pbx/pbx_spool.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2010, Digium, Inc.
   5  *
   6  * Mark Spencer <markster@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  *
  21  * \brief Full-featured outgoing call spool support
  22  *
  23  */
  24
  25 #include "asterisk.h"
  26
  27 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  28
  29 /* Handling of call files using inotify is not functioning correctly currently:
  30  * Issue 18089 - https://issues.asterisk.org/view.php?id=18089
  31  */
  32 #undef HAVE_INOTIFY
  33
  34 #include <sys/stat.h>
  35 #include <time.h>
  36 #include <utime.h>
  37 #include <dirent.h>
  38 #ifdef HAVE_INOTIFY
  39 #include <sys/inotify.h>
  40 #elif defined(HAVE_KQUEUE)
  41 #include <sys/types.h>
  42 #include <sys/time.h>
  43 #include <sys/event.h>
  44 #include <fcntl.h>
  45 #endif
  46
  47 #include "asterisk/paths.h"     /* use ast_config_AST_SPOOL_DIR */
  48 #include "asterisk/lock.h"
  49 #include "asterisk/file.h"
  50 #include "asterisk/logger.h"
  51 #include "asterisk/channel.h"
  52 #include "asterisk/callerid.h"
  53 #include "asterisk/pbx.h"
  54 #include "asterisk/module.h"
  55 #include "asterisk/utils.h"
  56 #include "asterisk/options.h"
  57
  58 /*
  59  * pbx_spool is similar in spirit to qcall, but with substantially enhanced functionality...
  60  * The spool file contains a header
  61  */
  62
  63 enum {
  64         /*! Always delete the call file after a call succeeds or the
  65          * maximum number of retries is exceeded, even if the
  66          * modification time of the call file is in the future.
  67          */
  68         SPOOL_FLAG_ALWAYS_DELETE = (1 << 0),
  69         /* Don't unlink the call file after processing, move in qdonedir */
  70         SPOOL_FLAG_ARCHIVE = (1 << 1)
  71 };
  72
  73 static char qdir[255];
  74 static char qdonedir[255];
  75
  76 struct outgoing {
  77         int retries;                              /*!< Current number of retries */
  78         int maxretries;                           /*!< Maximum number of retries permitted */
  79         int retrytime;                            /*!< How long to wait between retries (in seconds) */
  80         int waittime;                             /*!< How long to wait for an answer */
  81         long callingpid;                          /*!< PID which is currently calling */
  82         format_t format;                          /*!< Formats (codecs) for this call */
  83         AST_DECLARE_STRING_FIELDS (
  84                 AST_STRING_FIELD(fn);                 /*!< File name of call file */
  85                 AST_STRING_FIELD(tech);               /*!< Which channel technology to use for outgoing call */
  86                 AST_STRING_FIELD(dest);               /*!< Which device/line to use for outgoing call */
  87                 AST_STRING_FIELD(app);                /*!< If application: Application name */
  88                 AST_STRING_FIELD(data);               /*!< If application: Application data */
  89                 AST_STRING_FIELD(exten);              /*!< If extension/context/priority: Extension in dialplan */
  90                 AST_STRING_FIELD(context);            /*!< If extension/context/priority: Dialplan context */
  91                 AST_STRING_FIELD(cid_num);            /*!< CallerID Information: Number/extension */
  92                 AST_STRING_FIELD(cid_name);           /*!< CallerID Information: Name */
  93                 AST_STRING_FIELD(account);            /*!< account code */
  94         );
  95         int priority;                             /*!< If extension/context/priority: Dialplan priority */
  96         struct ast_variable *vars;                /*!< Variables and Functions */
  97         int maxlen;                               /*!< Maximum length of call */
  98         struct ast_flags options;                 /*!< options */
  99 };
 100
 101 static int init_outgoing(struct outgoing *o)
 102 {
 103         o->priority = 1;
 104         o->retrytime = 300;
 105         o->waittime = 45;
 106         o->format = AST_FORMAT_SLINEAR;
 107         ast_set_flag(&o->options, SPOOL_FLAG_ALWAYS_DELETE);
 108         if (ast_string_field_init(o, 128)) {
 109                 return -1;
 110         }
 111         return 0;
 112 }
 113
 114 static void free_outgoing(struct outgoing *o)
 115 {
 116         if (o->vars) {
 117                 ast_variables_destroy(o->vars);
 118         }
 119         ast_string_field_free_memory(o);
 120         ast_free(o);
 121 }
 122
 123 static int apply_outgoing(struct outgoing *o, const char *fn, FILE *f)
 124 {
 125         char buf[256];
 126         char *c, *c2;
 127         int lineno = 0;
 128         struct ast_variable *var, *last = o->vars;
