audiod.c

   1 /*
   2  * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file audiod.c the paraslash's audio daemon */
   8 #include <regex.h>
   9 #include <sys/types.h>
  10 #include <dirent.h>
  11 #include <signal.h>
  12 #include <openssl/rc4.h>
  13 #include <stdbool.h>
  14
  15 #include "para.h"
  16 #include "error.h"
  17 #include "crypt.h"
  18 #include "audiod.cmdline.h"
  19 #include "list.h"
  20 #include "sched.h"
  21 #include "ggo.h"
  22 #include "recv.h"
  23 #include "buffer_tree.h"
  24 #include "filter.h"
  25 #include "grab_client.h"
  26 #include "client.cmdline.h"
  27 #include "client.h"
  28 #include "audiod.h"
  29 #include "net.h"
  30 #include "daemon.h"
  31 #include "string.h"
  32 #include "fd.h"
  33 #include "write.h"
  34 #include "write_common.h"
  35 #include "signal.h"
  36
  37 /** define the array of error lists needed by para_audiod */
  38 INIT_AUDIOD_ERRLISTS;
  39 /** define the array containing all supported audio formats */
  40 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
  41
  42 /** Defines how audiod handles one supported audio format. */
  43 struct audio_format_info {
  44         /** pointer to the receiver for this audio format */
  45         struct receiver *receiver;
  46         /** the receiver configuration */
  47         void *receiver_conf;
  48         /** the number of filters that should be activated for this audio format */
  49         unsigned int num_filters;
  50         /** Array of filter numbers to be activated. */
  51         unsigned *filter_nums;
  52         /** Pointer to the array of filter configurations. */
  53         void **filter_conf;
  54         /** the number of filters that should be activated for this audio format */
  55         unsigned int num_writers;
  56         /** Array of writer numbers to be activated. */
  57         int *writer_nums;
  58         /** pointer to the array of writer configurations */
  59         void **writer_conf;
  60         /** do not start receiver/filters/writer before this time */
  61         struct timeval restart_barrier;
  62 };
  63
  64 /**
  65  * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
  66  * be associated with a receiver/filter/writer triple. This array holds all
  67  * information on the status of these slots.
  68  *
  69  * \sa struct slot_info
  70  * */
  71 struct slot_info slot[MAX_STREAM_SLOTS];
  72
  73 /** The vss status flags audiod is interested in. */
  74 enum vss_status_flags {
  75         /** Whether the 'N' flag is set. */
  76         VSS_STATUS_FLAG_NEXT = 1,
  77         /** The 'P' flag is set. */
  78         VSS_STATUS_FLAG_PLAYING = 2,
  79 };
  80
  81 /**
  82  * The task for obtaining para_server's status (para_client stat).
  83  *
  84  * \sa struct task, struct sched.
  85  */
  86 struct status_task {
  87         /** The associated task structure of audiod. */
  88         struct task task;
  89         /** Client data associated with the stat task. */
  90         struct client_task *ct;
  91         /** Do not restart client command until this time. */
  92         struct timeval restart_barrier;
  93         /** Last time we received status data from para_server. */
  94         struct timeval last_status_read;
  95         size_t min_iqs;
  96         /** The offset value announced by para_server. */
  97         int offset_seconds;
  98         /** The length of the current audio file as announced by para_server. */
  99         int length_seconds;
 100         /** The start of the current stream from the view of para_server. */
 101         struct timeval server_stream_start;
 102         /** The average time deviation between para_server and para_audiod. */
 103         struct timeval sa_time_diff;
 104         /** Whether client time is ahead of server time. */
 105         int sa_time_diff_sign;
 106         /** The 'P' and the 'N' flags as announced by para_server. */
 107         enum vss_status_flags vss_status;
 108         /** Number of times the clock difference is to be checked. */
 109         unsigned clock_diff_count;
 110         /** When to start the next check for clock difference. */
 111         struct timeval clock_diff_barrier;
 112         /** Number of the audio format as announced by para_server. */
 113         int current_audio_format_num;
 114         /* The status task btrn is the child of the client task. */
 115         struct btr_node *btrn;
 116 };
 117
 118 /** The array of status items sent by para_server. */
 119 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 120
 121 /**
 122  * the current mode of operation of which can be changed by the on/off/cycle
 123  * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
 124  */
 125 int audiod_status = AUDIOD_ON;
 126
 127 /**
 128  * the gengetopt args_info struct that holds information on all command line
 129  * arguments
 130  */
 131 struct audiod_args_info conf;
 132
 133 static char *socket_name;
 134 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 135
 136 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
 137
 138 static struct status_task status_task_struct;
 139
 140 /**
 141  * the task that calls the status command of para_server
 142  *
 143  * \sa struct status_task
 144  */
 145 static struct status_task *stat_task = &status_task_struct;
 146
 147 /**
 148  * the task for handling audiod commands
 149  *
 150  * \sa struct task, struct sched
 151  */
 152 struct command_task {
 153         /** the local listening socket */
 154         int fd;
 155         /** the associated task structure */
 156         struct task task;
 157 };
 158
 159 /** iterate over all supported audio formats */
 160 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 161
 162 /**
 163  * Get the audio format number.
