audiod.c

   1 /*
   2  * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file audiod.c the paraslash's audio daemon */
   8 #include <regex.h>
   9 #include <sys/types.h>
  10 #include <signal.h>
  11 #include <stdbool.h>
  12
  13 #include "para.h"
  14 #include "error.h"
  15 #include "crypt.h"
  16 #include "audiod.cmdline.h"
  17 #include "list.h"
  18 #include "sched.h"
  19 #include "ggo.h"
  20 #include "recv.h"
  21 #include "buffer_tree.h"
  22 #include "filter.h"
  23 #include "grab_client.h"
  24 #include "client.cmdline.h"
  25 #include "client.h"
  26 #include "audiod.h"
  27 #include "net.h"
  28 #include "daemon.h"
  29 #include "string.h"
  30 #include "fd.h"
  31 #include "write.h"
  32 #include "write_common.h"
  33 #include "signal.h"
  34 #include "version.h"
  35
  36 /** define the array of error lists needed by para_audiod */
  37 INIT_AUDIOD_ERRLISTS;
  38 /** define the array containing all supported audio formats */
  39 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
  40
  41 /** Defines how audiod handles one supported audio format. */
  42 struct audio_format_info {
  43         /** pointer to the receiver for this audio format */
  44         struct receiver *receiver;
  45         /** the receiver configuration */
  46         void *receiver_conf;
  47         /** the number of filters that should be activated for this audio format */
  48         unsigned int num_filters;
  49         /** Array of filter numbers to be activated. */
  50         unsigned *filter_nums;
  51         /** Pointer to the array of filter configurations. */
  52         void **filter_conf;
  53         /** the number of filters that should be activated for this audio format */
  54         unsigned int num_writers;
  55         /** Array of writer numbers to be activated. */
  56         int *writer_nums;
  57         /** pointer to the array of writer configurations */
  58         void **writer_conf;
  59         /** do not start receiver/filters/writer before this time */
  60         struct timeval restart_barrier;
  61 };
  62
  63 /**
  64  * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
  65  * be associated with a receiver/filter/writer triple. This array holds all
  66  * information on the status of these slots.
  67  *
  68  * \sa struct slot_info
  69  * */
  70 struct slot_info slot[MAX_STREAM_SLOTS];
  71
  72 /** The vss status flags audiod is interested in. */
  73 enum vss_status_flags {
  74         /** Whether the 'N' flag is set. */
  75         VSS_STATUS_FLAG_NEXT = 1,
  76         /** The 'P' flag is set. */
  77         VSS_STATUS_FLAG_PLAYING = 2,
  78 };
  79
  80 /**
  81  * The task for obtaining para_server's status (para_client stat).
  82  *
  83  * \sa struct task, struct sched.
  84  */
  85 struct status_task {
  86         /** The associated task structure of audiod. */
  87         struct task task;
  88         /** Client data associated with the stat task. */
  89         struct client_task *ct;
  90         /** Do not restart client command until this time. */
  91         struct timeval restart_barrier;
  92         /** Last time we received status data from para_server. */
  93         struct timeval last_status_read;
  94         size_t min_iqs;
  95         /** The offset value announced by para_server. */
  96         int offset_seconds;
  97         /** The length of the current audio file as announced by para_server. */
  98         int length_seconds;
  99         /** The start of the current stream from the view of para_server. */
 100         struct timeval server_stream_start;
 101         /** The average time deviation between para_server and para_audiod. */
 102         struct timeval sa_time_diff;
 103         /** Whether client time is ahead of server time. */
 104         int sa_time_diff_sign;
 105         /** The 'P' and the 'N' flags as announced by para_server. */
 106         enum vss_status_flags vss_status;
 107         /** Number of times the clock difference is to be checked. */
 108         unsigned clock_diff_count;
 109         /** When to start the next check for clock difference. */
 110         struct timeval clock_diff_barrier;
 111         /** Number of the audio format as announced by para_server. */
 112         int current_audio_format_num;
 113         /* The status task btrn is the child of the client task. */
 114         struct btr_node *btrn;
 115 };
 116
 117 /** The array of status items sent by para_server. */
 118 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 119
 120 /**
 121  * the current mode of operation of which can be changed by the on/off/cycle
 122  * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
 123  */
 124 int audiod_status = AUDIOD_ON;
 125
 126 /**
 127  * the gengetopt args_info struct that holds information on all command line
 128  * arguments
 129  */
 130 struct audiod_args_info conf;
 131
 132 static char *socket_name;
 133 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 134
 135 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
 136
 137 static struct status_task status_task_struct;
 138
 139 /**
 140  * the task that calls the status command of para_server
 141  *
 142  * \sa struct status_task
 143  */
 144 static struct status_task *stat_task = &status_task_struct;
 145
 146 /**
 147  * the task for handling audiod commands
 148  *
 149  * \sa struct task, struct sched
 150  */
 151 struct command_task {
 152         /** the local listening socket */
 153         int fd;
 154         /** the associated task structure */
 155         struct task task;
 156 };
 157
 158 /** iterate over all supported audio formats */
 159 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 160
 161 /**
 162  * Get the audio format number.
 163  *
 164  * \param name The name of the audio format.
 165  *
 166  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
 167  * \a name is not a supported audio format.
 168  */
 169 static int get_audio_format_num(const char *name)
 170 {
 171         int i;
 172
 173         while (para_isspace(*name))
 174                 name++;
 175         FOR_EACH_AUDIO_FORMAT(i)
 176                 if (!strcmp(name, audio_formats[i]))
 177                         return i;
 178         return -E_UNSUPPORTED_AUDIO_FORMAT;
 179 }
 180
 181 /**
 182  * Compute the play time based on information of the given slot.
