main/logger.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2006, 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 Asterisk Logger
  22  *
  23  * Logging routines
  24  *
  25  * \author Mark Spencer <markster@digium.com>
  26  */
  27
  28 #include "asterisk.h"
  29
  30 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  31
  32 /* When we include logger.h again it will trample on some stuff in syslog.h, but
  33  * nothing we care about in here. */
  34 #include <syslog.h>
  35
  36 #include "asterisk/_private.h"
  37 #include "asterisk/paths.h"     /* use ast_config_AST_LOG_DIR */
  38 #include "asterisk/logger.h"
  39 #include "asterisk/lock.h"
  40 #include "asterisk/channel.h"
  41 #include "asterisk/config.h"
  42 #include "asterisk/term.h"
  43 #include "asterisk/cli.h"
  44 #include "asterisk/utils.h"
  45 #include "asterisk/manager.h"
  46 #include "asterisk/threadstorage.h"
  47 #include "asterisk/strings.h"
  48 #include "asterisk/pbx.h"
  49 #include "asterisk/app.h"
  50 #include "asterisk/syslog.h"
  51
  52 #include <signal.h>
  53 #include <time.h>
  54 #include <sys/stat.h>
  55 #include <fcntl.h>
  56 #ifdef HAVE_BKTR
  57 #include <execinfo.h>
  58 #define MAX_BACKTRACE_FRAMES 20
  59 #endif
  60
  61 #if defined(__linux__) && !defined(__NR_gettid)
  62 #include <asm/unistd.h>
  63 #endif
  64
  65 #if defined(__linux__) && defined(__NR_gettid)
  66 #define GETTID() syscall(__NR_gettid)
  67 #else
  68 #define GETTID() getpid()
  69 #endif
  70 static char dateformat[256] = "%b %e %T";               /* Original Asterisk Format */
  71
  72 static char queue_log_name[256] = QUEUELOG;
  73 static char exec_after_rotate[256] = "";
  74
  75 static int filesize_reload_needed;
  76 static unsigned int global_logmask = 0xFFFF;
  77
  78 static enum rotatestrategy {
  79         SEQUENTIAL = 1 << 0,     /* Original method - create a new file, in order */
  80         ROTATE = 1 << 1,         /* Rotate all files, such that the oldest file has the highest suffix */
  81         TIMESTAMP = 1 << 2,      /* Append the epoch timestamp onto the end of the archived file */
  82 } rotatestrategy = SEQUENTIAL;
  83
  84 static struct {
  85         unsigned int queue_log:1;
  86 } logfiles = { 1 };
  87
  88 static char hostname[MAXHOSTNAMELEN];
  89
  90 enum logtypes {
  91         LOGTYPE_SYSLOG,
  92         LOGTYPE_FILE,
  93         LOGTYPE_CONSOLE,
  94 };
  95
  96 struct logchannel {
  97         /*! What to log to this channel */
  98         unsigned int logmask;
  99         /*! If this channel is disabled or not */
 100         int disabled;
 101         /*! syslog facility */
 102         int facility;
 103         /*! Type of log channel */
 104         enum logtypes type;
 105         /*! logfile logging file pointer */
 106         FILE *fileptr;
 107         /*! Filename */
 108         char filename[PATH_MAX];
 109         /*! field for linking to list */
 110         AST_LIST_ENTRY(logchannel) list;
 111         /*! Line number from configuration file */
 112         int lineno;
 113         /*! Components (levels) from last config load */
 114         char components[0];
 115 };
 116
 117 static AST_RWLIST_HEAD_STATIC(logchannels, logchannel);
 118
 119 enum logmsgtypes {
 120         LOGMSG_NORMAL = 0,
 121         LOGMSG_VERBOSE,
 122 };
 123
 124 struct logmsg {
 125         enum logmsgtypes type;
 126         int level;
 127         int line;
 128         long process_id;
 129         AST_DECLARE_STRING_FIELDS(
 130                 AST_STRING_FIELD(date);
 131                 AST_STRING_FIELD(file);
 132                 AST_STRING_FIELD(function);
 133                 AST_STRING_FIELD(message);
 134                 AST_STRING_FIELD(level_name);
 135         );
 136         AST_LIST_ENTRY(logmsg) list;
 137 };
 138
 139 static AST_LIST_HEAD_STATIC(logmsgs, logmsg);
 140 static pthread_t logthread = AST_PTHREADT_NULL;
 141 static ast_cond_t logcond;
 142 static int close_logger_thread = 0;
 143
 144 static FILE *qlog;
 145
 146 /*! \brief Logging channels used in the Asterisk logging system
 147  *
 148  * The first 16 levels are reserved for system usage, and the remaining
 149  * levels are reserved for usage by dynamic levels registered via
 150  * ast_logger_register_level.
 151  */
 152
 153 /* Modifications to this array are protected by the rwlock in the
 154  * logchannels list.
