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 /**
  81  * The scheduler instance of para_audiod.
  82  *
  83  * This is needed also in audiod_command.c (for the tasks command), so it can
  84  * not be made static.
  85  */
  86 struct sched sched = {.max_fileno = 0};
  87
  88 /**
  89  * The task for obtaining para_server's status (para_client stat).
  90  *
  91  * \sa struct task, struct sched.
  92  */
  93 struct status_task {
  94         /** The associated task structure of audiod. */
  95         struct task task;
  96         /** Client data associated with the stat task. */
  97         struct client_task *ct;
  98         /** Do not restart client command until this time. */
  99         struct timeval restart_barrier;
 100         /** Last time we received status data from para_server. */
 101         struct timeval last_status_read;
 102         size_t min_iqs;
 103         /** The offset value announced by para_server. */
 104         int offset_seconds;
 105         /** The length of the current audio file as announced by para_server. */
 106         int length_seconds;
 107         /** The start of the current stream from the view of para_server. */
 108         struct timeval server_stream_start;
 109         /** The average time deviation between para_server and para_audiod. */
 110         struct timeval sa_time_diff;
 111         /** Whether client time is ahead of server time. */
 112         int sa_time_diff_sign;
 113         /** The 'P' and the 'N' flags as announced by para_server. */
 114         enum vss_status_flags vss_status;
 115         /** Number of times the clock difference is to be checked. */
 116         unsigned clock_diff_count;
 117         /** When to start the next check for clock difference. */
 118         struct timeval clock_diff_barrier;
 119         /** Number of the audio format as announced by para_server. */
 120         int current_audio_format_num;
 121         /* The status task btrn is the child of the client task. */
 122         struct btr_node *btrn;
 123 };
 124
 125 /** The array of status items sent by para_server. */
 126 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 127
 128 /**
 129  * the current mode of operation of which can be changed by the on/off/cycle
 130  * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
 131  */
 132 int audiod_status = AUDIOD_ON;
 133
 134 /**
 135  * the gengetopt args_info struct that holds information on all command line
 136  * arguments
 137  */
 138 struct audiod_args_info conf;
 139
 140 static char *socket_name;
 141 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 142
 143 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
 144
 145 static struct status_task status_task_struct;
 146
 147 /**
 148  * the task that calls the status command of para_server
 149  *
 150  * \sa struct status_task
 151  */
 152 static struct status_task *stat_task = &status_task_struct;
 153
 154 /**
 155  * the task for handling audiod commands
 156  *
 157  * \sa struct task, struct sched
 158  */
 159 struct command_task {
 160         /** the local listening socket */
 161         int fd;
 162         /** the associated task structure */
 163         struct task task;
 164 };
 165
 166 /** iterate over all supported audio formats */
 167 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 168
 169 /**
 170  * Get the audio format number.
 171  *
 172  * \param name The name of the audio format.
 173  *
 174  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
 175  * \a name is not a supported audio format.
 176  */
 177 static int get_audio_format_num(const char *name)
 178 {
 179         int i;
 180
 181         while (para_isspace(*name))
 182                 name++;
 183         FOR_EACH_AUDIO_FORMAT(i)
 184                 if (!strcmp(name, audio_formats[i]))
 185                         return i;
 186         return -E_UNSUPPORTED_AUDIO_FORMAT;
 187 }
 188
 189 static int get_matching_audio_format_nums(const char *re)
 190 {
 191         int i, ret;
 192         regex_t preg;
 193
 194         ret = para_regcomp(&preg, re, REG_EXTENDED | REG_NOSUB);
 195         if (ret < 0)
 196                 return ret;
 197         ret = 0;
 198         FOR_EACH_AUDIO_FORMAT(i)
 199                 if (regexec(&preg, audio_formats[i], 0, NULL, 0) != REG_NOMATCH)
 200                         ret |= (1 << i);
 201         regfree(&preg);
 202         return ret;
 203 }
 204
 205 /**
 206  * Compute the play time based on information of the given slot.
 207  *
 208  * \param slot_num The slot number (negative means: no slot).
 209  *
 210  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 211  * from the status items received from para_server and the start time of the
 212  * (first) writer of the given slot.
 213  *
 214  * It has to to take into account that probably the stream was not started at
 215  * the beginning of the file, that the clock between the server and the client
 216  * host may differ and that playback of the stream was delayed, e.g. because
 217  * the prebuffer filter is used in the filter configuration of the given slot.
 218  *
 219  * If no writer is active in the given slot, or \a slot_num is negative
 220  * (indicating that para_audiod runs in standby mode), an approximation based
 221  * only on the status items is computed and the returned string is prefixed
 222  * with "~".
 223  *
 224  * \return A string that must be freed by the caller.
 225  */
 226 char *get_time_string(int slot_num)
 227 {
 228         int ret, seconds = 0, length;
 229         struct timeval *tmp, sum, sss, /* server stream start */
 230                 rstime, /* receiver start time */
 231                 wstime, /* writer start time */
 232                 wtime, /* now - writer start */
 233                 rskip; /* receiver start - sss */
 234         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 235         char *msg;
 236
 237         if (audiod_status == AUDIOD_OFF)
 238                 goto empty;
 239         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 240                 if (stat_task->length_seconds) /* paused */
 241                         return NULL;
 242                 goto empty; /* stopped */
 243         }
 244         if (audiod_status == AUDIOD_ON && !s)
 245                 goto empty;
 246         /*
 247          * Valid status items and playing, set length and tmp to the stream
 248          * start. We use the slot info and fall back to the info from current
 249          * status items if no slot info is available.
