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asterisk/main/logger.c

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2006, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Asterisk Logger
*
* Logging routines
*
* \author Mark Spencer <markster@digium.com>
*/
/*
* define _ASTERISK_LOGGER_H to prevent the inclusion of logger.h;
* it redefines LOG_* which we need to define syslog_level_map.
* Later, we force the inclusion of logger.h again.
*/
#define _ASTERISK_LOGGER_H
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/_private.h"
#include "asterisk/paths.h" /* use ast_config_AST_LOG_DIR */
#include <signal.h>
#include <time.h>
#include <sys/stat.h>
#include <fcntl.h>
#if ((defined(AST_DEVMODE)) && (defined(linux)))
#include <execinfo.h>
#define MAX_BACKTRACE_FRAMES 20
#endif
#define SYSLOG_NAMES /* so we can map syslog facilities names to their numeric values,
from <syslog.h> which is included by logger.h */
#include <syslog.h>
static int syslog_level_map[] = {
LOG_DEBUG,
LOG_INFO, /* arbitrary equivalent of LOG_EVENT */
LOG_NOTICE,
LOG_WARNING,
LOG_ERR,
LOG_DEBUG,
LOG_DEBUG
};
#define SYSLOG_NLEVELS sizeof(syslog_level_map) / sizeof(int)
#undef _ASTERISK_LOGGER_H /* now include logger.h */
#include "asterisk/logger.h"
#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/term.h"
#include "asterisk/cli.h"
#include "asterisk/utils.h"
#include "asterisk/manager.h"
#include "asterisk/threadstorage.h"
#include "asterisk/strings.h"
#include "asterisk/pbx.h"
#if defined(__linux__) && !defined(__NR_gettid)
#include <asm/unistd.h>
#endif
#if defined(__linux__) && defined(__NR_gettid)
#define GETTID() syscall(__NR_gettid)
#else
#define GETTID() getpid()
#endif
static char dateformat[256] = "%b %e %T"; /* Original Asterisk Format */
static char queue_log_name[256] = QUEUELOG;
static char exec_after_rotate[256] = "";
static int filesize_reload_needed;
static int global_logmask = -1;
enum rotatestrategy {
SEQUENTIAL = 1 << 0, /* Original method - create a new file, in order */
ROTATE = 1 << 1, /* Rotate all files, such that the oldest file has the highest suffix */
TIMESTAMP = 1 << 2, /* Append the epoch timestamp onto the end of the archived file */
} rotatestrategy = SEQUENTIAL;
static struct {
unsigned int queue_log:1;
unsigned int event_log:1;
} logfiles = { 1, 1 };
static char hostname[MAXHOSTNAMELEN];
enum logtypes {
LOGTYPE_SYSLOG,
LOGTYPE_FILE,
LOGTYPE_CONSOLE,
};
struct logchannel {
int logmask; /* What to log to this channel */
int disabled; /* If this channel is disabled or not */
int facility; /* syslog facility */
enum logtypes type; /* Type of log channel */
FILE *fileptr; /* logfile logging file pointer */
char filename[256]; /* Filename */
AST_LIST_ENTRY(logchannel) list;
};
static AST_RWLIST_HEAD_STATIC(logchannels, logchannel);
enum logmsgtypes {
LOGMSG_NORMAL = 0,
LOGMSG_VERBOSE,
};
struct logmsg {
enum logmsgtypes type;
char date[256];
int level;
const char *file;
int line;
const char *function;
AST_LIST_ENTRY(logmsg) list;
char str[0];
};
static AST_LIST_HEAD_STATIC(logmsgs, logmsg);
static pthread_t logthread = AST_PTHREADT_NULL;
static ast_cond_t logcond;
static int close_logger_thread;
static FILE *eventlog;
static FILE *qlog;
static char *levels[] = {
"DEBUG",
"EVENT",
"NOTICE",
"WARNING",
"ERROR",
"VERBOSE",
"DTMF"
};
static int colors[] = {
COLOR_BRGREEN,
COLOR_BRBLUE,
COLOR_YELLOW,
COLOR_BRRED,
COLOR_RED,
COLOR_GREEN,
COLOR_BRGREEN
};
AST_THREADSTORAGE(verbose_buf);
#define VERBOSE_BUF_INIT_SIZE 256
AST_THREADSTORAGE(log_buf);
