audiod.c

   1 /*
   2  * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file audiod.c the paraslash's audio daemon */
   8 #include <regex.h>
   9 #include <sys/types.h>
  10 #include <signal.h>
  11 #include <stdbool.h>
  12
  13 #include "para.h"
  14 #include "error.h"
  15 #include "crypt.h"
  16 #include "audiod.cmdline.h"
  17 #include "list.h"
  18 #include "sched.h"
  19 #include "ggo.h"
  20 #include "recv.h"
  21 #include "buffer_tree.h"
  22 #include "filter.h"
  23 #include "grab_client.h"
  24 #include "client.cmdline.h"
  25 #include "client.h"
  26 #include "audiod.h"
  27 #include "net.h"
  28 #include "daemon.h"
  29 #include "string.h"
  30 #include "fd.h"
  31 #include "write.h"
  32 #include "write_common.h"
  33 #include "signal.h"
  34 #include "version.h"
  35
  36 /** define the array of error lists needed by para_audiod */
  37 INIT_AUDIOD_ERRLISTS;
  38 /** define the array containing all supported audio formats */
  39 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
  40
  41 /** Defines how audiod handles one supported audio format. */
  42 struct audio_format_info {
  43         /** pointer to the receiver for this audio format */
  44         struct receiver *receiver;
  45         /** the receiver configuration */
  46         void *receiver_conf;
  47         /** the number of filters that should be activated for this audio format */
  48         unsigned int num_filters;
  49         /** Array of filter numbers to be activated. */
  50         unsigned *filter_nums;
  51         /** Pointer to the array of filter configurations. */
  52         void **filter_conf;
  53         /** the number of filters that should be activated for this audio format */
  54         unsigned int num_writers;
  55         /** Array of writer numbers to be activated. */
  56         int *writer_nums;
  57         /** pointer to the array of writer configurations */
  58         void **writer_conf;
  59         /** do not start receiver/filters/writer before this time */
  60         struct timeval restart_barrier;
  61 };
  62
  63 /**
  64  * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
  65  * be associated with a receiver/filter/writer triple. This array holds all
  66  * information on the status of these slots.
  67  *
  68  * \sa struct slot_info
  69  * */
  70 struct slot_info slot[MAX_STREAM_SLOTS];
  71
  72 /** The vss status flags audiod is interested in. */
  73 enum vss_status_flags {
  74         /** Whether the 'N' flag is set. */
  75         VSS_STATUS_FLAG_NEXT = 1,
  76         /** The 'P' flag is set. */
  77         VSS_STATUS_FLAG_PLAYING = 2,
  78 };
  79
  80 /**
  81  * The task for obtaining para_server's status (para_client stat).
  82  *
  83  * \sa struct task, struct sched.
  84  */
  85 struct status_task {
  86         /** The associated task structure of audiod. */
  87         struct task task;
  88         /** Client data associated with the stat task. */
  89         struct client_task *ct;
  90         /** Do not restart client command until this time. */
  91         struct timeval restart_barrier;
  92         /** Last time we received status data from para_server. */
  93         struct timeval last_status_read;
  94         size_t min_iqs;
  95         /** The offset value announced by para_server. */
  96         int offset_seconds;
  97         /** The length of the current audio file as announced by para_server. */
  98         int length_seconds;
  99         /** The start of the current stream from the view of para_server. */
 100         struct timeval server_stream_start;
 101         /** The average time deviation between para_server and para_audiod. */
 102         struct timeval sa_time_diff;
 103         /** Whether client time is ahead of server time. */
 104         int sa_time_diff_sign;
 105         /** The 'P' and the 'N' flags as announced by para_server. */
 106         enum vss_status_flags vss_status;
 107         /** Number of times the clock difference is to be checked. */
 108         unsigned clock_diff_count;
 109         /** When to start the next check for clock difference. */
 110         struct timeval clock_diff_barrier;
 111         /** Number of the audio format as announced by para_server. */
 112         int current_audio_format_num;
 113         /* The status task btrn is the child of the client task. */
 114         struct btr_node *btrn;
 115 };
 116
 117 /** The array of status items sent by para_server. */
 118 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 119
 120 /**
 121  * the current mode of operation of which can be changed by the on/off/cycle
 122  * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
 123  */
 124 int audiod_status = AUDIOD_ON;
 125
 126 /**
 127  * the gengetopt args_info struct that holds information on all command line
 128  * arguments
 129  */
 130 struct audiod_args_info conf;
 131
 132 static char *socket_name;
 133 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 134
 135 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
 136
 137 static struct status_task status_task_struct;
 138
 139 /**
 140  * the task that calls the status command of para_server
 141  *
 142  * \sa struct status_task
 143  */
 144 static struct status_task *stat_task = &status_task_struct;
 145
 146 /**
 147  * the task for handling audiod commands
 148  *
 149  * \sa struct task, struct sched
 150  */
 151 struct command_task {
 152         /** the local listening socket */
 153         int fd;
 154         /** the associated task structure */
 155         struct task task;
 156 };
 157
 158 /** iterate over all supported audio formats */
 159 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 160
 161 /**
 162  * Get the audio format number.
 163  *
 164  * \param name The name of the audio format.
 165  *
 166  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
 167  * \a name is not a supported audio format.
 168  */
 169 static int get_audio_format_num(const char *name)
 170 {
 171         int i;
 172
 173         while (para_isspace(*name))
 174                 name++;
 175         FOR_EACH_AUDIO_FORMAT(i)
 176                 if (!strcmp(name, audio_formats[i]))
 177                         return i;
 178         return -E_UNSUPPORTED_AUDIO_FORMAT;
 179 }
 180
 181 /**
 182  * Compute the play time based on information of the given slot.
