90 lines
1.9 KiB
C
90 lines
1.9 KiB
C
/* $NetBSD: diag.c,v 1.18 2024/02/09 22:08:31 andvar 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 1.18 2024/02/09 22:08:31 andvar 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 <stdarg.h>
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#include <stdio.h>
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#include <stdlib.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 "expandm.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(int, const char *, const char *, va_list)
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__sysloglike(3,0);
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/* tcpd_diag - centralize error reporter */
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static void
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tcpd_diag(int severity, const char *tag, const char *fmt, va_list ap)
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{
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char *buf, *bufx;
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if (vasprintf(&buf, expandm(fmt, NULL, &bufx), ap) == -1)
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buf = __UNCONST(fmt);
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free(bufx);
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/* construct the tag for the log entry */
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if (tcpd_context.file)
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syslog(severity, "%s: %s, line %d: %s",
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tag, tcpd_context.file, tcpd_context.line, buf);
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else
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syslog(severity, "%s: %s", tag, buf);
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if (buf != fmt)
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free(buf);
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}
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/* tcpd_warn - report problem of some sort and proceed */
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void
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tcpd_warn(const char *format, ...)
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{
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va_list ap;
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va_start(ap, format);
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tcpd_diag(LOG_ERR, "warning", format, ap);
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va_end(ap);
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}
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/* tcpd_jump - report serious problem and jump */
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void
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tcpd_jump(const char *format, ...)
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{
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va_list ap;
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va_start(ap, format);
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tcpd_diag(LOG_ERR, "error", format, ap);
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va_end(ap);
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longjmp(tcpd_buf, AC_ERROR);
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}
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