 250          */
 251         length = stat_task->length_seconds;
 252         tmp = &stat_task->server_stream_start;
 253         if (s && s->wns && s->wns[0].btrn) { /* writer active in this slot */
 254                 btr_get_node_start(s->wns[0].btrn, &wstime);
 255                 if (wstime.tv_sec != 0) { /* writer wrote something */
 256                         if (s->server_stream_start.tv_sec == 0) {
 257                                 /* copy status info to slot */
 258                                 s->server_stream_start = stat_task->server_stream_start;
 259                                 s->offset_seconds = stat_task->offset_seconds;
 260                                 s->seconds_total = stat_task->length_seconds;
 261                         }
 262                         length = s->seconds_total;
 263                         tmp = &s->server_stream_start;
 264                 }
 265         }
 266         if (stat_task->sa_time_diff_sign > 0)
 267                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 268         else
 269                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 270         if (!s || !s->wns || !s->wns[0].btrn) {
 271                 struct timeval diff;
 272                 tv_diff(now, &sss, &diff);
 273                 seconds = diff.tv_sec + stat_task->offset_seconds;
 274                 goto out;
 275         }
 276         tv_diff(now, &wstime, &wtime);
 277         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 278         seconds = s->offset_seconds;
 279         if (s->receiver_node->btrn) {
 280                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 281                 ret = tv_diff(&rstime, &sss, &rskip);
 282                 if (ret > 0) { /* audiod was started in the middle of the stream */
 283                         tv_add(&wtime, &rskip, &sum);
 284                         seconds += sum.tv_sec;
 285                 } else
 286                         seconds += wtime.tv_sec;
 287         } else
 288                 seconds += wtime.tv_sec;
 289 out:
 290         seconds = PARA_MIN(seconds, length);
 291         seconds = PARA_MAX(seconds, 0);
 292         msg = make_message(
 293                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 294                 s? "" : "~",
 295                 seconds / 60,
 296                 seconds % 60,
 297                 (length - seconds) / 60,
 298                 (length - seconds) % 60,
 299                 length? (seconds * 100 + length / 2) / length : 0,
 300                 length / 60,
 301                 length % 60
 302         );
 303         //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 304         return msg;
 305 empty:
 306         return para_strdup(NULL);
 307 }
 308
 309 static int want_colors(void)
 310 {
 311         if (conf.color_arg == color_arg_no)
 312                 return 0;
 313         if (conf.color_arg == color_arg_yes)
 314                 return 1;
 315         if (conf.logfile_given)
 316                 return 0;
 317         return isatty(STDERR_FILENO);
 318 }
 319
 320 static void parse_config_or_die(void)
 321 {
 322         int ret;
 323         char *config_file;
 324         struct audiod_cmdline_parser_params params = {
 325                 .override = 0,
 326                 .initialize = 0,
 327                 .check_required = 1,
 328                 .check_ambiguity = 0,
 329                 .print_errors = 1
 330         };
 331
 332         if (conf.config_file_given)
 333                 config_file = para_strdup(conf.config_file_arg);
 334         else {
 335                 char *home = para_homedir();
 336                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 337                 free(home);
 338         }
 339         ret = file_exists(config_file);
 340         if (conf.config_file_given && !ret) {
 341                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 342                 goto err;
 343         }
 344         if (ret)
 345                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 346         free(config_file);
 347         daemon_set_loglevel(conf.loglevel_arg);
 348         return;
 349 err:
 350         free(config_file);
 351         exit(EXIT_FAILURE);
 352 }
 353
 354 static void setup_signal_handling(void)
 355 {
 356         sig_task->fd = para_signal_init();
 357         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 358         para_install_sighandler(SIGINT);
 359         para_install_sighandler(SIGTERM);
 360         para_install_sighandler(SIGHUP);
 361         para_sigaction(SIGPIPE, SIG_IGN);
 362 }
 363
 364 static void clear_slot(int slot_num)
 365 {
 366         struct slot_info *s = &slot[slot_num];
 367
 368         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 369         memset(s, 0, sizeof(struct slot_info));
 370         s->format = -1;
 371 }
 372
 373 static void close_receiver(int slot_num)
 374 {
 375         struct slot_info *s = &slot[slot_num];
 376         struct audio_format_info *a;
 377
 378         if (s->format < 0 || !s->receiver_node)
 379                 return;
 380         a = &afi[s->format];
 381         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 382                 audio_formats[s->format], slot_num);
 383         a->receiver->close(s->receiver_node);
 384         btr_remove_node(&s->receiver_node->btrn);
 385         free(s->receiver_node);
 386         s->receiver_node = NULL;
 387         tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
 388                 &a->restart_barrier);
 389 }
 390
 391 static void writer_cleanup(struct writer_node *wn)
 392 {
 393         struct writer *w;
 394
 395         if (!wn)
 396                 return;
 397         w = writers + wn->writer_num;
 398         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 399         w->close(wn);
 400         btr_remove_node(&wn->btrn);
 401 }
 402
 403 static void close_writers(struct slot_info *s)
 404 {
 405         struct audio_format_info *a;
 406         int i;
 407
 408         if (s->format < 0)
 409                 return;
 410         assert(s->wns);
 411         a = afi + s->format;
 412         if (a->num_writers == 0)
 413                 writer_cleanup(s->wns);
 414         else {
 415                 for (i = 0; i < a->num_writers; i++)
 416                         writer_cleanup(s->wns + i);
 417         }
 418         free(s->wns);
 419         s->wns = NULL;
 420 }
 421
 422 static void close_filters(struct slot_info *s)
 423 {
 424         int i;
 425         struct audio_format_info *a = afi + s->format;
 426         if (a->num_filters == 0)
 427                 return;
 428         for (i = 0; i < a->num_filters; i++) {
 429                 struct filter_node *fn = s->fns + i;
 430                 struct filter *f;
 431
 432                 if (!fn)
 433                         continue;
 434                 f = filters + fn->filter_num;
 435                 if (f->close)
 436                         f->close(fn);
 437                 btr_remove_node(&fn->btrn);
 438         }
 439         free(s->fns);
 440         s->fns = NULL;
 441 }
 442
 443 /*
 444  * Whenever a task commits suicide by returning from post_select with t->error
 445  * < 0, it also removes its btr node. We do exactly that to kill a running
 446  * task. Note that the scheduler checks t->error also _before_ each pre/post
 447  * select call, so the victim will never be scheduled again.