 129
 130         while (last && last->next) {
 131                 last = last->next;
 132         }
 133
 134         while(fgets(buf, sizeof(buf), f)) {
 135                 lineno++;
 136                 /* Trim comments */
 137                 c = buf;
 138                 while ((c = strchr(c, '#'))) {
 139                         if ((c == buf) || (*(c-1) == ' ') || (*(c-1) == '\t'))
 140                                 *c = '\0';
 141                         else
 142                                 c++;
 143                 }
 144
 145                 c = buf;
 146                 while ((c = strchr(c, ';'))) {
 147                         if ((c > buf) && (c[-1] == '\\')) {
 148                                 memmove(c - 1, c, strlen(c) + 1);
 149                                 c++;
 150                         } else {
 151                                 *c = '\0';
 152                                 break;
 153                         }
 154                 }
 155
 156                 /* Trim trailing white space */
 157                 while(!ast_strlen_zero(buf) && buf[strlen(buf) - 1] < 33)
 158                         buf[strlen(buf) - 1] = '\0';
 159                 if (!ast_strlen_zero(buf)) {
 160                         c = strchr(buf, ':');
 161                         if (c) {
 162                                 *c = '\0';
 163                                 c++;
 164                                 while ((*c) && (*c < 33))
 165                                         c++;
 166 #if 0
 167                                 printf("'%s' is '%s' at line %d\n", buf, c, lineno);
 168 #endif
 169                                 if (!strcasecmp(buf, "channel")) {
 170                                         if ((c2 = strchr(c, '/'))) {
 171                                                 *c2 = '\0';
 172                                                 c2++;
 173                                                 ast_string_field_set(o, tech, c);
 174                                                 ast_string_field_set(o, dest, c2);
 175                                         } else {
 176                                                 ast_log(LOG_NOTICE, "Channel should be in form Tech/Dest at line %d of %s\n", lineno, fn);
 177                                         }
 178                                 } else if (!strcasecmp(buf, "callerid")) {
 179                                         char cid_name[80] = {0}, cid_num[80] = {0};
 180                                         ast_callerid_split(c, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
 181                                         ast_string_field_set(o, cid_num, cid_num);
 182                                         ast_string_field_set(o, cid_name, cid_name);
 183                                 } else if (!strcasecmp(buf, "application")) {
 184                                         ast_string_field_set(o, app, c);
 185                                 } else if (!strcasecmp(buf, "data")) {
 186                                         ast_string_field_set(o, data, c);
 187                                 } else if (!strcasecmp(buf, "maxretries")) {
 188                                         if (sscanf(c, "%30d", &o->maxretries) != 1) {
 189                                                 ast_log(LOG_WARNING, "Invalid max retries at line %d of %s\n", lineno, fn);
 190                                                 o->maxretries = 0;
 191                                         }
 192                                 } else if (!strcasecmp(buf, "codecs")) {
 193                                         ast_parse_allow_disallow(NULL, &o->format, c, 1);
 194                                 } else if (!strcasecmp(buf, "context")) {
 195                                         ast_string_field_set(o, context, c);
 196                                 } else if (!strcasecmp(buf, "extension")) {
 197                                         ast_string_field_set(o, exten, c);
 198                                 } else if (!strcasecmp(buf, "priority")) {
 199                                         if ((sscanf(c, "%30d", &o->priority) != 1) || (o->priority < 1)) {
 200                                                 ast_log(LOG_WARNING, "Invalid priority at line %d of %s\n", lineno, fn);
 201                                                 o->priority = 1;
 202                                         }
 203                                 } else if (!strcasecmp(buf, "retrytime")) {
 204                                         if ((sscanf(c, "%30d", &o->retrytime) != 1) || (o->retrytime < 1)) {
 205                                                 ast_log(LOG_WARNING, "Invalid retrytime at line %d of %s\n", lineno, fn);
