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 /*! \li \ref logger.c uses the configuration file \ref logger.conf
  29  * \addtogroup configuration_file Configuration Files
  30  */
  31
  32 /*!
  33  * \page logger.conf logger.conf
  34  * \verbinclude logger.conf.sample
  35  */
  36
  37 /*** MODULEINFO
  38         <support_level>core</support_level>
  39  ***/
  40
  41 #include "asterisk.h"
  42
  43 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  44
  45 /* When we include logger.h again it will trample on some stuff in syslog.h, but
  46  * nothing we care about in here. */
  47 #include <syslog.h>
  48
  49 #include "asterisk/_private.h"
  50 #include "asterisk/paths.h"     /* use ast_config_AST_LOG_DIR */
  51 #include "asterisk/logger.h"
  52 #include "asterisk/lock.h"
  53 #include "asterisk/channel.h"
  54 #include "asterisk/config.h"
  55 #include "asterisk/term.h"
  56 #include "asterisk/cli.h"
  57 #include "asterisk/utils.h"
  58 #include "asterisk/manager.h"
  59 #include "asterisk/astobj2.h"
  60 #include "asterisk/threadstorage.h"
  61 #include "asterisk/strings.h"
  62 #include "asterisk/pbx.h"
  63 #include "asterisk/app.h"
  64 #include "asterisk/syslog.h"
  65 #include "asterisk/buildinfo.h"
  66 #include "asterisk/ast_version.h"
  67
  68 #include <signal.h>
  69 #include <time.h>
  70 #include <sys/stat.h>
  71 #include <fcntl.h>
  72 #ifdef HAVE_BKTR
  73 #include <execinfo.h>
  74 #define MAX_BACKTRACE_FRAMES 20
  75 #  if defined(HAVE_DLADDR) && defined(HAVE_BFD) && defined(BETTER_BACKTRACES)
  76 #    include <dlfcn.h>
  77 #    include <bfd.h>
  78 #  endif
  79 #endif
  80
  81 /*** DOCUMENTATION
  82  ***/
  83
  84 static char dateformat[256] = "%b %e %T";               /* Original Asterisk Format */
  85
  86 static char queue_log_name[256] = QUEUELOG;
  87 static char exec_after_rotate[256] = "";
  88
  89 static int filesize_reload_needed;
  90 static unsigned int global_logmask = 0xFFFF;
  91 static int queuelog_init;
  92 static int logger_initialized;
  93 static volatile int next_unique_callid; /* Used to assign unique call_ids to calls */
  94 static int display_callids;
  95 static void unique_callid_cleanup(void *data);
  96
  97 struct ast_callid {
  98     int call_identifier; /* Numerical value of the call displayed in the logs */
  99 };
 100
 101 AST_THREADSTORAGE_CUSTOM(unique_callid, NULL, unique_callid_cleanup);
 102
 103 static enum rotatestrategy {
 104         NONE = 0,                /* Do not rotate log files at all, instead rely on external mechanisms */
 105         SEQUENTIAL = 1 << 0,     /* Original method - create a new file, in order */
 106         ROTATE = 1 << 1,         /* Rotate all files, such that the oldest file has the highest suffix */
 107         TIMESTAMP = 1 << 2,      /* Append the epoch timestamp onto the end of the archived file */
 108 } rotatestrategy = SEQUENTIAL;
 109
 110 static struct {
 111         unsigned int queue_log:1;
 112         unsigned int queue_log_to_file:1;
 113         unsigned int queue_adaptive_realtime:1;
 114         unsigned int queue_log_realtime_use_gmt:1;
 115 } logfiles = { 1 };
 116
 117 static char hostname[MAXHOSTNAMELEN];
 118
 119 enum logtypes {
 120         LOGTYPE_SYSLOG,
 121         LOGTYPE_FILE,
 122         LOGTYPE_CONSOLE,
 123 };
 124
 125 struct logchannel {
 126         /*! What to log to this channel */
 127         unsigned int logmask;
 128         /*! If this channel is disabled or not */
 129         int disabled;
 130         /*! syslog facility */
 131         int facility;
 132         /*! Verbosity level */
 133         int verbosity;
 134         /*! Type of log channel */
 135         enum logtypes type;
 136         /*! logfile logging file pointer */
 137         FILE *fileptr;
 138         /*! Filename */
 139         char filename[PATH_MAX];
 140         /*! field for linking to list */
 141         AST_LIST_ENTRY(logchannel) list;
 142         /*! Line number from configuration file */
 143         int lineno;
 144         /*! Components (levels) from last config load */
 145         char components[0];
 146 };
 147
 148 static AST_RWLIST_HEAD_STATIC(logchannels, logchannel);
 149
 150 enum logmsgtypes {
 151         LOGMSG_NORMAL = 0,
 152         LOGMSG_VERBOSE,
 153 };
 154
 155 struct logmsg {
 156         enum logmsgtypes type;
 157         int level;
 158         int line;
 159         int lwp;
 160         struct ast_callid *callid;
 161         AST_DECLARE_STRING_FIELDS(
 162                 AST_STRING_FIELD(date);
 163                 AST_STRING_FIELD(file);
 164                 AST_STRING_FIELD(function);
 165                 AST_STRING_FIELD(message);
 166                 AST_STRING_FIELD(level_name);
 167         );
 168         AST_LIST_ENTRY(logmsg) list;
 169 };
 170
 171 static void logmsg_free(struct logmsg *msg)
 172 {
 173         if (msg->callid) {
 174                 ast_callid_unref(msg->callid);
 175         }
 176         ast_free(msg);
 177 }
 178
 179 static AST_LIST_HEAD_STATIC(logmsgs, logmsg);
 180 static pthread_t logthread = AST_PTHREADT_NULL;
 181 static ast_cond_t logcond;
 182 static int close_logger_thread = 0;
 183
 184 static FILE *qlog;
 185
 186 /*! \brief Logging channels used in the Asterisk logging system
 187  *
 188  * The first 16 levels are reserved for system usage, and the remaining
 189  * levels are reserved for usage by dynamic levels registered via
 190  * ast_logger_register_level.
 191  */
 192
 193 /* Modifications to this array are protected by the rwlock in the
 194  * logchannels list.
 195  */
 196
 197 static char *levels[NUMLOGLEVELS] = {
 198         "DEBUG",
 199         "---EVENT---",          /* no longer used */
 200         "NOTICE",
 201         "WARNING",
 202         "ERROR",
 203         "VERBOSE",
 204         "DTMF",
 205 };
 206
 207 /*! \brief Colors used in the console for logging */
 208 static const int colors[NUMLOGLEVELS] = {
 209         COLOR_BRGREEN,
 210         COLOR_BRBLUE,           /* no longer used */
 211         COLOR_YELLOW,
 212         COLOR_BRRED,
 213         COLOR_RED,
 214         COLOR_GREEN,
 215         COLOR_BRGREEN,
 216         0,
 217         0,
 218         0,
 219         0,
 220         0,
 221         0,
 222         0,
 223         0,
 224         0,
 225         COLOR_BRBLUE,
 226         COLOR_BRBLUE,
 227         COLOR_BRBLUE,
 228         COLOR_BRBLUE,
 229         COLOR_BRBLUE,
 230         COLOR_BRBLUE,
 231         COLOR_BRBLUE,
 232         COLOR_BRBLUE,
 233         COLOR_BRBLUE,
 234         COLOR_BRBLUE,
 235         COLOR_BRBLUE,
 236         COLOR_BRBLUE,
 237         COLOR_BRBLUE,
 238         COLOR_BRBLUE,
 239         COLOR_BRBLUE,
 240         COLOR_BRBLUE,
 241 };
 242
 243 AST_THREADSTORAGE(verbose_buf);
 244 #define VERBOSE_BUF_INIT_SIZE   256
 245
 246 AST_THREADSTORAGE(log_buf);
 247 #define LOG_BUF_INIT_SIZE       256
 248
 249 static void logger_queue_init(void);
 250
 251 static unsigned int make_components(const char *s, int lineno, int *verbosity)
 252 {
 253         char *w;
 254         unsigned int res = 0;
 255         char *stringp = ast_strdupa(s);
 256         unsigned int x;
 257
 258         *verbosity = 3;
 259
 260         while ((w = strsep(&stringp, ","))) {
 261                 w = ast_skip_blanks(w);
 262
 263                 if (!strcmp(w, "*")) {
 264                         res = 0xFFFFFFFF;
 265                         break;
 266                 } else if (!strncasecmp(w, "verbose(", 8) && sscanf(w + 8, "%d)", verbosity) == 1) {
 267                         res |= (1 << __LOG_VERBOSE);
 268                         break;
 269                 } else for (x = 0; x < ARRAY_LEN(levels); x++) {
 270                         if (levels[x] && !strcasecmp(w, levels[x])) {
 271                                 res |= (1 << x);
 272                                 break;
 273                         }
 274                 }
 275         }
 276
 277         return res;
 278 }
 279
 280 static struct logchannel *make_logchannel(const char *channel, const char *components, int lineno)
 281 {
 282         struct logchannel *chan;
 283         char *facility;
 284         struct ast_tm tm;
 285         struct timeval now = ast_tvnow();
 286         char datestring[256];
 287
 288         if (ast_strlen_zero(channel) || !(chan = ast_calloc(1, sizeof(*chan) + strlen(components) + 1)))
 289                 return NULL;
 290
 291         strcpy(chan->components, components);
 292         chan->lineno = lineno;
 293
 294         if (!strcasecmp(channel, "console")) {
 295                 chan->type = LOGTYPE_CONSOLE;
 296         } else if (!strncasecmp(channel, "syslog", 6)) {
 297                 /*
 298                 * syntax is:
 299                 *  syslog.facility => level,level,level
 300                 */
 301                 facility = strchr(channel, '.');
 302                 if (!facility++ || !facility) {
 303                         facility = "local0";
 304                 }
 305
 306                 chan->facility = ast_syslog_facility(facility);
 307
 308                 if (chan->facility < 0) {
 309                         fprintf(stderr, "Logger Warning: bad syslog facility in logger.conf\n");
 310                         ast_free(chan);
 311                         return NULL;
 312                 }
 313
 314                 chan->type = LOGTYPE_SYSLOG;
 315                 ast_copy_string(chan->filename, channel, sizeof(chan->filename));
 316                 openlog("asterisk", LOG_PID, chan->facility);
 317         } else {
