audiod.c

   1 /*
   2  * Copyright (C) 2005-2013 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
  12 #include "para.h"
  13 #include "error.h"
  14 #include "crypt.h"
  15 #include "audiod.cmdline.h"
  16 #include "list.h"
  17 #include "sched.h"
  18 #include "ggo.h"
  19 #include "buffer_tree.h"
  20 #include "recv.h"
  21 #include "filter.h"
  22 #include "grab_client.h"
  23 #include "client.cmdline.h"
  24 #include "client.h"
  25 #include "audiod.h"
  26 #include "net.h"
  27 #include "daemon.h"
  28 #include "string.h"
  29 #include "fd.h"
  30 #include "write.h"
  31 #include "write_common.h"
  32 #include "signal.h"
  33 #include "version.h"
  34
  35 __printf_2_3 void (*para_log)(int, const char*, ...) = daemon_log;
  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 DEFINE_RECEIVER_ARRAY;
  42
  43 /** Defines how audiod handles one supported audio format. */
  44 struct audio_format_info {
  45         /** pointer to the receiver for this audio format */
  46         struct receiver *receiver;
  47         /** the receiver configuration */
  48         void *receiver_conf;
  49         /** the number of filters that should be activated for this audio format */
  50         unsigned int num_filters;
  51         /** Array of filter numbers to be activated. */
  52         unsigned *filter_nums;
  53         /** Pointer to the array of filter configurations. */
  54         void **filter_conf;
  55         /** the number of filters that should be activated for this audio format */
  56         unsigned int num_writers;
  57         /** Array of writer numbers to be activated. */
  58         int *writer_nums;
  59         /** pointer to the array of writer configurations */
  60         void **writer_conf;
  61         /** do not start receiver/filters/writer before this time */
  62         struct timeval restart_barrier;
  63 };
  64
  65 /**
  66  * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
  67  * be associated with a receiver/filter/writer triple. This array holds all
  68  * information on the status of these slots.
  69  *
  70  * \sa struct slot_info
  71  * */
  72 struct slot_info slot[MAX_STREAM_SLOTS];
  73
  74 /** The vss status flags audiod is interested in. */
  75 enum vss_status_flags {
  76         /** Whether the 'N' flag is set. */
  77         VSS_STATUS_FLAG_NEXT = 1,
  78         /** The 'P' flag is set. */
  79         VSS_STATUS_FLAG_PLAYING = 2,
  80 };
  81
  82 /**
  83  * The scheduler instance of para_audiod.
  84  *
  85  * This is needed also in audiod_command.c (for the tasks command), so it can
  86  * not be made static.
  87  */
  88 struct sched sched = {.max_fileno = 0};
  89
  90 /**
  91  * The task for obtaining para_server's status (para_client stat).
  92  *
  93  * \sa struct task, struct sched.
  94  */
  95 struct status_task {
  96         /** The associated task structure of audiod. */
  97         struct task task;
  98         /** Client data associated with the stat task. */
  99         struct client_task *ct;
 100         /** Do not restart client command until this time. */
 101         struct timeval restart_barrier;
 102         /** Last time we received status data from para_server. */
 103         struct timeval last_status_read;
 104         size_t min_iqs;
 105         /** The offset value announced by para_server. */
 106         int offset_seconds;
 107         /** The length of the current audio file as announced by para_server. */
 108         int length_seconds;
 109         /** The start of the current stream from the view of para_server. */
 110         struct timeval server_stream_start;
 111         /** The average time deviation between para_server and para_audiod. */
 112         struct timeval sa_time_diff;
 113         /** Whether client time is ahead of server time. */
 114         int sa_time_diff_sign;
 115         /** The 'P' and the 'N' flags as announced by para_server. */
 116         enum vss_status_flags vss_status;
 117         /** Number of times the clock difference is to be checked. */
 118         unsigned clock_diff_count;
 119         /** When to start the next check for clock difference. */
 120         struct timeval clock_diff_barrier;
 121         /** Number of the audio format as announced by para_server. */
 122         int current_audio_format_num;
 123         /* The status task btrn is the child of the client task. */
 124         struct btr_node *btrn;
 125 };
 126
 127 /** The array of status items sent by para_server. */
 128 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 129
 130 /**
 131  * the current mode of operation of which can be changed by the on/off/cycle
 132  * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
 133  */
 134 int audiod_status = AUDIOD_ON;
 135
 136 /**
 137  * the gengetopt args_info struct that holds information on all command line
 138  * arguments
 139  */
 140 struct audiod_args_info conf;
 141
 142 static char *socket_name;
 143 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 144
 145 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
 146
 147 static struct status_task status_task_struct;
 148
 149 /**
 150  * the task that calls the status command of para_server
 151  *
 152  * \sa struct status_task
 153  */
 154 static struct status_task *stat_task = &status_task_struct;
 155
 156 /**
 157  * the task for handling audiod commands
 158  *
 159  * \sa struct task, struct sched
 160  */
 161 struct command_task {
 162         /** the local listening socket */
 163         int fd;
 164         /** the associated task structure */
 165         struct task task;
 166 };
 167
 168 /** iterate over all supported audio formats */
 169 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 170
 171 /**
 172  * Get the audio format number.
 173  *
 174  * \param name The name of the audio format.
 175  *
 176  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
 177  * \a name is not a supported audio format.