 206                                                 o->retrytime = 300;
 207                                         }
 208                                 } else if (!strcasecmp(buf, "waittime")) {
 209                                         if ((sscanf(c, "%30d", &o->waittime) != 1) || (o->waittime < 1)) {
 210                                                 ast_log(LOG_WARNING, "Invalid waittime at line %d of %s\n", lineno, fn);
 211                                                 o->waittime = 45;
 212                                         }
 213                                 } else if (!strcasecmp(buf, "retry")) {
 214                                         o->retries++;
 215                                 } else if (!strcasecmp(buf, "startretry")) {
 216                                         if (sscanf(c, "%30ld", &o->callingpid) != 1) {
 217                                                 ast_log(LOG_WARNING, "Unable to retrieve calling PID!\n");
 218                                                 o->callingpid = 0;
 219                                         }
 220                                 } else if (!strcasecmp(buf, "endretry") || !strcasecmp(buf, "abortretry")) {
 221                                         o->callingpid = 0;
 222                                         o->retries++;
 223                                 } else if (!strcasecmp(buf, "delayedretry")) {
 224                                 } else if (!strcasecmp(buf, "setvar") || !strcasecmp(buf, "set")) {
 225                                         c2 = c;
 226                                         strsep(&c2, "=");
 227                                         if (c2) {
 228                                                 var = ast_variable_new(c, c2, fn);
 229                                                 if (var) {
 230                                                         /* Always insert at the end, because some people want to treat the spool file as a script */
 231                                                         if (last) {
 232                                                                 last->next = var;
 233                                                         } else {
 234                                                                 o->vars = var;
 235                                                         }
 236                                                         last = var;
 237                                                 }
 238                                         } else
 239                                                 ast_log(LOG_WARNING, "Malformed \"%s\" argument.  Should be \"%s: variable=value\"\n", buf, buf);
 240                                 } else if (!strcasecmp(buf, "account")) {
 241                                         ast_string_field_set(o, account, c);
 242                                 } else if (!strcasecmp(buf, "alwaysdelete")) {
 243                                         ast_set2_flag(&o->options, ast_true(c), SPOOL_FLAG_ALWAYS_DELETE);
 244                                 } else if (!strcasecmp(buf, "archive")) {
 245                                         ast_set2_flag(&o->options, ast_true(c), SPOOL_FLAG_ARCHIVE);
 246                                 } else {
 247                                         ast_log(LOG_WARNING, "Unknown keyword '%s' at line %d of %s\n", buf, lineno, fn);
 248                                 }
 249                         } else
 250                                 ast_log(LOG_NOTICE, "Syntax error at line %d of %s\n", lineno, fn);
 251                 }
 252         }
 253         ast_string_field_set(o, fn, fn);
 254         if (ast_strlen_zero(o->tech) || ast_strlen_zero(o->dest) || (ast_strlen_zero(o->app) && ast_strlen_zero(o->exten))) {
 255                 ast_log(LOG_WARNING, "At least one of app or extension must be specified, along with tech and dest in file %s\n", fn);
 256                 return -1;
 257         }
 258         return 0;
 259 }
 260
 261 static void safe_append(struct outgoing *o, time_t now, char *s)
 262 {
 263         int fd;
 264         FILE *f;
 265         struct utimbuf tbuf;
 266
 267         if ((fd = open(o->fn, O_WRONLY | O_APPEND)) < 0)
 268                 return;
 269
 270         if ((f = fdopen(fd, "a"))) {
 271                 fprintf(f, "\n%s: %ld %d (%ld)\n", s, (long)ast_mainpid, o->retries, (long) now);
 272                 fclose(f);
 273         } else
 274                 close(fd);
 275
 276         /* Update the file time */
 277         tbuf.actime = now;
 278         tbuf.modtime = now + o->retrytime;
 279         if (utime(o->fn, &tbuf))
 280                 ast_log(LOG_WARNING, "Unable to set utime on %s: %s\n", o->fn, strerror(errno));
 281 }
 282
 283 /*!