 183  *
 184  * \param slot_num The slot number (negative means: no slot).
 185  *
 186  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 187  * from the status items received from para_server and the start time of the
 188  * (first) writer of the given slot.
 189  *
 190  * It has to to take into account that probably the stream was not started at
 191  * the beginning of the file, that the clock between the server and the client
 192  * host may differ and that playback of the stream was delayed, e.g. because
 193  * the prebuffer filter is used in the filter configuration of the given slot.
 194  *
 195  * If no writer is active in the given slot, or \a slot_num is negative
 196  * (indicating that para_audiod runs in standby mode), an approximation based
 197  * only on the status items is computed and the returned string is prefixed
 198  * with "~".
 199  *
 200  * \return A string that must be freed by the caller.
 201  */
 202 char *get_time_string(int slot_num)
 203 {
 204         int ret, seconds = 0, length;
 205         struct timeval *tmp, sum, sss, /* server stream start */
 206                 rstime, /* receiver start time */
 207                 wstime, /* writer start time */
 208                 wtime, /* now - writer start */
 209                 rskip; /* receiver start - sss */
 210         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 211         char *msg;
 212
 213         if (audiod_status == AUDIOD_OFF)
 214                 goto empty;
 215         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 216                 if (stat_task->length_seconds) /* paused */
 217                         return NULL;
 218                 goto empty; /* stopped */
 219         }
 220         if (audiod_status == AUDIOD_ON && !s)
 221                 goto empty;
 222         /*
 223          * Valid status items and playing, set length and tmp to the stream
 224          * start. We use the slot info and fall back to the info from current
 225          * status items if no slot info is available.
 226          */
 227         length = stat_task->length_seconds;
 228         tmp = &stat_task->server_stream_start;
 229         if (s && s->wns) { /* writer active in this slot */
 230                 btr_get_node_start(s->wns[0].btrn, &wstime);
 231                 if (wstime.tv_sec != 0) { /* writer wrote something */
 232                         if (s->server_stream_start.tv_sec == 0) {
 233                                 /* copy status info to slot */
 234                                 s->server_stream_start = stat_task->server_stream_start;
 235                                 s->offset_seconds = stat_task->offset_seconds;
 236                                 s->seconds_total = stat_task->length_seconds;
 237                         }
 238                         length = s->seconds_total;
 239                         tmp = &s->server_stream_start;
 240                 }
 241         }
 242         if (stat_task->sa_time_diff_sign > 0)
 243                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 244         else
 245                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 246         if (!s || !s->wns) {
 247                 struct timeval diff;
 248                 tv_diff(now, &sss, &diff);
 249                 seconds = diff.tv_sec + stat_task->offset_seconds;
 250                 goto out;
 251         }
 252         tv_diff(now, &wstime, &wtime);
 253         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 254         seconds = s->offset_seconds;
 255         btr_get_node_start(s->receiver_node->btrn, &rstime);
 256         ret = tv_diff(&rstime, &sss, &rskip);
 257         if (ret > 0) { /* audiod was started in the middle of the stream */
 258                 tv_add(&wtime, &rskip, &sum);
 259                 seconds += sum.tv_sec;
 260         } else
 261                 seconds += wtime.tv_sec;
 262 out:
 263         seconds = PARA_MIN(seconds, length);
 264         seconds = PARA_MAX(seconds, 0);
 265         msg = make_message(
 266                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 267                 s? "" : "~",
 268                 seconds / 60,
 269                 seconds % 60,
 270                 (length - seconds) / 60,
 271                 (length - seconds) % 60,
 272                 length? (seconds * 100 + length / 2) / length : 0,
 273                 length / 60,
 274                 length % 60
 275         );
 276         PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 277         return msg;
 278 empty:
 279         return para_strdup(NULL);
 280 }
 281
 282 static int want_colors(void)
 283 {
 284         if (conf.color_arg == color_arg_no)
 285                 return 0;
 286         if (conf.color_arg == color_arg_yes)
 287                 return 1;
 288         if (conf.logfile_given)
 289                 return 0;
 290         return isatty(STDERR_FILENO);
 291 }
 292
 293 static void parse_config_or_die(void)
 294 {
 295         int ret;
 296         char *config_file;
 297         struct audiod_cmdline_parser_params params = {
 298                 .override = 0,
 299                 .initialize = 0,
 300                 .check_required = 1,
 301                 .check_ambiguity = 0,
 302                 .print_errors = 1
 303         };
 304
 305         if (conf.config_file_given)
 306                 config_file = para_strdup(conf.config_file_arg);
 307         else {
 308                 char *home = para_homedir();
 309                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 310                 free(home);
 311         }
 312         ret = file_exists(config_file);
 313         if (conf.config_file_given && !ret) {
 314                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 315                 goto err;
 316         }
 317         if (ret)
 318                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 319         free(config_file);
 320         daemon_set_loglevel(conf.loglevel_arg);
 321         return;
 322 err:
 323         free(config_file);
 324         exit(EXIT_FAILURE);
 325 }
 326
 327 static void setup_signal_handling(void)
 328 {
 329         sig_task->fd = para_signal_init();
 330         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 331         para_install_sighandler(SIGINT);
 332         para_install_sighandler(SIGTERM);
 333         para_install_sighandler(SIGHUP);
