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 static int get_matching_audio_format_nums(const char *re)
 182 {
 183         int i, ret;
 184         regex_t preg;
 185
 186         ret = para_regcomp(&preg, re, REG_EXTENDED | REG_NOSUB);
 187         if (ret < 0)
 188                 return ret;
 189         ret = 0;
 190         FOR_EACH_AUDIO_FORMAT(i)
 191                 if (regexec(&preg, audio_formats[i], 0, NULL, 0) != REG_NOMATCH)
 192                         ret |= (1 << i);
 193         regfree(&preg);
 194         return ret;
 195 }
 196
 197 /**
 198  * Compute the play time based on information of the given slot.
 199  *
 200  * \param slot_num The slot number (negative means: no slot).
 201  *
 202  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 203  * from the status items received from para_server and the start time of the
 204  * (first) writer of the given slot.
 205  *
 206  * It has to to take into account that probably the stream was not started at
 207  * the beginning of the file, that the clock between the server and the client
 208  * host may differ and that playback of the stream was delayed, e.g. because
 209  * the prebuffer filter is used in the filter configuration of the given slot.
 210  *
 211  * If no writer is active in the given slot, or \a slot_num is negative
 212  * (indicating that para_audiod runs in standby mode), an approximation based
 213  * only on the status items is computed and the returned string is prefixed
 214  * with "~".
 215  *
 216  * \return A string that must be freed by the caller.
 217  */
 218 char *get_time_string(int slot_num)
 219 {
 220         int ret, seconds = 0, length;
 221         struct timeval *tmp, sum, sss, /* server stream start */
 222                 rstime, /* receiver start time */
 223                 wstime, /* writer start time */
 224                 wtime, /* now - writer start */
 225                 rskip; /* receiver start - sss */
 226         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 227         char *msg;
 228
 229         if (audiod_status == AUDIOD_OFF)
 230                 goto empty;
 231         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 232                 if (stat_task->length_seconds) /* paused */
 233                         return NULL;
 234                 goto empty; /* stopped */
 235         }
 236         if (audiod_status == AUDIOD_ON && !s)
 237                 goto empty;
 238         /*
 239          * Valid status items and playing, set length and tmp to the stream
 240          * start. We use the slot info and fall back to the info from current
 241          * status items if no slot info is available.
 242          */
 243         length = stat_task->length_seconds;
 244         tmp = &stat_task->server_stream_start;
 245         if (s && s->wns) { /* writer active in this slot */
 246                 btr_get_node_start(s->wns[0].btrn, &wstime);
 247                 if (wstime.tv_sec != 0) { /* writer wrote something */
 248                         if (s->server_stream_start.tv_sec == 0) {
 249                                 /* copy status info to slot */
 250                                 s->server_stream_start = stat_task->server_stream_start;
 251                                 s->offset_seconds = stat_task->offset_seconds;
 252                                 s->seconds_total = stat_task->length_seconds;
 253                         }
 254                         length = s->seconds_total;
 255                         tmp = &s->server_stream_start;
 256                 }
 257         }
 258         if (stat_task->sa_time_diff_sign > 0)
 259                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 260         else
 261                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 262         if (!s || !s->wns) {
 263                 struct timeval diff;
 264                 tv_diff(now, &sss, &diff);
 265                 seconds = diff.tv_sec + stat_task->offset_seconds;
 266                 goto out;
 267         }
 268         tv_diff(now, &wstime, &wtime);
 269         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 270         seconds = s->offset_seconds;
 271         btr_get_node_start(s->receiver_node->btrn, &rstime);
 272         ret = tv_diff(&rstime, &sss, &rskip);
 273         if (ret > 0) { /* audiod was started in the middle of the stream */
 274                 tv_add(&wtime, &rskip, &sum);
 275                 seconds += sum.tv_sec;
 276         } else
 277                 seconds += wtime.tv_sec;
 278 out:
 279         seconds = PARA_MIN(seconds, length);
 280         seconds = PARA_MAX(seconds, 0);
 281         msg = make_message(
 282                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 283                 s? "" : "~",
 284                 seconds / 60,
 285                 seconds % 60,
 286                 (length - seconds) / 60,
 287                 (length - seconds) % 60,
 288                 length? (seconds * 100 + length / 2) / length : 0,
 289                 length / 60,
 290                 length % 60
 291         );
 292         //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 293         return msg;
 294 empty:
 295         return para_strdup(NULL);
 296 }
 297
 298 static int want_colors(void)
 299 {
 300         if (conf.color_arg == color_arg_no)
 301                 return 0;
 302         if (conf.color_arg == color_arg_yes)
 303                 return 1;
 304         if (conf.logfile_given)
 305                 return 0;
 306         return isatty(STDERR_FILENO);
 307 }
 308
 309 static void parse_config_or_die(void)
 310 {
 311         int ret;
 312         char *config_file;