 284  * \brief Remove a call file from the outgoing queue optionally moving it in the archive dir
 285  *
 286  * \param o the pointer to outgoing struct
 287  * \param status the exit status of the call. Can be "Completed", "Failed" or "Expired"
 288  */
 289 static int remove_from_queue(struct outgoing *o, const char *status)
 290 {
 291         int fd;
 292         FILE *f;
 293         char newfn[256];
 294         const char *bname;
 295
 296         if (!ast_test_flag(&o->options, SPOOL_FLAG_ALWAYS_DELETE)) {
 297                 struct stat current_file_status;
 298
 299                 if (!stat(o->fn, &current_file_status)) {
 300                         if (time(NULL) < current_file_status.st_mtime)
 301                                 return 0;
 302                 }
 303         }
 304
 305         if (!ast_test_flag(&o->options, SPOOL_FLAG_ARCHIVE)) {
 306                 unlink(o->fn);
 307                 return 0;
 308         }
 309
 310         if (ast_mkdir(qdonedir, 0777)) {
 311                 ast_log(LOG_WARNING, "Unable to create queue directory %s -- outgoing spool archiving disabled\n", qdonedir);
 312                 unlink(o->fn);
 313                 return -1;
 314         }
 315
 316         if ((fd = open(o->fn, O_WRONLY | O_APPEND))) {
 317                 if ((f = fdopen(fd, "a"))) {
 318                         fprintf(f, "Status: %s\n", status);
 319                         fclose(f);
 320                 } else
 321                         close(fd);
 322         }
 323
 324         if (!(bname = strrchr(o->fn, '/')))
 325                 bname = o->fn;
 326         else
 327                 bname++;
 328         snprintf(newfn, sizeof(newfn), "%s/%s", qdonedir, bname);
 329         /* a existing call file the archive dir is overwritten */
 330         unlink(newfn);
 331         if (rename(o->fn, newfn) != 0) {
 332                 unlink(o->fn);
 333                 return -1;
 334         } else
 335                 return 0;
 336 }
 337
 338 static void *attempt_thread(void *data)
 339 {
 340         struct outgoing *o = data;
 341         int res, reason;
 342         if (!ast_strlen_zero(o->app)) {
 343                 ast_verb(3, "Attempting call on %s/%s for application %s(%s) (Retry %d)\n", o->tech, o->dest, o->app, o->data, o->retries);
 344                 res = ast_pbx_outgoing_app(o->tech, o->format, (void *) o->dest, o->waittime * 1000, o->app, o->data, &reason, 2 /* wait to finish */, o->cid_num, o->cid_name, o->vars, o->account, NULL);
 345                 o->vars = NULL;
 346         } else {
 347                 ast_verb(3, "Attempting call on %s/%s for %s@%s:%d (Retry %d)\n", o->tech, o->dest, o->exten, o->context,o->priority, o->retries);
 348                 res = ast_pbx_outgoing_exten(o->tech, o->format, (void *) o->dest, o->waittime * 1000, o->context, o->exten, o->priority, &reason, 2 /* wait to finish */, o->cid_num, o->cid_name, o->vars, o->account, NULL);
 349                 o->vars = NULL;
 350         }
 351         if (res) {
 352                 ast_log(LOG_NOTICE, "Call failed to go through, reason (%d) %s\n", reason, ast_channel_reason2str(reason));
 353                 if (o->retries >= o->maxretries + 1) {
 354                         /* Max retries exceeded */
 355                         ast_log(LOG_NOTICE, "Queued call to %s/%s expired without completion after %d attempt%s\n", o->tech, o->dest, o->retries - 1, ((o->retries - 1) != 1) ? "s" : "");
 356                         remove_from_queue(o, "Expired");
 357                 } else {
 358                         /* Notate that the call is still active */
 359                         safe_append(o, time(NULL), "EndRetry");
 360                 }
 361         } else {
 362                 ast_log(LOG_NOTICE, "Call completed to %s/%s\n", o->tech, o->dest);
 363                 remove_from_queue(o, "Completed");
 364         }
