audiod.c

   1 /*
   2  * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file audiod.c the paraslash's audio daemon */
   8 #include <regex.h>
   9 #include <sys/types.h>
  10 #include <dirent.h>
  11 #include <signal.h>
  12 #include <openssl/rc4.h>
  13 #include <stdbool.h>
  14
  15 #include "para.h"
  16 #include "error.h"
  17 #include "crypt.h"
  18 #include "audiod.cmdline.h"
  19 #include "list.h"
  20 #include "sched.h"
  21 #include "ggo.h"
  22 #include "recv.h"
  23 #include "buffer_tree.h"
  24 #include "filter.h"
  25 #include "grab_client.h"
  26 #include "client.cmdline.h"
  27 #include "client.h"
  28 #include "audiod.h"
  29 #include "net.h"
  30 #include "daemon.h"
  31 #include "string.h"
  32 #include "fd.h"
  33 #include "write.h"
  34 #include "write_common.h"
  35 #include "signal.h"
  36 #include "version.h"
  37
  38 /** define the array of error lists needed by para_audiod */
  39 INIT_AUDIOD_ERRLISTS;
  40 /** define the array containing all supported audio formats */
  41 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
  42
  43 /** Defines how audiod handles one supported audio format. */
  44 struct audio_format_info {
  45         /** pointer to the receiver for this audio format */
  46         struct receiver *receiver;
  47         /** the receiver configuration */
  48         void *receiver_conf;
  49         /** the number of filters that should be activated for this audio format */
  50         unsigned int num_filters;
  51         /** Array of filter numbers to be activated. */
  52         unsigned *filter_nums;
  53         /** Pointer to the array of filter configurations. */
  54         void **filter_conf;
  55         /** the number of filters that should be activated for this audio format */
  56         unsigned int num_writers;
  57         /** Array of writer numbers to be activated. */
  58         int *writer_nums;
  59         /** pointer to the array of writer configurations */
  60         void **writer_conf;
  61         /** do not start receiver/filters/writer before this time */
  62         struct timeval restart_barrier;
  63 };
  64
  65 /**
  66  * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
  67  * be associated with a receiver/filter/writer triple. This array holds all
  68  * information on the status of these slots.
  69  *
  70  * \sa struct slot_info
  71  * */
  72 struct slot_info slot[MAX_STREAM_SLOTS];
  73
  74 /** The vss status flags audiod is interested in. */
  75 enum vss_status_flags {
  76         /** Whether the 'N' flag is set. */
  77         VSS_STATUS_FLAG_NEXT = 1,
  78         /** The 'P' flag is set. */
  79         VSS_STATUS_FLAG_PLAYING = 2,
  80 };
  81
  82 /**
  83  * The task for obtaining para_server's status (para_client stat).
  84  *
  85  * \sa struct task, struct sched.
  86  */
  87 struct status_task {
  88         /** The associated task structure of audiod. */
  89         struct task task;
  90         /** Client data associated with the stat task. */
  91         struct client_task *ct;
  92         /** Do not restart client command until this time. */
  93         struct timeval restart_barrier;
  94         /** Last time we received status data from para_server. */
  95         struct timeval last_status_read;
  96         size_t min_iqs;
  97         /** The offset value announced by para_server. */
  98         int offset_seconds;
  99         /** The length of the current audio file as announced by para_server. */
 100         int length_seconds;
 101         /** The start of the current stream from the view of para_server. */
 102         struct timeval server_stream_start;
 103         /** The average time deviation between para_server and para_audiod. */
 104         struct timeval sa_time_diff;
 105         /** Whether client time is ahead of server time. */
 106         int sa_time_diff_sign;
 107         /** The 'P' and the 'N' flags as announced by para_server. */
 108         enum vss_status_flags vss_status;
 109         /** Number of times the clock difference is to be checked. */
 110         unsigned clock_diff_count;
 111         /** When to start the next check for clock difference. */
 112         struct timeval clock_diff_barrier;
 113         /** Number of the audio format as announced by para_server. */
 114         int current_audio_format_num;
 115         /* The status task btrn is the child of the client task. */
 116         struct btr_node *btrn;
 117 };
 118
 119 /** The array of status items sent by para_server. */
 120 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 121
 122 /**
 123  * the current mode of operation of which can be changed by the on/off/cycle
 124  * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
 125  */
 126 int audiod_status = AUDIOD_ON;
 127
 128 /**
 129  * the gengetopt args_info struct that holds information on all command line
 130  * arguments
 131  */
 132 struct audiod_args_info conf;
 133
 134 static char *socket_name;
 135 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 136
 137 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
 138
 139 static struct status_task status_task_struct;
 140
 141 /**
 142  * the task that calls the status command of para_server
 143  *
 144  * \sa struct status_task
 145  */
 146 static struct status_task *stat_task = &status_task_struct;
 147
 148 /**
 149  * the task for handling audiod commands
 150  *
 151  * \sa struct task, struct sched
 152  */
 153 struct command_task {
 154         /** the local listening socket */
 155         int fd;
 156         /** the associated task structure */
 157         struct task task;
 158 };
 159
 160 /** iterate over all supported audio formats */
 161 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 162
 163 /**
 164  * Get the audio format number.
 165  *
 166  * \param name The name of the audio format.
 167  *
 168  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
 169  * \a name is not a supported audio format.
 170  */
 171 static int get_audio_format_num(const char *name)
 172 {
 173         int i;
 174
 175         while (para_isspace(*name))
 176                 name++;
 177         FOR_EACH_AUDIO_FORMAT(i)
 178                 if (!strcmp(name, audio_formats[i]))
 179                         return i;
 180         return -E_UNSUPPORTED_AUDIO_FORMAT;
 181 }
 182
 183 /**
 184  * Compute the play time based on information of the given slot.
