[i];
1528 struct audio_format_info *a;
1529 struct receiver_node *rn = s->receiver_node;
1530 if (s->format < 0 || !rn)
1531 continue;
1532 a = &afi[s->format];
1533 ret = a->receiver->pre_select(rn, rfds, wfds, tv);
1534 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1535 *max_fileno = MAX(*max_fileno, ret);
1536 }
1537 }
1538 static void audiod_post_select(int select_ret, fd_set *rfds, fd_set *wfds)
1539 {
1540 int i, ret;
1541
1542 FOR_EACH_SLOT(i) {
1543 struct slot_info *s = &slot[i];
1544 struct audio_format_info *a;
1545 struct receiver_node *rn = s->receiver_node;
1546 if (s->format < 0 || !rn || rn->eof)
1547 continue;
1548 a = &afi[s->format];
1549 ret = a->receiver->post_select(rn, select_ret, rfds, wfds);
1550 if (ret <= 0) {
1551 if (ret)
1552 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1553 a->receiver->name, PARA_STRERROR(-ret), i);
1554 else
1555 PARA_INFO_LOG("eof in slot %d\n", i);
1556 rn->eof = 1;
1557 }
1558 if (ret < 0 && s->fci)
1559 s->fci->error = ret;
1560 }
1561 }
1562
1563 /* TODO: move everything before the select call to pre_select() */
1564 static void __noreturn audiod_mainloop(void)
1565 {
1566 fd_set rfds, wfds;
1567 int ret, max_fileno, sbo = 0;
1568 char status_buf[STRINGSIZE] = "";
1569 struct timeval tv;
1570 repeat:
1571 FD_ZERO(&wfds);
1572 FD_ZERO(&rfds);
1573 /* always check signal pipe and the local socket */
1574 FD_SET(signal_pipe, &rfds);
1575 max_fileno = signal_pipe;
1576 para_fd_set(audiod_socket, &rfds, &max_fileno);
1577
1578 if (audiod_status != AUDIOD_ON)
1579 kill_all_decoders();
1580 else if (playing)
1581 start_current_receiver();
1582
1583 set_stream_fds(&wfds, &max_fileno);
1584 /* status pipe */
1585 if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
1586 close_stat_pipe();
1587 if (stat_pipe < 0 && audiod_status != AUDIOD_OFF) {
1588 stat_pipe = open_stat_pipe();
1589 sbo = 0;
1590 status_buf[0] = '\0';
1591 }
1592 if (stat_pipe >= 0 && audiod_status != AUDIOD_OFF)
1593 para_fd_set(stat_pipe, &rfds, &max_fileno);
1594 /* local socket */
1595 tv.tv_sec = 0;
1596 tv.tv_usec = 200 * 1000;
1597 audiod_pre_select(&rfds, &wfds, &tv, &max_fileno);
1598 ret = para_select(max_fileno + 1, &rfds, &wfds, &tv);
1599 if (ret < 0)
1600 goto repeat;
1601 if (audiod_status != AUDIOD_OFF)
1602 audiod_status_dump();
1603 audiod_post_select(ret, &rfds, &wfds);
1604 /* read status pipe */
1605 if (stat_pipe >=0 && FD_ISSET(stat_pipe, &rfds)) {
1606 ret = read(stat_pipe, status_buf + sbo, STRINGSIZE - 1 - sbo);
1607 if (ret <= 0) {
1608 close_stat_pipe();
1609 /* avoid busy loop if server is down */
1610 while (sleep(1) > 0)
1611 ; /* try again*/
1612 } else {
1613 status_buf[ret + sbo] = '\0';
1614 sbo = for_each_line(status_buf, ret + sbo,
1615 &check_stat_line);
1616 }
1617 }
1618 slot_io(&wfds);
1619 if (FD_ISSET(audiod_socket, &rfds)) {
1620 ret = handle_connect();
1621 if (ret < 0) {
1622 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1623 }
1624 }
1625 /* signals */
1626 if (FD_ISSET(signal_pipe, &rfds)) {
1627 int sig_nr = para_next_signal();
1628 if (sig_nr > 0)
1629 handle_signal(sig_nr);
1630 }
1631 goto repeat;
1632 }
1633
1634 static void set_initial_status(void)
1635 {
1636 audiod_status = AUDIOD_ON;
1637 if (!conf.mode_given)
1638 return;
1639 if (!strcmp(conf.mode_arg, "sb")) {
1640 audiod_status = AUDIOD_STANDBY;
1641 return;
1642 }
1643 if (!strcmp(conf.mode_arg, "off")) {
1644 audiod_status = AUDIOD_OFF;
1645 return;
1646 }
1647 if (strcmp(conf.mode_arg, "on"))
1648 PARA_WARNING_LOG("%s", "invalid mode\n");
1649 }
1650
1651 int __noreturn main(int argc, char *argv[])
1652 {
1653 char *cf;
1654 int i;
1655
1656 valid_fd_012();
1657 hostname = para_hostname();
1658 cmdline_parser(argc, argv, &conf);
1659 para_drop_privileges(conf.user_arg);
1660 cf = configfile_exists();
1661 if (cf) {
1662 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1663 fprintf(stderr, "parse error in config file\n");
1664 exit(EXIT_FAILURE);
1665 }
1666 }
1667 log_welcome("para_audiod", conf.loglevel_arg);
1668 i = init_stream_io();
1669 if (i < 0) {
1670 fprintf(stderr, "init stream io error: %s\n",
1671 PARA_STRERROR(-i));
1672 exit(EXIT_FAILURE);
1673 }
1674 server_uptime(UPTIME_SET);
1675 set_initial_status();
1676 FOR_EACH_SLOT(i)
1677 clear_slot(i);
1678 init_grabbing();
1679 setup_signal_handling();
1680 if (conf.daemon_given)
1681 daemon_init();
1682 audiod_get_socket(); /* doesn't return on errors */
1683 audiod_mainloop();
1684 }