 164  *
 165  * \param name The name of the audio format.
 166  *
 167  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
 168  * \a name is not a supported audio format.
 169  */
 170 int get_audio_format_num(const char *name)
 171 {
 172         int i;
 173
 174         while (para_isspace(*name))
 175                 name++;
 176         FOR_EACH_AUDIO_FORMAT(i)
 177                 if (!strcmp(name, audio_formats[i]))
 178                         return i;
 179         return -E_UNSUPPORTED_AUDIO_FORMAT;
 180 }
 181
 182 /**
 183  * Compute the play time based on information of the given slot.
 184  *
 185  * \param slot_num The slot number (negative means: no slot).
 186  *
 187  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 188  * from the status items received from para_server and the start time of the
 189  * (first) writer of the given slot.
 190  *
 191  * It has to to take into account that probably the stream was not started at
 192  * the beginning of the file, that the clock between the server and the client
 193  * host may differ and that playback of the stream was delayed, e.g. because
 194  * the prebuffer filter is used in the filter configuration of the given slot.
 195  *
 196  * If no writer is active in the given slot, or \a slot_num is negative
 197  * (indicating that para_audiod runs in standby mode), an approximation based
 198  * only on the status items is computed and the returned string is prefixed
 199  * with "~".
 200  *
 201  * \return A string that must be freed by the caller.
 202  */
 203 char *get_time_string(int slot_num)
 204 {
 205         int ret, seconds = 0, length;
 206         struct timeval *tmp, sum, sss, /* server stream start */
 207                 rstime, /* receiver start time */
 208                 wstime, /* writer start time */
 209                 wtime, /* now - writer start */
 210                 rskip; /* receiver start - sss */
 211         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 212         char *msg;
 213
 214         if (audiod_status == AUDIOD_OFF)
 215                 goto empty;
 216         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 217                 if (stat_task->length_seconds) /* paused */
 218                         return NULL;
 219                 goto empty; /* stopped */
 220         }
 221         if (audiod_status == AUDIOD_ON && !s)
 222                 goto empty;
 223         /*
 224          * Valid status items and playing, set length and tmp to the stream
 225          * start. We use the slot info and fall back to the info from current
 226          * status items if no slot info is available.
 227          */
 228         length = stat_task->length_seconds;
 229         tmp = &stat_task->server_stream_start;
 230         if (s && s->wns) { /* writer active in this slot */
 231                 btr_get_node_start(s->wns[0].btrn, &wstime);
 232                 if (wstime.tv_sec != 0) { /* writer wrote something */
 233                         if (s->server_stream_start.tv_sec == 0) {
 234                                 /* copy status info to slot */
 235                                 s->server_stream_start = stat_task->server_stream_start;
 236                                 s->offset_seconds = stat_task->offset_seconds;
 237                                 s->seconds_total = stat_task->length_seconds;
 238                         }
 239                         length = s->seconds_total;
 240                         tmp = &s->server_stream_start;
 241                 }
 242         }
 243         if (stat_task->sa_time_diff_sign > 0)
 244                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 245         else
 246                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 247         if (!s || !s->wns) {
 248                 struct timeval diff;
 249                 tv_diff(now, &sss, &diff);
 250                 seconds = diff.tv_sec + stat_task->offset_seconds;
 251                 goto out;
 252         }
 253         tv_diff(now, &wstime, &wtime);
 254         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 255         seconds = s->offset_seconds;
 256         btr_get_node_start(s->receiver_node->btrn, &rstime);
 257         ret = tv_diff(&rstime, &sss, &rskip);
 258         if (ret > 0) { /* audiod was started in the middle of the stream */
 259                 tv_add(&wtime, &rskip, &sum);
 260                 seconds += sum.tv_sec;
 261         } else
 262                 seconds += wtime.tv_sec;
 263 out:
 264         seconds = PARA_MIN(seconds, length);
 265         seconds = PARA_MAX(seconds, 0);
 266         msg = make_message(
 267                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 268                 s? "" : "~",
 269                 seconds / 60,
 270                 seconds % 60,
 271                 (length - seconds) / 60,
 272                 (length - seconds) % 60,
 273                 length? (seconds * 100 + length / 2) / length : 0,
