chiark / gitweb /
record whether tracks are connected to speaker in a sane and working way
[disorder] / server / speaker.c
CommitLineData
460b9539 1/*
2 * This file is part of DisOrder
dea8f8aa 3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
460b9539 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
1674096e 20/** @file server/speaker.c
cf714d85 21 * @brief Speaker process
1674096e 22 *
23 * This program is responsible for transmitting a single coherent audio stream
24 * to its destination (over the network, to some sound API, to some
42829e58
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25 * subprocess). It receives connections from decoders (or rather from the
26 * process that is about to become disorder-normalize) and plays them in the
27 * right order.
1674096e 28 *
795192f4 29 * @b Encodings. For the <a href="http://www.alsa-project.org/">ALSA</a> API,
30 * 8- and 16- bit stereo and mono are supported, with any sample rate (within
31 * the limits that ALSA can deal with.)
1674096e 32 *
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33 * Inbound data is expected to match @c config->sample_format. In normal use
34 * this is arranged by the @c disorder-normalize program (see @ref
35 * server/normalize.c).
1674096e 36 *
795192f4 37 * @b Garbage @b Collection. This program deliberately does not use the
38 * garbage collector even though it might be convenient to do so. This is for
39 * two reasons. Firstly some sound APIs use thread threads and we do not want
40 * to have to deal with potential interactions between threading and garbage
41 * collection. Secondly this process needs to be able to respond quickly and
42 * this is not compatible with the collector hanging the program even
43 * relatively briefly.
44 *
45 * @b Units. This program thinks at various times in three different units.
46 * Bytes are obvious. A sample is a single sample on a single channel. A
47 * frame is several samples on different channels at the same point in time.
48 * So (for instance) a 16-bit stereo frame is 4 bytes and consists of a pair of
49 * 2-byte samples.
1674096e 50 */
460b9539 51
52#include <config.h>
53#include "types.h"
54
55#include <getopt.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <locale.h>
59#include <syslog.h>
60#include <unistd.h>
61#include <errno.h>
62#include <ao/ao.h>
63#include <string.h>
64#include <assert.h>
65#include <sys/select.h>
9d5da576 66#include <sys/wait.h>
460b9539 67#include <time.h>
8023f60b 68#include <fcntl.h>
69#include <poll.h>
84aa9f93 70#include <sys/un.h>
460b9539 71
72#include "configuration.h"
73#include "syscalls.h"
74#include "log.h"
75#include "defs.h"
76#include "mem.h"
ea410ba1 77#include "speaker-protocol.h"
460b9539 78#include "user.h"
cf714d85 79#include "speaker.h"
460b9539 80
cf714d85 81/** @brief Linked list of all prepared tracks */
82struct track *tracks;
e83d0967 83
cf714d85 84/** @brief Playing track, or NULL */
85struct track *playing;
460b9539 86
1c3f1e73 87/** @brief Number of bytes pre frame */
6d2d327c 88size_t bpf;
1c3f1e73 89
90/** @brief Array of file descriptors for poll() */
91struct pollfd fds[NFDS];
92
93/** @brief Next free slot in @ref fds */
94int fdno;
95
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96/** @brief Listen socket */
97static int listenfd;
98
460b9539 99static time_t last_report; /* when we last reported */
100static int paused; /* pause status */
50ae38dd 101
5a7c42a8 102/** @brief The current device state */
103enum device_states device_state;
50ae38dd 104
55f35f2d 105/** @brief Set when idled
106 *
107 * This is set when the sound device is deliberately closed by idle().
