audiod.c

   1 /*
   2  * Copyright (C) 2005-2012 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 "recv.h"
  20 #include "buffer_tree.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 /** 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 struct sched sched = {.max_fileno = 0};
  81
  82 /**
  83  * The task for obtaining para_server's status (para_client stat).
  84  *
  85  * \sa struct task, struct sched.
  86  */
  87 struct status_task {
  88         /** The associated task structure of audiod. */
  89         struct task task;
  90         /** Client data associated with the stat task. */
  91         struct client_task *ct;
  92         /** Do not restart client command until this time. */
  93         struct timeval restart_barrier;
  94         /** Last time we received status data from para_server. */
  95         struct timeval last_status_read;
  96         size_t min_iqs;
  97         /** The offset value announced by para_server. */
  98         int offset_seconds;
  99         /** The length of the current audio file as announced by para_server. */
 100         int length_seconds;
 101         /** The start of the current stream from the view of para_server. */
 102         struct timeval server_stream_start;
 103         /** The average time deviation between para_server and para_audiod. */
 104         struct timeval sa_time_diff;
 105         /** Whether client time is ahead of server time. */
 106         int sa_time_diff_sign;
 107         /** The 'P' and the 'N' flags as announced by para_server. */
 108         enum vss_status_flags vss_status;
 109         /** Number of times the clock difference is to be checked. */
 110         unsigned clock_diff_count;
 111         /** When to start the next check for clock difference. */
 112         struct timeval clock_diff_barrier;
 113         /** Number of the audio format as announced by para_server. */
 114         int current_audio_format_num;
 115         /* The status task btrn is the child of the client task. */
 116         struct btr_node *btrn;
 117 };
 118
 119 /** The array of status items sent by para_server. */
 120 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 121
 122 /**
 123  * the current mode of operation of which can be changed by the on/off/cycle
 124  * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
 125  */
 126 int audiod_status = AUDIOD_ON;
 127
 128 /**
 129  * the gengetopt args_info struct that holds information on all command line
 130  * arguments
 131  */
 132 struct audiod_args_info conf;
 133
 134 static char *socket_name;
 135 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 136
 137 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
 138
 139 static struct status_task status_task_struct;
 140
 141 /**
 142  * the task that calls the status command of para_server
 143  *
 144  * \sa struct status_task
 145  */
 146 static struct status_task *stat_task = &status_task_struct;
 147
 148 /**
 149  * the task for handling audiod commands
 150  *
 151  * \sa struct task, struct sched
 152  */
 153 struct command_task {
 154         /** the local listening socket */
 155         int fd;
 156         /** the associated task structure */
 157         struct task task;
 158 };
 159
 160 /** iterate over all supported audio formats */
 161 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 162
 163 /**
 164  * Get the audio format number.
 165  *
 166  * \param name The name of the audio format.
 167  *
 168  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
 169  * \a name is not a supported audio format.
 170  */
 171 static int get_audio_format_num(const char *name)
 172 {
 173         int i;
 174
 175         while (para_isspace(*name))
 176                 name++;
 177         FOR_EACH_AUDIO_FORMAT(i)
 178                 if (!strcmp(name, audio_formats[i]))
 179                         return i;
 180         return -E_UNSUPPORTED_AUDIO_FORMAT;
 181 }
 182
 183 static int get_matching_audio_format_nums(const char *re)
 184 {
 185         int i, ret;
 186         regex_t preg;
 187
 188         ret = para_regcomp(&preg, re, REG_EXTENDED | REG_NOSUB);
 189         if (ret < 0)
 190                 return ret;
 191         ret = 0;
 192         FOR_EACH_AUDIO_FORMAT(i)
 193                 if (regexec(&preg, audio_formats[i], 0, NULL, 0) != REG_NOMATCH)
 194                         ret |= (1 << i);
 195         regfree(&preg);
 196         return ret;
 197 }
 198
 199 /**
 200  * Compute the play time based on information of the given slot.
 201  *
 202  * \param slot_num The slot number (negative means: no slot).
 203  *
 204  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 205  * from the status items received from para_server and the start time of the
 206  * (first) writer of the given slot.
 207  *
 208  * It has to to take into account that probably the stream was not started at
 209  * the beginning of the file, that the clock between the server and the client
 210  * host may differ and that playback of the stream was delayed, e.g. because
 211  * the prebuffer filter is used in the filter configuration of the given slot.
 212  *
 213  * If no writer is active in the given slot, or \a slot_num is negative
 214  * (indicating that para_audiod runs in standby mode), an approximation based
 215  * only on the status items is computed and the returned string is prefixed
 216  * with "~".
 217  *
 218  * \return A string that must be freed by the caller.
 219  */
 220 char *get_time_string(int slot_num)
 221 {
 222         int ret, seconds = 0, length;
 223         struct timeval *tmp, sum, sss, /* server stream start */
 224                 rstime, /* receiver start time */
 225                 wstime, /* writer start time */
 226                 wtime, /* now - writer start */
 227                 rskip; /* receiver start - sss */
 228         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 229         char *msg;
 230
 231         if (audiod_status == AUDIOD_OFF)
 232                 goto empty;
 233         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 234                 if (stat_task->length_seconds) /* paused */
 235                         return NULL;
 236                 goto empty; /* stopped */
 237         }
 238         if (audiod_status == AUDIOD_ON && !s)
 239                 goto empty;
 240         /*
 241          * Valid status items and playing, set length and tmp to the stream
 242          * start. We use the slot info and fall back to the info from current
 243          * status items if no slot info is available.