 313         struct audiod_cmdline_parser_params params = {
 314                 .override = 0,
 315                 .initialize = 0,
 316                 .check_required = 1,
 317                 .check_ambiguity = 0,
 318                 .print_errors = 1
 319         };
 320
 321         if (conf.config_file_given)
 322                 config_file = para_strdup(conf.config_file_arg);
 323         else {
 324                 char *home = para_homedir();
 325                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 326                 free(home);
 327         }
 328         ret = file_exists(config_file);
 329         if (conf.config_file_given && !ret) {
 330                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 331                 goto err;
 332         }
 333         if (ret)
 334                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 335         free(config_file);
 336         daemon_set_loglevel(conf.loglevel_arg);
 337         return;
 338 err:
 339         free(config_file);
 340         exit(EXIT_FAILURE);
 341 }
 342
 343 static void setup_signal_handling(void)
 344 {
 345         sig_task->fd = para_signal_init();
 346         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 347         para_install_sighandler(SIGINT);
 348         para_install_sighandler(SIGTERM);
 349         para_install_sighandler(SIGHUP);
 350         para_sigaction(SIGPIPE, SIG_IGN);
 351 }
 352
 353 static void clear_slot(int slot_num)
 354 {
 355         struct slot_info *s = &slot[slot_num];
 356
 357         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 358         memset(s, 0, sizeof(struct slot_info));
 359         s->format = -1;
 360 }
 361
 362 static void close_receiver(int slot_num)
 363 {
 364         struct slot_info *s = &slot[slot_num];
 365         struct audio_format_info *a;
 366
 367         if (s->format < 0 || !s->receiver_node)
 368                 return;
 369         a = &afi[s->format];
 370         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 371                 audio_formats[s->format], slot_num);
 372         a->receiver->close(s->receiver_node);
 373         btr_free_node(s->receiver_node->btrn);
 374         free(s->receiver_node);
 375         s->receiver_node = NULL;
 376         tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
 377                 &a->restart_barrier);
 378 }
 379
 380 static void writer_cleanup(struct writer_node *wn)
 381 {
 382         struct writer *w;
 383
 384         if (!wn)
 385                 return;
 386         w = writers + wn->writer_num;
 387         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 388         w->close(wn);
 389         btr_free_node(wn->btrn);
 390 }
 391
 392 static void close_writers(struct slot_info *s)
 393 {
 394         struct audio_format_info *a;
 395         int i;
 396
 397         if (s->format < 0)
 398                 return;
 399         assert(s->wns);
 400         a = afi + s->format;
 401         if (a->num_writers == 0)
 402                 writer_cleanup(s->wns);
 403         else {
 404                 for (i = 0; i < a->num_writers; i++)
 405                         writer_cleanup(s->wns + i);
 406         }
 407         free(s->wns);
 408         s->wns = NULL;
 409 }
 410
 411 static void close_filters(struct slot_info *s)
 412 {
 413         int i;
 414         struct audio_format_info *a = afi + s->format;
 415         if (a->num_filters == 0)
 416                 return;
 417         for (i = 0; i < a->num_filters; i++) {
 418                 struct filter_node *fn = s->fns + i;
 419                 struct filter *f;
 420
 421                 if (!fn)
 422                         continue;
 423                 f = filters + fn->filter_num;
 424                 if (f->close)
 425                         f->close(fn);
 426                 btr_free_node(fn->btrn);
 427         }
 428         free(s->fns);
 429         s->fns = NULL;
 430 }
 431
 432 /*
 433  * Whenever a task commits suicide by returning from post_select with t->error
 434  * < 0, it also removes its btr node. We do exactly that to kill a running
 435  * task. Note that the scheduler checks t->error also _before_ each pre/post
 436  * select call, so the victim will never be scheduled again.
 437  */
 438 static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
 439 {
 440         if (t->error < 0)
 441                 return;
 442         t->error = error;
 443         btr_remove_node(btrn);
 444 }
 445
 446 static void kill_all_decoders(int error)
 447 {
 448         int i;
 449
 450         FOR_EACH_SLOT(i) {
 451                 struct slot_info *s = slot + i;
 452                 if (s->format < 0)
 453                         continue;
 454                 if (!s->receiver_node)
 455                         continue;
 456                 kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
 457                                 error);
 458         }
 459 }
 460
 461 static int get_empty_slot(void)
 462 {
 463         int i;
 464         struct slot_info *s;
 465
 466         FOR_EACH_SLOT(i) {
 467                 s = &slot[i];
 468                 if (s->format < 0) {
 469                         clear_slot(i);
 470                         return i;
 471                 }
 472                 if (s->wns || s->receiver_node || s->fns)
 473                         continue;
 474                 clear_slot(i);
 475                 return i;
 476         }
 477         return -E_NO_MORE_SLOTS;
 478 }
 479
 480 static void open_filters(struct slot_info *s)
 481 {
 482         struct audio_format_info *a = afi + s->format;
 483         struct filter_node *fn;
 484         int nf = a->num_filters;
 485         struct btr_node *parent;