 183  *
 184  * \param slot_num The slot number (negative means: no slot).
 185  *
 186  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 187  * from the status items received from para_server and the start time of the
 188  * (first) writer of the given slot.
 189  *
 190  * It has to to take into account that probably the stream was not started at
 191  * the beginning of the file, that the clock between the server and the client
 192  * host may differ and that playback of the stream was delayed, e.g. because
 193  * the prebuffer filter is used in the filter configuration of the given slot.
 194  *
 195  * If no writer is active in the given slot, or \a slot_num is negative
 196  * (indicating that para_audiod runs in standby mode), an approximation based
 197  * only on the status items is computed and the returned string is prefixed
 198  * with "~".
 199  *
 200  * \return A string that must be freed by the caller.
 201  */
 202 char *get_time_string(int slot_num)
 203 {
 204         int ret, seconds = 0, length;
 205         struct timeval *tmp, sum, sss, /* server stream start */
 206                 rstime, /* receiver start time */
 207                 wstime, /* writer start time */
 208                 wtime, /* now - writer start */
 209                 rskip; /* receiver start - sss */
 210         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 211         char *msg;
 212
 213         if (audiod_status == AUDIOD_OFF)
 214                 goto empty;
 215         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 216                 if (stat_task->length_seconds) /* paused */
 217                         return NULL;
 218                 goto empty; /* stopped */
 219         }
 220         if (audiod_status == AUDIOD_ON && !s)
 221                 goto empty;
 222         /*
 223          * Valid status items and playing, set length and tmp to the stream
 224          * start. We use the slot info and fall back to the info from current
 225          * status items if no slot info is available.
 226          */
 227         length = stat_task->length_seconds;
 228         tmp = &stat_task->server_stream_start;
 229         if (s && s->wns) { /* writer active in this slot */
 230                 btr_get_node_start(s->wns[0].btrn, &wstime);
 231                 if (wstime.tv_sec != 0) { /* writer wrote something */
 232                         if (s->server_stream_start.tv_sec == 0) {
 233                                 /* copy status info to slot */
 234                                 s->server_stream_start = stat_task->server_stream_start;
 235                                 s->offset_seconds = stat_task->offset_seconds;
 236                                 s->seconds_total = stat_task->length_seconds;
 237                         }
 238                         length = s->seconds_total;
 239                         tmp = &s->server_stream_start;
 240                 }
 241         }
 242         if (stat_task->sa_time_diff_sign > 0)
 243                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 244         else
 245                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 246         if (!s || !s->wns) {
 247                 struct timeval diff;
 248                 tv_diff(now, &sss, &diff);
 249                 seconds = diff.tv_sec + stat_task->offset_seconds;
 250                 goto out;
 251         }
 252         tv_diff(now, &wstime, &wtime);
 253         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 254         seconds = s->offset_seconds;
 255         btr_get_node_start(s->receiver_node->btrn, &rstime);
 256         ret = tv_diff(&rstime, &sss, &rskip);
 257         if (ret > 0) { /* audiod was started in the middle of the stream */
 258                 tv_add(&wtime, &rskip, &sum);
 259                 seconds += sum.tv_sec;
 260         } else
 261                 seconds += wtime.tv_sec;
 262 out:
 263         seconds = PARA_MIN(seconds, length);
 264         seconds = PARA_MAX(seconds, 0);
 265         msg = make_message(
 266                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 267                 s? "" : "~",
 268                 seconds / 60,
 269                 seconds % 60,
 270                 (length - seconds) / 60,
 271                 (length - seconds) % 60,
 272                 length? (seconds * 100 + length / 2) / length : 0,
 273                 length / 60,
 274                 length % 60
 275         );
 276         PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 277         return msg;
 278 empty:
 279         return para_strdup(NULL);
 280 }
 281
 282 static int want_colors(void)
 283 {
 284         if (conf.color_arg == color_arg_no)
 285                 return 0;
 286         if (conf.color_arg == color_arg_yes)
 287                 return 1;
 288         if (conf.logfile_given)
 289                 return 0;
 290         return isatty(STDERR_FILENO);
 291 }
 292
 293 static void parse_config_or_die(void)
 294 {
 295         int ret;
 296         char *config_file;
 297         struct audiod_cmdline_parser_params params = {
 298                 .override = 0,
 299                 .initialize = 0,
 300                 .check_required = 1,
 301                 .check_ambiguity = 0,
 302                 .print_errors = 1
 303         };
 304
 305         if (conf.config_file_given)
 306                 config_file = para_strdup(conf.config_file_arg);
 307         else {
 308                 char *home = para_homedir();
 309                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 310                 free(home);
 311         }
 312         ret = file_exists(config_file);
 313         if (conf.config_file_given && !ret) {
 314                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 315                 goto err;
 316         }
 317         if (ret)
 318                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 319         free(config_file);
 320         daemon_set_loglevel(conf.loglevel_arg);
 321         return;
 322 err:
 323         free(config_file);
 324         exit(EXIT_FAILURE);
 325 }
 326
 327 static void setup_signal_handling(void)
 328 {
 329         sig_task->fd = para_signal_init();
 330         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 331         para_install_sighandler(SIGINT);
 332         para_install_sighandler(SIGTERM);
 333         para_install_sighandler(SIGHUP);
 334         para_sigaction(SIGPIPE, SIG_IGN);
 335 }
 336
 337 static void clear_slot(int slot_num)
 338 {