#define LOG_BUF_INIT_SIZE 256
static int make_components(const char *s, int lineno)
{
char *w;
int res = 0;
char *stringp = ast_strdupa(s);
while ((w = strsep(&stringp, ","))) {
w = ast_skip_blanks(w);
if (!strcasecmp(w, "error"))
res |= (1 << __LOG_ERROR);
else if (!strcasecmp(w, "warning"))
res |= (1 << __LOG_WARNING);
else if (!strcasecmp(w, "notice"))
res |= (1 << __LOG_NOTICE);
else if (!strcasecmp(w, "event"))
res |= (1 << __LOG_EVENT);
else if (!strcasecmp(w, "debug"))
res |= (1 << __LOG_DEBUG);
else if (!strcasecmp(w, "verbose"))
res |= (1 << __LOG_VERBOSE);
else if (!strcasecmp(w, "dtmf"))
res |= (1 << __LOG_DTMF);
else {
fprintf(stderr, "Logfile Warning: Unknown keyword '%s' at line %d of logger.conf\n", w, lineno);
}
}
return res;
}
static struct logchannel *make_logchannel(const char *channel, const char *components, int lineno)
{
struct logchannel *chan;
char *facility;
#ifndef SOLARIS
CODE *cptr;
#endif
if (ast_strlen_zero(channel) || !(chan = ast_calloc(1, sizeof(*chan))))
return NULL;
if (!strcasecmp(channel, "console")) {
chan->type = LOGTYPE_CONSOLE;
} else if (!strncasecmp(channel, "syslog", 6)) {
/*
* syntax is:
* syslog.facility => level,level,level
*/
facility = strchr(channel, '.');
if (!facility++ || !facility) {
facility = "local0";
}
#ifndef SOLARIS
/*
* Walk through the list of facilitynames (defined in sys/syslog.h)
* to see if we can find the one we have been given
*/
chan->facility = -1;
cptr = facilitynames;
while (cptr->c_name) {
if (!strcasecmp(facility, cptr->c_name)) {
chan->facility = cptr->c_val;
break;
}
cptr++;
}
#else
chan->facility = -1;
if (!strcasecmp(facility, "kern"))
chan->facility = LOG_KERN;
else if (!strcasecmp(facility, "USER"))
chan->facility = LOG_USER;
else if (!strcasecmp(facility, "MAIL"))
chan->facility = LOG_MAIL;
else if (!strcasecmp(facility, "DAEMON"))
chan->facility = LOG_DAEMON;
else if (!strcasecmp(facility, "AUTH"))
chan->facility = LOG_AUTH;
else if (!strcasecmp(facility, "SYSLOG"))
chan->facility = LOG_SYSLOG;
else if (!strcasecmp(facility, "LPR"))
chan->facility = LOG_LPR;
else if (!strcasecmp(facility, "NEWS"))
chan->facility = LOG_NEWS;
else if (!strcasecmp(facility, "UUCP"))
chan->facility = LOG_UUCP;
else if (!strcasecmp(facility, "CRON"))
chan->facility = LOG_CRON;
else if (!strcasecmp(facility, "LOCAL0"))
chan->facility = LOG_LOCAL0;
else if (!strcasecmp(facility, "LOCAL1"))
chan->facility = LOG_LOCAL1;
else if (!strcasecmp(facility, "LOCAL2"))
chan->facility = LOG_LOCAL2;
else if (!strcasecmp(facility, "LOCAL3"))
chan->facility = LOG_LOCAL3;
else if (!strcasecmp(facility, "LOCAL4"))
chan->facility = LOG_LOCAL4;
else if (!strcasecmp(facility, "LOCAL5"))
chan->facility = LOG_LOCAL5;
else if (!strcasecmp(facility, "LOCAL6"))
chan->facility = LOG_LOCAL6;
else if (!strcasecmp(facility, "LOCAL7"))
chan->facility = LOG_LOCAL7;
#endif /* Solaris */
if (0 > chan->facility) {
fprintf(stderr, "Logger Warning: bad syslog facility in logger.conf\n");
free(chan);
return NULL;
}
chan->type = LOGTYPE_SYSLOG;
snprintf(chan->filename, sizeof(chan->filename), "%s", channel);
openlog("asterisk", LOG_PID, chan->facility);
} else {
if (channel[0] == '/') {
if (!ast_strlen_zero(hostname)) {
snprintf(chan->filename, sizeof(chan->filename) - 1,"%s.%s", channel, hostname);
} else {
ast_copy_string(chan->filename, channel, sizeof(chan->filename));
}
}
if (!ast_strlen_zero(hostname)) {
snprintf(chan->filename, sizeof(chan->filename), "%s/%s.%s", ast_config_AST_LOG_DIR, channel, hostname);
} else {