 448  */
 449 static void kill_btrn(struct btr_node **btrnp, struct task *t, int error)
 450 {
 451         if (t->error < 0)
 452                 return;
 453         t->error = error;
 454         btr_remove_node(btrnp);
 455 }
 456
 457 static void notify_receivers(int error)
 458 {
 459         int i;
 460
 461         FOR_EACH_SLOT(i) {
 462                 struct slot_info *s = slot + i;
 463                 if (s->format < 0)
 464                         continue;
 465                 if (!s->receiver_node)
 466                         continue;
 467                 task_notify(&s->receiver_node->task, error);
 468         }
 469 }
 470
 471 static int get_empty_slot(void)
 472 {
 473         int i;
 474         struct slot_info *s;
 475
 476         FOR_EACH_SLOT(i) {
 477                 s = &slot[i];
 478                 if (s->format < 0) {
 479                         clear_slot(i);
 480                         return i;
 481                 }
 482                 if (s->wns || s->receiver_node || s->fns)
 483                         continue;
 484                 clear_slot(i);
 485                 return i;
 486         }
 487         return -E_NO_MORE_SLOTS;
 488 }
 489
 490 static void open_filters(struct slot_info *s)
 491 {
 492         struct audio_format_info *a = afi + s->format;
 493         struct filter_node *fn;
 494         int nf = a->num_filters;
 495         struct btr_node *parent;
 496         int i;
 497
 498         if (nf == 0)
 499                 return;
 500         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 501         assert(s->fns == NULL);
 502         s->fns = para_calloc(nf * sizeof(struct filter_node));
 503         parent = s->receiver_node->btrn;
 504         for (i = 0; i < nf; i++) {
 505                 struct filter *f = filters + a->filter_nums[i];
 506                 fn = s->fns + i;
 507                 fn->filter_num = a->filter_nums[i];
 508                 fn->conf = a->filter_conf[i];
 509                 fn->task.pre_select = f->pre_select;
 510                 fn->task.post_select = f->post_select;
 511
 512                 fn->btrn = btr_new_node(&(struct btr_node_description)
 513                         EMBRACE(.name = f->name, .parent = parent,
 514                                 .handler = f->execute, .context = fn));
 515
 516                 f->open(fn);
 517                 register_task(&sched, &fn->task);
 518                 parent = fn->btrn;
 519                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 520                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 521                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 522         }
 523 }
 524
 525 static void open_writers(struct slot_info *s)
 526 {
 527         int i;
 528         struct audio_format_info *a = afi + s->format;
 529         struct writer_node *wn;
 530         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 531
 532         assert(s->wns == NULL);
 533         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 534                 * sizeof(struct writer_node));
 535         PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 536         for (i = 0; i < a->num_writers; i++) {
 537                 wn = s->wns + i;
 538                 wn->conf = a->writer_conf[i];
 539                 wn->writer_num = a->writer_nums[i];
 540                 register_writer_node(wn, parent, &sched);
 541         }
 542 }
 543
 544 /* returns slot num on success */
 545 static int open_receiver(int format)
 546 {
 547         struct audio_format_info *a = &afi[format];
 548         struct slot_info *s;
 549         int ret, slot_num;
 550         struct receiver *r = a->receiver;
 551         struct receiver_node *rn;
 552
 553         tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
 554         ret = get_empty_slot();
 555         if (ret < 0)
 556                 return ret;
 557         slot_num = ret;
 558         rn = para_calloc(sizeof(*rn));
 559         rn->receiver = r;
 560         rn->conf = a->receiver_conf;
 561         rn->btrn = btr_new_node(&(struct btr_node_description)
 562                 EMBRACE(.name = r->name, .context = rn));
 563         ret = r->open(rn);
 564         if (ret < 0) {
 565                 btr_remove_node(&rn->btrn);
 566                 free(rn);
 567                 return ret;
 568         }
 569         s = &slot[slot_num];
 570         s->format = format;
 571         s->receiver_node = rn;
 572         PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
 573                 audio_formats[format], r->name, slot_num);
 574         rn->task.pre_select = r->pre_select;
 575         rn->task.post_select = r->post_select;
 576         sprintf(rn->task.status, "%s receiver node", r->name);
 577         register_task(&sched, &rn->task);
 578         return slot_num;
 579 }
 580
 581 static bool receiver_running(void)
 582 {
 583         int i;
 584         long unsigned ss1 = stat_task->server_stream_start.tv_sec;
 585
 586         FOR_EACH_SLOT(i) {
 587                 struct slot_info *s = &slot[i];
 588                 long unsigned ss2 = s->server_stream_start.tv_sec;
 589
 590                 if (!s->receiver_node)
 591                         continue;
 592                 if (s->receiver_node->task.error >= 0)
 593                         return true;
 594                 if (ss1 == ss2)
 595                         return true;
 596         }
 597         return false;
 598 }
 599
 600 /**
 601  * Return the root node of the current buffer tree.