 155  */
 156
 157 static char *levels[32] = {
 158         "DEBUG",
 159         "---EVENT---",          /* no longer used */
 160         "NOTICE",
 161         "WARNING",
 162         "ERROR",
 163         "VERBOSE",
 164         "DTMF",
 165 };
 166
 167 /*! \brief Colors used in the console for logging */
 168 static const int colors[32] = {
 169         COLOR_BRGREEN,
 170         COLOR_BRBLUE,           /* no longer used */
 171         COLOR_YELLOW,
 172         COLOR_BRRED,
 173         COLOR_RED,
 174         COLOR_GREEN,
 175         COLOR_BRGREEN,
 176         0,
 177         0,
 178         0,
 179         0,
 180         0,
 181         0,
 182         0,
 183         0,
 184         0,
 185         COLOR_BRBLUE,
 186         COLOR_BRBLUE,
 187         COLOR_BRBLUE,
 188         COLOR_BRBLUE,
 189         COLOR_BRBLUE,
 190         COLOR_BRBLUE,
 191         COLOR_BRBLUE,
 192         COLOR_BRBLUE,
 193         COLOR_BRBLUE,
 194         COLOR_BRBLUE,
 195         COLOR_BRBLUE,
 196         COLOR_BRBLUE,
 197         COLOR_BRBLUE,
 198         COLOR_BRBLUE,
 199         COLOR_BRBLUE,
 200         COLOR_BRBLUE,
 201 };
 202
 203 AST_THREADSTORAGE(verbose_buf);
 204 #define VERBOSE_BUF_INIT_SIZE   256
 205
 206 AST_THREADSTORAGE(log_buf);
 207 #define LOG_BUF_INIT_SIZE       256
 208
 209 static unsigned int make_components(const char *s, int lineno)
 210 {
 211         char *w;
 212         unsigned int res = 0;
 213         char *stringp = ast_strdupa(s);
 214         unsigned int x;
 215
 216         while ((w = strsep(&stringp, ","))) {
 217                 w = ast_skip_blanks(w);
 218
 219                 if (!strcmp(w, "*")) {
 220                         res = 0xFFFFFFFF;
 221                         break;
 222                 } else for (x = 0; x < ARRAY_LEN(levels); x++) {
 223                         if (levels[x] && !strcasecmp(w, levels[x])) {
 224                                 res |= (1 << x);
 225                                 break;
 226                         }
 227                 }
 228         }
 229
 230         return res;
 231 }
 232
 233 static struct logchannel *make_logchannel(const char *channel, const char *components, int lineno)
 234 {
 235         struct logchannel *chan;
 236         char *facility;
 237
 238         if (ast_strlen_zero(channel) || !(chan = ast_calloc(1, sizeof(*chan) + strlen(components) + 1)))
 239                 return NULL;
 240
 241         strcpy(chan->components, components);
 242         chan->lineno = lineno;
 243
 244         if (!strcasecmp(channel, "console")) {
 245                 chan->type = LOGTYPE_CONSOLE;
 246         } else if (!strncasecmp(channel, "syslog", 6)) {
 247                 /*
 248                 * syntax is:
 249                 *  syslog.facility => level,level,level
 250                 */
 251                 facility = strchr(channel, '.');
 252                 if (!facility++ || !facility) {
 253                         facility = "local0";
 254                 }
 255
 256                 chan->facility = ast_syslog_facility(facility);
 257
 258                 if (chan->facility < 0) {
 259                         fprintf(stderr, "Logger Warning: bad syslog facility in logger.conf\n");
 260                         ast_free(chan);
 261                         return NULL;
 262                 }
 263
 264                 chan->type = LOGTYPE_SYSLOG;
 265                 ast_copy_string(chan->filename, channel, sizeof(chan->filename));
 266                 openlog("asterisk", LOG_PID, chan->facility);
 267         } else {
 268                 if (!ast_strlen_zero(hostname)) {
 269                         snprintf(chan->filename, sizeof(chan->filename), "%s/%s.%s",
 270                                  channel[0] != '/' ? ast_config_AST_LOG_DIR : "", channel, hostname);
 271                 } else {
 272                         snprintf(chan->filename, sizeof(chan->filename), "%s/%s",
 273                                  channel[0] != '/' ? ast_config_AST_LOG_DIR : "", channel);
 274                 }
 275                 if (!(chan->fileptr = fopen(chan->filename, "a"))) {
 276                         /* Can't log here, since we're called with a lock */
 277                         fprintf(stderr, "Logger Warning: Unable to open log file '%s': %s\n", chan->filename, strerror(errno));
 278                 }
 279                 chan->type = LOGTYPE_FILE;
 280         }
 281         chan->logmask = make_components(chan->components, lineno);
 282
 283         return chan;
 284 }
 285
 286 static void init_logger_chain(int locked)
 287 {
 288         struct logchannel *chan;
 289         struct ast_config *cfg;
 290         struct ast_variable *var;
 291         const char *s;
 292         struct ast_flags config_flags = { 0 };
 293
 294         if (!(cfg = ast_config_load2("logger.conf", "logger", config_flags)) || cfg == CONFIG_STATUS_FILEINVALID)
 295                 return;
 296
 297         /* delete our list of log channels */
 298         if (!locked)
 299                 AST_RWLIST_WRLOCK(&logchannels);
 300         while ((chan = AST_RWLIST_REMOVE_HEAD(&logchannels, list)))
 301                 ast_free(chan);
 302         global_logmask = 0;
 303         if (!locked)
 304                 AST_RWLIST_UNLOCK(&logchannels);
 305
 306         errno = 0;
 307         /* close syslog */
 308         closelog();
 309
 310         /* If no config file, we're fine, set default options. */
 311         if (!cfg) {
 312                 if (errno)
 313                         fprintf(stderr, "Unable to open logger.conf: %s; default settings will be used.\n", strerror(errno));
 314                 else
 315                         fprintf(stderr, "Errors detected in logger.conf: see above; default settings will be used.\n");
 316                 if (!(chan = ast_calloc(1, sizeof(*chan))))
 317                         return;
 318                 chan->type = LOGTYPE_CONSOLE;
 319                 chan->logmask = __LOG_WARNING | __LOG_NOTICE | __LOG_ERROR;
 320                 if (!locked)
 321                         AST_RWLIST_WRLOCK(&logchannels);
 322                 AST_RWLIST_INSERT_HEAD(&logchannels, chan, list);
 323                 global_logmask |= chan->logmask;
 324                 if (!locked)
 325                         AST_RWLIST_UNLOCK(&logchannels);
 326                 return;
 327         }
 328
 329         if ((s = ast_variable_retrieve(cfg, "general", "appendhostname"))) {
 330                 if (ast_true(s)) {
 331                         if (gethostname(hostname, sizeof(hostname) - 1)) {
 332                                 ast_copy_string(hostname, "unknown", sizeof(hostname));
 333                                 fprintf(stderr, "What box has no hostname???\n");
 334                         }
 335                 } else
 336                         hostname[0] = '\0';
 337         } else
 338                 hostname[0] = '\0';
 339         if ((s = ast_variable_retrieve(cfg, "general", "dateformat")))
 340                 ast_copy_string(dateformat, s, sizeof(dateformat));
 341         else
 342                 ast_copy_string(dateformat, "%b %e %T", sizeof(dateformat));
 343         if ((s = ast_variable_retrieve(cfg, "general", "queue_log")))
 344                 logfiles.queue_log = ast_true(s);
 345         if ((s = ast_variable_retrieve(cfg, "general", "queue_log_name")))
 346                 ast_copy_string(queue_log_name, s, sizeof(queue_log_name));
 347         if ((s = ast_variable_retrieve(cfg, "general", "exec_after_rotate")))
 348                 ast_copy_string(exec_after_rotate, s, sizeof(exec_after_rotate));
 349         if ((s = ast_variable_retrieve(cfg, "general", "rotatestrategy"))) {
 350                 if (strcasecmp(s, "timestamp") == 0)
 351                         rotatestrategy = TIMESTAMP;
 352                 else if (strcasecmp(s, "rotate") == 0)
 353                         rotatestrategy = ROTATE;
 354                 else if (strcasecmp(s, "sequential") == 0)
 355                         rotatestrategy = SEQUENTIAL;
 356                 else
 357                         fprintf(stderr, "Unknown rotatestrategy: %s\n", s);
 358         } else {
 359                 if ((s = ast_variable_retrieve(cfg, "general", "rotatetimestamp"))) {
 360                         rotatestrategy = ast_true(s) ? TIMESTAMP : SEQUENTIAL;
 361                         fprintf(stderr, "rotatetimestamp option has been deprecated.  Please use rotatestrategy instead.\n");
 362                 }
 363         }
 364
 365         if (!locked)
 366                 AST_RWLIST_WRLOCK(&logchannels);
 367         var = ast_variable_browse(cfg, "logfiles");
 368         for (; var; var = var->next) {
 369                 if (!(chan = make_logchannel(var->name, var->value, var->lineno)))
 370                         continue;
 371                 AST_RWLIST_INSERT_HEAD(&logchannels, chan, list);
 372                 global_logmask |= chan->logmask;
 373         }
 374         if (!locked)
 375                 AST_RWLIST_UNLOCK(&logchannels);
 376
 377         ast_config_destroy(cfg);
 378 }
 379
 380 void ast_child_verbose(int level, const char *fmt, ...)