 334         para_sigaction(SIGPIPE, SIG_IGN);
 335 }
 336
 337 static void clear_slot(int slot_num)
 338 {
 339         struct slot_info *s = &slot[slot_num];
 340
 341         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 342         memset(s, 0, sizeof(struct slot_info));
 343         s->format = -1;
 344 }
 345
 346 static void close_receiver(int slot_num)
 347 {
 348         struct slot_info *s = &slot[slot_num];
 349         struct audio_format_info *a;
 350
 351         if (s->format < 0 || !s->receiver_node)
 352                 return;
 353         a = &afi[s->format];
 354         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 355                 audio_formats[s->format], slot_num);
 356         a->receiver->close(s->receiver_node);
 357         btr_free_node(s->receiver_node->btrn);
 358         free(s->receiver_node);
 359         s->receiver_node = NULL;
 360         tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
 361                 &a->restart_barrier);
 362 }
 363
 364 static void writer_cleanup(struct writer_node *wn)
 365 {
 366         struct writer *w;
 367
 368         if (!wn)
 369                 return;
 370         w = writers + wn->writer_num;
 371         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 372         w->close(wn);
 373         btr_free_node(wn->btrn);
 374 }
 375
 376 static void close_writers(struct slot_info *s)
 377 {
 378         struct audio_format_info *a;
 379         int i;
 380
 381         if (s->format < 0)
 382                 return;
 383         assert(s->wns);
 384         a = afi + s->format;
 385         if (a->num_writers == 0)
 386                 writer_cleanup(s->wns);
 387         else {
 388                 for (i = 0; i < a->num_writers; i++)
 389                         writer_cleanup(s->wns + i);
 390         }
 391         free(s->wns);
 392         s->wns = NULL;
 393 }
 394
 395 static void close_filters(struct slot_info *s)
 396 {
 397         int i;
 398         struct audio_format_info *a = afi + s->format;
 399         if (a->num_filters == 0)
 400                 return;
 401         for (i = 0; i < a->num_filters; i++) {
 402                 struct filter_node *fn = s->fns + i;
 403                 struct filter *f;
 404
 405                 if (!fn)
 406                         continue;
 407                 f = filters + fn->filter_num;
 408                 if (f->close)
 409                         f->close(fn);
 410                 btr_free_node(fn->btrn);
 411         }
 412         free(s->fns);
 413         s->fns = NULL;
 414 }
 415
 416 /*
 417  * Whenever a task commits suicide by returning from post_select with t->error
 418  * < 0, it also removes its btr node. We do exactly that to kill a running
 419  * task. Note that the scheduler checks t->error also _before_ each pre/post
 420  * select call, so the victim will never be scheduled again.
 421  */
 422 static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
 423 {
 424         if (t->error < 0)
 425                 return;
 426         t->error = error;
 427         btr_remove_node(btrn);
 428 }
 429
 430 static void kill_all_decoders(int error)
 431 {
 432         int i;
 433
 434         FOR_EACH_SLOT(i) {
 435                 struct slot_info *s = slot + i;
 436                 if (s->format < 0)
 437                         continue;
 438                 if (!s->receiver_node)
 439                         continue;
 440                 kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
 441                                 error);
 442         }
 443 }
 444
 445 static int get_empty_slot(void)
 446 {
 447         int i;
 448         struct slot_info *s;
 449
 450         FOR_EACH_SLOT(i) {
 451                 s = &slot[i];
 452                 if (s->format < 0) {
 453                         clear_slot(i);
 454                         return i;
 455                 }
 456                 if (s->wns || s->receiver_node || s->fns)
 457                         continue;
 458                 clear_slot(i);
 459                 return i;
 460         }
 461         return -E_NO_MORE_SLOTS;
 462 }
 463
 464 static void open_filters(struct slot_info *s)
 465 {
 466         struct audio_format_info *a = afi + s->format;
 467         struct filter_node *fn;
 468         int nf = a->num_filters;
 469         struct btr_node *parent;
 470         int i;
 471
 472         if (nf == 0)
 473                 return;
 474         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 475         assert(s->fns == NULL);
 476         s->fns = para_calloc(nf * sizeof(struct filter_node));
 477         parent = s->receiver_node->btrn;
 478         for (i = 0; i < nf; i++) {
 479                 struct filter *f = filters + a->filter_nums[i];
 480                 fn = s->fns + i;
 481                 fn->filter_num = a->filter_nums[i];
 482                 fn->conf = a->filter_conf[i];
 483                 fn->task.pre_select = f->pre_select;
 484                 fn->task.post_select = f->post_select;
 485
 486                 fn->btrn = btr_new_node(&(struct btr_node_description)
 487                         EMBRACE(.name = f->name, .parent = parent,
 488                                 .handler = f->execute, .context = fn));
 489
 490                 f->open(fn);
 491                 register_task(&fn->task);
 492                 parent = fn->btrn;
 493                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 494                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 495                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 496         }
 497 }
 498
 499 static void open_writers(struct slot_info *s)
 500 {
 501         int i;
 502         struct audio_format_info *a = afi + s->format;
 503         struct writer_node *wn;
 504         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 505
 506         assert(s->wns == NULL);
 507         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 508                 * sizeof(struct writer_node));
 509         if (a->num_writers == 0)
 510                 setup_writer_node(NULL, parent, s->wns);
 511         else {
 512                 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 513                 for (i = 0; i < a->num_writers; i++) {
 514                         wn = s->wns + i;
 515                         wn->conf = a->writer_conf[i];
 516                         wn->writer_num = a->writer_nums[i];