 602  *
 603  * This is only used for stream grabbing.
 604  *
 605  * \return \p NULL if no slot is currently active. If more than one buffer tree
 606  * exists, the node corresponding to the most recently started receiver is
 607  * returned.
 608  */
 609 struct btr_node *audiod_get_btr_root(void)
 610 {
 611         int i, newest_slot = -1;
 612         struct timeval newest_rstime = {0, 0};
 613
 614         FOR_EACH_SLOT(i) {
 615                 struct slot_info *s = &slot[i];
 616                 struct timeval rstime;
 617                 if (!s->receiver_node)
 618                         continue;
 619                 if (s->receiver_node->task.error < 0)
 620                         continue;
 621                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 622                 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
 623                         continue;
 624                 newest_rstime = rstime;
 625                 newest_slot = i;
 626         }
 627         if (newest_slot == -1)
 628                 return NULL;
 629         return slot[newest_slot].receiver_node->btrn;
 630 }
 631
 632 /* whether a new instance of a decoder should be started. */
 633 static bool must_start_decoder(void)
 634 {
 635         int cafn = stat_task->current_audio_format_num;
 636         unsigned vs = stat_task->vss_status;
 637
 638         if (audiod_status != AUDIOD_ON)
 639                 return false;
 640         if (cafn < 0)
 641                 return false;
 642         if (!stat_task->ct)
 643                 return false;
 644         if (vs & VSS_STATUS_FLAG_NEXT)
 645                 return false;
 646         if (!(vs & VSS_STATUS_FLAG_PLAYING))
 647                 return false;
 648         if (receiver_running())
 649                 return false;
 650         if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
 651                 return false;
 652         return true;
 653 }
 654
 655 static unsigned compute_time_diff(const struct timeval *status_time)
 656 {
 657         struct timeval tmp, diff;
 658         static unsigned count;
 659         int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
 660         const struct timeval max_deviation = {0, 500 * 1000};
 661         const int time_smooth = 5;
 662
 663         if (!status_time)
 664                 return count;
 665         sign = tv_diff(status_time, now, &diff);
 666 //              PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
 667 //                      sign, sa_time_diff_sign);
 668         if (!count) {
 669                 sa_time_diff_sign = sign;
 670                 stat_task->sa_time_diff = diff;
 671                 count++;
 672                 goto out;
 673         }
 674         if (count > 5) {
 675                 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
 676                 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
 677                         PARA_WARNING_LOG("time diff jump: %lims\n",
 678                                 s * tv2ms(&tmp));
 679         }
 680         count++;
 681         sa_time_diff_sign = tv_convex_combination(
 682                 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
 683                 count > 10? sign : sign * time_smooth, &diff,
 684                 &tmp);
 685         stat_task->sa_time_diff = tmp;
 686         PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
 687                 sign < 0? "-" : "+",
 688                 tv2ms(&diff),
 689                 sa_time_diff_sign < 0? "-" : "+",
 690                 tv2ms(&stat_task->sa_time_diff)
 691         );
 692 out:
 693         stat_task->sa_time_diff_sign = sa_time_diff_sign;
 694         return count;
 695 }
 696
 697 static int update_item(int itemnum, char *buf)
 698 {
 699         long unsigned sec, usec;
 700
 701         if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
 702                 return 1;
 703         free(stat_item_values[itemnum]);
 704         stat_item_values[itemnum] = para_strdup(buf);
 705         stat_client_write_item(itemnum);
 706         switch (itemnum) {
 707         case SI_STATUS_FLAGS:
 708                 stat_task->vss_status = 0;
 709                 if (strchr(buf, 'N'))
 710                         stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
 711                 if (strchr(buf, 'P'))
 712                         stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
 713                 break;
 714         case SI_OFFSET:
 715                 stat_task->offset_seconds = atoi(buf);
 716                 break;
 717         case SI_SECONDS_TOTAL:
 718                 stat_task->length_seconds = atoi(buf);
 719                 break;
 720         case SI_STREAM_START:
 721                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 722                         stat_task->server_stream_start.tv_sec = sec;
 723                         stat_task->server_stream_start.tv_usec = usec;
 724                 }
 725                 break;
 726         case SI_CURRENT_TIME:
 727                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 728                         struct timeval tv = {sec, usec};
 729                         compute_time_diff(&tv);
 730                 }
 731                 break;
 732         case SI_FORMAT:
 733                 stat_task->current_audio_format_num
 734                         = get_audio_format_num(buf);
 735         }
 736         return 1;
 737 }
 738
 739 static int parse_stream_command(const char *txt, char **cmd)
 740 {
 741         int ret, len;
 742         char *re, *p = strchr(txt, ':');
 743
 744         if (!p)
 745                 return -E_MISSING_COLON;
 746         *cmd = p + 1;
 747         len = p - txt;
 748         re = malloc(len + 1);
 749         strncpy(re, txt, len);
 750         re[len] = '\0';
 751         ret = get_matching_audio_format_nums(re);
 752         free(re);
 753         return ret;
 754 }
 755
 756 static int add_filter(int format, char *cmdline)
 757 {
