audiod.c

   1 /*
   2  * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file audiod.c the paraslash's audio daemon */
   8 #include <regex.h>
   9 #include <sys/types.h>
  10 #include <dirent.h>
  11 #include <signal.h>
  12 #include <openssl/rc4.h>
  13 #include <stdbool.h>
  14
  15 #include "para.h"
  16 #include "error.h"
  17 #include "crypt.h"
  18 #include "audiod.cmdline.h"
  19 #include "list.h"
  20 #include "sched.h"
  21 #include "ggo.h"
  22 #include "recv.h"
  23 #include "buffer_tree.h"
  24 #include "filter.h"
  25 #include "grab_client.h"
  26 #include "client.cmdline.h"
  27 #include "client.h"
  28 #include "audiod.h"
  29 #include "net.h"
  30 #include "daemon.h"
  31 #include "string.h"
  32 #include "fd.h"
  33 #include "write.h"
  34 #include "write_common.h"
  35 #include "signal.h"
  36
  37 /** define the array of error lists needed by para_audiod */
  38 INIT_AUDIOD_ERRLISTS;
  39 /** define the array containing all supported audio formats */
  40 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
  41
  42 /** Defines how audiod handles one supported audio format. */
  43 struct audio_format_info {
  44         /** pointer to the receiver for this audio format */
  45         struct receiver *receiver;
  46         /** the receiver configuration */
  47         void *receiver_conf;
  48         /** the number of filters that should be activated for this audio format */
  49         unsigned int num_filters;
  50         /** Array of filter numbers to be activated. */
  51         unsigned *filter_nums;
  52         /** Pointer to the array of filter configurations. */
  53         void **filter_conf;
  54         /** the number of filters that should be activated for this audio format */
  55         unsigned int num_writers;
  56         /** Array of writer numbers to be activated. */
  57         int *writer_nums;
  58         /** pointer to the array of writer configurations */
  59         void **writer_conf;
  60         /** do not start receiver/filters/writer before this time */
  61         struct timeval restart_barrier;
  62 };
  63
  64 /**
  65  * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
  66  * be associated with a receiver/filter/writer triple. This array holds all
  67  * information on the status of these slots.
  68  *
  69  * \sa struct slot_info
  70  * */
  71 struct slot_info slot[MAX_STREAM_SLOTS];
  72
  73 /** The vss status flags audiod is interested in. */
  74 enum vss_status_flags {
  75         /** Whether the 'N' flag is set. */
  76         VSS_STATUS_FLAG_NEXT = 1,
  77         /** The 'P' flag is set. */
  78         VSS_STATUS_FLAG_PLAYING = 2,
  79 };
  80
  81 /**
  82  * The task for obtaining para_server's status (para_client stat).
  83  *
  84  * \sa struct task, struct sched.
  85  */
  86 struct status_task {
  87         /** The associated task structure of audiod. */
  88         struct task task;
  89         /** Client data associated with the stat task. */
  90         struct client_task *ct;
  91         /** Do not restart client command until this time. */
  92         struct timeval restart_barrier;
  93         /** Last time we received status data from para_server. */
  94         struct timeval last_status_read;
  95         /** The offset value announced by para_server. */
  96         int offset_seconds;
  97         /** The length of the current audio file as announced by para_server. */
  98         int length_seconds;
  99         /** The start of the current stream from the view of para_server. */
 100         struct timeval server_stream_start;
 101         /** The average time deviation between para_server and para_audiod. */
 102         struct timeval sa_time_diff;
 103         /** Whether client time is ahead of server time. */
 104         int sa_time_diff_sign;
 105         /** The 'P' and the 'N' flags as announced by para_server. */
 106         enum vss_status_flags vss_status;
 107         /** Number of times the clock difference is to be checked. */
 108         unsigned clock_diff_count;
 109         /** When to start the next check for clock difference. */
 110         struct timeval clock_diff_barrier;
 111         /** Number of the audio format as announced by para_server. */
 112         int current_audio_format_num;
 113         /* The status task btrn is the child of the client task. */
 114         struct btr_node *btrn;
 115 };
 116
 117 /** The array of status items sent by para_server. */
 118 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 119
 120 /**
 121  * the current mode of operation of which can be changed by the on/off/cycle
 122  * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
 123  */
 124 int audiod_status = AUDIOD_ON;
 125
 126 /**
 127  * the gengetopt args_info struct that holds information on all command line
 128  * arguments
 129  */
 130 struct audiod_args_info conf;
 131
 132 static char *socket_name;
 133 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 134
 135 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
 136
 137 static struct status_task status_task_struct;
 138
 139 /**
 140  * the task that calls the status command of para_server
 141  *
 142  * \sa struct status_task
 143  */
 144 static struct status_task *stat_task = &status_task_struct;
 145
 146 /**
 147  * the task for handling audiod commands
 148  *
 149  * \sa struct task, struct sched
 150  */
 151 struct command_task {
 152         /** the local listening socket */
 153         int fd;
 154         /** the associated task structure */
 155         struct task task;
 156 };
 157
 158 /** iterate over all supported audio formats */
 159 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 160
 161 /**
 162  * Get the audio format number.
 163  *
 164  * \param name The name of the audio format.
 165  *
 166  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
 167  * \a name is not a supported audio format.
 168  */
 169 int get_audio_format_num(const char *name)
 170 {
 171         int i;
 172
 173         while (para_isspace(*name))
 174                 name++;
 175         FOR_EACH_AUDIO_FORMAT(i)
 176                 if (!strcmp(name, audio_formats[i]))
 177                         return i;
 178         return -E_UNSUPPORTED_AUDIO_FORMAT;
 179 }
 180
 181 /**
 182  * Compute the play time based on information of the given slot.