 486         int i;
 487
 488         if (nf == 0)
 489                 return;
 490         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 491         assert(s->fns == NULL);
 492         s->fns = para_calloc(nf * sizeof(struct filter_node));
 493         parent = s->receiver_node->btrn;
 494         for (i = 0; i < nf; i++) {
 495                 struct filter *f = filters + a->filter_nums[i];
 496                 fn = s->fns + i;
 497                 fn->filter_num = a->filter_nums[i];
 498                 fn->conf = a->filter_conf[i];
 499                 fn->task.pre_select = f->pre_select;
 500                 fn->task.post_select = f->post_select;
 501
 502                 fn->btrn = btr_new_node(&(struct btr_node_description)
 503                         EMBRACE(.name = f->name, .parent = parent,
 504                                 .handler = f->execute, .context = fn));
 505
 506                 f->open(fn);
 507                 register_task(&fn->task);
 508                 parent = fn->btrn;
 509                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 510                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 511                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 512         }
 513 }
 514
 515 static void open_writers(struct slot_info *s)
 516 {
 517         int i;
 518         struct audio_format_info *a = afi + s->format;
 519         struct writer_node *wn;
 520         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 521
 522         assert(s->wns == NULL);
 523         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 524                 * sizeof(struct writer_node));
 525         PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 526         for (i = 0; i < a->num_writers; i++) {
 527                 wn = s->wns + i;
 528                 wn->conf = a->writer_conf[i];
 529                 wn->writer_num = a->writer_nums[i];
 530                 register_writer_node(wn, parent);
 531         }
 532 }
 533
 534 /* returns slot num on success */
 535 static int open_receiver(int format)
 536 {
 537         struct audio_format_info *a = &afi[format];
 538         struct slot_info *s;
 539         int ret, slot_num;
 540         struct receiver *r = a->receiver;
 541         struct receiver_node *rn;
 542
 543         tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
 544         ret = get_empty_slot();
 545         if (ret < 0)
 546                 return ret;
 547         slot_num = ret;
 548         rn = para_calloc(sizeof(*rn));
 549         rn->receiver = r;
 550         rn->conf = a->receiver_conf;
 551         rn->btrn = btr_new_node(&(struct btr_node_description)
 552                 EMBRACE(.name = r->name, .context = rn));
 553         ret = r->open(rn);
 554         if (ret < 0) {
 555                 btr_free_node(rn->btrn);
 556                 free(rn);
 557                 return ret;
 558         }
 559         s = &slot[slot_num];
 560         s->format = format;
 561         s->receiver_node = rn;
 562         PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
 563                 audio_formats[format], r->name, slot_num);
 564         rn->task.pre_select = r->pre_select;
 565         rn->task.post_select = r->post_select;
 566         sprintf(rn->task.status, "%s receiver node", r->name);
 567         register_task(&rn->task);
 568         return slot_num;
 569 }
 570
 571 static bool receiver_running(void)
 572 {
 573         int i;
 574         long unsigned ss1 = stat_task->server_stream_start.tv_sec;
 575
 576         FOR_EACH_SLOT(i) {
 577                 struct slot_info *s = &slot[i];
 578                 long unsigned ss2 = s->server_stream_start.tv_sec;
 579
 580                 if (!s->receiver_node)
 581                         continue;
 582                 if (s->receiver_node->task.error >= 0)
 583                         return true;
 584                 if (ss1 == ss2)
 585                         return true;
 586         }
 587         return false;
 588 }
 589
 590 /**
 591  * Return the root node of the current buffer tree.
 592  *
 593  * This is only used for stream grabbing.
 594  *
 595  * \return \p NULL if no slot is currently active. If more than one buffer tree
 596  * exists, the node corresponding to the most recently started receiver is
 597  * returned.
 598  */
 599 struct btr_node *audiod_get_btr_root(void)
 600 {
 601         int i, newest_slot = -1;
 602         struct timeval newest_rstime = {0, 0};
 603
 604         FOR_EACH_SLOT(i) {
 605                 struct slot_info *s = &slot[i];
 606                 struct timeval rstime;
 607                 if (!s->receiver_node)
 608                         continue;
 609                 if (s->receiver_node->task.error < 0)
 610                         continue;
 611                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 612                 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
 613                         continue;
 614                 newest_rstime = rstime;
 615                 newest_slot = i;
 616         }
 617         if (newest_slot == -1)
 618                 return NULL;
 619         return slot[newest_slot].receiver_node->btrn;
 620 }
 621
 622 /* whether a new instance of a decoder should be started. */
 623 static bool must_start_decoder(void)
 624 {
 625         int cafn = stat_task->current_audio_format_num;
 626         unsigned vs = stat_task->vss_status;
 627
 628         if (audiod_status != AUDIOD_ON)
 629                 return false;
 630         if (cafn < 0)
 631                 return false;
 632         if (!stat_task->ct)
 633                 return false;
 634         if (vs & VSS_STATUS_FLAG_NEXT)