 339         struct slot_info *s = &slot[slot_num];
 340
 341         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 342         memset(s, 0, sizeof(struct slot_info));
 343         s->format = -1;
 344 }
 345
 346 static void close_receiver(int slot_num)
 347 {
 348         struct slot_info *s = &slot[slot_num];
 349         struct audio_format_info *a;
 350
 351         if (s->format < 0 || !s->receiver_node)
 352                 return;
 353         a = &afi[s->format];
 354         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 355                 audio_formats[s->format], slot_num);
 356         a->receiver->close(s->receiver_node);
 357         btr_free_node(s->receiver_node->btrn);
 358         free(s->receiver_node);
 359         s->receiver_node = NULL;
 360         tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
 361                 &a->restart_barrier);
 362 }
 363
 364 static void writer_cleanup(struct writer_node *wn)
 365 {
 366         struct writer *w;
 367
 368         if (!wn)
 369                 return;
 370         w = writers + wn->writer_num;
 371         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 372         w->close(wn);
 373         btr_free_node(wn->btrn);
 374 }
 375
 376 static void close_writers(struct slot_info *s)
 377 {
 378         struct audio_format_info *a;
 379         int i;
 380
 381         if (s->format < 0)
 382                 return;
 383         assert(s->wns);
 384         a = afi + s->format;
 385         if (a->num_writers == 0)
 386                 writer_cleanup(s->wns);
 387         else {
 388                 for (i = 0; i < a->num_writers; i++)
 389                         writer_cleanup(s->wns + i);
 390         }
 391         free(s->wns);
 392         s->wns = NULL;
 393 }
 394
 395 static void close_filters(struct slot_info *s)
 396 {
 397         int i;
 398         struct audio_format_info *a = afi + s->format;
 399         if (a->num_filters == 0)
 400                 return;
 401         for (i = 0; i < a->num_filters; i++) {
 402                 struct filter_node *fn = s->fns + i;
 403                 struct filter *f;
 404
 405                 if (!fn)
 406                         continue;
 407                 f = filters + fn->filter_num;
 408                 if (f->close)
 409                         f->close(fn);
 410                 btr_free_node(fn->btrn);
 411         }
 412         free(s->fns);
 413         s->fns = NULL;
 414 }
 415
 416 /*
 417  * Whenever a task commits suicide by returning from post_select with t->error
 418  * < 0, it also removes its btr node. We do exactly that to kill a running
 419  * task. Note that the scheduler checks t->error also _before_ each pre/post
 420  * select call, so the victim will never be scheduled again.
 421  */
 422 static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
 423 {
 424         if (t->error < 0)
 425                 return;
 426         t->error = error;
 427         btr_remove_node(btrn);
 428 }
 429
 430 static void kill_all_decoders(int error)
 431 {
 432         int i, j;
 433
 434         FOR_EACH_SLOT(i) {
 435                 struct slot_info *s = &slot[i];
 436                 struct audio_format_info *a;
 437                 if (s->format < 0)
 438                         continue;
 439                 a = afi + s->format;
 440                 if (s->wns)
 441                         for (j = 0; j < a->num_writers; j++)
 442                                 kill_btrn(s->wns[j].btrn, &s->wns[j].task, error);
 443                 if (s->fns)
 444                         for (j = 0; j < a->num_writers; j++)
 445                                 kill_btrn(s->fns[j].btrn, &s->wns[j].task, error);
 446                 if (s->receiver_node)
 447                         kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
 448                                 error);
 449         }
 450 }
 451
 452 static int get_empty_slot(void)
 453 {
 454         int i;
 455         struct slot_info *s;
 456
 457         FOR_EACH_SLOT(i) {
 458                 s = &slot[i];
 459                 if (s->format < 0) {
 460                         clear_slot(i);
 461                         return i;
 462                 }
 463                 if (s->wns || s->receiver_node || s->fns)
 464                         continue;
 465                 clear_slot(i);
 466                 return i;
 467         }
 468         return -E_NO_MORE_SLOTS;
 469 }
 470
 471 static void open_filters(struct slot_info *s)
 472 {
 473         struct audio_format_info *a = afi + s->format;
 474         struct filter_node *fn;
 475         int nf = a->num_filters;
 476         struct btr_node *parent;
 477         int i;
 478
 479         if (nf == 0)
 480                 return;
 481         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 482         assert(s->fns == NULL);
 483         s->fns = para_calloc(nf * sizeof(struct filter_node));
 484         parent = s->receiver_node->btrn;
 485         for (i = 0; i < nf; i++) {
 486                 struct filter *f = filters + a->filter_nums[i];
 487                 fn = s->fns + i;
 488                 fn->filter_num = a->filter_nums[i];
 489                 fn->conf = a->filter_conf[i];
 490                 fn->task.pre_select = f->pre_select;
 491                 fn->task.post_select = f->post_select;
 492
 493                 fn->btrn = btr_new_node(&(struct btr_node_description)
 494                         EMBRACE(.name = f->name, .parent = parent,
 495                                 .handler = f->execute, .context = fn));
 496
 497                 f->open(fn);
 498                 register_task(&fn->task);
 499                 parent = fn->btrn;
 500                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 501                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 502                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 503         }
 504 }
 505
 506 static void open_writers(struct slot_info *s)
 507 {
 508         int i;
 509         struct audio_format_info *a = afi + s->format;
 510         struct writer_node *wn;
 511         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 512
 513         assert(s->wns == NULL);
 514         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 515                 * sizeof(struct writer_node));
 516         if (a->num_writers == 0)
 517                 setup_writer_node(NULL, parent, s->wns);
 518         else {
 519                 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 520                 for (i = 0; i < a->num_writers; i++) {