 318                 if (!ast_strlen_zero(hostname)) {
 319                         snprintf(chan->filename, sizeof(chan->filename), "%s/%s.%s",
 320                                  channel[0] != '/' ? ast_config_AST_LOG_DIR : "", channel, hostname);
 321                 } else {
 322                         snprintf(chan->filename, sizeof(chan->filename), "%s/%s",
 323                                  channel[0] != '/' ? ast_config_AST_LOG_DIR : "", channel);
 324                 }
 325                 if (!(chan->fileptr = fopen(chan->filename, "a"))) {
 326                         /* Can't do real logging here since we're called with a lock
 327                          * so log to any attached consoles */
 328                         ast_console_puts_mutable("ERROR: Unable to open log file '", __LOG_ERROR);
 329                         ast_console_puts_mutable(chan->filename, __LOG_ERROR);
 330                         ast_console_puts_mutable("': ", __LOG_ERROR);
 331                         ast_console_puts_mutable(strerror(errno), __LOG_ERROR);
 332                         ast_console_puts_mutable("'\n", __LOG_ERROR);
 333                         ast_free(chan);
 334                         return NULL;
 335                 } else {
 336                         /* Create our date/time */
 337                         ast_localtime(&now, &tm, NULL);
 338                         ast_strftime(datestring, sizeof(datestring), dateformat, &tm);
 339
 340                         fprintf(chan->fileptr, "[%s] Asterisk %s built by %s @ %s on a %s running %s on %s\n",
 341                                 datestring, ast_get_version(), ast_build_user, ast_build_hostname,
 342                                 ast_build_machine, ast_build_os, ast_build_date);
 343                         fflush(chan->fileptr);
 344                 }
 345                 chan->type = LOGTYPE_FILE;
 346         }
 347         chan->logmask = make_components(chan->components, lineno, &chan->verbosity);
 348
 349         return chan;
 350 }
 351
 352 static void init_logger_chain(int locked, const char *altconf)
 353 {
 354         struct logchannel *chan;
 355         struct ast_config *cfg;
 356         struct ast_variable *var;
 357         const char *s;
 358         struct ast_flags config_flags = { 0 };
 359
 360         display_callids = 1;
 361
 362         if (!(cfg = ast_config_load2(S_OR(altconf, "logger.conf"), "logger", config_flags)) || cfg == CONFIG_STATUS_FILEINVALID) {
 363                 return;
 364         }
 365
 366         /* delete our list of log channels */
 367         if (!locked) {
 368                 AST_RWLIST_WRLOCK(&logchannels);
 369         }
 370         while ((chan = AST_RWLIST_REMOVE_HEAD(&logchannels, list))) {
 371                 ast_free(chan);
 372         }
 373         global_logmask = 0;
 374         if (!locked) {
 375                 AST_RWLIST_UNLOCK(&logchannels);
 376         }
 377
 378         errno = 0;
 379         /* close syslog */
 380         closelog();
 381
 382         /* If no config file, we're fine, set default options. */
 383         if (!cfg) {
 384                 if (errno) {
 385                         fprintf(stderr, "Unable to open logger.conf: %s; default settings will be used.\n", strerror(errno));
 386                 } else {
 387                         fprintf(stderr, "Errors detected in logger.conf: see above; default settings will be used.\n");
 388                 }
 389                 if (!(chan = ast_calloc(1, sizeof(*chan)))) {
 390                         return;
 391                 }
 392                 chan->type = LOGTYPE_CONSOLE;
 393                 chan->logmask = __LOG_WARNING | __LOG_NOTICE | __LOG_ERROR;
 394                 if (!locked) {
 395                         AST_RWLIST_WRLOCK(&logchannels);
 396                 }
 397                 AST_RWLIST_INSERT_HEAD(&logchannels, chan, list);
 398                 global_logmask |= chan->logmask;
 399                 if (!locked) {
 400                         AST_RWLIST_UNLOCK(&logchannels);
 401                 }
 402                 return;
 403         }
 404
 405         if ((s = ast_variable_retrieve(cfg, "general", "appendhostname"))) {
 406                 if (ast_true(s)) {
 407                         if (gethostname(hostname, sizeof(hostname) - 1)) {
 408                                 ast_copy_string(hostname, "unknown", sizeof(hostname));
 409                                 fprintf(stderr, "What box has no hostname???\n");
 410                         }
 411                 } else
 412                         hostname[0] = '\0';
 413         } else
 414                 hostname[0] = '\0';
 415         if ((s = ast_variable_retrieve(cfg, "general", "display_callids"))) {
 416                 display_callids = ast_true(s);
 417         }
 418         if ((s = ast_variable_retrieve(cfg, "general", "dateformat")))
 419                 ast_copy_string(dateformat, s, sizeof(dateformat));
 420         else
 421                 ast_copy_string(dateformat, "%b %e %T", sizeof(dateformat));
 422         if ((s = ast_variable_retrieve(cfg, "general", "queue_log"))) {
 423                 logfiles.queue_log = ast_true(s);
 424         }
 425         if ((s = ast_variable_retrieve(cfg, "general", "queue_log_to_file"))) {
 426                 logfiles.queue_log_to_file = ast_true(s);
 427         }
 428         if ((s = ast_variable_retrieve(cfg, "general", "queue_log_name"))) {
 429                 ast_copy_string(queue_log_name, s, sizeof(queue_log_name));
 430         }
 431         if ((s = ast_variable_retrieve(cfg, "general", "queue_log_realtime_use_gmt"))) {
 432                 logfiles.queue_log_realtime_use_gmt = ast_true(s);
 433         }
 434         if ((s = ast_variable_retrieve(cfg, "general", "exec_after_rotate"))) {
 435                 ast_copy_string(exec_after_rotate, s, sizeof(exec_after_rotate));
 436         }
 437         if ((s = ast_variable_retrieve(cfg, "general", "rotatestrategy"))) {
 438                 if (strcasecmp(s, "timestamp") == 0) {
 439                         rotatestrategy = TIMESTAMP;
 440                 } else if (strcasecmp(s, "rotate") == 0) {
 441                         rotatestrategy = ROTATE;
 442                 } else if (strcasecmp(s, "sequential") == 0) {
 443                         rotatestrategy = SEQUENTIAL;
 444                 } else if (strcasecmp(s, "none") == 0) {
 445                         rotatestrategy = NONE;
 446                 } else {
 447                         fprintf(stderr, "Unknown rotatestrategy: %s\n", s);
 448                 }
 449         } else {
 450                 if ((s = ast_variable_retrieve(cfg, "general", "rotatetimestamp"))) {
 451                         rotatestrategy = ast_true(s) ? TIMESTAMP : SEQUENTIAL;
 452                         fprintf(stderr, "rotatetimestamp option has been deprecated.  Please use rotatestrategy instead.\n");
 453                 }
 454         }
 455
 456         if (!locked) {
 457                 AST_RWLIST_WRLOCK(&logchannels);
 458         }
 459         var = ast_variable_browse(cfg, "logfiles");
 460         for (; var; var = var->next) {
 461                 if (!(chan = make_logchannel(var->name, var->value, var->lineno))) {
 462                         /* Print error message directly to the consoles since the lock is held
 463                          * and we don't want to unlock with the list partially built */
 464                         ast_console_puts_mutable("ERROR: Unable to create log channel '", __LOG_ERROR);
 465                         ast_console_puts_mutable(var->name, __LOG_ERROR);
 466                         ast_console_puts_mutable("'\n", __LOG_ERROR);
 467                         continue;
 468                 }
 469                 AST_RWLIST_INSERT_HEAD(&logchannels, chan, list);
 470                 global_logmask |= chan->logmask;
 471         }
 472
 473         if (qlog) {
 474                 fclose(qlog);
 475                 qlog = NULL;
 476         }
 477
 478         if (!locked) {
 479                 AST_RWLIST_UNLOCK(&logchannels);
 480         }
 481
 482         ast_config_destroy(cfg);
 483 }
 484
 485 void ast_child_verbose(int level, const char *fmt, ...)
 486 {
 487         char *msg = NULL, *emsg = NULL, *sptr, *eptr;
 488         va_list ap, aq;
 489         int size;
 490
 491         va_start(ap, fmt);
 492         va_copy(aq, ap);
 493         if ((size = vsnprintf(msg, 0, fmt, ap)) < 0) {
 494                 va_end(ap);
 495                 va_end(aq);
 496                 return;
 497         }
 498         va_end(ap);
 499
 500         if (!(msg = ast_malloc(size + 1))) {
 501                 va_end(aq);
 502                 return;
 503         }
 504
 505         vsnprintf(msg, size + 1, fmt, aq);
 506         va_end(aq);
 507
 508         if (!(emsg = ast_malloc(size * 2 + 1))) {
 509                 ast_free(msg);
 510                 return;
 511         }
 512
 513         for (sptr = msg, eptr = emsg; ; sptr++) {
 514                 if (*sptr == '"') {
 515                         *eptr++ = '\\';
 516                 }
 517                 *eptr++ = *sptr;
 518                 if (*sptr == '\0') {
 519                         break;
 520                 }
 521         }
 522         ast_free(msg);
 523
 524         fprintf(stdout, "verbose \"%s\" %d\n", emsg, level);
 525         fflush(stdout);
 526         ast_free(emsg);
 527 }
 528
 529 void ast_queue_log(const char *queuename, const char *callid, const char *agent, const char *event, const char *fmt, ...)
