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/* $NetBSD: diag.c,v 1.10 2012/03/22 22:58:15 joerg Exp $ */
/*
* Routines to report various classes of problems. Each report is decorated
* with the current context (file name and line number), if available.
*
* tcpd_warn() reports a problem and proceeds.
*
* tcpd_jump() reports a problem and jumps.
*
* Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#) diag.c 1.1 94/12/28 17:42:20";
#else
__RCSID("$NetBSD: diag.c,v 1.10 2012/03/22 22:58:15 joerg Exp $");
#endif
#endif
/* System libraries */
#include <syslog.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <setjmp.h>
#include <string.h>
#include <errno.h>
/* Local stuff */
#include "tcpd.h"
struct tcpd_context tcpd_context;
jmp_buf tcpd_buf;
static void tcpd_diag(int, const char *, const char *, va_list)
__printflike(3,0);
/* tcpd_diag - centralize error reporter */
static void
tcpd_diag(int severity, const char *tag, const char *fmt, va_list ap)
{
char *buf;
int oerrno;
/* save errno in case we need it */
oerrno = errno;
if (vasprintf(&buf, fmt, ap) == -1)
buf = __UNCONST(fmt);
errno = oerrno;
/* contruct the tag for the log entry */
if (tcpd_context.file)
syslog(severity, "%s: %s, line %d: %s",
tag, tcpd_context.file, tcpd_context.line, buf);
else
syslog(severity, "%s: %s", tag, buf);
if (buf != fmt)
free(buf);
}
/* tcpd_warn - report problem of some sort and proceed */
void
tcpd_warn(const char *format, ...)
{
va_list ap;
va_start(ap, format);
tcpd_diag(LOG_ERR, "warning", format, ap);
va_end(ap);
}
/* tcpd_jump - report serious problem and jump */
void
tcpd_jump(const char *format, ...)
{
va_list ap;
va_start(ap, format);
tcpd_diag(LOG_ERR, "error", format, ap);
va_end(ap);
longjmp(tcpd_buf, AC_ERROR);
}
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