 758         struct audio_format_info *a = &afi[format];
 759         int filter_num, nf = a->num_filters;
 760         void *cfg;
 761
 762         filter_num = check_filter_arg(cmdline, &cfg);
 763         if (filter_num < 0)
 764                 return filter_num;
 765         a->filter_conf = para_realloc(a->filter_conf,
 766                 (nf + 1) * sizeof(void *));
 767         a->filter_nums = para_realloc(a->filter_nums,
 768                 (nf + 1) * sizeof(unsigned));
 769         a->filter_nums[nf] = filter_num;
 770         a->filter_conf[nf] = cfg;
 771         a->num_filters++;
 772         PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
 773                 filters[filter_num].name);
 774         return filter_num;
 775 }
 776
 777 static int parse_writer_args(void)
 778 {
 779         int i, ret;
 780         char *cmd;
 781         struct audio_format_info *a;
 782
 783         for (i = 0; i < conf.writer_given; i++) {
 784                 void *wconf;
 785                 int j, nw, writer_num, af_mask;
 786
 787                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 788                 if (ret < 0)
 789                         return ret;
 790                 af_mask = ret;
 791                 FOR_EACH_AUDIO_FORMAT(j) {
 792                         a = afi + j;
 793                         if ((af_mask & (1 << j)) == 0) /* no match */
 794                                 continue;
 795                         wconf = check_writer_arg_or_die(cmd, &writer_num);
 796                         nw = a->num_writers;
 797                         a->writer_nums = para_realloc(a->writer_nums, (nw + 1) * sizeof(int));
 798                         a->writer_conf = para_realloc(a->writer_conf, (nw + 1) * sizeof(void *));
 799                         a->writer_nums[nw] = writer_num;
 800                         a->writer_conf[nw] = wconf;
 801                         PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[j],
 802                                 nw, writer_names[writer_num]);
 803                         a->num_writers++;
 804                 }
 805         }
 806         /* Use default writer for audio formats which are not yet set up. */
 807         FOR_EACH_AUDIO_FORMAT(i) {
 808                 void *writer_conf;
 809                 int writer_num;
 810                 a = afi + i;
 811                 if (a->num_writers > 0)
 812                         continue; /* already set up */
 813                 writer_conf = check_writer_arg_or_die(NULL, &writer_num);
 814                 a->writer_nums = para_malloc(sizeof(int));
 815                 a->writer_nums[0] = writer_num;
 816                 a->writer_conf = para_malloc(sizeof(void *));
 817                 a->writer_conf[0] = writer_conf;
 818                 a->num_writers = 1;
 819                 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats[i],
 820                         writer_names[writer_num]);
 821         }
 822         return 1;
 823 }
 824
 825 static int parse_receiver_args(void)
 826 {
 827         int i, ret, receiver_num;
 828         char *cmd = NULL;
 829         struct audio_format_info *a;
 830
 831         for (i = conf.receiver_given - 1; i >= 0; i--) {
 832                 char *arg;
 833                 int j, af_mask;
 834
 835                 ret = parse_stream_command(conf.receiver_arg[i], &arg);
 836                 if (ret < 0)
 837                         goto out;
 838                 af_mask = ret;
 839                 FOR_EACH_AUDIO_FORMAT(j) {
 840                         a = afi + j;
 841                         if ((af_mask & (1 << j)) == 0) /* no match */
 842                                 continue;
 843                         /*
 844                          * If multiple receivers are given for this audio format, the
 845                          * last one wins and we have to free the previous receiver
 846                          * config here. Since we are iterating backwards, the winning
 847                          * receiver arg is in fact the first one given.
 848                          */
 849                         if (a->receiver_conf)
 850                                 a->receiver->free_config(a->receiver_conf);
 851                         a->receiver_conf = check_receiver_arg(arg, &receiver_num);
 852                         ret = -E_RECV_SYNTAX;
 853                         if (!a->receiver_conf)
 854                                 goto out;
 855                         a->receiver = receivers + receiver_num;
 856                 }
 857         }
 858         /*
 859          * Use the first available receiver with no arguments for those audio
 860          * formats for which no receiver was specified.
 861          */
 862         cmd = para_strdup(receivers[0].name);
 863         FOR_EACH_AUDIO_FORMAT(i) {
 864                 a = &afi[i];
 865                 if (a->receiver_conf)
 866                         continue;
 867                 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
 868                 if (!a->receiver_conf)
 869                         return -E_RECV_SYNTAX;
 870                 a->receiver = &receivers[receiver_num];
 871         }
 872         FOR_EACH_AUDIO_FORMAT(i) {
 873                 a = afi + i;
 874                 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
 875                         audio_formats[i], a->receiver->name);
 876         }
 877         ret = 1;
 878 out:
 879         free(cmd);
 880         return ret;
 881 }
 882
 883 static int init_default_filters(void)
 884 {
 885         int i, ret = 1;
 886
 887         FOR_EACH_AUDIO_FORMAT(i) {
 888                 struct audio_format_info *a = &afi[i];
 889                 char *tmp;
 890                 int j;
 891
 892                 if (a->num_filters)
 893                         continue; /* no default -- nothing to to */
 894                 /*
 895                  * udp and dccp streams are fec-encoded, so add fecdec as the
 896                  * first filter.