 178  */
 179 static int get_audio_format_num(const char *name)
 180 {
 181         int i;
 182
 183         while (para_isspace(*name))
 184                 name++;
 185         FOR_EACH_AUDIO_FORMAT(i)
 186                 if (!strcmp(name, audio_formats[i]))
 187                         return i;
 188         return -E_UNSUPPORTED_AUDIO_FORMAT;
 189 }
 190
 191 static int get_matching_audio_format_nums(const char *re)
 192 {
 193         int i, ret;
 194         regex_t preg;
 195
 196         ret = para_regcomp(&preg, re, REG_EXTENDED | REG_NOSUB);
 197         if (ret < 0)
 198                 return ret;
 199         ret = 0;
 200         FOR_EACH_AUDIO_FORMAT(i)
 201                 if (regexec(&preg, audio_formats[i], 0, NULL, 0) != REG_NOMATCH)
 202                         ret |= (1 << i);
 203         regfree(&preg);
 204         return ret;
 205 }
 206
 207 /**
 208  * Compute the play time based on information of the given slot.
 209  *
 210  * \param slot_num The slot number (negative means: no slot).
 211  *
 212  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 213  * from the status items received from para_server and the start time of the
 214  * (first) writer of the given slot.
 215  *
 216  * It has to to take into account that probably the stream was not started at
 217  * the beginning of the file, that the clock between the server and the client
 218  * host may differ and that playback of the stream was delayed, e.g. because
 219  * the prebuffer filter is used in the filter configuration of the given slot.
 220  *
 221  * If no writer is active in the given slot, or \a slot_num is negative
 222  * (indicating that para_audiod runs in standby mode), an approximation based
 223  * only on the status items is computed and the returned string is prefixed
 224  * with "~".
 225  *
 226  * \return A string that must be freed by the caller.
 227  */
 228 char *get_time_string(int slot_num)
 229 {
 230         int ret, seconds = 0, length;
 231         struct timeval *tmp, sum, sss, /* server stream start */
 232                 rstime, /* receiver start time */
 233                 wstime, /* writer start time */
 234                 wtime, /* now - writer start */
 235                 rskip; /* receiver start - sss */
 236         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 237         char *msg;
 238
 239         if (audiod_status == AUDIOD_OFF)
 240                 goto empty;
 241         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 242                 if (stat_task->length_seconds) /* paused */
 243                         return NULL;
 244                 goto empty; /* stopped */
 245         }
 246         if (audiod_status == AUDIOD_ON && !s)
 247                 goto empty;
 248         /*
 249          * Valid status items and playing, set length and tmp to the stream
 250          * start. We use the slot info and fall back to the info from current
 251          * status items if no slot info is available.
 252          */
 253         length = stat_task->length_seconds;
 254         tmp = &stat_task->server_stream_start;
 255         if (s && s->wns && s->wns[0].btrn) { /* writer active in this slot */
 256                 btr_get_node_start(s->wns[0].btrn, &wstime);
 257                 if (wstime.tv_sec != 0) { /* writer wrote something */
 258                         if (s->server_stream_start.tv_sec == 0) {
 259                                 /* copy status info to slot */
 260                                 s->server_stream_start = stat_task->server_stream_start;
 261                                 s->offset_seconds = stat_task->offset_seconds;
 262                                 s->seconds_total = stat_task->length_seconds;
 263                         }
 264                         length = s->seconds_total;
 265                         tmp = &s->server_stream_start;
 266                 }
 267         }
 268         if (stat_task->sa_time_diff_sign > 0)
 269                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 270         else
 271                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 272         if (!s || !s->wns || !s->wns[0].btrn) {
 273                 struct timeval diff;
 274                 tv_diff(now, &sss, &diff);
 275                 seconds = diff.tv_sec + stat_task->offset_seconds;
 276                 goto out;
 277         }
 278         tv_diff(now, &wstime, &wtime);
 279         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 280         seconds = s->offset_seconds;
 281         if (s->receiver_node->btrn) {
 282                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 283                 ret = tv_diff(&rstime, &sss, &rskip);
 284                 if (ret > 0) { /* audiod was started in the middle of the stream */
 285                         tv_add(&wtime, &rskip, &sum);
 286                         seconds += sum.tv_sec;
 287                 } else
 288                         seconds += wtime.tv_sec;
 289         } else
 290                 seconds += wtime.tv_sec;
 291 out:
 292         seconds = PARA_MIN(seconds, length);
 293         seconds = PARA_MAX(seconds, 0);
 294         msg = make_message(
 295                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 296                 s? "" : "~",
 297                 seconds / 60,
 298                 seconds % 60,
 299                 (length - seconds) / 60,
 300                 (length - seconds) % 60,
 301                 length? (seconds * 100 + length / 2) / length : 0,
 302                 length / 60,
 303                 length % 60
 304         );
 305         //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 306         return msg;
 307 empty:
 308         return para_strdup(NULL);
 309 }
 310
 311 static int want_colors(void)
 312 {
 313         if (conf.color_arg == color_arg_no)
 314                 return 0;
 315         if (conf.color_arg == color_arg_yes)
 316                 return 1;
 317         if (conf.logfile_given)
 318                 return 0;
 319         return isatty(STDERR_FILENO);
 320 }
 321
 322 static void parse_config_or_die(void)
 323 {
 324         int ret;
 325         char *config_file;
 326         struct audiod_cmdline_parser_params params = {
 327                 .override = 0,
 328                 .initialize = 0,
 329                 .check_required = 1,
 330                 .check_ambiguity = 0,
 331                 .print_errors = 1
 332         };
 333
 334         if (conf.config_file_given)
 335                 config_file = para_strdup(conf.config_file_arg);
 336         else {
 337                 char *home = para_homedir();
 338                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 339                 free(home);
 340         }
 341         ret = file_exists(config_file);
 342         if (conf.config_file_given && !ret) {
 343                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 344                 goto err;
 345         }
 346         if (ret) {
 347                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 348                 daemon_set_loglevel(conf.loglevel_arg);
 349         }
 350         free(config_file);
 351         return;
 352 err:
 353         free(config_file);
 354         exit(EXIT_FAILURE);
 355 }
 356
 357 static void setup_signal_handling(void)
 358 {
 359         sig_task->fd = para_signal_init();
 360         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 361         para_install_sighandler(SIGINT);
 362         para_install_sighandler(SIGTERM);
 363         para_install_sighandler(SIGHUP);
 364         para_sigaction(SIGPIPE, SIG_IGN);