 381 {
 382         char *msg = NULL, *emsg = NULL, *sptr, *eptr;
 383         va_list ap, aq;
 384         int size;
 385
 386         /* Don't bother, if the level isn't that high */
 387         if (option_verbose < level) {
 388                 return;
 389         }
 390
 391         va_start(ap, fmt);
 392         va_copy(aq, ap);
 393         if ((size = vsnprintf(msg, 0, fmt, ap)) < 0) {
 394                 va_end(ap);
 395                 va_end(aq);
 396                 return;
 397         }
 398         va_end(ap);
 399
 400         if (!(msg = ast_malloc(size + 1))) {
 401                 va_end(aq);
 402                 return;
 403         }
 404
 405         vsnprintf(msg, size + 1, fmt, aq);
 406         va_end(aq);
 407
 408         if (!(emsg = ast_malloc(size * 2 + 1))) {
 409                 ast_free(msg);
 410                 return;
 411         }
 412
 413         for (sptr = msg, eptr = emsg; ; sptr++) {
 414                 if (*sptr == '"') {
 415                         *eptr++ = '\\';
 416                 }
 417                 *eptr++ = *sptr;
 418                 if (*sptr == '\0') {
 419                         break;
 420                 }
 421         }
 422         ast_free(msg);
 423
 424         fprintf(stdout, "verbose \"%s\" %d\n", emsg, level);
 425         fflush(stdout);
 426         ast_free(emsg);
 427 }
 428
 429 void ast_queue_log(const char *queuename, const char *callid, const char *agent, const char *event, const char *fmt, ...)
 430 {
 431         va_list ap;
 432         char qlog_msg[8192];
 433         int qlog_len;
 434         char time_str[16];
 435
 436         if (ast_check_realtime("queue_log")) {
 437                 va_start(ap, fmt);
 438                 vsnprintf(qlog_msg, sizeof(qlog_msg), fmt, ap);
 439                 va_end(ap);
 440                 snprintf(time_str, sizeof(time_str), "%ld", (long)time(NULL));
 441                 ast_store_realtime("queue_log", "time", time_str,
 442                                                 "callid", callid,
 443                                                 "queuename", queuename,
 444                                                 "agent", agent,
 445                                                 "event", event,
 446                                                 "data", qlog_msg,
 447                                                 SENTINEL);
 448         } else {
 449                 if (qlog) {
 450                         va_start(ap, fmt);
 451                         qlog_len = snprintf(qlog_msg, sizeof(qlog_msg), "%ld|%s|%s|%s|%s|", (long)time(NULL), callid, queuename, agent, event);
 452                         vsnprintf(qlog_msg + qlog_len, sizeof(qlog_msg) - qlog_len, fmt, ap);
 453                         va_end(ap);
 454                 }
 455                 AST_RWLIST_RDLOCK(&logchannels);
 456                 if (qlog) {
 457                         fprintf(qlog, "%s\n", qlog_msg);
 458                         fflush(qlog);
 459                 }
 460                 AST_RWLIST_UNLOCK(&logchannels);
 461         }
 462 }
 463
 464 static int rotate_file(const char *filename)
 465 {
 466         char old[PATH_MAX];
 467         char new[PATH_MAX];
 468         int x, y, which, found, res = 0, fd;
 469         char *suffixes[4] = { "", ".gz", ".bz2", ".Z" };
 470
 471         switch (rotatestrategy) {
 472         case SEQUENTIAL:
 473                 for (x = 0; ; x++) {
 474                         snprintf(new, sizeof(new), "%s.%d", filename, x);
 475                         fd = open(new, O_RDONLY);
 476                         if (fd > -1)
 477                                 close(fd);
 478                         else
 479                                 break;
 480                 }
 481                 if (rename(filename, new)) {
 482                         fprintf(stderr, "Unable to rename file '%s' to '%s'\n", filename, new);
 483                         res = -1;
 484                 }
 485                 break;
 486         case TIMESTAMP:
 487                 snprintf(new, sizeof(new), "%s.%ld", filename, (long)time(NULL));
 488                 if (rename(filename, new)) {
 489                         fprintf(stderr, "Unable to rename file '%s' to '%s'\n", filename, new);
 490                         res = -1;
 491                 }
 492                 break;
 493         case ROTATE:
 494                 /* Find the next empty slot, including a possible suffix */
 495                 for (x = 0; ; x++) {
 496                         found = 0;
 497                         for (which = 0; which < ARRAY_LEN(suffixes); which++) {
 498                                 snprintf(new, sizeof(new), "%s.%d%s", filename, x, suffixes[which]);
 499                                 fd = open(new, O_RDONLY);
 500                                 if (fd > -1) {
 501                                         close(fd);
 502                                         found = 1;
 503                                         break;
 504                                 }
 505                         }
 506                         if (!found) {
 507                                 break;
 508                         }
 509                 }
 510
 511                 /* Found an empty slot */
 512                 for (y = x; y > 0; y--) {
 513                         for (which = 0; which < ARRAY_LEN(suffixes); which++) {
 514                                 snprintf(old, sizeof(old), "%s.%d%s", filename, y - 1, suffixes[which]);
 515                                 fd = open(old, O_RDONLY);
 516                                 if (fd > -1) {
 517                                         /* Found the right suffix */
 518                                         close(fd);
 519                                         snprintf(new, sizeof(new), "%s.%d%s", filename, y, suffixes[which]);
 520                                         if (rename(old, new)) {
 521                                                 fprintf(stderr, "Unable to rename file '%s' to '%s'\n", old, new);
 522                                                 res = -1;
 523                                         }
 524                                         break;
 525                                 }
 526                         }
 527                 }
 528
 529                 /* Finally, rename the current file */
 530                 snprintf(new, sizeof(new), "%s.0", filename);
 531                 if (rename(filename, new)) {
 532                         fprintf(stderr, "Unable to rename file '%s' to '%s'\n", filename, new);
