lib/isc/error.c

/*
 * Copyright (C) 1998-2001, 2004, 2005, 2007, 2015, 2016  Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

/* $Id: error.c,v 1.21 2007/06/19 23:47:17 tbox Exp $ */

/*! \file */

#include <config.h>

#include <stdio.h>
#include <stdlib.h>

#include <isc/error.h>
#include <isc/msgs.h>
#include <isc/print.h>

/*% Default unexpected callback. */
static void
default_unexpected_callback(const char *, int, const char *, va_list)
     ISC_FORMAT_PRINTF(3, 0);

/*% Default fatal callback. */
static void
default_fatal_callback(const char *, int, const char *, va_list)
     ISC_FORMAT_PRINTF(3, 0);

/*% unexpected_callback */
static isc_errorcallback_t unexpected_callback = default_unexpected_callback;
static isc_errorcallback_t fatal_callback = default_fatal_callback;

void
isc_error_setunexpected(isc_errorcallback_t cb) {
    if (cb == NULL)
        unexpected_callback = default_unexpected_callback;
    else
        unexpected_callback = cb;
}

void
isc_error_setfatal(isc_errorcallback_t cb) {
    if (cb == NULL)
        fatal_callback = default_fatal_callback;
    else
        fatal_callback = cb;
}

void
isc_error_unexpected(const char *file, int line, const char *format, ...) {
    va_list args;

    va_start(args, format);
    (unexpected_callback)(file, line, format, args);
    va_end(args);
}

void
isc_error_fatal(const char *file, int line, const char *format, ...) {
    va_list args;

    va_start(args, format);
    (fatal_callback)(file, line, format, args);
    va_end(args);
    abort();
}

void
isc_error_runtimecheck(const char *file, int line, const char *expression) {
    isc_error_fatal(file, line, "RUNTIME_CHECK(%s) %s", expression,
            isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
                       ISC_MSG_FAILED, "failed"));
}

static void
default_unexpected_callback(const char *file, int line, const char *format,
                va_list args)
{
    fprintf(stderr, "%s:%d: ", file, line);
    vfprintf(stderr, format, args);
    fprintf(stderr, "\n");
    fflush(stderr);
}

static void
default_fatal_callback(const char *file, int line, const char *format,
               va_list args)
{
    fprintf(stderr, "%s:%d: %s: ", file, line,
        isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
                   ISC_MSG_FATALERROR, "fatal error"));
    vfprintf(stderr, format, args);
    fprintf(stderr, "\n");
    fflush(stderr);
}