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netdata/libnetdata/log/log.c

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// SPDX-License-Identifier: GPL-3.0-or-later
#include <daemon/main.h>
#include "../libnetdata.h"
int web_server_is_multithreaded = 1;
const char *program_name = "";
uint64_t debug_flags = 0;
int access_log_syslog = 1;
int error_log_syslog = 1;
int output_log_syslog = 1; // debug log
int stdaccess_fd = -1;
FILE *stdaccess = NULL;
const char *stdaccess_filename = NULL;
const char *stderr_filename = NULL;
const char *stdout_filename = NULL;
const char *facility_log = NULL;
#ifdef ENABLE_ACLK
const char *aclklog_filename = NULL;
int aclklog_fd = -1;
FILE *aclklog = NULL;
int aclklog_syslog = 1;
int aclklog_enabled = 0;
#endif
// ----------------------------------------------------------------------------
// Log facility(https://tools.ietf.org/html/rfc5424)
//
// The facilities accepted in the Netdata are in according with the following
// header files for their respective operating system:
// sys/syslog.h (Linux )
// sys/sys/syslog.h (FreeBSD)
// bsd/sys/syslog.h (darwin-xnu)
#define LOG_AUTH_KEY "auth"
#define LOG_AUTHPRIV_KEY "authpriv"
#ifdef __FreeBSD__
# define LOG_CONSOLE_KEY "console"
#endif
#define LOG_CRON_KEY "cron"
#define LOG_DAEMON_KEY "daemon"
#define LOG_FTP_KEY "ftp"
#ifdef __APPLE__
# define LOG_INSTALL_KEY "install"
#endif
#define LOG_KERN_KEY "kern"
#define LOG_LPR_KEY "lpr"
#define LOG_MAIL_KEY "mail"
//#define LOG_INTERNAL_MARK_KEY "mark"
#ifdef __APPLE__
# define LOG_NETINFO_KEY "netinfo"
# define LOG_RAS_KEY "ras"
# define LOG_REMOTEAUTH_KEY "remoteauth"
#endif
#define LOG_NEWS_KEY "news"
#ifdef __FreeBSD__
# define LOG_NTP_KEY "ntp"
#endif
#define LOG_SECURITY_KEY "security"
#define LOG_SYSLOG_KEY "syslog"
#define LOG_USER_KEY "user"
#define LOG_UUCP_KEY "uucp"
#ifdef __APPLE__
# define LOG_LAUNCHD_KEY "launchd"
#endif
#define LOG_LOCAL0_KEY "local0"
#define LOG_LOCAL1_KEY "local1"
#define LOG_LOCAL2_KEY "local2"
#define LOG_LOCAL3_KEY "local3"
#define LOG_LOCAL4_KEY "local4"
#define LOG_LOCAL5_KEY "local5"
#define LOG_LOCAL6_KEY "local6"
#define LOG_LOCAL7_KEY "local7"
static int log_facility_id(const char *facility_name)
{
static int
hash_auth = 0,
hash_authpriv = 0,
#ifdef __FreeBSD__
hash_console = 0,
#endif
hash_cron = 0,
hash_daemon = 0,
hash_ftp = 0,
#ifdef __APPLE__
hash_install = 0,
#endif
hash_kern = 0,
hash_lpr = 0,
hash_mail = 0,
// hash_mark = 0,
#ifdef __APPLE__
hash_netinfo = 0,
hash_ras = 0,
hash_remoteauth = 0,
#endif
hash_news = 0,
#ifdef __FreeBSD__
hash_ntp = 0,
#endif
hash_security = 0,
hash_syslog = 0,
hash_user = 0,
hash_uucp = 0,
#ifdef __APPLE__
hash_launchd = 0,
#endif
hash_local0 = 0,
hash_local1 = 0,
hash_local2 = 0,
hash_local3 = 0,
hash_local4 = 0,
hash_local5 = 0,
hash_local6 = 0,
hash_local7 = 0;
if(unlikely(!hash_auth))
{
hash_auth = simple_hash(LOG_AUTH_KEY);
hash_authpriv = simple_hash(LOG_AUTHPRIV_KEY);
#ifdef __FreeBSD__
hash_console = simple_hash(LOG_CONSOLE_KEY);
#endif
hash_cron = simple_hash(LOG_CRON_KEY);
hash_daemon = simple_hash(LOG_DAEMON_KEY);
hash_ftp = simple_hash(LOG_FTP_KEY);