 897                  */
 898                 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
 899                                 strcmp(afi[i].receiver->name, "dccp") == 0) {
 900                         tmp = para_strdup("fecdec");
 901                         add_filter(i, tmp);
 902                         free(tmp);
 903                         if (ret < 0)
 904                                 goto out;
 905                 }
 906                 /* add "dec" to audio format name */
 907                 tmp = make_message("%sdec", audio_formats[i]);
 908                 for (j = 0; filters[j].name; j++)
 909                         if (!strcmp(tmp, filters[j].name))
 910                                 break;
 911                 free(tmp);
 912                 ret = -E_UNSUPPORTED_FILTER;
 913                 if (!filters[j].name)
 914                         goto out;
 915                 tmp = para_strdup(filters[j].name);
 916                 ret = add_filter(i, tmp);
 917                 free(tmp);
 918                 if (ret < 0)
 919                         goto out;
 920                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 921                         filters[j].name);
 922         }
 923 out:
 924         return ret;
 925 }
 926
 927 static int parse_filter_args(void)
 928 {
 929         int i, j, ret, af_mask;
 930
 931         for (i = 0; i < conf.filter_given; i++) {
 932                 char *arg;
 933                 ret = parse_stream_command(conf.filter_arg[i], &arg);
 934                 if (ret < 0)
 935                         goto out;
 936                 af_mask = ret;
 937                 FOR_EACH_AUDIO_FORMAT(j) {
 938                         if ((af_mask & (1 << j)) == 0) /* no match */
 939                                 continue;
 940                         ret = add_filter(j, arg);
 941                         if (ret < 0)
 942                                 goto out;
 943                 }
 944         }
 945         ret = init_default_filters(); /* use default values for the rest */
 946 out:
 947         return ret;
 948 }
 949
 950 static int parse_stream_args(void)
 951 {
 952         int ret;
 953
 954         ret = parse_receiver_args();
 955         if (ret < 0)
 956                 return ret;
 957         ret = parse_filter_args();
 958         if (ret < 0)
 959                 return ret;
 960         ret = parse_writer_args();
 961         if (ret < 0)
 962                 return ret;
 963         return 1;
 964 }
 965
 966 /* does not unlink socket on errors */
 967 static int audiod_get_socket(void)
 968 {
 969         struct sockaddr_un unix_addr;
 970         int ret, fd;
 971
 972         if (conf.socket_given)
 973                 socket_name = para_strdup(conf.socket_arg);
 974         else {
 975                 char *hn = para_hostname();
 976                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 977                         hn);
 978                 free(hn);
 979         }
 980         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 981         if (conf.force_given)
 982                 unlink(socket_name);
 983         ret = create_local_socket(socket_name, &unix_addr,
 984                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 985         if (ret < 0)
 986                 goto err;
 987         fd = ret;
 988         if (listen(fd , 5) < 0) {
 989                 ret = -ERRNO_TO_PARA_ERROR(errno);
 990                 goto err;
 991         }
 992         ret = mark_fd_nonblocking(fd);
 993         if (ret < 0)
 994                 goto err;
 995         return fd;
 996 err:
 997         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 998         exit(EXIT_FAILURE);
 999 }
1000
1001 static void signal_pre_select(struct sched *s, struct task *t)
1002 {
1003         struct signal_task *st = container_of(t, struct signal_task, task);
1004         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1005 }
1006
1007 static void signal_post_select(struct sched *s, __a_unused struct task *t)
1008 {
1009         int signum;
1010
1011         signum = para_next_signal(&s->rfds);
1012         switch (signum) {
1013         case SIGINT:
1014         case SIGTERM:
1015         case SIGHUP:
1016                 PARA_EMERG_LOG("terminating on signal %d\n", signum);
1017                 clean_exit(EXIT_FAILURE, "caught deadly signal");
1018         }
1019 }
1020
1021 static void signal_setup_default(struct signal_task *st)
1022 {
1023         st->task.pre_select = signal_pre_select;
1024         st->task.post_select = signal_post_select;
1025         sprintf(st->task.status, "signal task");
1026 }
1027
1028 static void command_pre_select(struct sched *s, struct task *t)
1029 {
1030         struct command_task *ct = container_of(t, struct command_task, task);
1031         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1032 }
1033
1034 static void command_post_select(struct sched *s, struct task *t)
1035 {
1036         int ret;
1037         struct command_task *ct = container_of(t, struct command_task, task);
1038         static struct timeval last_status_dump;
1039         struct timeval tmp, delay = {0, 500 * 1000};
1040
1041         tv_add(&last_status_dump, &delay, &tmp);
1042         if (tv_diff(&tmp, now, NULL) < 0) {
1043                 audiod_status_dump();
1044                 last_status_dump = *now;
1045         }
1046
1047         ret = handle_connect(ct->fd, &s->rfds);
1048         if (ret < 0)
1049                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1050         audiod_status_dump();
1051 }
1052
1053 static void init_command_task(struct command_task *ct)
1054 {
1055         ct->task.pre_select = command_pre_select;
1056         ct->task.post_select = command_post_select;
1057         ct->task.error = 0;
1058         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1059         sprintf(ct->task.status, "command task");
1060 }
1061
1062 static void close_stat_pipe(void)
1063 {
1064         if (!stat_task->ct)
1065                 return;
1066         client_close(stat_task->ct);
1067         stat_task->ct = NULL;
1068         clear_and_dump_items();
1069         stat_task->length_seconds = 0;
1070         stat_task->offset_seconds = 0;
1071         stat_task->vss_status = 0;
1072         stat_task->current_audio_format_num = -1;
1073         audiod_status_dump();
1074 }
1075
1076 /**
1077  * close the connection to para_server and exit
1078  *
1079  * \param status the exit status which is passed to exit(3)
1080  * \param msg the log message
1081  *
1082  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1083  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1084  * EXIT_FAILURE.
