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/*
* log.c - Logging methods
* Copyright (C) 2ndQuadrant, 2010-2011
*
* This module is a set of methods for logging (currently only syslog)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "repmgr.h"
#include <stdlib.h>
#ifdef HAVE_SYSLOG
#include <syslog.h>
#include <stdarg.h>
#endif
#include "log.h"
#define DEFAULT_IDENT "repmgr"
#ifdef HAVE_SYSLOG
#define DEFAULT_SYSLOG_FACILITY LOG_LOCAL0
#endif
/* #define REPMGR_DEBUG */
static int detect_log_level(const char* level);
static int detect_log_facility(const char* facility);
int log_type = REPMGR_STDERR;
int log_level = LOG_NOTICE;
bool logger_init(const char* ident, const char* level, const char* facility)
{
int l;
int f;
#ifdef HAVE_SYSLOG
int syslog_facility = DEFAULT_SYSLOG_FACILITY;
#endif
#ifdef REPMGR_DEBUG
printf("Logger initialisation (Level: %s, Facility: %s)\n", level, facility);
#endif
if (!ident)
{
ident = DEFAULT_IDENT;
}
if (level && *level)
{
l = detect_log_level(level);
#ifdef REPMGR_DEBUG
printf("Assigned level for logger: %d\n", l);
#endif
if (l > 0)
log_level = l;
else
stderr_log_warning(_("Cannot detect log level %s (use any of DEBUG, INFO, NOTICE, WARNING, ERR, ALERT, CRIT or EMERG)\n"), level);
}
if (facility && *facility)
{
f = detect_log_facility(facility);
#ifdef REPMGR_DEBUG
printf("Assigned facility for logger: %d\n", f);
#endif
if (f == 0)
{
/* No syslog requested, just stderr */
#ifdef REPMGR_DEBUG
printf(_("Use stderr for logging\n"));
#endif
}
else if (f == -1)
{
stderr_log_warning(_("Cannot detect log facility %s (use any of LOCAL0, LOCAL1, ..., LOCAL7, USER or STDERR)\n"), facility);
}
#ifdef HAVE_SYSLOG
else
{
syslog_facility = f;
log_type = REPMGR_SYSLOG;
}
#endif
}
#ifdef HAVE_SYSLOG
if (log_type == REPMGR_SYSLOG)
{
setlogmask (LOG_UPTO (log_level));
openlog (ident, LOG_CONS | LOG_PID | LOG_NDELAY, syslog_facility);
stderr_log_notice(_("Setup syslog (level: %s, facility: %s)\n"), level, facility);
}
#endif
return true;
}
bool logger_shutdown(void)
{
#ifdef HAVE_SYSLOG
if (log_type == REPMGR_SYSLOG)
closelog();
#endif
return true;
}
/*
* Set a minimum logging level. Intended for command line verbosity
* options, which might increase requested logging over what's specified
* in the regular configuration file.
*/
void logger_min_verbose(int minimum)
{
if (log_level < minimum)
log_level = minimum;
}
int detect_log_level(const char* level)
{
if (!strcmp(level, "DEBUG"))
return LOG_DEBUG;
if (!strcmp(level, "INFO"))
return LOG_INFO;
if (!strcmp(level, "NOTICE"))
return LOG_NOTICE;
if (!strcmp(level, "WARNING"))
return LOG_WARNING;
if (!strcmp(level, "ERR"))
return LOG_ERR;
if (!strcmp(level, "ALERT"))
return LOG_ALERT;
if (!strcmp(level, "CRIT"))
return LOG_CRIT;
if (!strcmp(level, "EMERG"))
return LOG_EMERG;
return 0;
}
int detect_log_facility(const char* facility)
{
int local = 0;
if (!strncmp(facility, "LOCAL", 5) && strlen(facility) == 6)
{
local = atoi (&facility[5]);
switch (local)
{
case 0:
return LOG_LOCAL0;
break;
case 1:
return LOG_LOCAL1;
break;
case 2:
return LOG_LOCAL2;
break;
case 3:
return LOG_LOCAL3;
break;
case 4:
return LOG_LOCAL4;
break;
case 5:
return LOG_LOCAL5;
break;
case 6:
return LOG_LOCAL6;
break;
case 7:
return LOG_LOCAL7;
break;
}
}
else if (!strcmp(facility, "USER"))
{
return LOG_USER;
}
else if (!strcmp(facility, "STDERR"))
{
return 0;
}
return -1;
}
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