55f35f2d 108 */
1c3f1e73 109int idled;
460b9539 110
29601377 111/** @brief Selected backend */
112static const struct speaker_backend *backend;
113
460b9539 114static const struct option options[] = {
115 { "help", no_argument, 0, 'h' },
116 { "version", no_argument, 0, 'V' },
117 { "config", required_argument, 0, 'c' },
118 { "debug", no_argument, 0, 'd' },
119 { "no-debug", no_argument, 0, 'D' },
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120 { "syslog", no_argument, 0, 's' },
121 { "no-syslog", no_argument, 0, 'S' },
460b9539 122 { 0, 0, 0, 0 }
123};
124
125/* Display usage message and terminate. */
126static void help(void) {
127 xprintf("Usage:\n"
128 " disorder-speaker [OPTIONS]\n"
129 "Options:\n"
130 " --help, -h Display usage message\n"
131 " --version, -V Display version number\n"
132 " --config PATH, -c PATH Set configuration file\n"
133 " --debug, -d Turn on debugging\n"
0ca6d097 134 " --[no-]syslog Force logging\n"
460b9539 135 "\n"
136 "Speaker process for DisOrder. Not intended to be run\n"
137 "directly.\n");
138 xfclose(stdout);
139 exit(0);
140}
141
142/* Display version number and terminate. */
143static void version(void) {
144 xprintf("disorder-speaker version %s\n", disorder_version_string);
145 xfclose(stdout);
146 exit(0);
147}
148
1674096e 149/** @brief Return the number of bytes per frame in @p format */
6d2d327c 150static size_t bytes_per_frame(const struct stream_header *format) {
460b9539 151 return format->channels * format->bits / 8;
152}
153
1674096e 154/** @brief Find track @p id, maybe creating it if not found */
460b9539 155static struct track *findtrack(const char *id, int create) {
156 struct track *t;
157
158 D(("findtrack %s %d", id, create));
159 for(t = tracks; t && strcmp(id, t->id); t = t->next)
160 ;
161 if(!t && create) {
162 t = xmalloc(sizeof *t);
163 t->next = tracks;
164 strcpy(t->id, id);
165 t->fd = -1;
166 tracks = t;
460b9539 167 }
168 return t;
169}
170
1674096e 171/** @brief Remove track @p id (but do not destroy it) */
460b9539 172static struct track *removetrack(const char *id) {
173 struct track *t, **tt;
174
175 D(("removetrack %s", id));
176 for(tt = &tracks; (t = *tt) && strcmp(id, t->id); tt = &t->next)
177 ;
178 if(t)
179 *tt = t->next;
180 return t;
181}
182
1674096e 183/** @brief Destroy a track */
460b9539 184static void destroy(struct track *t) {
185 D(("destroy %s", t->id));
186 if(t->fd != -1) xclose(t->fd);
460b9539 187 free(t);
188}
189
1674096e 190/** @brief Read data into a sample buffer
191 * @param t Pointer to track
192 * @return 0 on success, -1 on EOF
193 *
55f35f2d 194 * This is effectively the read callback on @c t->fd. It is called from the
195 * main loop whenever the track's file descriptor is readable, assuming the
196 * buffer has not reached the maximum allowed occupancy.
1674096e 197 */
460b9539 198static int fill(struct track *t) {
199 size_t where, left;
200 int n;
201
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202 D(("fill %s: eof=%d used=%zu",
203 t->id, t->eof, t->used));
460b9539 204 if(t->eof) return -1;
6d2d327c 205 if(t->used < sizeof t->buffer) {
460b9539 206 /* there is room left in the buffer */
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207 where = (t->start + t->used) % sizeof t->buffer;
208 /* Get as much data as we can */
209 if(where >= t->start) left = (sizeof t->buffer) - where;
210 else left = t->start - where;
460b9539 211 do {
212 n = read(t->fd, t->buffer + where, left);
213 } while(n < 0 && errno == EINTR);
214 if(n < 0) {
215 if(errno != EAGAIN) fatal(errno, "error reading sample stream");
216 return 0;
217 }
218 if(n == 0) {
219 D(("fill %s: eof detected", t->id));
220 t->eof = 1;
221 return -1;
222 }
223 t->used += n;
460b9539 224 }
225 return 0;
226}
227
55f35f2d 228/** @brief Close the sound device
229 *
230 * This is called to deactivate the output device when pausing, and also by the
231 * ALSA backend when changing encoding (in which case the sound device will be
232 * immediately reactivated).
