audiod.c

   1 /*
   2  * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file audiod.c the paraslash's audio daemon */
   8 #include <regex.h>
   9 #include <sys/types.h>
  10 #include <signal.h>
  11 #include <stdbool.h>
  12
  13 #include "para.h"
  14 #include "error.h"
  15 #include "crypt.h"
  16 #include "audiod.cmdline.h"
  17 #include "list.h"
  18 #include "sched.h"
  19 #include "ggo.h"
  20 #include "recv.h"
  21 #include "buffer_tree.h"
  22 #include "filter.h"
  23 #include "grab_client.h"
  24 #include "client.cmdline.h"
  25 #include "client.h"
  26 #include "audiod.h"
  27 #include "net.h"
  28 #include "daemon.h"
  29 #include "string.h"
  30 #include "fd.h"
  31 #include "write.h"
  32 #include "write_common.h"
  33 #include "signal.h"
  34 #include "version.h"
  35
  36 __printf_2_3 void (*para_log)(int, const char*, ...) = daemon_log;
  37 /** define the array of error lists needed by para_audiod */
  38 INIT_AUDIOD_ERRLISTS;
  39 /** define the array containing all supported audio formats */
  40 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
  41
  42 /** Defines how audiod handles one supported audio format. */
  43 struct audio_format_info {
  44         /** pointer to the receiver for this audio format */
  45         struct receiver *receiver;
  46         /** the receiver configuration */
  47         void *receiver_conf;
  48         /** the number of filters that should be activated for this audio format */
  49         unsigned int num_filters;
  50         /** Array of filter numbers to be activated. */
  51         unsigned *filter_nums;
  52         /** Pointer to the array of filter configurations. */
  53         void **filter_conf;
  54         /** the number of filters that should be activated for this audio format */
  55         unsigned int num_writers;
  56         /** Array of writer numbers to be activated. */
  57         int *writer_nums;
  58         /** pointer to the array of writer configurations */
  59         void **writer_conf;
  60         /** do not start receiver/filters/writer before this time */
  61         struct timeval restart_barrier;
  62 };
  63
  64 /**
  65  * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
  66  * be associated with a receiver/filter/writer triple. This array holds all
  67  * information on the status of these slots.
  68  *
  69  * \sa struct slot_info
  70  * */
  71 struct slot_info slot[MAX_STREAM_SLOTS];
  72
  73 /** The vss status flags audiod is interested in. */
  74 enum vss_status_flags {
  75         /** Whether the 'N' flag is set. */
  76         VSS_STATUS_FLAG_NEXT = 1,
  77         /** The 'P' flag is set. */
  78         VSS_STATUS_FLAG_PLAYING = 2,
  79 };
  80
  81 /**
  82  * The task for obtaining para_server's status (para_client stat).
  83  *
  84  * \sa struct task, struct sched.
  85  */
  86 struct status_task {
  87         /** The associated task structure of audiod. */
  88         struct task task;
  89         /** Client data associated with the stat task. */
  90         struct client_task *ct;
  91         /** Do not restart client command until this time. */
  92         struct timeval restart_barrier;
  93         /** Last time we received status data from para_server. */
  94         struct timeval last_status_read;
  95         size_t min_iqs;
  96         /** The offset value announced by para_server. */
  97         int offset_seconds;
  98         /** The length of the current audio file as announced by para_server. */
  99         int length_seconds;
 100         /** The start of the current stream from the view of para_server. */
 101         struct timeval server_stream_start;
 102         /** The average time deviation between para_server and para_audiod. */
 103         struct timeval sa_time_diff;
 104         /** Whether client time is ahead of server time. */
 105         int sa_time_diff_sign;
 106         /** The 'P' and the 'N' flags as announced by para_server. */
 107         enum vss_status_flags vss_status;
 108         /** Number of times the clock difference is to be checked. */
 109         unsigned clock_diff_count;
 110         /** When to start the next check for clock difference. */
 111         struct timeval clock_diff_barrier;
 112         /** Number of the audio format as announced by para_server. */
 113         int current_audio_format_num;
 114         /* The status task btrn is the child of the client task. */
 115         struct btr_node *btrn;
 116 };
 117
 118 /** The array of status items sent by para_server. */
 119 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 120
 121 /**
 122  * the current mode of operation of which can be changed by the on/off/cycle
 123  * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
 124  */
 125 int audiod_status = AUDIOD_ON;
 126
 127 /**
 128  * the gengetopt args_info struct that holds information on all command line
 129  * arguments
 130  */
 131 struct audiod_args_info conf;
 132
 133 static char *socket_name;
 134 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 135
 136 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
 137
 138 static struct status_task status_task_struct;
 139
 140 /**
 141  * the task that calls the status command of para_server
 142  *
 143  * \sa struct status_task
 144  */
 145 static struct status_task *stat_task = &status_task_struct;
 146
 147 /**
 148  * the task for handling audiod commands
 149  *
 150  * \sa struct task, struct sched
 151  */
 152 struct command_task {
 153         /** the local listening socket */
 154         int fd;
 155         /** the associated task structure */
 156         struct task task;
 157 };
 158
 159 /** iterate over all supported audio formats */
 160 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 161
 162 /**
 163  * Get the audio format number.
 164  *
 165  * \param name The name of the audio format.
 166  *
 167  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
 168  * \a name is not a supported audio format.