#ifdef __APPLE__
hash_install = simple_hash(LOG_INSTALL_KEY);
#endif
hash_kern = simple_hash(LOG_KERN_KEY);
hash_lpr = simple_hash(LOG_LPR_KEY);
hash_mail = simple_hash(LOG_MAIL_KEY);
// hash_mark = simple_uhash();
#ifdef __APPLE__
hash_netinfo = simple_hash(LOG_NETINFO_KEY);
hash_ras = simple_hash(LOG_RAS_KEY);
hash_remoteauth = simple_hash(LOG_REMOTEAUTH_KEY);
#endif
hash_news = simple_hash(LOG_NEWS_KEY);
#ifdef __FreeBSD__
hash_ntp = simple_hash(LOG_NTP_KEY);
#endif
hash_security = simple_hash(LOG_SECURITY_KEY);
hash_syslog = simple_hash(LOG_SYSLOG_KEY);
hash_user = simple_hash(LOG_USER_KEY);
hash_uucp = simple_hash(LOG_UUCP_KEY);
#ifdef __APPLE__
hash_launchd = simple_hash(LOG_LAUNCHD_KEY);
#endif
hash_local0 = simple_hash(LOG_LOCAL0_KEY);
hash_local1 = simple_hash(LOG_LOCAL1_KEY);
hash_local2 = simple_hash(LOG_LOCAL2_KEY);
hash_local3 = simple_hash(LOG_LOCAL3_KEY);
hash_local4 = simple_hash(LOG_LOCAL4_KEY);
hash_local5 = simple_hash(LOG_LOCAL5_KEY);
hash_local6 = simple_hash(LOG_LOCAL6_KEY);
hash_local7 = simple_hash(LOG_LOCAL7_KEY);
}
int hash = simple_hash(facility_name);
if ( hash == hash_auth )
{
return LOG_AUTH;
}
else if ( hash == hash_authpriv )
{
return LOG_AUTHPRIV;
}
#ifdef __FreeBSD__
else if ( hash == hash_console )
{
return LOG_CONSOLE;
}
#endif
else if ( hash == hash_cron )
{
return LOG_CRON;
}
else if ( hash == hash_daemon )
{
return LOG_DAEMON;
}
else if ( hash == hash_ftp )
{
return LOG_FTP;
}
#ifdef __APPLE__
else if ( hash == hash_install )
{
return LOG_INSTALL;
}
#endif
else if ( hash == hash_kern )
{
return LOG_KERN;
}
else if ( hash == hash_lpr )
{
return LOG_LPR;
}
else if ( hash == hash_mail )
{
return LOG_MAIL;
}
/*
else if ( hash == hash_mark )
{
//this is internal for all OS
return INTERNAL_MARK;
}
*/
#ifdef __APPLE__
else if ( hash == hash_netinfo )
{
return LOG_NETINFO;
}
else if ( hash == hash_ras )
{
return LOG_RAS;
}
else if ( hash == hash_remoteauth )
{
return LOG_REMOTEAUTH;
}
#endif
else if ( hash == hash_news )
{
return LOG_NEWS;
}
#ifdef __FreeBSD__
else if ( hash == hash_ntp )
{
return LOG_NTP;
}
#endif
else if ( hash == hash_security )
{
//FreeBSD is the unique that does not consider
//this facility deprecated. We are keeping
//it for other OS while they are kept in their headers.
#ifdef __FreeBSD__
return LOG_SECURITY;
#else
return LOG_AUTH;
#endif
}
else if ( hash == hash_syslog )
{
return LOG_SYSLOG;
}
else if ( hash == hash_user )
{
return LOG_USER;
}
else if ( hash == hash_uucp )
{
return LOG_UUCP;
}
else if ( hash == hash_local0 )
{
return LOG_LOCAL0;
}
else if ( hash == hash_local1 )
{
return LOG_LOCAL1;
}
else if ( hash == hash_local2 )
{
return LOG_LOCAL2;
}
else if ( hash == hash_local3 )
{
return LOG_LOCAL3;
}
else if ( hash == hash_local4 )
{
return LOG_LOCAL4;
}
else if ( hash == hash_local5 )
{
return LOG_LOCAL5;
}
else if ( hash == hash_local6 )
{
return LOG_LOCAL6;
}
else if ( hash == hash_local7 )
{
return LOG_LOCAL7;
}
#ifdef __APPLE__
else if ( hash == hash_launchd )
{
return LOG_LAUNCHD;
}
#endif
return LOG_DAEMON;
}
//we do not need to use this now, but I already created this function to be
//used case necessary.