 517                         register_writer_node(wn, parent);
 518                 }
 519         }
 520 }
 521
 522 /* returns slot num on success */
 523 static int open_receiver(int format)
 524 {
 525         struct audio_format_info *a = &afi[format];
 526         struct slot_info *s;
 527         int ret, slot_num;
 528         struct receiver *r = a->receiver;
 529         struct receiver_node *rn;
 530
 531         tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
 532         ret = get_empty_slot();
 533         if (ret < 0)
 534                 return ret;
 535         slot_num = ret;
 536         rn = para_calloc(sizeof(*rn));
 537         rn->receiver = r;
 538         rn->conf = a->receiver_conf;
 539         rn->btrn = btr_new_node(&(struct btr_node_description)
 540                 EMBRACE(.name = r->name, .context = rn));
 541         ret = r->open(rn);
 542         if (ret < 0) {
 543                 btr_free_node(rn->btrn);
 544                 free(rn);
 545                 return ret;
 546         }
 547         s = &slot[slot_num];
 548         s->format = format;
 549         s->receiver_node = rn;
 550         PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
 551                 audio_formats[format], r->name, slot_num);
 552         rn->task.pre_select = r->pre_select;
 553         rn->task.post_select = r->post_select;
 554         sprintf(rn->task.status, "%s receiver node", r->name);
 555         register_task(&rn->task);
 556         return slot_num;
 557 }
 558
 559 static bool receiver_running(void)
 560 {
 561         int i;
 562         long unsigned ss1 = stat_task->server_stream_start.tv_sec;
 563
 564         FOR_EACH_SLOT(i) {
 565                 struct slot_info *s = &slot[i];
 566                 long unsigned ss2 = s->server_stream_start.tv_sec;
 567
 568                 if (!s->receiver_node)
 569                         continue;
 570                 if (s->receiver_node->task.error >= 0)
 571                         return true;
 572                 if (ss1 == ss2)
 573                         return true;
 574         }
 575         return false;
 576 }
 577
 578 /**
 579  * Return the root node of the current buffer tree.
 580  *
 581  * This is only used for stream grabbing.
 582  *
 583  * \return \p NULL if no slot is currently active. If more than one buffer tree
 584  * exists, the node corresponding to the most recently started receiver is
 585  * returned.
 586  */
 587 struct btr_node *audiod_get_btr_root(void)
 588 {
 589         int i, newest_slot = -1;
 590         struct timeval newest_rstime = {0, 0};
 591
 592         FOR_EACH_SLOT(i) {
 593                 struct slot_info *s = &slot[i];
 594                 struct timeval rstime;
 595                 if (!s->receiver_node)
 596                         continue;
 597                 if (s->receiver_node->task.error < 0)
 598                         continue;
 599                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 600                 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
 601                         continue;
 602                 newest_rstime = rstime;
 603                 newest_slot = i;
 604         }
 605         if (newest_slot == -1)
 606                 return NULL;
 607         return slot[newest_slot].receiver_node->btrn;
 608 }
 609
 610 /* whether a new instance of a decoder should be started. */
 611 static bool must_start_decoder(void)
 612 {
 613         int cafn = stat_task->current_audio_format_num;
 614         unsigned vs = stat_task->vss_status;
 615
 616         if (audiod_status != AUDIOD_ON)
 617                 return false;
 618         if (cafn < 0)
 619                 return false;
 620         if (!stat_task->ct)
 621                 return false;
 622         if (vs & VSS_STATUS_FLAG_NEXT)
 623                 return false;
 624         if (!(vs & VSS_STATUS_FLAG_PLAYING))
 625                 return false;
 626         if (receiver_running())
 627                 return false;
 628         if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
 629                 return false;
 630         return true;
 631 }
 632
 633 static unsigned compute_time_diff(const struct timeval *status_time)
 634 {
 635         struct timeval tmp, diff;
 636         static unsigned count;
 637         int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
 638         const struct timeval max_deviation = {0, 500 * 1000};
 639         const int time_smooth = 5;
 640
 641         if (!status_time)
 642                 return count;
 643         sign = tv_diff(status_time, now, &diff);
 644 //              PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
 645 //                      sign, sa_time_diff_sign);
 646         if (!count) {
 647                 sa_time_diff_sign = sign;
 648                 stat_task->sa_time_diff = diff;
 649                 count++;
 650                 goto out;
 651         }
 652         if (count > 5) {
 653                 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
 654                 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
 655                         PARA_WARNING_LOG("time diff jump: %lims\n",
 656                                 s * tv2ms(&tmp));
 657         }
 658         count++;
 659         sa_time_diff_sign = tv_convex_combination(
 660                 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
 661                 count > 10? sign : sign * time_smooth, &diff,
 662                 &tmp);
 663         stat_task->sa_time_diff = tmp;
 664         PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
 665                 sign < 0? "-" : "+",
 666                 tv2ms(&diff),
 667                 sa_time_diff_sign < 0? "-" : "+",
 668                 tv2ms(&stat_task->sa_time_diff)
 669         );
 670 out:
 671         stat_task->sa_time_diff_sign = sa_time_diff_sign;
 672         return count;
 673 }
 674
 675 static int update_item(int itemnum, char *buf)
 676 {
 677         long unsigned sec, usec;
 678
 679         if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
 680                 return 1;
 681         free(stat_item_values[itemnum]);
 682         stat_item_values[itemnum] = para_strdup(buf);
 683         stat_client_write_item(itemnum);
 684         switch (itemnum) {
 685         case SI_STATUS_FLAGS:
 686                 stat_task->vss_status = 0;
 687                 if (strchr(buf, 'N'))
