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