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/*
* Syslog logging.
*
* Functions to log informational and warning messages through syslog. There
* are cases, such as when we queue changes, where we want to log the reason
* but return success to kadmind or kpasswdd, which means that they won't log
* anything. In those cases, we log directly to syslog unless the syslog
* configuration option is set to false.
*
* Written by Russ Allbery <eagle@eyrie.org>
* Copyright 2015 Russ Allbery <eagle@eyrie.org>
* Copyright 2013
* The Board of Trustees of the Leland Stanford Junior University
*
* See LICENSE for licensing terms.
*/
#include <config.h>
#include <portable/system.h>
#include <syslog.h>
#include <plugin/internal.h>
/*
* Log a message to syslog. This is a helper function used to implement all
* of the syslog logging functions. If we can't allocate memory for the
* message to log, we just do nothing, since these functions are only used for
* supplemental logging.
*/
static void __attribute__((__format__(printf, 3, 0)))
log_syslog(kadm5_hook_modinfo *config, int priority, const char *fmt,
va_list args)
{
char *message;
int status;
/* If configured not to log, do nothing. */
if (!config->syslog)
return;
/* Log the message. */
status = vasprintf(&message, fmt, args);
if (status < 0)
return;
syslog(priority, "%s", message);
free(message);
}
/*
* Generate the functions for the various priority levels we use.
*/
#define SYSLOG_FUNCTION(name, type) \
void \
sync_syslog_ ## name(kadm5_hook_modinfo *c, const char *f, ...) \
{ \
va_list args; \
va_start(args, f); \
log_syslog(c, LOG_ ## type, f, args); \
va_end(args); \
}
SYSLOG_FUNCTION(debug, DEBUG)
SYSLOG_FUNCTION(info, INFO)
SYSLOG_FUNCTION(notice, NOTICE)
SYSLOG_FUNCTION(warning, WARNING)
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