 183  *
 184  * \param slot_num The slot number (negative means: no slot).
 185  *
 186  * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
 187  * from the status items received from para_server and the start time of the
 188  * (first) writer of the given slot.
 189  *
 190  * It has to to take into account that probably the stream was not started at
 191  * the beginning of the file, that the clock between the server and the client
 192  * host may differ and that playback of the stream was delayed, e.g. because
 193  * the prebuffer filter is used in the filter chain of the given slot.
 194  *
 195  * If no writer is active in the given slot, or \a slot_num is negative
 196  * (indicating that para_audiod runs in standby mode), an approximation based
 197  * only on the status items is computed and the returned string is prefixed
 198  * with "~".
 199  *
 200  * \return A string that must be freed by the caller.
 201  */
 202 char *get_time_string(int slot_num)
 203 {
 204         int ret, seconds = 0, length;
 205         struct timeval *tmp, sum, sss, /* server stream start */
 206                 rstime, /* receiver start time */
 207                 wstime, /* writer start time */
 208                 wtime, /* now - writer start */
 209                 rskip; /* receiver start - sss */
 210         struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
 211         char *msg;
 212
 213         if (audiod_status == AUDIOD_OFF)
 214                 goto empty;
 215         if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
 216                 if (stat_task->length_seconds) /* paused */
 217                         return NULL;
 218                 goto empty; /* stopped */
 219         }
 220         if (audiod_status == AUDIOD_ON && !s)
 221                 goto empty;
 222         /*
 223          * Valid status items and playing, set length and tmp to the stream
 224          * start. We use the slot info and fall back to the info from current
 225          * status items if no slot info is available.
 226          */
 227         length = stat_task->length_seconds;
 228         tmp = &stat_task->server_stream_start;
 229         if (s && s->wns) { /* writer active in this slot */
 230                 btr_get_node_start(s->wns[0].btrn, &wstime);
 231                 if (wstime.tv_sec != 0) { /* writer wrote something */
 232                         if (s->server_stream_start.tv_sec == 0) {
 233                                 /* copy status info to slot */
 234                                 s->server_stream_start = stat_task->server_stream_start;
 235                                 s->offset_seconds = stat_task->offset_seconds;
 236                                 s->seconds_total = stat_task->length_seconds;
 237                         }
 238                         length = s->seconds_total;
 239                         tmp = &s->server_stream_start;
 240                 }
 241         }
 242         if (stat_task->sa_time_diff_sign > 0)
 243                 tv_diff(tmp, &stat_task->sa_time_diff, &sss);
 244         else
 245                 tv_add(tmp, &stat_task->sa_time_diff, &sss);
 246         if (!s || !s->wns) {
 247                 struct timeval diff;
 248                 tv_diff(now, &sss, &diff);
 249                 seconds = diff.tv_sec + stat_task->offset_seconds;
 250                 goto out;
 251         }
 252         tv_diff(now, &wstime, &wtime);
 253         //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
 254         seconds = s->offset_seconds;
 255         btr_get_node_start(s->receiver_node->btrn, &rstime);
 256         ret = tv_diff(&rstime, &sss, &rskip);
 257         if (ret > 0) { /* audiod was started in the middle of the stream */
 258                 tv_add(&wtime, &rskip, &sum);
 259                 seconds += sum.tv_sec;
 260         } else
 261                 seconds += wtime.tv_sec;
 262 out:
 263         seconds = PARA_MIN(seconds, length);
 264         seconds = PARA_MAX(seconds, 0);
 265         msg = make_message(
 266                 "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
 267                 s? "" : "~",
 268                 seconds / 60,
 269                 seconds % 60,
 270                 (length - seconds) / 60,
 271                 (length - seconds) % 60,
 272                 length? (seconds * 100 + length / 2) / length : 0,
 273                 length / 60,
 274                 length % 60
 275         );
 276         PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
 277         return msg;
 278 empty:
 279         return para_strdup(NULL);
 280 }
 281
 282 static int want_colors(void)
 283 {
 284         if (conf.color_arg == color_arg_no)
 285                 return 0;
 286         if (conf.color_arg == color_arg_yes)
 287                 return 1;
 288         if (conf.logfile_given)
 289                 return 0;
 290         return isatty(STDERR_FILENO);
 291 }
 292
 293 static void parse_config_or_die(void)
 294 {
 295         int ret;
 296         char *config_file;
 297         struct audiod_cmdline_parser_params params = {
 298                 .override = 0,
 299                 .initialize = 0,
 300                 .check_required = 1,
 301                 .check_ambiguity = 0,
 302                 .print_errors = 1
 303         };
 304
 305         if (conf.config_file_given)
 306                 config_file = para_strdup(conf.config_file_arg);
 307         else {
 308                 char *home = para_homedir();
 309                 config_file = make_message("%s/.paraslash/audiod.conf", home);
 310                 free(home);
 311         }
 312         ret = file_exists(config_file);
 313         if (conf.config_file_given && !ret) {
 314                 PARA_EMERG_LOG("can not read config file %s\n", config_file);
 315                 goto err;
 316         }
 317         if (ret)
 318                 audiod_cmdline_parser_config_file(config_file, &conf, &params);
 319         free(config_file);
 320         daemon_set_loglevel(conf.loglevel_arg);
 321         return;
 322 err:
 323         free(config_file);
 324         exit(EXIT_FAILURE);
 325 }
 326
 327 static void setup_signal_handling(void)
 328 {
 329         sig_task->fd = para_signal_init();
 330         PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
 331         para_install_sighandler(SIGINT);