 635                 return false;
 636         if (!(vs & VSS_STATUS_FLAG_PLAYING))
 637                 return false;
 638         if (receiver_running())
 639                 return false;
 640         if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
 641                 return false;
 642         return true;
 643 }
 644
 645 static unsigned compute_time_diff(const struct timeval *status_time)
 646 {
 647         struct timeval tmp, diff;
 648         static unsigned count;
 649         int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
 650         const struct timeval max_deviation = {0, 500 * 1000};
 651         const int time_smooth = 5;
 652
 653         if (!status_time)
 654                 return count;
 655         sign = tv_diff(status_time, now, &diff);
 656 //              PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
 657 //                      sign, sa_time_diff_sign);
 658         if (!count) {
 659                 sa_time_diff_sign = sign;
 660                 stat_task->sa_time_diff = diff;
 661                 count++;
 662                 goto out;
 663         }
 664         if (count > 5) {
 665                 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
 666                 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
 667                         PARA_WARNING_LOG("time diff jump: %lims\n",
 668                                 s * tv2ms(&tmp));
 669         }
 670         count++;
 671         sa_time_diff_sign = tv_convex_combination(
 672                 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
 673                 count > 10? sign : sign * time_smooth, &diff,
 674                 &tmp);
 675         stat_task->sa_time_diff = tmp;
 676         PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
 677                 sign < 0? "-" : "+",
 678                 tv2ms(&diff),
 679                 sa_time_diff_sign < 0? "-" : "+",
 680                 tv2ms(&stat_task->sa_time_diff)
 681         );
 682 out:
 683         stat_task->sa_time_diff_sign = sa_time_diff_sign;
 684         return count;
 685 }
 686
 687 static int update_item(int itemnum, char *buf)
 688 {
 689         long unsigned sec, usec;
 690
 691         if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
 692                 return 1;
 693         free(stat_item_values[itemnum]);
 694         stat_item_values[itemnum] = para_strdup(buf);
 695         stat_client_write_item(itemnum);
 696         switch (itemnum) {
 697         case SI_STATUS_FLAGS:
 698                 stat_task->vss_status = 0;
 699                 if (strchr(buf, 'N'))
 700                         stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
 701                 if (strchr(buf, 'P'))
 702                         stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
 703                 break;
 704         case SI_OFFSET:
 705                 stat_task->offset_seconds = atoi(buf);
 706                 break;
 707         case SI_SECONDS_TOTAL:
 708                 stat_task->length_seconds = atoi(buf);
 709                 break;
 710         case SI_STREAM_START:
 711                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 712                         stat_task->server_stream_start.tv_sec = sec;
 713                         stat_task->server_stream_start.tv_usec = usec;
 714                 }
 715                 break;
 716         case SI_CURRENT_TIME:
 717                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 718                         struct timeval tv = {sec, usec};
 719                         compute_time_diff(&tv);
 720                 }
 721                 break;
 722         case SI_FORMAT:
 723                 stat_task->current_audio_format_num
 724                         = get_audio_format_num(buf);
 725         }
 726         return 1;
 727 }
 728
 729 static int parse_stream_command(const char *txt, char **cmd)
 730 {
 731         int ret, len;
 732         char *re, *p = strchr(txt, ':');
 733
 734         if (!p)
 735                 return -E_MISSING_COLON;
 736         *cmd = p + 1;
 737         len = p - txt;
 738         re = malloc(len + 1);
 739         strncpy(re, txt, len);
 740         re[len] = '\0';
 741         ret = get_matching_audio_format_nums(re);
 742         free(re);
 743         return ret;
 744 }
 745
 746 static int add_filter(int format, char *cmdline)
 747 {
 748         struct audio_format_info *a = &afi[format];
 749         int filter_num, nf = a->num_filters;
 750         void *cfg;
 751
 752         filter_num = check_filter_arg(cmdline, &cfg);
 753         if (filter_num < 0)
 754                 return filter_num;
 755         a->filter_conf = para_realloc(a->filter_conf,
 756                 (nf + 1) * sizeof(void *));
 757         a->filter_nums = para_realloc(a->filter_nums,
 758                 (nf + 1) * sizeof(unsigned));
 759         a->filter_nums[nf] = filter_num;
 760         a->filter_conf[nf] = cfg;
 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;
 770         char *cmd;
 771         struct audio_format_info *a;
 772
 773         for (i = 0; i < conf.writer_given; i++) {
 774                 void *wconf;
 775                 int j, nw, writer_num, af_mask;
 776
 777                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 778                 if (ret < 0)
 779                         goto out;
 780                 af_mask = ret;
 781                 FOR_EACH_AUDIO_FORMAT(j) {
 782                         a = afi + j;
 783                         if ((af_mask & (1 << j)) == 0) /* no match */
 784                                 continue;
 785                         ret = -E_WRITE_COMMON_SYNTAX;