snprintf(chan->filename, sizeof(chan->filename), "%s/%s", ast_config_AST_LOG_DIR, channel);
}
chan->fileptr = fopen(chan->filename, "a");
if (!chan->fileptr) {
/* Can't log here, since we're called with a lock */
fprintf(stderr, "Logger Warning: Unable to open log file '%s': %s\n", chan->filename, strerror(errno));
}
chan->type = LOGTYPE_FILE;
}
chan->logmask = make_components(components, lineno);
return chan;
}
static void init_logger_chain(int reload, int locked)
{
struct logchannel *chan;
struct ast_config *cfg;
struct ast_variable *var;
const char *s;
struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
if ((cfg = ast_config_load("logger.conf", config_flags)) == CONFIG_STATUS_FILEUNCHANGED)
return;
/* delete our list of log channels */
if (!locked)
AST_RWLIST_WRLOCK(&logchannels);
while ((chan = AST_RWLIST_REMOVE_HEAD(&logchannels, list)))
free(chan);
if (!locked)
AST_RWLIST_UNLOCK(&logchannels);
global_logmask = 0;
errno = 0;
/* close syslog */
closelog();
/* If no config file, we're fine, set default options. */
if (!cfg) {
if (errno)
fprintf(stderr, "Unable to open logger.conf: %s; default settings will be used.\n", strerror(errno));
else
fprintf(stderr, "Errors detected in logger.conf: see above; default settings will be used.\n");
if (!(chan = ast_calloc(1, sizeof(*chan))))
return;
chan->type = LOGTYPE_CONSOLE;
chan->logmask = 28; /*warning,notice,error */
if (!locked)
AST_RWLIST_WRLOCK(&logchannels);
AST_RWLIST_INSERT_HEAD(&logchannels, chan, list);
if (!locked)
AST_RWLIST_UNLOCK(&logchannels);
global_logmask |= chan->logmask;
return;
}
if ((s = ast_variable_retrieve(cfg, "general", "appendhostname"))) {
if (ast_true(s)) {
if (gethostname(hostname, sizeof(hostname) - 1)) {
ast_copy_string(hostname, "unknown", sizeof(hostname));
fprintf(stderr, "What box has no hostname???\n");
}
} else
hostname[0] = '\0';
} else
hostname[0] = '\0';
if ((s = ast_variable_retrieve(cfg, "general", "dateformat")))
ast_copy_string(dateformat, s, sizeof(dateformat));
else
ast_copy_string(dateformat, "%b %e %T", sizeof(dateformat));
if ((s = ast_variable_retrieve(cfg, "general", "queue_log")))
logfiles.queue_log = ast_true(s);
if ((s = ast_variable_retrieve(cfg, "general", "event_log")))
logfiles.event_log = ast_true(s);
if ((s = ast_variable_retrieve(cfg, "general", "queue_log_name")))
ast_copy_string(queue_log_name, s, sizeof(queue_log_name));
if ((s = ast_variable_retrieve(cfg, "general", "exec_after_rotate")))
ast_copy_string(exec_after_rotate, s, sizeof(exec_after_rotate));
if ((s = ast_variable_retrieve(cfg, "general", "rotatestrategy"))) {
if (strcasecmp(s, "timestamp") == 0)
rotatestrategy = TIMESTAMP;
else if (strcasecmp(s, "rotate") == 0)
rotatestrategy = ROTATE;
else if (strcasecmp(s, "sequential") == 0)
rotatestrategy = SEQUENTIAL;
else
fprintf(stderr, "Unknown rotatestrategy: %s\n", s);
} else {
if ((s = ast_variable_retrieve(cfg, "general", "rotatetimestamp"))) {
rotatestrategy = ast_true(s) ? TIMESTAMP : SEQUENTIAL;
fprintf(stderr, "rotatetimestamp option has been deprecated. Please use rotatestrategy instead.\n");
}
}
if (!locked)
AST_RWLIST_WRLOCK(&logchannels);
var = ast_variable_browse(cfg, "logfiles");
for (; var; var = var->next) {
if (!(chan = make_logchannel(var->name, var->value, var->lineno)))
continue;
AST_RWLIST_INSERT_HEAD(&logchannels, chan, list);
global_logmask |= chan->logmask;
}
if (!locked)
AST_RWLIST_UNLOCK(&logchannels);
ast_config_destroy(cfg);
}
void ast_queue_log(const char *queuename, const char *callid, const char *agent, const char *event, const char *fmt, ...)