233 */
460b9539 234static void idle(void) {
460b9539 235 D(("idle"));
5a7c42a8 236 if(backend->deactivate)
b5a99ad0 237 backend->deactivate();
5a7c42a8 238 else
239 device_state = device_closed;
e83d0967 240 idled = 1;
460b9539 241}
242
1674096e 243/** @brief Abandon the current track */
1c3f1e73 244void abandon(void) {
460b9539 245 struct speaker_message sm;
246
247 D(("abandon"));
248 memset(&sm, 0, sizeof sm);
249 sm.type = SM_FINISHED;
250 strcpy(sm.id, playing->id);
84aa9f93 251 speaker_send(1, &sm);
460b9539 252 removetrack(playing->id);
253 destroy(playing);
254 playing = 0;
1c6e6a61 255}
256
1674096e 257/** @brief Enable sound output
258 *
259 * Makes sure the sound device is open and has the right sample format. Return
260 * 0 on success and -1 on error.
261 */
5a7c42a8 262static void activate(void) {
6d2d327c 263 if(backend->activate)
5a7c42a8 264 backend->activate();
6d2d327c 265 else
5a7c42a8 266 device_state = device_open;
460b9539 267}
268
55f35f2d 269/** @brief Check whether the current track has finished
270 *
271 * The current track is determined to have finished either if the input stream
272 * eded before the format could be determined (i.e. it is malformed) or the
273 * input is at end of file and there is less than a frame left unplayed. (So
274 * it copes with decoders that crash mid-frame.)
275 */
460b9539 276static void maybe_finished(void) {
277 if(playing
278 && playing->eof
6d2d327c 279 && playing->used < bytes_per_frame(&config->sample_format))
460b9539 280 abandon();
281}
282
5a7c42a8 283/** @brief Play up to @p frames frames of audio
284 *
285 * It is always safe to call this function.
286 * - If @ref playing is 0 then it will just return
287 * - If @ref paused is non-0 then it will just return
288 * - If @ref device_state != @ref device_open then it will call activate() and
289 * return if it it fails.
290 * - If there is not enough audio to play then it play what is available.
291 *
292 * If there are not enough frames to play then whatever is available is played
293 * instead. It is up to mainloop() to ensure that play() is not called when
294 * unreasonably only an small amounts of data is available to play.
295 */
460b9539 296static void play(size_t frames) {
3c68b773 297 size_t avail_frames, avail_bytes, written_frames;
9d5da576 298 ssize_t written_bytes;
460b9539 299
5a7c42a8 300 /* Make sure there's a track to play and it is not pasued */
301 if(!playing || paused)
460b9539 302 return;
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303 /* Make sure the output device is open */
304 if(device_state != device_open) {
5a7c42a8 305 activate();
306 if(device_state != device_open)
307 return;
460b9539 308 }
6d2d327c 309 D(("play: play %zu/%zu%s %dHz %db %dc", frames, playing->used / bpf,
460b9539 310 playing->eof ? " EOF" : "",
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311 config->sample_format.rate,
312 config->sample_format.bits,
313 config->sample_format.channels));
460b9539 314 /* Figure out how many frames there are available to write */
6d2d327c 315 if(playing->start + playing->used > sizeof playing->buffer)
7f9d5847 316 /* The ring buffer is currently wrapped, only play up to the wrap point */
6d2d327c 317 avail_bytes = (sizeof playing->buffer) - playing->start;
460b9539 318 else
7f9d5847 319 /* The ring buffer is not wrapped, can play the lot */
460b9539 320 avail_bytes = playing->used;
6d2d327c 321 avail_frames = avail_bytes / bpf;
7f9d5847 322 /* Only play up to the requested amount */
323 if(avail_frames > frames)
324 avail_frames = frames;
325 if(!avail_frames)
326 return;
3c68b773 327 /* Play it, Sam */
328 written_frames = backend->play(avail_frames);
6d2d327c 329 written_bytes = written_frames * bpf;
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330 /* written_bytes and written_frames had better both be set and correct by
331 * this point */
460b9539 332 playing->start += written_bytes;
333 playing->used -= written_bytes;
334 playing->played += written_frames;
335 /* If the pointer is at the end of the buffer (or the buffer is completely
336 * empty) wrap it back to the start. */
6d2d327c 337 if(!playing->used || playing->start == (sizeof playing->buffer))
460b9539 338 playing->start = 0;
339 frames -= written_frames;
5a7c42a8 340 return;
460b9539 341}
342
343/* Notify the server what we're up to. */