 530 {
 531         va_list ap;
 532         struct timeval tv;
 533         struct ast_tm tm;
 534         char qlog_msg[8192];
 535         int qlog_len;
 536         char time_str[30];
 537
 538         if (!logger_initialized) {
 539                 /* You are too early.  We are not open yet! */
 540                 return;
 541         }
 542         if (!queuelog_init) {
 543                 AST_RWLIST_WRLOCK(&logchannels);
 544                 if (!queuelog_init) {
 545                         /*
 546                          * We have delayed initializing the queue logging system so
 547                          * preloaded realtime modules can get up.  We must initialize
 548                          * now since someone is trying to log something.
 549                          */
 550                         logger_queue_init();
 551                         queuelog_init = 1;
 552                         AST_RWLIST_UNLOCK(&logchannels);
 553                         ast_queue_log("NONE", "NONE", "NONE", "QUEUESTART", "%s", "");
 554                 } else {
 555                         AST_RWLIST_UNLOCK(&logchannels);
 556                 }
 557         }
 558
 559         if (ast_check_realtime("queue_log")) {
 560                 tv = ast_tvnow();
 561                 ast_localtime(&tv, &tm, logfiles.queue_log_realtime_use_gmt ? "GMT" : NULL);
 562                 ast_strftime(time_str, sizeof(time_str), "%F %T.%6q", &tm);
 563                 va_start(ap, fmt);
 564                 vsnprintf(qlog_msg, sizeof(qlog_msg), fmt, ap);
 565                 va_end(ap);
 566                 if (logfiles.queue_adaptive_realtime) {
 567                         AST_DECLARE_APP_ARGS(args,
 568                                 AST_APP_ARG(data)[5];
 569                         );
 570                         AST_NONSTANDARD_APP_ARGS(args, qlog_msg, '|');
 571                         /* Ensure fields are large enough to receive data */
 572                         ast_realtime_require_field("queue_log",
 573                                 "data1", RQ_CHAR, strlen(S_OR(args.data[0], "")),
 574                                 "data2", RQ_CHAR, strlen(S_OR(args.data[1], "")),
 575                                 "data3", RQ_CHAR, strlen(S_OR(args.data[2], "")),
 576                                 "data4", RQ_CHAR, strlen(S_OR(args.data[3], "")),
 577                                 "data5", RQ_CHAR, strlen(S_OR(args.data[4], "")),
 578                                 SENTINEL);
 579
 580                         /* Store the log */
 581                         ast_store_realtime("queue_log", "time", time_str,
 582                                 "callid", callid,
 583                                 "queuename", queuename,
 584                                 "agent", agent,
 585                                 "event", event,
 586                                 "data1", S_OR(args.data[0], ""),
 587                                 "data2", S_OR(args.data[1], ""),
 588                                 "data3", S_OR(args.data[2], ""),
 589                                 "data4", S_OR(args.data[3], ""),
 590                                 "data5", S_OR(args.data[4], ""),
 591                                 SENTINEL);
 592                 } else {
 593                         ast_store_realtime("queue_log", "time", time_str,
 594                                 "callid", callid,
 595                                 "queuename", queuename,
 596                                 "agent", agent,
 597                                 "event", event,
 598                                 "data", qlog_msg,
 599                                 SENTINEL);
 600                 }
 601
 602                 if (!logfiles.queue_log_to_file) {
 603                         return;
 604                 }
 605         }
 606
 607         if (qlog) {
 608                 va_start(ap, fmt);
 609                 qlog_len = snprintf(qlog_msg, sizeof(qlog_msg), "%ld|%s|%s|%s|%s|", (long)time(NULL), callid, queuename, agent, event);
 610                 vsnprintf(qlog_msg + qlog_len, sizeof(qlog_msg) - qlog_len, fmt, ap);
 611                 va_end(ap);
 612                 AST_RWLIST_RDLOCK(&logchannels);
 613                 if (qlog) {
 614                         fprintf(qlog, "%s\n", qlog_msg);
 615                         fflush(qlog);
 616                 }
 617                 AST_RWLIST_UNLOCK(&logchannels);
 618         }
 619 }
 620
 621 static int rotate_file(const char *filename)
 622 {
 623         char old[PATH_MAX];
 624         char new[PATH_MAX];
 625         int x, y, which, found, res = 0, fd;
 626         char *suffixes[4] = { "", ".gz", ".bz2", ".Z" };
 627
 628         switch (rotatestrategy) {
 629         case NONE:
 630                 /* No rotation */
 631                 break;
 632         case SEQUENTIAL:
 633                 for (x = 0; ; x++) {
 634                         snprintf(new, sizeof(new), "%s.%d", filename, x);
 635                         fd = open(new, O_RDONLY);
 636                         if (fd > -1)
 637                                 close(fd);
 638                         else
 639                                 break;
 640                 }
 641                 if (rename(filename, new)) {
 642                         fprintf(stderr, "Unable to rename file '%s' to '%s'\n", filename, new);
 643                         res = -1;
 644                 } else {
 645                         filename = new;
 646                 }
 647                 break;
 648         case TIMESTAMP:
 649                 snprintf(new, sizeof(new), "%s.%ld", filename, (long)time(NULL));
 650                 if (rename(filename, new)) {
 651                         fprintf(stderr, "Unable to rename file '%s' to '%s'\n", filename, new);
 652                         res = -1;
 653                 } else {
 654                         filename = new;
 655                 }
 656                 break;
 657         case ROTATE:
 658                 /* Find the next empty slot, including a possible suffix */
 659                 for (x = 0; ; x++) {
 660                         found = 0;
 661                         for (which = 0; which < ARRAY_LEN(suffixes); which++) {
 662                                 snprintf(new, sizeof(new), "%s.%d%s", filename, x, suffixes[which]);
 663                                 fd = open(new, O_RDONLY);
 664                                 if (fd > -1) {
 665                                         close(fd);
 666                                         found = 1;
 667                                         break;
 668                                 }
 669                         }
 670                         if (!found) {
 671                                 break;
 672                         }
 673                 }
 674
 675                 /* Found an empty slot */
 676                 for (y = x; y > 0; y--) {
 677                         for (which = 0; which < ARRAY_LEN(suffixes); which++) {
 678                                 snprintf(old, sizeof(old), "%s.%d%s", filename, y - 1, suffixes[which]);
 679                                 fd = open(old, O_RDONLY);
 680                                 if (fd > -1) {
 681                                         /* Found the right suffix */
 682                                         close(fd);
 683                                         snprintf(new, sizeof(new), "%s.%d%s", filename, y, suffixes[which]);
 684                                         if (rename(old, new)) {
 685                                                 fprintf(stderr, "Unable to rename file '%s' to '%s'\n", old, new);
 686                                                 res = -1;
 687                                         }
 688                                         break;
 689                                 }
 690                         }
 691                 }
 692
 693                 /* Finally, rename the current file */
 694                 snprintf(new, sizeof(new), "%s.0", filename);
 695                 if (rename(filename, new)) {
 696                         fprintf(stderr, "Unable to rename file '%s' to '%s'\n", filename, new);
 697                         res = -1;
 698                 } else {
 699                         filename = new;
 700                 }
 701         }
 702
 703         if (!ast_strlen_zero(exec_after_rotate)) {
 704                 struct ast_channel *c = ast_dummy_channel_alloc();
 705                 char buf[512];
 706
 707                 pbx_builtin_setvar_helper(c, "filename", filename);
 708                 pbx_substitute_variables_helper(c, exec_after_rotate, buf, sizeof(buf));
 709                 if (c) {
 710                         c = ast_channel_unref(c);
 711                 }
 712                 if (ast_safe_system(buf) == -1) {
 713                         ast_log(LOG_WARNING, "error executing '%s'\n", buf);
 714                 }
 715         }
 716         return res;
 717 }
 718
 719 /*!
 720  * \internal
 721  * \brief Start the realtime queue logging if configured.
 722  *
 723  * \retval TRUE if not to open queue log file.
 724  */
 725 static int logger_queue_rt_start(void)
 726 {
 727         if (ast_check_realtime("queue_log")) {
 728                 if (!ast_realtime_require_field("queue_log",
 729                         "time", RQ_DATETIME, 26,
 730                         "data1", RQ_CHAR, 20,
 731                         "data2", RQ_CHAR, 20,
 732                         "data3", RQ_CHAR, 20,
 733                         "data4", RQ_CHAR, 20,
 734                         "data5", RQ_CHAR, 20,
 735                         SENTINEL)) {
 736                         logfiles.queue_adaptive_realtime = 1;
 737                 } else {
 738                         logfiles.queue_adaptive_realtime = 0;
 739                 }
 740
 741                 if (!logfiles.queue_log_to_file) {
 742                         /* Don't open the log file. */
 743                         return 1;
 744                 }
 745         }
 746         return 0;
 747 }
 748
 749 /*!
 750  * \internal
 751  * \brief Rotate the queue log file and restart.
 752  *
 753  * \param queue_rotate Log queue rotation mode.
 754  *
 755  * \note Assumes logchannels is write locked on entry.
 756  *
 757  * \retval 0 on success.
 758  * \retval -1 on error.