 185  *
 186  * \param slot_num The slot number (negative means: no slot).
 187  *
 188  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 189  * from the status items received from para_server and the start time of the
 190  * (first) writer of the given slot.
 191  *
 192  * It has to to take into account that probably the stream was not started at
 193  * the beginning of the file, that the clock between the server and the client
 194  * host may differ and that playback of the stream was delayed, e.g. because
 195  * the prebuffer filter is used in the filter configuration of the given slot.
 196  *
 197  * If no writer is active in the given slot, or \a slot_num is negative
 198  * (indicating that para_audiod runs in standby mode), an approximation based
 199  * only on the status items is computed and the returned string is prefixed
 200  * with "~".
 201  *
 202  * \return A string that must be freed by the caller.
 203  */
 204 char *get_time_string(int slot_num)
 205 {
 206         int ret, seconds = 0, length;
 207         struct timeval *tmp, sum, sss, /* server stream start */
 208                 rstime, /* receiver start time */
 209                 wstime, /* writer start time */
 210                 wtime, /* now - writer start */
 211                 rskip; /* receiver start - sss */
 212         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 213         char *msg;
 214
 215         if (audiod_status == AUDIOD_OFF)
 216                 goto empty;
 217         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 218                 if (stat_task->length_seconds) /* paused */
 219                         return NULL;
 220                 goto empty; /* stopped */
 221         }
 222         if (audiod_status == AUDIOD_ON && !s)
 223                 goto empty;
 224         /*
 225          * Valid status items and playing, set length and tmp to the stream
 226          * start. We use the slot info and fall back to the info from current
 227          * status items if no slot info is available.
 228          */
 229         length = stat_task->length_seconds;
 230         tmp = &stat_task->server_stream_start;
 231         if (s && s->wns) { /* writer active in this slot */
 232                 btr_get_node_start(s->wns[0].btrn, &wstime);
 233                 if (wstime.tv_sec != 0) { /* writer wrote something */
 234                         if (s->server_stream_start.tv_sec == 0) {
 235                                 /* copy status info to slot */
 236                                 s->server_stream_start = stat_task->server_stream_start;
 237                                 s->offset_seconds = stat_task->offset_seconds;
 238                                 s->seconds_total = stat_task->length_seconds;
 239                         }
 240                         length = s->seconds_total;
 241                         tmp = &s->server_stream_start;
 242                 }
 243         }
 244         if (stat_task->sa_time_diff_sign > 0)
 245                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 246         else
 247                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 248         if (!s || !s->wns) {
 249                 struct timeval diff;
 250                 tv_diff(now, &sss, &diff);
 251                 seconds = diff.tv_sec + stat_task->offset_seconds;
 252                 goto out;
 253         }
 254         tv_diff(now, &wstime, &wtime);
 255         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 256         seconds = s->offset_seconds;
 257         btr_get_node_start(s->receiver_node->btrn, &rstime);
 258         ret = tv_diff(&rstime, &sss, &rskip);
 259         if (ret > 0) { /* audiod was started in the middle of the stream */
 260                 tv_add(&wtime, &rskip, &sum);
 261                 seconds += sum.tv_sec;
 262         } else
 263                 seconds += wtime.tv_sec;
 264 out:
 265         seconds = PARA_MIN(seconds, length);
 266         seconds = PARA_MAX(seconds, 0);
 267         msg = make_message(
 268                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 269                 s? "" : "~",
 270                 seconds / 60,
 271                 seconds % 60,
 272                 (length - seconds) / 60,
 273                 (length - seconds) % 60,
 274                 length? (seconds * 100 + length / 2) / length : 0,
 275                 length / 60,
 276                 length % 60
 277         );
 278         PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 279         return msg;
 280 empty:
 281         return para_strdup(NULL);
 282 }
 283
 284 static int want_colors(void)
 285 {
 286         if (conf.color_arg == color_arg_no)
 287                 return 0;
 288         if (conf.color_arg == color_arg_yes)
 289                 return 1;
 290         if (conf.logfile_given)
 291                 return 0;
 292         return isatty(STDERR_FILENO);
 293 }
 294
 295 static void parse_config_or_die(void)
 296 {
 297         int ret;
 298         char *config_file;
 299         struct audiod_cmdline_parser_params params = {
 300                 .override = 0,
 301                 .initialize = 0,
 302                 .check_required = 1,
 303                 .check_ambiguity = 0,
 304                 .print_errors = 1
 305         };
 306
 307         if (conf.config_file_given)
 308                 config_file = para_strdup(conf.config_file_arg);
 309         else {
 310                 char *home = para_homedir();
 311                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 312                 free(home);
 313         }
 314         ret = file_exists(config_file);
 315         if (conf.config_file_given && !ret) {
 316                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 317                 goto err;
 318         }
 319         if (ret)
 320                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 321         free(config_file);
 322         daemon_set_loglevel(conf.loglevel_arg);
 323         return;
 324 err:
 325         free(config_file);
 326         exit(EXIT_FAILURE);
 327 }
 328
 329 static void setup_signal_handling(void)
 330 {
 331         sig_task->fd = para_signal_init();
 332         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 333         para_install_sighandler(SIGINT);
 334         para_install_sighandler(SIGTERM);
 335         para_install_sighandler(SIGHUP);
 336         para_sigaction(SIGPIPE, SIG_IGN);
 337 }
 338
 339 static void clear_slot(int slot_num)
 340 {