 365         free_outgoing(o);
 366         return NULL;
 367 }
 368
 369 static void launch_service(struct outgoing *o)
 370 {
 371         pthread_t t;
 372         int ret;
 373
 374         if ((ret = ast_pthread_create_detached(&t, NULL, attempt_thread, o))) {
 375                 ast_log(LOG_WARNING, "Unable to create thread :( (returned error: %d)\n", ret);
 376                 free_outgoing(o);
 377         }
 378 }
 379
 380 /* Called from scan_thread or queue_file */
 381 static int scan_service(const char *fn, time_t now)
 382 {
 383         struct outgoing *o = NULL;
 384         FILE *f;
 385         int res = 0;
 386
 387         if (!(o = ast_calloc(1, sizeof(*o)))) {
 388                 ast_log(LOG_WARNING, "Out of memory ;(\n");
 389                 return -1;
 390         }
 391
 392         if (init_outgoing(o)) {
 393                 /* No need to call free_outgoing here since we know the failure
 394                  * was to allocate string fields and no variables have been allocated
 395                  * yet.
 396                  */
 397                 ast_free(o);
 398                 return -1;
 399         }
 400
 401         /* Attempt to open the file */
 402         if (!(f = fopen(fn, "r+"))) {
 403                 remove_from_queue(o, "Failed");
 404                 free_outgoing(o);
 405                 ast_log(LOG_WARNING, "Unable to open %s: %s, deleting\n", fn, strerror(errno));
 406                 return -1;
 407         }
 408
 409         /* Read in and verify the contents */
 410         if (apply_outgoing(o, fn, f)) {
 411                 remove_from_queue(o, "Failed");
 412                 free_outgoing(o);
 413                 ast_log(LOG_WARNING, "Invalid file contents in %s, deleting\n", fn);
 414                 fclose(f);
 415                 return -1;
 416         }
 417
 418 #if 0
 419         printf("Filename: %s, Retries: %d, max: %d\n", fn, o->retries, o->maxretries);
 420 #endif
 421         fclose(f);
 422         if (o->retries <= o->maxretries) {
 423                 now += o->retrytime;
 424                 if (o->callingpid && (o->callingpid == ast_mainpid)) {
 425                         safe_append(o, time(NULL), "DelayedRetry");
 426                         ast_log(LOG_DEBUG, "Delaying retry since we're currently running '%s'\n", o->fn);
 427                         free_outgoing(o);
 428                 } else {
 429                         /* Increment retries */
 430                         o->retries++;
 431                         /* If someone else was calling, they're presumably gone now
 432                            so abort their retry and continue as we were... */
 433                         if (o->callingpid)
 434                                 safe_append(o, time(NULL), "AbortRetry");
 435
 436                         safe_append(o, now, "StartRetry");
 437                         launch_service(o);
 438                 }
 439                 res = now;
 440         } else {
 441                 ast_log(LOG_NOTICE, "Queued call to %s/%s expired without completion after %d attempt%s\n", o->tech, o->dest, o->retries - 1, ((o->retries - 1) != 1) ? "s" : "");
 442                 remove_from_queue(o, "Expired");
 443                 free_outgoing(o);
 444         }
 445
 446         return res;
 447 }
 448
 449 #if defined(HAVE_INOTIFY) || defined(HAVE_KQUEUE)
 450 struct direntry {
 451         AST_LIST_ENTRY(direntry) list;
 452         time_t mtime;
 453         char name[0];
 454 };
 455
 456 /* Only one thread is accessing this list, so no lock is necessary */
 457 static AST_LIST_HEAD_NOLOCK_STATIC(dirlist, direntry);
 458
 459 static void queue_file(const char *filename, time_t when)
 460 {
 461         struct stat st;
 462         struct direntry *cur, *new;
 463         int res;
 464         time_t now = time(NULL);
 465
 466         if (filename[0] != '/') {
