/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2012 The FreeBSD Foundation
*
* This software was developed by Edward Tomasz Napierala under sponsorship
* from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <vis.h>
#include "common.h"
static int log_level = 0;
static char *peer_name = NULL;
static char *peer_addr = NULL;
#define MSGBUF_LEN 1024
void
log_init(int level)
{
log_level = level;
openlog(getprogname(), LOG_NDELAY | LOG_PID, LOG_DAEMON);
}
void
log_set_peer_name(const char *name)
{
/*
* XXX: Turn it into assertion?
*/
if (peer_name != NULL)
log_errx(1, "%s called twice", __func__);
if (peer_addr == NULL)
log_errx(1, "%s called before log_set_peer_addr", __func__);
peer_name = checked_strdup(name);
}
void
log_set_peer_addr(const char *addr)
{
/*
* XXX: Turn it into assertion?
*/
if (peer_addr != NULL)
log_errx(1, "%s called twice", __func__);
peer_addr = checked_strdup(addr);
}
static void
log_common(int priority, int log_errno, const char *fmt, va_list ap)
{
static char msgbuf[MSGBUF_LEN];
static char msgbuf_strvised[MSGBUF_LEN * 4 + 1];
char *errstr;
int ret;
ret = vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap);
if (ret < 0) {
fprintf(stderr, "%s: snprintf failed", getprogname());
syslog(LOG_CRIT, "snprintf failed");
exit(1);
}
ret = strnvis(msgbuf_strvised, sizeof(msgbuf_strvised), msgbuf, VIS_NL);
if (ret < 0) {
fprintf(stderr, "%s: strnvis failed", getprogname());
syslog(LOG_CRIT, "strnvis failed");
exit(1);
}
if (log_errno == -1) {
if (peer_name != NULL) {
fprintf(stderr, "%s: %s (%s): %s\n", getprogname(),
peer_addr, peer_name, msgbuf_strvised);
syslog(priority, "%s (%s): %s",
peer_addr, peer_name, msgbuf_strvised);
} else if (peer_addr != NULL) {
fprintf(stderr, "%s: %s: %s\n", getprogname(),
peer_addr, msgbuf_strvised);
syslog(priority, "%s: %s",
peer_addr, msgbuf_strvised);
} else {
fprintf(stderr, "%s: %s\n", getprogname(), msgbuf_strvised);
syslog(priority, "%s", msgbuf_strvised);
}
} else {
errstr = strerror(log_errno);
if (peer_name != NULL) {
fprintf(stderr, "%s: %s (%s): %s: %s\n", getprogname(),
peer_addr, peer_name, msgbuf_strvised, errstr);
syslog(priority, "%s (%s): %s: %s",
peer_addr, peer_name, msgbuf_strvised, errstr);
} else if (peer_addr != NULL) {
fprintf(stderr, "%s: %s: %s: %s\n", getprogname(),
peer_addr, msgbuf_strvised, errstr);
syslog(priority, "%s: %s: %s",
peer_addr, msgbuf_strvised, errstr);
} else {
fprintf(stderr, "%s: %s: %s\n", getprogname(),
msgbuf_strvised, errstr);
syslog(priority, "%s: %s",
msgbuf_strvised, errstr);
}
}
}
void
log_err(int eval, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
log_common(LOG_CRIT, errno, fmt, ap);
va_end(ap);
exit(eval);
}
void
log_errx(int eval, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
log_common(LOG_CRIT, -1, fmt, ap);
va_end(ap);
exit(eval);
}
void
log_warn(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
log_common(LOG_WARNING, errno, fmt, ap);
va_end(ap);
}
void
log_warnx(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
log_common(LOG_WARNING, -1, fmt, ap);
va_end(ap);
}
void
log_debugx(const char *fmt, ...)
{
va_list ap;
if (log_level == 0)
return;
va_start(ap, fmt);
log_common(LOG_DEBUG, -1, fmt, ap);
va_end(ap);
}
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