 332         para_install_sighandler(SIGTERM);
 333         para_install_sighandler(SIGHUP);
 334         para_sigaction(SIGPIPE, SIG_IGN);
 335 }
 336
 337 static void clear_slot(int slot_num)
 338 {
 339         struct slot_info *s = &slot[slot_num];
 340
 341         PARA_INFO_LOG("clearing slot %d\n", slot_num);
 342         memset(s, 0, sizeof(struct slot_info));
 343         s->format = -1;
 344 }
 345
 346 static void close_receiver(int slot_num)
 347 {
 348         struct slot_info *s = &slot[slot_num];
 349         struct audio_format_info *a;
 350
 351         if (s->format < 0 || !s->receiver_node)
 352                 return;
 353         a = &afi[s->format];
 354         PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
 355                 audio_formats[s->format], slot_num);
 356         a->receiver->close(s->receiver_node);
 357         btr_free_node(s->receiver_node->btrn);
 358         free(s->receiver_node);
 359         s->receiver_node = NULL;
 360 }
 361
 362 static void writer_cleanup(struct writer_node *wn)
 363 {
 364         struct writer *w;
 365
 366         if (!wn)
 367                 return;
 368         w = writers + wn->writer_num;
 369         PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
 370         w->close(wn);
 371         btr_free_node(wn->btrn);
 372 }
 373
 374 static void close_writers(struct slot_info *s)
 375 {
 376         struct audio_format_info *a;
 377         int i;
 378
 379         if (s->format < 0)
 380                 return;
 381         assert(s->wns);
 382         a = afi + s->format;
 383         if (a->num_writers == 0)
 384                 writer_cleanup(s->wns);
 385         else {
 386                 for (i = 0; i < a->num_writers; i++)
 387                         writer_cleanup(s->wns + i);
 388         }
 389         free(s->wns);
 390         s->wns = NULL;
 391 }
 392
 393 static void close_filters(struct slot_info *s)
 394 {
 395         int i;
 396         struct audio_format_info *a = afi + s->format;
 397         if (a->num_filters == 0)
 398                 return;
 399         for (i = 0; i < a->num_filters; i++) {
 400                 struct filter_node *fn = s->fns + i;
 401                 struct filter *f;
 402
 403                 if (!fn)
 404                         continue;
 405                 f = filters + fn->filter_num;
 406                 if (f->close)
 407                         f->close(fn);
 408                 btr_free_node(fn->btrn);
 409         }
 410         free(s->fns);
 411         s->fns = NULL;
 412 }
 413
 414 /*
 415  * Whenever a task commits suicide by returning from post_select with t->error
 416  * < 0, it also removes its btr node. We do exactly that to kill a running
 417  * task. Note that the scheduler checks t->error also _before_ each pre/post
 418  * select call, so the victim will never be scheduled again.
 419  */
 420 static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
 421 {
 422         if (t->error < 0)
 423                 return;
 424         t->error = error;
 425         btr_remove_node(btrn);
 426 }
 427
 428 static void kill_all_decoders(int error)
 429 {
 430         int i, j;
 431
 432         FOR_EACH_SLOT(i) {
 433                 struct slot_info *s = &slot[i];
 434                 struct audio_format_info *a;
 435                 if (s->format < 0)
 436                         continue;
 437                 a = afi + s->format;
 438                 if (s->wns)
 439                         for (j = 0; j < a->num_writers; j++)
 440                                 kill_btrn(s->wns[j].btrn, &s->wns[j].task, error);
 441                 if (s->fns)
 442                         for (j = 0; j < a->num_writers; j++)
 443                                 kill_btrn(s->fns[j].btrn, &s->wns[j].task, error);
 444                 if (s->receiver_node)
 445                         kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
 446                                 error);
 447         }
 448 }
 449
 450 static int get_empty_slot(void)
 451 {
 452         int i;
 453         struct slot_info *s;
 454
 455         FOR_EACH_SLOT(i) {
 456                 s = &slot[i];
 457                 if (s->format < 0) {
 458                         clear_slot(i);
 459                         return i;
 460                 }
 461                 if (s->wns || s->receiver_node || s->fns)
 462                         continue;
 463                 clear_slot(i);
 464                 return i;
 465         }
 466         return -E_NO_MORE_SLOTS;
 467 }
 468
 469 /**
 470  * get the number of filters
 471  *
 472  * \param audio_format_num the number identifying the audio format
 473  *
 474  * \return the number of filters for the given audio format
 475  *
 476  * \sa struct filter;
 477  */
 478 int num_filters(int audio_format_num)
 479 {
 480         return afi[audio_format_num].num_filters;
 481 }
 482
 483 static void open_filters(struct slot_info *s)
 484 {
 485         struct audio_format_info *a = afi + s->format;
 486         struct filter_node *fn;
 487         int nf = a->num_filters;
 488         struct btr_node *parent;
 489         int i;
 490
 491         if (nf == 0)
 492                 return;
 493         PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
 494         assert(s->fns == NULL);
 495         s->fns = para_calloc(nf * sizeof(struct filter_node));
 496         parent = s->receiver_node->btrn;
 497         for (i = 0; i < nf; i++) {
 498                 struct filter *f = filters + a->filter_nums[i];
 499                 fn = s->fns + i;
 500                 fn->filter_num = a->filter_nums[i];
 501                 fn->conf = a->filter_conf[i];
 502                 fn->task.pre_select = f->pre_select;
 503                 fn->task.post_select = f->post_select;
 504
 505                 fn->btrn = btr_new_node(&(struct btr_node_description)
 506                         EMBRACE(.name = f->name, .parent = parent,
 507                                 .handler = f->execute, .context = fn));
 508
 509                 f->open(fn);
 510                 register_task(&fn->task);
 511                 parent = fn->btrn;
 512                 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
 513                         audio_formats[s->format], i,  nf, f->name, (int)(s - slot));
 514                 sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