 467                 char *fn = alloca(strlen(qdir) + strlen(filename) + 2);
 468                 sprintf(fn, "%s/%s", qdir, filename); /* SAFE */
 469                 filename = fn;
 470         }
 471
 472         if (when == 0) {
 473                 if (stat(filename, &st)) {
 474                         ast_log(LOG_WARNING, "Unable to stat %s: %s\n", filename, strerror(errno));
 475                         return;
 476                 }
 477
 478                 if (!S_ISREG(st.st_mode)) {
 479                         return;
 480                 }
 481
 482                 when = st.st_mtime;
 483         }
 484
 485 #ifndef HAVE_INOTIFY
 486         /* Need to check the existing list for kqueue(2), in order to avoid duplicates. */
 487         AST_LIST_TRAVERSE(&dirlist, cur, list) {
 488                 if (cur->mtime == when && !strcmp(filename, cur->name)) {
 489                         return;
 490                 }
 491         }
 492 #endif
 493
 494         if ((res = when) > now || (res = scan_service(filename, now)) > 0) {
 495                 if (!(new = ast_calloc(1, sizeof(*new) + strlen(filename) + 1))) {
 496                         return;
 497                 }
 498                 new->mtime = res;
 499                 strcpy(new->name, filename);
 500                 /* List is ordered by mtime */
 501                 if (AST_LIST_EMPTY(&dirlist)) {
 502                         AST_LIST_INSERT_HEAD(&dirlist, new, list);
 503                 } else {
 504                         int found = 0;
 505                         AST_LIST_TRAVERSE_SAFE_BEGIN(&dirlist, cur, list) {
 506                                 if (cur->mtime > new->mtime) {
 507                                         AST_LIST_INSERT_BEFORE_CURRENT(new, list);
 508                                         found = 1;
 509                                         break;
 510                                 }
 511                         }
 512                         AST_LIST_TRAVERSE_SAFE_END
 513                         if (!found) {
 514                                 AST_LIST_INSERT_TAIL(&dirlist, new, list);
 515                         }
 516                 }
 517         }
 518 }
 519
 520 static void *scan_thread(void *unused)
 521 {
 522         DIR *dir;
 523         struct dirent *de;
 524         time_t now;
 525         struct timespec ts = { .tv_sec = 1 };
 526 #ifdef HAVE_INOTIFY
 527         int res;
 528         int inotify_fd = inotify_init();
 529         struct {
 530                 struct inotify_event iev;
 531                 /* It may not look like we're using this element, but when we read
 532                  * from inotify_fd, the event is typically larger than the first
 533                  * struct, and overflows into this second one. */
 534                 char name[FILENAME_MAX + 1];
 535         } buf;
 536         struct pollfd pfd = { .fd = inotify_fd, .events = POLLIN };
 537 #else
 538         struct timespec nowait = { 0, 1 };
 539         int inotify_fd = kqueue();
 540         struct kevent kev;
 541 #endif
 542         struct direntry *cur;
 543
 544         while (!ast_fully_booted) {
 545                 nanosleep(&ts, NULL);
 546         }
 547
 548         if (inotify_fd < 0) {
 549                 ast_log(LOG_ERROR, "Unable to initialize "
 550 #ifdef HAVE_INOTIFY
 551                         "inotify(7)"
 552 #else
 553                         "kqueue(2)"
 554 #endif
 555                         "\n");
 556                 return NULL;
 557         }
 558
 559 #ifdef HAVE_INOTIFY
 560         inotify_add_watch(inotify_fd, qdir, IN_CLOSE_WRITE | IN_MOVED_TO);
 561 #endif
 562
 563         /* First, run through the directory and clear existing entries */
 564         if (!(dir = opendir(qdir))) {
 565                 ast_log(LOG_ERROR, "Unable to open directory %s: %s\n", qdir, strerror(errno));
 566                 return NULL;
 567         }
 568