 169  */
 170 static int get_audio_format_num(const char *name)
 171 {
 172         int i;
 173
 174         while (para_isspace(*name))
 175                 name++;
 176         FOR_EACH_AUDIO_FORMAT(i)
 177                 if (!strcmp(name, audio_formats[i]))
 178                         return i;
 179         return -E_UNSUPPORTED_AUDIO_FORMAT;
 180 }
 181
 182 static int get_matching_audio_format_nums(const char *re)
 183 {
 184         int i, ret;
 185         regex_t preg;
 186
 187         ret = para_regcomp(&preg, re, REG_EXTENDED | REG_NOSUB);
 188         if (ret < 0)
 189                 return ret;
 190         ret = 0;
 191         FOR_EACH_AUDIO_FORMAT(i)
 192                 if (regexec(&preg, audio_formats[i], 0, NULL, 0) != REG_NOMATCH)
 193                         ret |= (1 << i);
 194         regfree(&preg);
 195         return ret;
 196 }
 197
 198 /**
 199  * Compute the play time based on information of the given slot.
 200  *
 201  * \param slot_num The slot number (negative means: no slot).
 202  *
 203  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 204  * from the status items received from para_server and the start time of the
 205  * (first) writer of the given slot.
 206  *
 207  * It has to to take into account that probably the stream was not started at
 208  * the beginning of the file, that the clock between the server and the client
 209  * host may differ and that playback of the stream was delayed, e.g. because
 210  * the prebuffer filter is used in the filter configuration of the given slot.
 211  *
 212  * If no writer is active in the given slot, or \a slot_num is negative
 213  * (indicating that para_audiod runs in standby mode), an approximation based
 214  * only on the status items is computed and the returned string is prefixed
 215  * with "~".
 216  *
 217  * \return A string that must be freed by the caller.
 218  */
 219 char *get_time_string(int slot_num)
 220 {
 221         int ret, seconds = 0, length;
 222         struct timeval *tmp, sum, sss, /* server stream start */
 223                 rstime, /* receiver start time */
 224                 wstime, /* writer start time */
 225                 wtime, /* now - writer start */
 226                 rskip; /* receiver start - sss */
 227         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 228         char *msg;
 229
 230         if (audiod_status == AUDIOD_OFF)
 231                 goto empty;
 232         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 233                 if (stat_task->length_seconds) /* paused */
 234                         return NULL;
 235                 goto empty; /* stopped */
 236         }
 237         if (audiod_status == AUDIOD_ON && !s)
 238                 goto empty;
 239         /*
 240          * Valid status items and playing, set length and tmp to the stream
 241          * start. We use the slot info and fall back to the info from current
 242          * status items if no slot info is available.
 243          */
 244         length = stat_task->length_seconds;
 245         tmp = &stat_task->server_stream_start;
 246         if (s && s->wns) { /* writer active in this slot */
 247                 btr_get_node_start(s->wns[0].btrn, &wstime);
 248                 if (wstime.tv_sec != 0) { /* writer wrote something */
 249                         if (s->server_stream_start.tv_sec == 0) {
 250                                 /* copy status info to slot */
 251                                 s->server_stream_start = stat_task->server_stream_start;
 252                                 s->offset_seconds = stat_task->offset_seconds;
 253                                 s->seconds_total = stat_task->length_seconds;
 254                         }
 255                         length = s->seconds_total;
 256                         tmp = &s->server_stream_start;
 257                 }
 258         }
 259         if (stat_task->sa_time_diff_sign > 0)
 260                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 261         else
 262                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 263         if (!s || !s->wns) {
 264                 struct timeval diff;
 265                 tv_diff(now, &sss, &diff);
 266                 seconds = diff.tv_sec + stat_task->offset_seconds;
 267                 goto out;
 268         }
 269         tv_diff(now, &wstime, &wtime);
 270         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 271         seconds = s->offset_seconds;
 272         btr_get_node_start(s->receiver_node->btrn, &rstime);
 273         ret = tv_diff(&rstime, &sss, &rskip);
 274         if (ret > 0) { /* audiod was started in the middle of the stream */
 275                 tv_add(&wtime, &rskip, &sum);
 276                 seconds += sum.tv_sec;
 277         } else
 278                 seconds += wtime.tv_sec;
 279 out:
 280         seconds = PARA_MIN(seconds, length);
 281         seconds = PARA_MAX(seconds, 0);
 282         msg = make_message(
 283                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 284                 s? "" : "~",
 285                 seconds / 60,
 286                 seconds % 60,
 287                 (length - seconds) / 60,
 288                 (length - seconds) % 60,
 289                 length? (seconds * 100 + length / 2) / length : 0,
 290                 length / 60,
 291                 length % 60
 292         );
 293         //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 294         return msg;
 295 empty:
 296         return para_strdup(NULL);
 297 }
 298
 299 static int want_colors(void)
 300 {
 301         if (conf.color_arg == color_arg_no)
 302                 return 0;
 303         if (conf.color_arg == color_arg_yes)
 304                 return 1;
 305         if (conf.logfile_given)
 306                 return 0;
 307         return isatty(STDERR_FILENO);
 308 }
 309
 310 static void parse_config_or_die(void)
 311 {
 312         int ret;
 313         char *config_file;
 314         struct audiod_cmdline_parser_params params = {
 315                 .override = 0,
 316                 .initialize = 0,
 317                 .check_required = 1,
 318                 .check_ambiguity = 0,
 319                 .print_errors = 1
 320         };
 321
 322         if (conf.config_file_given)
 323                 config_file = para_strdup(conf.config_file_arg);
 324         else {
 325                 char *home = para_homedir();
 326                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 327                 free(home);
 328         }
 329         ret = file_exists(config_file);
 330         if (conf.config_file_given && !ret) {
 331                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 332                 goto err;
 333         }
 334         if (ret)
 335                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 336         free(config_file);
 337         daemon_set_loglevel(conf.loglevel_arg);
 338         return;
 339 err:
 340         free(config_file);
 341         exit(EXIT_FAILURE);
 342 }
 343
 344 static void setup_signal_handling(void)
 345 {
 346         sig_task->fd = para_signal_init();
 347         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 348         para_install_sighandler(SIGINT);
 349         para_install_sighandler(SIGTERM);
 350         para_install_sighandler(SIGHUP);
 351         para_sigaction(SIGPIPE, SIG_IGN);
 352 }
 353
 354 static void clear_slot(int slot_num)
 355 {
 356         struct slot_info *s = &slot[slot_num];
 357
 358         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 359         memset(s, 0, sizeof(struct slot_info));
 360         s->format = -1;
 361 }
 362
 363 static void close_receiver(int slot_num)
 364 {
 365         struct slot_info *s = &slot[slot_num];
 366         struct audio_format_info *a;
 367
 368         if (s->format < 0 || !s->receiver_node)