1085  *
1086  * \sa exit(3)
1087  */
1088 void __noreturn clean_exit(int status, const char *msg)
1089 {
1090         PARA_EMERG_LOG("%s\n", msg);
1091         if (socket_name)
1092                 unlink(socket_name);
1093         close_stat_pipe();
1094         exit(status);
1095 }
1096
1097 /* avoid busy loop if server is down */
1098 static void set_stat_task_restart_barrier(unsigned seconds)
1099 {
1100         struct timeval delay = {seconds, 0};
1101         tv_add(now, &delay, &stat_task->restart_barrier);
1102 }
1103
1104 static void try_to_close_slot(int slot_num)
1105 {
1106         struct slot_info *s = &slot[slot_num];
1107         struct audio_format_info *a = afi + s->format;
1108         int i;
1109
1110         if (s->format < 0)
1111                 return;
1112         if (s->receiver_node && s->receiver_node->task.error >= 0)
1113                 return;
1114         for (i = 0; i < a->num_filters; i++)
1115                 if (s->fns && s->fns[i].task.error >= 0)
1116                         return;
1117         if (a->num_writers > 0) {
1118                 for (i = 0; i < a->num_writers; i++)
1119                         if (s->wns && s->wns[i].task.error >= 0)
1120                                 return;
1121         } else {
1122                 if (s->wns && s->wns[0].task.error >= 0)
1123                         return;
1124         }
1125         PARA_INFO_LOG("closing slot %d\n", slot_num);
1126         close_writers(s);
1127         close_filters(s);
1128         close_receiver(slot_num);
1129         clear_slot(slot_num);
1130 }
1131
1132 /*
1133  * Check if any receivers/filters/writers need to be started and do so if
1134  * necessary.
1135  */
1136 static void start_stop_decoders(void)
1137 {
1138         int i, ret;
1139         struct slot_info *sl;
1140         struct audio_format_info *a;
1141
1142         FOR_EACH_SLOT(i)
1143                 try_to_close_slot(i);
1144         if (audiod_status != AUDIOD_ON ||
1145                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1146                 return notify_receivers(E_NOT_PLAYING);
1147         if (!must_start_decoder())
1148                 return;
1149         ret = open_receiver(stat_task->current_audio_format_num);
1150         if (ret < 0) {
1151                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1152                 return;
1153         }
1154         sl = slot + ret;
1155         a = afi + sl->format;
1156         if (a->num_filters)
1157                 open_filters(sl);
1158         open_writers(sl);
1159         activate_grab_clients(&sched);
1160         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1161 }
1162
1163 static void status_pre_select(struct sched *s, struct task *t)
1164 {
1165         struct status_task *st = container_of(t, struct status_task, task);
1166         int ret, cafn = stat_task->current_audio_format_num;
1167
1168         if (must_start_decoder())
1169                 goto min_delay;
1170         ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1171         if (ret > 0)
1172                 goto min_delay;
1173         if (st->ct && audiod_status == AUDIOD_OFF)
1174                 goto min_delay;
1175         if (!st->ct && audiod_status != AUDIOD_OFF)
1176                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1177         if (cafn >= 0)
1178                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1179         /*
1180          * If para_server is playing we'd like to have a smooth time display
1181          * even if we are running in standby mode. So we request a timeout that
1182          * expires at the next full second.
1183          */
1184         if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1185                 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1186         return;
1187 min_delay:
1188         sched_min_delay(s);
1189 }
1190
1191 /* restart the client task if necessary */
1192 static void status_post_select(struct sched *s, struct task *t)
1193 {
1194         struct status_task *st = container_of(t, struct status_task, task);
1195
1196         if (audiod_status == AUDIOD_OFF) {
1197                 if (!st->ct)
1198                         goto out;
1199                 if (st->ct->task.error >= 0) {
1200                         kill_btrn(&st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
1201                         goto out;
1202                 }
1203                 close_stat_pipe();
1204                 st->clock_diff_count = conf.clock_diff_count_arg;
1205                 goto out;
1206         }
1207         if (st->ct) {
1208                 char *buf;
1209                 size_t sz;
1210                 int ret;
1211                 if (st->ct->task.error < 0) {
1212                         close_stat_pipe();
1213                         goto out;
1214                 }
1215                 if (st->ct->status != CL_RECEIVING)
1216                         goto out;
1217                 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1218                 if (ret <= 0) {
1219                         struct timeval diff;
1220                         tv_diff(now, &st->last_status_read, &diff);
1221                         if (diff.tv_sec > 61)
1222                                 kill_btrn(&st->ct->btrn, &st->ct->task,
1223                                         -E_STATUS_TIMEOUT);
1224                         goto out;
1225                 }
1226                 btr_merge(st->btrn, st->min_iqs);
1227                 sz = btr_next_buffer(st->btrn, &buf);
1228                 ret = for_each_stat_item(buf, sz, update_item);
1229                 if (ret < 0) {
1230                         kill_btrn(&st->ct->btrn, &st->ct->task, ret);
1231                         goto out;
1232                 }
1233                 if (sz != ret) {
1234                         btr_consume(st->btrn, sz - ret);
1235                         st->last_status_read = *now;
1236                         st->min_iqs = 0;
1237                 } else /* current status item crosses buffers */