 569 #ifndef HAVE_INOTIFY
 570         EV_SET(&kev, dirfd(dir), EVFILT_VNODE, EV_ADD | EV_ENABLE, NOTE_WRITE | NOTE_EXTEND | NOTE_DELETE | NOTE_REVOKE | NOTE_ATTRIB, 0, NULL);
 571         if (kevent(inotify_fd, &kev, 1, NULL, 0, &nowait) < 0 && errno != 0) {
 572                 ast_log(LOG_ERROR, "Unable to watch directory %s: %s\n", qdir, strerror(errno));
 573         }
 574 #endif
 575         now = time(NULL);
 576         while ((de = readdir(dir))) {
 577                 queue_file(de->d_name, 0);
 578         }
 579
 580 #ifdef HAVE_INOTIFY
 581         /* Directory needs to remain open for kqueue(2) */
 582         closedir(dir);
 583 #endif
 584
 585         /* Wait for either a) next timestamp to occur, or b) a change to happen */
 586         for (;/* ever */;) {
 587                 time_t next = AST_LIST_EMPTY(&dirlist) ? INT_MAX : AST_LIST_FIRST(&dirlist)->mtime;
 588
 589                 time(&now);
 590                 if (next > now) {
 591 #ifdef HAVE_INOTIFY
 592                         int stage = 0;
 593                         /* Convert from seconds to milliseconds, unless there's nothing
 594                          * in the queue already, in which case, we wait forever. */
 595                         int waittime = next == INT_MAX ? -1 : (next - now) * 1000;
 596                         /* When a file arrives, add it to the queue, in mtime order. */
 597                         if ((res = poll(&pfd, 1, waittime)) > 0 && (stage = 1) &&
 598                                 (res = read(inotify_fd, &buf, sizeof(buf))) >= sizeof(buf.iev)) {
 599                                 /* File(s) added to directory, add them to my list */
 600                                 do {
 601                                         queue_file(buf.iev.name, 0);
 602                                         res -= sizeof(buf.iev) + buf.iev.len;
 603                                         if (res >= sizeof(buf.iev)) {
 604                                                 memmove(&buf.iev, &buf.iev.name[buf.iev.len], res);
 605                                                 continue;
 606                                         }
 607                                         break;
 608                                 } while (1);
 609                         } else if (res < 0 && errno != EINTR && errno != EAGAIN) {
 610                                 ast_debug(1, "Got an error back from %s(2): %s\n", stage ? "read" : "poll", strerror(errno));
 611                         }
 612 #else
 613                         struct timespec ts2 = { next - now, 0 };
 614                         if (kevent(inotify_fd, NULL, 0, &kev, 1, &ts2) <= 0) {
 615                                 /* Interrupt or timeout, restart calculations */
 616                                 continue;
 617                         } else {
 618                                 /* Directory changed, rescan */
 619                                 rewinddir(dir);
 620                                 while ((de = readdir(dir))) {
 621                                         queue_file(de->d_name, 0);
 622                                 }
 623                         }
 624 #endif
 625                         time(&now);
 626                 }
 627
 628                 /* Empty the list of all entries ready to be processed */
 629                 while (!AST_LIST_EMPTY(&dirlist) && AST_LIST_FIRST(&dirlist)->mtime <= now) {
 630                         cur = AST_LIST_REMOVE_HEAD(&dirlist, list);
 631                         queue_file(cur->name, cur->mtime);
 632                         ast_free(cur);
 633                 }
 634         }
 635         return NULL;
 636 }
 637
 638 #else
 639 static void *scan_thread(void *unused)
 640 {
 641         struct stat st;
 642         DIR *dir;
 643         struct dirent *de;
 644         char fn[256];
 645         int res;
 646         time_t last = 0, next = 0, now;
