audiod.c

   1 /*
   2  * Copyright (C) 2005-2010 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 <dirent.h>
  11 #include <signal.h>
  12 #include <openssl/rc4.h>
  13 #include <stdbool.h>
  14
  15 #include "para.h"
  16 #include "error.h"
  17 #include "crypt.h"
  18 #include "audiod.cmdline.h"
  19 #include "list.h"
  20 #include "sched.h"
  21 #include "ggo.h"
  22 #include "recv.h"
  23 #include "buffer_tree.h"
  24 #include "filter.h"
  25 #include "grab_client.h"
  26 #include "client.cmdline.h"
  27 #include "client.h"
  28 #include "audiod.h"
  29 #include "net.h"
  30 #include "daemon.h"
  31 #include "string.h"
  32 #include "fd.h"
  33 #include "write.h"
  34 #include "write_common.h"
  35 #include "signal.h"
  36
  37 /** define the array of error lists needed by para_audiod */
  38 INIT_AUDIOD_ERRLISTS;
  39 /** define the array containing all supported audio formats */
  40 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
  41
  42 /** Defines how audiod handles one supported audio format. */
  43 struct audio_format_info {
  44         /** pointer to the receiver for this audio format */
  45         struct receiver *receiver;
  46         /** the receiver configuration */
  47         void *receiver_conf;
  48         /** the number of filters that should be activated for this audio format */
  49         unsigned int num_filters;
  50         /** Array of filter numbers to be activated. */
  51         unsigned *filter_nums;
  52         /** Pointer to the array of filter configurations. */
  53         void **filter_conf;
  54         /** the number of filters that should be activated for this audio format */
  55         unsigned int num_writers;
  56         /** Array of writer numbers to be activated. */
  57         int *writer_nums;
  58         /** pointer to the array of writer configurations */
  59         void **writer_conf;
  60         /** do not start receiver/filters/writer before this time */
  61         struct timeval restart_barrier;
  62 };
  63
  64 /**
  65  * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
  66  * be associated with a receiver/filter/writer triple. This array holds all
  67  * information on the status of these slots.
  68  *
  69  * \sa struct slot_info
  70  * */
  71 struct slot_info slot[MAX_STREAM_SLOTS];
  72
  73 /** The vss status flags audiod is interested in. */
  74 enum vss_status_flags {
  75         /** Whether the 'N' flag is set. */
  76         VSS_STATUS_FLAG_NEXT = 1,
  77         /** The 'P' flag is set. */
  78         VSS_STATUS_FLAG_PLAYING = 2,
  79 };
  80
  81 /**
  82  * The task for obtaining para_server's status (para_client stat).
  83  *
  84  * \sa struct task, struct sched.
  85  */
  86 struct status_task {
  87         /** The associated task structure of audiod. */
  88         struct task task;
  89         /** Client data associated with the stat task. */
  90         struct client_task *ct;
  91         /** Do not restart client command until this time. */
  92         struct timeval restart_barrier;
  93         /** Last time we received status data from para_server. */
  94         struct timeval last_status_read;
  95         size_t min_iqs;
  96         /** The offset value announced by para_server. */
  97         int offset_seconds;
  98         /** The length of the current audio file as announced by para_server. */
  99         int length_seconds;
 100         /** The start of the current stream from the view of para_server. */
 101         struct timeval server_stream_start;
 102         /** The average time deviation between para_server and para_audiod. */
 103         struct timeval sa_time_diff;
 104         /** Whether client time is ahead of server time. */
 105         int sa_time_diff_sign;
 106         /** The 'P' and the 'N' flags as announced by para_server. */
 107         enum vss_status_flags vss_status;
 108         /** Number of times the clock difference is to be checked. */
 109         unsigned clock_diff_count;
 110         /** When to start the next check for clock difference. */
 111         struct timeval clock_diff_barrier;
 112         /** Number of the audio format as announced by para_server. */
 113         int current_audio_format_num;
 114         /* The status task btrn is the child of the client task. */
 115         struct btr_node *btrn;
 116 };
 117
 118 /** The array of status items sent by para_server. */
 119 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 120
 121 /**
 122  * the current mode of operation of which can be changed by the on/off/cycle
 123  * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
 124  */
 125 int audiod_status = AUDIOD_ON;
 126
 127 /**
 128  * the gengetopt args_info struct that holds information on all command line
 129  * arguments
 130  */
 131 struct audiod_args_info conf;
 132
 133 static char *socket_name;
 134 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 135
 136 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
 137
 138 static struct status_task status_task_struct;
 139
 140 /**
 141  * the task that calls the status command of para_server
 142  *
 143  * \sa struct status_task
 144  */
 145 static struct status_task *stat_task = &status_task_struct;
 146
 147 /**
 148  * the task for handling audiod commands
 149  *
 150  * \sa struct task, struct sched
 151  */
 152 struct command_task {
 153         /** the local listening socket */
 154         int fd;
 155         /** the associated task structure */
 156         struct task task;
 157 };
 158
 159 /** iterate over all supported audio formats */
 160 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 161
 162 /**
 163  * Get the audio format number.
 164  *
 165  * \param name The name of the audio format.
 166  *
 167  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
 168  * \a name is not a supported audio format.
 169  */
 170 int get_audio_format_num(const char *name)
 171 {
 172         int i;
 173
 174         while (para_isspace(*name))
 175                 name++;
 176         FOR_EACH_AUDIO_FORMAT(i)
 177                 if (!strcmp(name, audio_formats[i]))
 178                         return i;
 179         return -E_UNSUPPORTED_AUDIO_FORMAT;
 180 }
 181
 182 /**
 183  * Compute the play time based on information of the given slot.