 244          */
 245         length = stat_task->length_seconds;
 246         tmp = &stat_task->server_stream_start;
 247         if (s && s->wns) { /* writer active in this slot */
 248                 btr_get_node_start(s->wns[0].btrn, &wstime);
 249                 if (wstime.tv_sec != 0) { /* writer wrote something */
 250                         if (s->server_stream_start.tv_sec == 0) {
 251                                 /* copy status info to slot */
 252                                 s->server_stream_start = stat_task->server_stream_start;
 253                                 s->offset_seconds = stat_task->offset_seconds;
 254                                 s->seconds_total = stat_task->length_seconds;
 255                         }
 256                         length = s->seconds_total;
 257                         tmp = &s->server_stream_start;
 258                 }
 259         }
 260         if (stat_task->sa_time_diff_sign > 0)
 261                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 262         else
 263                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 264         if (!s || !s->wns) {
 265                 struct timeval diff;
 266                 tv_diff(now, &sss, &diff);
 267                 seconds = diff.tv_sec + stat_task->offset_seconds;
 268                 goto out;
 269         }
 270         tv_diff(now, &wstime, &wtime);
 271         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 272         seconds = s->offset_seconds;
 273         btr_get_node_start(s->receiver_node->btrn, &rstime);
 274         ret = tv_diff(&rstime, &sss, &rskip);
 275         if (ret > 0) { /* audiod was started in the middle of the stream */
 276                 tv_add(&wtime, &rskip, &sum);
 277                 seconds += sum.tv_sec;
 278         } else
 279                 seconds += wtime.tv_sec;
 280 out:
 281         seconds = PARA_MIN(seconds, length);
 282         seconds = PARA_MAX(seconds, 0);
 283         msg = make_message(
 284                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 285                 s? "" : "~",
 286                 seconds / 60,
 287                 seconds % 60,
 288                 (length - seconds) / 60,
 289                 (length - seconds) % 60,
 290                 length? (seconds * 100 + length / 2) / length : 0,
 291                 length / 60,
 292                 length % 60
 293         );
 294         //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 295         return msg;
 296 empty:
 297         return para_strdup(NULL);
 298 }
 299
 300 static int want_colors(void)
 301 {
 302         if (conf.color_arg == color_arg_no)
 303                 return 0;
 304         if (conf.color_arg == color_arg_yes)
 305                 return 1;
 306         if (conf.logfile_given)
 307                 return 0;
 308         return isatty(STDERR_FILENO);
 309 }
 310
 311 static void parse_config_or_die(void)
 312 {
 313         int ret;
 314         char *config_file;
 315         struct audiod_cmdline_parser_params params = {
 316                 .override = 0,
 317                 .initialize = 0,
 318                 .check_required = 1,
 319                 .check_ambiguity = 0,
 320                 .print_errors = 1
 321         };
 322
 323         if (conf.config_file_given)
 324                 config_file = para_strdup(conf.config_file_arg);
 325         else {
 326                 char *home = para_homedir();
 327                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 328                 free(home);
 329         }
 330         ret = file_exists(config_file);
 331         if (conf.config_file_given && !ret) {
 332                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 333                 goto err;
 334         }
 335         if (ret)
 336                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 337         free(config_file);
 338         daemon_set_loglevel(conf.loglevel_arg);
 339         return;
 340 err:
 341         free(config_file);
 342         exit(EXIT_FAILURE);
 343 }
 344
 345 static void setup_signal_handling(void)
 346 {
 347         sig_task->fd = para_signal_init();
 348         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 349         para_install_sighandler(SIGINT);
 350         para_install_sighandler(SIGTERM);
 351         para_install_sighandler(SIGHUP);
 352         para_sigaction(SIGPIPE, SIG_IGN);
 353 }
 354
 355 static void clear_slot(int slot_num)
 356 {
 357         struct slot_info *s = &slot[slot_num];
 358
 359         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 360         memset(s, 0, sizeof(struct slot_info));
 361         s->format = -1;
 362 }
 363
 364 static void close_receiver(int slot_num)
 365 {
 366         struct slot_info *s = &slot[slot_num];
 367         struct audio_format_info *a;
 368
 369         if (s->format < 0 || !s->receiver_node)
 370                 return;
 371         a = &afi[s->format];
 372         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 373                 audio_formats[s->format], slot_num);
 374         a->receiver->close(s->receiver_node);
 375         btr_free_node(s->receiver_node->btrn);
 376         free(s->receiver_node);
 377         s->receiver_node = NULL;
 378         tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
 379                 &a->restart_barrier);
 380 }
 381
 382 static void writer_cleanup(struct writer_node *wn)
 383 {
 384         struct writer *w;
 385
 386         if (!wn)
 387                 return;
 388         w = writers + wn->writer_num;
 389         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 390         w->close(wn);
 391         btr_free_node(wn->btrn);
 392 }
 393
 394 static void close_writers(struct slot_info *s)
 395 {
 396         struct audio_format_info *a;
 397         int i;
 398
 399         if (s->format < 0)
 400                 return;
 401         assert(s->wns);
 402         a = afi + s->format;
 403         if (a->num_writers == 0)
 404                 writer_cleanup(s->wns);
 405         else {
 406                 for (i = 0; i < a->num_writers; i++)
 407                         writer_cleanup(s->wns + i);
 408         }
 409         free(s->wns);
 410         s->wns = NULL;
 411 }
 412
 413 static void close_filters(struct slot_info *s)
 414 {
 415         int i;
 416         struct audio_format_info *a = afi + s->format;
 417         if (a->num_filters == 0)
 418                 return;
 419         for (i = 0; i < a->num_filters; i++) {
 420                 struct filter_node *fn = s->fns + i;
 421                 struct filter *f;
 422
 423                 if (!fn)
 424                         continue;
 425                 f = filters + fn->filter_num;
 426                 if (f->close)
 427                         f->close(fn);
 428                 btr_free_node(fn->btrn);
 429         }
 430         free(s->fns);
 431         s->fns = NULL;
 432 }
 433
 434 /*
 435  * Whenever a task commits suicide by returning from post_select with t->error
 436  * < 0, it also removes its btr node. We do exactly that to kill a running
 437  * task. Note that the scheduler checks t->error also _before_ each pre/post
 438  * select call, so the victim will never be scheduled again.