 786                         wconf = check_writer_arg(cmd, &writer_num);
 787                         if (!wconf)
 788                                 goto out;
 789                         nw = a->num_writers;
 790                         a->writer_nums = para_realloc(a->writer_nums, (nw + 1) * sizeof(int));
 791                         a->writer_conf = para_realloc(a->writer_conf, (nw + 1) * sizeof(void *));
 792                         a->writer_nums[nw] = writer_num;
 793                         a->writer_conf[nw] = wconf;
 794                         PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[j],
 795                                 nw, writer_names[writer_num]);
 796                         a->num_writers++;
 797                 }
 798         }
 799         /* Use default writer for audio formats which are not yet set up. */
 800         FOR_EACH_AUDIO_FORMAT(i) {
 801                 struct writer *w = writers + DEFAULT_WRITER;
 802                 a = afi + i;
 803                 if (a->num_writers > 0)
 804                         continue; /* already set up */
 805                 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats[i],
 806                         writer_names[DEFAULT_WRITER]);
 807                 a->writer_nums = para_malloc(sizeof(int));
 808                 a->writer_nums[0] = DEFAULT_WRITER;
 809                 a->writer_conf = para_malloc(sizeof(void *));
 810                 a->writer_conf[0] = w->parse_config_or_die("");
 811                 a->num_writers = 1;
 812         }
 813         ret = 1;
 814 out:
 815         return ret;
 816 }
 817
 818 static int parse_receiver_args(void)
 819 {
 820         int i, ret, receiver_num;
 821         char *cmd = NULL;
 822         struct audio_format_info *a;
 823
 824         for (i = conf.receiver_given - 1; i >= 0; i--) {
 825                 char *arg;
 826                 int j, af_mask;
 827
 828                 ret = parse_stream_command(conf.receiver_arg[i], &arg);
 829                 if (ret < 0)
 830                         goto out;
 831                 af_mask = ret;
 832                 FOR_EACH_AUDIO_FORMAT(j) {
 833                         a = afi + j;
 834                         if ((af_mask & (1 << j)) == 0) /* no match */
 835                                 continue;
 836                         /*
 837                          * If multiple receivers are given for this audio format, the
 838                          * last one wins and we have to free the previous receiver
 839                          * config here. Since we are iterating backwards, the winning
 840                          * receiver arg is in fact the first one given.
 841                          */
 842                         if (a->receiver_conf)
 843                                 a->receiver->free_config(a->receiver_conf);
 844                         a->receiver_conf = check_receiver_arg(arg, &receiver_num);
 845                         ret = -E_RECV_SYNTAX;
 846                         if (!a->receiver_conf)
 847                                 goto out;
 848                         a->receiver = receivers + receiver_num;
 849                 }
 850         }
 851         /*
 852          * Use the first available receiver with no arguments for those audio
 853          * formats for which no receiver was specified.
 854          */
 855         cmd = para_strdup(receivers[0].name);
 856         FOR_EACH_AUDIO_FORMAT(i) {
 857                 a = &afi[i];
 858                 if (a->receiver_conf)
 859                         continue;
 860                 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
 861                 if (!a->receiver_conf)
 862                         return -E_RECV_SYNTAX;
 863                 a->receiver = &receivers[receiver_num];
 864         }
 865         FOR_EACH_AUDIO_FORMAT(i) {
 866                 a = afi + i;
 867                 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
 868                         audio_formats[i], a->receiver->name);
 869         }
 870         ret = 1;
 871 out:
 872         free(cmd);
 873         return ret;
 874 }
 875
 876 static int init_default_filters(void)
 877 {
 878         int i, ret = 1;
 879
 880         FOR_EACH_AUDIO_FORMAT(i) {
 881                 struct audio_format_info *a = &afi[i];
 882                 char *tmp;
 883                 int j;
 884
 885                 if (a->num_filters)
 886                         continue; /* no default -- nothing to to */
 887                 /*
 888                  * udp and dccp streams are fec-encoded, so add fecdec as the
 889                  * first filter.
 890                  */
 891                 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
 892                                 strcmp(afi[i].receiver->name, "dccp") == 0) {
 893                         tmp = para_strdup("fecdec");
 894                         add_filter(i, tmp);
 895                         free(tmp);
 896                         if (ret < 0)
 897                                 goto out;
 898                 }
 899                 /* add "dec" to audio format name */
 900                 tmp = make_message("%sdec", audio_formats[i]);
 901                 for (j = 0; filters[j].name; j++)
 902                         if (!strcmp(tmp, filters[j].name))
 903                                 break;
 904                 free(tmp);
 905                 ret = -E_UNSUPPORTED_FILTER;
 906                 if (!filters[j].name)
 907                         goto out;
 908                 tmp = para_strdup(filters[j].name);
 909                 ret = add_filter(i, tmp);
 910                 free(tmp);
 911                 if (ret < 0)
 912                         goto out;