 274                 length / 60,
 275                 length % 60
 276         );
 277         PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 278         return msg;
 279 empty:
 280         return para_strdup(NULL);
 281 }
 282
 283 static int want_colors(void)
 284 {
 285         if (conf.color_arg == color_arg_no)
 286                 return 0;
 287         if (conf.color_arg == color_arg_yes)
 288                 return 1;
 289         if (conf.logfile_given)
 290                 return 0;
 291         return isatty(STDERR_FILENO);
 292 }
 293
 294 static void parse_config_or_die(void)
 295 {
 296         int ret;
 297         char *config_file;
 298         struct audiod_cmdline_parser_params params = {
 299                 .override = 0,
 300                 .initialize = 0,
 301                 .check_required = 1,
 302                 .check_ambiguity = 0,
 303                 .print_errors = 1
 304         };
 305
 306         if (conf.config_file_given)
 307                 config_file = para_strdup(conf.config_file_arg);
 308         else {
 309                 char *home = para_homedir();
 310                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 311                 free(home);
 312         }
 313         ret = file_exists(config_file);
 314         if (conf.config_file_given && !ret) {
 315                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 316                 goto err;
 317         }
 318         if (ret)
 319                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 320         free(config_file);
 321         daemon_set_loglevel(conf.loglevel_arg);
 322         return;
 323 err:
 324         free(config_file);
 325         exit(EXIT_FAILURE);
 326 }
 327
 328 static void setup_signal_handling(void)
 329 {
 330         sig_task->fd = para_signal_init();
 331         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 332         para_install_sighandler(SIGINT);
 333         para_install_sighandler(SIGTERM);
 334         para_install_sighandler(SIGHUP);
 335         para_sigaction(SIGPIPE, SIG_IGN);
 336 }
 337
 338 static void clear_slot(int slot_num)
 339 {
 340         struct slot_info *s = &slot[slot_num];
 341
 342         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 343         memset(s, 0, sizeof(struct slot_info));
 344         s->format = -1;
 345 }
 346
 347 static void close_receiver(int slot_num)
 348 {
 349         struct slot_info *s = &slot[slot_num];
 350         struct audio_format_info *a;
 351
 352         if (s->format < 0 || !s->receiver_node)
 353                 return;
 354         a = &afi[s->format];
 355         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 356                 audio_formats[s->format], slot_num);
 357         a->receiver->close(s->receiver_node);
 358         btr_free_node(s->receiver_node->btrn);
 359         free(s->receiver_node);
 360         s->receiver_node = NULL;
 361         tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
 362                 &a->restart_barrier);
 363 }
 364
 365 static void writer_cleanup(struct writer_node *wn)
 366 {
 367         struct writer *w;
 368
 369         if (!wn)
 370                 return;
 371         w = writers + wn->writer_num;
 372         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 373         w->close(wn);
 374         btr_free_node(wn->btrn);
 375 }
 376
 377 static void close_writers(struct slot_info *s)
 378 {
 379         struct audio_format_info *a;
 380         int i;
 381
 382         if (s->format < 0)
 383                 return;
 384         assert(s->wns);
 385         a = afi + s->format;
 386         if (a->num_writers == 0)
 387                 writer_cleanup(s->wns);
 388         else {
 389                 for (i = 0; i < a->num_writers; i++)
 390                         writer_cleanup(s->wns + i);
 391         }
 392         free(s->wns);
 393         s->wns = NULL;
 394 }
 395
 396 static void close_filters(struct slot_info *s)
 397 {
 398         int i;
 399         struct audio_format_info *a = afi + s->format;
 400         if (a->num_filters == 0)
 401                 return;
 402         for (i = 0; i < a->num_filters; i++) {
 403                 struct filter_node *fn = s->fns + i;
 404                 struct filter *f;
 405
 406                 if (!fn)
 407                         continue;
 408                 f = filters + fn->filter_num;
 409                 if (f->close)
 410                         f->close(fn);
 411                 btr_free_node(fn->btrn);
 412         }
 413         free(s->fns);
 414         s->fns = NULL;
 415 }
 416
 417 /*
 418  * Whenever a task commits suicide by returning from post_select with t->error
 419  * < 0, it also removes its btr node. We do exactly that to kill a running
 420  * task. Note that the scheduler checks t->error also _before_ each pre/post
 421  * select call, so the victim will never be scheduled again.