 184  *
 185  * \param slot_num The slot number (negative means: no slot).
 186  *
 187  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 188  * from the status items received from para_server and the start time of the
 189  * (first) writer of the given slot.
 190  *
 191  * It has to to take into account that probably the stream was not started at
 192  * the beginning of the file, that the clock between the server and the client
 193  * host may differ and that playback of the stream was delayed, e.g. because
 194  * the prebuffer filter is used in the filter chain of the given slot.
 195  *
 196  * If no writer is active in the given slot, or \a slot_num is negative
 197  * (indicating that para_audiod runs in standby mode), an approximation based
 198  * only on the status items is computed and the returned string is prefixed
 199  * with "~".
 200  *
 201  * \return A string that must be freed by the caller.
 202  */
 203 char *get_time_string(int slot_num)
 204 {
 205         int ret, seconds = 0, length;
 206         struct timeval *tmp, sum, sss, /* server stream start */
 207                 rstime, /* receiver start time */
 208                 wstime, /* writer start time */
 209                 wtime, /* now - writer start */
 210                 rskip; /* receiver start - sss */
 211         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 212         char *msg;
 213
 214         if (audiod_status == AUDIOD_OFF)
 215                 goto empty;
 216         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 217                 if (stat_task->length_seconds) /* paused */
 218                         return NULL;
 219                 goto empty; /* stopped */
 220         }
 221         if (audiod_status == AUDIOD_ON && !s)
 222                 goto empty;
 223         /*
 224          * Valid status items and playing, set length and tmp to the stream
 225          * start. We use the slot info and fall back to the info from current
 226          * status items if no slot info is available.
 227          */
 228         length = stat_task->length_seconds;
 229         tmp = &stat_task->server_stream_start;
 230         if (s && s->wns) { /* writer active in this slot */
 231                 btr_get_node_start(s->wns[0].btrn, &wstime);
 232                 if (wstime.tv_sec != 0) { /* writer wrote something */
 233                         if (s->server_stream_start.tv_sec == 0) {
 234                                 /* copy status info to slot */
 235                                 s->server_stream_start = stat_task->server_stream_start;
 236                                 s->offset_seconds = stat_task->offset_seconds;
 237                                 s->seconds_total = stat_task->length_seconds;
 238                         }
 239                         length = s->seconds_total;
 240                         tmp = &s->server_stream_start;
 241                 }
 242         }
 243         if (stat_task->sa_time_diff_sign > 0)
 244                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 245         else
 246                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 247         if (!s || !s->wns) {
 248                 struct timeval diff;
 249                 tv_diff(now, &sss, &diff);
 250                 seconds = diff.tv_sec + stat_task->offset_seconds;
 251                 goto out;
 252         }
 253         tv_diff(now, &wstime, &wtime);
 254         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 255         seconds = s->offset_seconds;
 256         btr_get_node_start(s->receiver_node->btrn, &rstime);
 257         ret = tv_diff(&rstime, &sss, &rskip);
 258         if (ret > 0) { /* audiod was started in the middle of the stream */
 259                 tv_add(&wtime, &rskip, &sum);
 260                 seconds += sum.tv_sec;
 261         } else
 262                 seconds += wtime.tv_sec;
 263 out:
 264         seconds = PARA_MIN(seconds, length);
 265         seconds = PARA_MAX(seconds, 0);
 266         msg = make_message(
 267                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 268                 s? "" : "~",
 269                 seconds / 60,
 270                 seconds % 60,
 271                 (length - seconds) / 60,
 272                 (length - seconds) % 60,
 273                 length? (seconds * 100 + length / 2) / length : 0,
 274                 length / 60,
 275                 length % 60
 276         );
 277         PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 278         return msg;
 279 empty:
 280         return para_strdup(NULL);
 281 }
 282
 283 static int want_colors(void)
 284 {
 285         if (conf.color_arg == color_arg_no)
 286                 return 0;
 287         if (conf.color_arg == color_arg_yes)
 288                 return 1;
 289         if (conf.logfile_given)
 290                 return 0;
 291         return isatty(STDERR_FILENO);
 292 }
 293
 294 static void parse_config_or_die(void)
 295 {
 296         int ret;
 297         char *config_file;
 298         struct audiod_cmdline_parser_params params = {
 299                 .override = 0,
 300                 .initialize = 0,
 301                 .check_required = 1,
 302                 .check_ambiguity = 0,
 303                 .print_errors = 1
 304         };
 305
 306         if (conf.config_file_given)
 307                 config_file = para_strdup(conf.config_file_arg);
 308         else {
 309                 char *home = para_homedir();
 310                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 311                 free(home);
 312         }
 313         ret = file_exists(config_file);
 314         if (conf.config_file_given && !ret) {
 315                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 316                 goto err;
 317         }
 318         if (ret)
 319                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 320         free(config_file);
 321         daemon_set_loglevel(conf.loglevel_arg);
 322         return;
 323 err:
 324         free(config_file);
 325         exit(EXIT_FAILURE);
 326 }
 327
 328 static void setup_signal_handling(void)
 329 {
 330         sig_task->fd = para_signal_init();
 331         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 332         para_install_sighandler(SIGINT);
 333         para_install_sighandler(SIGTERM);
 334         para_install_sighandler(SIGHUP);
 335         para_sigaction(SIGPIPE, SIG_IGN);