 365 }
 366
 367 static void clear_slot(int slot_num)
 368 {
 369         struct slot_info *s = &slot[slot_num];
 370
 371         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 372         memset(s, 0, sizeof(struct slot_info));
 373         s->format = -1;
 374 }
 375
 376 static void close_receiver(int slot_num)
 377 {
 378         struct slot_info *s = &slot[slot_num];
 379         struct audio_format_info *a;
 380
 381         if (s->format < 0 || !s->receiver_node)
 382                 return;
 383         a = &afi[s->format];
 384         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 385                 audio_formats[s->format], slot_num);
 386         a->receiver->close(s->receiver_node);
 387         btr_remove_node(&s->receiver_node->btrn);
 388         free(s->receiver_node);
 389         s->receiver_node = NULL;
 390         tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
 391                 &a->restart_barrier);
 392 }
 393
 394 static void writer_cleanup(struct writer_node *wn)
 395 {
 396         struct writer *w;
 397
 398         if (!wn)
 399                 return;
 400         w = writers + wn->writer_num;
 401         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 402         w->close(wn);
 403         btr_remove_node(&wn->btrn);
 404 }
 405
 406 static void close_writers(struct slot_info *s)
 407 {
 408         struct audio_format_info *a;
 409         int i;
 410
 411         if (s->format < 0)
 412                 return;
 413         assert(s->wns);
 414         a = afi + s->format;
 415         if (a->num_writers == 0)
 416                 writer_cleanup(s->wns);
 417         else {
 418                 for (i = 0; i < a->num_writers; i++)
 419                         writer_cleanup(s->wns + i);
 420         }
 421         free(s->wns);
 422         s->wns = NULL;
 423 }
 424
 425 static void close_filters(struct slot_info *s)
 426 {
 427         int i;
 428         struct audio_format_info *a = afi + s->format;
 429         if (a->num_filters == 0)
 430                 return;
 431         for (i = 0; i < a->num_filters; i++) {
 432                 struct filter_node *fn = s->fns + i;
 433                 struct filter *f;
 434
 435                 if (!fn)
 436                         continue;
 437                 f = filters + fn->filter_num;
 438                 if (f->close)
 439                         f->close(fn);
 440                 btr_remove_node(&fn->btrn);
 441         }
 442         free(s->fns);
 443         s->fns = NULL;
 444 }
 445
 446 static void notify_receivers(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                 task_notify(&s->receiver_node->task, error);
 457         }
 458 }
 459
 460 static int get_empty_slot(void)
 461 {
 462         int i;
 463         struct slot_info *s;
 464
 465         FOR_EACH_SLOT(i) {
 466                 s = &slot[i];
 467                 if (s->format < 0) {
 468                         clear_slot(i);
 469                         return i;
 470                 }
 471                 if (s->wns || s->receiver_node || s->fns)
 472                         continue;
 473                 clear_slot(i);
 474                 return i;
 475         }
 476         return -E_NO_MORE_SLOTS;
 477 }
 478
 479 static void open_filters(struct slot_info *s)
 480 {
 481         struct audio_format_info *a = afi + s->format;
 482         struct filter_node *fn;
 483         int nf = a->num_filters;
 484         struct btr_node *parent;
 485         int i;
 486
 487         if (nf == 0)
 488                 return;
 489         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 490         assert(s->fns == NULL);
 491         s->fns = para_calloc(nf * sizeof(struct filter_node));
 492         parent = s->receiver_node->btrn;
 493         for (i = 0; i < nf; i++) {
 494                 struct filter *f = filters + a->filter_nums[i];
 495                 fn = s->fns + i;
 496                 fn->filter_num = a->filter_nums[i];
 497                 fn->conf = a->filter_conf[i];
 498                 fn->task.pre_select = f->pre_select;
 499                 fn->task.post_select = f->post_select;
 500                 fn->btrn = btr_new_node(&(struct btr_node_description)
 501                         EMBRACE(.name = f->name, .parent = parent,
 502                                 .handler = f->execute, .context = fn));
 503
 504                 f->open(fn);
 505                 register_task(&sched, &fn->task);
 506                 parent = fn->btrn;
 507                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 508                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 509                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 510         }
 511 }
 512
 513 static void open_writers(struct slot_info *s)
 514 {
 515         int i;
 516         struct audio_format_info *a = afi + s->format;
 517         struct writer_node *wn;
 518         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 519
 520         assert(s->wns == NULL);
 521         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 522                 * sizeof(struct writer_node));
 523         PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 524         for (i = 0; i < a->num_writers; i++) {
 525                 wn = s->wns + i;
 526                 wn->conf = a->writer_conf[i];
 527                 wn->writer_num = a->writer_nums[i];
 528                 register_writer_node(wn, parent, &sched);
 529         }
 530 }
 531
 532 /* returns slot num on success */
 533 static int open_receiver(int format)
 534 {
 535         struct audio_format_info *a = &afi[format];
 536         struct slot_info *s;
 537         int ret, slot_num;
 538         struct receiver *r = a->receiver;
 539         struct receiver_node *rn;
 540
 541         tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
 542         ret = get_empty_slot();
 543         if (ret < 0)
 544                 return ret;
 545         slot_num = ret;
 546         rn = para_calloc(sizeof(*rn));
 547         rn->receiver = r;
 548         rn->conf = a->receiver_conf;
 549         rn->btrn = btr_new_node(&(struct btr_node_description)
 550                 EMBRACE(.name = r->name, .context = rn));
 551         ret = r->open(rn);
 552         if (ret < 0) {
 553                 btr_remove_node(&rn->btrn);
 554                 free(rn);
 555                 return ret;
 556         }
 557         s = &slot[slot_num];
 558         s->format = format;
 559         s->receiver_node = rn;
 560         PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
 561                 audio_formats[format], r->name, slot_num);
 562         rn->task.pre_select = r->pre_select;
 563         rn->task.post_select = r->post_select;
 564         sprintf(rn->task.status, "%s receiver node", r->name);
 565         register_task(&sched, &rn->task);
 566         return slot_num;
 567 }
 568
 569 static bool receiver_running(void)
 570 {
 571         int i;
 572         long unsigned ss1 = stat_task->server_stream_start.tv_sec;
 573
 574         FOR_EACH_SLOT(i) {
 575                 struct slot_info *s = &slot[i];
 576                 long unsigned ss2 = s->server_stream_start.tv_sec;
 577
 578                 if (!s->receiver_node)
 579                         continue;
 580                 if (s->receiver_node->task.error >= 0)
 581                         return true;
 582                 if (ss1 == ss2)
 583                         return true;
 584         }
 585         return false;
 586 }
 587
 588 /**
 589  * Return the root node of the current buffer tree.