 422  */
 423 static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
 424 {
 425         if (t->error < 0)
 426                 return;
 427         t->error = error;
 428         btr_remove_node(btrn);
 429 }
 430
 431 static void kill_all_decoders(int error)
 432 {
 433         int i, j;
 434
 435         FOR_EACH_SLOT(i) {
 436                 struct slot_info *s = &slot[i];
 437                 struct audio_format_info *a;
 438                 if (s->format < 0)
 439                         continue;
 440                 a = afi + s->format;
 441                 if (s->wns)
 442                         for (j = 0; j < a->num_writers; j++)
 443                                 kill_btrn(s->wns[j].btrn, &s->wns[j].task, error);
 444                 if (s->fns)
 445                         for (j = 0; j < a->num_writers; j++)
 446                                 kill_btrn(s->fns[j].btrn, &s->wns[j].task, error);
 447                 if (s->receiver_node)
 448                         kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
 449                                 error);
 450         }
 451 }
 452
 453 static int get_empty_slot(void)
 454 {
 455         int i;
 456         struct slot_info *s;
 457
 458         FOR_EACH_SLOT(i) {
 459                 s = &slot[i];
 460                 if (s->format < 0) {
 461                         clear_slot(i);
 462                         return i;
 463                 }
 464                 if (s->wns || s->receiver_node || s->fns)
 465                         continue;
 466                 clear_slot(i);
 467                 return i;
 468         }
 469         return -E_NO_MORE_SLOTS;
 470 }
 471
 472 /**
 473  * get the number of filters
 474  *
 475  * \param audio_format_num the number identifying the audio format
 476  *
 477  * \return the number of filters for the given audio format
 478  *
 479  * \sa struct filter;
 480  */
 481 int num_filters(int audio_format_num)
 482 {
 483         return afi[audio_format_num].num_filters;
 484 }
 485
 486 static void open_filters(struct slot_info *s)
 487 {
 488         struct audio_format_info *a = afi + s->format;
 489         struct filter_node *fn;
 490         int nf = a->num_filters;
 491         struct btr_node *parent;
 492         int i;
 493
 494         if (nf == 0)
 495                 return;
 496         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 497         assert(s->fns == NULL);
 498         s->fns = para_calloc(nf * sizeof(struct filter_node));
 499         parent = s->receiver_node->btrn;
 500         for (i = 0; i < nf; i++) {
 501                 struct filter *f = filters + a->filter_nums[i];
 502                 fn = s->fns + i;
 503                 fn->filter_num = a->filter_nums[i];
 504                 fn->conf = a->filter_conf[i];
 505                 fn->task.pre_select = f->pre_select;
 506                 fn->task.post_select = f->post_select;
 507
 508                 fn->btrn = btr_new_node(&(struct btr_node_description)
 509                         EMBRACE(.name = f->name, .parent = parent,
 510                                 .handler = f->execute, .context = fn));
 511
 512                 f->open(fn);
 513                 register_task(&fn->task);
 514                 parent = fn->btrn;
 515                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 516                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 517                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 518         }
 519 }
 520
 521 static void open_writers(struct slot_info *s)
 522 {
 523         int i;
 524         struct audio_format_info *a = afi + s->format;
 525         struct writer_node *wn;
 526         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 527
 528         assert(s->wns == NULL);
 529         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 530                 * sizeof(struct writer_node));
 531         if (a->num_writers == 0)
 532                 setup_writer_node(NULL, parent, s->wns);
 533         else {
 534                 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 535                 for (i = 0; i < a->num_writers; i++) {
 536                         wn = s->wns + i;
 537                         wn->conf = a->writer_conf[i];
 538                         wn->writer_num = a->writer_nums[i];
 539                         register_writer_node(wn, parent);
 540                 }
 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_free_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(&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         char *p = strchr(txt, ':');
 742         int i;
 743
 744         if (!p)
 745                 return -E_MISSING_COLON;
 746         p++;
 747         FOR_EACH_AUDIO_FORMAT(i) {
 748                 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
 749                         continue;
 750                 *cmd = p;
 751                 return i;
 752         }
 753         return -E_UNSUPPORTED_AUDIO_FORMAT;
 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
 761         filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
 762         if (filter_num < 0)
 763                 return filter_num;
 764         a->filter_nums[nf] = filter_num;
 765         a->num_filters++;
 766         PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
 767                 filters[filter_num].name);
 768         return filter_num;
 769 }
 770
 771 static int parse_writer_args(void)
 772 {
 773         int i, ret, nw;
 774         char *cmd;
 775         struct audio_format_info *a;
 776
 777         nw = PARA_MAX(1U, conf.writer_given);
 778         PARA_INFO_LOG("maximal number of writers: %d\n", nw);
 779         FOR_EACH_AUDIO_FORMAT(i) {
 780                 a = &afi[i];
 781                 a->writer_conf = para_malloc(nw * sizeof(void *));
 782                 a->writer_nums = para_malloc(nw * sizeof(int));
 783                 a->num_writers = 0;
 784         }
 785         for (i = 0; i < conf.writer_given; i++) {
 786                 void *wconf;
 787                 int writer_num;
 788                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 789                 if (ret < 0)
 790                         goto out;
 791                 a = &afi[ret];
 792                 nw = a->num_writers;
 793                 wconf = check_writer_arg(cmd, &writer_num);
 794                 if (!wconf) {
 795                         ret = writer_num;
 796                         goto out;
 797                 }
 798                 a->writer_nums[nw] = writer_num;
 799                 a->writer_conf[nw] = wconf;
 800                 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
 801                         nw, writer_names[writer_num]);
 802                 a->num_writers++;
 803         }
 804         ret = 1;
 805 out:
 806         return ret;
 807 }
 808
 809 static int parse_receiver_args(void)
 810 {
 811         int i, ret, receiver_num;
 812         char *cmd = NULL;
 813         struct audio_format_info *a;
 814
 815         for (i = conf.receiver_given - 1; i >= 0; i--) {
 816                 char *arg = conf.receiver_arg[i];
 817                 char *recv_arg = strchr(arg, ':');
 818                 ret = -E_MISSING_COLON;
 819                 if (!recv_arg)
 820                         goto out;
 821                 *recv_arg = '\0';
 822                 recv_arg++;
 823                 ret = get_audio_format_num(arg);
 824                 if (ret < 0)
 825                         goto out;
 826                 /*
 827                  * If multiple receivers are given for this audio format, the
 828                  * last one wins and we have to free the previous receiver
 829                  * config here. Since we are iterating backwards, the winning
 830                  * receiver arg is in fact the first one given.