 647         struct timespec ts = { .tv_sec = 1 };
 648
 649         while (!ast_fully_booted) {
 650                 nanosleep(&ts, NULL);
 651         }
 652
 653         for(;;) {
 654                 /* Wait a sec */
 655                 nanosleep(&ts, NULL);
 656                 time(&now);
 657
 658                 if (stat(qdir, &st)) {
 659                         ast_log(LOG_WARNING, "Unable to stat %s\n", qdir);
 660                         continue;
 661                 }
 662
 663                 /* Make sure it is time for us to execute our check */
 664                 if ((st.st_mtime == last) && (next && (next > now)))
 665                         continue;
 666
 667 #if 0
 668                 printf("atime: %ld, mtime: %ld, ctime: %ld\n", st.st_atime, st.st_mtime, st.st_ctime);
 669                 printf("Ooh, something changed / timeout\n");
 670 #endif
 671                 next = 0;
 672                 last = st.st_mtime;
 673
 674                 if (!(dir = opendir(qdir))) {
 675                         ast_log(LOG_WARNING, "Unable to open directory %s: %s\n", qdir, strerror(errno));
 676                         continue;
 677                 }
 678
 679                 while ((de = readdir(dir))) {
 680                         snprintf(fn, sizeof(fn), "%s/%s", qdir, de->d_name);
 681                         if (stat(fn, &st)) {
 682                                 ast_log(LOG_WARNING, "Unable to stat %s: %s\n", fn, strerror(errno));
 683                                 continue;
 684                         }
 685                         if (!S_ISREG(st.st_mode))
 686                                 continue;
 687                         if (st.st_mtime <= now) {
 688                                 res = scan_service(fn, now);
 689                                 if (res > 0) {
 690                                         /* Update next service time */
 691                                         if (!next || (res < next)) {
 692                                                 next = res;
 693                                         }
 694                                 } else if (res) {
 695                                         ast_log(LOG_WARNING, "Failed to scan service '%s'\n", fn);
 696                                 } else if (!next) {
 697                                         /* Expired entry: must recheck on the next go-around */
 698                                         next = st.st_mtime;
 699                                 }
 700                         } else {
 701                                 /* Update "next" update if necessary */
 702                                 if (!next || (st.st_mtime < next))
 703                                         next = st.st_mtime;
 704                         }
 705                 }
 706                 closedir(dir);
 707         }
 708         return NULL;
 709 }
 710 #endif
 711
 712 static int unload_module(void)
 713 {
 714         return -1;
 715 }
 716
 717 static int load_module(void)
 718 {
 719         pthread_t thread;
 720         int ret;
 721         snprintf(qdir, sizeof(qdir), "%s/%s", ast_config_AST_SPOOL_DIR, "outgoing");
 722         if (ast_mkdir(qdir, 0777)) {
 723                 ast_log(LOG_WARNING, "Unable to create queue directory %s -- outgoing spool disabled\n", qdir);
 724                 return AST_MODULE_LOAD_DECLINE;
 725         }
 726         snprintf(qdonedir, sizeof(qdir), "%s/%s", ast_config_AST_SPOOL_DIR, "outgoing_done");
 727
 728         if ((ret = ast_pthread_create_detached_background(&thread, NULL, scan_thread, NULL))) {
 729                 ast_log(LOG_WARNING, "Unable to create thread :( (returned error: %d)\n", ret);
 730                 return AST_MODULE_LOAD_FAILURE;
 731         }
 732
 733         return AST_MODULE_LOAD_SUCCESS;
 734 }
 735
 736 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Outgoing Spool Support");