 688                         stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
 689                 if (strchr(buf, 'P'))
 690                         stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
 691                 break;
 692         case SI_OFFSET:
 693                 stat_task->offset_seconds = atoi(buf);
 694                 break;
 695         case SI_SECONDS_TOTAL:
 696                 stat_task->length_seconds = atoi(buf);
 697                 break;
 698         case SI_STREAM_START:
 699                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 700                         stat_task->server_stream_start.tv_sec = sec;
 701                         stat_task->server_stream_start.tv_usec = usec;
 702                 }
 703                 break;
 704         case SI_CURRENT_TIME:
 705                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 706                         struct timeval tv = {sec, usec};
 707                         compute_time_diff(&tv);
 708                 }
 709                 break;
 710         case SI_FORMAT:
 711                 stat_task->current_audio_format_num
 712                         = get_audio_format_num(buf);
 713         }
 714         return 1;
 715 }
 716
 717 static int parse_stream_command(const char *txt, char **cmd)
 718 {
 719         char *p = strchr(txt, ':');
 720         int i;
 721
 722         if (!p)
 723                 return -E_MISSING_COLON;
 724         p++;
 725         FOR_EACH_AUDIO_FORMAT(i) {
 726                 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
 727                         continue;
 728                 *cmd = p;
 729                 return i;
 730         }
 731         return -E_UNSUPPORTED_AUDIO_FORMAT;
 732 }
 733
 734 static int add_filter(int format, char *cmdline)
 735 {
 736         struct audio_format_info *a = &afi[format];
 737         int filter_num, nf = a->num_filters;
 738
 739         filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
 740         if (filter_num < 0)
 741                 return filter_num;
 742         a->filter_nums[nf] = filter_num;
 743         a->num_filters++;
 744         PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
 745                 filters[filter_num].name);
 746         return filter_num;
 747 }
 748
 749 static int parse_writer_args(void)
 750 {
 751         int i, ret, nw;
 752         char *cmd;
 753         struct audio_format_info *a;
 754
 755         nw = PARA_MAX(1U, conf.writer_given);
 756         PARA_INFO_LOG("maximal number of writers: %d\n", nw);
 757         FOR_EACH_AUDIO_FORMAT(i) {
 758                 a = &afi[i];
 759                 a->writer_conf = para_malloc(nw * sizeof(void *));
 760                 a->writer_nums = para_malloc(nw * sizeof(int));
 761                 a->num_writers = 0;
 762         }
 763         for (i = 0; i < conf.writer_given; i++) {
 764                 void *wconf;
 765                 int writer_num;
 766                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 767                 if (ret < 0)
 768                         goto out;
 769                 a = &afi[ret];
 770                 nw = a->num_writers;
 771                 wconf = check_writer_arg(cmd, &writer_num);
 772                 if (!wconf) {
 773                         ret = writer_num;
 774                         goto out;
 775                 }
 776                 a->writer_nums[nw] = writer_num;
 777                 a->writer_conf[nw] = wconf;
 778                 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
 779                         nw, writer_names[writer_num]);
 780                 a->num_writers++;
 781         }
 782         ret = 1;
 783 out:
 784         return ret;
 785 }
 786
 787 static int parse_receiver_args(void)
 788 {
 789         int i, ret, receiver_num;
 790         char *cmd = NULL;
 791         struct audio_format_info *a;
 792
 793         for (i = conf.receiver_given - 1; i >= 0; i--) {
 794                 char *arg = conf.receiver_arg[i];
 795                 char *recv_arg = strchr(arg, ':');
 796                 ret = -E_MISSING_COLON;
 797                 if (!recv_arg)
 798                         goto out;
 799                 *recv_arg = '\0';
 800                 recv_arg++;
 801                 ret = get_audio_format_num(arg);
 802                 if (ret < 0)
 803                         goto out;
 804                 /*
 805                  * If multiple receivers are given for this audio format, the
 806                  * last one wins and we have to free the previous receiver
 807                  * config here. Since we are iterating backwards, the winning
 808                  * receiver arg is in fact the first one given.
 809                  */
 810                 if (afi[ret].receiver_conf)
 811                         afi[ret].receiver->free_config(afi[ret].receiver_conf);
 812                 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
 813                 if (!afi[ret].receiver_conf) {
 814                         ret = -E_RECV_SYNTAX;
 815                         goto out;
 816                 }
 817                 afi[ret].receiver = &receivers[receiver_num];
 818         }
 819         /*
 820          * Use the first available receiver with no arguments for those audio
 821          * formats for which no receiver was specified.
 822          */
 823         cmd = para_strdup(receivers[0].name);
 824         FOR_EACH_AUDIO_FORMAT(i) {
 825                 a = &afi[i];
 826                 if (a->receiver_conf)
 827                         continue;
 828                 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
 829                 if (!a->receiver_conf)
 830                         return -E_RECV_SYNTAX;
 831                 a->receiver = &receivers[receiver_num];
 832         }
 833         ret = 1;
 834 out:
 835         free(cmd);
 836         return ret;
 837 }
 838
 839 static int init_default_filters(void)
 840 {
 841         int i, ret = 1;
 842
 843         FOR_EACH_AUDIO_FORMAT(i) {
 844                 struct audio_format_info *a = &afi[i];
 845                 char *tmp;
 846                 int j;
 847
 848                 if (a->num_filters)
 849                         continue; /* no default -- nothing to to */
 850                 /*
 851                  * If udp is used to receive this audiod format, add fecdec as
 852                  * the first filter.