 533                         res = -1;
 534                 }
 535         }
 536
 537         if (!ast_strlen_zero(exec_after_rotate)) {
 538                 struct ast_channel *c = ast_dummy_channel_alloc();
 539                 char buf[512];
 540                 pbx_builtin_setvar_helper(c, "filename", filename);
 541                 pbx_substitute_variables_helper(c, exec_after_rotate, buf, sizeof(buf));
 542                 if (ast_safe_system(buf) == -1) {
 543                         ast_log(LOG_WARNING, "error executing '%s'\n", buf);
 544                 }
 545                 c = ast_channel_release(c);
 546         }
 547         return res;
 548 }
 549
 550 static int reload_logger(int rotate)
 551 {
 552         char old[PATH_MAX] = "";
 553         int queue_rotate = rotate;
 554         struct logchannel *f;
 555         int res = 0;
 556         struct stat st;
 557
 558         AST_RWLIST_WRLOCK(&logchannels);
 559
 560         if (qlog) {
 561                 if (rotate < 0) {
 562                         /* Check filesize - this one typically doesn't need an auto-rotate */
 563                         snprintf(old, sizeof(old), "%s/%s", ast_config_AST_LOG_DIR, queue_log_name);
 564                         if (stat(old, &st) != 0 || st.st_size > 0x40000000) { /* Arbitrarily, 1 GB */
 565                                 fclose(qlog);
 566                                 qlog = NULL;
 567                         } else
 568                                 queue_rotate = 0;
 569                 } else {
 570                         fclose(qlog);
 571                         qlog = NULL;
 572                 }
 573         } else
 574                 queue_rotate = 0;
 575
 576         ast_mkdir(ast_config_AST_LOG_DIR, 0777);
 577
 578         AST_RWLIST_TRAVERSE(&logchannels, f, list) {
 579                 if (f->disabled) {
 580                         f->disabled = 0;        /* Re-enable logging at reload */
 581                         manager_event(EVENT_FLAG_SYSTEM, "LogChannel", "Channel: %s\r\nEnabled: Yes\r\n", f->filename);
 582                 }
 583                 if (f->fileptr && (f->fileptr != stdout) && (f->fileptr != stderr)) {
 584                         fclose(f->fileptr);     /* Close file */
 585                         f->fileptr = NULL;
 586                         if (rotate)
 587                                 rotate_file(f->filename);
 588                 }
 589         }
 590
 591         filesize_reload_needed = 0;
 592
 593         init_logger_chain(1 /* locked */);
 594
 595         if (logfiles.queue_log) {
 596                 snprintf(old, sizeof(old), "%s/%s", ast_config_AST_LOG_DIR, queue_log_name);
 597                 if (queue_rotate)
 598                         rotate_file(old);
 599
 600                 qlog = fopen(old, "a");
 601                 if (qlog) {
 602                         AST_RWLIST_UNLOCK(&logchannels);
 603                         ast_queue_log("NONE", "NONE", "NONE", "CONFIGRELOAD", "%s", "");
 604                         AST_RWLIST_WRLOCK(&logchannels);
 605                         ast_verb(1, "Asterisk Queue Logger restarted\n");
 606                 } else {
 607                         ast_log(LOG_ERROR, "Unable to create queue log: %s\n", strerror(errno));
 608                         res = -1;
 609                 }
 610         }
 611
 612         AST_RWLIST_UNLOCK(&logchannels);
 613
 614         return res;
 615 }
 616
 617 /*! \brief Reload the logger module without rotating log files (also used from loader.c during
 618         a full Asterisk reload) */
 619 int logger_reload(void)
 620 {
 621         if(reload_logger(0))
 622                 return RESULT_FAILURE;
 623         return RESULT_SUCCESS;
 624 }
 625
 626 static char *handle_logger_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 627 {
 628         switch (cmd) {
 629         case CLI_INIT:
 630                 e->command = "logger reload";
 631                 e->usage =
 632                         "Usage: logger reload\n"
 633                         "       Reloads the logger subsystem state.  Use after restarting syslogd(8) if you are using syslog logging.\n";
 634                 return NULL;
 635         case CLI_GENERATE:
 636                 return NULL;
 637         }
 638         if (reload_logger(0)) {
 639                 ast_cli(a->fd, "Failed to reload the logger\n");
 640                 return CLI_FAILURE;
 641         }
 642         return CLI_SUCCESS;
 643 }
 644
 645 static char *handle_logger_rotate(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 646 {
 647         switch (cmd) {
 648         case CLI_INIT:
 649                 e->command = "logger rotate";
 650                 e->usage =
 651                         "Usage: logger rotate\n"
 652                         "       Rotates and Reopens the log files.\n";
 653                 return NULL;
 654         case CLI_GENERATE:
 655                 return NULL;
 656         }
 657         if (reload_logger(1)) {
 658                 ast_cli(a->fd, "Failed to reload the logger and rotate log files\n");
 659                 return CLI_FAILURE;
 660         }
 661         return CLI_SUCCESS;
 662 }
 663
 664 static char *handle_logger_set_level(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 665 {
 666         int x;
 667         int state;
 668         int level = -1;
 669
 670         switch (cmd) {
 671         case CLI_INIT:
 672                 e->command = "logger set level {DEBUG|NOTICE|WARNING|ERROR|VERBOSE|DTMF} {on|off}";
 673                 e->usage =
 674                         "Usage: logger set level {DEBUG|NOTICE|WARNING|ERROR|VERBOSE|DTMF} {on|off}\n"
 675                         "       Set a specific log level to enabled/disabled for this console.\n";
 676                 return NULL;
 677         case CLI_GENERATE:
 678                 return NULL;
 679         }
 680
 681         if (a->argc < 5)
 682                 return CLI_SHOWUSAGE;
 683
 684         AST_RWLIST_WRLOCK(&logchannels);
 685
 686         for (x = 0; x < ARRAY_LEN(levels); x++) {
 687                 if (levels[x] && !strcasecmp(a->argv[3], levels[x])) {
 688                         level = x;
 689                         break;
 690                 }
 691         }
 692
 693         AST_RWLIST_UNLOCK(&logchannels);
 694
 695         state = ast_true(a->argv[4]) ? 1 : 0;
 696
 697         if (level != -1) {
 698                 ast_console_toggle_loglevel(a->fd, level, state);
 699                 ast_cli(a->fd, "Logger status for '%s' has been set to '%s'.\n", levels[level], state ? "on" : "off");
