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/* $OpenBSD: errwarn.c,v 1.18 2012/11/15 14:54:18 krw Exp $ */
/* Errors and warnings... */
/*
* Copyright (c) 1996 The Internet Software Consortium.
* All Rights Reserved.
* Copyright (c) 1995 RadioMail Corporation. 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 RadioMail Corporation, the Internet Software
* Consortium 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 RADIOMAIL CORPORATION, THE INTERNET
* SOFTWARE CONSORTIUM 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 RADIOMAIL CORPORATION 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.
*
* This software was written for RadioMail Corporation by Ted Lemon
* under a contract with Vixie Enterprises. Further modifications have
* been made for the Internet Software Consortium under a contract
* with Vixie Laboratories.
*/
#include "dhcpd.h"
#include <sys/uio.h>
static void do_percentm(char *obuf, size_t size, char *ibuf);
static char mbuf[1024];
static char fbuf[1024];
int warnings_occurred;
/*
* Log an error message, then exit.
*/
void
error(char *fmt, ...)
{
va_list list;
do_percentm(fbuf, sizeof(fbuf), fmt);
va_start(list, fmt);
vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
va_end(list);
#ifndef DEBUG
syslog(LOG_ERR, "%s", mbuf);
#endif
/* Also log it to stderr? */
if (log_perror) {
write(STDERR_FILENO, mbuf, strlen(mbuf));
write(STDERR_FILENO, "\n", 1);
}
if (log_perror) {
fflush(stderr);
}
exit(1);
}
/*
* Log a warning message...
*/
int
warning(char *fmt, ...)
{
va_list list;
do_percentm(fbuf, sizeof(fbuf), fmt);
va_start(list, fmt);
vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
va_end(list);
#ifndef DEBUG
syslog(LOG_ERR, "%s", mbuf);
#endif
if (log_perror) {
write(STDERR_FILENO, mbuf, strlen(mbuf));
write(STDERR_FILENO, "\n", 1);
}
return (0);
}
/*
* Log a note...
*/
int
note(char *fmt, ...)
{
va_list list;
do_percentm(fbuf, sizeof(fbuf), fmt);
va_start(list, fmt);
vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
va_end(list);
#ifndef DEBUG
syslog(LOG_INFO, "%s", mbuf);
#endif
if (log_perror) {
write(STDERR_FILENO, mbuf, strlen(mbuf));
write(STDERR_FILENO, "\n", 1);
}
return (0);
}
#ifdef DEBUG
/*
* Log a debug message...
*/
int
debug(char *fmt, ...)
{
va_list list;
do_percentm(fbuf, sizeof(fbuf), fmt);
va_start(list, fmt);
vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
va_end(list);
syslog(LOG_DEBUG, "%s", mbuf);
if (log_perror) {
write(STDERR_FILENO, mbuf, strlen(mbuf));
write(STDERR_FILENO, "\n", 1);
}
return (0);
}
#endif
/*
* Find %m in the input string and substitute an error message string.
*/
static void
do_percentm(char *obuf, size_t size, char *ibuf)
{
char ch;
char *s = ibuf;
char *t = obuf;
int prlen;
size_t fmt_left;
int saved_errno = errno;
/*
* We wouldn't need this mess if printf handled %m, or if
* strerror() had been invented before syslog().
*/
for (fmt_left = size; (ch = *s); ++s) {
if (ch == '%' && s[1] == 'm') {
++s;
prlen = snprintf(t, fmt_left, "%s",
strerror(saved_errno));
if (prlen == -1)
prlen = 0;
else if (prlen >= fmt_left)
prlen = fmt_left - 1;
t += prlen;
fmt_left -= prlen;
} else {
if (fmt_left > 1) {
*t++ = ch;
fmt_left--;
}
}
}
*t = '\0';
}
int
parse_warn(char *fmt, ...)
{
va_list list;
static char spaces[] =
" "
" "; /* 80 spaces */
struct iovec iov[6];
size_t iovcnt;
do_percentm(mbuf, sizeof(mbuf), fmt);
snprintf(fbuf, sizeof(fbuf), "%s line %d: %s", tlname, lexline, mbuf);
va_start(list, fmt);
vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
va_end(list);
#ifndef DEBUG
syslog(LOG_ERR, "%s", mbuf);
syslog(LOG_ERR, "%s", token_line);
if (lexchar < 81)
syslog(LOG_ERR, "%*c", lexchar, '^');
#endif
if (log_perror) {
iov[0].iov_base = mbuf;
iov[0].iov_len = strlen(mbuf);
iov[1].iov_base = "\n";
iov[1].iov_len = 1;
iov[2].iov_base = token_line;
iov[2].iov_len = strlen(token_line);
iov[3].iov_base = "\n";
iov[3].iov_len = 1;
iovcnt = 4;
if (lexchar < 81) {
iov[4].iov_base = spaces;
iov[4].iov_len = lexchar - 1;
iov[5].iov_base = "^\n";
iov[5].iov_len = 2;
iovcnt += 2;
}
writev(STDERR_FILENO, iov, iovcnt);
}
warnings_occurred = 1;
return (0);
}
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