/*
char *log_facility_name(int code)
{
char *defvalue = { "daemon" };
switch(code)
{
case LOG_AUTH:
{
return "auth";
}
case LOG_AUTHPRIV:
{
return "authpriv";
}
#ifdef __FreeBSD__
case LOG_CONSOLE:
{
return "console";
}
#endif
case LOG_CRON:
{
return "cron";
}
case LOG_DAEMON:
{
return defvalue;
}
case LOG_FTP:
{
return "ftp";
}
#ifdef __APPLE__
case LOG_INSTALL:
{
return "install";
}
#endif
case LOG_KERN:
{
return "kern";
}
case LOG_LPR:
{
return "lpr";
}
case LOG_MAIL:
{
return "mail";
}
#ifdef __APPLE__
case LOG_NETINFO:
{
return "netinfo" ;
}
case LOG_RAS:
{
return "ras";
}
case LOG_REMOTEAUTH:
{
return "remoteauth";
}
#endif
case LOG_NEWS:
{
return "news";
}
#ifdef __FreeBSD__
case LOG_NTP:
{
return "ntp" ;
}
case LOG_SECURITY:
{
return "security";
}
#endif
case LOG_SYSLOG:
{
return "syslog";
}
case LOG_USER:
{
return "user";
}
case LOG_UUCP:
{
return "uucp";
}
case LOG_LOCAL0:
{
return "local0";
}
case LOG_LOCAL1:
{
return "local1";
}
case LOG_LOCAL2:
{
return "local2";
}
case LOG_LOCAL3:
{
return "local3";
}
case LOG_LOCAL4:
{
return "local4" ;
}
case LOG_LOCAL5:
{
return "local5";
}
case LOG_LOCAL6:
{
return "local6";
}
case LOG_LOCAL7:
{
return "local7" ;
}
#ifdef __APPLE__
case LOG_LAUNCHD:
{
return "launchd";
}
#endif
}
return defvalue;
}
*/
// ----------------------------------------------------------------------------
void syslog_init() {
static int i = 0;
if(!i) {
openlog(program_name, LOG_PID,log_facility_id(facility_log));
i = 1;
}
}
#define LOG_DATE_LENGTH 26
static inline void log_date(char *buffer, size_t len) {
if(unlikely(!buffer || !len))
return;
time_t t;
struct tm *tmp, tmbuf;
t = now_realtime_sec();
tmp = localtime_r(&t, &tmbuf);
if (tmp == NULL) {
buffer[0] = '\0';
return;
}
if (unlikely(strftime(buffer, len, "%Y-%m-%d %H:%M:%S", tmp) == 0))
buffer[0] = '\0';
buffer[len - 1] = '\0';
}
static netdata_mutex_t log_mutex = NETDATA_MUTEX_INITIALIZER;
static inline void log_lock() {
netdata_mutex_lock(&log_mutex);
}
static inline void log_unlock() {
netdata_mutex_unlock(&log_mutex);
}
static FILE *open_log_file(int fd, FILE *fp, const char *filename, int *enabled_syslog, int is_stdaccess, int *fd_ptr) {
int f, devnull = 0;
if(!filename || !*filename || !strcmp(filename, "none") || !strcmp(filename, "/dev/null")) {
filename = "/dev/null";
devnull = 1;
}
if(!strcmp(filename, "syslog")) {
filename = "/dev/null";
devnull = 1;
syslog_init();
if(enabled_syslog) *enabled_syslog = 1;
}
else if(enabled_syslog) *enabled_syslog = 0;
// don't do anything if the user is willing
// to have the standard one
if(!strcmp(filename, "system")) {
if(fd != -1 && !is_stdaccess) {
if(fd_ptr) *fd_ptr = fd;
return fp;
}
filename = "stderr";
}
if(!strcmp(filename, "stdout"))
f = STDOUT_FILENO;
else if(!strcmp(filename, "stderr"))
f = STDERR_FILENO;
else {
f = open(filename, O_WRONLY | O_APPEND | O_CREAT, 0664);
if(f == -1) {
error("Cannot open file '%s'. Leaving %d to its default.", filename, fd);
if(fd_ptr) *fd_ptr = fd;
return fp;
}
}
// if there is a level-2 file pointer
// flush it before switching the level-1 fds
if(fp)
fflush(fp);
if(devnull && is_stdaccess) {