 515         }
 516 }
 517
 518 static void open_writers(struct slot_info *s)
 519 {
 520         int i;
 521         struct audio_format_info *a = afi + s->format;
 522         struct writer_node *wn;
 523         struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
 524
 525         assert(s->wns == NULL);
 526         s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
 527                 * sizeof(struct writer_node));
 528         if (a->num_writers == 0)
 529                 setup_writer_node(NULL, parent, s->wns);
 530         else {
 531                 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
 532                 for (i = 0; i < a->num_writers; i++) {
 533                         wn = s->wns + i;
 534                         wn->conf = a->writer_conf[i];
 535                         wn->writer_num = a->writer_nums[i];
 536                         register_writer_node(wn, parent);
 537                 }
 538         }
 539 }
 540
 541 /* returns slot num on success */
 542 static int open_receiver(int format)
 543 {
 544         struct audio_format_info *a = &afi[format];
 545         struct slot_info *s;
 546         int ret, slot_num;
 547         struct receiver *r = a->receiver;
 548         struct receiver_node *rn;
 549
 550         tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
 551         ret = get_empty_slot();
 552         if (ret < 0)
 553                 return ret;
 554         slot_num = ret;
 555         rn = para_calloc(sizeof(*rn));
 556         rn->receiver = r;
 557         rn->conf = a->receiver_conf;
 558         rn->btrn = btr_new_node(&(struct btr_node_description)
 559                 EMBRACE(.name = r->name, .context = rn));
 560         ret = r->open(rn);
 561         if (ret < 0) {
 562                 btr_free_node(rn->btrn);
 563                 free(rn);
 564                 return ret;
 565         }
 566         s = &slot[slot_num];
 567         s->format = format;
 568         s->receiver_node = rn;
 569         PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
 570                 audio_formats[format], r->name, slot_num);
 571         rn->task.pre_select = r->pre_select;
 572         rn->task.post_select = r->post_select;
 573         sprintf(rn->task.status, "%s receiver node", r->name);
 574         register_task(&rn->task);
 575         return slot_num;
 576 }
 577
 578 static bool receiver_running(void)
 579 {
 580         int i;
 581         long unsigned ss1 = stat_task->server_stream_start.tv_sec;
 582
 583         FOR_EACH_SLOT(i) {
 584                 struct slot_info *s = &slot[i];
 585                 long unsigned ss2 = s->server_stream_start.tv_sec;
 586
 587                 if (!s->receiver_node)
 588                         continue;
 589                 if (s->receiver_node->task.error >= 0)
 590                         return true;
 591                 if (ss1 == ss2)
 592                         return true;
 593         }
 594         return false;
 595 }
 596
 597 /**
 598  * Return the root node of the current buffer tree.
 599  *
 600  * This is only used for stream grabbing.
 601  *
 602  * \return \p NULL if no slot is currently active. If more than one buffer tree
 603  * exists, the node corresponding to the most recently started receiver is
 604  * returned.
 605  */
 606 struct btr_node *audiod_get_btr_root(void)
 607 {
 608         int i, newest_slot = -1;
 609         struct timeval newest_rstime = {0, 0};
 610
 611         FOR_EACH_SLOT(i) {
 612                 struct slot_info *s = &slot[i];
 613                 struct timeval rstime;
 614                 if (!s->receiver_node)
 615                         continue;
 616                 if (s->receiver_node->task.error < 0)
 617                         continue;
 618                 btr_get_node_start(s->receiver_node->btrn, &rstime);
 619                 if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
 620                         continue;
 621                 newest_rstime = rstime;
 622                 newest_slot = i;
 623         }
 624         if (newest_slot == -1)
 625                 return NULL;
 626         return slot[newest_slot].receiver_node->btrn;
 627 }
 628
 629 /* whether a new instance of a decoder should be started. */
 630 static bool must_start_decoder(void)
 631 {
 632         int cafn = stat_task->current_audio_format_num;
 633         unsigned vs = stat_task->vss_status;
 634
 635         if (cafn < 0)
 636                 return false;
 637         if (!stat_task->ct)
 638                 return false;
 639         if (vs & VSS_STATUS_FLAG_NEXT)
 640                 return false;
 641         if (!(vs & VSS_STATUS_FLAG_PLAYING))
 642                 return false;
 643         if (receiver_running())
 644                 return false;
 645         if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
 646                 return false;
 647         return true;
 648 }
 649
 650 static unsigned compute_time_diff(const struct timeval *status_time)
 651 {
 652         struct timeval tmp, diff;
 653         static unsigned count;
 654         int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
 655         const struct timeval max_deviation = {0, 500 * 1000};
 656         const int time_smooth = 5;
 657
 658         if (!status_time)
 659                 return count;
 660         sign = tv_diff(status_time, now, &diff);
 661 //              PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
 662 //                      sign, sa_time_diff_sign);
 663         if (!count) {
 664                 sa_time_diff_sign = sign;
 665                 stat_task->sa_time_diff = diff;
 666                 count++;
 667                 goto out;
 668         }
 669         if (count > 5) {
 670                 int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
 671                 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
 672                         PARA_WARNING_LOG("time diff jump: %lims\n",
 673                                 s * tv2ms(&tmp));
 674         }
 675         count++;
 676         sa_time_diff_sign = tv_convex_combination(
 677                 sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
 678                 count > 10? sign : sign * time_smooth, &diff,
 679                 &tmp);
 680         stat_task->sa_time_diff = tmp;