 590  *
 591  * This is only used for stream grabbing.
 592  *
 593  * \return \p NULL if no slot is currently active. If more than one buffer tree
 594  * exists, the node corresponding to the most recently started receiver is
 595  * returned.
 596  */
 597 struct btr_node *audiod_get_btr_root(void)
 598 {
 599         int i, newest_slot = -1;
 600         struct timeval newest_rstime = {0, 0};
 601
 602         FOR_EACH_SLOT(i) {
 603                 struct slot_info *s = &slot[i];
 604                 struct timeval rstime;
 605                 if (!s->receiver_node)
 606                         continue;
 607                 if (s->receiver_node->task.error < 0)
 608                         continue;
 609                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 610                 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
 611                         continue;
 612                 newest_rstime = rstime;
 613                 newest_slot = i;
 614         }
 615         if (newest_slot == -1)
 616                 return NULL;
 617         return slot[newest_slot].receiver_node->btrn;
 618 }
 619
 620 /* whether a new instance of a decoder should be started. */
 621 static bool must_start_decoder(void)
 622 {
 623         int cafn = stat_task->current_audio_format_num;
 624         unsigned vs = stat_task->vss_status;
 625
 626         if (audiod_status != AUDIOD_ON)
 627                 return false;
 628         if (cafn < 0)
 629                 return false;
 630         if (!stat_task->ct)
 631                 return false;
 632         if (vs & VSS_STATUS_FLAG_NEXT)
 633                 return false;
 634         if (!(vs & VSS_STATUS_FLAG_PLAYING))
 635                 return false;
 636         if (receiver_running())
 637                 return false;
 638         if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
 639                 return false;
 640         return true;
 641 }
 642
 643 static unsigned compute_time_diff(const struct timeval *status_time)
 644 {
 645         struct timeval tmp, diff;
 646         static unsigned count;
 647         int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
 648         const struct timeval max_deviation = {0, 500 * 1000};
 649         const int time_smooth = 5;
 650
 651         if (!status_time)
 652                 return count;
 653         sign = tv_diff(status_time, now, &diff);
 654 //              PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
 655 //                      sign, sa_time_diff_sign);
 656         if (!count) {
 657                 sa_time_diff_sign = sign;
 658                 stat_task->sa_time_diff = diff;
 659                 count++;
 660                 goto out;
 661         }
 662         if (count > 5) {
 663                 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
 664                 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
 665                         PARA_WARNING_LOG("time diff jump: %lims\n",
 666                                 s * tv2ms(&tmp));
 667         }
 668         count++;
 669         sa_time_diff_sign = tv_convex_combination(
 670                 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
 671                 count > 10? sign : sign * time_smooth, &diff,
 672                 &tmp);
 673         stat_task->sa_time_diff = tmp;
 674         PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
 675                 sign < 0? "-" : "+",
 676                 tv2ms(&diff),
 677                 sa_time_diff_sign < 0? "-" : "+",
 678                 tv2ms(&stat_task->sa_time_diff)
 679         );
 680 out:
 681         stat_task->sa_time_diff_sign = sa_time_diff_sign;
 682         return count;
 683 }
 684
 685 static int update_item(int itemnum, char *buf)
 686 {
 687         long unsigned sec, usec;
 688
 689         if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
 690                 return 1;
 691         free(stat_item_values[itemnum]);
 692         stat_item_values[itemnum] = para_strdup(buf);
 693         stat_client_write_item(itemnum);
 694         switch (itemnum) {
 695         case SI_STATUS_FLAGS:
 696                 stat_task->vss_status = 0;
 697                 if (strchr(buf, 'N'))
 698                         stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
 699                 if (strchr(buf, 'P'))
 700                         stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
 701                 break;
 702         case SI_OFFSET:
 703                 stat_task->offset_seconds = atoi(buf);
 704                 break;
 705         case SI_SECONDS_TOTAL:
 706                 stat_task->length_seconds = atoi(buf);
 707                 break;
 708         case SI_STREAM_START:
 709                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 710                         stat_task->server_stream_start.tv_sec = sec;
 711                         stat_task->server_stream_start.tv_usec = usec;
 712                 }
 713                 break;
 714         case SI_CURRENT_TIME:
 715                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 716                         struct timeval tv = {sec, usec};
 717                         compute_time_diff(&tv);
 718                 }
 719                 break;
 720         case SI_FORMAT:
 721                 stat_task->current_audio_format_num
 722                         = get_audio_format_num(buf);
 723         }
 724         return 1;
 725 }
 726
 727 static int parse_stream_command(const char *txt, char **cmd)
 728 {
 729         int ret, len;
 730         char *re, *p = strchr(txt, ':');
 731
 732         if (!p)
 733                 return -E_MISSING_COLON;
 734         *cmd = p + 1;
 735         len = p - txt;
 736         re = malloc(len + 1);
 737         strncpy(re, txt, len);
 738         re[len] = '\0';
 739         ret = get_matching_audio_format_nums(re);
 740         free(re);
 741         return ret;
 742 }
 743
 744 static int add_filter(int format, char *cmdline)
 745 {