344static void report(void) {
345 struct speaker_message sm;
346
6d2d327c 347 if(playing) {
460b9539 348 memset(&sm, 0, sizeof sm);
349 sm.type = paused ? SM_PAUSED : SM_PLAYING;
350 strcpy(sm.id, playing->id);
6d2d327c 351 sm.data = playing->played / config->sample_format.rate;
84aa9f93 352 speaker_send(1, &sm);
460b9539 353 }
354 time(&last_report);
355}
356
9d5da576 357static void reap(int __attribute__((unused)) sig) {
e83d0967 358 pid_t cmdpid;
9d5da576 359 int st;
360
361 do
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362 cmdpid = waitpid(-1, &st, WNOHANG);
363 while(cmdpid > 0);
9d5da576 364 signal(SIGCHLD, reap);
365}
366
1c3f1e73 367int addfd(int fd, int events) {
460b9539 368 if(fdno < NFDS) {
369 fds[fdno].fd = fd;
370 fds[fdno].events = events;
371 return fdno++;
372 } else
373 return -1;
374}
375
572d74ba 376/** @brief Table of speaker backends */
1c3f1e73 377static const struct speaker_backend *backends[] = {
146e86fb 378#if HAVE_ALSA_ASOUNDLIB_H
1c3f1e73 379 &alsa_backend,
572d74ba 380#endif
1c3f1e73 381 &command_backend,
382 &network_backend,
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383#if HAVE_COREAUDIO_AUDIOHARDWARE_H
384 &coreaudio_backend,
385#endif
e99d42b1 386#if HAVE_SYS_SOUNDCARD_H
387 &oss_backend,
388#endif
1c3f1e73 389 0
572d74ba 390};
391
5a7c42a8 392/** @brief Return nonzero if we want to play some audio
55f35f2d 393 *
5a7c42a8 394 * We want to play audio if there is a current track; and it is not paused; and
395 * there are at least @ref FRAMES frames of audio to play, or we are in sight
396 * of the end of the current track.
55f35f2d 397 */
5a7c42a8 398static int playable(void) {
399 return playing
400 && !paused
401 && (playing->used >= FRAMES || playing->eof);
402}
403
404/** @brief Main event loop */
55f35f2d 405static void mainloop(void) {
572d74ba 406 struct track *t;
407 struct speaker_message sm;
84aa9f93 408 int n, fd, stdin_slot, timeout, listen_slot;
460b9539 409
460b9539 410 while(getppid() != 1) {
411 fdno = 0;
5a7c42a8 412 /* By default we will wait up to a second before thinking about current
413 * state. */
414 timeout = 1000;
460b9539 415 /* Always ready for commands from the main server. */
416 stdin_slot = addfd(0, POLLIN);
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417 /* Also always ready for inbound connections */
418 listen_slot = addfd(listenfd, POLLIN);
460b9539 419 /* Try to read sample data for the currently playing track if there is
420 * buffer space. */
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421 if(playing
422 && playing->fd >= 0
423 && !playing->eof
424 && playing->used < (sizeof playing->buffer))
460b9539 425 playing->slot = addfd(playing->fd, POLLIN);
5a7c42a8 426 else if(playing)
460b9539 427 playing->slot = -1;
5a7c42a8 428 if(playable()) {
429 /* We want to play some audio. If the device is closed then we attempt
430 * to open it. */
431 if(device_state == device_closed)
432 activate();
433 /* If the device is (now) open then we will wait up until it is ready for
434 * more. If something went wrong then we should have device_error
435 * instead, but the post-poll code will cope even if it's
436 * device_closed. */
437 if(device_state == device_open)
e84fb5f0 438 backend->beforepoll(&timeout);
5a7c42a8 439 }
460b9539 440 /* If any other tracks don't have a full buffer, try to read sample data
5a7c42a8 441 * from them. We do this last of all, so that if we run out of slots,
442 * nothing important can't be monitored. */
460b9539 443 for(t = tracks; t; t = t->next)
444 if(t != playing) {
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445 if(t->fd >= 0
446 && !t->eof
447 && t->used < sizeof t->buffer) {
9d5da576 448 t->slot = addfd(t->fd, POLLIN | POLLHUP);
460b9539 449 } else
450 t->slot = -1;
451 }
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452 /* Wait for something interesting to happen */
453 n = poll(fds, fdno, timeout);
460b9539 454 if(n < 0) {
455 if(errno == EINTR) continue;
456 fatal(errno, "error calling poll");
457 }
458 /* Play some sound before doing anything else */
5a7c42a8 459 if(playable()) {
460 /* We want to play some audio */
461 if(device_state == device_open) {
462 if(backend->ready())
463 play(3 * FRAMES);
464 } else {
465 /* We must be in _closed or _error, and it should be the latter, but we
466 * cope with either.