 831                  */
 832                 if (afi[ret].receiver_conf)
 833                         afi[ret].receiver->free_config(afi[ret].receiver_conf);
 834                 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
 835                 if (!afi[ret].receiver_conf) {
 836                         ret = -E_RECV_SYNTAX;
 837                         goto out;
 838                 }
 839                 afi[ret].receiver = &receivers[receiver_num];
 840         }
 841         /*
 842          * Use the first available receiver with no arguments for those audio
 843          * formats for which no receiver was specified.
 844          */
 845         cmd = para_strdup(receivers[0].name);
 846         FOR_EACH_AUDIO_FORMAT(i) {
 847                 a = &afi[i];
 848                 if (a->receiver_conf)
 849                         continue;
 850                 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
 851                 if (!a->receiver_conf)
 852                         return -E_RECV_SYNTAX;
 853                 a->receiver = &receivers[receiver_num];
 854         }
 855         ret = 1;
 856 out:
 857         free(cmd);
 858         return ret;
 859 }
 860
 861 static int init_default_filters(void)
 862 {
 863         int i, ret = 1;
 864
 865         FOR_EACH_AUDIO_FORMAT(i) {
 866                 struct audio_format_info *a = &afi[i];
 867                 char *tmp;
 868                 int j;
 869
 870                 if (a->num_filters)
 871                         continue; /* no default -- nothing to to */
 872                 /*
 873                  * If udp is used to receive this audiod format, add fecdec as
 874                  * the first filter.
 875                  */
 876                 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
 877                                 strcmp(afi[i].receiver->name, "dccp") == 0) {
 878                         tmp = para_strdup("fecdec");
 879                         add_filter(i, tmp);
 880                         free(tmp);
 881                         if (ret < 0)
 882                                 goto out;
 883                 }
 884                 /* add "dec" to audio format name */
 885                 tmp = make_message("%sdec", audio_formats[i]);
 886                 for (j = 0; filters[j].name; j++)
 887                         if (!strcmp(tmp, filters[j].name))
 888                                 break;
 889                 free(tmp);
 890                 ret = -E_UNSUPPORTED_FILTER;
 891                 if (!filters[j].name)
 892                         goto out;
 893                 tmp = para_strdup(filters[j].name);
 894                 ret = add_filter(i, tmp);
 895                 free(tmp);
 896                 if (ret < 0)
 897                         goto out;
 898                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 899                         filters[j].name);
 900         }
 901 out:
 902         return ret;
 903 }
 904
 905 static int parse_filter_args(void)
 906 {
 907         int i, ret, nf;
 908
 909         nf = PARA_MAX(2U, conf.filter_given);
 910         PARA_INFO_LOG("maximal number of filters: %d\n", nf);
 911         FOR_EACH_AUDIO_FORMAT(i) {
 912                 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
 913                 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
 914         }
 915         if (!conf.no_default_filters_given)
 916                 return init_default_filters();
 917         for (i = 0; i < conf.filter_given; i++) {
 918                 char *arg = conf.filter_arg[i];
 919                 char *filter_name = strchr(arg, ':');
 920                 ret = -E_MISSING_COLON;
 921                 if (!filter_name)
 922                         goto out;
 923                 *filter_name = '\0';
 924                 filter_name++;
 925                 ret = get_audio_format_num(arg);
 926                 if (ret < 0)
 927                         goto out;
 928                 ret = add_filter(ret, filter_name);
 929                 if (ret < 0)
 930                         goto out;
 931         }
 932         ret = init_default_filters(); /* use default values for the rest */
 933 out:
 934         return ret;
 935 }
 936
 937 static int parse_stream_args(void)
 938 {
 939         int ret;
 940
 941         ret = parse_receiver_args();
 942         if (ret < 0)
 943                 return ret;
 944         ret = parse_filter_args();
 945         if (ret < 0)
 946                 return ret;
 947         ret = parse_writer_args();
 948         if (ret < 0)
 949                 return ret;
 950         return 1;
 951 }
 952
 953 /* does not unlink socket on errors */
 954 static int audiod_get_socket(void)
 955 {
 956         struct sockaddr_un unix_addr;
 957         int ret, fd;
 958
 959         if (conf.socket_given)
 960                 socket_name = para_strdup(conf.socket_arg);
 961         else {
 962                 char *hn = para_hostname();
 963                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 964                         hn);
 965                 free(hn);
 966         }
 967         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 968         if (conf.force_given)
 969                 unlink(socket_name);
 970         ret = create_local_socket(socket_name, &unix_addr,