 746         struct audio_format_info *a = &afi[format];
 747         int filter_num, nf = a->num_filters;
 748         void *cfg;
 749
 750         filter_num = check_filter_arg(cmdline, &cfg);
 751         if (filter_num < 0)
 752                 return filter_num;
 753         a->filter_conf = para_realloc(a->filter_conf,
 754                 (nf + 1) * sizeof(void *));
 755         a->filter_nums = para_realloc(a->filter_nums,
 756                 (nf + 1) * sizeof(unsigned));
 757         a->filter_nums[nf] = filter_num;
 758         a->filter_conf[nf] = cfg;
 759         a->num_filters++;
 760         PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
 761                 filters[filter_num].name);
 762         return filter_num;
 763 }
 764
 765 static int parse_writer_args(void)
 766 {
 767         int i, ret;
 768         char *cmd;
 769         struct audio_format_info *a;
 770
 771         for (i = 0; i < conf.writer_given; i++) {
 772                 void *wconf;
 773                 int j, nw, writer_num, af_mask;
 774
 775                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 776                 if (ret < 0)
 777                         return ret;
 778                 af_mask = ret;
 779                 FOR_EACH_AUDIO_FORMAT(j) {
 780                         a = afi + j;
 781                         if ((af_mask & (1 << j)) == 0) /* no match */
 782                                 continue;
 783                         wconf = check_writer_arg_or_die(cmd, &writer_num);
 784                         nw = a->num_writers;
 785                         a->writer_nums = para_realloc(a->writer_nums, (nw + 1) * sizeof(int));
 786                         a->writer_conf = para_realloc(a->writer_conf, (nw + 1) * sizeof(void *));
 787                         a->writer_nums[nw] = writer_num;
 788                         a->writer_conf[nw] = wconf;
 789                         PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[j],
 790                                 nw, writer_names[writer_num]);
 791                         a->num_writers++;
 792                 }
 793         }
 794         /* Use default writer for audio formats which are not yet set up. */
 795         FOR_EACH_AUDIO_FORMAT(i) {
 796                 void *writer_conf;
 797                 int writer_num;
 798                 a = afi + i;
 799                 if (a->num_writers > 0)
 800                         continue; /* already set up */
 801                 writer_conf = check_writer_arg_or_die(NULL, &writer_num);
 802                 a->writer_nums = para_malloc(sizeof(int));
 803                 a->writer_nums[0] = writer_num;
 804                 a->writer_conf = para_malloc(sizeof(void *));
 805                 a->writer_conf[0] = writer_conf;
 806                 a->num_writers = 1;
 807                 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats[i],
 808                         writer_names[writer_num]);
 809         }
 810         return 1;
 811 }
 812
 813 static int parse_receiver_args(void)
 814 {
 815         int i, ret, receiver_num;
 816         char *cmd = NULL;
 817         struct audio_format_info *a;
 818
 819         for (i = conf.receiver_given - 1; i >= 0; i--) {
 820                 char *arg;
 821                 int j, af_mask;
 822
 823                 ret = parse_stream_command(conf.receiver_arg[i], &arg);
 824                 if (ret < 0)
 825                         goto out;
 826                 af_mask = ret;
 827                 FOR_EACH_AUDIO_FORMAT(j) {
 828                         a = afi + j;
 829                         if ((af_mask & (1 << j)) == 0) /* no match */
 830                                 continue;
 831                         /*
 832                          * If multiple receivers are given for this audio format, the
 833                          * last one wins and we have to free the previous receiver
 834                          * config here. Since we are iterating backwards, the winning
 835                          * receiver arg is in fact the first one given.
 836                          */
 837                         if (a->receiver_conf)
 838                                 a->receiver->free_config(a->receiver_conf);
 839                         a->receiver_conf = check_receiver_arg(arg, &receiver_num);
 840                         ret = -E_RECV_SYNTAX;
 841                         if (!a->receiver_conf)
 842                                 goto out;
 843                         a->receiver = receivers + receiver_num;
 844                 }
 845         }
 846         /*
 847          * Use the first available receiver with no arguments for those audio
 848          * formats for which no receiver was specified.
 849          */
 850         cmd = para_strdup(receivers[0].name);
 851         FOR_EACH_AUDIO_FORMAT(i) {
 852                 a = &afi[i];
 853                 if (a->receiver_conf)
 854                         continue;
 855                 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
 856                 if (!a->receiver_conf)
 857                         return -E_RECV_SYNTAX;
 858                 a->receiver = &receivers[receiver_num];
 859         }
 860         FOR_EACH_AUDIO_FORMAT(i) {
 861                 a = afi + i;
 862                 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
 863                         audio_formats[i], a->receiver->name);
 864         }
 865         ret = 1;
 866 out:
 867         free(cmd);
 868         return ret;
 869 }
 870
 871 static int init_default_filters(void)
 872 {
 873         int i, ret = 1;
 874
 875         FOR_EACH_AUDIO_FORMAT(i) {
 876                 struct audio_format_info *a = &afi[i];
 877                 char *tmp;
 878                 int j;
 879
 880                 if (a->num_filters)
 881                         continue; /* no default -- nothing to to */
 882                 /*
 883                  * udp and dccp streams are fec-encoded, so add fecdec as the
 884                  * first filter.