 521                         wn = s->wns + i;
 522                         wn->conf = a->writer_conf[i];
 523                         wn->writer_num = a->writer_nums[i];
 524                         register_writer_node(wn, parent);
 525                 }
 526         }
 527 }
 528
 529 /* returns slot num on success */
 530 static int open_receiver(int format)
 531 {
 532         struct audio_format_info *a = &afi[format];
 533         struct slot_info *s;
 534         int ret, slot_num;
 535         struct receiver *r = a->receiver;
 536         struct receiver_node *rn;
 537
 538         tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
 539         ret = get_empty_slot();
 540         if (ret < 0)
 541                 return ret;
 542         slot_num = ret;
 543         rn = para_calloc(sizeof(*rn));
 544         rn->receiver = r;
 545         rn->conf = a->receiver_conf;
 546         rn->btrn = btr_new_node(&(struct btr_node_description)
 547                 EMBRACE(.name = r->name, .context = rn));
 548         ret = r->open(rn);
 549         if (ret < 0) {
 550                 btr_free_node(rn->btrn);
 551                 free(rn);
 552                 return ret;
 553         }
 554         s = &slot[slot_num];
 555         s->format = format;
 556         s->receiver_node = rn;
 557         PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
 558                 audio_formats[format], r->name, slot_num);
 559         rn->task.pre_select = r->pre_select;
 560         rn->task.post_select = r->post_select;
 561         sprintf(rn->task.status, "%s receiver node", r->name);
 562         register_task(&rn->task);
 563         return slot_num;
 564 }
 565
 566 static bool receiver_running(void)
 567 {
 568         int i;
 569         long unsigned ss1 = stat_task->server_stream_start.tv_sec;
 570
 571         FOR_EACH_SLOT(i) {
 572                 struct slot_info *s = &slot[i];
 573                 long unsigned ss2 = s->server_stream_start.tv_sec;
 574
 575                 if (!s->receiver_node)
 576                         continue;
 577                 if (s->receiver_node->task.error >= 0)
 578                         return true;
 579                 if (ss1 == ss2)
 580                         return true;
 581         }
 582         return false;
 583 }
 584
 585 /**
 586  * Return the root node of the current buffer tree.
 587  *
 588  * This is only used for stream grabbing.
 589  *
 590  * \return \p NULL if no slot is currently active. If more than one buffer tree
 591  * exists, the node corresponding to the most recently started receiver is
 592  * returned.
 593  */
 594 struct btr_node *audiod_get_btr_root(void)
 595 {
 596         int i, newest_slot = -1;
 597         struct timeval newest_rstime = {0, 0};
 598
 599         FOR_EACH_SLOT(i) {
 600                 struct slot_info *s = &slot[i];
 601                 struct timeval rstime;
 602                 if (!s->receiver_node)
 603                         continue;
 604                 if (s->receiver_node->task.error < 0)
 605                         continue;
 606                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 607                 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
 608                         continue;
 609                 newest_rstime = rstime;
 610                 newest_slot = i;
 611         }
 612         if (newest_slot == -1)
 613                 return NULL;
 614         return slot[newest_slot].receiver_node->btrn;
 615 }
 616
 617 /* whether a new instance of a decoder should be started. */
 618 static bool must_start_decoder(void)
 619 {
 620         int cafn = stat_task->current_audio_format_num;
 621         unsigned vs = stat_task->vss_status;
 622
 623         if (audiod_status != AUDIOD_ON)
 624                 return false;
 625         if (cafn < 0)
 626                 return false;
 627         if (!stat_task->ct)
 628                 return false;
 629         if (vs & VSS_STATUS_FLAG_NEXT)
 630                 return false;
 631         if (!(vs & VSS_STATUS_FLAG_PLAYING))
 632                 return false;
 633         if (receiver_running())
 634                 return false;
 635         if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
 636                 return false;
 637         return true;
 638 }
 639
 640 static unsigned compute_time_diff(const struct timeval *status_time)
 641 {
 642         struct timeval tmp, diff;
 643         static unsigned count;
 644         int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
 645         const struct timeval max_deviation = {0, 500 * 1000};
 646         const int time_smooth = 5;
 647
 648         if (!status_time)
 649                 return count;
 650         sign = tv_diff(status_time, now, &diff);
 651 //              PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
 652 //                      sign, sa_time_diff_sign);
 653         if (!count) {
 654                 sa_time_diff_sign = sign;
 655                 stat_task->sa_time_diff = diff;
 656                 count++;
 657                 goto out;
 658         }
 659         if (count > 5) {
 660                 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
 661                 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
 662                         PARA_WARNING_LOG("time diff jump: %lims\n",
 663                                 s * tv2ms(&tmp));
 664         }
 665         count++;
 666         sa_time_diff_sign = tv_convex_combination(
 667                 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
 668                 count > 10? sign : sign * time_smooth, &diff,
 669                 &tmp);
 670         stat_task->sa_time_diff = tmp;
 671         PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
 672                 sign < 0? "-" : "+",
 673                 tv2ms(&diff),
 674                 sa_time_diff_sign < 0? "-" : "+",
 675                 tv2ms(&stat_task->sa_time_diff)
 676         );
 677 out:
 678         stat_task->sa_time_diff_sign = sa_time_diff_sign;
 679         return count;
 680 }
 681
 682 static int update_item(int itemnum, char *buf)
 683 {
 684         long unsigned sec, usec;
 685
 686         if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
 687                 return 1;
 688         free(stat_item_values[itemnum]);
 689         stat_item_values[itemnum] = para_strdup(buf);
 690         stat_client_write_item(itemnum);
 691         switch (itemnum) {
 692         case SI_STATUS_FLAGS:
 693                 stat_task->vss_status = 0;
 694                 if (strchr(buf, 'N'))
 695                         stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
 696                 if (strchr(buf, 'P'))
 697                         stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
 698                 break;
 699         case SI_OFFSET:
 700                 stat_task->offset_seconds = atoi(buf);
 701                 break;
 702         case SI_SECONDS_TOTAL:
 703                 stat_task->length_seconds = atoi(buf);
 704                 break;
 705         case SI_STREAM_START:
 706                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 707                         stat_task->server_stream_start.tv_sec = sec;
 708                         stat_task->server_stream_start.tv_usec = usec;
 709                 }
 710                 break;
 711         case SI_CURRENT_TIME:
 712                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 713                         struct timeval tv = {sec, usec};
 714                         compute_time_diff(&tv);
 715                 }
 716                 break;
 717         case SI_FORMAT:
 718                 stat_task->current_audio_format_num
 719                         = get_audio_format_num(buf);
 720         }
 721         return 1;
 722 }
 723
 724 static int parse_stream_command(const char *txt, char **cmd)
 725 {
 726         char *p = strchr(txt, ':');
 727         int i;
 728
 729         if (!p)
 730                 return -E_MISSING_COLON;
 731         p++;
 732         FOR_EACH_AUDIO_FORMAT(i) {
 733                 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
 734                         continue;
 735                 *cmd = p;
 736                 return i;
 737         }
 738         return -E_UNSUPPORTED_AUDIO_FORMAT;
 739 }
 740
 741 static int add_filter(int format, char *cmdline)
 742 {
 743         struct audio_format_info *a = &afi[format];
 744         int filter_num, nf = a->num_filters;
 745
 746         filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
 747         if (filter_num < 0)
 748                 return filter_num;
 749         a->filter_nums[nf] = filter_num;
 750         a->num_filters++;
 751         PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
 752                 filters[filter_num].name);
 753         return filter_num;
 754 }
 755
 756 static int parse_writer_args(void)
 757 {
 758         int i, ret, nw;
 759         char *cmd;
 760         struct audio_format_info *a;
 761
 762         nw = PARA_MAX(1U, conf.writer_given);
 763         PARA_INFO_LOG("maximal number of writers: %d\n", nw);
 764         FOR_EACH_AUDIO_FORMAT(i) {
 765                 a = &afi[i];
 766                 a->writer_conf = para_malloc(nw * sizeof(void *));
 767                 a->writer_nums = para_malloc(nw * sizeof(int));
 768                 a->num_writers = 0;
 769         }
 770         for (i = 0; i < conf.writer_given; i++) {
 771                 void *wconf;
 772                 int writer_num;
 773                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 774                 if (ret < 0)
 775                         goto out;
 776                 a = &afi[ret];
 777                 nw = a->num_writers;
 778                 wconf = check_writer_arg(cmd, &writer_num);
 779                 if (!wconf) {
 780                         ret = writer_num;
 781                         goto out;
 782                 }
 783                 a->writer_nums[nw] = writer_num;
 784                 a->writer_conf[nw] = wconf;
 785                 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
 786                         nw, writer_names[writer_num]);
 787                 a->num_writers++;
 788         }
 789         ret = 1;
 790 out:
 791         return ret;
 792 }
 793
 794 static int parse_receiver_args(void)
 795 {
 796         int i, ret, receiver_num;
 797         char *cmd = NULL;
 798         struct audio_format_info *a;
 799
 800         for (i = conf.receiver_given - 1; i >= 0; i--) {
 801                 char *arg = conf.receiver_arg[i];
 802                 char *recv_arg = strchr(arg, ':');
 803                 ret = -E_MISSING_COLON;
 804                 if (!recv_arg)
 805                         goto out;
 806                 *recv_arg = '\0';
 807                 recv_arg++;
 808                 ret = get_audio_format_num(arg);
 809                 if (ret < 0)
 810                         goto out;
 811                 /*
 812                  * If multiple receivers are given for this audio format, the
 813                  * last one wins and we have to free the previous receiver
 814                  * config here. Since we are iterating backwards, the winning
 815                  * receiver arg is in fact the first one given.
 816                  */
 817                 if (afi[ret].receiver_conf)
 818                         afi[ret].receiver->free_config(afi[ret].receiver_conf);
 819                 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
 820                 if (!afi[ret].receiver_conf) {
 821                         ret = -E_RECV_SYNTAX;
 822                         goto out;
 823                 }
 824                 afi[ret].receiver = &receivers[receiver_num];
 825         }
 826         /*
 827          * Use the first available receiver with no arguments for those audio
 828          * formats for which no receiver was specified.
 829          */
 830         cmd = para_strdup(receivers[0].name);
 831         FOR_EACH_AUDIO_FORMAT(i) {
 832                 a = &afi[i];
 833                 if (a->receiver_conf)
 834                         continue;
 835                 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
 836                 if (!a->receiver_conf)
 837                         return -E_RECV_SYNTAX;
 838                 a->receiver = &receivers[receiver_num];
 839         }
 840         ret = 1;
 841 out:
 842         free(cmd);
 843         return ret;
 844 }
 845
 846 static int init_default_filters(void)
 847 {
 848         int i, ret = 1;
 849
 850         FOR_EACH_AUDIO_FORMAT(i) {
 851                 struct audio_format_info *a = &afi[i];
 852                 char *tmp;
 853                 int j;
 854
 855                 if (a->num_filters)
 856                         continue; /* no default -- nothing to to */
 857                 /*
 858                  * If udp is used to receive this audiod format, add fecdec as
 859                  * the first filter.