467 *
468 * We most likely timed out, so now is a good time to retry. play()
469 * knows to re-activate the device if necessary.
470 */
471 play(3 * FRAMES);
472 }
460b9539 473 }
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474 /* Perhaps a connection has arrived */
475 if(fds[listen_slot].revents & POLLIN) {
476 struct sockaddr_un addr;
477 socklen_t addrlen = sizeof addr;
478 uint32_t l;
479 char id[24];
480
dc450d30 481 if((fd = accept(listenfd, (struct sockaddr *)&addr, &addrlen)) >= 0) {
937be4c0 482 blocking(fd);
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483 if(read(fd, &l, sizeof l) < 4) {
484 error(errno, "reading length from inbound connection");
485 xclose(fd);
486 } else if(l >= sizeof id) {
487 error(0, "id length too long");
488 xclose(fd);
489 } else if(read(fd, id, l) < (ssize_t)l) {
490 error(errno, "reading id from inbound connection");
491 xclose(fd);
492 } else {
493 id[l] = 0;
494 D(("id %s fd %d", id, fd));
495 t = findtrack(id, 1/*create*/);
496 write(fd, "", 1); /* write an ack */
497 if(t->fd != -1) {
66bb2e02 498 error(0, "%s: already got a connection", id);
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499 xclose(fd);
500 } else {
501 nonblock(fd);
502 t->fd = fd; /* yay */
503 }
504 }
505 } else
506 error(errno, "accept");
507 }
460b9539 508 /* Perhaps we have a command to process */
509 if(fds[stdin_slot].revents & POLLIN) {
5a7c42a8 510 /* There might (in theory) be several commands queued up, but in general
511 * this won't be the case, so we don't bother looping around to pick them
512 * all up. */
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513 n = speaker_recv(0, &sm);
514 /* TODO */
460b9539 515 if(n > 0)
516 switch(sm.type) {
460b9539 517 case SM_PLAY:
460b9539 518 if(playing) fatal(0, "got SM_PLAY but already playing something");
519 t = findtrack(sm.id, 1);
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520 D(("SM_PLAY %s fd %d", t->id, t->fd));
521 if(t->fd == -1)
522 error(0, "cannot play track because no connection arrived");
460b9539 523 playing = t;
5a7c42a8 524 /* We attempt to play straight away rather than going round the loop.
525 * play() is clever enough to perform any activation that is
526 * required. */
527 play(3 * FRAMES);
460b9539 528 report();
529 break;
530 case SM_PAUSE:
531 D(("SM_PAUSE"));
532 paused = 1;
533 report();
534 break;
535 case SM_RESUME:
536 D(("SM_RESUME"));
537 if(paused) {
538 paused = 0;
5a7c42a8 539 /* As for SM_PLAY we attempt to play straight away. */
460b9539 540 if(playing)
5a7c42a8 541 play(3 * FRAMES);
460b9539 542 }
543 report();
544 break;
545 case SM_CANCEL:
546 D(("SM_CANCEL %s", sm.id));
547 t = removetrack(sm.id);
548 if(t) {
549 if(t == playing) {
550 sm.type = SM_FINISHED;
551 strcpy(sm.id, playing->id);
84aa9f93 552 speaker_send(1, &sm);
460b9539 553 playing = 0;
554 }
555 destroy(t);
556 } else
557 error(0, "SM_CANCEL for unknown track %s", sm.id);
558 report();
559 break;
560 case SM_RELOAD:
561 D(("SM_RELOAD"));
c00fce3a 562 if(config_read(1)) error(0, "cannot read configuration");
460b9539 563 info("reloaded configuration");
564 break;
565 default:
566 error(0, "unknown message type %d", sm.type);
567 }
568 }
569 /* Read in any buffered data */
570 for(t = tracks; t; t = t->next)
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571 if(t->fd != -1
572 && t->slot != -1
573 && (fds[t->slot].revents & (POLLIN | POLLHUP)))