{
va_list ap;
char qlog_msg[8192];
int qlog_len;
if (qlog) {
va_start(ap, fmt);
qlog_len = snprintf(qlog_msg, sizeof(qlog_msg), "%ld|%s|%s|%s|%s|", (long)time(NULL), callid, queuename, agent, event);
vsnprintf(qlog_msg + qlog_len, sizeof(qlog_msg) - qlog_len, fmt, ap);
va_end(ap);
}
AST_RWLIST_RDLOCK(&logchannels);
if (qlog) {
fprintf(qlog, "%s\n", qlog_msg);
fflush(qlog);
}
AST_RWLIST_UNLOCK(&logchannels);
}
static int rotate_file(const char *filename)
{
char old[PATH_MAX];
char new[PATH_MAX];
int x, y, which, found, res = 0, fd;
char *suffixes[4] = { "", ".gz", ".bz2", ".Z" };
switch (rotatestrategy) {
case SEQUENTIAL:
for (x = 0; ; x++) {
snprintf(new, sizeof(new), "%s.%d", filename, x);
fd = open(new, O_RDONLY);
if (fd > -1)
close(fd);
else
break;
}
if (rename(filename, new)) {
fprintf(stderr, "Unable to rename file '%s' to '%s'\n", filename, new);
res = -1;
}
break;
case TIMESTAMP:
snprintf(new, sizeof(new), "%s.%ld", filename, (long)time(NULL));
if (rename(filename, new)) {
fprintf(stderr, "Unable to rename file '%s' to '%s'\n", filename, new);
res = -1;
}
break;
case ROTATE:
/* Find the next empty slot, including a possible suffix */
for (x = 0; ; x++) {
found = 0;
for (which = 0; which < sizeof(suffixes) / sizeof(suffixes[0]); which++) {
snprintf(new, sizeof(new), "%s.%d%s", filename, x, suffixes[which]);
fd = open(new, O_RDONLY);
if (fd > -1)
close(fd);
else {
found = 1;
break;
}
}
if (!found)
break;
}
/* Found an empty slot */
for (y = x; y > -1; y--) {
for (which = 0; which < sizeof(suffixes) / sizeof(suffixes[0]); which++) {
snprintf(old, sizeof(old), "%s.%d%s", filename, y - 1, suffixes[which]);
fd = open(old, O_RDONLY);
if (fd > -1) {
/* Found the right suffix */
close(fd);
snprintf(new, sizeof(new), "%s.%d%s", filename, y, suffixes[which]);
if (rename(old, new)) {
fprintf(stderr, "Unable to rename file '%s' to '%s'\n", old, new);
res = -1;
}
break;
}
}
}
/* Finally, rename the current file */
snprintf(new, sizeof(new), "%s.0", filename);
if (rename(filename, new)) {
fprintf(stderr, "Unable to rename file '%s' to '%s'\n", filename, new);
res = -1;
}
}
if (!ast_strlen_zero(exec_after_rotate)) {
struct ast_channel *c = ast_channel_alloc(0, 0, "", "", "", "", "", 0, "Logger/rotate");
char buf[512];
pbx_builtin_setvar_helper(c, "filename", filename);
pbx_substitute_variables_helper(c, exec_after_rotate, buf, sizeof(buf));
system(buf);
ast_channel_free(c);
}
return res;
}
static int reload_logger(int rotate)
{
char old[PATH_MAX] = "";
int event_rotate = rotate, queue_rotate = rotate;
struct logchannel *f;
int res = 0;
struct stat st;
AST_RWLIST_WRLOCK(&logchannels);
if (eventlog) {
if (rotate < 0) {
/* Check filesize - this one typically doesn't need an auto-rotate */
snprintf(old, sizeof(old), "%s/%s", ast_config_AST_LOG_DIR, EVENTLOG);
if (stat(old, &st) != 0 || st.st_size > 0x40000000) { /* Arbitrarily, 1 GB */
fclose(eventlog);
eventlog = NULL;
} else
event_rotate = 0;
} else {
fclose(eventlog);
eventlog = NULL;
}
} else
event_rotate = 0;
if (qlog) {
if (rotate < 0) {
/* Check filesize - this one typically doesn't need an auto-rotate */
snprintf(old, sizeof(old), "%s/%s", ast_config_AST_LOG_DIR, queue_log_name);
if (stat(old, &st) != 0 || st.st_size > 0x40000000) { /* Arbitrarily, 1 GB */
fclose(qlog);
qlog = NULL;
} else
event_rotate = 0;
} else {
fclose(qlog);
qlog = NULL;
}
} else
queue_rotate = 0;
qlog = NULL;
ast_mkdir(ast_config_AST_LOG_DIR, 0777);
AST_RWLIST_TRAVERSE(&logchannels, f, list) {
if (f->disabled) {
f->disabled = 0; /* Re-enable logging at reload */
manager_event(EVENT_FLAG_SYSTEM, "LogChannel", "Channel: %s\r\nEnabled: Yes\r\n", f->filename);
}
if (f->fileptr && (f->fileptr != stdout) && (f->fileptr != stderr)) {
fclose(f->fileptr); /* Close file */
f->fileptr = NULL;
if (rotate)
rotate_file(f->filename);
}
}
filesize_reload_needed = 0;
init_logger_chain(rotate ? 0 : 1 /* reload */, 1 /* locked */);