 913                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 914                         filters[j].name);
 915         }
 916 out:
 917         return ret;
 918 }
 919
 920 static int parse_filter_args(void)
 921 {
 922         int i, j, ret, af_mask;
 923
 924         if (!conf.no_default_filters_given)
 925                 return init_default_filters();
 926         for (i = 0; i < conf.filter_given; i++) {
 927                 char *arg;
 928                 ret = parse_stream_command(conf.filter_arg[i], &arg);
 929                 if (ret < 0)
 930                         goto out;
 931                 af_mask = ret;
 932                 FOR_EACH_AUDIO_FORMAT(j) {
 933                         if ((af_mask & (1 << j)) == 0) /* no match */
 934                                 continue;
 935                         ret = add_filter(j, arg);
 936                         if (ret < 0)
 937                                 goto out;
 938                 }
 939         }
 940         ret = init_default_filters(); /* use default values for the rest */
 941 out:
 942         return ret;
 943 }
 944
 945 static int parse_stream_args(void)
 946 {
 947         int ret;
 948
 949         ret = parse_receiver_args();
 950         if (ret < 0)
 951                 return ret;
 952         ret = parse_filter_args();
 953         if (ret < 0)
 954                 return ret;
 955         ret = parse_writer_args();
 956         if (ret < 0)
 957                 return ret;
 958         return 1;
 959 }
 960
 961 /* does not unlink socket on errors */
 962 static int audiod_get_socket(void)
 963 {
 964         struct sockaddr_un unix_addr;
 965         int ret, fd;
 966
 967         if (conf.socket_given)
 968                 socket_name = para_strdup(conf.socket_arg);
 969         else {
 970                 char *hn = para_hostname();
 971                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 972                         hn);
 973                 free(hn);
 974         }
 975         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 976         if (conf.force_given)
 977                 unlink(socket_name);
 978         ret = create_local_socket(socket_name, &unix_addr,
 979                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 980         if (ret < 0)
 981                 goto err;
 982         fd = ret;
 983         if (listen(fd , 5) < 0) {
 984                 ret = -ERRNO_TO_PARA_ERROR(errno);
 985                 goto err;
 986         }
 987         ret = mark_fd_nonblocking(fd);
 988         if (ret < 0)
 989                 goto err;
 990         return fd;
 991 err:
 992         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 993         exit(EXIT_FAILURE);
 994 }
 995
 996 static void signal_pre_select(struct sched *s, struct task *t)
 997 {
 998         struct signal_task *st = container_of(t, struct signal_task, task);
 999         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1000 }
1001
1002 static void signal_post_select(struct sched *s, __a_unused struct task *t)
1003 {
1004         int signum;
1005
1006         signum = para_next_signal(&s->rfds);
1007         switch (signum) {
1008         case SIGINT:
1009         case SIGTERM:
1010         case SIGHUP:
1011                 PARA_EMERG_LOG("terminating on signal %d\n", signum);
1012                 clean_exit(EXIT_FAILURE, "caught deadly signal");
1013         }
1014 }
1015
1016 static void signal_setup_default(struct signal_task *st)
1017 {
1018         st->task.pre_select = signal_pre_select;
1019         st->task.post_select = signal_post_select;
1020         sprintf(st->task.status, "signal task");
1021 }
1022
1023 static void command_pre_select(struct sched *s, struct task *t)
1024 {
1025         struct command_task *ct = container_of(t, struct command_task, task);
1026         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1027 }
1028
1029 static void command_post_select(struct sched *s, struct task *t)
1030 {
1031         int ret;
1032         struct command_task *ct = container_of(t, struct command_task, task);
1033         static struct timeval last_status_dump;
1034         struct timeval tmp, delay = {0, 500 * 1000};
1035
1036         tv_add(&last_status_dump, &delay, &tmp);
1037         if (tv_diff(&tmp, now, NULL) < 0) {
1038                 audiod_status_dump();
1039                 last_status_dump = *now;
1040         }
1041
1042         ret = handle_connect(ct->fd, &s->rfds);
1043         if (ret < 0)
1044                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1045         audiod_status_dump();
1046 }
1047
1048 static void init_command_task(struct command_task *ct)
1049 {
1050         ct->task.pre_select = command_pre_select;
1051         ct->task.post_select = command_post_select;
1052         ct->task.error = 0;
1053         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1054         sprintf(ct->task.status, "command task");
1055 }
1056
1057 static void close_stat_pipe(void)
1058 {
1059         if (!stat_task->ct)
1060                 return;
1061         client_close(stat_task->ct);
1062         stat_task->ct = NULL;
1063         clear_and_dump_items();
1064         stat_task->length_seconds = 0;
1065         stat_task->offset_seconds = 0;
1066         stat_task->vss_status = 0;
1067         stat_task->current_audio_format_num = -1;
1068         audiod_status_dump();
1069 }
1070
1071 /**
1072  * close the connection to para_server and exit
1073  *
1074  * \param status the exit status which is passed to exit(3)
1075  * \param msg the log message
1076  *
1077  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1078  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1079  * EXIT_FAILURE.