 341         struct slot_info *s = &slot[slot_num];
 342
 343         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 344         memset(s, 0, sizeof(struct slot_info));
 345         s->format = -1;
 346 }
 347
 348 static void close_receiver(int slot_num)
 349 {
 350         struct slot_info *s = &slot[slot_num];
 351         struct audio_format_info *a;
 352
 353         if (s->format < 0 || !s->receiver_node)
 354                 return;
 355         a = &afi[s->format];
 356         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 357                 audio_formats[s->format], slot_num);
 358         a->receiver->close(s->receiver_node);
 359         btr_free_node(s->receiver_node->btrn);
 360         free(s->receiver_node);
 361         s->receiver_node = NULL;
 362         tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
 363                 &a->restart_barrier);
 364 }
 365
 366 static void writer_cleanup(struct writer_node *wn)
 367 {
 368         struct writer *w;
 369
 370         if (!wn)
 371                 return;
 372         w = writers + wn->writer_num;
 373         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 374         w->close(wn);
 375         btr_free_node(wn->btrn);
 376 }
 377
 378 static void close_writers(struct slot_info *s)
 379 {
 380         struct audio_format_info *a;
 381         int i;
 382
 383         if (s->format < 0)
 384                 return;
 385         assert(s->wns);
 386         a = afi + s->format;
 387         if (a->num_writers == 0)
 388                 writer_cleanup(s->wns);
 389         else {
 390                 for (i = 0; i < a->num_writers; i++)
 391                         writer_cleanup(s->wns + i);
 392         }
 393         free(s->wns);
 394         s->wns = NULL;
 395 }
 396
 397 static void close_filters(struct slot_info *s)
 398 {
 399         int i;
 400         struct audio_format_info *a = afi + s->format;
 401         if (a->num_filters == 0)
 402                 return;
 403         for (i = 0; i < a->num_filters; i++) {
 404                 struct filter_node *fn = s->fns + i;
 405                 struct filter *f;
 406
 407                 if (!fn)
 408                         continue;
 409                 f = filters + fn->filter_num;
 410                 if (f->close)
 411                         f->close(fn);
 412                 btr_free_node(fn->btrn);
 413         }
 414         free(s->fns);
 415         s->fns = NULL;
 416 }
 417
 418 /*
 419  * Whenever a task commits suicide by returning from post_select with t->error
 420  * < 0, it also removes its btr node. We do exactly that to kill a running
 421  * task. Note that the scheduler checks t->error also _before_ each pre/post
 422  * select call, so the victim will never be scheduled again.
 423  */
 424 static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
 425 {
 426         if (t->error < 0)
 427                 return;
 428         t->error = error;
 429         btr_remove_node(btrn);
 430 }
 431
 432 static void kill_all_decoders(int error)
 433 {
 434         int i, j;
 435
 436         FOR_EACH_SLOT(i) {
 437                 struct slot_info *s = &slot[i];
 438                 struct audio_format_info *a;
 439                 if (s->format < 0)
 440                         continue;
 441                 a = afi + s->format;
 442                 if (s->wns)
 443                         for (j = 0; j < a->num_writers; j++)
 444                                 kill_btrn(s->wns[j].btrn, &s->wns[j].task, error);
 445                 if (s->fns)
 446                         for (j = 0; j < a->num_writers; j++)
 447                                 kill_btrn(s->fns[j].btrn, &s->wns[j].task, error);
 448                 if (s->receiver_node)
 449                         kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
 450                                 error);
 451         }
 452 }
 453
 454 static int get_empty_slot(void)
 455 {
 456         int i;
 457         struct slot_info *s;
 458
 459         FOR_EACH_SLOT(i) {
 460                 s = &slot[i];
 461                 if (s->format < 0) {
 462                         clear_slot(i);
 463                         return i;
 464                 }
 465                 if (s->wns || s->receiver_node || s->fns)
 466                         continue;
 467                 clear_slot(i);
 468                 return i;
 469         }
 470         return -E_NO_MORE_SLOTS;
 471 }
 472
 473 static void open_filters(struct slot_info *s)
 474 {
 475         struct audio_format_info *a = afi + s->format;
 476         struct filter_node *fn;
 477         int nf = a->num_filters;
 478         struct btr_node *parent;
 479         int i;
 480
 481         if (nf == 0)
 482                 return;
 483         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 484         assert(s->fns == NULL);
 485         s->fns = para_calloc(nf * sizeof(struct filter_node));
 486         parent = s->receiver_node->btrn;
 487         for (i = 0; i < nf; i++) {
 488                 struct filter *f = filters + a->filter_nums[i];
 489                 fn = s->fns + i;
 490                 fn->filter_num = a->filter_nums[i];
 491                 fn->conf = a->filter_conf[i];
 492                 fn->task.pre_select = f->pre_select;
 493                 fn->task.post_select = f->post_select;
 494
 495                 fn->btrn = btr_new_node(&(struct btr_node_description)
 496                         EMBRACE(.name = f->name, .parent = parent,
 497                                 .handler = f->execute, .context = fn));
 498
 499                 f->open(fn);
 500                 register_task(&fn->task);
 501                 parent = fn->btrn;
 502                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 503                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 504                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 505         }
 506 }
 507
 508 static void open_writers(struct slot_info *s)
 509 {
 510         int i;
 511         struct audio_format_info *a = afi + s->format;
 512         struct writer_node *wn;
 513         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 514
 515         assert(s->wns == NULL);
 516         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 517                 * sizeof(struct writer_node));
 518         if (a->num_writers == 0)
 519                 setup_writer_node(NULL, parent, s->wns);
 520         else {
 521                 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 522                 for (i = 0; i < a->num_writers; i++) {