fd = -1;
fp = NULL;
}
if(fd != f && fd != -1) {
// it automatically closes
int t = dup2(f, fd);
if (t == -1) {
error("Cannot dup2() new fd %d to old fd %d for '%s'", f, fd, filename);
close(f);
if(fd_ptr) *fd_ptr = fd;
return fp;
}
// info("dup2() new fd %d to old fd %d for '%s'", f, fd, filename);
close(f);
}
else fd = f;
if(!fp) {
fp = fdopen(fd, "a");
if (!fp)
error("Cannot fdopen() fd %d ('%s')", fd, filename);
else {
if (setvbuf(fp, NULL, _IOLBF, 0) != 0)
error("Cannot set line buffering on fd %d ('%s')", fd, filename);
}
}
if(fd_ptr) *fd_ptr = fd;
return fp;
}
void reopen_all_log_files() {
if(stdout_filename)
open_log_file(STDOUT_FILENO, stdout, stdout_filename, &output_log_syslog, 0, NULL);
if(stderr_filename)
open_log_file(STDERR_FILENO, stderr, stderr_filename, &error_log_syslog, 0, NULL);
#ifdef ENABLE_ACLK
if (aclklog_enabled)
aclklog = open_log_file(aclklog_fd, aclklog, aclklog_filename, NULL, 0, &aclklog_fd);
#endif
if(stdaccess_filename)
stdaccess = open_log_file(stdaccess_fd, stdaccess, stdaccess_filename, &access_log_syslog, 1, &stdaccess_fd);
}
void open_all_log_files() {
// disable stdin
open_log_file(STDIN_FILENO, stdin, "/dev/null", NULL, 0, NULL);
open_log_file(STDOUT_FILENO, stdout, stdout_filename, &output_log_syslog, 0, NULL);
open_log_file(STDERR_FILENO, stderr, stderr_filename, &error_log_syslog, 0, NULL);
#ifdef ENABLE_ACLK
if(aclklog_enabled)
aclklog = open_log_file(aclklog_fd, aclklog, aclklog_filename, NULL, 0, &aclklog_fd);
#endif
stdaccess = open_log_file(stdaccess_fd, stdaccess, stdaccess_filename, &access_log_syslog, 1, &stdaccess_fd);
}
// ----------------------------------------------------------------------------
// error log throttling
time_t error_log_throttle_period = 1200;
unsigned long error_log_errors_per_period = 200;
unsigned long error_log_errors_per_period_backup = 0;
int error_log_limit(int reset) {
static time_t start = 0;
static unsigned long counter = 0, prevented = 0;
// fprintf(stderr, "FLOOD: counter=%lu, allowed=%lu, backup=%lu, period=%llu\n", counter, error_log_errors_per_period, error_log_errors_per_period_backup, (unsigned long long)error_log_throttle_period);
// do not throttle if the period is 0
if(error_log_throttle_period == 0)
return 0;
// prevent all logs if the errors per period is 0
if(error_log_errors_per_period == 0)
#ifdef NETDATA_INTERNAL_CHECKS
return 0;
#else
return 1;
#endif
time_t now = now_monotonic_sec();
if(!start) start = now;
if(reset) {
if(prevented) {
char date[LOG_DATE_LENGTH];
log_date(date, LOG_DATE_LENGTH);
fprintf(
stderr,
"%s: %s LOG FLOOD PROTECTION reset for process '%s' "
"(prevented %lu logs in the last %"PRId64" seconds).\n",
date,
program_name,
program_name,
prevented,
(int64_t)(now - start));
}
start = now;
counter = 0;
prevented = 0;
}
// detect if we log too much
counter++;
if(now - start > error_log_throttle_period) {
if(prevented) {
char date[LOG_DATE_LENGTH];
log_date(date, LOG_DATE_LENGTH);
fprintf(
stderr,
"%s: %s LOG FLOOD PROTECTION resuming logging from process '%s' "
"(prevented %lu logs in the last %"PRId64" seconds).\n",
date,
program_name,
program_name,