if (logfiles.event_log) {
snprintf(old, sizeof(old), "%s/%s", ast_config_AST_LOG_DIR, EVENTLOG);
if (event_rotate)
rotate_file(old);
eventlog = fopen(old, "a");
if (eventlog) {
ast_log(LOG_EVENT, "Restarted Asterisk Event Logger\n");
if (option_verbose)
ast_verbose("Asterisk Event Logger restarted\n");
} else {
ast_log(LOG_ERROR, "Unable to create event log: %s\n", strerror(errno));
res = -1;
}
}
if (logfiles.queue_log) {
snprintf(old, sizeof(old), "%s/%s", ast_config_AST_LOG_DIR, queue_log_name);
if (queue_rotate)
rotate_file(old);
qlog = fopen(old, "a");
if (qlog) {
AST_RWLIST_UNLOCK(&logchannels);
ast_queue_log("NONE", "NONE", "NONE", "CONFIGRELOAD", "%s", "");
AST_RWLIST_WRLOCK(&logchannels);
ast_log(LOG_EVENT, "Restarted Asterisk Queue Logger\n");
if (option_verbose)
ast_verbose("Asterisk Queue Logger restarted\n");
} else {
ast_log(LOG_ERROR, "Unable to create queue log: %s\n", strerror(errno));
res = -1;
}
}
AST_RWLIST_UNLOCK(&logchannels);
return res;
}
static char *handle_logger_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
switch (cmd) {
case CLI_INIT:
e->command = "logger reload";
e->usage =
"Usage: logger reload\n"
" Reloads the logger subsystem state. Use after restarting syslogd(8) if you are using syslog logging.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (reload_logger(0)) {
ast_cli(a->fd, "Failed to reload the logger\n");
return CLI_FAILURE;
} else
return CLI_SUCCESS;
}
static char *handle_logger_rotate(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
switch (cmd) {
case CLI_INIT:
e->command = "logger rotate";
e->usage =
"Usage: logger rotate\n"
" Rotates and Reopens the log files.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (reload_logger(1)) {
ast_cli(a->fd, "Failed to reload the logger and rotate log files\n");
return CLI_FAILURE;
} else
return CLI_SUCCESS;
}
/*! \brief CLI command to show logging system configuration */
static char *handle_logger_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
#define FORMATL "%-35.35s %-8.8s %-9.9s "
struct logchannel *chan;
switch (cmd) {
case CLI_INIT:
e->command = "logger show channels";
e->usage =
"Usage: logger show channels\n"
" List configured logger channels.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
ast_cli(a->fd,FORMATL, "Channel", "Type", "Status");
ast_cli(a->fd, "Configuration\n");
ast_cli(a->fd,FORMATL, "-------", "----", "------");
ast_cli(a->fd, "-------------\n");
AST_RWLIST_RDLOCK(&logchannels);
AST_RWLIST_TRAVERSE(&logchannels, chan, list) {
ast_cli(a->fd, FORMATL, chan->filename, chan->type==LOGTYPE_CONSOLE ? "Console" : (chan->type==LOGTYPE_SYSLOG ? "Syslog" : "File"),
chan->disabled ? "Disabled" : "Enabled");
ast_cli(a->fd, " - ");
if (chan->logmask & (1 << __LOG_DEBUG))
ast_cli(a->fd, "Debug ");
if (chan->logmask & (1 << __LOG_DTMF))
ast_cli(a->fd, "DTMF ");
if (chan->logmask & (1 << __LOG_VERBOSE))
ast_cli(a->fd, "Verbose ");
if (chan->logmask & (1 << __LOG_WARNING))
ast_cli(a->fd, "Warning ");
if (chan->logmask & (1 << __LOG_NOTICE))
ast_cli(a->fd, "Notice ");
if (chan->logmask & (1 << __LOG_ERROR))
ast_cli(a->fd, "Error ");
if (chan->logmask & (1 << __LOG_EVENT))
ast_cli(a->fd, "Event ");
ast_cli(a->fd, "\n");
}
AST_RWLIST_UNLOCK(&logchannels);
ast_cli(a->fd, "\n");
return CLI_SUCCESS;
}
struct verb {
void (*verboser)(const char *string);
AST_LIST_ENTRY(verb) list;
};
static AST_RWLIST_HEAD_STATIC(verbosers, verb);
static struct ast_cli_entry cli_logger[] = {
AST_CLI_DEFINE(handle_logger_show_channels, "List configured log channels"),
AST_CLI_DEFINE(handle_logger_reload, "Reopens the log files"),
AST_CLI_DEFINE(handle_logger_rotate, "Rotates and reopens the log files")
};
static int handle_SIGXFSZ(int sig)
{
/* Indicate need to reload */
filesize_reload_needed = 1;
return 0;
}
static void ast_log_vsyslog(int level, const char *file, int line, const char *function, char *str)