 523                         wn = s->wns + i;
 524                         wn->conf = a->writer_conf[i];
 525                         wn->writer_num = a->writer_nums[i];
 526                         register_writer_node(wn, parent);
 527                 }
 528         }
 529 }
 530
 531 /* returns slot num on success */
 532 static int open_receiver(int format)
 533 {
 534         struct audio_format_info *a = &afi[format];
 535         struct slot_info *s;
 536         int ret, slot_num;
 537         struct receiver *r = a->receiver;
 538         struct receiver_node *rn;
 539
 540         tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
 541         ret = get_empty_slot();
 542         if (ret < 0)
 543                 return ret;
 544         slot_num = ret;
 545         rn = para_calloc(sizeof(*rn));
 546         rn->receiver = r;
 547         rn->conf = a->receiver_conf;
 548         rn->btrn = btr_new_node(&(struct btr_node_description)
 549                 EMBRACE(.name = r->name, .context = rn));
 550         ret = r->open(rn);
 551         if (ret < 0) {
 552                 btr_free_node(rn->btrn);
 553                 free(rn);
 554                 return ret;
 555         }
 556         s = &slot[slot_num];
 557         s->format = format;
 558         s->receiver_node = rn;
 559         PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
 560                 audio_formats[format], r->name, slot_num);
 561         rn->task.pre_select = r->pre_select;
 562         rn->task.post_select = r->post_select;
 563         sprintf(rn->task.status, "%s receiver node", r->name);
 564         register_task(&rn->task);
 565         return slot_num;
 566 }
 567
 568 static bool receiver_running(void)
 569 {
 570         int i;
 571         long unsigned ss1 = stat_task->server_stream_start.tv_sec;
 572
 573         FOR_EACH_SLOT(i) {
 574                 struct slot_info *s = &slot[i];
 575                 long unsigned ss2 = s->server_stream_start.tv_sec;
 576
 577                 if (!s->receiver_node)
 578                         continue;
 579                 if (s->receiver_node->task.error >= 0)
 580                         return true;
 581                 if (ss1 == ss2)
 582                         return true;
 583         }
 584         return false;
 585 }
 586
 587 /**
 588  * Return the root node of the current buffer tree.
 589  *
 590  * This is only used for stream grabbing.
 591  *
 592  * \return \p NULL if no slot is currently active. If more than one buffer tree
 593  * exists, the node corresponding to the most recently started receiver is
 594  * returned.
 595  */
 596 struct btr_node *audiod_get_btr_root(void)
 597 {
 598         int i, newest_slot = -1;
 599         struct timeval newest_rstime = {0, 0};
 600
 601         FOR_EACH_SLOT(i) {
 602                 struct slot_info *s = &slot[i];
 603                 struct timeval rstime;
 604                 if (!s->receiver_node)
 605                         continue;
 606                 if (s->receiver_node->task.error < 0)
 607                         continue;
 608                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 609                 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
 610                         continue;
 611                 newest_rstime = rstime;
 612                 newest_slot = i;
 613         }
 614         if (newest_slot == -1)
 615                 return NULL;
 616         return slot[newest_slot].receiver_node->btrn;
 617 }
 618
 619 /* whether a new instance of a decoder should be started. */
 620 static bool must_start_decoder(void)
 621 {
 622         int cafn = stat_task->current_audio_format_num;
 623         unsigned vs = stat_task->vss_status;
 624
 625         if (audiod_status != AUDIOD_ON)
 626                 return false;
 627         if (cafn < 0)
 628                 return false;
 629         if (!stat_task->ct)
 630                 return false;
 631         if (vs & VSS_STATUS_FLAG_NEXT)
 632                 return false;
 633         if (!(vs & VSS_STATUS_FLAG_PLAYING))
 634                 return false;
 635         if (receiver_running())
 636                 return false;
 637         if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
 638                 return false;
 639         return true;
 640 }
 641
 642 static unsigned compute_time_diff(const struct timeval *status_time)
 643 {
 644         struct timeval tmp, diff;
 645         static unsigned count;
 646         int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
 647         const struct timeval max_deviation = {0, 500 * 1000};
 648         const int time_smooth = 5;
 649
 650         if (!status_time)
 651                 return count;
 652         sign = tv_diff(status_time, now, &diff);
 653 //              PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
 654 //                      sign, sa_time_diff_sign);
 655         if (!count) {
 656                 sa_time_diff_sign = sign;
 657                 stat_task->sa_time_diff = diff;
 658                 count++;
 659                 goto out;
 660         }
 661         if (count > 5) {
 662                 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
 663                 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
 664                         PARA_WARNING_LOG("time diff jump: %lims\n",
 665                                 s * tv2ms(&tmp));
 666         }
 667         count++;
 668         sa_time_diff_sign = tv_convex_combination(
 669                 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
 670                 count > 10? sign : sign * time_smooth, &diff,
 671                 &tmp);
 672         stat_task->sa_time_diff = tmp;
 673         PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
 674                 sign < 0? "-" : "+",
 675                 tv2ms(&diff),
 676                 sa_time_diff_sign < 0? "-" : "+",
 677                 tv2ms(&stat_task->sa_time_diff)
 678         );
 679 out:
 680         stat_task->sa_time_diff_sign = sa_time_diff_sign;
 681         return count;
 682 }
 683
 684 static int update_item(int itemnum, char *buf)
 685 {
 686         long unsigned sec, usec;
 687
 688         if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
 689                 return 1;
 690         free(stat_item_values[itemnum]);
 691         stat_item_values[itemnum] = para_strdup(buf);
 692         stat_client_write_item(itemnum);
 693         switch (itemnum) {
 694         case SI_STATUS_FLAGS:
 695                 stat_task->vss_status = 0;
 696                 if (strchr(buf, 'N'))
 697                         stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
 698                 if (strchr(buf, 'P'))
 699                         stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
 700                 break;
 701         case SI_OFFSET:
 702                 stat_task->offset_seconds = atoi(buf);
 703                 break;
 704         case SI_SECONDS_TOTAL:
 705                 stat_task->length_seconds = atoi(buf);
 706                 break;
 707         case SI_STREAM_START:
 708                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 709                         stat_task->server_stream_start.tv_sec = sec;
 710                         stat_task->server_stream_start.tv_usec = usec;
 711                 }
 712                 break;
 713         case SI_CURRENT_TIME:
 714                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 715                         struct timeval tv = {sec, usec};
 716                         compute_time_diff(&tv);
 717                 }
 718                 break;
 719         case SI_FORMAT:
 720                 stat_task->current_audio_format_num
 721                         = get_audio_format_num(buf);
 722         }
 723         return 1;
 724 }
 725
 726 static int parse_stream_command(const char *txt, char **cmd)
 727 {
 728         char *p = strchr(txt, ':');
 729         int i;
 730
 731         if (!p)
 732                 return -E_MISSING_COLON;
 733         p++;
 734         FOR_EACH_AUDIO_FORMAT(i) {
 735                 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
 736                         continue;
 737                 *cmd = p;
 738                 return i;
 739         }
 740         return -E_UNSUPPORTED_AUDIO_FORMAT;
 741 }
 742
 743 static int add_filter(int format, char *cmdline)
 744 {
 745         struct audio_format_info *a = &afi[format];
 746         int filter_num, nf = a->num_filters;
 747
 748         filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
 749         if (filter_num < 0)
 750                 return filter_num;
 751         a->filter_nums[nf] = filter_num;
 752         a->num_filters++;
 753         PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
 754                 filters[filter_num].name);
 755         return filter_num;
 756 }
 757
 758 static int parse_writer_args(void)
 759 {
 760         int i, ret, nw;
 761         char *cmd;
 762         struct audio_format_info *a;
 763
 764         nw = PARA_MAX(1U, conf.writer_given);
 765         PARA_INFO_LOG("maximal number of writers: %d\n", nw);
 766         FOR_EACH_AUDIO_FORMAT(i) {
 767                 a = &afi[i];
 768                 a->writer_conf = para_malloc(nw * sizeof(void *));
 769                 a->writer_nums = para_malloc(nw * sizeof(int));
 770                 a->num_writers = 0;
 771         }
 772         for (i = 0; i < conf.writer_given; i++) {
 773                 void *wconf;
 774                 int writer_num;
 775                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 776                 if (ret < 0)
 777                         goto out;
 778                 a = &afi[ret];
 779                 nw = a->num_writers;
 780                 wconf = check_writer_arg(cmd, &writer_num);
 781                 if (!wconf) {
 782                         ret = writer_num;
 783                         goto out;
 784                 }
 785                 a->writer_nums[nw] = writer_num;
 786                 a->writer_conf[nw] = wconf;
 787                 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
 788                         nw, writer_names[writer_num]);
 789                 a->num_writers++;
 790         }
 791         ret = 1;
 792 out:
 793         return ret;
 794 }
 795
 796 static int parse_receiver_args(void)
 797 {
 798         int i, ret, receiver_num;
 799         char *cmd = NULL;
 800         struct audio_format_info *a;
 801
 802         for (i = conf.receiver_given - 1; i >= 0; i--) {
 803                 char *arg = conf.receiver_arg[i];
 804                 char *recv_arg = strchr(arg, ':');
 805                 ret = -E_MISSING_COLON;
 806                 if (!recv_arg)
 807                         goto out;
 808                 *recv_arg = '\0';
 809                 recv_arg++;
 810                 ret = get_audio_format_num(arg);
 811                 if (ret < 0)
 812                         goto out;
 813                 /*
 814                  * If multiple receivers are given for this audio format, the
 815                  * last one wins and we have to free the previous receiver
 816                  * config here. Since we are iterating backwards, the winning
 817                  * receiver arg is in fact the first one given.
 818                  */
 819                 if (afi[ret].receiver_conf)
 820                         afi[ret].receiver->free_config(afi[ret].receiver_conf);
 821                 afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
 822                 if (!afi[ret].receiver_conf) {
 823                         ret = -E_RECV_SYNTAX;
 824                         goto out;
 825                 }
 826                 afi[ret].receiver = &receivers[receiver_num];
 827         }
 828         /*
 829          * Use the first available receiver with no arguments for those audio
 830          * formats for which no receiver was specified.
 831          */
 832         cmd = para_strdup(receivers[0].name);
 833         FOR_EACH_AUDIO_FORMAT(i) {
 834                 a = &afi[i];
 835                 if (a->receiver_conf)
 836                         continue;
 837                 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
 838                 if (!a->receiver_conf)
 839                         return -E_RECV_SYNTAX;
 840                 a->receiver = &receivers[receiver_num];
 841         }
 842         ret = 1;
 843 out:
 844         free(cmd);
 845         return ret;
 846 }
 847
 848 static int init_default_filters(void)
 849 {
 850         int i, ret = 1;
 851
 852         FOR_EACH_AUDIO_FORMAT(i) {
 853                 struct audio_format_info *a = &afi[i];
 854                 char *tmp;
 855                 int j;
 856
 857                 if (a->num_filters)
 858                         continue; /* no default -- nothing to to */
 859                 /*
 860                  * If udp is used to receive this audiod format, add fecdec as
 861                  * the first filter.