 853                  */
 854                 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
 855                                 strcmp(afi[i].receiver->name, "dccp") == 0) {
 856                         tmp = para_strdup("fecdec");
 857                         add_filter(i, tmp);
 858                         free(tmp);
 859                         if (ret < 0)
 860                                 goto out;
 861                 }
 862                 /* add "dec" to audio format name */
 863                 tmp = make_message("%sdec", audio_formats[i]);
 864                 for (j = 0; filters[j].name; j++)
 865                         if (!strcmp(tmp, filters[j].name))
 866                                 break;
 867                 free(tmp);
 868                 ret = -E_UNSUPPORTED_FILTER;
 869                 if (!filters[j].name)
 870                         goto out;
 871                 tmp = para_strdup(filters[j].name);
 872                 ret = add_filter(i, tmp);
 873                 free(tmp);
 874                 if (ret < 0)
 875                         goto out;
 876                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 877                         filters[j].name);
 878         }
 879 out:
 880         return ret;
 881 }
 882
 883 static int parse_filter_args(void)
 884 {
 885         int i, ret, nf;
 886
 887         nf = PARA_MAX(2U, conf.filter_given);
 888         PARA_INFO_LOG("maximal number of filters: %d\n", nf);
 889         FOR_EACH_AUDIO_FORMAT(i) {
 890                 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
 891                 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
 892         }
 893         if (!conf.no_default_filters_given)
 894                 return init_default_filters();
 895         for (i = 0; i < conf.filter_given; i++) {
 896                 char *arg = conf.filter_arg[i];
 897                 char *filter_name = strchr(arg, ':');
 898                 ret = -E_MISSING_COLON;
 899                 if (!filter_name)
 900                         goto out;
 901                 *filter_name = '\0';
 902                 filter_name++;
 903                 ret = get_audio_format_num(arg);
 904                 if (ret < 0)
 905                         goto out;
 906                 ret = add_filter(ret, filter_name);
 907                 if (ret < 0)
 908                         goto out;
 909         }
 910         ret = init_default_filters(); /* use default values for the rest */
 911 out:
 912         return ret;
 913 }
 914
 915 static int parse_stream_args(void)
 916 {
 917         int ret;
 918
 919         ret = parse_receiver_args();
 920         if (ret < 0)
 921                 return ret;
 922         ret = parse_filter_args();
 923         if (ret < 0)
 924                 return ret;
 925         ret = parse_writer_args();
 926         if (ret < 0)
 927                 return ret;
 928         return 1;
 929 }
 930
 931 /* does not unlink socket on errors */
 932 static int audiod_get_socket(void)
 933 {
 934         struct sockaddr_un unix_addr;
 935         int ret, fd;
 936
 937         if (conf.socket_given)
 938                 socket_name = para_strdup(conf.socket_arg);
 939         else {
 940                 char *hn = para_hostname();
 941                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 942                         hn);
 943                 free(hn);
 944         }
 945         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 946         if (conf.force_given)
 947                 unlink(socket_name);
 948         ret = create_local_socket(socket_name, &unix_addr,
 949                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 950         if (ret < 0)
 951                 goto err;
 952         fd = ret;
 953         if (listen(fd , 5) < 0) {
 954                 ret = -ERRNO_TO_PARA_ERROR(errno);
 955                 goto err;
 956         }
 957         ret = mark_fd_nonblocking(fd);
 958         if (ret < 0)
 959                 goto err;
 960         return fd;
 961 err:
 962         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 963         exit(EXIT_FAILURE);
 964 }
 965
 966 static void signal_pre_select(struct sched *s, struct task *t)
 967 {
 968         struct signal_task *st = container_of(t, struct signal_task, task);
 969         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 970 }
 971
 972 static void signal_post_select(struct sched *s, __a_unused struct task *t)
 973 {
 974         int signum;
 975
 976         signum = para_next_signal(&s->rfds);
 977         switch (signum) {
 978         case SIGINT:
 979         case SIGTERM:
 980         case SIGHUP:
 981                 PARA_EMERG_LOG("terminating on signal %d\n", signum);
 982                 clean_exit(EXIT_FAILURE, "caught deadly signal");
 983         }
 984 }
 985
 986 static void signal_setup_default(struct signal_task *st)
 987 {
 988         st->task.pre_select = signal_pre_select;
 989         st->task.post_select = signal_post_select;
 990         sprintf(st->task.status, "signal task");
 991 }
 992
 993 static void command_pre_select(struct sched *s, struct task *t)
 994 {
 995         struct command_task *ct = container_of(t, struct command_task, task);
 996         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
 997 }
 998
 999 static void command_post_select(struct sched *s, struct task *t)
1000 {
1001         int ret;
1002         struct command_task *ct = container_of(t, struct command_task, task);
1003         static struct timeval last_status_dump;
1004         struct timeval tmp, delay = {0, 500 * 1000};
1005
1006         tv_add(&last_status_dump, &delay, &tmp);
1007         if (tv_diff(&tmp, now, NULL) < 0) {
1008                 audiod_status_dump();
1009                 last_status_dump = *now;
1010         }
1011
1012         ret = handle_connect(ct->fd, &s->rfds);
1013         if (ret < 0)
1014                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1015         audiod_status_dump();
1016 }
1017
1018 static void init_command_task(struct command_task *ct)
1019 {
1020         ct->task.pre_select = command_pre_select;
1021         ct->task.post_select = command_post_select;
1022         ct->task.error = 0;
1023         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1024         sprintf(ct->task.status, "command task");
1025 }
1026
1027 static void close_stat_pipe(void)
1028 {
1029         if (!stat_task->ct)
1030                 return;
1031         btr_free_node(stat_task->ct->btrn);
1032         client_close(stat_task->ct);
1033         stat_task->ct = NULL;
1034         clear_and_dump_items();
1035         stat_task->length_seconds = 0;
1036         stat_task->offset_seconds = 0;
1037         stat_task->vss_status = 0;
1038         stat_task->current_audio_format_num = -1;
1039         audiod_status_dump();
1040 }
1041
1042 /**
1043  * close the connection to para_server and exit
1044  *
1045  * \param status the exit status which is passed to exit(3)
1046  * \param msg the log message
1047  *
1048  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1049  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1050  * EXIT_FAILURE.