 860                  */
 861                 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
 862                                 strcmp(afi[i].receiver->name, "dccp") == 0) {
 863                         tmp = para_strdup("fecdec");
 864                         add_filter(i, tmp);
 865                         free(tmp);
 866                         if (ret < 0)
 867                                 goto out;
 868                 }
 869                 /* add "dec" to audio format name */
 870                 tmp = make_message("%sdec", audio_formats[i]);
 871                 for (j = 0; filters[j].name; j++)
 872                         if (!strcmp(tmp, filters[j].name))
 873                                 break;
 874                 free(tmp);
 875                 ret = -E_UNSUPPORTED_FILTER;
 876                 if (!filters[j].name)
 877                         goto out;
 878                 tmp = para_strdup(filters[j].name);
 879                 ret = add_filter(i, tmp);
 880                 free(tmp);
 881                 if (ret < 0)
 882                         goto out;
 883                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 884                         filters[j].name);
 885         }
 886 out:
 887         return ret;
 888 }
 889
 890 static int parse_filter_args(void)
 891 {
 892         int i, ret, nf;
 893
 894         nf = PARA_MAX(2U, conf.filter_given);
 895         PARA_INFO_LOG("maximal number of filters: %d\n", nf);
 896         FOR_EACH_AUDIO_FORMAT(i) {
 897                 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
 898                 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
 899         }
 900         if (!conf.no_default_filters_given)
 901                 return init_default_filters();
 902         for (i = 0; i < conf.filter_given; i++) {
 903                 char *arg = conf.filter_arg[i];
 904                 char *filter_name = strchr(arg, ':');
 905                 ret = -E_MISSING_COLON;
 906                 if (!filter_name)
 907                         goto out;
 908                 *filter_name = '\0';
 909                 filter_name++;
 910                 ret = get_audio_format_num(arg);
 911                 if (ret < 0)
 912                         goto out;
 913                 ret = add_filter(ret, filter_name);
 914                 if (ret < 0)
 915                         goto out;
 916         }
 917         ret = init_default_filters(); /* use default values for the rest */
 918 out:
 919         return ret;
 920 }
 921
 922 static int parse_stream_args(void)
 923 {
 924         int ret;
 925
 926         ret = parse_receiver_args();
 927         if (ret < 0)
 928                 return ret;
 929         ret = parse_filter_args();
 930         if (ret < 0)
 931                 return ret;
 932         ret = parse_writer_args();
 933         if (ret < 0)
 934                 return ret;
 935         return 1;
 936 }
 937
 938 /* does not unlink socket on errors */
 939 static int audiod_get_socket(void)
 940 {
 941         struct sockaddr_un unix_addr;
 942         int ret, fd;
 943
 944         if (conf.socket_given)
 945                 socket_name = para_strdup(conf.socket_arg);
 946         else {
 947                 char *hn = para_hostname();
 948                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 949                         hn);
 950                 free(hn);
 951         }
 952         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 953         if (conf.force_given)
 954                 unlink(socket_name);
 955         ret = create_local_socket(socket_name, &unix_addr,
 956                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 957         if (ret < 0)
 958                 goto err;
 959         fd = ret;
 960         if (listen(fd , 5) < 0) {
 961                 ret = -ERRNO_TO_PARA_ERROR(errno);
 962                 goto err;
 963         }
 964         ret = mark_fd_nonblocking(fd);
 965         if (ret < 0)
 966                 goto err;
 967         return fd;
 968 err:
 969         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 970         exit(EXIT_FAILURE);
 971 }
 972
 973 static void signal_pre_select(struct sched *s, struct task *t)
 974 {
 975         struct signal_task *st = container_of(t, struct signal_task, task);
 976         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 977 }
 978
 979 static void signal_post_select(struct sched *s, __a_unused struct task *t)
 980 {
 981         int signum;
 982
 983         signum = para_next_signal(&s->rfds);
 984         switch (signum) {
 985         case SIGINT:
 986         case SIGTERM:
 987         case SIGHUP:
 988                 PARA_EMERG_LOG("terminating on signal %d\n", signum);
 989                 clean_exit(EXIT_FAILURE, "caught deadly signal");
 990         }
 991 }
 992
 993 static void signal_setup_default(struct signal_task *st)
 994 {
 995         st->task.pre_select = signal_pre_select;
 996         st->task.post_select = signal_post_select;
 997         sprintf(st->task.status, "signal task");
 998 }
 999
1000 static void command_pre_select(struct sched *s, struct task *t)
1001 {
1002         struct command_task *ct = container_of(t, struct command_task, task);
1003         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1004 }
1005
1006 static void command_post_select(struct sched *s, struct task *t)
1007 {
1008         int ret;
1009         struct command_task *ct = container_of(t, struct command_task, task);
1010         static struct timeval last_status_dump;
1011         struct timeval tmp, delay = {0, 500 * 1000};
1012
1013         tv_add(&last_status_dump, &delay, &tmp);
1014         if (tv_diff(&tmp, now, NULL) < 0) {
1015                 audiod_status_dump();
1016                 last_status_dump = *now;
1017         }
1018
1019         ret = handle_connect(ct->fd, &s->rfds);
1020         if (ret < 0)
1021                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1022         audiod_status_dump();
1023 }
1024
1025 static void init_command_task(struct command_task *ct)
1026 {
1027         ct->task.pre_select = command_pre_select;
1028         ct->task.post_select = command_post_select;
1029         ct->task.error = 0;
1030         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1031         sprintf(ct->task.status, "command task");
1032 }
1033
1034 static void close_stat_pipe(void)
1035 {
1036         if (!stat_task->ct)
1037                 return;
1038         btr_free_node(stat_task->ct->btrn);
1039         client_close(stat_task->ct);
1040         stat_task->ct = NULL;
1041         clear_and_dump_items();
1042         stat_task->length_seconds = 0;
1043         stat_task->offset_seconds = 0;
1044         stat_task->vss_status = 0;
1045         stat_task->current_audio_format_num = -1;
1046         audiod_status_dump();
1047 }
1048
1049 /**
1050  * close the connection to para_server and exit
1051  *
1052  * \param status the exit status which is passed to exit(3)
1053  * \param msg the log message
1054  *
1055  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1056  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1057  * EXIT_FAILURE.