1080  *
1081  * \sa exit(3)
1082  */
1083 void __noreturn clean_exit(int status, const char *msg)
1084 {
1085         PARA_EMERG_LOG("%s\n", msg);
1086         if (socket_name)
1087                 unlink(socket_name);
1088         close_stat_pipe();
1089         exit(status);
1090 }
1091
1092 /* avoid busy loop if server is down */
1093 static void set_stat_task_restart_barrier(unsigned seconds)
1094 {
1095         struct timeval delay = {seconds, 0};
1096         tv_add(now, &delay, &stat_task->restart_barrier);
1097 }
1098
1099 static void try_to_close_slot(int slot_num)
1100 {
1101         struct slot_info *s = &slot[slot_num];
1102         struct audio_format_info *a = afi + s->format;
1103         int i;
1104
1105         if (s->format < 0)
1106                 return;
1107         if (s->receiver_node && s->receiver_node->task.error >= 0)
1108                 return;
1109         for (i = 0; i < a->num_filters; i++)
1110                 if (s->fns && s->fns[i].task.error >= 0)
1111                         return;
1112         if (a->num_writers > 0) {
1113                 for (i = 0; i < a->num_writers; i++)
1114                         if (s->wns && s->wns[i].task.error >= 0)
1115                                 return;
1116         } else {
1117                 if (s->wns && s->wns[0].task.error >= 0)
1118                         return;
1119         }
1120         PARA_INFO_LOG("closing slot %d\n", slot_num);
1121         close_writers(s);
1122         close_filters(s);
1123         close_receiver(slot_num);
1124         clear_slot(slot_num);
1125 }
1126
1127 /*
1128  * Check if any receivers/filters/writers need to be started and do so if
1129  * necessary.
1130  */
1131 static void start_stop_decoders(void)
1132 {
1133         int i, ret;
1134         struct slot_info *sl;
1135         struct audio_format_info *a;
1136
1137         FOR_EACH_SLOT(i)
1138                 try_to_close_slot(i);
1139         if (audiod_status != AUDIOD_ON ||
1140                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1141                 return kill_all_decoders(-E_NOT_PLAYING);
1142         if (!must_start_decoder())
1143                 return;
1144         ret = open_receiver(stat_task->current_audio_format_num);
1145         if (ret < 0) {
1146                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1147                 return;
1148         }
1149         sl = slot + ret;
1150         a = afi + sl->format;
1151         if (a->num_filters)
1152                 open_filters(sl);
1153         open_writers(sl);
1154         activate_grab_clients();
1155         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1156 }
1157
1158 static void status_pre_select(struct sched *s, struct task *t)
1159 {
1160         struct status_task *st = container_of(t, struct status_task, task);
1161         int ret, cafn = stat_task->current_audio_format_num;
1162
1163         if (must_start_decoder())
1164                 goto min_delay;
1165         ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
1166         if (ret > 0)
1167                 goto min_delay;
1168         if (st->ct && audiod_status == AUDIOD_OFF)
1169                 goto min_delay;
1170         if (!st->ct && audiod_status != AUDIOD_OFF)
1171                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1172         if (cafn >= 0)
1173                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1174         /*
1175          * If para_server is playing we'd like to have a smooth time display
1176          * even if we are running in standby mode. So we request a timeout that
1177          * expires at the next full second.
1178          */
1179         if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1180                 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1181         return;
1182 min_delay:
1183         sched_min_delay(s);
1184 }
1185
1186 /* restart the client task if necessary */
1187 static void status_post_select(__a_unused struct sched *s, struct task *t)
1188 {
1189         struct status_task *st = container_of(t, struct status_task, task);
1190
1191         if (audiod_status == AUDIOD_OFF) {
1192                 if (!st->ct)
1193                         goto out;
1194                 if (st->ct->task.error >= 0) {
1195                         kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
1196                         goto out;
1197                 }
1198                 if (st->ct->task.error >= 0)
1199                         goto out;
1200                 close_stat_pipe();
1201                 st->clock_diff_count = conf.clock_diff_count_arg;
1202                 goto out;
1203         }
1204         if (st->ct) {
1205                 char *buf;
1206                 size_t sz;
1207                 int ret;
1208                 if (st->ct->task.error < 0) {
1209                         if (st->ct->task.error >= 0)
1210                                 goto out;
1211                         close_stat_pipe();
1212                         goto out;
1213                 }
1214                 if (st->ct->status != CL_RECEIVING)
1215                         goto out;
1216                 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1217                 if (ret <= 0) {
1218                         struct timeval diff;
1219                         tv_diff(now, &st->last_status_read, &diff);
1220                         if (diff.tv_sec > 61)
1221                                 kill_btrn(st->ct->btrn, &st->ct->task,
1222                                         -E_STATUS_TIMEOUT);
1223                         goto out;
1224                 }
1225                 btr_merge(st->btrn, st->min_iqs);
1226                 sz = btr_next_buffer(st->btrn, &buf);
1227                 ret = for_each_stat_item(buf, sz, update_item);
1228                 if (ret < 0) {
1229                         kill_btrn(st->ct->btrn, &st->ct->task, ret);
1230                         goto out;
1231                 }
1232                 if (sz != ret) {
1233                         btr_consume(st->btrn, sz - ret);
1234                         st->last_status_read = *now;