 439  */
 440 static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
 441 {
 442         if (t->error < 0)
 443                 return;
 444         t->error = error;
 445         btr_remove_node(btrn);
 446 }
 447
 448 static void kill_all_decoders(int error)
 449 {
 450         int i;
 451
 452         FOR_EACH_SLOT(i) {
 453                 struct slot_info *s = slot + i;
 454                 if (s->format < 0)
 455                         continue;
 456                 if (!s->receiver_node)
 457                         continue;
 458                 kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
 459                                 error);
 460         }
 461 }
 462
 463 static int get_empty_slot(void)
 464 {
 465         int i;
 466         struct slot_info *s;
 467
 468         FOR_EACH_SLOT(i) {
 469                 s = &slot[i];
 470                 if (s->format < 0) {
 471                         clear_slot(i);
 472                         return i;
 473                 }
 474                 if (s->wns || s->receiver_node || s->fns)
 475                         continue;
 476                 clear_slot(i);
 477                 return i;
 478         }
 479         return -E_NO_MORE_SLOTS;
 480 }
 481
 482 static void open_filters(struct slot_info *s)
 483 {
 484         struct audio_format_info *a = afi + s->format;
 485         struct filter_node *fn;
 486         int nf = a->num_filters;
 487         struct btr_node *parent;
 488         int i;
 489
 490         if (nf == 0)
 491                 return;
 492         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 493         assert(s->fns == NULL);
 494         s->fns = para_calloc(nf * sizeof(struct filter_node));
 495         parent = s->receiver_node->btrn;
 496         for (i = 0; i < nf; i++) {
 497                 struct filter *f = filters + a->filter_nums[i];
 498                 fn = s->fns + i;
 499                 fn->filter_num = a->filter_nums[i];
 500                 fn->conf = a->filter_conf[i];
 501                 fn->task.pre_select = f->pre_select;
 502                 fn->task.post_select = f->post_select;
 503
 504                 fn->btrn = btr_new_node(&(struct btr_node_description)
 505                         EMBRACE(.name = f->name, .parent = parent,
 506                                 .handler = f->execute, .context = fn));
 507
 508                 f->open(fn);
 509                 register_task(&sched, &fn->task);
 510                 parent = fn->btrn;
 511                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 512                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 513                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 514         }
 515 }
 516
 517 static void open_writers(struct slot_info *s)
 518 {
 519         int i;
 520         struct audio_format_info *a = afi + s->format;
 521         struct writer_node *wn;
 522         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 523
 524         assert(s->wns == NULL);
 525         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 526                 * sizeof(struct writer_node));
 527         PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 528         for (i = 0; i < a->num_writers; i++) {
 529                 wn = s->wns + i;
 530                 wn->conf = a->writer_conf[i];
 531                 wn->writer_num = a->writer_nums[i];
 532                 register_writer_node(wn, parent, &sched);
 533         }
 534 }
 535
 536 /* returns slot num on success */
 537 static int open_receiver(int format)
 538 {
 539         struct audio_format_info *a = &afi[format];
 540         struct slot_info *s;
 541         int ret, slot_num;
 542         struct receiver *r = a->receiver;
 543         struct receiver_node *rn;
 544
 545         tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
 546         ret = get_empty_slot();
 547         if (ret < 0)
 548                 return ret;
 549         slot_num = ret;
 550         rn = para_calloc(sizeof(*rn));
 551         rn->receiver = r;
 552         rn->conf = a->receiver_conf;
 553         rn->btrn = btr_new_node(&(struct btr_node_description)
 554                 EMBRACE(.name = r->name, .context = rn));
 555         ret = r->open(rn);
 556         if (ret < 0) {
 557                 btr_free_node(rn->btrn);
 558                 free(rn);
 559                 return ret;
 560         }
 561         s = &slot[slot_num];
 562         s->format = format;
 563         s->receiver_node = rn;
 564         PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
 565                 audio_formats[format], r->name, slot_num);
 566         rn->task.pre_select = r->pre_select;
 567         rn->task.post_select = r->post_select;
 568         sprintf(rn->task.status, "%s receiver node", r->name);
 569         register_task(&sched, &rn->task);
 570         return slot_num;
 571 }
 572
 573 static bool receiver_running(void)
 574 {
 575         int i;
 576         long unsigned ss1 = stat_task->server_stream_start.tv_sec;
 577
 578         FOR_EACH_SLOT(i) {
 579                 struct slot_info *s = &slot[i];
 580                 long unsigned ss2 = s->server_stream_start.tv_sec;
 581
 582                 if (!s->receiver_node)
 583                         continue;
 584                 if (s->receiver_node->task.error >= 0)
 585                         return true;
 586                 if (ss1 == ss2)
 587                         return true;
 588         }
 589         return false;
 590 }
 591
 592 /**
 593  * Return the root node of the current buffer tree.