 336 }
 337
 338 static void clear_slot(int slot_num)
 339 {
 340         struct slot_info *s = &slot[slot_num];
 341
 342         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 343         memset(s, 0, sizeof(struct slot_info));
 344         s->format = -1;
 345 }
 346
 347 static void close_receiver(int slot_num)
 348 {
 349         struct slot_info *s = &slot[slot_num];
 350         struct audio_format_info *a;
 351
 352         if (s->format < 0 || !s->receiver_node)
 353                 return;
 354         a = &afi[s->format];
 355         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 356                 audio_formats[s->format], slot_num);
 357         a->receiver->close(s->receiver_node);
 358         btr_free_node(s->receiver_node->btrn);
 359         free(s->receiver_node);
 360         s->receiver_node = NULL;
 361 }
 362
 363 static void writer_cleanup(struct writer_node *wn)
 364 {
 365         struct writer *w;
 366
 367         if (!wn)
 368                 return;
 369         w = writers + wn->writer_num;
 370         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 371         w->close(wn);
 372         btr_free_node(wn->btrn);
 373 }
 374
 375 static void close_writers(struct slot_info *s)
 376 {
 377         struct audio_format_info *a;
 378         int i;
 379
 380         if (s->format < 0)
 381                 return;
 382         assert(s->wns);
 383         a = afi + s->format;
 384         if (a->num_writers == 0)
 385                 writer_cleanup(s->wns);
 386         else {
 387                 for (i = 0; i < a->num_writers; i++)
 388                         writer_cleanup(s->wns + i);
 389         }
 390         free(s->wns);
 391         s->wns = NULL;
 392 }
 393
 394 static void close_filters(struct slot_info *s)
 395 {
 396         int i;
 397         struct audio_format_info *a = afi + s->format;
 398         if (a->num_filters == 0)
 399                 return;
 400         for (i = 0; i < a->num_filters; i++) {
 401                 struct filter_node *fn = s->fns + i;
 402                 struct filter *f;
 403
 404                 if (!fn)
 405                         continue;
 406                 f = filters + fn->filter_num;
 407                 if (f->close)
 408                         f->close(fn);
 409                 btr_free_node(fn->btrn);
 410         }
 411         free(s->fns);
 412         s->fns = NULL;
 413 }
 414
 415 /*
 416  * Whenever a task commits suicide by returning from post_select with t->error
 417  * < 0, it also removes its btr node. We do exactly that to kill a running
 418  * task. Note that the scheduler checks t->error also _before_ each pre/post
 419  * select call, so the victim will never be scheduled again.
 420  */
 421 static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
 422 {
 423         if (t->error < 0)
 424                 return;
 425         t->error = error;
 426         btr_remove_node(btrn);
 427 }
 428
 429 static void kill_all_decoders(int error)
 430 {
 431         int i, j;
 432
 433         FOR_EACH_SLOT(i) {
 434                 struct slot_info *s = &slot[i];
 435                 struct audio_format_info *a;
 436                 if (s->format < 0)
 437                         continue;
 438                 a = afi + s->format;
 439                 if (s->wns)
 440                         for (j = 0; j < a->num_writers; j++)
 441                                 kill_btrn(s->wns[j].btrn, &s->wns[j].task, error);
 442                 if (s->fns)
 443                         for (j = 0; j < a->num_writers; j++)
 444                                 kill_btrn(s->fns[j].btrn, &s->wns[j].task, error);
 445                 if (s->receiver_node)
 446                         kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
 447                                 error);
 448         }
 449 }
 450
 451 static int get_empty_slot(void)
 452 {
 453         int i;
 454         struct slot_info *s;
 455
 456         FOR_EACH_SLOT(i) {
 457                 s = &slot[i];
 458                 if (s->format < 0) {
 459                         clear_slot(i);
 460                         return i;
 461                 }
 462                 if (s->wns || s->receiver_node || s->fns)
 463                         continue;
 464                 clear_slot(i);
 465                 return i;
 466         }
 467         return -E_NO_MORE_SLOTS;
 468 }
 469
 470 /**
 471  * get the number of filters
 472  *
 473  * \param audio_format_num the number identifying the audio format
 474  *
 475  * \return the number of filters for the given audio format
 476  *
 477  * \sa struct filter;
 478  */
 479 int num_filters(int audio_format_num)
 480 {
 481         return afi[audio_format_num].num_filters;
 482 }
 483
 484 static void open_filters(struct slot_info *s)
 485 {
 486         struct audio_format_info *a = afi + s->format;
 487         struct filter_node *fn;
 488         int nf = a->num_filters;
 489         struct btr_node *parent;
 490         int i;
 491
 492         if (nf == 0)
 493                 return;
 494         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 495         assert(s->fns == NULL);
 496         s->fns = para_calloc(nf * sizeof(struct filter_node));
 497         parent = s->receiver_node->btrn;
 498         for (i = 0; i < nf; i++) {
 499                 struct filter *f = filters + a->filter_nums[i];
 500                 fn = s->fns + i;
 501                 fn->filter_num = a->filter_nums[i];
 502                 fn->conf = a->filter_conf[i];
 503                 fn->task.pre_select = f->pre_select;
 504                 fn->task.post_select = f->post_select;
 505
 506                 fn->btrn = btr_new_node(&(struct btr_node_description)
 507                         EMBRACE(.name = f->name, .parent = parent,
 508                                 .handler = f->execute, .context = fn));
 509
 510                 f->open(fn);
 511                 register_task(&fn->task);
 512                 parent = fn->btrn;
 513                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 514                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 515                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 516         }
 517 }
 518
 519 static void open_writers(struct slot_info *s)
 520 {
 521         int i;
 522         struct audio_format_info *a = afi + s->format;
 523         struct writer_node *wn;