1238                         st->min_iqs = sz + 1;
1239                 goto out;
1240         }
1241         btr_drain(st->btrn);
1242         st->current_audio_format_num = -1;
1243         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1244                 goto out;
1245         if (st->clock_diff_count) { /* get status only one time */
1246                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1247                 int argc = 5;
1248                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1249                 st->clock_diff_count--;
1250                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1251                 set_stat_task_restart_barrier(2);
1252
1253         } else {
1254                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1255                 int argc = 4;
1256                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
1257                 set_stat_task_restart_barrier(5);
1258         }
1259         free(stat_item_values[SI_BASENAME]);
1260         stat_item_values[SI_BASENAME] = para_strdup(
1261                 "no connection to para_server");
1262         stat_client_write_item(SI_BASENAME);
1263         st->last_status_read = *now;
1264 out:
1265         start_stop_decoders();
1266 }
1267
1268 static void init_status_task(struct status_task *st)
1269 {
1270         memset(st, 0, sizeof(struct status_task));
1271         st->task.pre_select = status_pre_select;
1272         st->task.post_select = status_post_select;
1273         st->sa_time_diff_sign = 1;
1274         st->clock_diff_count = conf.clock_diff_count_arg;
1275         st->current_audio_format_num = -1;
1276         sprintf(st->task.status, "stat");
1277         st->btrn = btr_new_node(&(struct btr_node_description)
1278                 EMBRACE(.name = "stat"));
1279 }
1280
1281 static void set_initial_status(void)
1282 {
1283         audiod_status = AUDIOD_ON;
1284         if (!conf.mode_given)
1285                 return;
1286         if (!strcmp(conf.mode_arg, "sb")) {
1287                 audiod_status = AUDIOD_STANDBY;
1288                 return;
1289         }
1290         if (!strcmp(conf.mode_arg, "off")) {
1291                 audiod_status = AUDIOD_OFF;
1292                 return;
1293         }
1294         if (strcmp(conf.mode_arg, "on"))
1295                 PARA_WARNING_LOG("invalid mode\n");
1296 }
1297
1298 __noreturn static void print_help_and_die(void)
1299 {
1300         int d = conf.detailed_help_given;
1301         const char **p = d? audiod_args_info_detailed_help
1302                 : audiod_args_info_help;
1303
1304         printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1305                 AUDIOD_CMDLINE_PARSER_VERSION);
1306         printf_or_die("%s\n\n", audiod_args_info_usage);
1307         for (; *p; p++)
1308                 printf_or_die("%s\n", *p);
1309         print_receiver_helps(d);
1310         print_filter_helps(d);
1311         print_writer_helps(d);
1312         exit(0);
1313 }
1314
1315 static void init_colors_or_die(void)
1316 {
1317         int i;
1318
1319         if (!want_colors())
1320                 return;
1321         daemon_set_default_log_colors();
1322         daemon_set_flag(DF_COLOR_LOG);
1323         for (i = 0; i < conf.log_color_given; i++)
1324                 daemon_set_log_color_or_die(conf.log_color_arg[i]);
1325 }
1326
1327 /**
1328  * the main function of para_audiod
1329  *
1330  * \param argc usual argument count
1331  * \param argv usual argument vector
1332  *
1333  * \return EXIT_SUCCESS or EXIT_FAILURE
1334  *
1335  * \sa para_audiod(1)
1336  * */
1337 int main(int argc, char *argv[])
1338 {
1339         int ret, i;
1340         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1341         struct audiod_cmdline_parser_params params = {
1342                 .override = 0,
1343                 .initialize = 1,
1344                 .check_required = 0,
1345                 .check_ambiguity = 0,
1346                 .print_errors = 1
1347         };
1348
1349         valid_fd_012();
1350         if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1351                 exit(EXIT_FAILURE);
1352         HANDLE_VERSION_FLAG("audiod", conf);
1353         /* init receivers/filters/writers early to make help work */
1354         recv_init();
1355         filter_init();
1356         writer_init();
1357         if (conf.help_given || conf.detailed_help_given)
1358                 print_help_and_die();
1359         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1360         parse_config_or_die();
1361         init_colors_or_die();
1362         init_random_seed_or_die();
1363         daemon_set_flag(DF_LOG_TIME);
1364         daemon_set_flag(DF_LOG_HOSTNAME);
1365         daemon_set_flag(DF_LOG_LL);
1366         if (conf.log_timing_given)
1367                 daemon_set_flag(DF_LOG_TIMING);
1368         if (conf.logfile_given) {
1369                 daemon_set_logfile(conf.logfile_arg);
1370                 daemon_open_log_or_die();
1371         }
1372         ret = parse_stream_args();
1373         if (ret < 0) {
1374                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1375                 exit(EXIT_FAILURE);
1376         }
1377         log_welcome("para_audiod");
1378         set_server_start_time(NULL);
1379         set_initial_status();
1380         FOR_EACH_SLOT(i)
1381                 clear_slot(i);
1382         setup_signal_handling();
1383         signal_setup_default(sig_task);
1384
1385         init_status_task(stat_task);
1386         init_command_task(cmd_task);
1387
1388         if (conf.daemon_given)
1389                 daemonize(false /* parent exits immediately */);
1390
1391         register_task(&sched, &sig_task->task);
1392         register_task(&sched, &cmd_task->task);
1393         register_task(&sched, &stat_task->task);
1394         sched.default_timeout.tv_sec = 2;
1395         sched.default_timeout.tv_usec = 999 * 1000;
1396         ret = schedule(&sched);
1397
1398         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1399         return EXIT_FAILURE;
1400 }