 594  *
 595  * This is only used for stream grabbing.
 596  *
 597  * \return \p NULL if no slot is currently active. If more than one buffer tree
 598  * exists, the node corresponding to the most recently started receiver is
 599  * returned.
 600  */
 601 struct btr_node *audiod_get_btr_root(void)
 602 {
 603         int i, newest_slot = -1;
 604         struct timeval newest_rstime = {0, 0};
 605
 606         FOR_EACH_SLOT(i) {
 607                 struct slot_info *s = &slot[i];
 608                 struct timeval rstime;
 609                 if (!s->receiver_node)
 610                         continue;
 611                 if (s->receiver_node->task.error < 0)
 612                         continue;
 613                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 614                 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
 615                         continue;
 616                 newest_rstime = rstime;
 617                 newest_slot = i;
 618         }
 619         if (newest_slot == -1)
 620                 return NULL;
 621         return slot[newest_slot].receiver_node->btrn;
 622 }
 623
 624 /* whether a new instance of a decoder should be started. */
 625 static bool must_start_decoder(void)
 626 {
 627         int cafn = stat_task->current_audio_format_num;
 628         unsigned vs = stat_task->vss_status;
 629
 630         if (audiod_status != AUDIOD_ON)
 631                 return false;
 632         if (cafn < 0)
 633                 return false;
 634         if (!stat_task->ct)
 635                 return false;
 636         if (vs & VSS_STATUS_FLAG_NEXT)
 637                 return false;
 638         if (!(vs & VSS_STATUS_FLAG_PLAYING))
 639                 return false;
 640         if (receiver_running())
 641                 return false;
 642         if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
 643                 return false;
 644         return true;
 645 }
 646
 647 static unsigned compute_time_diff(const struct timeval *status_time)
 648 {
 649         struct timeval tmp, diff;
 650         static unsigned count;
 651         int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
 652         const struct timeval max_deviation = {0, 500 * 1000};
 653         const int time_smooth = 5;
 654
 655         if (!status_time)
 656                 return count;
 657         sign = tv_diff(status_time, now, &diff);
 658 //              PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
 659 //                      sign, sa_time_diff_sign);
 660         if (!count) {
 661                 sa_time_diff_sign = sign;
 662                 stat_task->sa_time_diff = diff;
 663                 count++;
 664                 goto out;
 665         }
 666         if (count > 5) {
 667                 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
 668                 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
 669                         PARA_WARNING_LOG("time diff jump: %lims\n",
 670                                 s * tv2ms(&tmp));
 671         }
 672         count++;
 673         sa_time_diff_sign = tv_convex_combination(
 674                 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
 675                 count > 10? sign : sign * time_smooth, &diff,
 676                 &tmp);
 677         stat_task->sa_time_diff = tmp;
 678         PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
 679                 sign < 0? "-" : "+",
 680                 tv2ms(&diff),
 681                 sa_time_diff_sign < 0? "-" : "+",
 682                 tv2ms(&stat_task->sa_time_diff)
 683         );
 684 out:
 685         stat_task->sa_time_diff_sign = sa_time_diff_sign;
 686         return count;
 687 }
 688
 689 static int update_item(int itemnum, char *buf)
 690 {
 691         long unsigned sec, usec;
 692
 693         if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
 694                 return 1;
 695         free(stat_item_values[itemnum]);
 696         stat_item_values[itemnum] = para_strdup(buf);
 697         stat_client_write_item(itemnum);
 698         switch (itemnum) {
 699         case SI_STATUS_FLAGS:
 700                 stat_task->vss_status = 0;
 701                 if (strchr(buf, 'N'))
 702                         stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
 703                 if (strchr(buf, 'P'))
 704                         stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
 705                 break;
 706         case SI_OFFSET:
 707                 stat_task->offset_seconds = atoi(buf);
 708                 break;
 709         case SI_SECONDS_TOTAL:
 710                 stat_task->length_seconds = atoi(buf);
 711                 break;
 712         case SI_STREAM_START:
 713                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 714                         stat_task->server_stream_start.tv_sec = sec;
 715                         stat_task->server_stream_start.tv_usec = usec;
 716                 }
 717                 break;
 718         case SI_CURRENT_TIME:
 719                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 720                         struct timeval tv = {sec, usec};
 721                         compute_time_diff(&tv);
 722                 }
 723                 break;
 724         case SI_FORMAT:
 725                 stat_task->current_audio_format_num
 726                         = get_audio_format_num(buf);
 727         }
 728         return 1;
 729 }
 730
 731 static int parse_stream_command(const char *txt, char **cmd)
 732 {
 733         int ret, len;
 734         char *re, *p = strchr(txt, ':');
 735
 736         if (!p)
 737                 return -E_MISSING_COLON;
 738         *cmd = p + 1;
 739         len = p - txt;
 740         re = malloc(len + 1);
 741         strncpy(re, txt, len);
 742         re[len] = '\0';
 743         ret = get_matching_audio_format_nums(re);
 744         free(re);
 745         return ret;
 746 }
 747
 748 static int add_filter(int format, char *cmdline)