 862                  */
 863                 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
 864                                 strcmp(afi[i].receiver->name, "dccp") == 0) {
 865                         tmp = para_strdup("fecdec");
 866                         add_filter(i, tmp);
 867                         free(tmp);
 868                         if (ret < 0)
 869                                 goto out;
 870                 }
 871                 /* add "dec" to audio format name */
 872                 tmp = make_message("%sdec", audio_formats[i]);
 873                 for (j = 0; filters[j].name; j++)
 874                         if (!strcmp(tmp, filters[j].name))
 875                                 break;
 876                 free(tmp);
 877                 ret = -E_UNSUPPORTED_FILTER;
 878                 if (!filters[j].name)
 879                         goto out;
 880                 tmp = para_strdup(filters[j].name);
 881                 ret = add_filter(i, tmp);
 882                 free(tmp);
 883                 if (ret < 0)
 884                         goto out;
 885                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 886                         filters[j].name);
 887         }
 888 out:
 889         return ret;
 890 }
 891
 892 static int parse_filter_args(void)
 893 {
 894         int i, ret, nf;
 895
 896         nf = PARA_MAX(2U, conf.filter_given);
 897         PARA_INFO_LOG("maximal number of filters: %d\n", nf);
 898         FOR_EACH_AUDIO_FORMAT(i) {
 899                 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
 900                 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
 901         }
 902         if (!conf.no_default_filters_given)
 903                 return init_default_filters();
 904         for (i = 0; i < conf.filter_given; i++) {
 905                 char *arg = conf.filter_arg[i];
 906                 char *filter_name = strchr(arg, ':');
 907                 ret = -E_MISSING_COLON;
 908                 if (!filter_name)
 909                         goto out;
 910                 *filter_name = '\0';
 911                 filter_name++;
 912                 ret = get_audio_format_num(arg);
 913                 if (ret < 0)
 914                         goto out;
 915                 ret = add_filter(ret, filter_name);
 916                 if (ret < 0)
 917                         goto out;
 918         }
 919         ret = init_default_filters(); /* use default values for the rest */
 920 out:
 921         return ret;
 922 }
 923
 924 static int parse_stream_args(void)
 925 {
 926         int ret;
 927
 928         ret = parse_receiver_args();
 929         if (ret < 0)
 930                 return ret;
 931         ret = parse_filter_args();
 932         if (ret < 0)
 933                 return ret;
 934         ret = parse_writer_args();
 935         if (ret < 0)
 936                 return ret;
 937         return 1;
 938 }
 939
 940 /* does not unlink socket on errors */
 941 static int audiod_get_socket(void)
 942 {
 943         struct sockaddr_un unix_addr;
 944         int ret, fd;
 945
 946         if (conf.socket_given)
 947                 socket_name = para_strdup(conf.socket_arg);
 948         else {
 949                 char *hn = para_hostname();
 950                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 951                         hn);
 952                 free(hn);
 953         }
 954         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 955         if (conf.force_given)
 956                 unlink(socket_name);
 957         ret = create_local_socket(socket_name, &unix_addr,
 958                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 959         if (ret < 0)
 960                 goto err;
 961         fd = ret;
 962         if (listen(fd , 5) < 0) {
 963                 ret = -ERRNO_TO_PARA_ERROR(errno);
 964                 goto err;
 965         }
 966         ret = mark_fd_nonblocking(fd);
 967         if (ret < 0)
 968                 goto err;
 969         return fd;
 970 err:
 971         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 972         exit(EXIT_FAILURE);
 973 }
 974
 975 static void signal_pre_select(struct sched *s, struct task *t)
 976 {
 977         struct signal_task *st = container_of(t, struct signal_task, task);
 978         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 979 }
 980
 981 static void signal_post_select(struct sched *s, __a_unused struct task *t)
 982 {
 983         int signum;
 984
 985         signum = para_next_signal(&s->rfds);
 986         switch (signum) {
 987         case SIGINT:
 988         case SIGTERM:
 989         case SIGHUP:
 990                 PARA_EMERG_LOG("terminating on signal %d\n", signum);
 991                 clean_exit(EXIT_FAILURE, "caught deadly signal");
 992         }
 993 }
 994
 995 static void signal_setup_default(struct signal_task *st)
 996 {
 997         st->task.pre_select = signal_pre_select;
 998         st->task.post_select = signal_post_select;
 999         sprintf(st->task.status, "signal task");
1000 }
1001
1002 static void command_pre_select(struct sched *s, struct task *t)
1003 {
1004         struct command_task *ct = container_of(t, struct command_task, task);
1005         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1006 }
1007
1008 static void command_post_select(struct sched *s, struct task *t)
1009 {
1010         int ret;
1011         struct command_task *ct = container_of(t, struct command_task, task);
1012         static struct timeval last_status_dump;
1013         struct timeval tmp, delay = {0, 500 * 1000};
1014
1015         tv_add(&last_status_dump, &delay, &tmp);
1016         if (tv_diff(&tmp, now, NULL) < 0) {
1017                 audiod_status_dump();
1018                 last_status_dump = *now;
1019         }
1020
1021         ret = handle_connect(ct->fd, &s->rfds);
1022         if (ret < 0)
1023                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1024         audiod_status_dump();
1025 }
1026
1027 static void init_command_task(struct command_task *ct)
1028 {
1029         ct->task.pre_select = command_pre_select;
1030         ct->task.post_select = command_post_select;
1031         ct->task.error = 0;
1032         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1033         sprintf(ct->task.status, "command task");
1034 }
1035
1036 static void close_stat_pipe(void)
1037 {
1038         if (!stat_task->ct)
1039                 return;
1040         btr_free_node(stat_task->ct->btrn);
1041         client_close(stat_task->ct);
1042         stat_task->ct = NULL;
1043         clear_and_dump_items();
1044         stat_task->length_seconds = 0;
1045         stat_task->offset_seconds = 0;
1046         stat_task->vss_status = 0;
1047         stat_task->current_audio_format_num = -1;
1048         audiod_status_dump();
1049 }
1050
1051 /**
1052  * close the connection to para_server and exit
1053  *
1054  * \param status the exit status which is passed to exit(3)
1055  * \param msg the log message
1056  *
1057  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1058  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1059  * EXIT_FAILURE.