 759  */
 760 static int logger_queue_restart(int queue_rotate)
 761 {
 762         int res = 0;
 763         char qfname[PATH_MAX];
 764
 765         if (logger_queue_rt_start()) {
 766                 return res;
 767         }
 768
 769         snprintf(qfname, sizeof(qfname), "%s/%s", ast_config_AST_LOG_DIR, queue_log_name);
 770         if (qlog) {
 771                 /* Just in case it was still open. */
 772                 fclose(qlog);
 773                 qlog = NULL;
 774         }
 775         if (queue_rotate) {
 776                 rotate_file(qfname);
 777         }
 778
 779         /* Open the log file. */
 780         qlog = fopen(qfname, "a");
 781         if (!qlog) {
 782                 ast_log(LOG_ERROR, "Unable to create queue log: %s\n", strerror(errno));
 783                 res = -1;
 784         }
 785         return res;
 786 }
 787
 788 static int reload_logger(int rotate, const char *altconf)
 789 {
 790         int queue_rotate = rotate;
 791         struct logchannel *f;
 792         int res = 0;
 793
 794         AST_RWLIST_WRLOCK(&logchannels);
 795
 796         if (qlog) {
 797                 if (rotate < 0) {
 798                         /* Check filesize - this one typically doesn't need an auto-rotate */
 799                         if (ftello(qlog) > 0x40000000) { /* Arbitrarily, 1 GB */
 800                                 fclose(qlog);
 801                                 qlog = NULL;
 802                         } else {
 803                                 queue_rotate = 0;
 804                         }
 805                 } else {
 806                         fclose(qlog);
 807                         qlog = NULL;
 808                 }
 809         } else {
 810                 queue_rotate = 0;
 811         }
 812
 813         ast_mkdir(ast_config_AST_LOG_DIR, 0777);
 814
 815         AST_RWLIST_TRAVERSE(&logchannels, f, list) {
 816                 if (f->disabled) {
 817                         f->disabled = 0;        /* Re-enable logging at reload */
 818                         /*** DOCUMENTATION
 819                                 <managerEventInstance>
 820                                         <synopsis>Raised when a logging channel is re-enabled after a reload operation.</synopsis>
 821                                         <syntax>
 822                                                 <parameter name="Channel">
 823                                                         <para>The name of the logging channel.</para>
 824                                                 </parameter>
 825                                         </syntax>
 826                                 </managerEventInstance>
 827                         ***/
 828                         manager_event(EVENT_FLAG_SYSTEM, "LogChannel", "Channel: %s\r\nEnabled: Yes\r\n", f->filename);
 829                 }
 830                 if (f->fileptr && (f->fileptr != stdout) && (f->fileptr != stderr)) {
 831                         int rotate_this = 0;
 832                         if (rotatestrategy != NONE && ftello(f->fileptr) > 0x40000000) { /* Arbitrarily, 1 GB */
 833                                 /* Be more proactive about rotating massive log files */
 834                                 rotate_this = 1;
 835                         }
 836                         fclose(f->fileptr);     /* Close file */
 837                         f->fileptr = NULL;
 838                         if (rotate || rotate_this) {
 839                                 rotate_file(f->filename);
 840                         }
 841                 }
 842         }
 843
 844         filesize_reload_needed = 0;
 845
 846         init_logger_chain(1 /* locked */, altconf);
 847
 848         ast_unload_realtime("queue_log");
 849         if (logfiles.queue_log) {
 850                 res = logger_queue_restart(queue_rotate);
 851                 AST_RWLIST_UNLOCK(&logchannels);
 852                 ast_queue_log("NONE", "NONE", "NONE", "CONFIGRELOAD", "%s", "");
 853                 ast_verb(1, "Asterisk Queue Logger restarted\n");
 854         } else {
 855                 AST_RWLIST_UNLOCK(&logchannels);
 856         }
 857
 858         return res;
 859 }
 860
 861 /*! \brief Reload the logger module without rotating log files (also used from loader.c during
 862         a full Asterisk reload) */
 863 int logger_reload(void)
 864 {
 865         if (reload_logger(0, NULL)) {
 866                 return RESULT_FAILURE;
 867         }
 868         return RESULT_SUCCESS;
 869 }
 870
 871 static char *handle_logger_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 872 {
 873         switch (cmd) {
 874         case CLI_INIT:
 875                 e->command = "logger reload";
 876                 e->usage =
 877                         "Usage: logger reload [<alt-conf>]\n"
 878                         "       Reloads the logger subsystem state.  Use after restarting syslogd(8) if you are using syslog logging.\n";
 879                 return NULL;
 880         case CLI_GENERATE:
 881                 return NULL;
 882         }
 883         if (reload_logger(0, a->argc == 3 ? a->argv[2] : NULL)) {
 884                 ast_cli(a->fd, "Failed to reload the logger\n");
 885                 return CLI_FAILURE;
 886         }
 887         return CLI_SUCCESS;
 888 }
 889
 890 static char *handle_logger_rotate(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 891 {
 892         switch (cmd) {
 893         case CLI_INIT:
 894                 e->command = "logger rotate";
 895                 e->usage =
 896                         "Usage: logger rotate\n"
 897                         "       Rotates and Reopens the log files.\n";
 898                 return NULL;
 899         case CLI_GENERATE:
 900                 return NULL;
 901         }
 902         if (reload_logger(1, NULL)) {
 903                 ast_cli(a->fd, "Failed to reload the logger and rotate log files\n");
 904                 return CLI_FAILURE;
 905         }
 906         return CLI_SUCCESS;
 907 }
 908
 909 static char *handle_logger_set_level(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 910 {
 911         int x;
 912         int state;
 913         int level = -1;
 914
 915         switch (cmd) {
 916         case CLI_INIT:
 917                 e->command = "logger set level {DEBUG|NOTICE|WARNING|ERROR|VERBOSE|DTMF} {on|off}";
 918                 e->usage =
 919                         "Usage: logger set level {DEBUG|NOTICE|WARNING|ERROR|VERBOSE|DTMF} {on|off}\n"
 920                         "       Set a specific log level to enabled/disabled for this console.\n";
 921                 return NULL;
 922         case CLI_GENERATE:
 923                 return NULL;
 924         }
 925
 926         if (a->argc < 5)
 927                 return CLI_SHOWUSAGE;
 928
 929         AST_RWLIST_WRLOCK(&logchannels);
 930
 931         for (x = 0; x < ARRAY_LEN(levels); x++) {
 932                 if (levels[x] && !strcasecmp(a->argv[3], levels[x])) {
 933                         level = x;
 934                         break;
 935                 }
 936         }
 937
 938         AST_RWLIST_UNLOCK(&logchannels);
 939
 940         state = ast_true(a->argv[4]) ? 1 : 0;
 941
 942         if (level != -1) {
 943                 ast_console_toggle_loglevel(a->fd, level, state);
 944                 ast_cli(a->fd, "Logger status for '%s' has been set to '%s'.\n", levels[level], state ? "on" : "off");
 945         } else
 946                 return CLI_SHOWUSAGE;
 947
 948         return CLI_SUCCESS;
 949 }
 950
 951 /*! \brief CLI command to show logging system configuration */
 952 static char *handle_logger_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 953 {
 954 #define FORMATL "%-35.35s %-8.8s %-9.9s "
 955         struct logchannel *chan;
 956         switch (cmd) {
 957         case CLI_INIT:
 958                 e->command = "logger show channels";
 959                 e->usage =
 960                         "Usage: logger show channels\n"
 961                         "       List configured logger channels.\n";
 962                 return NULL;
 963         case CLI_GENERATE:
 964                 return NULL;
 965         }
 966         ast_cli(a->fd, FORMATL, "Channel", "Type", "Status");
 967         ast_cli(a->fd, "Configuration\n");
 968         ast_cli(a->fd, FORMATL, "-------", "----", "------");
 969         ast_cli(a->fd, "-------------\n");
 970         AST_RWLIST_RDLOCK(&logchannels);
 971         AST_RWLIST_TRAVERSE(&logchannels, chan, list) {
 972                 unsigned int level;
 973
 974                 ast_cli(a->fd, FORMATL, chan->filename, chan->type == LOGTYPE_CONSOLE ? "Console" : (chan->type == LOGTYPE_SYSLOG ? "Syslog" : "File"),
 975                         chan->disabled ? "Disabled" : "Enabled");
 976                 ast_cli(a->fd, " - ");
 977                 for (level = 0; level < ARRAY_LEN(levels); level++) {
 978                         if ((chan->logmask & (1 << level)) && levels[level]) {
 979                                 ast_cli(a->fd, "%s ", levels[level]);
 980                         }
 981                 }
 982                 ast_cli(a->fd, "\n");
 983         }
 984         AST_RWLIST_UNLOCK(&logchannels);
 985         ast_cli(a->fd, "\n");
 986
 987         return CLI_SUCCESS;
 988 }
 989
 990 struct verb {
 991         void (*verboser)(const char *string);
 992         AST_LIST_ENTRY(verb) list;
 993 };
 994
 995 static AST_RWLIST_HEAD_STATIC(verbosers, verb);
 996
 997 static struct ast_cli_entry cli_logger[] = {
 998         AST_CLI_DEFINE(handle_logger_show_channels, "List configured log channels"),
 999         AST_CLI_DEFINE(handle_logger_reload, "Reopens the log files"),
1000         AST_CLI_DEFINE(handle_logger_rotate, "Rotates and reopens the log files"),
1001         AST_CLI_DEFINE(handle_logger_set_level, "Enables/Disables a specific logging level for this console")
1002 };
1003
1004 static void _handle_SIGXFSZ(int sig)
1005 {
1006         /* Indicate need to reload */
1007         filesize_reload_needed = 1;
1008 }
1009
1010 static struct sigaction handle_SIGXFSZ = {
1011         .sa_handler = _handle_SIGXFSZ,
1012         .sa_flags = SA_RESTART,
1013 };
1014
1015 static void ast_log_vsyslog(struct logmsg *msg)
1016 {
1017         char buf[BUFSIZ];
1018         int syslog_level = ast_syslog_priority_from_loglevel(msg->level);
1019         char call_identifier_str[13];
1020
1021         if (msg->callid) {
1022                 snprintf(call_identifier_str, sizeof(call_identifier_str), "[C-%08x]", msg->callid->call_identifier);
1023         } else {
1024                 call_identifier_str[0] = '\0';
1025         }
1026
1027         if (syslog_level < 0) {
1028                 /* we are locked here, so cannot ast_log() */
1029                 fprintf(stderr, "ast_log_vsyslog called with bogus level: %d\n", msg->level);
1030                 return;