prevented,
(int64_t)error_log_throttle_period);
}
// restart the period accounting
start = now;
counter = 1;
prevented = 0;
// log this error
return 0;
}
if(counter > error_log_errors_per_period) {
if(!prevented) {
char date[LOG_DATE_LENGTH];
log_date(date, LOG_DATE_LENGTH);
fprintf(
stderr,
"%s: %s LOG FLOOD PROTECTION too many logs (%lu logs in %"PRId64" seconds, threshold is set to %lu logs "
"in %"PRId64" seconds). Preventing more logs from process '%s' for %"PRId64" seconds.\n",
date,
program_name,
counter,
(int64_t)(now - start),
error_log_errors_per_period,
(int64_t)error_log_throttle_period,
program_name,
(int64_t)(start + error_log_throttle_period - now));
}
prevented++;
// prevent logging this error
#ifdef NETDATA_INTERNAL_CHECKS
return 0;
#else
return 1;
#endif
}
return 0;
}
void error_log_limit_reset(void) {
log_lock();
error_log_errors_per_period = error_log_errors_per_period_backup;
error_log_limit(1);
log_unlock();
}
void error_log_limit_unlimited(void) {
log_lock();
error_log_errors_per_period = error_log_errors_per_period_backup;
error_log_limit(1);
error_log_errors_per_period = ((error_log_errors_per_period_backup * 10) < 10000) ? 10000 : (error_log_errors_per_period_backup * 10);
log_unlock();
}
// ----------------------------------------------------------------------------
// debug log
void debug_int( const char *file, const char *function, const unsigned long line, const char *fmt, ... ) {
va_list args;
char date[LOG_DATE_LENGTH];
log_date(date, LOG_DATE_LENGTH);
va_start( args, fmt );
printf("%s: %s DEBUG : %s : (%04lu@%-20.20s:%-15.15s): ", date, program_name, netdata_thread_tag(), line, file, function);
vprintf(fmt, args);
va_end( args );
putchar('\n');
if(output_log_syslog) {
va_start( args, fmt );
vsyslog(LOG_ERR, fmt, args );
va_end( args );
}
fflush(stdout);
}
// ----------------------------------------------------------------------------
// info log
void info_int( const char *file __maybe_unused, const char *function __maybe_unused, const unsigned long line __maybe_unused, const char *fmt, ... )
{
va_list args;
log_lock();
// prevent logging too much
if (error_log_limit(0)) {
log_unlock();
return;
}
if(error_log_syslog) {
va_start( args, fmt );
vsyslog(LOG_INFO, fmt, args );
va_end( args );
}
char date[LOG_DATE_LENGTH];
log_date(date, LOG_DATE_LENGTH);
va_start( args, fmt );
#ifdef NETDATA_INTERNAL_CHECKS
fprintf(stderr, "%s: %s INFO : %s : (%04lu@%-20.20s:%-15.15s): ", date, program_name, netdata_thread_tag(), line, file, function);
#else
fprintf(stderr, "%s: %s INFO : %s : ", date, program_name, netdata_thread_tag());
#endif
vfprintf( stderr, fmt, args );
va_end( args );
fputc('\n', stderr);
log_unlock();
}
// ----------------------------------------------------------------------------
// error log
#if defined(STRERROR_R_CHAR_P)
// GLIBC version of strerror_r
static const char *strerror_result(const char *a, const char *b) { (void)b; return a; }
#elif defined(HAVE_STRERROR_R)
// POSIX version of strerror_r
static const char *strerror_result(int a, const char *b) { (void)a; return b; }
#elif defined(HAVE_C__GENERIC)
// what a trick!