{
char buf[BUFSIZ];
if (level >= SYSLOG_NLEVELS) {
/* we are locked here, so cannot ast_log() */
fprintf(stderr, "ast_log_vsyslog called with bogus level: %d\n", level);
return;
}
if (level == __LOG_VERBOSE) {
snprintf(buf, sizeof(buf), "VERBOSE[%ld]: %s", (long)GETTID(), str);
level = __LOG_DEBUG;
} else if (level == __LOG_DTMF) {
snprintf(buf, sizeof(buf), "DTMF[%ld]: %s", (long)GETTID(), str);
level = __LOG_DEBUG;
} else {
snprintf(buf, sizeof(buf), "%s[%ld]: %s:%d in %s: %s",
levels[level], (long)GETTID(), file, line, function, str);
}
term_strip(buf, buf, strlen(buf) + 1);
syslog(syslog_level_map[level], "%s", buf);
}
/* Print a normal log message to the channels */
static void logger_print_normal(struct logmsg *logmsg)
{
struct logchannel *chan = NULL;
char buf[BUFSIZ];
AST_RWLIST_RDLOCK(&logchannels);
if (logfiles.event_log && logmsg->level == __LOG_EVENT) {
fprintf(eventlog, "%s asterisk[%ld]: %s", logmsg->date, (long)getpid(), logmsg->str);
fflush(eventlog);
AST_RWLIST_UNLOCK(&logchannels);
return;
}
if (!AST_RWLIST_EMPTY(&logchannels)) {
AST_RWLIST_TRAVERSE(&logchannels, chan, list) {
/* If the channel is disabled, then move on to the next one */
if (chan->disabled)
continue;
/* Check syslog channels */
if (chan->type == LOGTYPE_SYSLOG && (chan->logmask & (1 << logmsg->level))) {
ast_log_vsyslog(logmsg->level, logmsg->file, logmsg->line, logmsg->function, logmsg->str);
/* Console channels */
} else if (chan->type == LOGTYPE_CONSOLE && (chan->logmask & (1 << logmsg->level))) {
char linestr[128];
char tmp1[80], tmp2[80], tmp3[80], tmp4[80];
/* If the level is verbose, then skip it */
if (logmsg->level == __LOG_VERBOSE)
continue;
/* Turn the numerical line number into a string */
snprintf(linestr, sizeof(linestr), "%d", logmsg->line);
/* Build string to print out */
snprintf(buf, sizeof(buf), "[%s] %s[%ld]: %s:%s %s: %s",
logmsg->date,
term_color(tmp1, levels[logmsg->level], colors[logmsg->level], 0, sizeof(tmp1)),
(long)GETTID(),
term_color(tmp2, logmsg->file, COLOR_BRWHITE, 0, sizeof(tmp2)),
term_color(tmp3, linestr, COLOR_BRWHITE, 0, sizeof(tmp3)),
term_color(tmp4, logmsg->function, COLOR_BRWHITE, 0, sizeof(tmp4)),
logmsg->str);
/* Print out */
ast_console_puts_mutable(buf);
/* File channels */
} else if (chan->type == LOGTYPE_FILE && (chan->logmask & (1 << logmsg->level))) {
int res = 0;
/* If no file pointer exists, skip it */
if (!chan->fileptr)
continue;
/* Print out to the file */
res = fprintf(chan->fileptr, "[%s] %s[%ld] %s: %s",
logmsg->date, levels[logmsg->level], (long)GETTID(), logmsg->file, logmsg->str);
if (res <= 0 && !ast_strlen_zero(logmsg->str)) {
fprintf(stderr, "**** Asterisk Logging Error: ***********\n");
if (errno == ENOMEM || errno == ENOSPC)
fprintf(stderr, "Asterisk logging error: Out of disk space, can't log to log file %s\n", chan->filename);
else
fprintf(stderr, "Logger Warning: Unable to write to log file '%s': %s (disabled)\n", chan->filename, strerror(errno));
manager_event(EVENT_FLAG_SYSTEM, "LogChannel", "Channel: %s\r\nEnabled: No\r\nReason: %d - %s\r\n", chan->filename, errno, strerror(errno));
chan->disabled = 1;
} else if (res > 0) {
fflush(chan->fileptr);
}
}
}
} else if (logmsg->level != __LOG_VERBOSE) {
fputs(logmsg->str, stdout);
}
AST_RWLIST_UNLOCK(&logchannels);
/* If we need to reload because of the file size, then do so */
if (filesize_reload_needed) {
reload_logger(-1);
ast_log(LOG_EVENT, "Rotated Logs Per SIGXFSZ (Exceeded file size limit)\n");
if (option_verbose)
ast_verbose("Rotated Logs Per SIGXFSZ (Exceeded file size limit)\n");
}
return;
}
/* Print a verbose message to the verbosers */
static void logger_print_verbose(struct logmsg *logmsg)
{
struct verb *v = NULL;
/* Iterate through the list of verbosers and pass them the log message string */
AST_RWLIST_RDLOCK(&verbosers);
AST_RWLIST_TRAVERSE(&verbosers, v, list)