 885                  */
 886                 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
 887                                 strcmp(afi[i].receiver->name, "dccp") == 0) {
 888                         tmp = para_strdup("fecdec");
 889                         add_filter(i, tmp);
 890                         free(tmp);
 891                         if (ret < 0)
 892                                 goto out;
 893                 }
 894                 /* add "dec" to audio format name */
 895                 tmp = make_message("%sdec", audio_formats[i]);
 896                 for (j = 0; filters[j].name; j++)
 897                         if (!strcmp(tmp, filters[j].name))
 898                                 break;
 899                 free(tmp);
 900                 ret = -E_UNSUPPORTED_FILTER;
 901                 if (!filters[j].name)
 902                         goto out;
 903                 tmp = para_strdup(filters[j].name);
 904                 ret = add_filter(i, tmp);
 905                 free(tmp);
 906                 if (ret < 0)
 907                         goto out;
 908                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 909                         filters[j].name);
 910         }
 911 out:
 912         return ret;
 913 }
 914
 915 static int parse_filter_args(void)
 916 {
 917         int i, j, ret, af_mask;
 918
 919         for (i = 0; i < conf.filter_given; i++) {
 920                 char *arg;
 921                 ret = parse_stream_command(conf.filter_arg[i], &arg);
 922                 if (ret < 0)
 923                         goto out;
 924                 af_mask = ret;
 925                 FOR_EACH_AUDIO_FORMAT(j) {
 926                         if ((af_mask & (1 << j)) == 0) /* no match */
 927                                 continue;
 928                         ret = add_filter(j, arg);
 929                         if (ret < 0)
 930                                 goto out;
 931                 }
 932         }
 933         ret = init_default_filters(); /* use default values for the rest */
 934 out:
 935         return ret;
 936 }
 937
 938 static int parse_stream_args(void)
 939 {
 940         int ret;
 941
 942         ret = parse_receiver_args();
 943         if (ret < 0)
 944                 return ret;
 945         ret = parse_filter_args();
 946         if (ret < 0)
 947                 return ret;
 948         ret = parse_writer_args();
 949         if (ret < 0)
 950                 return ret;
 951         return 1;
 952 }
 953
 954 /* does not unlink socket on errors */
 955 static int audiod_get_socket(void)
 956 {
 957         struct sockaddr_un unix_addr;
 958         int ret, fd;
 959
 960         if (conf.socket_given)
 961                 socket_name = para_strdup(conf.socket_arg);
 962         else {
 963                 char *hn = para_hostname();
 964                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 965                         hn);
 966                 free(hn);
 967         }
 968         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 969         if (conf.force_given)
 970                 unlink(socket_name);
 971         ret = create_local_socket(socket_name, &unix_addr,
 972                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 973         if (ret < 0)
 974                 goto err;
 975         fd = ret;
 976         if (listen(fd , 5) < 0) {
 977                 ret = -ERRNO_TO_PARA_ERROR(errno);
 978                 goto err;
 979         }
 980         ret = mark_fd_nonblocking(fd);
 981         if (ret < 0)
 982                 goto err;
 983         return fd;
 984 err:
 985         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 986         exit(EXIT_FAILURE);
 987 }
 988
 989 static void signal_pre_select(struct sched *s, struct task *t)
 990 {
 991         struct signal_task *st = container_of(t, struct signal_task, task);
 992         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 993 }
 994
 995 static int signal_post_select(struct sched *s, __a_unused struct task *t)
 996 {
 997         int signum;
 998
 999         signum = para_next_signal(&s->rfds);
1000         switch (signum) {
1001         case SIGINT:
1002         case SIGTERM:
1003         case SIGHUP:
1004                 PARA_EMERG_LOG("terminating on signal %d\n", signum);
1005                 clean_exit(EXIT_FAILURE, "caught deadly signal");
1006         }
1007         return 0;
1008 }
1009
1010 static void signal_setup_default(struct signal_task *st)
1011 {
1012         st->task.pre_select = signal_pre_select;
1013         st->task.post_select = signal_post_select;
1014         sprintf(st->task.status, "signal task");
1015 }
1016
1017 static void command_pre_select(struct sched *s, struct task *t)
1018 {
1019         struct command_task *ct = container_of(t, struct command_task, task);
1020         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1021 }
1022
1023 static int command_post_select(struct sched *s, struct task *t)
1024 {
1025         int ret;
1026         struct command_task *ct = container_of(t, struct command_task, task);
1027         static struct timeval last_status_dump;
1028         struct timeval tmp, delay = {0, 500 * 1000};
1029
1030         tv_add(&last_status_dump, &delay, &tmp);
1031         if (tv_diff(&tmp, now, NULL) < 0) {
1032                 audiod_status_dump();
1033                 last_status_dump = *now;
1034         }
1035
1036         ret = handle_connect(ct->fd, &s->rfds);
1037         if (ret < 0)
1038                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1039         audiod_status_dump();
1040         return 0;
1041 }
1042
1043 static void init_command_task(struct command_task *ct)
1044 {
1045         ct->task.pre_select = command_pre_select;
1046         ct->task.post_select = command_post_select;
1047         ct->task.error = 0;
1048         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1049         sprintf(ct->task.status, "command task");
1050 }
1051
1052 static void close_stat_pipe(void)
1053 {
1054         if (!stat_task->ct)
1055                 return;
1056         client_close(stat_task->ct);
1057         stat_task->ct = NULL;
1058         clear_and_dump_items();
1059         stat_task->length_seconds = 0;
1060         stat_task->offset_seconds = 0;
1061         stat_task->vss_status = 0;
1062         stat_task->current_audio_format_num = -1;
1063         audiod_status_dump();
1064 }
1065
1066 /**
1067  * close the connection to para_server and exit
1068  *
1069  * \param status the exit status which is passed to exit(3)
1070  * \param msg the log message
1071  *
1072  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1073  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1074  * EXIT_FAILURE.