1060  *
1061  * \sa exit(3)
1062  */
1063 void __noreturn clean_exit(int status, const char *msg)
1064 {
1065         PARA_EMERG_LOG("%s\n", msg);
1066         if (socket_name)
1067                 unlink(socket_name);
1068         close_stat_pipe();
1069         exit(status);
1070 }
1071
1072 /* avoid busy loop if server is down */
1073 static void set_stat_task_restart_barrier(unsigned seconds)
1074 {
1075         struct timeval delay = {seconds, 0};
1076         tv_add(now, &delay, &stat_task->restart_barrier);
1077 }
1078
1079 static void try_to_close_slot(int slot_num)
1080 {
1081         struct slot_info *s = &slot[slot_num];
1082         struct audio_format_info *a = afi + s->format;
1083         int i;
1084
1085         if (s->format < 0)
1086                 return;
1087         if (s->receiver_node && s->receiver_node->task.error >= 0)
1088                 return;
1089         for (i = 0; i < a->num_filters; i++)
1090                 if (s->fns && s->fns[i].task.error >= 0)
1091                         return;
1092         if (a->num_writers > 0) {
1093                 for (i = 0; i < a->num_writers; i++)
1094                         if (s->wns && s->wns[i].task.error >= 0)
1095                                 return;
1096         } else {
1097                 if (s->wns && s->wns[0].task.error >= 0)
1098                         return;
1099         }
1100         PARA_INFO_LOG("closing slot %d\n", slot_num);
1101         close_writers(s);
1102         close_filters(s);
1103         close_receiver(slot_num);
1104         clear_slot(slot_num);
1105 }
1106
1107 /*
1108  * Check if any receivers/filters/writers need to be started and do so if
1109  * necessary.
1110  */
1111 static void start_stop_decoders(void)
1112 {
1113         int i, ret;
1114         struct slot_info *sl;
1115         struct audio_format_info *a;
1116
1117         FOR_EACH_SLOT(i)
1118                 try_to_close_slot(i);
1119         if (audiod_status != AUDIOD_ON ||
1120                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1121                 return kill_all_decoders(-E_NOT_PLAYING);
1122         if (!must_start_decoder())
1123                 return;
1124         ret = open_receiver(stat_task->current_audio_format_num);
1125         if (ret < 0) {
1126                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1127                 return;
1128         }
1129         sl = slot + ret;
1130         a = afi + sl->format;
1131         if (a->num_filters)
1132                 open_filters(sl);
1133         open_writers(sl);
1134         activate_grab_clients();
1135         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1136 }
1137
1138 static void status_pre_select(struct sched *s, struct task *t)
1139 {
1140         struct status_task *st = container_of(t, struct status_task, task);
1141         int ret, cafn = stat_task->current_audio_format_num;
1142
1143         if (must_start_decoder())
1144                 goto min_delay;
1145         ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
1146         if (ret > 0)
1147                 goto min_delay;
1148         if (st->ct && audiod_status == AUDIOD_OFF)
1149                 goto min_delay;
1150         if (!st->ct && audiod_status != AUDIOD_OFF)
1151                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1152         if (cafn >= 0)
1153                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1154         /*
1155          * If para_server is playing we'd like to have a smooth time display
1156          * even if we are running in standby mode. So we request a timeout that
1157          * expires at the next full second.
1158          */
1159         if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1160                 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1161         return;
1162 min_delay:
1163         sched_min_delay(s);
1164 }
1165
1166 /* restart the client task if necessary */
1167 static void status_post_select(__a_unused struct sched *s, struct task *t)
1168 {
1169         struct status_task *st = container_of(t, struct status_task, task);
1170
1171         if (audiod_status == AUDIOD_OFF) {
1172                 if (!st->ct)
1173                         goto out;
1174                 if (st->ct->task.error >= 0) {
1175                         kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
1176                         goto out;
1177                 }
1178                 if (st->ct->task.error >= 0)
1179                         goto out;
1180                 close_stat_pipe();
1181                 st->clock_diff_count = conf.clock_diff_count_arg;
1182                 goto out;
1183         }
1184         if (st->ct) {
1185                 char *buf;
1186                 size_t sz;
1187                 int ret;
1188                 if (st->ct->task.error < 0) {
1189                         if (st->ct->task.error >= 0)
1190                                 goto out;
1191                         close_stat_pipe();
1192                         goto out;
1193                 }
1194                 if (st->ct->status != CL_RECEIVING)
1195                         goto out;
1196                 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1197                 if (ret <= 0) {
1198                         struct timeval diff;
1199                         tv_diff(now, &st->last_status_read, &diff);
1200                         if (diff.tv_sec > 61)
1201                                 kill_btrn(st->ct->btrn, &st->ct->task,
1202                                         -E_STATUS_TIMEOUT);
1203                         goto out;
1204                 }
1205                 btr_merge(st->btrn, st->min_iqs);
1206                 sz = btr_next_buffer(st->btrn, &buf);
1207                 ret = for_each_stat_item(buf, sz, update_item);
1208                 if (ret < 0) {
1209                         kill_btrn(st->ct->btrn, &st->ct->task, ret);
1210                         goto out;
1211                 }
1212                 if (sz != ret) {
1213                         btr_consume(st->btrn, sz - ret);
1214                         st->last_status_read = *now;