v->verboser(logmsg->str);
AST_RWLIST_UNLOCK(&verbosers);
return;
}
/* Actual logging thread */
static void *logger_thread(void *data)
{
struct logmsg *next = NULL, *msg = NULL;
for (;;) {
/* We lock the message list, and see if any message exists... if not we wait on the condition to be signalled */
AST_LIST_LOCK(&logmsgs);
if (AST_LIST_EMPTY(&logmsgs))
ast_cond_wait(&logcond, &logmsgs.lock);
next = AST_LIST_FIRST(&logmsgs);
AST_LIST_HEAD_INIT_NOLOCK(&logmsgs);
AST_LIST_UNLOCK(&logmsgs);
/* Otherwise go through and process each message in the order added */
while ((msg = next)) {
/* Get the next entry now so that we can free our current structure later */
next = AST_LIST_NEXT(msg, list);
/* Depending on the type, send it to the proper function */
if (msg->type == LOGMSG_NORMAL)
logger_print_normal(msg);
else if (msg->type == LOGMSG_VERBOSE)
logger_print_verbose(msg);
/* Free the data since we are done */
free(msg);
}
/* If we should stop, then stop */
if (close_logger_thread)
break;
}
return NULL;
}
int init_logger(void)
{
char tmp[256];
int res = 0;
/* auto rotate if sig SIGXFSZ comes a-knockin */
(void) signal(SIGXFSZ,(void *) handle_SIGXFSZ);
/* start logger thread */
ast_cond_init(&logcond, NULL);
if (ast_pthread_create(&logthread, NULL, logger_thread, NULL) < 0) {
ast_cond_destroy(&logcond);
return -1;
}
/* register the logger cli commands */
ast_cli_register_multiple(cli_logger, sizeof(cli_logger) / sizeof(struct ast_cli_entry));
ast_mkdir(ast_config_AST_LOG_DIR, 0777);
/* create log channels */
init_logger_chain(0 /* reload */, 0 /* locked */);
/* create the eventlog */
if (logfiles.event_log) {
snprintf(tmp, sizeof(tmp), "%s/%s", ast_config_AST_LOG_DIR, EVENTLOG);
eventlog = fopen(tmp, "a");
if (eventlog) {
ast_log(LOG_EVENT, "Started Asterisk Event Logger\n");
if (option_verbose)
ast_verbose("Asterisk Event Logger Started %s\n", tmp);
} else {
ast_log(LOG_ERROR, "Unable to create event log: %s\n", strerror(errno));
res = -1;
}
}
if (logfiles.queue_log) {
snprintf(tmp, sizeof(tmp), "%s/%s", ast_config_AST_LOG_DIR, queue_log_name);
qlog = fopen(tmp, "a");
ast_queue_log("NONE", "NONE", "NONE", "QUEUESTART", "%s", "");
}
return res;
}
void close_logger(void)
{
struct logchannel *f = NULL;
/* Stop logger thread */
AST_LIST_LOCK(&logmsgs);
close_logger_thread = 1;
ast_cond_signal(&logcond);
AST_LIST_UNLOCK(&logmsgs);
if (logthread != AST_PTHREADT_NULL)
pthread_join(logthread, NULL);
AST_RWLIST_WRLOCK(&logchannels);
if (eventlog) {
fclose(eventlog);
eventlog = NULL;
}
if (qlog) {
fclose(qlog);
qlog = NULL;
}
AST_RWLIST_TRAVERSE(&logchannels, f, list) {
if (f->fileptr && (f->fileptr != stdout) && (f->fileptr != stderr)) {
fclose(f->fileptr);
f->fileptr = NULL;
}
}
closelog(); /* syslog */
AST_RWLIST_UNLOCK(&logchannels);
return;
}
/*!
* \brief send log messages to syslog and/or the console
*/
void ast_log(int level, const char *file, int line, const char *function, const char *fmt, ...)
{
struct logmsg *logmsg = NULL;
struct ast_str *buf = NULL;
struct ast_tm tm;
struct timeval tv = ast_tvnow();
int res = 0;
va_list ap;
if (!(buf = ast_str_thread_get(&log_buf, LOG_BUF_INIT_SIZE)))
return;
if (AST_RWLIST_EMPTY(&logchannels)) {
/*
* we don't have the logger chain configured yet,
* so just log to stdout
*/
if (level != __LOG_VERBOSE) {
int res;
va_start(ap, fmt);
res = ast_str_set_va(&buf, BUFSIZ, fmt, ap); /* XXX BUFSIZ ? */
va_end(ap);
if (res != AST_DYNSTR_BUILD_FAILED) {
term_filter_escapes(buf->str);
fputs(buf->str, stdout);
}
}
return;
}
/* don't display LOG_DEBUG messages unless option_verbose _or_ option_debug
are non-zero; LOG_DEBUG messages can still be displayed if option_debug
is zero, if option_verbose is non-zero (this allows for 'level zero'
LOG_DEBUG messages to be displayed, if the logmask on any channel
allows it)
*/
if (!option_verbose && !option_debug && (level == __LOG_DEBUG))
return;