 681         PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
 682                 sign < 0? "-" : "+",
 683                 tv2ms(&diff),
 684                 sa_time_diff_sign < 0? "-" : "+",
 685                 tv2ms(&stat_task->sa_time_diff)
 686         );
 687 out:
 688         stat_task->sa_time_diff_sign = sa_time_diff_sign;
 689         return count;
 690 }
 691
 692 static int update_item(int itemnum, char *buf)
 693 {
 694         long unsigned sec, usec;
 695
 696         if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
 697                 return 1;
 698         free(stat_item_values[itemnum]);
 699         stat_item_values[itemnum] = para_strdup(buf);
 700         stat_client_write_item(itemnum);
 701         switch (itemnum) {
 702         case SI_STATUS_FLAGS:
 703                 stat_task->vss_status = 0;
 704                 if (strchr(buf, 'N'))
 705                         stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
 706                 if (strchr(buf, 'P'))
 707                         stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
 708                 break;
 709         case SI_OFFSET:
 710                 stat_task->offset_seconds = atoi(buf);
 711                 break;
 712         case SI_SECONDS_TOTAL:
 713                 stat_task->length_seconds = atoi(buf);
 714                 break;
 715         case SI_STREAM_START:
 716                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 717                         stat_task->server_stream_start.tv_sec = sec;
 718                         stat_task->server_stream_start.tv_usec = usec;
 719                 }
 720                 break;
 721         case SI_CURRENT_TIME:
 722                 if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
 723                         struct timeval tv = {sec, usec};
 724                         compute_time_diff(&tv);
 725                 }
 726                 break;
 727         case SI_FORMAT:
 728                 stat_task->current_audio_format_num
 729                         = get_audio_format_num(buf);
 730         }
 731         return 1;
 732 }
 733
 734 static int parse_stream_command(const char *txt, char **cmd)
 735 {
 736         char *p = strchr(txt, ':');
 737         int i;
 738
 739         if (!p)
 740                 return -E_MISSING_COLON;
 741         p++;
 742         FOR_EACH_AUDIO_FORMAT(i) {
 743                 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
 744                         continue;
 745                 *cmd = p;
 746                 return i;
 747         }
 748         return -E_UNSUPPORTED_AUDIO_FORMAT;
 749 }
 750
 751 static int add_filter(int format, char *cmdline)
 752 {
 753         struct audio_format_info *a = &afi[format];
 754         int filter_num, nf = a->num_filters;
 755
 756         filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
 757         if (filter_num < 0)
 758                 return filter_num;
 759         a->filter_nums[nf] = filter_num;
 760         a->num_filters++;
 761         PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
 762                 filters[filter_num].name);
 763         return filter_num;
 764 }
 765
 766 static int parse_writer_args(void)
 767 {
 768         int i, ret, nw;
 769         char *cmd;
 770         struct audio_format_info *a;
 771
 772         nw = PARA_MAX(1U, conf.writer_given);
 773         PARA_INFO_LOG("maximal number of writers: %d\n", nw);
 774         FOR_EACH_AUDIO_FORMAT(i) {
 775                 a = &afi[i];
 776                 a->writer_conf = para_malloc(nw * sizeof(void *));
 777                 a->writer_nums = para_malloc(nw * sizeof(int));
 778                 a->num_writers = 0;
 779         }
 780         for (i = 0; i < conf.writer_given; i++) {
 781                 void *wconf;
 782                 int writer_num;
 783                 ret = parse_stream_command(conf.writer_arg[i], &cmd);
 784                 if (ret < 0)
 785                         goto out;
 786                 a = &afi[ret];
 787                 nw = a->num_writers;
 788                 wconf = check_writer_arg(cmd, &writer_num);
 789                 if (!wconf) {
 790                         ret = writer_num;
 791                         goto out;
 792                 }
 793                 a->writer_nums[nw] = writer_num;
 794                 a->writer_conf[nw] = wconf;
 795                 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
 796                         nw, writer_names[writer_num]);
 797                 a->num_writers++;
 798         }
 799         ret = 1;
 800 out:
 801         return ret;
 802 }
 803
 804 static int parse_receiver_args(void)
 805 {
 806         int i, ret, receiver_num;
 807         char *cmd = NULL;
 808         struct audio_format_info *a;
 809
 810         for (i = conf.receiver_given - 1; i >= 0; i--) {
 811                 char *arg = conf.receiver_arg[i];
 812                 char *recv_arg = strchr(arg, ':');
 813                 ret = -E_MISSING_COLON;
 814                 if (!recv_arg)
 815                         goto out;
 816                 *recv_arg = '\0';
 817                 recv_arg++;
 818                 ret = get_audio_format_num(arg);
 819                 if (ret < 0)
 820                         goto out;
 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         /* use the first available receiver with no arguments
 829          * for those audio formats for which no receiver
 830          * 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                         tmp = para_strdup("fecdec");
 865                         add_filter(i, tmp);
 866                         free(tmp);
 867                         if (ret < 0)
 868                                 goto out;
 869                 }
 870                 /* add "dec" to audio format name */
 871                 tmp = make_message("%sdec", audio_formats[i]);
 872                 for (j = 0; filters[j].name; j++)
 873                         if (!strcmp(tmp, filters[j].name))
 874                                 break;
 875                 free(tmp);
 876                 ret = -E_UNSUPPORTED_FILTER;
 877                 if (!filters[j].name)
 878                         goto out;
 879                 tmp = para_strdup(filters[j].name);
 880                 ret = add_filter(i, tmp);
 881                 free(tmp);
