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/*
FUSE: Filesystem in Userspace
Copyright (C) 2019 Red Hat, Inc.
Logging API.
This program can be distributed under the terms of the GNU LGPLv2.
See the file COPYING.LIB
*/
#include "fuse_log.h"
#include <stdarg.h>
#include <stdio.h>
#include <stdbool.h>
#include <syslog.h>
#define MAX_SYSLOG_LINE_LEN 512
static bool to_syslog = false;
static void default_log_func(__attribute__((unused)) enum fuse_log_level level,
const char *fmt, va_list ap)
{
if (to_syslog) {
int sys_log_level = LOG_ERR;
/*
* with glibc fuse_log_level has identical values as
* syslog levels, but we also support BSD - better we convert to
* be sure.
*/
switch (level) {
case FUSE_LOG_DEBUG:
sys_log_level = LOG_DEBUG;
break;
case FUSE_LOG_INFO:
sys_log_level = LOG_INFO;
break;
case FUSE_LOG_NOTICE:
sys_log_level = LOG_NOTICE;
break;
case FUSE_LOG_WARNING:
sys_log_level = LOG_WARNING;
break;
case FUSE_LOG_ERR:
sys_log_level = LOG_ERR;
break;
case FUSE_LOG_CRIT:
sys_log_level = LOG_CRIT;
break;
case FUSE_LOG_ALERT:
sys_log_level = LOG_ALERT;
break;
case FUSE_LOG_EMERG:
sys_log_level = LOG_EMERG;
}
char log[MAX_SYSLOG_LINE_LEN];
vsnprintf(log, MAX_SYSLOG_LINE_LEN, fmt, ap);
syslog(sys_log_level, "%s", log);
} else {
vfprintf(stderr, fmt, ap);
}
}
static fuse_log_func_t log_func = default_log_func;
void fuse_set_log_func(fuse_log_func_t func)
{
if (!func)
func = default_log_func;
log_func = func;
}
void fuse_log(enum fuse_log_level level, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
log_func(level, fmt, ap);
va_end(ap);
}
void fuse_log_enable_syslog(const char *ident, int option, int facility)
{
to_syslog = true;
openlog(ident, option, facility);
}
void fuse_log_close_syslog(void)
{
closelog();
}
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