1051  *
1052  * \sa exit(3)
1053  */
1054 void __noreturn clean_exit(int status, const char *msg)
1055 {
1056         PARA_EMERG_LOG("%s\n", msg);
1057         if (socket_name)
1058                 unlink(socket_name);
1059         close_stat_pipe();
1060         exit(status);
1061 }
1062
1063 /* avoid busy loop if server is down */
1064 static void set_stat_task_restart_barrier(unsigned seconds)
1065 {
1066         struct timeval delay = {seconds, 0};
1067         tv_add(now, &delay, &stat_task->restart_barrier);
1068 }
1069
1070 static void try_to_close_slot(int slot_num)
1071 {
1072         struct slot_info *s = &slot[slot_num];
1073         struct audio_format_info *a = afi + s->format;
1074         int i;
1075
1076         if (s->format < 0)
1077                 return;
1078         if (s->receiver_node && s->receiver_node->task.error >= 0)
1079                 return;
1080         for (i = 0; i < a->num_filters; i++)
1081                 if (s->fns && s->fns[i].task.error >= 0)
1082                         return;
1083         if (a->num_writers > 0) {
1084                 for (i = 0; i < a->num_writers; i++)
1085                         if (s->wns && s->wns[i].task.error >= 0)
1086                                 return;
1087         } else {
1088                 if (s->wns && s->wns[0].task.error >= 0)
1089                         return;
1090         }
1091         PARA_INFO_LOG("closing slot %d\n", slot_num);
1092         close_writers(s);
1093         close_filters(s);
1094         close_receiver(slot_num);
1095         clear_slot(slot_num);
1096 }
1097
1098 /*
1099  * Check if any receivers/filters/writers need to be started and do so if
1100  * necessary.
1101  */
1102 static void start_stop_decoders(void)
1103 {
1104         int i, ret;
1105         struct slot_info *sl;
1106         struct audio_format_info *a;
1107
1108         FOR_EACH_SLOT(i)
1109                 try_to_close_slot(i);
1110         if (audiod_status != AUDIOD_ON ||
1111                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1112                 return kill_all_decoders(-E_NOT_PLAYING);
1113         if (!must_start_decoder())
1114                 return;
1115         ret = open_receiver(stat_task->current_audio_format_num);
1116         if (ret < 0) {
1117                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1118                 return;
1119         }
1120         sl = slot + ret;
1121         a = afi + sl->format;
1122         if (a->num_filters)
1123                 open_filters(sl);
1124         open_writers(sl);
1125         activate_grab_clients();
1126         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1127 }
1128
1129 static void status_pre_select(struct sched *s, struct task *t)
1130 {
1131         struct status_task *st = container_of(t, struct status_task, task);
1132         int ret, cafn = stat_task->current_audio_format_num;
1133
1134         if (must_start_decoder())
1135                 goto min_delay;
1136         ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
1137         if (ret > 0)
1138                 goto min_delay;
1139         if (st->ct && audiod_status == AUDIOD_OFF)
1140                 goto min_delay;
1141         if (!st->ct && audiod_status != AUDIOD_OFF)
1142                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1143         if (cafn >= 0)
1144                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1145         /*
1146          * If para_server is playing we'd like to have a smooth time display
1147          * even if we are running in standby mode. So we request a timeout that
1148          * expires at the next full second.
1149          */
1150         if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1151                 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1152         return;
1153 min_delay:
1154         sched_min_delay(s);
1155 }
1156
1157 /* restart the client task if necessary */
1158 static void status_post_select(__a_unused struct sched *s, struct task *t)
1159 {
1160         struct status_task *st = container_of(t, struct status_task, task);
1161
1162         if (audiod_status == AUDIOD_OFF) {
1163                 if (!st->ct)
1164                         goto out;
1165                 if (st->ct->task.error >= 0) {
1166                         kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
1167                         goto out;
1168                 }
1169                 if (st->ct->task.error >= 0)
1170                         goto out;
1171                 close_stat_pipe();
1172                 st->clock_diff_count = conf.clock_diff_count_arg;
1173                 goto out;
1174         }
1175         if (st->ct) {
1176                 char *buf;
1177                 size_t sz;
1178                 int ret;
1179                 if (st->ct->task.error < 0) {
1180                         if (st->ct->task.error >= 0)
1181                                 goto out;
1182                         close_stat_pipe();
1183                         goto out;
1184                 }
1185                 if (st->ct->status != CL_RECEIVING)
1186                         goto out;
1187                 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1188                 if (ret <= 0) {
1189                         struct timeval diff;
1190                         tv_diff(now, &st->last_status_read, &diff);
1191                         if (diff.tv_sec > 61)
1192                                 kill_btrn(st->ct->btrn, &st->ct->task,
1193                                         -E_STATUS_TIMEOUT);
1194                         goto out;
1195                 }
1196                 btr_merge(st->btrn, st->min_iqs);
1197                 sz = btr_next_buffer(st->btrn, &buf);
1198                 ret = for_each_stat_item(buf, sz, update_item);
1199                 if (ret < 0) {
1200                         kill_btrn(st->ct->btrn, &st->ct->task, ret);
1201                         goto out;
1202                 }
1203                 if (sz != ret) {
1204                         btr_consume(st->btrn, sz - ret);
1205                         st->last_status_read = *now;