1075  *
1076  * \sa exit(3)
1077  */
1078 void __noreturn clean_exit(int status, const char *msg)
1079 {
1080         PARA_EMERG_LOG("%s\n", msg);
1081         if (socket_name)
1082                 unlink(socket_name);
1083         close_stat_pipe();
1084         exit(status);
1085 }
1086
1087 /* avoid busy loop if server is down */
1088 static void set_stat_task_restart_barrier(unsigned seconds)
1089 {
1090         struct timeval delay = {seconds, 0};
1091         tv_add(now, &delay, &stat_task->restart_barrier);
1092 }
1093
1094 static bool must_close_slot(int slot_num)
1095 {
1096         struct slot_info *s = &slot[slot_num];
1097         struct audio_format_info *a = afi + s->format;
1098         int i;
1099
1100         if (s->format < 0)
1101                 return false;
1102         if (s->receiver_node && s->receiver_node->task.error >= 0)
1103                 return false;
1104         for (i = 0; i < a->num_filters; i++)
1105                 if (s->fns && s->fns[i].task.error >= 0)
1106                         return false;
1107         if (a->num_writers > 0) {
1108                 for (i = 0; i < a->num_writers; i++)
1109                         if (s->wns && s->wns[i].task.error >= 0)
1110                                 return false;
1111         } else {
1112                 if (s->wns && s->wns[0].task.error >= 0)
1113                         return false;
1114         }
1115         return true;
1116 }
1117
1118 static void close_unused_slots(void)
1119 {
1120         int i;
1121
1122         FOR_EACH_SLOT(i) {
1123                 struct slot_info *s = slot + i;
1124                 if (!must_close_slot(i))
1125                         continue;
1126                 PARA_INFO_LOG("closing slot %d\n", i);
1127                 close_writers(s);
1128                 close_filters(s);
1129                 close_receiver(i);
1130                 clear_slot(i);
1131         }
1132 }
1133
1134 /*
1135  * Check if any receivers/filters/writers need to be started and do so if
1136  * necessary.
1137  */
1138 static void start_stop_decoders(void)
1139 {
1140         int ret;
1141         struct slot_info *sl;
1142         struct audio_format_info *a;
1143
1144         close_unused_slots();
1145         if (audiod_status != AUDIOD_ON ||
1146                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1147                 return notify_receivers(E_NOT_PLAYING);
1148         if (!must_start_decoder())
1149                 return;
1150         ret = open_receiver(stat_task->current_audio_format_num);
1151         if (ret < 0) {
1152                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1153                 return;
1154         }
1155         sl = slot + ret;
1156         a = afi + sl->format;
1157         if (a->num_filters)
1158                 open_filters(sl);
1159         open_writers(sl);
1160         activate_grab_clients(&sched);
1161         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1162 }
1163
1164 static void status_pre_select(struct sched *s, struct task *t)
1165 {
1166         struct status_task *st = container_of(t, struct status_task, task);
1167         int i, ret, cafn = stat_task->current_audio_format_num;
1168
1169         if (must_start_decoder())
1170                 goto min_delay;
1171         FOR_EACH_SLOT(i)
1172                 if (must_close_slot(i))
1173                         goto min_delay;
1174         ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1175         if (ret > 0)
1176                 goto min_delay;
1177         if (st->ct && audiod_status == AUDIOD_OFF)
1178                 goto min_delay;
1179         if (!st->ct && audiod_status != AUDIOD_OFF)
1180                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1181         if (cafn >= 0)
1182                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1183         /*
1184          * If para_server is playing we'd like to have a smooth time display
1185          * even if we are running in standby mode. So we request a timeout that
1186          * expires at the next full second.
1187          */
1188         if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1189                 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1190         return;
1191 min_delay:
1192         sched_min_delay(s);
1193 }
1194
1195 /* restart the client task if necessary */
1196 static int status_post_select(struct sched *s, struct task *t)
1197 {
1198         struct status_task *st = container_of(t, struct status_task, task);
1199
1200         if (audiod_status == AUDIOD_OFF) {
1201                 if (!st->ct)
1202                         goto out;
1203                 if (st->ct->task.error >= 0) {
1204                         task_notify(&st->ct->task, E_AUDIOD_OFF);
1205                         goto out;
1206                 }
1207                 close_stat_pipe();
1208                 st->clock_diff_count = conf.clock_diff_count_arg;
1209                 goto out;
1210         }
1211         if (st->ct) {
1212                 char *buf;
1213                 size_t sz;
1214                 int ret;
1215                 if (st->ct->task.error < 0) {
1216                         close_stat_pipe();
1217                         goto out;
1218                 }
1219                 if (st->ct->status != CL_RECEIVING)
1220                         goto out;
1221                 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1222                 if (ret <= 0) {
1223                         struct timeval diff;
1224                         tv_diff(now, &st->last_status_read, &diff);
1225                         if (diff.tv_sec > 61)
1226                                 task_notify(&st->ct->task, E_AUDIOD_OFF);
1227                         goto out;
1228                 }
1229                 btr_merge(st->btrn, st->min_iqs);
1230                 sz = btr_next_buffer(st->btrn, &buf);
1231                 ret = for_each_stat_item(buf, sz, update_item);
1232                 if (ret < 0) {
1233                         task_notify(&st->ct->task, E_AUDIOD_OFF);
1234                         goto out;
1235                 }
1236                 if (sz != ret) {
1237                         btr_consume(st->btrn, sz - ret);