 749 {
 750         struct audio_format_info *a = &afi[format];
 751         int filter_num, nf = a->num_filters;
 752         void *cfg;
 753
 754         filter_num = check_filter_arg(cmdline, &cfg);
 755         if (filter_num < 0)
 756                 return filter_num;
 757         a->filter_conf = para_realloc(a->filter_conf,
 758                 (nf + 1) * sizeof(void *));
 759         a->filter_nums = para_realloc(a->filter_nums,
 760                 (nf + 1) * sizeof(unsigned));
 761         a->filter_nums[nf] = filter_num;
 762         a->filter_conf[nf] = cfg;
 763         a->num_filters++;
 764         PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
 765                 filters[filter_num].name);
 766         return filter_num;
 767 }
 768
 769 static int parse_writer_args(void)
 770 {
 771         int i, ret;
 772         char *cmd;
 773         struct audio_format_info *a;
 774
 775         for (i = 0; i < conf.writer_given; i++) {
 776                 void *wconf;
 777                 int j, nw, writer_num, af_mask;
 778
 779                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 780                 if (ret < 0)
 781                         return ret;
 782                 af_mask = ret;
 783                 FOR_EACH_AUDIO_FORMAT(j) {
 784                         a = afi + j;
 785                         if ((af_mask & (1 << j)) == 0) /* no match */
 786                                 continue;
 787                         wconf = check_writer_arg_or_die(cmd, &writer_num);
 788                         nw = a->num_writers;
 789                         a->writer_nums = para_realloc(a->writer_nums, (nw + 1) * sizeof(int));
 790                         a->writer_conf = para_realloc(a->writer_conf, (nw + 1) * sizeof(void *));
 791                         a->writer_nums[nw] = writer_num;
 792                         a->writer_conf[nw] = wconf;
 793                         PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[j],
 794                                 nw, writer_names[writer_num]);
 795                         a->num_writers++;
 796                 }
 797         }
 798         /* Use default writer for audio formats which are not yet set up. */
 799         FOR_EACH_AUDIO_FORMAT(i) {
 800                 struct writer *w = writers + DEFAULT_WRITER;
 801                 a = afi + i;
 802                 if (a->num_writers > 0)
 803                         continue; /* already set up */
 804                 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats[i],
 805                         writer_names[DEFAULT_WRITER]);
 806                 a->writer_nums = para_malloc(sizeof(int));
 807                 a->writer_nums[0] = DEFAULT_WRITER;
 808                 a->writer_conf = para_malloc(sizeof(void *));
 809                 a->writer_conf[0] = w->parse_config_or_die("");
 810                 a->num_writers = 1;
 811         }
 812         return 1;
 813 }
 814
 815 static int parse_receiver_args(void)
 816 {
 817         int i, ret, receiver_num;
 818         char *cmd = NULL;
 819         struct audio_format_info *a;
 820
 821         for (i = conf.receiver_given - 1; i >= 0; i--) {
 822                 char *arg;
 823                 int j, af_mask;
 824
 825                 ret = parse_stream_command(conf.receiver_arg[i], &arg);
 826                 if (ret < 0)
 827                         goto out;
 828                 af_mask = ret;
 829                 FOR_EACH_AUDIO_FORMAT(j) {
 830                         a = afi + j;
 831                         if ((af_mask & (1 << j)) == 0) /* no match */
 832                                 continue;
 833                         /*
 834                          * If multiple receivers are given for this audio format, the
 835                          * last one wins and we have to free the previous receiver
 836                          * config here. Since we are iterating backwards, the winning
 837                          * receiver arg is in fact the first one given.
 838                          */
 839                         if (a->receiver_conf)
 840                                 a->receiver->free_config(a->receiver_conf);
 841                         a->receiver_conf = check_receiver_arg(arg, &receiver_num);
 842                         ret = -E_RECV_SYNTAX;
 843                         if (!a->receiver_conf)
 844                                 goto out;
 845                         a->receiver = receivers + receiver_num;
 846                 }
 847         }
 848         /*
 849          * Use the first available receiver with no arguments for those audio
 850          * formats for which no receiver was specified.
 851          */
 852         cmd = para_strdup(receivers[0].name);
 853         FOR_EACH_AUDIO_FORMAT(i) {
 854                 a = &afi[i];
 855                 if (a->receiver_conf)
 856                         continue;
 857                 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
 858                 if (!a->receiver_conf)
 859                         return -E_RECV_SYNTAX;
 860                 a->receiver = &receivers[receiver_num];
 861         }
 862         FOR_EACH_AUDIO_FORMAT(i) {
 863                 a = afi + i;
 864                 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
 865                         audio_formats[i], a->receiver->name);
 866         }
 867         ret = 1;
 868 out:
 869         free(cmd);
 870         return ret;
 871 }
 872
 873 static int init_default_filters(void)
 874 {
 875         int i, ret = 1;
 876
 877         FOR_EACH_AUDIO_FORMAT(i) {
 878                 struct audio_format_info *a = &afi[i];
 879                 char *tmp;
 880                 int j;
 881
 882                 if (a->num_filters)
 883                         continue; /* no default -- nothing to to */
 884                 /*
 885                  * udp and dccp streams are fec-encoded, so add fecdec as the
 886                  * first filter.