1058  *
1059  * \sa exit(3)
1060  */
1061 void __noreturn clean_exit(int status, const char *msg)
1062 {
1063         PARA_EMERG_LOG("%s\n", msg);
1064         if (socket_name)
1065                 unlink(socket_name);
1066         close_stat_pipe();
1067         exit(status);
1068 }
1069
1070 /* avoid busy loop if server is down */
1071 static void set_stat_task_restart_barrier(unsigned seconds)
1072 {
1073         struct timeval delay = {seconds, 0};
1074         tv_add(now, &delay, &stat_task->restart_barrier);
1075 }
1076
1077 static void try_to_close_slot(int slot_num)
1078 {
1079         struct slot_info *s = &slot[slot_num];
1080         struct audio_format_info *a = afi + s->format;
1081         int i;
1082
1083         if (s->format < 0)
1084                 return;
1085         if (s->receiver_node && s->receiver_node->task.error >= 0)
1086                 return;
1087         for (i = 0; i < a->num_filters; i++)
1088                 if (s->fns && s->fns[i].task.error >= 0)
1089                         return;
1090         if (a->num_writers > 0) {
1091                 for (i = 0; i < a->num_writers; i++)
1092                         if (s->wns && s->wns[i].task.error >= 0)
1093                                 return;
1094         } else {
1095                 if (s->wns && s->wns[0].task.error >= 0)
1096                         return;
1097         }
1098         PARA_INFO_LOG("closing slot %d\n", slot_num);
1099         close_writers(s);
1100         close_filters(s);
1101         close_receiver(slot_num);
1102         clear_slot(slot_num);
1103 }
1104
1105 /*
1106  * Check if any receivers/filters/writers need to be started and do so if
1107  * necessary.
1108  */
1109 static void start_stop_decoders(void)
1110 {
1111         int i, ret;
1112         struct slot_info *sl;
1113         struct audio_format_info *a;
1114
1115         FOR_EACH_SLOT(i)
1116                 try_to_close_slot(i);
1117         if (audiod_status != AUDIOD_ON ||
1118                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1119                 return kill_all_decoders(-E_NOT_PLAYING);
1120         if (!must_start_decoder())
1121                 return;
1122         ret = open_receiver(stat_task->current_audio_format_num);
1123         if (ret < 0) {
1124                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1125                 return;
1126         }
1127         sl = slot + ret;
1128         a = afi + sl->format;
1129         if (a->num_filters)
1130                 open_filters(sl);
1131         open_writers(sl);
1132         activate_grab_clients();
1133         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1134 }
1135
1136 static void status_pre_select(struct sched *s, struct task *t)
1137 {
1138         struct status_task *st = container_of(t, struct status_task, task);
1139         int ret, cafn = stat_task->current_audio_format_num;
1140
1141         if (must_start_decoder())
1142                 goto min_delay;
1143         ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
1144         if (ret > 0)
1145                 goto min_delay;
1146         if (st->ct && audiod_status == AUDIOD_OFF)
1147                 goto min_delay;
1148         if (!st->ct && audiod_status != AUDIOD_OFF)
1149                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1150         if (cafn >= 0)
1151                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1152         /*
1153          * If para_server is playing we'd like to have a smooth time display
1154          * even if we are running in standby mode. So we request a timeout that
1155          * expires at the next full second.
1156          */
1157         if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1158                 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1159         return;
1160 min_delay:
1161         sched_min_delay(s);
1162 }
1163
1164 /* restart the client task if necessary */
1165 static void status_post_select(__a_unused struct sched *s, struct task *t)
1166 {
1167         struct status_task *st = container_of(t, struct status_task, task);
1168
1169         if (audiod_status == AUDIOD_OFF) {
1170                 if (!st->ct)
1171                         goto out;
1172                 if (st->ct->task.error >= 0) {
1173                         kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
1174                         goto out;
1175                 }
1176                 if (st->ct->task.error >= 0)
1177                         goto out;
1178                 close_stat_pipe();
1179                 st->clock_diff_count = conf.clock_diff_count_arg;
1180                 goto out;
1181         }
1182         if (st->ct) {
1183                 char *buf;
1184                 size_t sz;
1185                 int ret;
1186                 if (st->ct->task.error < 0) {
1187                         if (st->ct->task.error >= 0)
1188                                 goto out;
1189                         close_stat_pipe();
1190                         goto out;
1191                 }
1192                 if (st->ct->status != CL_RECEIVING)
1193                         goto out;
1194                 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1195                 if (ret <= 0) {
1196                         struct timeval diff;
1197                         tv_diff(now, &st->last_status_read, &diff);
1198                         if (diff.tv_sec > 61)
1199                                 kill_btrn(st->ct->btrn, &st->ct->task,
1200                                         -E_STATUS_TIMEOUT);
1201                         goto out;
1202                 }
1203                 btr_merge(st->btrn, st->min_iqs);
1204                 sz = btr_next_buffer(st->btrn, &buf);
1205                 ret = for_each_stat_item(buf, sz, update_item);
1206                 if (ret < 0) {
1207                         kill_btrn(st->ct->btrn, &st->ct->task, ret);
1208                         goto out;
1209                 }
1210                 if (sz != ret) {
1211                         btr_consume(st->btrn, sz - ret);
1212                         st->last_status_read = *now;