1031         }
1032
1033         snprintf(buf, sizeof(buf), "%s[%d]%s: %s:%d in %s: %s",
1034                  levels[msg->level], msg->lwp, call_identifier_str, msg->file, msg->line, msg->function, msg->message);
1035
1036         term_strip(buf, buf, strlen(buf) + 1);
1037         syslog(syslog_level, "%s", buf);
1038 }
1039
1040 /* These gymnastics are due to platforms which designate char as unsigned by
1041  * default. Level is the negative character -- offset by 1, because \0 is the
1042  * EOS delimiter. */
1043 #define VERBOSE_MAGIC2LEVEL(x) (((char) -*(signed char *) (x)) - 1)
1044 #define VERBOSE_HASMAGIC(x)     (*(signed char *) (x) < 0)
1045
1046 /*! \brief Print a normal log message to the channels */
1047 static void logger_print_normal(struct logmsg *logmsg)
1048 {
1049         struct logchannel *chan = NULL;
1050         char buf[BUFSIZ];
1051         struct verb *v = NULL;
1052         int level = 0;
1053
1054         if (logmsg->level == __LOG_VERBOSE) {
1055                 char *tmpmsg = ast_strdupa(logmsg->message + 1);
1056                 level = VERBOSE_MAGIC2LEVEL(logmsg->message);
1057                 /* Iterate through the list of verbosers and pass them the log message string */
1058                 AST_RWLIST_RDLOCK(&verbosers);
1059                 AST_RWLIST_TRAVERSE(&verbosers, v, list)
1060                         v->verboser(logmsg->message);
1061                 AST_RWLIST_UNLOCK(&verbosers);
1062                 ast_string_field_set(logmsg, message, tmpmsg);
1063         }
1064
1065         AST_RWLIST_RDLOCK(&logchannels);
1066
1067         if (!AST_RWLIST_EMPTY(&logchannels)) {
1068                 AST_RWLIST_TRAVERSE(&logchannels, chan, list) {
1069                         char call_identifier_str[13];
1070
1071                         if (logmsg->callid) {
1072                                 snprintf(call_identifier_str, sizeof(call_identifier_str), "[C-%08x]", logmsg->callid->call_identifier);
1073                         } else {
1074                                 call_identifier_str[0] = '\0';
1075                         }
1076
1077
1078                         /* If the channel is disabled, then move on to the next one */
1079                         if (chan->disabled) {
1080                                 continue;
1081                         }
1082                         if (logmsg->level == __LOG_VERBOSE && level > chan->verbosity) {
1083                                 continue;
1084                         }
1085
1086                         /* Check syslog channels */
1087                         if (chan->type == LOGTYPE_SYSLOG && (chan->logmask & (1 << logmsg->level))) {
1088                                 ast_log_vsyslog(logmsg);
1089                         /* Console channels */
1090                         } else if (chan->type == LOGTYPE_CONSOLE && (chan->logmask & (1 << logmsg->level))) {
1091                                 char linestr[128];
1092
1093                                 /* If the level is verbose, then skip it */
1094                                 if (logmsg->level == __LOG_VERBOSE)
1095                                         continue;
1096
1097                                 /* Turn the numerical line number into a string */
1098                                 snprintf(linestr, sizeof(linestr), "%d", logmsg->line);
1099                                 /* Build string to print out */
1100                                 snprintf(buf, sizeof(buf), "[%s] " COLORIZE_FMT "[%d]%s: " COLORIZE_FMT ":" COLORIZE_FMT " " COLORIZE_FMT ": %s",
1101                                          logmsg->date,
1102                                          COLORIZE(colors[logmsg->level], 0, logmsg->level_name),
1103                                          logmsg->lwp,
1104                                          call_identifier_str,
1105                                          COLORIZE(COLOR_BRWHITE, 0, logmsg->file),
1106                                          COLORIZE(COLOR_BRWHITE, 0, linestr),
1107                                          COLORIZE(COLOR_BRWHITE, 0, logmsg->function),
1108                                          logmsg->message);
1109                                 /* Print out */
1110                                 ast_console_puts_mutable(buf, logmsg->level);
1111                         /* File channels */
1112                         } else if (chan->type == LOGTYPE_FILE && (chan->logmask & (1 << logmsg->level))) {
1113                                 int res = 0;
1114
1115                                 /* If no file pointer exists, skip it */
1116                                 if (!chan->fileptr) {
1117                                         continue;
1118                                 }
1119
1120                                 /* Print out to the file */
1121                                 res = fprintf(chan->fileptr, "[%s] %s[%d]%s %s: %s",
1122                                               logmsg->date, logmsg->level_name, logmsg->lwp, call_identifier_str,
1123                                               logmsg->file, term_strip(buf, logmsg->message, BUFSIZ));
1124                                 if (res <= 0 && !ast_strlen_zero(logmsg->message)) {
1125                                         fprintf(stderr, "**** Asterisk Logging Error: ***********\n");
1126                                         if (errno == ENOMEM || errno == ENOSPC)
1127                                                 fprintf(stderr, "Asterisk logging error: Out of disk space, can't log to log file %s\n", chan->filename);
1128                                         else
1129                                                 fprintf(stderr, "Logger Warning: Unable to write to log file '%s': %s (disabled)\n", chan->filename, strerror(errno));
1130                                         /*** DOCUMENTATION
1131                                                 <managerEventInstance>
1132                                                         <synopsis>Raised when a logging channel is disabled.</synopsis>
1133                                                         <syntax>
1134                                                                 <parameter name="Channel">
1135                                                                         <para>The name of the logging channel.</para>
1136                                                                 </parameter>
1137                                                         </syntax>
1138                                                 </managerEventInstance>
1139                                         ***/
1140                                         manager_event(EVENT_FLAG_SYSTEM, "LogChannel", "Channel: %s\r\nEnabled: No\r\nReason: %d - %s\r\n", chan->filename, errno, strerror(errno));
1141                                         chan->disabled = 1;
1142                                 } else if (res > 0) {
1143                                         fflush(chan->fileptr);
1144                                 }
1145                         }
1146                 }
1147         } else if (logmsg->level != __LOG_VERBOSE) {
1148                 fputs(logmsg->message, stdout);
1149         }
1150
1151         AST_RWLIST_UNLOCK(&logchannels);
1152
1153         /* If we need to reload because of the file size, then do so */
1154         if (filesize_reload_needed) {
1155                 reload_logger(-1, NULL);
1156                 ast_verb(1, "Rotated Logs Per SIGXFSZ (Exceeded file size limit)\n");
1157         }
1158
1159         return;
1160 }
1161
1162 /*! \brief Actual logging thread */
1163 static void *logger_thread(void *data)
1164 {
1165         struct logmsg *next = NULL, *msg = NULL;
1166
1167         for (;;) {
1168                 /* We lock the message list, and see if any message exists... if not we wait on the condition to be signalled */
1169                 AST_LIST_LOCK(&logmsgs);
1170                 if (AST_LIST_EMPTY(&logmsgs)) {
1171                         if (close_logger_thread) {
1172                                 AST_LIST_UNLOCK(&logmsgs);
1173                                 break;
1174                         } else {
1175                                 ast_cond_wait(&logcond, &logmsgs.lock);
1176                         }
1177                 }
1178                 next = AST_LIST_FIRST(&logmsgs);
1179                 AST_LIST_HEAD_INIT_NOLOCK(&logmsgs);
1180                 AST_LIST_UNLOCK(&logmsgs);
1181
1182                 /* Otherwise go through and process each message in the order added */
1183                 while ((msg = next)) {
1184                         /* Get the next entry now so that we can free our current structure later */
1185                         next = AST_LIST_NEXT(msg, list);
1186
1187                         /* Depending on the type, send it to the proper function */
1188                         logger_print_normal(msg);
1189
1190                         /* Free the data since we are done */
1191                         logmsg_free(msg);
1192                 }
1193
1194                 /* If we should stop, then stop */
1195                 if (close_logger_thread)
1196                         break;
1197         }
1198
1199         return NULL;
1200 }
1201
1202 /*!
1203  * \internal
1204  * \brief Initialize the logger queue.
1205  *
1206  * \note Assumes logchannels is write locked on entry.
1207  *
1208  * \return Nothing
1209  */
1210 static void logger_queue_init(void)
1211 {
1212         ast_unload_realtime("queue_log");
1213         if (logfiles.queue_log) {
1214                 char qfname[PATH_MAX];
1215
1216                 if (logger_queue_rt_start()) {
1217                         return;
1218                 }
1219
1220                 /* Open the log file. */
1221                 snprintf(qfname, sizeof(qfname), "%s/%s", ast_config_AST_LOG_DIR,
1222                         queue_log_name);
1223                 if (qlog) {
1224                         /* Just in case it was already open. */
1225                         fclose(qlog);
1226                 }
1227                 qlog = fopen(qfname, "a");
1228                 if (!qlog) {
1229                         ast_log(LOG_ERROR, "Unable to create queue log: %s\n", strerror(errno));
1230                 }
1231         }
1232 }
1233
1234 int init_logger(void)
1235 {
1236         /* auto rotate if sig SIGXFSZ comes a-knockin */
1237         sigaction(SIGXFSZ, &handle_SIGXFSZ, NULL);
1238
1239         /* Re-initialize the logmsgs mutex.  The recursive mutex can be accessed prior
1240          * to Asterisk being forked into the background, which can cause the thread
1241          * ID tracked by the underlying pthread mutex to be different than the ID of
1242          * the thread that unlocks the mutex.  Since init_logger is called after the
1243          * fork, it is safe to initialize the mutex here for future accesses.