 887                  */
 888                 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
 889                                 strcmp(afi[i].receiver->name, "dccp") == 0) {
 890                         tmp = para_strdup("fecdec");
 891                         add_filter(i, tmp);
 892                         free(tmp);
 893                         if (ret < 0)
 894                                 goto out;
 895                 }
 896                 /* add "dec" to audio format name */
 897                 tmp = make_message("%sdec", audio_formats[i]);
 898                 for (j = 0; filters[j].name; j++)
 899                         if (!strcmp(tmp, filters[j].name))
 900                                 break;
 901                 free(tmp);
 902                 ret = -E_UNSUPPORTED_FILTER;
 903                 if (!filters[j].name)
 904                         goto out;
 905                 tmp = para_strdup(filters[j].name);
 906                 ret = add_filter(i, tmp);
 907                 free(tmp);
 908                 if (ret < 0)
 909                         goto out;
 910                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 911                         filters[j].name);
 912         }
 913 out:
 914         return ret;
 915 }
 916
 917 static int parse_filter_args(void)
 918 {
 919         int i, j, ret, af_mask;
 920
 921         if (conf.no_default_filters_given) {
 922                 PARA_WARNING_LOG("--no_default_filters is deprecated\n");
 923                 PARA_WARNING_LOG("It has no effect and will be removed soon\n");
 924         }
 925         for (i = 0; i < conf.filter_given; i++) {
 926                 char *arg;
 927                 ret = parse_stream_command(conf.filter_arg[i], &arg);
 928                 if (ret < 0)
 929                         goto out;
 930                 af_mask = ret;
 931                 FOR_EACH_AUDIO_FORMAT(j) {
 932                         if ((af_mask & (1 << j)) == 0) /* no match */
 933                                 continue;
 934                         ret = add_filter(j, arg);
 935                         if (ret < 0)
 936                                 goto out;
 937                 }
 938         }
 939         ret = init_default_filters(); /* use default values for the rest */
 940 out:
 941         return ret;
 942 }
 943
 944 static int parse_stream_args(void)
 945 {
 946         int ret;
 947
 948         ret = parse_receiver_args();
 949         if (ret < 0)
 950                 return ret;
 951         ret = parse_filter_args();
 952         if (ret < 0)
 953                 return ret;
 954         ret = parse_writer_args();
 955         if (ret < 0)
 956                 return ret;
 957         return 1;
 958 }
 959
 960 /* does not unlink socket on errors */
 961 static int audiod_get_socket(void)
 962 {
 963         struct sockaddr_un unix_addr;
 964         int ret, fd;
 965
 966         if (conf.socket_given)
 967                 socket_name = para_strdup(conf.socket_arg);
 968         else {
 969                 char *hn = para_hostname();
 970                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 971                         hn);
 972                 free(hn);
 973         }
 974         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 975         if (conf.force_given)
 976                 unlink(socket_name);
 977         ret = create_local_socket(socket_name, &unix_addr,
 978                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 979         if (ret < 0)
 980                 goto err;
 981         fd = ret;
 982         if (listen(fd , 5) < 0) {
 983                 ret = -ERRNO_TO_PARA_ERROR(errno);
 984                 goto err;
 985         }
 986         ret = mark_fd_nonblocking(fd);
 987         if (ret < 0)
 988                 goto err;
 989         return fd;
 990 err:
 991         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 992         exit(EXIT_FAILURE);
 993 }
 994
 995 static void signal_pre_select(struct sched *s, struct task *t)
 996 {
 997         struct signal_task *st = container_of(t, struct signal_task, task);
 998         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 999 }
1000
1001 static void signal_post_select(struct sched *s, __a_unused struct task *t)
1002 {
1003         int signum;
1004
1005         signum = para_next_signal(&s->rfds);
1006         switch (signum) {
1007         case SIGINT:
1008         case SIGTERM:
1009         case SIGHUP:
1010                 PARA_EMERG_LOG("terminating on signal %d\n", signum);
1011                 clean_exit(EXIT_FAILURE, "caught deadly signal");
1012         }
1013 }
1014
1015 static void signal_setup_default(struct signal_task *st)
1016 {
1017         st->task.pre_select = signal_pre_select;
1018         st->task.post_select = signal_post_select;
1019         sprintf(st->task.status, "signal task");
1020 }
1021
1022 static void command_pre_select(struct sched *s, struct task *t)
1023 {
1024         struct command_task *ct = container_of(t, struct command_task, task);
1025         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1026 }
1027
1028 static void command_post_select(struct sched *s, struct task *t)
1029 {
1030         int ret;
1031         struct command_task *ct = container_of(t, struct command_task, task);
1032         static struct timeval last_status_dump;
1033         struct timeval tmp, delay = {0, 500 * 1000};
1034
1035         tv_add(&last_status_dump, &delay, &tmp);
1036         if (tv_diff(&tmp, now, NULL) < 0) {
1037                 audiod_status_dump();
1038                 last_status_dump = *now;
1039         }
1040
1041         ret = handle_connect(ct->fd, &s->rfds);
1042         if (ret < 0)
1043                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1044         audiod_status_dump();
1045 }
1046
1047 static void init_command_task(struct command_task *ct)
1048 {
1049         ct->task.pre_select = command_pre_select;
1050         ct->task.post_select = command_post_select;
1051         ct->task.error = 0;
1052         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1053         sprintf(ct->task.status, "command task");
1054 }
1055
1056 static void close_stat_pipe(void)
1057 {
1058         if (!stat_task->ct)
1059                 return;
1060         client_close(stat_task->ct);
1061         stat_task->ct = NULL;
1062         clear_and_dump_items();
1063         stat_task->length_seconds = 0;
1064         stat_task->offset_seconds = 0;
1065         stat_task->vss_status = 0;
1066         stat_task->current_audio_format_num = -1;
1067         audiod_status_dump();
1068 }
1069
1070 /**
1071  * close the connection to para_server and exit
1072  *
1073  * \param status the exit status which is passed to exit(3)
1074  * \param msg the log message
1075  *
1076  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1077  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1078  * EXIT_FAILURE.