 524         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 525
 526         assert(s->wns == NULL);
 527         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 528                 * sizeof(struct writer_node));
 529         if (a->num_writers == 0)
 530                 setup_writer_node(NULL, parent, s->wns);
 531         else {
 532                 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 533                 for (i = 0; i < a->num_writers; i++) {
 534                         wn = s->wns + i;
 535                         wn->conf = a->writer_conf[i];
 536                         wn->writer_num = a->writer_nums[i];
 537                         register_writer_node(wn, parent);
 538                 }
 539         }
 540 }
 541
 542 /* returns slot num on success */
 543 static int open_receiver(int format)
 544 {
 545         struct audio_format_info *a = &afi[format];
 546         struct slot_info *s;
 547         int ret, slot_num;
 548         struct receiver *r = a->receiver;
 549         struct receiver_node *rn;
 550
 551         tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
 552         ret = get_empty_slot();
 553         if (ret < 0)
 554                 return ret;
 555         slot_num = ret;
 556         rn = para_calloc(sizeof(*rn));
 557         rn->receiver = r;
 558         rn->conf = a->receiver_conf;
 559         rn->btrn = btr_new_node(&(struct btr_node_description)
 560                 EMBRACE(.name = r->name, .context = rn));
 561         ret = r->open(rn);
 562         if (ret < 0) {
 563                 btr_free_node(rn->btrn);
 564                 free(rn);
 565                 return ret;
 566         }
 567         s = &slot[slot_num];
 568         s->format = format;
 569         s->receiver_node = rn;
 570         PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
 571                 audio_formats[format], r->name, slot_num);
 572         rn->task.pre_select = r->pre_select;
 573         rn->task.post_select = r->post_select;
 574         sprintf(rn->task.status, "%s receiver node", r->name);
 575         register_task(&rn->task);
 576         return slot_num;
 577 }
 578
 579 static bool receiver_running(void)
 580 {
 581         int i;
 582         long unsigned ss1 = stat_task->server_stream_start.tv_sec;
 583
 584         FOR_EACH_SLOT(i) {
 585                 struct slot_info *s = &slot[i];
 586                 long unsigned ss2 = s->server_stream_start.tv_sec;
 587
 588                 if (!s->receiver_node)
 589                         continue;
 590                 if (s->receiver_node->task.error >= 0)
 591                         return true;
 592                 if (ss1 == ss2)
 593                         return true;
 594         }
 595         return false;
 596 }
 597
 598 /**
 599  * Return the root node of the current buffer tree.
 600  *
 601  * This is only used for stream grabbing.
 602  *
 603  * \return \p NULL if no slot is currently active. If more than one buffer tree
 604  * exists, the node corresponding to the most recently started receiver is
 605  * returned.
 606  */
 607 struct btr_node *audiod_get_btr_root(void)
 608 {
 609         int i, newest_slot = -1;
 610         struct timeval newest_rstime = {0, 0};
 611
 612         FOR_EACH_SLOT(i) {
 613                 struct slot_info *s = &slot[i];
 614                 struct timeval rstime;
 615                 if (!s->receiver_node)
 616                         continue;
 617                 if (s->receiver_node->task.error < 0)
 618                         continue;
 619                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 620                 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
 621                         continue;
 622                 newest_rstime = rstime;
 623                 newest_slot = i;
 624         }
 625         if (newest_slot == -1)
 626                 return NULL;
 627         return slot[newest_slot].receiver_node->btrn;
 628 }
 629
 630 /* whether a new instance of a decoder should be started. */
 631 static bool must_start_decoder(void)
 632 {
 633         int cafn = stat_task->current_audio_format_num;
 634         unsigned vs = stat_task->vss_status;
 635
 636         if (cafn < 0)
 637                 return false;
 638         if (!stat_task->ct)
 639                 return false;
 640         if (vs & VSS_STATUS_FLAG_NEXT)
 641                 return false;
 642         if (!(vs & VSS_STATUS_FLAG_PLAYING))
 643                 return false;
 644         if (receiver_running())
 645                 return false;
 646         if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
 647                 return false;
 648         return true;
 649 }
 650
 651 static unsigned compute_time_diff(const struct timeval *status_time)
 652 {
 653         struct timeval tmp, diff;
 654         static unsigned count;
 655         int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
 656         const struct timeval max_deviation = {0, 500 * 1000};
 657         const int time_smooth = 5;
 658
 659         if (!status_time)
 660                 return count;
 661         sign = tv_diff(status_time, now, &diff);
 662 //              PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
 663 //                      sign, sa_time_diff_sign);
 664         if (!count) {
 665                 sa_time_diff_sign = sign;
 666                 stat_task->sa_time_diff = diff;
 667                 count++;
 668                 goto out;
 669         }
 670         if (count > 5) {
 671                 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
 672                 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
 673                         PARA_WARNING_LOG("time diff jump: %lims\n",
 674                                 s * tv2ms(&tmp));
 675         }
 676         count++;
 677         sa_time_diff_sign = tv_convex_combination(
 678                 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
 679                 count > 10? sign : sign * time_smooth, &diff,
 680                 &tmp);
 681         stat_task->sa_time_diff = tmp;
 682         PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
 683                 sign < 0? "-" : "+",
 684                 tv2ms(&diff),
 685                 sa_time_diff_sign < 0? "-" : "+",
 686                 tv2ms(&stat_task->sa_time_diff)
 687         );
 688 out:
 689         stat_task->sa_time_diff_sign = sa_time_diff_sign;
 690         return count;
 691 }
 692