1244          */
1245         ast_mutex_destroy(&logmsgs.lock);
1246         ast_mutex_init(&logmsgs.lock);
1247         ast_cond_init(&logcond, NULL);
1248
1249         /* start logger thread */
1250         if (ast_pthread_create(&logthread, NULL, logger_thread, NULL) < 0) {
1251                 ast_cond_destroy(&logcond);
1252                 return -1;
1253         }
1254
1255         /* register the logger cli commands */
1256         ast_cli_register_multiple(cli_logger, ARRAY_LEN(cli_logger));
1257
1258         ast_mkdir(ast_config_AST_LOG_DIR, 0777);
1259
1260         /* create log channels */
1261         init_logger_chain(0 /* locked */, NULL);
1262         logger_initialized = 1;
1263
1264         return 0;
1265 }
1266
1267 void close_logger(void)
1268 {
1269         struct logchannel *f = NULL;
1270         struct verb *cur = NULL;
1271
1272         ast_cli_unregister_multiple(cli_logger, ARRAY_LEN(cli_logger));
1273
1274         logger_initialized = 0;
1275
1276         /* Stop logger thread */
1277         AST_LIST_LOCK(&logmsgs);
1278         close_logger_thread = 1;
1279         ast_cond_signal(&logcond);
1280         AST_LIST_UNLOCK(&logmsgs);
1281
1282         if (logthread != AST_PTHREADT_NULL)
1283                 pthread_join(logthread, NULL);
1284
1285         AST_RWLIST_WRLOCK(&verbosers);
1286         while ((cur = AST_LIST_REMOVE_HEAD(&verbosers, list))) {
1287                 ast_free(cur);
1288         }
1289         AST_RWLIST_UNLOCK(&verbosers);
1290
1291         AST_RWLIST_WRLOCK(&logchannels);
1292
1293         if (qlog) {
1294                 fclose(qlog);
1295                 qlog = NULL;
1296         }
1297
1298         while ((f = AST_LIST_REMOVE_HEAD(&logchannels, list))) {
1299                 if (f->fileptr && (f->fileptr != stdout) && (f->fileptr != stderr)) {
1300                         fclose(f->fileptr);
1301                         f->fileptr = NULL;
1302                 }
1303                 ast_free(f);
1304         }
1305
1306         closelog(); /* syslog */
1307
1308         AST_RWLIST_UNLOCK(&logchannels);
1309 }
1310
1311 void ast_callid_strnprint(char *buffer, size_t buffer_size, struct ast_callid *callid)
1312 {
1313         snprintf(buffer, buffer_size, "[C-%08x]", callid->call_identifier);
1314 }
1315
1316 struct ast_callid *ast_create_callid(void)
1317 {
1318         struct ast_callid *call;
1319
1320         call = ao2_alloc_options(sizeof(struct ast_callid), NULL, AO2_ALLOC_OPT_LOCK_NOLOCK);
1321         if (!call) {
1322                 ast_log(LOG_ERROR, "Could not allocate callid struct.\n");
1323                 return NULL;
1324         }
1325
1326         call->call_identifier = ast_atomic_fetchadd_int(&next_unique_callid, +1);
1327 #ifdef TEST_FRAMEWORK
1328         ast_debug(3, "CALL_ID [C-%08x] created by thread.\n", call->call_identifier);
1329 #endif
1330         return call;
1331 }
1332
1333 struct ast_callid *ast_read_threadstorage_callid(void)
1334 {
1335         struct ast_callid **callid;
1336         callid = ast_threadstorage_get(&unique_callid, sizeof(struct ast_callid **));
1337         if (callid && *callid) {
1338                 ast_callid_ref(*callid);
1339                 return *callid;
1340         }
1341
1342         return NULL;
1343
1344 }
1345
1346 int ast_callid_threadassoc_change(struct ast_callid *callid)
1347 {
1348         struct ast_callid **id =
1349                 ast_threadstorage_get(&unique_callid, sizeof(struct ast_callid **));
1350
1351         if (!id) {
1352                 ast_log(LOG_ERROR, "Failed to allocate thread storage.\n");
1353                 return -1;
1354         }
1355
1356         if (*id && (*id != callid)) {
1357 #ifdef TEST_FRAMEWORK
1358                 ast_debug(3, "CALL_ID [C-%08x] being removed from thread.\n", (*id)->call_identifier);
1359 #endif
1360                 *id = ast_callid_unref(*id);
1361                 *id = NULL;
1362         }
1363
1364         if (!(*id) && callid) {
1365                 /* callid will be unreffed at thread destruction */
1366                 ast_callid_ref(callid);
1367                 *id = callid;
1368 #ifdef TEST_FRAMEWORK
1369                 ast_debug(3, "CALL_ID [C-%08x] bound to thread.\n", callid->call_identifier);
1370 #endif
1371         }
1372
1373         return 0;
1374 }
1375
1376 int ast_callid_threadassoc_add(struct ast_callid *callid)
1377 {
1378         struct ast_callid **pointing;
1379         pointing = ast_threadstorage_get(&unique_callid, sizeof(struct ast_callid **));
1380         if (!(pointing)) {
1381                 ast_log(LOG_ERROR, "Failed to allocate thread storage.\n");
1382                 return -1;
1383         }
1384
1385         if (!(*pointing)) {
1386                 /* callid will be unreffed at thread destruction */
1387                 ast_callid_ref(callid);
1388                 *pointing = callid;
1389 #ifdef TEST_FRAMEWORK
1390                 ast_debug(3, "CALL_ID [C-%08x] bound to thread.\n", callid->call_identifier);
1391 #endif
1392         } else {
1393                 ast_log(LOG_WARNING, "Attempted to ast_callid_threadassoc_add on thread already associated with a callid.\n");
1394                 return 1;
1395         }
1396
1397         return 0;
1398 }
1399
1400 int ast_callid_threadassoc_remove(void)
1401 {
1402         struct ast_callid **pointing;
1403         pointing = ast_threadstorage_get(&unique_callid, sizeof(struct ast_callid **));
1404         if (!(pointing)) {
1405                 ast_log(LOG_ERROR, "Failed to allocate thread storage.\n");
1406                 return -1;
1407         }
1408
1409         if (!(*pointing)) {
1410                 ast_log(LOG_ERROR, "Tried to clean callid thread storage with no callid in thread storage.\n");
1411                 return -1;
1412         } else {
1413 #ifdef TEST_FRAMEWORK
1414                 ast_debug(3, "CALL_ID [C-%08x] being removed from thread.\n", (*pointing)->call_identifier);
1415 #endif
1416                 *pointing = ast_callid_unref(*pointing);
1417                 return 0;
1418         }
1419 }
1420
1421 int ast_callid_threadstorage_auto(struct ast_callid **callid)
1422 {
1423         struct ast_callid *tmp;
1424
1425         /* Start by trying to see if a callid is available from thread storage */
1426         tmp = ast_read_threadstorage_callid();
1427         if (tmp) {
1428                 *callid = tmp;
1429                 return 0;
1430         }
1431
1432         /* If that failed, try to create a new one and bind it. */
1433         tmp = ast_create_callid();
1434         if (tmp) {
1435                 ast_callid_threadassoc_add(tmp);
1436                 *callid = tmp;
1437                 return 1;
1438         }
1439
1440         /* If neither worked, then something must have gone wrong. */
1441         return -1;
1442 }
1443
1444 void ast_callid_threadstorage_auto_clean(struct ast_callid *callid, int callid_created)
1445 {
1446         if (callid) {
1447                 /* If the callid was created rather than simply grabbed from the thread storage, we need to unbind here. */
1448                 if (callid_created == 1) {
1449                         ast_callid_threadassoc_remove();
1450                 }
1451                 callid = ast_callid_unref(callid);
1452         }
1453 }
1454
1455 /*!
1456  * \internal
1457  * \brief thread storage cleanup function for unique_callid
1458  */
1459 static void unique_callid_cleanup(void *data)
1460 {
1461         struct ast_callid **callid = data;
1462
1463         if (*callid) {
1464                 ast_callid_unref(*callid);
1465         }
1466
1467         ast_free(data);
1468 }
1469
1470 /*!
1471  * \brief send log messages to syslog and/or the console
1472  */
1473 static void __attribute__((format(printf, 6, 0))) ast_log_full(int level, const char *file, int line, const char *function, struct ast_callid *callid, const char *fmt, va_list ap)
1474 {
1475         struct logmsg *logmsg = NULL;
1476         struct ast_str *buf = NULL;
1477         struct ast_tm tm;
1478         struct timeval now = ast_tvnow();
1479         int res = 0;
1480         char datestring[256];
1481
1482         if (!(buf = ast_str_thread_get(&log_buf, LOG_BUF_INIT_SIZE)))
1483                 return;
1484
1485         if (level != __LOG_VERBOSE && AST_RWLIST_EMPTY(&logchannels)) {
1486                 /*
1487                  * we don't have the logger chain configured yet,
1488                  * so just log to stdout
1489                  */
1490                 int result;
1491                 result = ast_str_set_va(&buf, BUFSIZ, fmt, ap); /* XXX BUFSIZ ? */
1492                 if (result != AST_DYNSTR_BUILD_FAILED) {
1493                         term_filter_escapes(ast_str_buffer(buf));
1494                         fputs(ast_str_buffer(buf), stdout);
1495                 }
1496                 return;
1497         }
1498
1499         /* Ignore anything that never gets logged anywhere */
1500         if (level != __LOG_VERBOSE && !(global_logmask & (1 << level)))
1501                 return;
1502
1503         /* Build string */
1504         res = ast_str_set_va(&buf, BUFSIZ, fmt, ap);
1505
1506         /* If the build failed, then abort and free this structure */
1507         if (res == AST_DYNSTR_BUILD_FAILED)
1508                 return;
1509
1510         /* Create a new logging message */
1511         if (!(logmsg = ast_calloc_with_stringfields(1, struct logmsg, res + 128)))
1512                 return;
1513
1514         /* Copy string over */
1515         ast_string_field_set(logmsg, message, ast_str_buffer(buf));
1516
1517         /* Set type */
1518         if (level == __LOG_VERBOSE) {
1519                 logmsg->type = LOGMSG_VERBOSE;
1520         } else {
1521                 logmsg->type = LOGMSG_NORMAL;
1522         }
1523
1524         if (display_callids && callid) {
1525                 logmsg->callid = ast_callid_ref(callid);
1526                 /* callid will be unreffed at logmsg destruction */
1527         }
1528
1529         /* Create our date/time */
1530         ast_localtime(&now, &tm, NULL);
1531         ast_strftime(datestring, sizeof(datestring), dateformat, &tm);
1532         ast_string_field_set(logmsg, date, datestring);
1533
1534         /* Copy over data */
1535         logmsg->level = level;
1536         logmsg->line = line;
1537         ast_string_field_set(logmsg, level_name, levels[level]);
1538         ast_string_field_set(logmsg, file, file);
1539         ast_string_field_set(logmsg, function, function);
1540         logmsg->lwp = ast_get_tid();
1541
1542         /* If the logger thread is active, append it to the tail end of the list - otherwise skip that step */
1543         if (logthread != AST_PTHREADT_NULL) {
1544                 AST_LIST_LOCK(&logmsgs);
1545                 if (close_logger_thread) {
1546                         /* Logger is either closing or closed.  We cannot log this message. */
1547                         logmsg_free(logmsg);
1548                 } else {
1549                         AST_LIST_INSERT_TAIL(&logmsgs, logmsg, list);
1550                         ast_cond_signal(&logcond);
1551                 }
1552                 AST_LIST_UNLOCK(&logmsgs);
1553         } else {
1554                 logger_print_normal(logmsg);
1555                 logmsg_free(logmsg);
1556         }
1557 }
1558
1559 void ast_log(int level, const char *file, int line, const char *function, const char *fmt, ...)