1079  *
1080  * \sa exit(3)
1081  */
1082 void __noreturn clean_exit(int status, const char *msg)
1083 {
1084         PARA_EMERG_LOG("%s\n", msg);
1085         if (socket_name)
1086                 unlink(socket_name);
1087         close_stat_pipe();
1088         exit(status);
1089 }
1090
1091 /* avoid busy loop if server is down */
1092 static void set_stat_task_restart_barrier(unsigned seconds)
1093 {
1094         struct timeval delay = {seconds, 0};
1095         tv_add(now, &delay, &stat_task->restart_barrier);
1096 }
1097
1098 static void try_to_close_slot(int slot_num)
1099 {
1100         struct slot_info *s = &slot[slot_num];
1101         struct audio_format_info *a = afi + s->format;
1102         int i;
1103
1104         if (s->format < 0)
1105                 return;
1106         if (s->receiver_node && s->receiver_node->task.error >= 0)
1107                 return;
1108         for (i = 0; i < a->num_filters; i++)
1109                 if (s->fns && s->fns[i].task.error >= 0)
1110                         return;
1111         if (a->num_writers > 0) {
1112                 for (i = 0; i < a->num_writers; i++)
1113                         if (s->wns && s->wns[i].task.error >= 0)
1114                                 return;
1115         } else {
1116                 if (s->wns && s->wns[0].task.error >= 0)
1117                         return;
1118         }
1119         PARA_INFO_LOG("closing slot %d\n", slot_num);
1120         close_writers(s);
1121         close_filters(s);
1122         close_receiver(slot_num);
1123         clear_slot(slot_num);
1124 }
1125
1126 /*
1127  * Check if any receivers/filters/writers need to be started and do so if
1128  * necessary.
1129  */
1130 static void start_stop_decoders(void)
1131 {
1132         int i, ret;
1133         struct slot_info *sl;
1134         struct audio_format_info *a;
1135
1136         FOR_EACH_SLOT(i)
1137                 try_to_close_slot(i);
1138         if (audiod_status != AUDIOD_ON ||
1139                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1140                 return kill_all_decoders(-E_NOT_PLAYING);
1141         if (!must_start_decoder())
1142                 return;
1143         ret = open_receiver(stat_task->current_audio_format_num);
1144         if (ret < 0) {
1145                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1146                 return;
1147         }
1148         sl = slot + ret;
1149         a = afi + sl->format;
1150         if (a->num_filters)
1151                 open_filters(sl);
1152         open_writers(sl);
1153         activate_grab_clients(&sched);
1154         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1155 }
1156
1157 static void status_pre_select(struct sched *s, struct task *t)
1158 {
1159         struct status_task *st = container_of(t, struct status_task, task);
1160         int ret, cafn = stat_task->current_audio_format_num;
1161
1162         if (must_start_decoder())
1163                 goto min_delay;
1164         ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1165         if (ret > 0)
1166                 goto min_delay;
1167         if (st->ct && audiod_status == AUDIOD_OFF)
1168                 goto min_delay;
1169         if (!st->ct && audiod_status != AUDIOD_OFF)
1170                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1171         if (cafn >= 0)
1172                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1173         /*
1174          * If para_server is playing we'd like to have a smooth time display
1175          * even if we are running in standby mode. So we request a timeout that
1176          * expires at the next full second.
1177          */
1178         if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1179                 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1180         return;
1181 min_delay:
1182         sched_min_delay(s);
1183 }
1184
1185 /* restart the client task if necessary */
1186 static void status_post_select(struct sched *s, struct task *t)
1187 {
1188         struct status_task *st = container_of(t, struct status_task, task);
1189
1190         if (audiod_status == AUDIOD_OFF) {
1191                 if (!st->ct)
1192                         goto out;
1193                 if (st->ct->task.error >= 0) {
1194                         kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
1195                         goto out;
1196                 }
1197                 if (st->ct->task.error >= 0)
1198                         goto out;
1199                 close_stat_pipe();
1200                 st->clock_diff_count = conf.clock_diff_count_arg;
1201                 goto out;
1202         }
1203         if (st->ct) {
1204                 char *buf;
1205                 size_t sz;
1206                 int ret;
1207                 if (st->ct->task.error < 0) {
1208                         if (st->ct->task.error >= 0)
1209                                 goto out;
1210                         close_stat_pipe();
1211                         goto out;
1212                 }
1213                 if (st->ct->status != CL_RECEIVING)
1214                         goto out;
1215                 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1216                 if (ret <= 0) {
1217                         struct timeval diff;
1218                         tv_diff(now, &st->last_status_read, &diff);
1219                         if (diff.tv_sec > 61)
1220                                 kill_btrn(st->ct->btrn, &st->ct->task,
1221                                         -E_STATUS_TIMEOUT);
1222                         goto out;
1223                 }
1224                 btr_merge(st->btrn, st->min_iqs);
1225                 sz = btr_next_buffer(st->btrn, &buf);
1226                 ret = for_each_stat_item(buf, sz, update_item);
1227                 if (ret < 0) {
1228                         kill_btrn(st->ct->btrn, &st->ct->task, ret);
1229                         goto out;
1230                 }
1231                 if (sz != ret) {
1232                         btr_consume(st->btrn, sz - ret);
1233                         st->last_status_read = *now;
1234                         st->min_iqs = 0;