 369                 return;
 370         a = &afi[s->format];
 371         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 372                 audio_formats[s->format], slot_num);
 373         a->receiver->close(s->receiver_node);
 374         btr_free_node(s->receiver_node->btrn);
 375         free(s->receiver_node);
 376         s->receiver_node = NULL;
 377         tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
 378                 &a->restart_barrier);
 379 }
 380
 381 static void writer_cleanup(struct writer_node *wn)
 382 {
 383         struct writer *w;
 384
 385         if (!wn)
 386                 return;
 387         w = writers + wn->writer_num;
 388         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 389         w->close(wn);
 390         btr_free_node(wn->btrn);
 391 }
 392
 393 static void close_writers(struct slot_info *s)
 394 {
 395         struct audio_format_info *a;
 396         int i;
 397
 398         if (s->format < 0)
 399                 return;
 400         assert(s->wns);
 401         a = afi + s->format;
 402         if (a->num_writers == 0)
 403                 writer_cleanup(s->wns);
 404         else {
 405                 for (i = 0; i < a->num_writers; i++)
 406                         writer_cleanup(s->wns + i);
 407         }
 408         free(s->wns);
 409         s->wns = NULL;
 410 }
 411
 412 static void close_filters(struct slot_info *s)
 413 {
 414         int i;
 415         struct audio_format_info *a = afi + s->format;
 416         if (a->num_filters == 0)
 417                 return;
 418         for (i = 0; i < a->num_filters; i++) {
 419                 struct filter_node *fn = s->fns + i;
 420                 struct filter *f;
 421
 422                 if (!fn)
 423                         continue;
 424                 f = filters + fn->filter_num;
 425                 if (f->close)
 426                         f->close(fn);
 427                 btr_free_node(fn->btrn);
 428         }
 429         free(s->fns);
 430         s->fns = NULL;
 431 }
 432
 433 /*
 434  * Whenever a task commits suicide by returning from post_select with t->error
 435  * < 0, it also removes its btr node. We do exactly that to kill a running
 436  * task. Note that the scheduler checks t->error also _before_ each pre/post
 437  * select call, so the victim will never be scheduled again.
 438  */
 439 static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
 440 {
 441         if (t->error < 0)
 442                 return;
 443         t->error = error;
 444         btr_remove_node(btrn);
 445 }
 446
 447 static void kill_all_decoders(int error)
 448 {
 449         int i;
 450
 451         FOR_EACH_SLOT(i) {
 452                 struct slot_info *s = slot + i;
 453                 if (s->format < 0)
 454                         continue;
 455                 if (!s->receiver_node)
 456                         continue;
 457                 kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
 458                                 error);
 459         }
 460 }
 461
 462 static int get_empty_slot(void)
 463 {
 464         int i;
 465         struct slot_info *s;
 466
 467         FOR_EACH_SLOT(i) {
 468                 s = &slot[i];
 469                 if (s->format < 0) {
 470                         clear_slot(i);
 471                         return i;
 472                 }
 473                 if (s->wns || s->receiver_node || s->fns)
 474                         continue;
 475                 clear_slot(i);
 476                 return i;
 477         }
 478         return -E_NO_MORE_SLOTS;
 479 }
 480
 481 static void open_filters(struct slot_info *s)
 482 {
 483         struct audio_format_info *a = afi + s->format;
 484         struct filter_node *fn;
 485         int nf = a->num_filters;
 486         struct btr_node *parent;
 487         int i;
 488
 489         if (nf == 0)
 490                 return;
 491         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 492         assert(s->fns == NULL);
 493         s->fns = para_calloc(nf * sizeof(struct filter_node));
 494         parent = s->receiver_node->btrn;
 495         for (i = 0; i < nf; i++) {
 496                 struct filter *f = filters + a->filter_nums[i];
 497                 fn = s->fns + i;
 498                 fn->filter_num = a->filter_nums[i];
 499                 fn->conf = a->filter_conf[i];
 500                 fn->task.pre_select = f->pre_select;
 501                 fn->task.post_select = f->post_select;
 502
 503                 fn->btrn = btr_new_node(&(struct btr_node_description)
 504                         EMBRACE(.name = f->name, .parent = parent,
 505                                 .handler = f->execute, .context = fn));
 506
 507                 f->open(fn);
 508                 register_task(&fn->task);
 509                 parent = fn->btrn;
 510                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 511                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 512                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 513         }
 514 }
 515
 516 static void open_writers(struct slot_info *s)
 517 {
 518         int i;
 519         struct audio_format_info *a = afi + s->format;
 520         struct writer_node *wn;
 521         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 522
 523         assert(s->wns == NULL);
 524         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 525                 * sizeof(struct writer_node));
 526         PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 527         for (i = 0; i < a->num_writers; i++) {
 528                 wn = s->wns + i;
 529                 wn->conf = a->writer_conf[i];
 530                 wn->writer_num = a->writer_nums[i];
 531                 register_writer_node(wn, parent);
 532         }
 533 }
 534
 535 /* returns slot num on success */
 536 static int open_receiver(int format)
 537 {
 538         struct audio_format_info *a = &afi[format];
 539         struct slot_info *s;
 540         int ret, slot_num;
 541         struct receiver *r = a->receiver;
 542         struct receiver_node *rn;
 543
 544         tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
 545         ret = get_empty_slot();
 546         if (ret < 0)
 547                 return ret;
 548         slot_num = ret;
 549         rn = para_calloc(sizeof(*rn));
 550         rn->receiver = r;
 551         rn->conf = a->receiver_conf;
 552         rn->btrn = btr_new_node(&(struct btr_node_description)
 553                 EMBRACE(.name = r->name, .context = rn));
 554         ret = r->open(rn);
 555         if (ret < 0) {
 556                 btr_free_node(rn->btrn);
 557                 free(rn);
 558                 return ret;
 559         }
 560         s = &slot[slot_num];
 561         s->format = format;
 562         s->receiver_node = rn;
 563         PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
 564                 audio_formats[format], r->name, slot_num);
 565         rn->task.pre_select = r->pre_select;
 566         rn->task.post_select = r->post_select;
 567         sprintf(rn->task.status, "%s receiver node", r->name);
 568         register_task(&rn->task);
 569         return slot_num;
 570 }
 571
 572 static bool receiver_running(void)
 573 {
 574         int i;
 575         long unsigned ss1 = stat_task->server_stream_start.tv_sec;
 576
 577         FOR_EACH_SLOT(i) {
 578                 struct slot_info *s = &slot[i];
 579                 long unsigned ss2 = s->server_stream_start.tv_sec;
 580
 581                 if (!s->receiver_node)
 582                         continue;
 583                 if (s->receiver_node->task.error >= 0)
 584                         return true;
 585                 if (ss1 == ss2)
 586                         return true;
 587         }
 588         return false;
 589 }
 590
 591 /**
 592  * Return the root node of the current buffer tree.