1560 {
1561         struct ast_callid *callid;
1562         va_list ap;
1563
1564         callid = ast_read_threadstorage_callid();
1565
1566         va_start(ap, fmt);
1567         ast_log_full(level, file, line, function, callid, fmt, ap);
1568         va_end(ap);
1569
1570         if (callid) {
1571                 ast_callid_unref(callid);
1572         }
1573 }
1574
1575 void ast_log_callid(int level, const char *file, int line, const char *function, struct ast_callid *callid, const char *fmt, ...)
1576 {
1577         va_list ap;
1578         va_start(ap, fmt);
1579         ast_log_full(level, file, line, function, callid, fmt, ap);
1580         va_end(ap);
1581 }
1582
1583 #ifdef HAVE_BKTR
1584
1585 struct ast_bt *ast_bt_create(void)
1586 {
1587         struct ast_bt *bt = ast_calloc(1, sizeof(*bt));
1588         if (!bt) {
1589                 ast_log(LOG_ERROR, "Unable to allocate memory for backtrace structure!\n");
1590                 return NULL;
1591         }
1592
1593         bt->alloced = 1;
1594
1595         ast_bt_get_addresses(bt);
1596
1597         return bt;
1598 }
1599
1600 int ast_bt_get_addresses(struct ast_bt *bt)
1601 {
1602         bt->num_frames = backtrace(bt->addresses, AST_MAX_BT_FRAMES);
1603
1604         return 0;
1605 }
1606
1607 void *ast_bt_destroy(struct ast_bt *bt)
1608 {
1609         if (bt->alloced) {
1610                 ast_free(bt);
1611         }
1612
1613         return NULL;
1614 }
1615
1616 char **ast_bt_get_symbols(void **addresses, size_t num_frames)
1617 {
1618         char **strings = NULL;
1619 #if defined(BETTER_BACKTRACES)
1620         int stackfr;
1621         bfd *bfdobj;           /* bfd.h */
1622         Dl_info dli;           /* dlfcn.h */
1623         long allocsize;
1624         asymbol **syms = NULL; /* bfd.h */
1625         bfd_vma offset;        /* bfd.h */
1626         const char *lastslash;
1627         asection *section;
1628         const char *file, *func;
1629         unsigned int line;
1630         char address_str[128];
1631         char msg[1024];
1632         size_t strings_size;
1633         size_t *eachlen;
1634 #endif
1635
1636 #if defined(BETTER_BACKTRACES)
1637         strings_size = num_frames * sizeof(*strings);
1638         eachlen = ast_calloc(num_frames, sizeof(*eachlen));
1639
1640         if (!(strings = ast_calloc(num_frames, sizeof(*strings)))) {
1641                 return NULL;
1642         }
1643
1644         for (stackfr = 0; stackfr < num_frames; stackfr++) {
1645                 int found = 0, symbolcount;
1646
1647                 msg[0] = '\0';
1648
1649                 if (!dladdr(addresses[stackfr], &dli)) {
1650                         continue;
1651                 }
1652
1653                 if (strcmp(dli.dli_fname, "asterisk") == 0) {
1654                         char asteriskpath[256];
1655                         if (!(dli.dli_fname = ast_utils_which("asterisk", asteriskpath, sizeof(asteriskpath)))) {
1656                                 /* This will fail to find symbols */
1657                                 ast_debug(1, "Failed to find asterisk binary for debug symbols.\n");
1658                                 dli.dli_fname = "asterisk";
1659                         }
1660                 }
1661
1662                 lastslash = strrchr(dli.dli_fname, '/');
1663                 if (    (bfdobj = bfd_openr(dli.dli_fname, NULL)) &&
1664                                 bfd_check_format(bfdobj, bfd_object) &&
1665                                 (allocsize = bfd_get_symtab_upper_bound(bfdobj)) > 0 &&
1666                                 (syms = ast_malloc(allocsize)) &&
1667                                 (symbolcount = bfd_canonicalize_symtab(bfdobj, syms))) {
1668
1669                         if (bfdobj->flags & DYNAMIC) {
1670                                 offset = addresses[stackfr] - dli.dli_fbase;
1671                         } else {
1672                                 offset = addresses[stackfr] - (void *) 0;
1673                         }
1674
1675                         for (section = bfdobj->sections; section; section = section->next) {
1676                                 if (    !bfd_get_section_flags(bfdobj, section) & SEC_ALLOC ||
1677                                                 section->vma > offset ||
1678                                                 section->size + section->vma < offset) {
1679                                         continue;
1680                                 }
1681
1682                                 if (!bfd_find_nearest_line(bfdobj, section, syms, offset - section->vma, &file, &func, &line)) {
1683                                         continue;
1684                                 }
1685
1686                                 /* file can possibly be null even with a success result from bfd_find_nearest_line */
1687                                 file = file ? file : "";
1688
1689                                 /* Stack trace output */
1690                                 found++;
1691                                 if ((lastslash = strrchr(file, '/'))) {
1692                                         const char *prevslash;
1693                                         for (prevslash = lastslash - 1; *prevslash != '/' && prevslash >= file; prevslash--);
1694                                         if (prevslash >= file) {
1695                                                 lastslash = prevslash;
1696                                         }
1697                                 }
1698                                 if (dli.dli_saddr == NULL) {
1699                                         address_str[0] = '\0';
1700                                 } else {
1701                                         snprintf(address_str, sizeof(address_str), " (%p+%lX)",
1702                                                 dli.dli_saddr,
1703                                                 (unsigned long) (addresses[stackfr] - dli.dli_saddr));
1704                                 }
1705                                 snprintf(msg, sizeof(msg), "%s:%u %s()%s",
1706                                         lastslash ? lastslash + 1 : file, line,
1707                                         S_OR(func, "???"),
1708                                         address_str);
1709
1710                                 break; /* out of section iteration */
1711                         }
1712                 }
1713                 if (bfdobj) {
1714                         bfd_close(bfdobj);
1715                         if (syms) {
1716                                 ast_free(syms);
1717                         }
1718                 }
1719
1720                 /* Default output, if we cannot find the information within BFD */
1721                 if (!found) {
1722                         if (dli.dli_saddr == NULL) {
1723                                 address_str[0] = '\0';
1724                         } else {
1725                                 snprintf(address_str, sizeof(address_str), " (%p+%lX)",
1726                                         dli.dli_saddr,
1727                                         (unsigned long) (addresses[stackfr] - dli.dli_saddr));
1728                         }
1729                         snprintf(msg, sizeof(msg), "%s %s()%s",
1730                                 lastslash ? lastslash + 1 : dli.dli_fname,
1731                                 S_OR(dli.dli_sname, "<unknown>"),
1732                                 address_str);
1733                 }
1734
1735                 if (!ast_strlen_zero(msg)) {
1736                         char **tmp;
1737                         eachlen[stackfr] = strlen(msg);
1738                         if (!(tmp = ast_realloc(strings, strings_size + eachlen[stackfr] + 1))) {
1739                                 ast_free(strings);
1740                                 strings = NULL;
1741                                 break; /* out of stack frame iteration */
1742                         }
1743                         strings = tmp;
1744                         strings[stackfr] = (char *) strings + strings_size;
1745                         ast_copy_string(strings[stackfr], msg, eachlen[stackfr] + 1);
1746                         strings_size += eachlen[stackfr] + 1;
1747                 }
1748         }
1749
1750         if (strings) {
1751                 /* Recalculate the offset pointers */
1752                 strings[0] = (char *) strings + num_frames * sizeof(*strings);
1753                 for (stackfr = 1; stackfr < num_frames; stackfr++) {
1754                         strings[stackfr] = strings[stackfr - 1] + eachlen[stackfr - 1] + 1;
1755                 }
1756         }
1757 #else /* !defined(BETTER_BACKTRACES) */
1758         strings = backtrace_symbols(addresses, num_frames);
1759 #endif /* defined(BETTER_BACKTRACES) */
1760         return strings;
1761 }
1762
1763 #endif /* HAVE_BKTR */
1764
1765 void ast_backtrace(void)
1766 {
1767 #ifdef HAVE_BKTR
1768         struct ast_bt *bt;
1769         int i = 0;
1770         char **strings;
1771
1772         if (!(bt = ast_bt_create())) {