 693 static int update_item(int itemnum, char *buf)
 694 {
 695         long unsigned sec, usec;
 696
 697         if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
 698                 return 1;
 699         free(stat_item_values[itemnum]);
 700         stat_item_values[itemnum] = para_strdup(buf);
 701         stat_client_write_item(itemnum);
 702         switch (itemnum) {
 703         case SI_STATUS_FLAGS:
 704                 stat_task->vss_status = 0;
 705                 if (strchr(buf, 'N'))
 706                         stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
 707                 if (strchr(buf, 'P'))
 708                         stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
 709                 break;
 710         case SI_OFFSET:
 711                 stat_task->offset_seconds = atoi(buf);
 712                 break;
 713         case SI_SECONDS_TOTAL:
 714                 stat_task->length_seconds = atoi(buf);
 715                 break;
 716         case SI_STREAM_START:
 717                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 718                         stat_task->server_stream_start.tv_sec = sec;
 719                         stat_task->server_stream_start.tv_usec = usec;
 720                 }
 721                 break;
 722         case SI_CURRENT_TIME:
 723                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 724                         struct timeval tv = {sec, usec};
 725                         compute_time_diff(&tv);
 726                 }
 727                 break;
 728         case SI_FORMAT:
 729                 stat_task->current_audio_format_num
 730                         = get_audio_format_num(buf);
 731         }
 732         return 1;
 733 }
 734
 735 static int parse_stream_command(const char *txt, char **cmd)
 736 {
 737         char *p = strchr(txt, ':');
 738         int i;
 739
 740         if (!p)
 741                 return -E_MISSING_COLON;
 742         p++;
 743         FOR_EACH_AUDIO_FORMAT(i) {
 744                 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
 745                         continue;
 746                 *cmd = p;
 747                 return i;
 748         }
 749         return -E_UNSUPPORTED_AUDIO_FORMAT;
 750 }
 751
 752 static int add_filter(int format, char *cmdline)
 753 {
 754         struct audio_format_info *a = &afi[format];
 755         int filter_num, nf = a->num_filters;
 756
 757         filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
 758         if (filter_num < 0)
 759                 return filter_num;
 760         a->filter_nums[nf] = filter_num;
 761         a->num_filters++;
 762         PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
 763                 filters[filter_num].name);
 764         return filter_num;
 765 }
 766
 767 static int parse_writer_args(void)
 768 {
 769         int i, ret, nw;
 770         char *cmd;
 771         struct audio_format_info *a;
 772
 773         nw = PARA_MAX(1U, conf.writer_given);
 774         PARA_INFO_LOG("maximal number of writers: %d\n", nw);
 775         FOR_EACH_AUDIO_FORMAT(i) {
 776                 a = &afi[i];
 777                 a->writer_conf = para_malloc(nw * sizeof(void *));
 778                 a->writer_nums = para_malloc(nw * sizeof(int));
 779                 a->num_writers = 0;
 780         }
 781         for (i = 0; i < conf.writer_given; i++) {
 782                 void *wconf;
 783                 int writer_num;
 784                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 785                 if (ret < 0)
 786                         goto out;
 787                 a = &afi[ret];
 788                 nw = a->num_writers;
 789                 wconf = check_writer_arg(cmd, &writer_num);
 790                 if (!wconf) {
 791                         ret = writer_num;
 792                         goto out;
 793                 }
 794                 a->writer_nums[nw] = writer_num;
 795                 a->writer_conf[nw] = wconf;
 796                 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
 797                         nw, writer_names[writer_num]);
 798                 a->num_writers++;
 799         }
 800         ret = 1;
 801 out:
 802         return ret;
 803 }
 804
 805 static int parse_receiver_args(void)
 806 {
 807         int i, ret, receiver_num;
 808         char *cmd = NULL;
 809         struct audio_format_info *a;
 810
 811         for (i = conf.receiver_given - 1; i >= 0; i--) {
 812                 char *arg = conf.receiver_arg[i];
 813                 char *recv_arg = strchr(arg, ':');
 814                 ret = -E_MISSING_COLON;
 815                 if (!recv_arg)
 816                         goto out;
 817                 *recv_arg = '\0';
 818                 recv_arg++;
 819                 ret = get_audio_format_num(arg);
 820                 if (ret < 0)
 821                         goto out;
 822                 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
 823                 if (!afi[ret].receiver_conf) {
 824                         ret = -E_RECV_SYNTAX;
 825                         goto out;
 826                 }
 827                 afi[ret].receiver = &receivers[receiver_num];
 828         }
 829         /* use the first available receiver with no arguments
 830          * for those audio formats for which no receiver
 831          * was specified
 832          */
 833         cmd = para_strdup(receivers[0].name);
 834         FOR_EACH_AUDIO_FORMAT(i) {
 835                 a = &afi[i];
 836                 if (a->receiver_conf)
 837                         continue;
 838                 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
 839                 if (!a->receiver_conf)
 840                         return -E_RECV_SYNTAX;
 841                 a->receiver = &receivers[receiver_num];
 842         }
 843         ret = 1;
 844 out:
 845         free(cmd);
 846         return ret;
 847 }
 848
 849 static int init_default_filters(void)
 850 {
 851         int i, ret = 1;
 852
 853         FOR_EACH_AUDIO_FORMAT(i) {
 854                 struct audio_format_info *a = &afi[i];
 855                 char *tmp;
 856                 int j;
 857
 858                 if (a->num_filters)
 859                         continue; /* no default -- nothing to to */
 860                 /*
 861                  * If udp is used to receive this audiod format, add fecdec as
 862                  * the first filter.