 971                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 972         if (ret < 0)
 973                 goto err;
 974         fd = ret;
 975         if (listen(fd , 5) < 0) {
 976                 ret = -ERRNO_TO_PARA_ERROR(errno);
 977                 goto err;
 978         }
 979         ret = mark_fd_nonblocking(fd);
 980         if (ret < 0)
 981                 goto err;
 982         return fd;
 983 err:
 984         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 985         exit(EXIT_FAILURE);
 986 }
 987
 988 static void signal_pre_select(struct sched *s, struct task *t)
 989 {
 990         struct signal_task *st = container_of(t, struct signal_task, task);
 991         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 992 }
 993
 994 static void signal_post_select(struct sched *s, __a_unused struct task *t)
 995 {
 996         int signum;
 997
 998         signum = para_next_signal(&s->rfds);
 999         switch (signum) {
1000         case SIGINT:
1001         case SIGTERM:
1002         case SIGHUP:
1003                 PARA_EMERG_LOG("terminating on signal %d\n", signum);
1004                 clean_exit(EXIT_FAILURE, "caught deadly signal");
1005         }
1006 }
1007
1008 static void signal_setup_default(struct signal_task *st)
1009 {
1010         st->task.pre_select = signal_pre_select;
1011         st->task.post_select = signal_post_select;
1012         sprintf(st->task.status, "signal task");
1013 }
1014
1015 static void command_pre_select(struct sched *s, struct task *t)
1016 {
1017         struct command_task *ct = container_of(t, struct command_task, task);
1018         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1019 }
1020
1021 static void command_post_select(struct sched *s, struct task *t)
1022 {
1023         int ret;
1024         struct command_task *ct = container_of(t, struct command_task, task);
1025         static struct timeval last_status_dump;
1026         struct timeval tmp, delay = {0, 500 * 1000};
1027
1028         tv_add(&last_status_dump, &delay, &tmp);
1029         if (tv_diff(&tmp, now, NULL) < 0) {
1030                 audiod_status_dump();
1031                 last_status_dump = *now;
1032         }
1033
1034         ret = handle_connect(ct->fd, &s->rfds);
1035         if (ret < 0)
1036                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1037         audiod_status_dump();
1038 }
1039
1040 static void init_command_task(struct command_task *ct)
1041 {
1042         ct->task.pre_select = command_pre_select;
1043         ct->task.post_select = command_post_select;
1044         ct->task.error = 0;
1045         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1046         sprintf(ct->task.status, "command task");
1047 }
1048
1049 static void close_stat_pipe(void)
1050 {
1051         if (!stat_task->ct)
1052                 return;
1053         btr_free_node(stat_task->ct->btrn);
1054         client_close(stat_task->ct);
1055         stat_task->ct = NULL;
1056         clear_and_dump_items();
1057         stat_task->length_seconds = 0;
1058         stat_task->offset_seconds = 0;
1059         stat_task->vss_status = 0;
1060         stat_task->current_audio_format_num = -1;
1061         audiod_status_dump();
1062 }
1063
1064 /**
1065  * close the connection to para_server and exit
1066  *
1067  * \param status the exit status which is passed to exit(3)
1068  * \param msg the log message
1069  *
1070  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1071  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1072  * EXIT_FAILURE.
1073  *
1074  * \sa exit(3)
1075  */
1076 void __noreturn clean_exit(int status, const char *msg)
1077 {
1078         PARA_EMERG_LOG("%s\n", msg);
1079         if (socket_name)
1080                 unlink(socket_name);
1081         close_stat_pipe();
1082         exit(status);
1083 }
1084
1085 /* avoid busy loop if server is down */
1086 static void set_stat_task_restart_barrier(unsigned seconds)
1087 {
1088         struct timeval delay = {seconds, 0};
1089         tv_add(now, &delay, &stat_task->restart_barrier);
1090 }
1091
1092 static void try_to_close_slot(int slot_num)
1093 {
1094         struct slot_info *s = &slot[slot_num];
1095         struct audio_format_info *a = afi + s->format;
1096         int i;
1097
1098         if (s->format < 0)
1099                 return;
1100         if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
1101                 return;
1102         for (i = 0; i < a->num_filters; i++)
1103                 if (s->fns && s->fns[i].task.error != -E_TASK_UNREGISTERED)
1104                         return;
1105         if (a->num_writers > 0) {
1106                 for (i = 0; i < a->num_writers; i++)
1107                         if (s->wns && s->wns[i].task.error != -E_TASK_UNREGISTERED)
1108                                 return;
1109         } else {
1110                 if (s->wns && s->wns[0].task.error != -E_TASK_UNREGISTERED)
1111                         return;
1112         }
1113         PARA_INFO_LOG("closing slot %d\n", slot_num);
1114         close_writers(s);
1115         close_filters(s);
1116         close_receiver(slot_num);
1117         clear_slot(slot_num);
1118 }
1119
1120 /*
1121  * Check if any receivers/filters/writers need to be started and do so if
1122  * necessary.