1235                         st->min_iqs = 0;
1236                 } else /* current status item crosses buffers */
1237                         st->min_iqs = sz + 1;
1238                 goto out;
1239         }
1240         btr_drain(st->btrn);
1241         st->current_audio_format_num = -1;
1242         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1243                 goto out;
1244         if (st->clock_diff_count) { /* get status only one time */
1245                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1246                 int argc = 5;
1247                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1248                 st->clock_diff_count--;
1249                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1250                 set_stat_task_restart_barrier(2);
1251
1252         } else {
1253                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1254                 int argc = 4;
1255                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1256                 set_stat_task_restart_barrier(5);
1257         }
1258         free(stat_item_values[SI_BASENAME]);
1259         stat_item_values[SI_BASENAME] = para_strdup(
1260                 "no connection to para_server");
1261         stat_client_write_item(SI_BASENAME);
1262         st->last_status_read = *now;
1263 out:
1264         start_stop_decoders();
1265 }
1266
1267 static void init_status_task(struct status_task *st)
1268 {
1269         memset(st, 0, sizeof(struct status_task));
1270         st->task.pre_select = status_pre_select;
1271         st->task.post_select = status_post_select;
1272         st->sa_time_diff_sign = 1;
1273         st->clock_diff_count = conf.clock_diff_count_arg;
1274         st->current_audio_format_num = -1;
1275         sprintf(st->task.status, "stat");
1276         st->btrn = btr_new_node(&(struct btr_node_description)
1277                 EMBRACE(.name = "stat"));
1278 }
1279
1280 static void set_initial_status(void)
1281 {
1282         audiod_status = AUDIOD_ON;
1283         if (!conf.mode_given)
1284                 return;
1285         if (!strcmp(conf.mode_arg, "sb")) {
1286                 audiod_status = AUDIOD_STANDBY;
1287                 return;
1288         }
1289         if (!strcmp(conf.mode_arg, "off")) {
1290                 audiod_status = AUDIOD_OFF;
1291                 return;
1292         }
1293         if (strcmp(conf.mode_arg, "on"))
1294                 PARA_WARNING_LOG("invalid mode\n");
1295 }
1296
1297 __noreturn static void print_help_and_die(void)
1298 {
1299         int d = conf.detailed_help_given;
1300         const char **p = d? audiod_args_info_detailed_help
1301                 : audiod_args_info_help;
1302
1303         printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1304                 AUDIOD_CMDLINE_PARSER_VERSION);
1305         printf_or_die("%s\n\n", audiod_args_info_usage);
1306         for (; *p; p++)
1307                 printf_or_die("%s\n", *p);
1308         print_receiver_helps(d);
1309         print_filter_helps(d);
1310         print_writer_helps(d);
1311         exit(0);
1312 }
1313
1314 static void init_colors_or_die(void)
1315 {
1316         int i;
1317
1318         if (!want_colors())
1319                 return;
1320         daemon_set_default_log_colors();
1321         daemon_set_flag(DF_COLOR_LOG);
1322         for (i = 0; i < conf.log_color_given; i++)
1323                 daemon_set_log_color_or_die(conf.log_color_arg[i]);
1324 }
1325
1326 /**
1327  * the main function of para_audiod
1328  *
1329  * \param argc usual argument count
1330  * \param argv usual argument vector
1331  *
1332  * \return EXIT_SUCCESS or EXIT_FAILURE
1333  *
1334  * \sa para_audiod(1)
1335  * */
1336 int main(int argc, char *argv[])
1337 {
1338         int ret, i;
1339         static struct sched s;
1340         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1341         struct audiod_cmdline_parser_params params = {
1342                 .override = 0,
1343                 .initialize = 1,
1344                 .check_required = 0,
1345                 .check_ambiguity = 0,
1346                 .print_errors = 1
1347         };
1348
1349         valid_fd_012();
1350         if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1351                 exit(EXIT_FAILURE);
1352         HANDLE_VERSION_FLAG("audiod", conf);
1353         /* init receivers/filters/writers early to make help work */
1354         recv_init();
1355         filter_init();
1356         writer_init();
1357         if (conf.help_given || conf.detailed_help_given)
1358                 print_help_and_die();
1359         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1360         parse_config_or_die();
1361         init_colors_or_die();
1362         init_random_seed_or_die();
1363         daemon_set_flag(DF_LOG_TIME);
1364         daemon_set_flag(DF_LOG_HOSTNAME);
1365         daemon_set_flag(DF_LOG_LL);
1366         if (conf.log_timing_given)
1367                 daemon_set_flag(DF_LOG_TIMING);
1368         if (conf.logfile_given) {
1369                 daemon_set_logfile(conf.logfile_arg);
1370                 daemon_open_log_or_die();
1371         }
1372         ret = parse_stream_args();
1373         if (ret < 0) {
1374                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1375                 exit(EXIT_FAILURE);
1376         }
1377         log_welcome("para_audiod");
1378         server_uptime(UPTIME_SET);
1379         set_initial_status();
1380         FOR_EACH_SLOT(i)
1381                 clear_slot(i);
1382         setup_signal_handling();
1383         signal_setup_default(sig_task);
1384
1385         init_status_task(stat_task);
1386         init_command_task(cmd_task);
1387
1388         if (conf.daemon_given)
1389                 daemonize();
1390
1391         register_task(&sig_task->task);
1392         register_task(&cmd_task->task);
1393         register_task(&stat_task->task);
1394         s.default_timeout.tv_sec = 2;
1395         s.default_timeout.tv_usec = 999 * 1000;
1396         ret = schedule(&s);
1397
1398         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1399         return EXIT_FAILURE;
1400 }