 593  *
 594  * This is only used for stream grabbing.
 595  *
 596  * \return \p NULL if no slot is currently active. If more than one buffer tree
 597  * exists, the node corresponding to the most recently started receiver is
 598  * returned.
 599  */
 600 struct btr_node *audiod_get_btr_root(void)
 601 {
 602         int i, newest_slot = -1;
 603         struct timeval newest_rstime = {0, 0};
 604
 605         FOR_EACH_SLOT(i) {
 606                 struct slot_info *s = &slot[i];
 607                 struct timeval rstime;
 608                 if (!s->receiver_node)
 609                         continue;
 610                 if (s->receiver_node->task.error < 0)
 611                         continue;
 612                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 613                 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
 614                         continue;
 615                 newest_rstime = rstime;
 616                 newest_slot = i;
 617         }
 618         if (newest_slot == -1)
 619                 return NULL;
 620         return slot[newest_slot].receiver_node->btrn;
 621 }
 622
 623 /* whether a new instance of a decoder should be started. */
 624 static bool must_start_decoder(void)
 625 {
 626         int cafn = stat_task->current_audio_format_num;
 627         unsigned vs = stat_task->vss_status;
 628
 629         if (audiod_status != AUDIOD_ON)
 630                 return false;
 631         if (cafn < 0)
 632                 return false;
 633         if (!stat_task->ct)
 634                 return false;
 635         if (vs & VSS_STATUS_FLAG_NEXT)
 636                 return false;
 637         if (!(vs & VSS_STATUS_FLAG_PLAYING))
 638                 return false;
 639         if (receiver_running())
 640                 return false;
 641         if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
 642                 return false;
 643         return true;
 644 }
 645
 646 static unsigned compute_time_diff(const struct timeval *status_time)
 647 {
 648         struct timeval tmp, diff;
 649         static unsigned count;
 650         int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
 651         const struct timeval max_deviation = {0, 500 * 1000};
 652         const int time_smooth = 5;
 653
 654         if (!status_time)
 655                 return count;
 656         sign = tv_diff(status_time, now, &diff);
 657 //              PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
 658 //                      sign, sa_time_diff_sign);
 659         if (!count) {
 660                 sa_time_diff_sign = sign;
 661                 stat_task->sa_time_diff = diff;
 662                 count++;
 663                 goto out;
 664         }
 665         if (count > 5) {
 666                 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
 667                 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
 668                         PARA_WARNING_LOG("time diff jump: %lims\n",
 669                                 s * tv2ms(&tmp));
 670         }
 671         count++;
 672         sa_time_diff_sign = tv_convex_combination(
 673                 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
 674                 count > 10? sign : sign * time_smooth, &diff,
 675                 &tmp);
 676         stat_task->sa_time_diff = tmp;
 677         PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
 678                 sign < 0? "-" : "+",
 679                 tv2ms(&diff),
 680                 sa_time_diff_sign < 0? "-" : "+",
 681                 tv2ms(&stat_task->sa_time_diff)
 682         );
 683 out:
 684         stat_task->sa_time_diff_sign = sa_time_diff_sign;
 685         return count;
 686 }
 687
 688 static int update_item(int itemnum, char *buf)
 689 {
 690         long unsigned sec, usec;
 691
 692         if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
 693                 return 1;
 694         free(stat_item_values[itemnum]);
 695         stat_item_values[itemnum] = para_strdup(buf);
 696         stat_client_write_item(itemnum);
 697         switch (itemnum) {
 698         case SI_STATUS_FLAGS:
 699                 stat_task->vss_status = 0;
 700                 if (strchr(buf, 'N'))
 701                         stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
 702                 if (strchr(buf, 'P'))
 703                         stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
 704                 break;
 705         case SI_OFFSET:
 706                 stat_task->offset_seconds = atoi(buf);
 707                 break;
 708         case SI_SECONDS_TOTAL:
 709                 stat_task->length_seconds = atoi(buf);
 710                 break;
 711         case SI_STREAM_START:
 712                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 713                         stat_task->server_stream_start.tv_sec = sec;
 714                         stat_task->server_stream_start.tv_usec = usec;
 715                 }
 716                 break;
 717         case SI_CURRENT_TIME:
 718                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 719                         struct timeval tv = {sec, usec};
 720                         compute_time_diff(&tv);
 721                 }
 722                 break;
 723         case SI_FORMAT:
 724                 stat_task->current_audio_format_num
 725                         = get_audio_format_num(buf);
 726         }
 727         return 1;
 728 }
 729
 730 static int parse_stream_command(const char *txt, char **cmd)
 731 {
 732         int ret, len;
 733         char *re, *p = strchr(txt, ':');
 734
 735         if (!p)
 736                 return -E_MISSING_COLON;
 737         *cmd = p + 1;
 738         len = p - txt;
 739         re = malloc(len + 1);
 740         strncpy(re, txt, len);
 741         re[len] = '\0';
 742         ret = get_matching_audio_format_nums(re);
 743         free(re);
 744         return ret;
 745 }
 746
 747 static int add_filter(int format, char *cmdline)