 700         } else
 701                 return CLI_SHOWUSAGE;
 702
 703         return CLI_SUCCESS;
 704 }
 705
 706 /*! \brief CLI command to show logging system configuration */
 707 static char *handle_logger_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 708 {
 709 #define FORMATL "%-35.35s %-8.8s %-9.9s "
 710         struct logchannel *chan;
 711         switch (cmd) {
 712         case CLI_INIT:
 713                 e->command = "logger show channels";
 714                 e->usage =
 715                         "Usage: logger show channels\n"
 716                         "       List configured logger channels.\n";
 717                 return NULL;
 718         case CLI_GENERATE:
 719                 return NULL;
 720         }
 721         ast_cli(a->fd, FORMATL, "Channel", "Type", "Status");
 722         ast_cli(a->fd, "Configuration\n");
 723         ast_cli(a->fd, FORMATL, "-------", "----", "------");
 724         ast_cli(a->fd, "-------------\n");
 725         AST_RWLIST_RDLOCK(&logchannels);
 726         AST_RWLIST_TRAVERSE(&logchannels, chan, list) {
 727                 unsigned int level;
 728
 729                 ast_cli(a->fd, FORMATL, chan->filename, chan->type == LOGTYPE_CONSOLE ? "Console" : (chan->type == LOGTYPE_SYSLOG ? "Syslog" : "File"),
 730                         chan->disabled ? "Disabled" : "Enabled");
 731                 ast_cli(a->fd, " - ");
 732                 for (level = 0; level < ARRAY_LEN(levels); level++) {
 733                         if (chan->logmask & (1 << level)) {
 734                                 ast_cli(a->fd, "%s ", levels[level]);
 735                         }
 736                 }
 737                 ast_cli(a->fd, "\n");
 738         }
 739         AST_RWLIST_UNLOCK(&logchannels);
 740         ast_cli(a->fd, "\n");
 741
 742         return CLI_SUCCESS;
 743 }
 744
 745 struct verb {
 746         void (*verboser)(const char *string);
 747         AST_LIST_ENTRY(verb) list;
 748 };
 749
 750 static AST_RWLIST_HEAD_STATIC(verbosers, verb);
 751
 752 static struct ast_cli_entry cli_logger[] = {
 753         AST_CLI_DEFINE(handle_logger_show_channels, "List configured log channels"),
 754         AST_CLI_DEFINE(handle_logger_reload, "Reopens the log files"),
 755         AST_CLI_DEFINE(handle_logger_rotate, "Rotates and reopens the log files"),
 756         AST_CLI_DEFINE(handle_logger_set_level, "Enables/Disables a specific logging level for this console")
 757 };
 758
 759 static int handle_SIGXFSZ(int sig)
 760 {
 761         /* Indicate need to reload */
 762         filesize_reload_needed = 1;
 763         return 0;
 764 }
 765
 766 static void ast_log_vsyslog(struct logmsg *msg)
 767 {
 768         char buf[BUFSIZ];
 769         int syslog_level = ast_syslog_priority_from_loglevel(msg->level);
 770
 771         if (syslog_level < 0) {
 772                 /* we are locked here, so cannot ast_log() */
 773                 fprintf(stderr, "ast_log_vsyslog called with bogus level: %d\n", msg->level);
 774                 return;
 775         }
 776
 777         if (msg->level == __LOG_VERBOSE) {
 778                 snprintf(buf, sizeof(buf), "VERBOSE[%ld]: %s", msg->process_id, msg->message);
 779                 msg->level = __LOG_DEBUG;
 780         } else if (msg->level == __LOG_DTMF) {
 781                 snprintf(buf, sizeof(buf), "DTMF[%ld]: %s", msg->process_id, msg->message);
 782                 msg->level = __LOG_DEBUG;
 783         } else {
 784                 snprintf(buf, sizeof(buf), "%s[%ld]: %s:%d in %s: %s",
 785                          levels[msg->level], msg->process_id, msg->file, msg->line, msg->function, msg->message);
 786         }
 787
 788         term_strip(buf, buf, strlen(buf) + 1);
 789         syslog(syslog_level, "%s", buf);
 790 }
 791
 792 /*! \brief Print a normal log message to the channels */
 793 static void logger_print_normal(struct logmsg *logmsg)
 794 {
 795         struct logchannel *chan = NULL;
 796         char buf[BUFSIZ];
 797
 798         AST_RWLIST_RDLOCK(&logchannels);
 799
 800         if (!AST_RWLIST_EMPTY(&logchannels)) {
 801                 AST_RWLIST_TRAVERSE(&logchannels, chan, list) {
 802                         /* If the channel is disabled, then move on to the next one */
 803                         if (chan->disabled)
 804                                 continue;
 805                         /* Check syslog channels */
 806                         if (chan->type == LOGTYPE_SYSLOG && (chan->logmask & (1 << logmsg->level))) {
 807                                 ast_log_vsyslog(logmsg);
 808                         /* Console channels */
 809                         } else if (chan->type == LOGTYPE_CONSOLE && (chan->logmask & (1 << logmsg->level))) {
 810                                 char linestr[128];
 811                                 char tmp1[80], tmp2[80], tmp3[80], tmp4[80];
 812
 813                                 /* If the level is verbose, then skip it */
 814                                 if (logmsg->level == __LOG_VERBOSE)
 815                                         continue;
 816
 817                                 /* Turn the numerical line number into a string */
 818                                 snprintf(linestr, sizeof(linestr), "%d", logmsg->line);
 819                                 /* Build string to print out */
 820                                 snprintf(buf, sizeof(buf), "[%s] %s[%ld]: %s:%s %s: %s",
 821                                          logmsg->date,
 822                                          term_color(tmp1, logmsg->level_name, colors[logmsg->level], 0, sizeof(tmp1)),
 823                                          logmsg->process_id,
 824                                          term_color(tmp2, logmsg->file, COLOR_BRWHITE, 0, sizeof(tmp2)),
 825                                          term_color(tmp3, linestr, COLOR_BRWHITE, 0, sizeof(tmp3)),
 826                                          term_color(tmp4, logmsg->function, COLOR_BRWHITE, 0, sizeof(tmp4)),
 827                                          logmsg->message);
 828                                 /* Print out */
 829                                 ast_console_puts_mutable(buf, logmsg->level);
 830                         /* File channels */
 831                         } else if (chan->type == LOGTYPE_FILE && (chan->logmask & (1 << logmsg->level))) {
 832                                 int res = 0;
 833
 834                                 /* If no file pointer exists, skip it */
 835                                 if (!chan->fileptr) {