 882                 if (ret < 0)
 883                         goto out;
 884                 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
 885                         filters[j].name);
 886         }
 887 out:
 888         return ret;
 889 }
 890
 891 static int parse_filter_args(void)
 892 {
 893         int i, ret, nf;
 894
 895         nf = PARA_MAX(2U, conf.filter_given);
 896         PARA_INFO_LOG("maximal number of filters: %d\n", nf);
 897         FOR_EACH_AUDIO_FORMAT(i) {
 898                 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
 899                 afi[i].filter_nums = para_malloc(nf * sizeof(unsigned));
 900         }
 901         if (!conf.no_default_filters_given)
 902                 return init_default_filters();
 903         for (i = 0; i < conf.filter_given; i++) {
 904                 char *arg = conf.filter_arg[i];
 905                 char *filter_name = strchr(arg, ':');
 906                 ret = -E_MISSING_COLON;
 907                 if (!filter_name)
 908                         goto out;
 909                 *filter_name = '\0';
 910                 filter_name++;
 911                 ret = get_audio_format_num(arg);
 912                 if (ret < 0)
 913                         goto out;
 914                 ret = add_filter(ret, filter_name);
 915                 if (ret < 0)
 916                         goto out;
 917         }
 918         ret = init_default_filters(); /* use default values for the rest */
 919 out:
 920         return ret;
 921 }
 922
 923 static int parse_stream_args(void)
 924 {
 925         int ret;
 926
 927         ret = parse_receiver_args();
 928         if (ret < 0)
 929                 return ret;
 930         ret = parse_filter_args();
 931         if (ret < 0)
 932                 return ret;
 933         ret = parse_writer_args();
 934         if (ret < 0)
 935                 return ret;
 936         return 1;
 937 }
 938
 939 /* does not unlink socket on errors */
 940 static int audiod_get_socket(void)
 941 {
 942         struct sockaddr_un unix_addr;
 943         int ret, fd;
 944
 945         if (conf.socket_given)
 946                 socket_name = para_strdup(conf.socket_arg);
 947         else {
 948                 char *hn = para_hostname();
 949                 socket_name = make_message("/var/paraslash/audiod_socket.%s",
 950                         hn);
 951                 free(hn);
 952         }
 953         PARA_NOTICE_LOG("local socket: %s\n", socket_name);
 954         if (conf.force_given)
 955                 unlink(socket_name);
 956         ret = create_local_socket(socket_name, &unix_addr,
 957                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
 958         if (ret < 0)
 959                 goto err;
 960         fd = ret;
 961         if (listen(fd , 5) < 0) {
 962                 ret = -ERRNO_TO_PARA_ERROR(errno);
 963                 goto err;
 964         }
 965         ret = mark_fd_nonblocking(fd);
 966         if (ret < 0)
 967                 goto err;
 968         return fd;
 969 err:
 970         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 971         exit(EXIT_FAILURE);
 972 }
 973
 974 static void signal_pre_select(struct sched *s, struct task *t)
 975 {
 976         struct signal_task *st = container_of(t, struct signal_task, task);
 977         para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 978 }
 979
 980 static void signal_post_select(struct sched *s, struct task *t)
 981 {
 982         struct signal_task *st = container_of(t, struct signal_task, task);
 983
 984         if (!FD_ISSET(st->fd, &s->rfds))
 985                 return;
 986
 987         st->signum = para_next_signal();
 988         switch (st->signum) {
 989         case SIGINT:
 990         case SIGTERM:
 991         case SIGHUP:
 992                 PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
 993                 clean_exit(EXIT_FAILURE, "caught deadly signal");
 994         }
 995 }
 996
 997 static void signal_setup_default(struct signal_task *st)
 998 {
 999         st->task.pre_select = signal_pre_select;
1000         st->task.post_select = signal_post_select;
1001         sprintf(st->task.status, "signal task");
1002 }
1003
1004 static void command_pre_select(struct sched *s, struct task *t)
1005 {
1006         struct command_task *ct = container_of(t, struct command_task, task);
1007         para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1008 }
1009
1010 static void command_post_select(struct sched *s, struct task *t)
1011 {
1012         int ret;
1013         struct command_task *ct = container_of(t, struct command_task, task);
1014         static struct timeval last_status_dump;
1015         struct timeval tmp, delay = {0, 500 * 1000};
1016
1017         tv_add(&last_status_dump, &delay, &tmp);
1018         if (tv_diff(&tmp, now, NULL) < 0) {
1019                 audiod_status_dump();
1020                 last_status_dump = *now;
1021         }
1022
1023         if (!FD_ISSET(ct->fd, &s->rfds))
1024                 return;
1025         ret = handle_connect(ct->fd);
1026         if (ret < 0)
1027                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1028 }
1029
1030 static void init_command_task(struct command_task *ct)
1031 {
1032         ct->task.pre_select = command_pre_select;
1033         ct->task.post_select = command_post_select;
1034         ct->task.error = 0;
1035         ct->fd = audiod_get_socket(); /* doesn't return on errors */
1036         sprintf(ct->task.status, "command task");
1037 }
1038
1039 static void close_stat_pipe(void)
1040 {
1041         if (!stat_task->ct)
1042                 return;
1043         btr_free_node(stat_task->ct->btrn);
1044         client_close(stat_task->ct);
1045         stat_task->ct = NULL;
1046         clear_and_dump_items();
1047         stat_task->length_seconds = 0;
1048         stat_task->offset_seconds = 0;
1049         stat_task->vss_status = 0;
1050         stat_task->current_audio_format_num = -1;
1051         audiod_status_dump();
1052 }
1053
1054 /**
1055  * close the connection to para_server and exit
1056  *
1057  * \param status the exit status which is passed to exit(3)
1058  * \param msg the log message
1059  *
1060  * Log \a msg with loglevel \p EMERG, close the connection to para_server if
1061  * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
1062  * EXIT_FAILURE.