 748 {
 749         struct audio_format_info *a = &afi[format];
 750         int filter_num, nf = a->num_filters;
 751         void *cfg;
 752
 753         filter_num = check_filter_arg(cmdline, &cfg);
 754         if (filter_num < 0)
 755                 return filter_num;
 756         a->filter_conf = para_realloc(a->filter_conf,
 757                 (nf + 1) * sizeof(void *));
 758         a->filter_nums = para_realloc(a->filter_nums,
 759                 (nf + 1) * sizeof(unsigned));
 760         a->filter_nums[nf] = filter_num;
 761         a->filter_conf[nf] = cfg;
 762         a->num_filters++;
 763         PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
 764                 filters[filter_num].name);
 765         return filter_num;
 766 }
 767
 768 static int parse_writer_args(void)
 769 {
 770         int i, ret;
 771         char *cmd;
 772         struct audio_format_info *a;
 773
 774         for (i = 0; i < conf.writer_given; i++) {
 775                 void *wconf;
 776                 int j, nw, writer_num, af_mask;
 777
 778                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 779                 if (ret < 0)
 780                         return ret;
 781                 af_mask = ret;
 782                 FOR_EACH_AUDIO_FORMAT(j) {
 783                         a = afi + j;
 784                         if ((af_mask & (1 << j)) == 0) /* no match */
 785                                 continue;
 786                         wconf = check_writer_arg_or_die(cmd, &writer_num);
 787                         nw = a->num_writers;
 788                         a->writer_nums = para_realloc(a->writer_nums, (nw + 1) * sizeof(int));
 789                         a->writer_conf = para_realloc(a->writer_conf, (nw + 1) * sizeof(void *));
 790                         a->writer_nums[nw] = writer_num;
 791                         a->writer_conf[nw] = wconf;
 792                         PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[j],
 793                                 nw, writer_names[writer_num]);
 794                         a->num_writers++;
 795                 }
 796         }
 797         /* Use default writer for audio formats which are not yet set up. */
 798         FOR_EACH_AUDIO_FORMAT(i) {
 799                 struct writer *w = writers + DEFAULT_WRITER;
 800                 a = afi + i;
 801                 if (a->num_writers > 0)
 802                         continue; /* already set up */
 803                 PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats[i],
 804                         writer_names[DEFAULT_WRITER]);
 805                 a->writer_nums = para_malloc(sizeof(int));
 806                 a->writer_nums[0] = DEFAULT_WRITER;
 807                 a->writer_conf = para_malloc(sizeof(void *));
 808                 a->writer_conf[0] = w->parse_config_or_die("");
 809                 a->num_writers = 1;
 810         }
 811         return 1;
 812 }
 813
 814 static int parse_receiver_args(void)
 815 {
 816         int i, ret, receiver_num;
 817         char *cmd = NULL;
 818         struct audio_format_info *a;
 819
 820         for (i = conf.receiver_given - 1; i >= 0; i--) {
 821                 char *arg;
 822                 int j, af_mask;
 823
 824                 ret = parse_stream_command(conf.receiver_arg[i], &arg);
 825                 if (ret < 0)
 826                         goto out;
 827                 af_mask = ret;
 828                 FOR_EACH_AUDIO_FORMAT(j) {
 829                         a = afi + j;
 830                         if ((af_mask & (1 << j)) == 0) /* no match */
 831                                 continue;
 832                         /*
 833                          * If multiple receivers are given for this audio format, the
 834                          * last one wins and we have to free the previous receiver
 835                          * config here. Since we are iterating backwards, the winning
 836                          * receiver arg is in fact the first one given.
 837                          */
 838                         if (a->receiver_conf)
 839                                 a->receiver->free_config(a->receiver_conf);
 840                         a->receiver_conf = check_receiver_arg(arg, &receiver_num);
 841                         ret = -E_RECV_SYNTAX;
 842                         if (!a->receiver_conf)
 843                                 goto out;
 844                         a->receiver = receivers + receiver_num;
 845                 }
 846         }
 847         /*
 848          * Use the first available receiver with no arguments for those audio
 849          * formats for which no receiver was specified.
 850          */
 851         cmd = para_strdup(receivers[0].name);
 852         FOR_EACH_AUDIO_FORMAT(i) {
 853                 a = &afi[i];
 854                 if (a->receiver_conf)
 855                         continue;
 856                 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
 857                 if (!a->receiver_conf)
 858                         return -E_RECV_SYNTAX;
 859                 a->receiver = &receivers[receiver_num];
 860         }
 861         FOR_EACH_AUDIO_FORMAT(i) {
 862                 a = afi + i;
 863                 PARA_INFO_LOG("receiving %s streams via %s receiver\n",
 864                         audio_formats[i], a->receiver->name);
 865         }
 866         ret = 1;
 867 out:
 868         free(cmd);
 869         return ret;
 870 }
 871
 872 static int init_default_filters(void)
 873 {
 874         int i, ret = 1;
 875
 876         FOR_EACH_AUDIO_FORMAT(i) {
 877                 struct audio_format_info *a = &afi[i];
 878                 char *tmp;
 879                 int j;
 880
 881                 if (a->num_filters)
 882                         continue; /* no default -- nothing to to */
 883                 /*
 884                  * udp and dccp streams are fec-encoded, so add fecdec as the
 885                  * first filter.