 863                  */
 864                 if (strcmp(afi[i].receiver->name, "udp") == 0) {
 865                         tmp = para_strdup("fecdec");
 866                         add_filter(i, tmp);
 867                         free(tmp);
 868                         if (ret < 0)
 869                                 goto out;
 870                 }
 871                 /* add "dec" to audio format name */
 872                 tmp = make_message("%sdec", audio_formats[i]);
 873                 for (j = 0; filters[j].name; j++)
 874                         if (!strcmp(tmp, filters[j].name))
 875                                 break;
 876                 free(tmp);
 877                 ret = -E_UNSUPPORTED_FILTER;
 878                 if (!filters[j].name)
 879                         goto out;
 880                 tmp = para_strdup(filters[j].name);
 881                 ret = add_filter(i, tmp);
 882                 free(tmp);
 883                 if (ret < 0)
 884                         goto out;
 885                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 886                         filters[j].name);
 887         }
 888 out:
 889         return ret;
 890 }
 891
 892 static int parse_filter_args(void)
 893 {
 894         int i, ret, nf;
 895
 896         nf = PARA_MAX(2U, conf.filter_given);
 897         PARA_INFO_LOG("maximal number of filters: %d\n", nf);
 898         FOR_EACH_AUDIO_FORMAT(i) {
 899                 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
 900                 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
 901         }
 902         if (!conf.no_default_filters_given)
 903                 return init_default_filters();
 904         for (i = 0; i < conf.filter_given; i++) {
 905                 char *arg = conf.filter_arg[i];
 906                 char *filter_name = strchr(arg, ':');
 907                 ret = -E_MISSING_COLON;
 908                 if (!filter_name)
 909                         goto out;
 910                 *filter_name = '\0';
 911                 filter_name++;
 912                 ret = get_audio_format_num(arg);
 913                 if (ret < 0)
 914                         goto out;
 915                 ret = add_filter(ret, filter_name);
 916                 if (ret < 0)
 917                         goto out;
 918         }
 919         ret = init_default_filters(); /* use default values for the rest */
 920 out:
 921         return ret;
 922 }
 923
 924 static int parse_stream_args(void)
 925 {
 926         int ret;
 927
 928         ret = parse_receiver_args();
 929         if (ret < 0)
 930                 return ret;
 931         ret = parse_filter_args();
 932         if (ret < 0)
 933                 return ret;
 934         ret = parse_writer_args();
 935         if (ret < 0)
 936                 return ret;
 937         return 1;
 938 }
 939
 940 /* does not unlink socket on errors */
 941 static int audiod_get_socket(void)
 942 {
 943         struct sockaddr_un unix_addr;
 944         int ret, fd;
 945
 946         if (conf.socket_given)
 947                 socket_name = para_strdup(conf.socket_arg);
 948         else {
 949                 char *hn = para_hostname();
 950                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 951                         hn);
 952                 free(hn);
 953         }
 954         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 955         if (conf.force_given)
 956                 unlink(socket_name);
 957         ret = create_local_socket(socket_name, &unix_addr,
 958                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 959         if (ret < 0)
 960                 goto err;
 961         fd = ret;
 962         if (listen(fd , 5) < 0) {
 963                 ret = -ERRNO_TO_PARA_ERROR(errno);
 964                 goto err;
 965         }
 966         ret = mark_fd_nonblocking(fd);
 967         if (ret < 0)
 968                 goto err;
 969         return fd;
 970 err:
 971         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 972         exit(EXIT_FAILURE);
 973 }
 974
 975 static void signal_pre_select(struct sched *s, struct task *t)
 976 {
 977         struct signal_task *st = container_of(t, struct signal_task, task);
 978         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 979 }
 980
 981 static void signal_post_select(struct sched *s, struct task *t)
 982 {
 983         struct signal_task *st = container_of(t, struct signal_task, task);
 984
 985         if (!FD_ISSET(st->fd, &s->rfds))
 986                 return;
 987
 988         st->signum = para_next_signal();
 989         switch (st->signum) {
 990         case SIGINT:
 991         case SIGTERM:
 992         case SIGHUP:
 993                 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
 994                 clean_exit(EXIT_FAILURE, "caught deadly signal");
 995         }
 996 }
 997
 998 static void signal_setup_default(struct signal_task *st)
 999 {
1000         st->task.pre_select = signal_pre_select;
1001         st->task.post_select = signal_post_select;
1002         sprintf(st->task.status, "signal task");
1003 }
1004
1005 static void command_pre_select(struct sched *s, struct task *t)
1006 {
1007         struct command_task *ct = container_of(t, struct command_task, task);
1008         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1009 }
1010
1011 static void command_post_select(struct sched *s, struct task *t)
1012 {
1013         int ret;
1014         struct command_task *ct = container_of(t, struct command_task, task);
1015         static struct timeval last_status_dump;
1016         struct timeval tmp, delay = {0, 500 * 1000};
1017
1018         tv_add(&last_status_dump, &delay, &tmp);
1019         if (tv_diff(&tmp, now, NULL) < 0) {
1020                 audiod_status_dump();
1021                 last_status_dump = *now;
1022         }
1023
1024         if (!FD_ISSET(ct->fd, &s->rfds))
1025                 return;
1026         ret = handle_connect(ct->fd);
1027         if (ret < 0)
1028                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1029 }
1030
1031 static void init_command_task(struct command_task *ct)
1032 {
1033         ct->task.pre_select = command_pre_select;
1034         ct->task.post_select = command_post_select;
1035         ct->task.error = 0;
1036         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1037         sprintf(ct->task.status, "command task");
1038 }
1039
1040 static void close_stat_pipe(void)
1041 {
1042         if (!stat_task->ct)
1043                 return;
1044         btr_free_node(stat_task->ct->btrn);
1045         client_close(stat_task->ct);
1046         stat_task->ct = NULL;
1047         clear_and_dump_items();
1048         stat_task->length_seconds = 0;
1049         stat_task->offset_seconds = 0;
1050         stat_task->vss_status = 0;
1051         stat_task->current_audio_format_num = -1;
1052         audiod_status_dump();
1053 }
1054
1055 /**
1056  * close the connection to para_server and exit
1057  *
1058  * \param status the exit status which is passed to exit(3)
1059  * \param msg the log message
1060  *
1061  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1062  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1063  * EXIT_FAILURE.