/* Ignore anything that never gets logged anywhere */
if (!(global_logmask & (1 << level)))
return;
/* Build string */
va_start(ap, fmt);
res = ast_str_set_va(&buf, BUFSIZ, fmt, ap);
va_end(ap);
/* If the build failed, then abort and free this structure */
if (res == AST_DYNSTR_BUILD_FAILED)
return;
/* Create a new logging message */
if (!(logmsg = ast_calloc(1, sizeof(*logmsg) + res + 1)))
return;
/* Copy string over */
strcpy(logmsg->str, buf->str);
/* Set type to be normal */
logmsg->type = LOGMSG_NORMAL;
/* Create our date/time */
ast_localtime(&tv, &tm, NULL);
ast_strftime(logmsg->date, sizeof(logmsg->date), dateformat, &tm);
/* Copy over data */
logmsg->level = level;
logmsg->file = file;
logmsg->line = line;
logmsg->function = function;
/* If the logger thread is active, append it to the tail end of the list - otherwise skip that step */
if (logthread != AST_PTHREADT_NULL) {
AST_LIST_LOCK(&logmsgs);
AST_LIST_INSERT_TAIL(&logmsgs, logmsg, list);
ast_cond_signal(&logcond);
AST_LIST_UNLOCK(&logmsgs);
} else {
logger_print_normal(logmsg);
free(logmsg);
}
return;
}
void ast_backtrace(void)
{
#ifdef linux
#ifdef AST_DEVMODE
int count=0, i=0;
void **addresses;
char **strings;
if ((addresses = ast_calloc(MAX_BACKTRACE_FRAMES, sizeof(*addresses)))) {
count = backtrace(addresses, MAX_BACKTRACE_FRAMES);
if ((strings = backtrace_symbols(addresses, count))) {
ast_debug(1, "Got %d backtrace record%c\n", count, count != 1 ? 's' : ' ');
for (i=0; i < count ; i++) {
#if __WORDSIZE == 32
ast_log(LOG_DEBUG, "#%d: [%08X] %s\n", i, (unsigned int)addresses[i], strings[i]);
#elif __WORDSIZE == 64
ast_log(LOG_DEBUG, "#%d: [%016lX] %s\n", i, (unsigned long)addresses[i], strings[i]);
#endif
}
free(strings);
} else {
ast_debug(1, "Could not allocate memory for backtrace\n");
}
free(addresses);
}
#else
ast_log(LOG_WARNING, "Must run configure with '--enable-dev-mode' for stack backtraces.\n");
#endif
#else /* ndef linux */
ast_log(LOG_WARNING, "Inline stack backtraces are only available on the Linux platform.\n");
#endif
}
void ast_verbose(const char *fmt, ...)
{
struct logmsg *logmsg = NULL;
struct ast_str *buf = NULL;
int res = 0;
va_list ap;
if (!(buf = ast_str_thread_get(&verbose_buf, VERBOSE_BUF_INIT_SIZE)))
return;
if (ast_opt_timestamp) {
struct timeval tv;
struct ast_tm tm;
char date[40];
char *datefmt;
tv = ast_tvnow();
ast_localtime(&tv, &tm, NULL);
ast_strftime(date, sizeof(date), dateformat, &tm);
datefmt = alloca(strlen(date) + 3 + strlen(fmt) + 1);
sprintf(datefmt, "[%s] %s", date, fmt);
fmt = datefmt;
}
/* Build string */
va_start(ap, fmt);
res = ast_str_set_va(&buf, 0, fmt, ap);
va_end(ap);
/* If the build failed then we can drop this allocated message */
if (res == AST_DYNSTR_BUILD_FAILED)
return;
if (!(logmsg = ast_calloc(1, sizeof(*logmsg) + res + 1)))
return;
strcpy(logmsg->str, buf->str);
ast_log(LOG_VERBOSE, logmsg->str);
/* Set type */
logmsg->type = LOGMSG_VERBOSE;
/* Add to the list and poke the thread if possible */
if (logthread != AST_PTHREADT_NULL) {
AST_LIST_LOCK(&logmsgs);
AST_LIST_INSERT_TAIL(&logmsgs, logmsg, list);
ast_cond_signal(&logcond);
AST_LIST_UNLOCK(&logmsgs);
} else {
logger_print_verbose(logmsg);
free(logmsg);
}
}
int ast_register_verbose(void (*v)(const char *string))
{
struct verb *verb;
if (!(verb = ast_malloc(sizeof(*verb))))
return -1;
verb->verboser = v;
AST_RWLIST_WRLOCK(&verbosers);
AST_RWLIST_INSERT_HEAD(&verbosers, verb, list);
AST_RWLIST_UNLOCK(&verbosers);
return 0;
}
int ast_unregister_verbose(void (*v)(const char *string))
{
struct verb *cur;
AST_RWLIST_WRLOCK(&verbosers);
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&verbosers, cur, list) {
if (cur->verboser == v) {
AST_RWLIST_REMOVE_CURRENT(list);
free(cur);
break;
}
}
AST_RWLIST_TRAVERSE_SAFE_END;
AST_RWLIST_UNLOCK(&verbosers);
return cur ? 0 : -1;
}
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