 886                  */
 887                 if (strcmp(afi[i].receiver->name, "udp") == 0 ||
 888                                 strcmp(afi[i].receiver->name, "dccp") == 0) {
 889                         tmp = para_strdup("fecdec");
 890                         add_filter(i, tmp);
 891                         free(tmp);
 892                         if (ret < 0)
 893                                 goto out;
 894                 }
 895                 /* add "dec" to audio format name */
 896                 tmp = make_message("%sdec", audio_formats[i]);
 897                 for (j = 0; filters[j].name; j++)
 898                         if (!strcmp(tmp, filters[j].name))
 899                                 break;
 900                 free(tmp);
 901                 ret = -E_UNSUPPORTED_FILTER;
 902                 if (!filters[j].name)
 903                         goto out;
 904                 tmp = para_strdup(filters[j].name);
 905                 ret = add_filter(i, tmp);
 906                 free(tmp);
 907                 if (ret < 0)
 908                         goto out;
 909                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 910                         filters[j].name);
 911         }
 912 out:
 913         return ret;
 914 }
 915
 916 static int parse_filter_args(void)
 917 {
 918         int i, j, ret, af_mask;
 919
 920         if (!conf.no_default_filters_given)
 921                 return init_default_filters();
 922         for (i = 0; i < conf.filter_given; i++) {
 923                 char *arg;
 924                 ret = parse_stream_command(conf.filter_arg[i], &arg);
 925                 if (ret < 0)
 926                         goto out;
 927                 af_mask = ret;
 928                 FOR_EACH_AUDIO_FORMAT(j) {
 929                         if ((af_mask & (1 << j)) == 0) /* no match */
 930                                 continue;
 931                         ret = add_filter(j, arg);
 932                         if (ret < 0)
 933                                 goto out;
 934                 }
 935         }
 936         ret = init_default_filters(); /* use default values for the rest */
 937 out:
 938         return ret;
 939 }
 940
 941 static int parse_stream_args(void)
 942 {
 943         int ret;
 944
 945         ret = parse_receiver_args();
 946         if (ret < 0)
 947                 return ret;
 948         ret = parse_filter_args();
 949         if (ret < 0)
 950                 return ret;
 951         ret = parse_writer_args();
 952         if (ret < 0)
 953                 return ret;
 954         return 1;
 955 }
 956
 957 /* does not unlink socket on errors */
 958 static int audiod_get_socket(void)
 959 {
 960         struct sockaddr_un unix_addr;
 961         int ret, fd;
 962
 963         if (conf.socket_given)
 964                 socket_name = para_strdup(conf.socket_arg);
 965         else {
 966                 char *hn = para_hostname();
 967                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 968                         hn);
 969                 free(hn);
 970         }
 971         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 972         if (conf.force_given)
 973                 unlink(socket_name);
 974         ret = create_local_socket(socket_name, &unix_addr,
 975                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 976         if (ret < 0)
 977                 goto err;
 978         fd = ret;
 979         if (listen(fd , 5) < 0) {
 980                 ret = -ERRNO_TO_PARA_ERROR(errno);
 981                 goto err;
 982         }
 983         ret = mark_fd_nonblocking(fd);
 984         if (ret < 0)
 985                 goto err;
 986         return fd;
 987 err:
 988         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 989         exit(EXIT_FAILURE);
 990 }
 991
 992 static void signal_pre_select(struct sched *s, struct task *t)
 993 {
 994         struct signal_task *st = container_of(t, struct signal_task, task);
 995         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 996 }
 997
 998 static void signal_post_select(struct sched *s, __a_unused struct task *t)
 999 {
1000         int signum;
1001
1002         signum = para_next_signal(&s->rfds);
1003         switch (signum) {
1004         case SIGINT:
1005         case SIGTERM:
1006         case SIGHUP:
1007                 PARA_EMERG_LOG("terminating on signal %d\n", signum);
1008                 clean_exit(EXIT_FAILURE, "caught deadly signal");
1009         }
1010 }
1011
1012 static void signal_setup_default(struct signal_task *st)
1013 {
1014         st->task.pre_select = signal_pre_select;
1015         st->task.post_select = signal_post_select;
1016         sprintf(st->task.status, "signal task");
1017 }
1018
1019 static void command_pre_select(struct sched *s, struct task *t)
1020 {
1021         struct command_task *ct = container_of(t, struct command_task, task);
1022         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1023 }
1024
1025 static void command_post_select(struct sched *s, struct task *t)
1026 {
1027         int ret;
1028         struct command_task *ct = container_of(t, struct command_task, task);
1029         static struct timeval last_status_dump;
1030         struct timeval tmp, delay = {0, 500 * 1000};
1031
1032         tv_add(&last_status_dump, &delay, &tmp);
1033         if (tv_diff(&tmp, now, NULL) < 0) {
1034                 audiod_status_dump();
1035                 last_status_dump = *now;
1036         }
1037
1038         ret = handle_connect(ct->fd, &s->rfds);
1039         if (ret < 0)
1040                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1041         audiod_status_dump();
1042 }
1043
1044 static void init_command_task(struct command_task *ct)
1045 {
1046         ct->task.pre_select = command_pre_select;
1047         ct->task.post_select = command_post_select;
1048         ct->task.error = 0;
1049         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1050         sprintf(ct->task.status, "command task");
1051 }
1052
1053 static void close_stat_pipe(void)
1054 {
1055         if (!stat_task->ct)
1056                 return;
1057         client_close(stat_task->ct);
1058         stat_task->ct = NULL;
1059         clear_and_dump_items();
1060         stat_task->length_seconds = 0;
1061         stat_task->offset_seconds = 0;
1062         stat_task->vss_status = 0;
1063         stat_task->current_audio_format_num = -1;
1064         audiod_status_dump();
1065 }
1066
1067 /**
1068  * close the connection to para_server and exit
1069  *
1070  * \param status the exit status which is passed to exit(3)
1071  * \param msg the log message
1072  *
1073  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1074  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1075  * EXIT_FAILURE.