1064  *
1065  * \sa exit(3)
1066  */
1067 void __noreturn clean_exit(int status, const char *msg)
1068 {
1069         PARA_EMERG_LOG("%s\n", msg);
1070         if (socket_name)
1071                 unlink(socket_name);
1072         close_stat_pipe();
1073         exit(status);
1074 }
1075
1076 /* avoid busy loop if server is down */
1077 static void set_stat_task_restart_barrier(unsigned seconds)
1078 {
1079         struct timeval delay = {seconds, 0};
1080         tv_add(now, &delay, &stat_task->restart_barrier);
1081 }
1082
1083 static void try_to_close_slot(int slot_num)
1084 {
1085         struct slot_info *s = &slot[slot_num];
1086         struct audio_format_info *a = afi + s->format;
1087         int i;
1088
1089         if (s->format < 0)
1090                 return;
1091         if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
1092                 return;
1093         for (i = 0; i < a->num_filters; i++)
1094                 if (s->fns && s->fns[i].task.error != -E_TASK_UNREGISTERED)
1095                         return;
1096         if (a->num_writers > 0) {
1097                 for (i = 0; i < a->num_writers; i++)
1098                         if (s->wns && s->wns[i].task.error != -E_TASK_UNREGISTERED)
1099                                 return;
1100         } else {
1101                 if (s->wns && s->wns[0].task.error != -E_TASK_UNREGISTERED)
1102                         return;
1103         }
1104         PARA_INFO_LOG("closing slot %d\n", slot_num);
1105         close_writers(s);
1106         close_filters(s);
1107         close_receiver(slot_num);
1108         clear_slot(slot_num);
1109 }
1110
1111 /*
1112  * Check if any receivers/filters/writers need to be started and do so if
1113  * necessary.
1114  */
1115 static void start_stop_decoders(void)
1116 {
1117         int i, ret;
1118         struct slot_info *sl;
1119         struct audio_format_info *a;
1120
1121         FOR_EACH_SLOT(i)
1122                 try_to_close_slot(i);
1123         if (audiod_status != AUDIOD_ON ||
1124                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1125                 return kill_all_decoders(-E_NOT_PLAYING);
1126         if (!must_start_decoder())
1127                 return;
1128         ret = open_receiver(stat_task->current_audio_format_num);
1129         if (ret < 0) {
1130                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1131                 return;
1132         }
1133         sl = slot + ret;
1134         a = afi + sl->format;
1135         if (a->num_filters)
1136                 open_filters(sl);
1137         open_writers(sl);
1138         activate_grab_clients();
1139         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1140 }
1141
1142 static void status_pre_select(struct sched *s, struct task *t)
1143 {
1144         struct status_task *st = container_of(t, struct status_task, task);
1145         int ret, cafn = stat_task->current_audio_format_num;
1146
1147         if (must_start_decoder())
1148                 goto min_delay;
1149         ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
1150         if (ret > 0)
1151                 goto min_delay;
1152         if (!st->ct)
1153                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1154         if (cafn >= 0)
1155                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1156         return;
1157 min_delay:
1158         sched_min_delay(s);
1159 }
1160
1161 /* restart the client task if necessary */
1162 static void status_post_select(__a_unused struct sched *s, struct task *t)
1163 {
1164         struct status_task *st = container_of(t, struct status_task, task);
1165
1166         if (audiod_status == AUDIOD_OFF) {
1167                 if (!st->ct)
1168                         goto out;
1169                 if (st->ct->task.error >= 0) {
1170                         kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
1171                         goto out;
1172                 }
1173                 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1174                         goto out;
1175                 close_stat_pipe();
1176                 st->clock_diff_count = conf.clock_diff_count_arg;
1177                 goto out;
1178         }
1179         if (st->ct) {
1180                 char *buf;
1181                 size_t sz;
1182                 int ret;
1183                 if (st->ct->task.error < 0) {
1184                         if (st->ct->task.error != -E_TASK_UNREGISTERED)
1185                                 goto out;
1186                         close_stat_pipe();
1187                         goto out;
1188                 }
1189                 if (st->ct->status != CL_RECEIVING)
1190                         goto out;
1191                 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1192                 if (ret <= 0) {
1193                         struct timeval diff;
1194                         tv_diff(now, &st->last_status_read, &diff);
1195                         if (diff.tv_sec > 61)
1196                                 kill_btrn(st->ct->btrn, &st->ct->task,
1197                                         -E_STATUS_TIMEOUT);
1198                         goto out;
1199                 }
1200                 btr_merge(st->btrn, st->min_iqs);
1201                 sz = btr_next_buffer(st->btrn, &buf);
1202                 ret = for_each_stat_item(buf, sz, update_item);
1203                 if (ret < 0) {
1204                         kill_btrn(st->ct->btrn, &st->ct->task, ret);
1205                         goto out;
1206                 }
1207                 if (sz != ret) {
1208                         btr_consume(st->btrn, sz - ret);
1209                         st->last_status_read = *now;
1210                         st->min_iqs = 0;
1211                 } else /* current status item crosses buffers */
1212                         st->min_iqs = sz + 1;
1213                 goto out;
1214         }