1123  */
1124 static void start_stop_decoders(void)
1125 {
1126         int i, ret;
1127         struct slot_info *sl;
1128         struct audio_format_info *a;
1129
1130         FOR_EACH_SLOT(i)
1131                 try_to_close_slot(i);
1132         if (audiod_status != AUDIOD_ON ||
1133                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1134                 return kill_all_decoders(-E_NOT_PLAYING);
1135         if (!must_start_decoder())
1136                 return;
1137         ret = open_receiver(stat_task->current_audio_format_num);
1138         if (ret < 0) {
1139                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1140                 return;
1141         }
1142         sl = slot + ret;
1143         a = afi + sl->format;
1144         if (a->num_filters)
1145                 open_filters(sl);
1146         open_writers(sl);
1147         activate_grab_clients();
1148         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1149 }
1150
1151 static void status_pre_select(struct sched *s, struct task *t)
1152 {
1153         struct status_task *st = container_of(t, struct status_task, task);
1154         int ret, cafn = stat_task->current_audio_format_num;
1155
1156         if (must_start_decoder())
1157                 goto min_delay;
1158         ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
1159         if (ret > 0)
1160                 goto min_delay;
1161         if (st->ct && audiod_status == AUDIOD_OFF)
1162                 goto min_delay;
1163         if (!st->ct && audiod_status != AUDIOD_OFF)
1164                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1165         if (cafn >= 0)
1166                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1167         /*
1168          * If para_server is playing we'd like to have a smooth time display
1169          * even if we are running in standby mode. So we request a timeout that
1170          * expires at the next full second.
1171          */
1172         if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1173                 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1174         return;
1175 min_delay:
1176         sched_min_delay(s);
1177 }
1178
1179 /* restart the client task if necessary */
1180 static void status_post_select(__a_unused struct sched *s, struct task *t)
1181 {
1182         struct status_task *st = container_of(t, struct status_task, task);
1183
1184         if (audiod_status == AUDIOD_OFF) {
1185                 if (!st->ct)
1186                         goto out;
1187                 if (st->ct->task.error >= 0) {
1188                         kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
1189                         goto out;
1190                 }
1191                 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1192                         goto out;
1193                 close_stat_pipe();
1194                 st->clock_diff_count = conf.clock_diff_count_arg;
1195                 goto out;
1196         }
1197         if (st->ct) {
1198                 char *buf;
1199                 size_t sz;
1200                 int ret;
1201                 if (st->ct->task.error < 0) {
1202                         if (st->ct->task.error != -E_TASK_UNREGISTERED)
1203                                 goto out;
1204                         close_stat_pipe();
1205                         goto out;
1206                 }
1207                 if (st->ct->status != CL_RECEIVING)
1208                         goto out;
1209                 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1210                 if (ret <= 0) {
1211                         struct timeval diff;
1212                         tv_diff(now, &st->last_status_read, &diff);
1213                         if (diff.tv_sec > 61)
1214                                 kill_btrn(st->ct->btrn, &st->ct->task,
1215                                         -E_STATUS_TIMEOUT);
1216                         goto out;
1217                 }
1218                 btr_merge(st->btrn, st->min_iqs);
1219                 sz = btr_next_buffer(st->btrn, &buf);
1220                 ret = for_each_stat_item(buf, sz, update_item);
1221                 if (ret < 0) {
1222                         kill_btrn(st->ct->btrn, &st->ct->task, ret);
1223                         goto out;
1224                 }
1225                 if (sz != ret) {
1226                         btr_consume(st->btrn, sz - ret);
1227                         st->last_status_read = *now;
1228                         st->min_iqs = 0;
1229                 } else /* current status item crosses buffers */
1230                         st->min_iqs = sz + 1;
1231                 goto out;
1232         }
1233         btr_drain(st->btrn);
1234         st->current_audio_format_num = -1;
1235         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1236                 goto out;
1237         if (st->clock_diff_count) { /* get status only one time */
1238                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1239                 int argc = 5;
1240                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1241                 st->clock_diff_count--;
1242                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1243                 set_stat_task_restart_barrier(2);
1244
1245         } else {