1235                 } else /* current status item crosses buffers */
1236                         st->min_iqs = sz + 1;
1237                 goto out;
1238         }
1239         btr_drain(st->btrn);
1240         st->current_audio_format_num = -1;
1241         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1242                 goto out;
1243         if (st->clock_diff_count) { /* get status only one time */
1244                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1245                 int argc = 5;
1246                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1247                 st->clock_diff_count--;
1248                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1249                 set_stat_task_restart_barrier(2);
1250
1251         } else {
1252                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1253                 int argc = 4;
1254                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1255                 set_stat_task_restart_barrier(5);
1256         }
1257         free(stat_item_values[SI_BASENAME]);
1258         stat_item_values[SI_BASENAME] = para_strdup(
1259                 "no connection to para_server");
1260         stat_client_write_item(SI_BASENAME);
1261         st->last_status_read = *now;
1262 out:
1263         start_stop_decoders();
1264 }
1265
1266 static void init_status_task(struct status_task *st)
1267 {
1268         memset(st, 0, sizeof(struct status_task));
1269         st->task.pre_select = status_pre_select;
1270         st->task.post_select = status_post_select;
1271         st->sa_time_diff_sign = 1;
1272         st->clock_diff_count = conf.clock_diff_count_arg;
1273         st->current_audio_format_num = -1;
1274         sprintf(st->task.status, "stat");
1275         st->btrn = btr_new_node(&(struct btr_node_description)
1276                 EMBRACE(.name = "stat"));
1277 }
1278
1279 static void set_initial_status(void)
1280 {
1281         audiod_status = AUDIOD_ON;
1282         if (!conf.mode_given)
1283                 return;
1284         if (!strcmp(conf.mode_arg, "sb")) {
1285                 audiod_status = AUDIOD_STANDBY;
1286                 return;
1287         }
1288         if (!strcmp(conf.mode_arg, "off")) {
1289                 audiod_status = AUDIOD_OFF;
1290                 return;
1291         }
1292         if (strcmp(conf.mode_arg, "on"))
1293                 PARA_WARNING_LOG("invalid mode\n");
1294 }
1295
1296 __noreturn static void print_help_and_die(void)
1297 {
1298         int d = conf.detailed_help_given;
1299         const char **p = d? audiod_args_info_detailed_help
1300                 : audiod_args_info_help;
1301
1302         printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1303                 AUDIOD_CMDLINE_PARSER_VERSION);
1304         printf_or_die("%s\n\n", audiod_args_info_usage);
1305         for (; *p; p++)
1306                 printf_or_die("%s\n", *p);
1307         print_receiver_helps(d);
1308         print_filter_helps(d);
1309         print_writer_helps(d);
1310         exit(0);
1311 }
1312
1313 static void init_colors_or_die(void)
1314 {
1315         int i;
1316
1317         if (!want_colors())
1318                 return;
1319         daemon_set_default_log_colors();
1320         daemon_set_flag(DF_COLOR_LOG);
1321         for (i = 0; i < conf.log_color_given; i++)
1322                 daemon_set_log_color_or_die(conf.log_color_arg[i]);
1323 }
1324
1325 /**
1326  * the main function of para_audiod
1327  *
1328  * \param argc usual argument count
1329  * \param argv usual argument vector
1330  *
1331  * \return EXIT_SUCCESS or EXIT_FAILURE
1332  *
1333  * \sa para_audiod(1)
1334  * */
1335 int main(int argc, char *argv[])
1336 {
1337         int ret, i;
1338         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1339         struct audiod_cmdline_parser_params params = {
1340                 .override = 0,
1341                 .initialize = 1,
1342                 .check_required = 0,
1343                 .check_ambiguity = 0,
1344                 .print_errors = 1
1345         };
1346
1347         valid_fd_012();
1348         if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1349                 exit(EXIT_FAILURE);
1350         HANDLE_VERSION_FLAG("audiod", conf);
1351         /* init receivers/filters/writers early to make help work */
1352         recv_init();
1353         filter_init();
1354         writer_init();
1355         if (conf.help_given || conf.detailed_help_given)
1356                 print_help_and_die();
1357         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1358         parse_config_or_die();
1359         init_colors_or_die();
1360         init_random_seed_or_die();
1361         daemon_set_flag(DF_LOG_TIME);
1362         daemon_set_flag(DF_LOG_HOSTNAME);
1363         daemon_set_flag(DF_LOG_LL);
1364         if (conf.log_timing_given)
1365                 daemon_set_flag(DF_LOG_TIMING);
1366         if (conf.logfile_given) {
1367                 daemon_set_logfile(conf.logfile_arg);
1368                 daemon_open_log_or_die();
1369         }
1370         ret = parse_stream_args();
1371         if (ret < 0) {
1372                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1373                 exit(EXIT_FAILURE);
1374         }
1375         log_welcome("para_audiod");
1376         set_server_start_time(NULL);
1377         set_initial_status();
1378         FOR_EACH_SLOT(i)
1379                 clear_slot(i);
1380         setup_signal_handling();
1381         signal_setup_default(sig_task);
1382
1383         init_status_task(stat_task);
1384         init_command_task(cmd_task);
1385
1386         if (conf.daemon_given)
1387                 daemonize(false /* parent exits immediately */);
1388
1389         register_task(&sched, &sig_task->task);
1390         register_task(&sched, &cmd_task->task);
1391         register_task(&sched, &stat_task->task);
1392         sched.default_timeout.tv_sec = 2;
1393         sched.default_timeout.tv_usec = 999 * 1000;
1394         ret = schedule(&sched);
1395
1396         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1397         return EXIT_FAILURE;
1398 }