 836                                         continue;
 837                                 }
 838
 839                                 /* Print out to the file */
 840                                 res = fprintf(chan->fileptr, "[%s] %s[%ld] %s: %s",
 841                                               logmsg->date, logmsg->level_name, logmsg->process_id, logmsg->file, term_strip(buf, logmsg->message, BUFSIZ));
 842                                 if (res <= 0 && !ast_strlen_zero(logmsg->message)) {
 843                                         fprintf(stderr, "**** Asterisk Logging Error: ***********\n");
 844                                         if (errno == ENOMEM || errno == ENOSPC)
 845                                                 fprintf(stderr, "Asterisk logging error: Out of disk space, can't log to log file %s\n", chan->filename);
 846                                         else
 847                                                 fprintf(stderr, "Logger Warning: Unable to write to log file '%s': %s (disabled)\n", chan->filename, strerror(errno));
 848                                         manager_event(EVENT_FLAG_SYSTEM, "LogChannel", "Channel: %s\r\nEnabled: No\r\nReason: %d - %s\r\n", chan->filename, errno, strerror(errno));
 849                                         chan->disabled = 1;
 850                                 } else if (res > 0) {
 851                                         fflush(chan->fileptr);
 852                                 }
 853                         }
 854                 }
 855         } else if (logmsg->level != __LOG_VERBOSE) {
 856                 fputs(logmsg->message, stdout);
 857         }
 858
 859         AST_RWLIST_UNLOCK(&logchannels);
 860
 861         /* If we need to reload because of the file size, then do so */
 862         if (filesize_reload_needed) {
 863                 reload_logger(-1);
 864                 ast_verb(1, "Rotated Logs Per SIGXFSZ (Exceeded file size limit)\n");
 865         }
 866
 867         return;
 868 }
 869
 870 /*! \brief Print a verbose message to the verbosers */
 871 static void logger_print_verbose(struct logmsg *logmsg)
 872 {
 873         struct verb *v = NULL;
 874
 875         /* Iterate through the list of verbosers and pass them the log message string */
 876         AST_RWLIST_RDLOCK(&verbosers);
 877         AST_RWLIST_TRAVERSE(&verbosers, v, list)
 878                 v->verboser(logmsg->message);
 879         AST_RWLIST_UNLOCK(&verbosers);
 880
 881         return;
 882 }
 883
 884 /*! \brief Actual logging thread */
 885 static void *logger_thread(void *data)
 886 {
 887         struct logmsg *next = NULL, *msg = NULL;
 888
 889         for (;;) {
 890                 /* We lock the message list, and see if any message exists... if not we wait on the condition to be signalled */
 891                 AST_LIST_LOCK(&logmsgs);
 892                 if (AST_LIST_EMPTY(&logmsgs)) {
 893                         if (close_logger_thread) {
 894                                 break;
 895                         } else {
 896                                 ast_cond_wait(&logcond, &logmsgs.lock);
 897                         }
 898                 }
 899                 next = AST_LIST_FIRST(&logmsgs);
 900                 AST_LIST_HEAD_INIT_NOLOCK(&logmsgs);
 901                 AST_LIST_UNLOCK(&logmsgs);
 902
 903                 /* Otherwise go through and process each message in the order added */
 904                 while ((msg = next)) {
 905                         /* Get the next entry now so that we can free our current structure later */
 906                         next = AST_LIST_NEXT(msg, list);
 907
 908                         /* Depending on the type, send it to the proper function */
 909                         if (msg->type == LOGMSG_NORMAL)
 910                                 logger_print_normal(msg);
 911                         else if (msg->type == LOGMSG_VERBOSE)
 912                                 logger_print_verbose(msg);
 913
 914                         /* Free the data since we are done */
 915                         ast_free(msg);
 916                 }
 917
 918                 /* If we should stop, then stop */
 919                 if (close_logger_thread)
 920                         break;
 921         }
 922
 923         return NULL;
 924 }
 925
 926 int init_logger(void)
 927 {
 928         char tmp[256];
 929         int res = 0;
 930
 931         /* auto rotate if sig SIGXFSZ comes a-knockin */
 932         (void) signal(SIGXFSZ, (void *) handle_SIGXFSZ);
 933
 934         /* start logger thread */
 935         ast_cond_init(&logcond, NULL);
 936         if (ast_pthread_create(&logthread, NULL, logger_thread, NULL) < 0) {
 937                 ast_cond_destroy(&logcond);
 938                 return -1;
 939         }
 940
 941         /* register the logger cli commands */
 942         ast_cli_register_multiple(cli_logger, ARRAY_LEN(cli_logger));
 943
 944         ast_mkdir(ast_config_AST_LOG_DIR, 0777);
 945
 946         /* create log channels */
 947         init_logger_chain(0 /* locked */);
 948
 949         if (logfiles.queue_log) {
 950                 snprintf(tmp, sizeof(tmp), "%s/%s", ast_config_AST_LOG_DIR, queue_log_name);
 951                 qlog = fopen(tmp, "a");
 952                 ast_queue_log("NONE", "NONE", "NONE", "QUEUESTART", "%s", "");
 953         }
 954         return res;
 955 }
 956
 957 void close_logger(void)
 958 {
 959         struct logchannel *f = NULL;
 960
 961         /* Stop logger thread */
 962         AST_LIST_LOCK(&logmsgs);
 963         close_logger_thread = 1;
 964         ast_cond_signal(&logcond);
 965         AST_LIST_UNLOCK(&logmsgs);
 966
 967         if (logthread != AST_PTHREADT_NULL)
 968                 pthread_join(logthread, NULL);
 969
 970         AST_RWLIST_WRLOCK(&logchannels);
 971
 972         if (qlog) {
 973                 fclose(qlog);
 974                 qlog = NULL;
 975         }
 976
 977         AST_RWLIST_TRAVERSE(&logchannels, f, list) {
 978                 if (f->fileptr && (f->fileptr != stdout) && (f->fileptr != stderr)) {
 979                         fclose(f->fileptr);
 980                         f->fileptr = NULL;
 981                 }
 982         }
 983
 984         closelog(); /* syslog */
 985
 986         AST_RWLIST_UNLOCK(&logchannels);
 987
 988         return;
 989 }
 990
 991 /*!
 992  * \brief send log messages to syslog and/or the console
 993  */
 994 void ast_log(int level, const char *file, int line, const char *function, const char *fmt, ...)