1063  *
1064  * \sa exit(3)
1065  */
1066 void __noreturn clean_exit(int status, const char *msg)
1067 {
1068         PARA_EMERG_LOG("%s\n", msg);
1069         if (socket_name)
1070                 unlink(socket_name);
1071         close_stat_pipe();
1072         exit(status);
1073 }
1074
1075 /* avoid busy loop if server is down */
1076 static void set_stat_task_restart_barrier(unsigned seconds)
1077 {
1078         struct timeval delay = {seconds, 0};
1079         tv_add(now, &delay, &stat_task->restart_barrier);
1080 }
1081
1082 static void try_to_close_slot(int slot_num)
1083 {
1084         struct slot_info *s = &slot[slot_num];
1085         struct audio_format_info *a = afi + s->format;
1086         int i;
1087
1088         if (s->format < 0)
1089                 return;
1090         if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
1091                 return;
1092         for (i = 0; i < a->num_filters; i++)
1093                 if (s->fns && s->fns[i].task.error != -E_TASK_UNREGISTERED)
1094                         return;
1095         if (a->num_writers > 0) {
1096                 for (i = 0; i < a->num_writers; i++)
1097                         if (s->wns && s->wns[i].task.error != -E_TASK_UNREGISTERED)
1098                                 return;
1099         } else {
1100                 if (s->wns && s->wns[0].task.error != -E_TASK_UNREGISTERED)
1101                         return;
1102         }
1103         PARA_INFO_LOG("closing slot %d\n", slot_num);
1104         close_writers(s);
1105         close_filters(s);
1106         close_receiver(slot_num);
1107         clear_slot(slot_num);
1108 }
1109
1110 /*
1111  * Check if any receivers/filters/writers need to be started and do so if
1112  * necessary.
1113  */
1114 static void start_stop_decoders(void)
1115 {
1116         int i, ret;
1117         struct slot_info *sl;
1118         struct audio_format_info *a;
1119
1120         FOR_EACH_SLOT(i)
1121                 try_to_close_slot(i);
1122         if (audiod_status != AUDIOD_ON ||
1123                         !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
1124                 return kill_all_decoders(-E_NOT_PLAYING);
1125         if (!must_start_decoder())
1126                 return;
1127         ret = open_receiver(stat_task->current_audio_format_num);
1128         if (ret < 0) {
1129                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1130                 return;
1131         }
1132         sl = slot + ret;
1133         a = afi + sl->format;
1134         if (a->num_filters)
1135                 open_filters(sl);
1136         open_writers(sl);
1137         activate_grab_clients();
1138         btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
1139 }
1140
1141 static void status_pre_select(struct sched *s, struct task *t)
1142 {
1143         struct status_task *st = container_of(t, struct status_task, task);
1144         int ret, cafn = stat_task->current_audio_format_num;
1145
1146         if (must_start_decoder())
1147                 goto min_delay;
1148         ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
1149         if (ret > 0)
1150                 goto min_delay;
1151         if (!st->ct)
1152                 sched_request_barrier_or_min_delay(&st->restart_barrier, s);
1153         if (cafn >= 0)
1154                 sched_request_barrier(&afi[cafn].restart_barrier, s);
1155         return;
1156 min_delay:
1157         sched_min_delay(s);
1158 }
1159
1160 /* restart the client task if necessary */
1161 static void status_post_select(__a_unused struct sched *s, struct task *t)
1162 {
1163         struct status_task *st = container_of(t, struct status_task, task);
1164
1165         if (audiod_status == AUDIOD_OFF) {
1166                 if (!st->ct)
1167                         goto out;
1168                 if (st->ct->task.error >= 0) {
1169                         kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
1170                         goto out;
1171                 }
1172                 if (st->ct->task.error != -E_TASK_UNREGISTERED)
1173                         goto out;
1174                 close_stat_pipe();
1175                 st->clock_diff_count = conf.clock_diff_count_arg;
1176                 goto out;
1177         }
1178         if (st->ct) {
1179                 char *buf;
1180                 size_t sz;
1181                 int ret;
1182                 if (st->ct->task.error < 0) {
1183                         if (st->ct->task.error != -E_TASK_UNREGISTERED)
1184                                 goto out;
1185                         close_stat_pipe();
1186                         goto out;
1187                 }
1188                 if (st->ct->status != CL_RECEIVING)
1189                         goto out;
1190                 ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
1191                 if (ret <= 0)
1192                         goto out;
1193                 sz = btr_next_buffer(st->btrn, &buf);
1194                 ret = for_each_stat_item(buf, sz, update_item);
1195                 if (ret < 0) {
1196                         kill_btrn(st->ct->btrn, &st->ct->task, ret);
1197                         goto out;
1198                 }
1199                 if (sz != ret)
1200                         st->last_status_read = *now;
1201                 else {
1202                         struct timeval diff;
1203                         tv_diff(now, &st->last_status_read, &diff);
1204                         if (diff.tv_sec > 61)
1205                                 kill_btrn(st->ct->btrn, &st->ct->task,
1206                                         -E_STATUS_TIMEOUT);
1207                 }
1208                 btr_consume(st->btrn, sz - ret);
1209                 goto out;
1210         }
1211         if (tv_diff(now, &st->restart_barrier, NULL) < 0)
1212                 goto out;
1213         if (st->clock_diff_count) { /* get status only one time */