1206                         st->min_iqs = 0;
1207                 } else /* current status item crosses buffers */
1208                         st->min_iqs = sz + 1;
1209                 goto out;
1210         }
1211         btr_drain(st->btrn);
1212         st->current_audio_format_num = -1;
1213         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1214                 goto out;
1215         if (st->clock_diff_count) { /* get status only one time */
1216                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1217                 int argc = 5;
1218                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1219                 st->clock_diff_count--;
1220                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1221                 set_stat_task_restart_barrier(2);
1222
1223         } else {
1224                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1225                 int argc = 4;
1226                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1227                 set_stat_task_restart_barrier(5);
1228         }
1229         free(stat_item_values[SI_BASENAME]);
1230         stat_item_values[SI_BASENAME] = para_strdup(
1231                 "no connection to para_server");
1232         stat_client_write_item(SI_BASENAME);
1233         st->last_status_read = *now;
1234 out:
1235         start_stop_decoders();
1236 }
1237
1238 static void init_status_task(struct status_task *st)
1239 {
1240         memset(st, 0, sizeof(struct status_task));
1241         st->task.pre_select = status_pre_select;
1242         st->task.post_select = status_post_select;
1243         st->sa_time_diff_sign = 1;
1244         st->clock_diff_count = conf.clock_diff_count_arg;
1245         st->current_audio_format_num = -1;
1246         sprintf(st->task.status, "stat");
1247         st->btrn = btr_new_node(&(struct btr_node_description)
1248                 EMBRACE(.name = "stat"));
1249 }
1250
1251 static void set_initial_status(void)
1252 {
1253         audiod_status = AUDIOD_ON;
1254         if (!conf.mode_given)
1255                 return;
1256         if (!strcmp(conf.mode_arg, "sb")) {
1257                 audiod_status = AUDIOD_STANDBY;
1258                 return;
1259         }
1260         if (!strcmp(conf.mode_arg, "off")) {
1261                 audiod_status = AUDIOD_OFF;
1262                 return;
1263         }
1264         if (strcmp(conf.mode_arg, "on"))
1265                 PARA_WARNING_LOG("invalid mode\n");
1266 }
1267
1268 __noreturn static void print_help_and_die(void)
1269 {
1270         int d = conf.detailed_help_given;
1271         const char **p = d? audiod_args_info_detailed_help
1272                 : audiod_args_info_help;
1273
1274         printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1275                 AUDIOD_CMDLINE_PARSER_VERSION);
1276         printf_or_die("%s\n\n", audiod_args_info_usage);
1277         for (; *p; p++)
1278                 printf_or_die("%s\n", *p);
1279         print_receiver_helps(d);
1280         print_filter_helps(d);
1281         print_writer_helps(d);
1282         exit(0);
1283 }
1284
1285 static void init_colors_or_die(void)
1286 {
1287         int i;
1288
1289         if (!want_colors())
1290                 return;
1291         daemon_set_default_log_colors();
1292         daemon_set_flag(DF_COLOR_LOG);
1293         for (i = 0; i < conf.log_color_given; i++)
1294                 daemon_set_log_color_or_die(conf.log_color_arg[i]);
1295 }
1296
1297 /**
1298  * the main function of para_audiod
1299  *
1300  * \param argc usual argument count
1301  * \param argv usual argument vector
1302  *
1303  * \return EXIT_SUCCESS or EXIT_FAILURE
1304  *
1305  * \sa para_audiod(1)
1306  * */
1307 int main(int argc, char *argv[])
1308 {
1309         int ret, i;
1310         static struct sched s;
1311         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1312         struct audiod_cmdline_parser_params params = {
1313                 .override = 0,
1314                 .initialize = 1,
1315                 .check_required = 0,
1316                 .check_ambiguity = 0,
1317                 .print_errors = 1
1318         };
1319
1320         valid_fd_012();
1321         if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1322                 exit(EXIT_FAILURE);
1323         HANDLE_VERSION_FLAG("audiod", conf);
1324         /* init receivers/filters/writers early to make help work */
1325         recv_init();
1326         filter_init();
1327         writer_init();
1328         if (conf.help_given || conf.detailed_help_given)
1329                 print_help_and_die();
1330         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1331         parse_config_or_die();
1332         init_colors_or_die();
1333         init_random_seed_or_die();
1334         daemon_set_flag(DF_LOG_TIME);
1335         daemon_set_flag(DF_LOG_HOSTNAME);
1336         daemon_set_flag(DF_LOG_LL);
1337         if (conf.log_timing_given)
1338                 daemon_set_flag(DF_LOG_TIMING);
1339         if (conf.logfile_given) {
1340                 daemon_set_logfile(conf.logfile_arg);
1341                 daemon_open_log_or_die();
1342         }
1343         ret = parse_stream_args();
1344         if (ret < 0) {
1345                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1346                 exit(EXIT_FAILURE);
1347         }
1348         log_welcome("para_audiod");
1349         server_uptime(UPTIME_SET);
1350         set_initial_status();
1351         FOR_EACH_SLOT(i)
1352                 clear_slot(i);
1353         setup_signal_handling();
1354         signal_setup_default(sig_task);
1355
1356         init_status_task(stat_task);
1357         init_command_task(cmd_task);
1358
1359         if (conf.daemon_given)
1360                 daemonize();
1361
1362         register_task(&sig_task->task);
1363         register_task(&cmd_task->task);
1364         register_task(&stat_task->task);
1365         s.default_timeout.tv_sec = 2;
1366         s.default_timeout.tv_usec = 999 * 1000;
1367         ret = schedule(&s);
1368
1369         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1370         return EXIT_FAILURE;
1371 }