1213                         st->min_iqs = 0;
1214                 } else /* current status item crosses buffers */
1215                         st->min_iqs = sz + 1;
1216                 goto out;
1217         }
1218         btr_drain(st->btrn);
1219         st->current_audio_format_num = -1;
1220         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1221                 goto out;
1222         if (st->clock_diff_count) { /* get status only one time */
1223                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1224                 int argc = 5;
1225                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1226                 st->clock_diff_count--;
1227                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1228                 set_stat_task_restart_barrier(2);
1229
1230         } else {
1231                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1232                 int argc = 4;
1233                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1234                 set_stat_task_restart_barrier(5);
1235         }
1236         free(stat_item_values[SI_BASENAME]);
1237         stat_item_values[SI_BASENAME] = para_strdup(
1238                 "no connection to para_server");
1239         stat_client_write_item(SI_BASENAME);
1240         st->last_status_read = *now;
1241 out:
1242         start_stop_decoders();
1243 }
1244
1245 static void init_status_task(struct status_task *st)
1246 {
1247         memset(st, 0, sizeof(struct status_task));
1248         st->task.pre_select = status_pre_select;
1249         st->task.post_select = status_post_select;
1250         st->sa_time_diff_sign = 1;
1251         st->clock_diff_count = conf.clock_diff_count_arg;
1252         st->current_audio_format_num = -1;
1253         sprintf(st->task.status, "stat");
1254         st->btrn = btr_new_node(&(struct btr_node_description)
1255                 EMBRACE(.name = "stat"));
1256 }
1257
1258 static void set_initial_status(void)
1259 {
1260         audiod_status = AUDIOD_ON;
1261         if (!conf.mode_given)
1262                 return;
1263         if (!strcmp(conf.mode_arg, "sb")) {
1264                 audiod_status = AUDIOD_STANDBY;
1265                 return;
1266         }
1267         if (!strcmp(conf.mode_arg, "off")) {
1268                 audiod_status = AUDIOD_OFF;
1269                 return;
1270         }
1271         if (strcmp(conf.mode_arg, "on"))
1272                 PARA_WARNING_LOG("invalid mode\n");
1273 }
1274
1275 __noreturn static void print_help_and_die(void)
1276 {
1277         int d = conf.detailed_help_given;
1278         const char **p = d? audiod_args_info_detailed_help
1279                 : audiod_args_info_help;
1280
1281         printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1282                 AUDIOD_CMDLINE_PARSER_VERSION);
1283         printf_or_die("%s\n\n", audiod_args_info_usage);
1284         for (; *p; p++)
1285                 printf_or_die("%s\n", *p);
1286         print_receiver_helps(d);
1287         print_filter_helps(d);
1288         print_writer_helps(d);
1289         exit(0);
1290 }
1291
1292 static void init_colors_or_die(void)
1293 {
1294         int i;
1295
1296         if (!want_colors())
1297                 return;
1298         daemon_set_default_log_colors();
1299         daemon_set_flag(DF_COLOR_LOG);
1300         for (i = 0; i < conf.log_color_given; i++)
1301                 daemon_set_log_color_or_die(conf.log_color_arg[i]);
1302 }
1303
1304 /**
1305  * the main function of para_audiod
1306  *
1307  * \param argc usual argument count
1308  * \param argv usual argument vector
1309  *
1310  * \return EXIT_SUCCESS or EXIT_FAILURE
1311  *
1312  * \sa para_audiod(1)
1313  * */
1314 int main(int argc, char *argv[])
1315 {
1316         int ret, i;
1317         static struct sched s;
1318         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1319         struct audiod_cmdline_parser_params params = {
1320                 .override = 0,
1321                 .initialize = 1,
1322                 .check_required = 0,
1323                 .check_ambiguity = 0,
1324                 .print_errors = 1
1325         };
1326
1327         valid_fd_012();
1328         if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1329                 exit(EXIT_FAILURE);
1330         HANDLE_VERSION_FLAG("audiod", conf);
1331         /* init receivers/filters/writers early to make help work */
1332         recv_init();
1333         filter_init();
1334         writer_init();
1335         if (conf.help_given || conf.detailed_help_given)
1336                 print_help_and_die();
1337         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1338         parse_config_or_die();
1339         init_colors_or_die();
1340         init_random_seed_or_die();
1341         daemon_set_flag(DF_LOG_TIME);
1342         daemon_set_flag(DF_LOG_HOSTNAME);
1343         daemon_set_flag(DF_LOG_LL);
1344         if (conf.log_timing_given)
1345                 daemon_set_flag(DF_LOG_TIMING);
1346         if (conf.logfile_given) {
1347                 daemon_set_logfile(conf.logfile_arg);
1348                 daemon_open_log_or_die();
1349         }
1350         ret = parse_stream_args();
1351         if (ret < 0) {
1352                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1353                 exit(EXIT_FAILURE);
1354         }
1355         log_welcome("para_audiod");
1356         server_uptime(UPTIME_SET);
1357         set_initial_status();
1358         FOR_EACH_SLOT(i)
1359                 clear_slot(i);
1360         setup_signal_handling();
1361         signal_setup_default(sig_task);
1362
1363         init_status_task(stat_task);
1364         init_command_task(cmd_task);
1365
1366         if (conf.daemon_given)
1367                 daemonize();
1368
1369         register_task(&sig_task->task);
1370         register_task(&cmd_task->task);
1371         register_task(&stat_task->task);
1372         s.default_timeout.tv_sec = 2;
1373         s.default_timeout.tv_usec = 999 * 1000;
1374         ret = schedule(&s);
1375
1376         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1377         return EXIT_FAILURE;
1378 }