1773                 ast_log(LOG_WARNING, "Unable to allocate space for backtrace structure\n");
1774                 return;
1775         }
1776
1777         if ((strings = ast_bt_get_symbols(bt->addresses, bt->num_frames))) {
1778                 ast_debug(1, "Got %d backtrace record%c\n", bt->num_frames, bt->num_frames != 1 ? 's' : ' ');
1779                 for (i = 3; i < bt->num_frames - 2; i++) {
1780                         ast_debug(1, "#%d: [%p] %s\n", i - 3, bt->addresses[i], strings[i]);
1781                 }
1782
1783                 /* MALLOC_DEBUG will erroneously report an error here, unless we undef the macro. */
1784 #undef free
1785                 free(strings);
1786         } else {
1787                 ast_debug(1, "Could not allocate memory for backtrace\n");
1788         }
1789         ast_bt_destroy(bt);
1790 #else
1791         ast_log(LOG_WARNING, "Must run configure with '--with-execinfo' for stack backtraces.\n");
1792 #endif /* defined(HAVE_BKTR) */
1793 }
1794
1795 void __ast_verbose_ap(const char *file, int line, const char *func, int level, struct ast_callid *callid, const char *fmt, va_list ap)
1796 {
1797         struct ast_str *buf = NULL;
1798         int res = 0;
1799         const char *prefix = level >= 4 ? VERBOSE_PREFIX_4 : level == 3 ? VERBOSE_PREFIX_3 : level == 2 ? VERBOSE_PREFIX_2 : level == 1 ? VERBOSE_PREFIX_1 : "";
1800         signed char magic = level > 127 ? -128 : -level - 1; /* 0 => -1, 1 => -2, etc.  Can't pass NUL, as it is EOS-delimiter */
1801
1802         /* For compatibility with modules still calling ast_verbose() directly instead of using ast_verb() */
1803         if (level < 0) {
1804                 if (!strncmp(fmt, VERBOSE_PREFIX_4, strlen(VERBOSE_PREFIX_4))) {
1805                         magic = -5;
1806                 } else if (!strncmp(fmt, VERBOSE_PREFIX_3, strlen(VERBOSE_PREFIX_3))) {
1807                         magic = -4;
1808                 } else if (!strncmp(fmt, VERBOSE_PREFIX_2, strlen(VERBOSE_PREFIX_2))) {
1809                         magic = -3;
1810                 } else if (!strncmp(fmt, VERBOSE_PREFIX_1, strlen(VERBOSE_PREFIX_1))) {
1811                         magic = -2;
1812                 } else {
1813                         magic = -1;
1814                 }
1815         }
1816
1817         if (!(buf = ast_str_thread_get(&verbose_buf, VERBOSE_BUF_INIT_SIZE))) {
1818                 return;
1819         }
1820
1821         if (ast_opt_timestamp) {
1822                 struct timeval now;
1823                 struct ast_tm tm;
1824                 char date[40];
1825                 char *datefmt;
1826
1827                 now = ast_tvnow();
1828                 ast_localtime(&now, &tm, NULL);
1829                 ast_strftime(date, sizeof(date), dateformat, &tm);
1830                 datefmt = ast_alloca(strlen(date) + 3 + strlen(prefix) + strlen(fmt) + 1);
1831                 sprintf(datefmt, "%c[%s] %s%s", (char) magic, date, prefix, fmt);
1832                 fmt = datefmt;
1833         } else {
1834                 char *tmp = ast_alloca(strlen(prefix) + strlen(fmt) + 2);
1835                 sprintf(tmp, "%c%s%s", (char) magic, prefix, fmt);
1836                 fmt = tmp;
1837         }
1838
1839         /* Build string */
1840         res = ast_str_set_va(&buf, 0, fmt, ap);
1841
1842         /* If the build failed then we can drop this allocated message */
1843         if (res == AST_DYNSTR_BUILD_FAILED) {
1844                 return;
1845         }
1846
1847         ast_log_callid(__LOG_VERBOSE, file, line, func, callid, "%s", ast_str_buffer(buf));
1848 }
1849
1850 void __ast_verbose(const char *file, int line, const char *func, int level, const char *fmt, ...)
1851 {
1852         struct ast_callid *callid;
1853         va_list ap;
1854
1855         callid = ast_read_threadstorage_callid();
1856
1857         va_start(ap, fmt);
1858         __ast_verbose_ap(file, line, func, level, callid, fmt, ap);
1859         va_end(ap);
1860
1861         if (callid) {
1862                 ast_callid_unref(callid);
1863         }
1864 }
1865
1866 void __ast_verbose_callid(const char *file, int line, const char *func, int level, struct ast_callid *callid, const char *fmt, ...)
1867 {
1868         va_list ap;
1869         va_start(ap, fmt);
1870         __ast_verbose_ap(file, line, func, level, callid, fmt, ap);
1871         va_end(ap);
1872 }
1873
1874 /* No new code should use this directly, but we have the ABI for backwards compat */
1875 #undef ast_verbose
1876 void __attribute__((format(printf, 1,2))) ast_verbose(const char *fmt, ...);
1877 void ast_verbose(const char *fmt, ...)
1878 {
1879         struct ast_callid *callid;
1880         va_list ap;
1881
1882         callid = ast_read_threadstorage_callid();
1883
1884         va_start(ap, fmt);
1885         __ast_verbose_ap("", 0, "", 0, callid, fmt, ap);
1886         va_end(ap);
1887
1888         if (callid) {
1889                 ast_callid_unref(callid);
1890         }
1891 }
1892
1893 int ast_register_verbose(void (*v)(const char *string))
1894 {
1895         struct verb *verb;
1896
1897         if (!(verb = ast_malloc(sizeof(*verb))))
1898                 return -1;
1899
1900         verb->verboser = v;
1901
1902         AST_RWLIST_WRLOCK(&verbosers);
1903         AST_RWLIST_INSERT_HEAD(&verbosers, verb, list);
1904         AST_RWLIST_UNLOCK(&verbosers);
1905
1906         return 0;
1907 }
1908
1909 int ast_unregister_verbose(void (*v)(const char *string))
1910 {
1911         struct verb *cur;
1912
1913         AST_RWLIST_WRLOCK(&verbosers);
1914         AST_RWLIST_TRAVERSE_SAFE_BEGIN(&verbosers, cur, list) {
1915                 if (cur->verboser == v) {
1916                         AST_RWLIST_REMOVE_CURRENT(list);
1917                         ast_free(cur);
1918                         break;
1919                 }
1920         }
1921         AST_RWLIST_TRAVERSE_SAFE_END;
1922         AST_RWLIST_UNLOCK(&verbosers);
1923
1924         return cur ? 0 : -1;
1925 }
1926
1927 static void update_logchannels(void)
1928 {
1929         struct logchannel *cur;
1930
1931         AST_RWLIST_WRLOCK(&logchannels);
1932
1933         global_logmask = 0;
1934
1935         AST_RWLIST_TRAVERSE(&logchannels, cur, list) {
1936                 cur->logmask = make_components(cur->components, cur->lineno, &cur->verbosity);
1937                 global_logmask |= cur->logmask;
1938         }
1939
1940         AST_RWLIST_UNLOCK(&logchannels);
1941 }
1942
1943 int ast_logger_register_level(const char *name)
1944 {
1945         unsigned int level;
1946         unsigned int available = 0;
1947
1948         AST_RWLIST_WRLOCK(&logchannels);
1949
1950         for (level = 0; level < ARRAY_LEN(levels); level++) {
1951                 if ((level >= 16) && !available && !levels[level]) {
1952                         available = level;
1953                         continue;
1954                 }
1955
1956                 if (levels[level] && !strcasecmp(levels[level], name)) {
1957                         ast_log(LOG_WARNING,
1958                                 "Unable to register dynamic logger level '%s': a standard logger level uses that name.\n",
1959                                 name);
1960                         AST_RWLIST_UNLOCK(&logchannels);
1961
1962                         return -1;
1963                 }
1964         }
1965
1966         if (!available) {
1967                 ast_log(LOG_WARNING,
1968                         "Unable to register dynamic logger level '%s'; maximum number of levels registered.\n",
1969                         name);
1970                 AST_RWLIST_UNLOCK(&logchannels);
1971
1972                 return -1;
1973         }
1974
1975         levels[available] = ast_strdup(name);
1976
1977         AST_RWLIST_UNLOCK(&logchannels);
1978
1979         ast_debug(1, "Registered dynamic logger level '%s' with index %d.\n", name, available);
1980
1981         update_logchannels();
1982
1983         return available;
1984 }
1985
1986 void ast_logger_unregister_level(const char *name)
1987 {
1988         unsigned int found = 0;
1989         unsigned int x;
1990
1991         AST_RWLIST_WRLOCK(&logchannels);
1992
1993         for (x = 16; x < ARRAY_LEN(levels); x++) {
1994                 if (!levels[x]) {
1995                         continue;
1996                 }
1997
1998                 if (strcasecmp(levels[x], name)) {
1999                         continue;
2000                 }
2001
2002                 found = 1;
2003                 break;
2004         }
2005
2006         if (found) {
2007                 /* take this level out of the global_logmask, to ensure that no new log messages
2008                  * will be queued for it
2009                  */
2010
2011                 global_logmask &= ~(1 << x);
2012
2013                 ast_free(levels[x]);
2014                 levels[x] = NULL;
2015                 AST_RWLIST_UNLOCK(&logchannels);
2016
2017                 ast_debug(1, "Unregistered dynamic logger level '%s' with index %d.\n", name, x);
2018
2019                 update_logchannels();
2020         } else {
2021                 AST_RWLIST_UNLOCK(&logchannels);
2022         }
2023 }
2024