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