// http://stackoverflow.com/questions/479207/function-overloading-in-c
static const char *strerror_result_int(int a, const char *b) { (void)a; return b; }
static const char *strerror_result_string(const char *a, const char *b) { (void)b; return a; }
#define strerror_result(a, b) _Generic((a), \
int: strerror_result_int, \
char *: strerror_result_string \
)(a, b)
#else
#error "cannot detect the format of function strerror_r()"
#endif
void error_int( const char *prefix, const char *file __maybe_unused, const char *function __maybe_unused, const unsigned long line __maybe_unused, const char *fmt, ... ) {
// save a copy of errno - just in case this function generates a new error
int __errno = errno;
va_list args;
log_lock();
// prevent logging too much
if (error_log_limit(0)) {
log_unlock();
return;
}
if(error_log_syslog) {
va_start( args, fmt );
vsyslog(LOG_ERR, fmt, args );
va_end( args );
}
char date[LOG_DATE_LENGTH];
log_date(date, LOG_DATE_LENGTH);
va_start( args, fmt );
#ifdef NETDATA_INTERNAL_CHECKS
fprintf(stderr, "%s: %s %-5.5s : %s : (%04lu@%-20.20s:%-15.15s): ", date, program_name, prefix, netdata_thread_tag(), line, file, function);
#else
fprintf(stderr, "%s: %s %-5.5s : %s : ", date, program_name, prefix, netdata_thread_tag());
#endif
vfprintf( stderr, fmt, args );
va_end( args );
if(__errno) {
char buf[1024];
fprintf(stderr, " (errno %d, %s)\n", __errno, strerror_result(strerror_r(__errno, buf, 1023), buf));
errno = 0;
}
else
fputc('\n', stderr);
log_unlock();
}
#ifdef NETDATA_INTERNAL_CHECKS
static void crash_netdata(void) {
// make Netdata core dump
abort();
}
#endif
void fatal_int( const char *file, const char *function, const unsigned long line, const char *fmt, ... ) {
// save a copy of errno - just in case this function generates a new error
int __errno = errno;
va_list args;
const char *thread_tag;
char os_threadname[NETDATA_THREAD_NAME_MAX + 1];
if(error_log_syslog) {
va_start( args, fmt );
vsyslog(LOG_CRIT, fmt, args );
va_end( args );
}
thread_tag = netdata_thread_tag();
if (!netdata_thread_tag_exists()) {
os_thread_get_current_name_np(os_threadname);
if ('\0' != os_threadname[0]) { /* If it is not an empty string replace "MAIN" thread_tag */
thread_tag = os_threadname;
}
}
char date[LOG_DATE_LENGTH];
log_date(date, LOG_DATE_LENGTH);
log_lock();
va_start( args, fmt );
#ifdef NETDATA_INTERNAL_CHECKS
fprintf(stderr, "%s: %s FATAL : %s : (%04lu@%-20.20s:%-15.15s): ", date, program_name, thread_tag, line, file, function);
#else
fprintf(stderr, "%s: %s FATAL : %s : ", date, program_name, thread_tag);
#endif
vfprintf( stderr, fmt, args );
va_end( args );
perror(" # ");
fputc('\n', stderr);
log_unlock();
char action_data[70+1];
snprintfz(action_data, 70, "%04lu@%-10.10s:%-15.15s/%d", line, file, function, __errno);
char action_result[60+1];
snprintfz(action_result, 60, "%s:%s", program_name, strncmp(thread_tag, "STREAM_RECEIVER", strlen("STREAM_RECEIVER")) ? thread_tag : "[x]");
send_statistics("FATAL", action_result, action_data);
#ifdef NETDATA_INTERNAL_CHECKS
crash_netdata();
#endif
netdata_cleanup_and_exit(1);
}
// ----------------------------------------------------------------------------
// access log
void log_access( const char *fmt, ... ) {
va_list args;
if(access_log_syslog) {
va_start( args, fmt );
vsyslog(LOG_INFO, fmt, args );
va_end( args );
}
if(stdaccess) {
static netdata_mutex_t access_mutex = NETDATA_MUTEX_INITIALIZER;
if(web_server_is_multithreaded)
netdata_mutex_lock(&access_mutex);
char date[LOG_DATE_LENGTH];
log_date(date, LOG_DATE_LENGTH);
fprintf(stdaccess, "%s: ", date);
va_start( args, fmt );
vfprintf( stdaccess, fmt, args );
va_end( args );
fputc('\n', stdaccess);
if(web_server_is_multithreaded)
netdata_mutex_unlock(&access_mutex);
}
}
#ifdef ENABLE_ACLK
void log_aclk_message_bin( const char *data, const size_t data_len, int tx, const char *mqtt_topic, const char *message_name) {
if (aclklog) {
static netdata_mutex_t aclklog_mutex = NETDATA_MUTEX_INITIALIZER;
netdata_mutex_lock(&aclklog_mutex);
char date[LOG_DATE_LENGTH];
log_date(date, LOG_DATE_LENGTH);
fprintf(aclklog, "%s: %s Msg:\"%s\", MQTT-topic:\"%s\": ", date, tx ? "OUTGOING" : "INCOMING", message_name, mqtt_topic);
fwrite(data, data_len, 1, aclklog);
fputc('\n', aclklog);
netdata_mutex_unlock(&aclklog_mutex);
}
}
#endif
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