1076  *
1077  * \sa exit(3)
1078  */
1079 void __noreturn clean_exit(int status, const char *msg)
1080 {
1081         PARA_EMERG_LOG("%s\n", msg);
1082         if (socket_name)
1083                 unlink(socket_name);
1084         close_stat_pipe();
1085         exit(status);
1086 }
1087
1088 /* avoid busy loop if server is down */
1089 static void set_stat_task_restart_barrier(unsigned seconds)
1090 {
1091         struct timeval delay = {seconds, 0};
1092         tv_add(now, &delay, &stat_task->restart_barrier);
1093 }
1094
1095 static void try_to_close_slot(int slot_num)
1096 {
1097         struct slot_info *s = &slot[slot_num];
1098         struct audio_format_info *a = afi + s->format;
1099         int i;
1100
1101         if (s->format < 0)
1102                 return;
1103         if (s->receiver_node && s->receiver_node->task.error >= 0)
1104                 return;
1105         for (i = 0; i < a->num_filters; i++)
1106                 if (s->fns && s->fns[i].task.error >= 0)
1107                         return;
1108         if (a->num_writers > 0) {
1109                 for (i = 0; i < a->num_writers; i++)
1110                         if (s->wns && s->wns[i].task.error >= 0)
1111                                 return;
1112         } else {
1113                 if (s->wns && s->wns[0].task.error >= 0)
1114                         return;
1115         }
1116         PARA_INFO_LOG("closing slot %d\n", slot_num);
1117         close_writers(s);
1118         close_filters(s);
1119         close_receiver(slot_num);
1120         clear_slot(slot_num);
1121 }
1122
1123 /*
1124  * Check if any receivers/filters/writers need to be started and do so if
1125  * necessary.
1126  */
1127 static void start_stop_decoders(void)
1128 {
1129         int i, ret;
1130         struct slot_info *sl;
1131         struct audio_format_info *a;
1132
1133         FOR_EACH_SLOT(i)
1134                 try_to_close_slot(i);
1135         if (audiod_status != AUDIOD_ON ||
1136                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1137                 return kill_all_decoders(-E_NOT_PLAYING);
1138         if (!must_start_decoder())
1139                 return;
1140         ret = open_receiver(stat_task->current_audio_format_num);
1141         if (ret < 0) {
1142                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1143                 return;
1144         }
1145         sl = slot + ret;
1146         a = afi + sl->format;
1147         if (a->num_filters)
1148                 open_filters(sl);
1149         open_writers(sl);
1150         activate_grab_clients();
1151         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1152 }
1153
1154 static void status_pre_select(struct sched *s, struct task *t)
1155 {
1156         struct status_task *st = container_of(t, struct status_task, task);
1157         int ret, cafn = stat_task->current_audio_format_num;
1158
1159         if (must_start_decoder())
1160                 goto min_delay;
1161         ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
1162         if (ret > 0)
1163                 goto min_delay;
1164         if (st->ct && audiod_status == AUDIOD_OFF)
1165                 goto min_delay;
1166         if (!st->ct && audiod_status != AUDIOD_OFF)
1167                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1168         if (cafn >= 0)
1169                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1170         /*
1171          * If para_server is playing we'd like to have a smooth time display
1172          * even if we are running in standby mode. So we request a timeout that
1173          * expires at the next full second.
1174          */
1175         if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
1176                 sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
1177         return;
1178 min_delay:
1179         sched_min_delay(s);
1180 }
1181
1182 /* restart the client task if necessary */
1183 static void status_post_select(__a_unused struct sched *s, struct task *t)
1184 {
1185         struct status_task *st = container_of(t, struct status_task, task);
1186
1187         if (audiod_status == AUDIOD_OFF) {
1188                 if (!st->ct)
1189                         goto out;
1190                 if (st->ct->task.error >= 0) {
1191                         kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
1192                         goto out;
1193                 }
1194                 if (st->ct->task.error >= 0)
1195                         goto out;
1196                 close_stat_pipe();
1197                 st->clock_diff_count = conf.clock_diff_count_arg;
1198                 goto out;
1199         }
1200         if (st->ct) {
1201                 char *buf;
1202                 size_t sz;
1203                 int ret;
1204                 if (st->ct->task.error < 0) {
1205                         if (st->ct->task.error >= 0)
1206                                 goto out;
1207                         close_stat_pipe();
1208                         goto out;
1209                 }
1210                 if (st->ct->status != CL_RECEIVING)
1211                         goto out;
1212                 ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
1213                 if (ret <= 0) {
1214                         struct timeval diff;
1215                         tv_diff(now, &st->last_status_read, &diff);
1216                         if (diff.tv_sec > 61)
1217                                 kill_btrn(st->ct->btrn, &st->ct->task,
1218                                         -E_STATUS_TIMEOUT);
1219                         goto out;
1220                 }
1221                 btr_merge(st->btrn, st->min_iqs);
1222                 sz = btr_next_buffer(st->btrn, &buf);
1223                 ret = for_each_stat_item(buf, sz, update_item);
1224                 if (ret < 0) {
1225                         kill_btrn(st->ct->btrn, &st->ct->task, ret);
1226                         goto out;
1227                 }
1228                 if (sz != ret) {
1229                         btr_consume(st->btrn, sz - ret);
1230                         st->last_status_read = *now;
1231                         st->min_iqs = 0;