460b9539 574 fill(t);
460b9539 575 /* Maybe we finished playing a track somewhere in the above */
576 maybe_finished();
577 /* If we don't need the sound device for now then close it for the benefit
578 * of anyone else who wants it. */
5a7c42a8 579 if((!playing || paused) && device_state == device_open)
460b9539 580 idle();
581 /* If we've not reported out state for a second do so now. */
582 if(time(0) > last_report)
583 report();
584 }
55f35f2d 585}
586
587int main(int argc, char **argv) {
0ca6d097 588 int n, logsyslog = !isatty(2);
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589 struct sockaddr_un addr;
590 static const int one = 1;
937be4c0 591 struct speaker_message sm;
38b8221f 592 const char *d;
55f35f2d 593
594 set_progname(argv);
595 if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
0ca6d097 596 while((n = getopt_long(argc, argv, "hVc:dDSs", options, 0)) >= 0) {
55f35f2d 597 switch(n) {
598 case 'h': help();
599 case 'V': version();
600 case 'c': configfile = optarg; break;
601 case 'd': debugging = 1; break;
602 case 'D': debugging = 0; break;
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603 case 'S': logsyslog = 0; break;
604 case 's': logsyslog = 1; break;
55f35f2d 605 default: fatal(0, "invalid option");
606 }
607 }
38b8221f 608 if((d = getenv("DISORDER_DEBUG_SPEAKER"))) debugging = atoi(d);
0ca6d097 609 if(logsyslog) {
55f35f2d 610 openlog(progname, LOG_PID, LOG_DAEMON);
611 log_default = &log_syslog;
612 }
c00fce3a 613 if(config_read(1)) fatal(0, "cannot read configuration");
6d2d327c 614 bpf = bytes_per_frame(&config->sample_format);
55f35f2d 615 /* ignore SIGPIPE */
616 signal(SIGPIPE, SIG_IGN);
617 /* reap kids */
618 signal(SIGCHLD, reap);
619 /* set nice value */
620 xnice(config->nice_speaker);
621 /* change user */
622 become_mortal();
623 /* make sure we're not root, whatever the config says */
624 if(getuid() == 0 || geteuid() == 0) fatal(0, "do not run as root");
625 /* identify the backend used to play */
1c3f1e73 626 for(n = 0; backends[n]; ++n)
627 if(backends[n]->backend == config->speaker_backend)
55f35f2d 628 break;
1c3f1e73 629 if(!backends[n])
55f35f2d 630 fatal(0, "unsupported backend %d", config->speaker_backend);
1c3f1e73 631 backend = backends[n];
55f35f2d 632 /* backend-specific initialization */
633 backend->init();
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634 /* set up the listen socket */
635 listenfd = xsocket(PF_UNIX, SOCK_STREAM, 0);
636 memset(&addr, 0, sizeof addr);
637 addr.sun_family = AF_UNIX;
638 snprintf(addr.sun_path, sizeof addr.sun_path, "%s/speaker",
639 config->home);
640 if(unlink(addr.sun_path) < 0 && errno != ENOENT)
641 error(errno, "removing %s", addr.sun_path);
642 xsetsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
dc450d30 643 if(bind(listenfd, (const struct sockaddr *)&addr, sizeof addr) < 0)
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644 fatal(errno, "error binding socket to %s", addr.sun_path);
645 xlisten(listenfd, 128);
646 nonblock(listenfd);
647 info("listening on %s", addr.sun_path);
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648 memset(&sm, 0, sizeof sm);
649 sm.type = SM_READY;
650 speaker_send(1, &sm);
55f35f2d 651 mainloop();
460b9539 652 info("stopped (parent terminated)");
653 exit(0);
654}
655
656/*
657Local Variables:
658c-basic-offset:2
659comment-column:40
660fill-column:79
661indent-tabs-mode:nil
662End:
663*/