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/*
* Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* 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.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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 <config.h>
#ifndef HAVE_VSYSLOG
#include <stdio.h>
#include <syslog.h>
#include <stdarg.h>
#include "roken.h"
/*
* the theory behind this is that we might be trying to call vsyslog
* when there's no memory left, and we should try to be as useful as
* possible. And the format string should say something about what's
* failing.
*/
static void
simple_vsyslog(int pri, const char *fmt, va_list ap)
{
syslog (pri, "%s", fmt);
}
/*
* do like syslog but with a `va_list'
*/
ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
vsyslog(int pri, const char *fmt, va_list ap)
{
char *fmt2;
const char *p;
char *p2;
int ret;
int saved_errno = errno;
int fmt_len = strlen (fmt);
int fmt2_len = fmt_len;
char *buf;
fmt2 = malloc (fmt_len + 1);
if (fmt2 == NULL) {
simple_vsyslog (pri, fmt, ap);
return;
}
for (p = fmt, p2 = fmt2; *p != '\0'; ++p) {
if (p[0] == '%' && p[1] == 'm') {
const char *e = strerror (saved_errno);
int e_len = strlen (e);
char *tmp;
int pos;
pos = p2 - fmt2;
fmt2_len += e_len - 2;
tmp = realloc (fmt2, fmt2_len + 1);
if (tmp == NULL) {
free (fmt2);
simple_vsyslog (pri, fmt, ap);
return;
}
fmt2 = tmp;
p2 = fmt2 + pos;
memmove (p2, e, e_len);
p2 += e_len;
++p;
} else
*p2++ = *p;
}
*p2 = '\0';
ret = vasprintf (&buf, fmt2, ap);
free (fmt2);
if (ret < 0 || buf == NULL) {
simple_vsyslog (pri, fmt, ap);
return;
}
syslog (pri, "%s", buf);
free (buf);
}
#endif
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