1215         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1216                 goto out;
1217         if (st->clock_diff_count) { /* get status only one time */
1218                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1219                 int argc = 5;
1220                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1221                 st->clock_diff_count--;
1222                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1223                 set_stat_task_restart_barrier(2);
1224
1225         } else {
1226                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1227                 int argc = 4;
1228                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1229                 set_stat_task_restart_barrier(5);
1230         }
1231         free(stat_item_values[SI_BASENAME]);
1232         stat_item_values[SI_BASENAME] = para_strdup(
1233                 "no connection to para_server");
1234         stat_client_write_item(SI_BASENAME);
1235         st->last_status_read = *now;
1236 out:
1237         start_stop_decoders();
1238 }
1239
1240 static void init_status_task(struct status_task *st)
1241 {
1242         memset(st, 0, sizeof(struct status_task));
1243         st->task.pre_select = status_pre_select;
1244         st->task.post_select = status_post_select;
1245         st->sa_time_diff_sign = 1;
1246         st->clock_diff_count = conf.clock_diff_count_arg;
1247         st->current_audio_format_num = -1;
1248         sprintf(st->task.status, "stat");
1249         st->btrn = btr_new_node(&(struct btr_node_description)
1250                 EMBRACE(.name = "stat"));
1251 }
1252
1253 static void set_initial_status(void)
1254 {
1255         audiod_status = AUDIOD_ON;
1256         if (!conf.mode_given)
1257                 return;
1258         if (!strcmp(conf.mode_arg, "sb")) {
1259                 audiod_status = AUDIOD_STANDBY;
1260                 return;
1261         }
1262         if (!strcmp(conf.mode_arg, "off")) {
1263                 audiod_status = AUDIOD_OFF;
1264                 return;
1265         }
1266         if (strcmp(conf.mode_arg, "on"))
1267                 PARA_WARNING_LOG("invalid mode\n");
1268 }
1269
1270 __noreturn static void print_help_and_die(void)
1271 {
1272         int d = conf.detailed_help_given;
1273         const char **p = d? audiod_args_info_detailed_help
1274                 : audiod_args_info_help;
1275
1276         printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1277                 AUDIOD_CMDLINE_PARSER_VERSION);
1278         printf_or_die("%s\n\n", audiod_args_info_usage);
1279         for (; *p; p++)
1280                 printf_or_die("%s\n", *p);
1281         print_receiver_helps(d);
1282         print_filter_helps(d);
1283         print_writer_helps(d);
1284         exit(0);
1285 }
1286
1287 static void init_colors_or_die(void)
1288 {
1289         int ret, i;
1290
1291         if (!want_colors())
1292                 return;
1293         daemon_set_default_log_colors();
1294         daemon_set_flag(DF_COLOR_LOG);
1295         for (i = 0; i < conf.log_color_given; i++) {
1296                 ret = daemon_set_log_color(conf.log_color_arg[i]);
1297                 if (ret < 0)
1298                         exit(EXIT_FAILURE);
1299         }
1300 }
1301
1302 /**
1303  * the main function of para_audiod
1304  *
1305  * \param argc usual argument count
1306  * \param argv usual argument vector
1307  *
1308  * \return EXIT_SUCCESS or EXIT_FAILURE
1309  *
1310  * \sa para_audiod(1)
1311  * */
1312 int main(int argc, char *argv[])
1313 {
1314         int ret, i;
1315         static struct sched s;
1316         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1317         struct audiod_cmdline_parser_params params = {
1318                 .override = 0,
1319                 .initialize = 1,
1320                 .check_required = 0,
1321                 .check_ambiguity = 0,
1322                 .print_errors = 1
1323         };
1324
1325         valid_fd_012();
1326         if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1327                 exit(EXIT_FAILURE);
1328         HANDLE_VERSION_FLAG("audiod", conf);
1329         /* init receivers/filters/writers early to make help work */
1330         recv_init();
1331         filter_init();
1332         writer_init();
1333         if (conf.help_given || conf.detailed_help_given)
1334                 print_help_and_die();
1335         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1336         parse_config_or_die();
1337         init_colors_or_die();
1338         init_random_seed_or_die();
1339         daemon_set_flag(DF_LOG_TIME);
1340         daemon_set_flag(DF_LOG_HOSTNAME);
1341         daemon_set_flag(DF_LOG_LL);
1342         if (conf.log_timing_given)
1343                 daemon_set_flag(DF_LOG_TIMING);
1344         if (conf.logfile_given) {
1345                 daemon_set_logfile(conf.logfile_arg);
1346                 daemon_open_log_or_die();
1347         }
1348         ret = parse_stream_args();
1349         if (ret < 0) {
1350                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1351                 exit(EXIT_FAILURE);
1352         }
1353         log_welcome("para_audiod");
1354         server_uptime(UPTIME_SET);
1355         set_initial_status();
1356         FOR_EACH_SLOT(i)
1357                 clear_slot(i);
1358         setup_signal_handling();
1359         signal_setup_default(sig_task);
1360
1361         init_status_task(stat_task);
1362         init_command_task(cmd_task);
1363
1364         if (conf.daemon_given)
1365                 daemonize();
1366
1367         register_task(&sig_task->task);
1368         register_task(&cmd_task->task);
1369         register_task(&stat_task->task);
1370         s.default_timeout.tv_sec = 2;
1371         s.default_timeout.tv_usec = 999 * 1000;
1372         ret = schedule(&s);
1373
1374         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1375         return EXIT_FAILURE;
1376 }