1214                 char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
1215                 int argc = 5;
1216                 PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
1217                 st->clock_diff_count--;
1218                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1219                 set_stat_task_restart_barrier(2);
1220
1221         } else {
1222                 char *argv[] = {"audiod", "--", "stat", "-p", NULL};
1223                 int argc = 4;
1224                 client_open(argc, argv, &st->ct, NULL, NULL, st->btrn);
1225                 set_stat_task_restart_barrier(5);
1226         }
1227         free(stat_item_values[SI_BASENAME]);
1228         stat_item_values[SI_BASENAME] = para_strdup(
1229                 "no connection to para_server");
1230         stat_client_write_item(SI_BASENAME);
1231         st->last_status_read = *now;
1232 out:
1233         start_stop_decoders();
1234 }
1235
1236 static void init_status_task(struct status_task *st)
1237 {
1238         memset(st, 0, sizeof(struct status_task));
1239         st->task.pre_select = status_pre_select;
1240         st->task.post_select = status_post_select;
1241         st->sa_time_diff_sign = 1;
1242         st->clock_diff_count = conf.clock_diff_count_arg;
1243         st->current_audio_format_num = -1;
1244         sprintf(st->task.status, "stat");
1245         st->btrn = btr_new_node(&(struct btr_node_description)
1246                 EMBRACE(.name = "stat"));
1247 }
1248
1249 static void set_initial_status(void)
1250 {
1251         audiod_status = AUDIOD_ON;
1252         if (!conf.mode_given)
1253                 return;
1254         if (!strcmp(conf.mode_arg, "sb")) {
1255                 audiod_status = AUDIOD_STANDBY;
1256                 return;
1257         }
1258         if (!strcmp(conf.mode_arg, "off")) {
1259                 audiod_status = AUDIOD_OFF;
1260                 return;
1261         }
1262         if (strcmp(conf.mode_arg, "on"))
1263                 PARA_WARNING_LOG("invalid mode\n");
1264 }
1265
1266 __noreturn static void print_help_and_die(void)
1267 {
1268         int d = conf.detailed_help_given;
1269         const char **p = d? audiod_args_info_detailed_help
1270                 : audiod_args_info_help;
1271
1272         printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
1273                 AUDIOD_CMDLINE_PARSER_VERSION);
1274         printf_or_die("%s\n\n", audiod_args_info_usage);
1275         for (; *p; p++)
1276                 printf_or_die("%s\n", *p);
1277         print_receiver_helps(d);
1278         print_filter_helps(d);
1279         print_writer_helps(d);
1280         exit(0);
1281 }
1282
1283 static void init_colors_or_die(void)
1284 {
1285         int ret, i;
1286
1287         if (!want_colors())
1288                 return;
1289         daemon_set_default_log_colors();
1290         daemon_set_flag(DF_COLOR_LOG);
1291         for (i = 0; i < conf.log_color_given; i++) {
1292                 ret = daemon_set_log_color(conf.log_color_arg[i]);
1293                 if (ret < 0)
1294                         exit(EXIT_FAILURE);
1295         }
1296 }
1297
1298 /**
1299  * the main function of para_audiod
1300  *
1301  * \param argc usual argument count
1302  * \param argv usual argument vector
1303  *
1304  * \return EXIT_SUCCESS or EXIT_FAILURE
1305  *
1306  * \sa para_audiod(1)
1307  * */
1308 int main(int argc, char *argv[])
1309 {
1310         int ret, i;
1311         static struct sched s;
1312         struct command_task command_task_struct, *cmd_task = &command_task_struct;
1313         struct audiod_cmdline_parser_params params = {
1314                 .override = 0,
1315                 .initialize = 1,
1316                 .check_required = 0,
1317                 .check_ambiguity = 0,
1318                 .print_errors = 1
1319         };
1320
1321         valid_fd_012();
1322         if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
1323                 exit(EXIT_FAILURE);
1324         HANDLE_VERSION_FLAG("audiod", conf);
1325         /* init receivers/filters/writers early to make help work */
1326         recv_init();
1327         filter_init();
1328         writer_init();
1329         if (conf.help_given || conf.detailed_help_given)
1330                 print_help_and_die();
1331         drop_privileges_or_die(conf.user_arg, conf.group_arg);
1332         parse_config_or_die();
1333         init_colors_or_die();
1334         init_random_seed_or_die();
1335         daemon_set_flag(DF_LOG_TIME);
1336         daemon_set_flag(DF_LOG_HOSTNAME);
1337         daemon_set_flag(DF_LOG_LL);
1338         if (conf.log_timing_given)
1339                 daemon_set_flag(DF_LOG_TIMING);
1340         if (conf.logfile_given) {
1341                 daemon_set_logfile(conf.logfile_arg);
1342                 daemon_open_log_or_die();
1343         }
1344         ret = parse_stream_args();
1345         if (ret < 0) {
1346                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1347                 exit(EXIT_FAILURE);
1348         }
1349         log_welcome("para_audiod");
1350         server_uptime(UPTIME_SET);
1351         set_initial_status();
1352         FOR_EACH_SLOT(i)
1353                 clear_slot(i);
1354         setup_signal_handling();
1355         signal_setup_default(sig_task);
1356
1357         init_status_task(stat_task);
1358         init_command_task(cmd_task);
1359
1360         if (conf.daemon_given)
1361                 daemonize();
1362
1363         register_task(&sig_task->task);
1364         register_task(&cmd_task->task);
1365         register_task(&stat_task->task);
1366         s.default_timeout.tv_sec = 2;
1367         s.default_timeout.tv_usec = 999 * 1000;
1368         ret = schedule(&s);
1369
1370         PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1371         return EXIT_FAILURE;
1372 }