1238                         st->last_status_read = *now;
1239                         st->min_iqs = 0;
1240                 } else /* current status item crosses buffers */
1241                         st->min_iqs = sz + 1;
1242                 goto out;
1243         }
1244         btr_drain(st->btrn);
1245         st->current_audio_format_num = -1;
1246         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1247                 goto out;
1248         if (st->clock_diff_count) { /* get status only one time */
1249                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1250                 int argc = 5;
1251                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1252                 st->clock_diff_count--;
1253                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1254                 set_stat_task_restart_barrier(2);
1255
1256         } else {
1257                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1258                 int argc = 4;
1259                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1260                 set_stat_task_restart_barrier(5);
1261         }
1262         free(stat_item_values[SI_BASENAME]);
1263         stat_item_values[SI_BASENAME] = para_strdup(
1264                 "no connection to para_server");
1265         stat_client_write_item(SI_BASENAME);
1266         st->last_status_read = *now;
1267 out:
1268         start_stop_decoders();
1269         return 0;
1270 }
1271
1272 static void init_status_task(struct status_task *st)
1273 {
1274         memset(st, 0, sizeof(struct status_task));
1275         st->task.pre_select = status_pre_select;
1276         st->task.post_select = status_post_select;
1277         st->sa_time_diff_sign = 1;
1278         st->clock_diff_count = conf.clock_diff_count_arg;
1279         st->current_audio_format_num = -1;
1280         sprintf(st->task.status, "stat");
1281         st->btrn = btr_new_node(&(struct btr_node_description)
1282                 EMBRACE(.name = "stat"));
1283 }
1284
1285 static void set_initial_status(void)
1286 {
1287         audiod_status = AUDIOD_ON;
1288         if (!conf.mode_given)
1289                 return;
1290         if (!strcmp(conf.mode_arg, "sb")) {
1291                 audiod_status = AUDIOD_STANDBY;
1292                 return;
1293         }
1294         if (!strcmp(conf.mode_arg, "off")) {
1295                 audiod_status = AUDIOD_OFF;
1296                 return;
1297         }
1298         if (strcmp(conf.mode_arg, "on"))
1299                 PARA_WARNING_LOG("invalid mode\n");
1300 }
1301
1302 __noreturn static void print_help_and_die(void)
1303 {
1304         int d = conf.detailed_help_given;
1305         const char **p = d? audiod_args_info_detailed_help
1306                 : audiod_args_info_help;
1307
1308         printf_or_die("%s\n\n", version_single_line("audiod"));
1309         printf_or_die("%s\n\n", audiod_args_info_usage);
1310         for (; *p; p++)
1311                 printf_or_die("%s\n", *p);
1312         print_receiver_helps(d);
1313         print_filter_helps(d);
1314         print_writer_helps(d);
1315         exit(0);
1316 }
1317
1318 static void init_colors_or_die(void)
1319 {
1320         int i;
1321
1322         if (!want_colors())
1323                 return;
1324         daemon_set_default_log_colors();
1325         daemon_set_flag(DF_COLOR_LOG);
1326         for (i = 0; i < conf.log_color_given; i++)
1327                 daemon_set_log_color_or_die(conf.log_color_arg[i]);
1328 }
1329
1330 /**
1331  * the main function of para_audiod
1332  *
1333  * \param argc usual argument count
1334  * \param argv usual argument vector
1335  *
1336  * \return EXIT_SUCCESS or EXIT_FAILURE
1337  *
1338  * \sa para_audiod(1)
1339  * */
1340 int main(int argc, char *argv[])
1341 {
1342         int ret, i;
1343         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1344         struct audiod_cmdline_parser_params params = {
1345                 .override = 0,
1346                 .initialize = 1,
1347                 .check_required = 0,
1348                 .check_ambiguity = 0,
1349                 .print_errors = 1
1350         };
1351
1352         valid_fd_012();
1353         audiod_cmdline_parser_ext(argc, argv, &conf, &params);
1354         daemon_set_loglevel(conf.loglevel_arg);
1355         version_handle_flag("audiod", conf.version_given);
1356         /* init receivers/filters/writers early to make help work */
1357         recv_init();
1358         filter_init();
1359         writer_init();
1360         if (conf.help_given || conf.detailed_help_given)
1361                 print_help_and_die();
1362         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1363         parse_config_or_die();
1364         init_colors_or_die();
1365         init_random_seed_or_die();
1366         daemon_set_flag(DF_LOG_TIME);
1367         daemon_set_flag(DF_LOG_HOSTNAME);
1368         daemon_set_flag(DF_LOG_LL);
1369         if (conf.log_timing_given)
1370                 daemon_set_flag(DF_LOG_TIMING);
1371         if (conf.logfile_given) {
1372                 daemon_set_logfile(conf.logfile_arg);
1373                 daemon_open_log_or_die();
1374         }
1375         ret = parse_stream_args();
1376         if (ret < 0) {
1377                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1378                 exit(EXIT_FAILURE);
1379         }
1380         log_welcome("para_audiod");
1381         set_server_start_time(NULL);
1382         set_initial_status();
1383         FOR_EACH_SLOT(i)
1384                 clear_slot(i);
1385         setup_signal_handling();
1386         signal_setup_default(sig_task);
1387
1388         init_status_task(stat_task);
1389         init_command_task(cmd_task);
1390
1391         if (conf.daemon_given)
1392                 daemonize(false /* parent exits immediately */);
1393
1394         register_task(&sched, &sig_task->task);
1395         register_task(&sched, &cmd_task->task);
1396         register_task(&sched, &stat_task->task);
1397         sched.default_timeout.tv_sec = 2;
1398         sched.default_timeout.tv_usec = 999 * 1000;
1399         ret = schedule(&sched);
1400
1401         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1402         return EXIT_FAILURE;
1403 }