107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/* $NetBSD: diag.c,v 1.7 2001/09/24 17:55:47 atatat Exp $ */
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/*
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* Routines to report various classes of problems. Each report is decorated
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* with the current context (file name and line number), if available.
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*
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* tcpd_warn() reports a problem and proceeds.
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*
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* tcpd_jump() reports a problem and jumps.
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*
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* Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#) diag.c 1.1 94/12/28 17:42:20";
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#else
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__RCSID("$NetBSD: diag.c,v 1.7 2001/09/24 17:55:47 atatat Exp $");
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#endif
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#endif
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/* System libraries */
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#include <syslog.h>
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#include <stdio.h>
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#include <setjmp.h>
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#include <string.h>
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#include <errno.h>
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/* Local stuff */
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#include "tcpd.h"
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#include "mystdarg.h"
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struct tcpd_context tcpd_context;
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jmp_buf tcpd_buf;
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static void tcpd_diag __P((int, char *, char *, va_list))
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__attribute__((__format__(__printf__, 3, 0)));
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/* tcpd_diag - centralize error reporter */
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static void tcpd_diag(severity, tag, format, ap)
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int severity;
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char *tag;
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char *format;
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va_list ap;
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{
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char fmt[BUFSIZ];
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char buf[BUFSIZ];
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int i, o, oerrno;
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/* save errno in case we need it */
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oerrno = errno;
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/* contruct the tag for the log entry */
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if (tcpd_context.file)
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(void)snprintf(buf, sizeof buf, "%s: %s, line %d: ",
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tag, tcpd_context.file, tcpd_context.line);
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else
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(void)snprintf(buf, sizeof buf, "%s: ", tag);
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/* change % to %% in tag before appending the format */
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for (i = 0, o = 0; buf[i] != '\0'; ) {
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if (buf[i] == '%') {
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fmt[o] = '%';
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if (o < sizeof(fmt) - 1)
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o++;
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}
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fmt[o] = buf[i++];
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if (o < sizeof(fmt) - 1)
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o++;
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}
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/* append format and force null termination */
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fmt[o] = '\0';
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strncat(fmt, format, sizeof(fmt) - o);
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fmt[sizeof(fmt) - 1] = '\0';
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errno = oerrno;
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vsyslog(severity, fmt, ap);
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}
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/* tcpd_warn - report problem of some sort and proceed */
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void VARARGS(tcpd_warn, char *, format)
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{
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va_list ap;
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VASTART(ap, char *, format);
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tcpd_diag(LOG_ERR, "warning", format, ap);
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VAEND(ap);
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}
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/* tcpd_jump - report serious problem and jump */
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void VARARGS(tcpd_jump, char *, format)
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{
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va_list ap;
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VASTART(ap, char *, format);
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tcpd_diag(LOG_ERR, "error", format, ap);
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VAEND(ap);
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longjmp(tcpd_buf, AC_ERROR);
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}
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