1215                         st->min_iqs = 0;
1216                 } else /* current status item crosses buffers */
1217                         st->min_iqs = sz + 1;
1218                 goto out;
1219         }
1220         btr_drain(st->btrn);
1221         st->current_audio_format_num = -1;
1222         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1223                 goto out;
1224         if (st->clock_diff_count) { /* get status only one time */
1225                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1226                 int argc = 5;
1227                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1228                 st->clock_diff_count--;
1229                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1230                 set_stat_task_restart_barrier(2);
1231
1232         } else {
1233                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1234                 int argc = 4;
1235                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1236                 set_stat_task_restart_barrier(5);
1237         }
1238         free(stat_item_values[SI_BASENAME]);
1239         stat_item_values[SI_BASENAME] = para_strdup(
1240                 "no connection to para_server");
1241         stat_client_write_item(SI_BASENAME);
1242         st->last_status_read = *now;
1243 out:
1244         start_stop_decoders();
1245 }
1246
1247 static void init_status_task(struct status_task *st)
1248 {
1249         memset(st, 0, sizeof(struct status_task));
1250         st->task.pre_select = status_pre_select;
1251         st->task.post_select = status_post_select;
1252         st->sa_time_diff_sign = 1;
1253         st->clock_diff_count = conf.clock_diff_count_arg;
1254         st->current_audio_format_num = -1;
1255         sprintf(st->task.status, "stat");
1256         st->btrn = btr_new_node(&(struct btr_node_description)
1257                 EMBRACE(.name = "stat"));
1258 }
1259
1260 static void set_initial_status(void)
1261 {
1262         audiod_status = AUDIOD_ON;
1263         if (!conf.mode_given)
1264                 return;
1265         if (!strcmp(conf.mode_arg, "sb")) {
1266                 audiod_status = AUDIOD_STANDBY;
1267                 return;
1268         }
1269         if (!strcmp(conf.mode_arg, "off")) {
1270                 audiod_status = AUDIOD_OFF;
1271                 return;
1272         }
1273         if (strcmp(conf.mode_arg, "on"))
1274                 PARA_WARNING_LOG("invalid mode\n");
1275 }
1276
1277 __noreturn static void print_help_and_die(void)
1278 {
1279         int d = conf.detailed_help_given;
1280         const char **p = d? audiod_args_info_detailed_help
1281                 : audiod_args_info_help;
1282
1283         printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1284                 AUDIOD_CMDLINE_PARSER_VERSION);
1285         printf_or_die("%s\n\n", audiod_args_info_usage);
1286         for (; *p; p++)
1287                 printf_or_die("%s\n", *p);
1288         print_receiver_helps(d);
1289         print_filter_helps(d);
1290         print_writer_helps(d);
1291         exit(0);
1292 }
1293
1294 static void init_colors_or_die(void)
1295 {
1296         int i;
1297
1298         if (!want_colors())
1299                 return;
1300         daemon_set_default_log_colors();
1301         daemon_set_flag(DF_COLOR_LOG);
1302         for (i = 0; i < conf.log_color_given; i++)
1303                 daemon_set_log_color_or_die(conf.log_color_arg[i]);
1304 }
1305
1306 /**
1307  * the main function of para_audiod
1308  *
1309  * \param argc usual argument count
1310  * \param argv usual argument vector
1311  *
1312  * \return EXIT_SUCCESS or EXIT_FAILURE
1313  *
1314  * \sa para_audiod(1)
1315  * */
1316 int main(int argc, char *argv[])
1317 {
1318         int ret, i;
1319         static struct sched s;
1320         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1321         struct audiod_cmdline_parser_params params = {
1322                 .override = 0,
1323                 .initialize = 1,
1324                 .check_required = 0,
1325                 .check_ambiguity = 0,
1326                 .print_errors = 1
1327         };
1328
1329         valid_fd_012();
1330         if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1331                 exit(EXIT_FAILURE);
1332         HANDLE_VERSION_FLAG("audiod", conf);
1333         /* init receivers/filters/writers early to make help work */
1334         recv_init();
1335         filter_init();
1336         writer_init();
1337         if (conf.help_given || conf.detailed_help_given)
1338                 print_help_and_die();
1339         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1340         parse_config_or_die();
1341         init_colors_or_die();
1342         init_random_seed_or_die();
1343         daemon_set_flag(DF_LOG_TIME);
1344         daemon_set_flag(DF_LOG_HOSTNAME);
1345         daemon_set_flag(DF_LOG_LL);
1346         if (conf.log_timing_given)
1347                 daemon_set_flag(DF_LOG_TIMING);
1348         if (conf.logfile_given) {
1349                 daemon_set_logfile(conf.logfile_arg);
1350                 daemon_open_log_or_die();
1351         }
1352         ret = parse_stream_args();
1353         if (ret < 0) {
1354                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1355                 exit(EXIT_FAILURE);
1356         }
1357         log_welcome("para_audiod");
1358         server_uptime(UPTIME_SET);
1359         set_initial_status();
1360         FOR_EACH_SLOT(i)
1361                 clear_slot(i);
1362         setup_signal_handling();
1363         signal_setup_default(sig_task);
1364
1365         init_status_task(stat_task);
1366         init_command_task(cmd_task);
1367
1368         if (conf.daemon_given)
1369                 daemonize();
1370
1371         register_task(&sig_task->task);
1372         register_task(&cmd_task->task);
1373         register_task(&stat_task->task);
1374         s.default_timeout.tv_sec = 2;
1375         s.default_timeout.tv_usec = 999 * 1000;
1376         ret = schedule(&s);
1377
1378         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1379         return EXIT_FAILURE;
1380 }