 995 {
 996         struct logmsg *logmsg = NULL;
 997         struct ast_str *buf = NULL;
 998         struct ast_tm tm;
 999         struct timeval now = ast_tvnow();
1000         int res = 0;
1001         va_list ap;
1002         char datestring[256];
1003
1004         if (!(buf = ast_str_thread_get(&log_buf, LOG_BUF_INIT_SIZE)))
1005                 return;
1006
1007         if (AST_RWLIST_EMPTY(&logchannels)) {
1008                 /*
1009                  * we don't have the logger chain configured yet,
1010                  * so just log to stdout
1011                  */
1012                 if (level != __LOG_VERBOSE) {
1013                         int result;
1014                         va_start(ap, fmt);
1015                         result = ast_str_set_va(&buf, BUFSIZ, fmt, ap); /* XXX BUFSIZ ? */
1016                         va_end(ap);
1017                         if (result != AST_DYNSTR_BUILD_FAILED) {
1018                                 term_filter_escapes(ast_str_buffer(buf));
1019                                 fputs(ast_str_buffer(buf), stdout);
1020                         }
1021                 }
1022                 return;
1023         }
1024
1025         /* don't display LOG_DEBUG messages unless option_verbose _or_ option_debug
1026            are non-zero; LOG_DEBUG messages can still be displayed if option_debug
1027            is zero, if option_verbose is non-zero (this allows for 'level zero'
1028            LOG_DEBUG messages to be displayed, if the logmask on any channel
1029            allows it)
1030         */
1031         if (!option_verbose && !option_debug && (level == __LOG_DEBUG))
1032                 return;
1033
1034         /* Ignore anything that never gets logged anywhere */
1035         if (!(global_logmask & (1 << level)))
1036                 return;
1037
1038         /* Build string */
1039         va_start(ap, fmt);
1040         res = ast_str_set_va(&buf, BUFSIZ, fmt, ap);
1041         va_end(ap);
1042
1043         /* If the build failed, then abort and free this structure */
1044         if (res == AST_DYNSTR_BUILD_FAILED)
1045                 return;
1046
1047         /* Create a new logging message */
1048         if (!(logmsg = ast_calloc_with_stringfields(1, struct logmsg, res + 128)))
1049                 return;
1050
1051         /* Copy string over */
1052         ast_string_field_set(logmsg, message, ast_str_buffer(buf));
1053
1054         /* Set type to be normal */
1055         logmsg->type = LOGMSG_NORMAL;
1056
1057         /* Create our date/time */
1058         ast_localtime(&now, &tm, NULL);
1059         ast_strftime(datestring, sizeof(datestring), dateformat, &tm);
1060         ast_string_field_set(logmsg, date, datestring);
1061
1062         /* Copy over data */
1063         logmsg->level = level;
1064         logmsg->line = line;
1065         ast_string_field_set(logmsg, level_name, levels[level]);
1066         ast_string_field_set(logmsg, file, file);
1067         ast_string_field_set(logmsg, function, function);
1068         logmsg->process_id = (long) GETTID();
1069
1070         /* If the logger thread is active, append it to the tail end of the list - otherwise skip that step */
1071         if (logthread != AST_PTHREADT_NULL) {
1072                 AST_LIST_LOCK(&logmsgs);
1073                 AST_LIST_INSERT_TAIL(&logmsgs, logmsg, list);
1074                 ast_cond_signal(&logcond);
1075                 AST_LIST_UNLOCK(&logmsgs);
1076         } else {
1077                 logger_print_normal(logmsg);
1078                 ast_free(logmsg);
1079         }
1080
1081         return;
1082 }
1083
1084 #ifdef HAVE_BKTR
1085
1086 struct ast_bt *ast_bt_create(void)
1087 {
1088         struct ast_bt *bt = ast_calloc(1, sizeof(*bt));
1089         if (!bt) {
1090                 ast_log(LOG_ERROR, "Unable to allocate memory for backtrace structure!\n");
1091                 return NULL;
1092         }
1093
1094         bt->alloced = 1;
1095
1096         ast_bt_get_addresses(bt);
1097
1098         return bt;
1099 }
1100
1101 int ast_bt_get_addresses(struct ast_bt *bt)
1102 {
1103         bt->num_frames = backtrace(bt->addresses, AST_MAX_BT_FRAMES);
1104
1105         return 0;
1106 }
1107
1108 void *ast_bt_destroy(struct ast_bt *bt)
1109 {
1110         if (bt->alloced) {
1111                 ast_free(bt);
1112         }
1113
1114         return NULL;
1115 }
1116
1117 #endif /* HAVE_BKTR */
1118
1119 void ast_backtrace(void)
1120 {
1121 #ifdef HAVE_BKTR
1122         struct ast_bt *bt;
1123         int i = 0;
1124         char **strings;
1125
1126         if (!(bt = ast_bt_create())) {
1127                 ast_log(LOG_WARNING, "Unable to allocate space for backtrace structure\n");
1128                 return;
1129         }
1130
1131         if ((strings = backtrace_symbols(bt->addresses, bt->num_frames))) {
1132                 ast_debug(1, "Got %d backtrace record%c\n", bt->num_frames, bt->num_frames != 1 ? 's' : ' ');
1133                 for (i = 0; i < bt->num_frames; i++) {
1134                         ast_log(LOG_DEBUG, "#%d: [%p] %s\n", i, bt->addresses[i], strings[i]);
1135                 }
1136
1137                 /* MALLOC_DEBUG will erroneously report an error here, unless we undef the macro. */
1138 #undef free
1139                 free(strings);
1140         } else {
1141                 ast_debug(1, "Could not allocate memory for backtrace\n");
1142         }
1143         ast_bt_destroy(bt);
1144 #else
1145         ast_log(LOG_WARNING, "Must run configure with '--with-execinfo' for stack backtraces.\n");
1146 #endif
1147 }
1148
1149 void __ast_verbose_ap(const char *file, int line, const char *func, const char *fmt, va_list ap)
1150 {
1151         struct logmsg *logmsg = NULL;
1152         struct ast_str *buf = NULL;
1153         int res = 0;
1154
1155         if (!(buf = ast_str_thread_get(&verbose_buf, VERBOSE_BUF_INIT_SIZE)))
1156                 return;
1157
1158         if (ast_opt_timestamp) {
1159                 struct timeval now;
1160                 struct ast_tm tm;
1161                 char date[40];
1162                 char *datefmt;
1163
1164                 now = ast_tvnow();
1165                 ast_localtime(&now, &tm, NULL);
1166                 ast_strftime(date, sizeof(date), dateformat, &tm);
1167                 datefmt = alloca(strlen(date) + 3 + strlen(fmt) + 1);
1168                 sprintf(datefmt, "%c[%s] %s", 127, date, fmt);
1169                 fmt = datefmt;
1170         } else {
1171                 char *tmp = alloca(strlen(fmt) + 2);
1172                 sprintf(tmp, "%c%s", 127, fmt);
1173                 fmt = tmp;
1174         }
1175
1176         /* Build string */
1177         res = ast_str_set_va(&buf, 0, fmt, ap);
1178
1179         /* If the build failed then we can drop this allocated message */
1180         if (res == AST_DYNSTR_BUILD_FAILED)
1181                 return;
1182
1183         if (!(logmsg = ast_calloc_with_stringfields(1, struct logmsg, res + 128)))
1184                 return;
1185
1186         ast_string_field_set(logmsg, message, ast_str_buffer(buf));
1187
1188         ast_log(__LOG_VERBOSE, file, line, func, "%s", logmsg->message + 1);
1189
1190         /* Set type */
1191         logmsg->type = LOGMSG_VERBOSE;
1192
1193         /* Add to the list and poke the thread if possible */
1194         if (logthread != AST_PTHREADT_NULL) {
1195                 AST_LIST_LOCK(&logmsgs);
1196                 AST_LIST_INSERT_TAIL(&logmsgs, logmsg, list);
1197                 ast_cond_signal(&logcond);
1198                 AST_LIST_UNLOCK(&logmsgs);
1199         } else {
1200                 logger_print_verbose(logmsg);
1201                 ast_free(logmsg);
1202         }
1203 }
1204
1205 void __ast_verbose(const char *file, int line, const char *func, const char *fmt, ...)