1232                 } else /* current status item crosses buffers */
1233                         st->min_iqs = sz + 1;
1234                 goto out;
1235         }
1236         btr_drain(st->btrn);
1237         st->current_audio_format_num = -1;
1238         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1239                 goto out;
1240         if (st->clock_diff_count) { /* get status only one time */
1241                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1242                 int argc = 5;
1243                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1244                 st->clock_diff_count--;
1245                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1246                 set_stat_task_restart_barrier(2);
1247
1248         } else {
1249                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1250                 int argc = 4;
1251                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1252                 set_stat_task_restart_barrier(5);
1253         }
1254         free(stat_item_values[SI_BASENAME]);
1255         stat_item_values[SI_BASENAME] = para_strdup(
1256                 "no connection to para_server");
1257         stat_client_write_item(SI_BASENAME);
1258         st->last_status_read = *now;
1259 out:
1260         start_stop_decoders();
1261 }
1262
1263 static void init_status_task(struct status_task *st)
1264 {
1265         memset(st, 0, sizeof(struct status_task));
1266         st->task.pre_select = status_pre_select;
1267         st->task.post_select = status_post_select;
1268         st->sa_time_diff_sign = 1;
1269         st->clock_diff_count = conf.clock_diff_count_arg;
1270         st->current_audio_format_num = -1;
1271         sprintf(st->task.status, "stat");
1272         st->btrn = btr_new_node(&(struct btr_node_description)
1273                 EMBRACE(.name = "stat"));
1274 }
1275
1276 static void set_initial_status(void)
1277 {
1278         audiod_status = AUDIOD_ON;
1279         if (!conf.mode_given)
1280                 return;
1281         if (!strcmp(conf.mode_arg, "sb")) {
1282                 audiod_status = AUDIOD_STANDBY;
1283                 return;
1284         }
1285         if (!strcmp(conf.mode_arg, "off")) {
1286                 audiod_status = AUDIOD_OFF;
1287                 return;
1288         }
1289         if (strcmp(conf.mode_arg, "on"))
1290                 PARA_WARNING_LOG("invalid mode\n");
1291 }
1292
1293 __noreturn static void print_help_and_die(void)
1294 {
1295         int d = conf.detailed_help_given;
1296         const char **p = d? audiod_args_info_detailed_help
1297                 : audiod_args_info_help;
1298
1299         printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1300                 AUDIOD_CMDLINE_PARSER_VERSION);
1301         printf_or_die("%s\n\n", audiod_args_info_usage);
1302         for (; *p; p++)
1303                 printf_or_die("%s\n", *p);
1304         print_receiver_helps(d);
1305         print_filter_helps(d);
1306         print_writer_helps(d);
1307         exit(0);
1308 }
1309
1310 static void init_colors_or_die(void)
1311 {
1312         int i;
1313
1314         if (!want_colors())
1315                 return;
1316         daemon_set_default_log_colors();
1317         daemon_set_flag(DF_COLOR_LOG);
1318         for (i = 0; i < conf.log_color_given; i++)
1319                 daemon_set_log_color_or_die(conf.log_color_arg[i]);
1320 }
1321
1322 /**
1323  * the main function of para_audiod
1324  *
1325  * \param argc usual argument count
1326  * \param argv usual argument vector
1327  *
1328  * \return EXIT_SUCCESS or EXIT_FAILURE
1329  *
1330  * \sa para_audiod(1)
1331  * */
1332 int main(int argc, char *argv[])
1333 {
1334         int ret, i;
1335         static struct sched s;
1336         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1337         struct audiod_cmdline_parser_params params = {
1338                 .override = 0,
1339                 .initialize = 1,
1340                 .check_required = 0,
1341                 .check_ambiguity = 0,
1342                 .print_errors = 1
1343         };
1344
1345         valid_fd_012();
1346         if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1347                 exit(EXIT_FAILURE);
1348         HANDLE_VERSION_FLAG("audiod", conf);
1349         /* init receivers/filters/writers early to make help work */
1350         recv_init();
1351         filter_init();
1352         writer_init();
1353         if (conf.help_given || conf.detailed_help_given)
1354                 print_help_and_die();
1355         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1356         parse_config_or_die();
1357         init_colors_or_die();
1358         init_random_seed_or_die();
1359         daemon_set_flag(DF_LOG_TIME);
1360         daemon_set_flag(DF_LOG_HOSTNAME);
1361         daemon_set_flag(DF_LOG_LL);
1362         if (conf.log_timing_given)
1363                 daemon_set_flag(DF_LOG_TIMING);
1364         if (conf.logfile_given) {
1365                 daemon_set_logfile(conf.logfile_arg);
1366                 daemon_open_log_or_die();
1367         }
1368         ret = parse_stream_args();
1369         if (ret < 0) {
1370                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1371                 exit(EXIT_FAILURE);
1372         }
1373         log_welcome("para_audiod");
1374         set_server_start_time(NULL);
1375         set_initial_status();
1376         FOR_EACH_SLOT(i)
1377                 clear_slot(i);
1378         setup_signal_handling();
1379         signal_setup_default(sig_task);
1380
1381         init_status_task(stat_task);
1382         init_command_task(cmd_task);
1383
1384         if (conf.daemon_given)
1385                 daemonize(false /* parent exits immediately */);
1386
1387         register_task(&sig_task->task);
1388         register_task(&cmd_task->task);
1389         register_task(&stat_task->task);
1390         s.default_timeout.tv_sec = 2;
1391         s.default_timeout.tv_usec = 999 * 1000;
1392         ret = schedule(&s);
1393
1394         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1395         return EXIT_FAILURE;
1396 }