1246                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1247                 int argc = 4;
1248                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1249                 set_stat_task_restart_barrier(5);
1250         }
1251         free(stat_item_values[SI_BASENAME]);
1252         stat_item_values[SI_BASENAME] = para_strdup(
1253                 "no connection to para_server");
1254         stat_client_write_item(SI_BASENAME);
1255         st->last_status_read = *now;
1256 out:
1257         start_stop_decoders();
1258 }
1259
1260 static void init_status_task(struct status_task *st)
1261 {
1262         memset(st, 0, sizeof(struct status_task));
1263         st->task.pre_select = status_pre_select;
1264         st->task.post_select = status_post_select;
1265         st->sa_time_diff_sign = 1;
1266         st->clock_diff_count = conf.clock_diff_count_arg;
1267         st->current_audio_format_num = -1;
1268         sprintf(st->task.status, "stat");
1269         st->btrn = btr_new_node(&(struct btr_node_description)
1270                 EMBRACE(.name = "stat"));
1271 }
1272
1273 static void set_initial_status(void)
1274 {
1275         audiod_status = AUDIOD_ON;
1276         if (!conf.mode_given)
1277                 return;
1278         if (!strcmp(conf.mode_arg, "sb")) {
1279                 audiod_status = AUDIOD_STANDBY;
1280                 return;
1281         }
1282         if (!strcmp(conf.mode_arg, "off")) {
1283                 audiod_status = AUDIOD_OFF;
1284                 return;
1285         }
1286         if (strcmp(conf.mode_arg, "on"))
1287                 PARA_WARNING_LOG("invalid mode\n");
1288 }
1289
1290 __noreturn static void print_help_and_die(void)
1291 {
1292         int d = conf.detailed_help_given;
1293         const char **p = d? audiod_args_info_detailed_help
1294                 : audiod_args_info_help;
1295
1296         printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1297                 AUDIOD_CMDLINE_PARSER_VERSION);
1298         printf_or_die("%s\n\n", audiod_args_info_usage);
1299         for (; *p; p++)
1300                 printf_or_die("%s\n", *p);
1301         print_receiver_helps(d);
1302         print_filter_helps(d);
1303         print_writer_helps(d);
1304         exit(0);
1305 }
1306
1307 static void init_colors_or_die(void)
1308 {
1309         int i;
1310
1311         if (!want_colors())
1312                 return;
1313         daemon_set_default_log_colors();
1314         daemon_set_flag(DF_COLOR_LOG);
1315         for (i = 0; i < conf.log_color_given; i++)
1316                 daemon_set_log_color_or_die(conf.log_color_arg[i]);
1317 }
1318
1319 /**
1320  * the main function of para_audiod
1321  *
1322  * \param argc usual argument count
1323  * \param argv usual argument vector
1324  *
1325  * \return EXIT_SUCCESS or EXIT_FAILURE
1326  *
1327  * \sa para_audiod(1)
1328  * */
1329 int main(int argc, char *argv[])
1330 {
1331         int ret, i;
1332         static struct sched s;
1333         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1334         struct audiod_cmdline_parser_params params = {
1335                 .override = 0,
1336                 .initialize = 1,
1337                 .check_required = 0,
1338                 .check_ambiguity = 0,
1339                 .print_errors = 1
1340         };
1341
1342         valid_fd_012();
1343         if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1344                 exit(EXIT_FAILURE);
1345         HANDLE_VERSION_FLAG("audiod", conf);
1346         /* init receivers/filters/writers early to make help work */
1347         recv_init();
1348         filter_init();
1349         writer_init();
1350         if (conf.help_given || conf.detailed_help_given)
1351                 print_help_and_die();
1352         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1353         parse_config_or_die();
1354         init_colors_or_die();
1355         init_random_seed_or_die();
1356         daemon_set_flag(DF_LOG_TIME);
1357         daemon_set_flag(DF_LOG_HOSTNAME);
1358         daemon_set_flag(DF_LOG_LL);
1359         if (conf.log_timing_given)
1360                 daemon_set_flag(DF_LOG_TIMING);
1361         if (conf.logfile_given) {
1362                 daemon_set_logfile(conf.logfile_arg);
1363                 daemon_open_log_or_die();
1364         }
1365         ret = parse_stream_args();
1366         if (ret < 0) {
1367                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1368                 exit(EXIT_FAILURE);
1369         }
1370         log_welcome("para_audiod");
1371         server_uptime(UPTIME_SET);
1372         set_initial_status();
1373         FOR_EACH_SLOT(i)
1374                 clear_slot(i);
1375         setup_signal_handling();
1376         signal_setup_default(sig_task);
1377
1378         init_status_task(stat_task);
1379         init_command_task(cmd_task);
1380
1381         if (conf.daemon_given)
1382                 daemonize();
1383
1384         register_task(&sig_task->task);
1385         register_task(&cmd_task->task);
1386         register_task(&stat_task->task);
1387         s.default_timeout.tv_sec = 2;
1388         s.default_timeout.tv_usec = 999 * 1000;
1389         ret = schedule(&s);
1390
1391         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1392         return EXIT_FAILURE;
1393 }