1206 {
1207         va_list ap;
1208
1209         va_start(ap, fmt);
1210         __ast_verbose_ap(file, line, func, fmt, ap);
1211         va_end(ap);
1212 }
1213
1214 /* No new code should use this directly, but we have the ABI for backwards compat */
1215 #undef ast_verbose
1216 void __attribute__((format(printf, 1,2))) ast_verbose(const char *fmt, ...);
1217 void ast_verbose(const char *fmt, ...)
1218 {
1219         va_list ap;
1220
1221         va_start(ap, fmt);
1222         __ast_verbose_ap("", 0, "", fmt, ap);
1223         va_end(ap);
1224 }
1225
1226 int ast_register_verbose(void (*v)(const char *string))
1227 {
1228         struct verb *verb;
1229
1230         if (!(verb = ast_malloc(sizeof(*verb))))
1231                 return -1;
1232
1233         verb->verboser = v;
1234
1235         AST_RWLIST_WRLOCK(&verbosers);
1236         AST_RWLIST_INSERT_HEAD(&verbosers, verb, list);
1237         AST_RWLIST_UNLOCK(&verbosers);
1238
1239         return 0;
1240 }
1241
1242 int ast_unregister_verbose(void (*v)(const char *string))
1243 {
1244         struct verb *cur;
1245
1246         AST_RWLIST_WRLOCK(&verbosers);
1247         AST_RWLIST_TRAVERSE_SAFE_BEGIN(&verbosers, cur, list) {
1248                 if (cur->verboser == v) {
1249                         AST_RWLIST_REMOVE_CURRENT(list);
1250                         ast_free(cur);
1251                         break;
1252                 }
1253         }
1254         AST_RWLIST_TRAVERSE_SAFE_END;
1255         AST_RWLIST_UNLOCK(&verbosers);
1256
1257         return cur ? 0 : -1;
1258 }
1259
1260 static void update_logchannels(void)
1261 {
1262         struct logchannel *cur;
1263
1264         AST_RWLIST_WRLOCK(&logchannels);
1265
1266         global_logmask = 0;
1267
1268         AST_RWLIST_TRAVERSE(&logchannels, cur, list) {
1269                 cur->logmask = make_components(cur->components, cur->lineno);
1270                 global_logmask |= cur->logmask;
1271         }
1272
1273         AST_RWLIST_UNLOCK(&logchannels);
1274 }
1275
1276 int ast_logger_register_level(const char *name)
1277 {
1278         unsigned int level;
1279         unsigned int available = 0;
1280
1281         AST_RWLIST_WRLOCK(&logchannels);
1282
1283         for (level = 0; level < ARRAY_LEN(levels); level++) {
1284                 if ((level >= 16) && !available && !levels[level]) {
1285                         available = level;
1286                         continue;
1287                 }
1288
1289                 if (levels[level] && !strcasecmp(levels[level], name)) {
1290                         ast_log(LOG_WARNING,
1291                                 "Unable to register dynamic logger level '%s': a standard logger level uses that name.\n",
1292                                 name);
1293                         AST_RWLIST_UNLOCK(&logchannels);
1294
1295                         return -1;
1296                 }
1297         }
1298
1299         if (!available) {
1300                 ast_log(LOG_WARNING,
1301                         "Unable to register dynamic logger level '%s'; maximum number of levels registered.\n",
1302                         name);
1303                 AST_RWLIST_UNLOCK(&logchannels);
1304
1305                 return -1;
1306         }
1307
1308         levels[available] = ast_strdup(name);
1309
1310         AST_RWLIST_UNLOCK(&logchannels);
1311
1312         ast_debug(1, "Registered dynamic logger level '%s' with index %d.\n", name, available);
1313
1314         update_logchannels();
1315
1316         return available;
1317 }
1318
1319 void ast_logger_unregister_level(const char *name)
1320 {
1321         unsigned int found = 0;
1322         unsigned int x;
1323
1324         AST_RWLIST_WRLOCK(&logchannels);
1325
1326         for (x = 16; x < ARRAY_LEN(levels); x++) {
1327                 if (!levels[x]) {
1328                         continue;
1329                 }
1330
1331                 if (strcasecmp(levels[x], name)) {
1332                         continue;
1333                 }
1334
1335                 found = 1;
1336                 break;
1337         }
1338
1339         if (found) {
1340                 /* take this level out of the global_logmask, to ensure that no new log messages
1341                  * will be queued for it
1342                  */
1343
1344                 global_logmask &= ~(1 << x);
1345
1346                 free(levels[x]);
1347                 levels[x] = NULL;
1348                 AST_RWLIST_UNLOCK(&logchannels);
1349
1350                 ast_debug(1, "Unregistered dynamic logger level '%s' with index %d.\n", name, x);
1351
1352                 update_logchannels();
1353         } else {
1354                 AST_RWLIST_UNLOCK(&logchannels);
1355         }
1356 }
1357