varnish-cache/lib/libvarnish/vas.c
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/*-
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 * Copyright (c) 2006 Verdens Gang AS
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 * Copyright (c) 2006-2016 Varnish Software AS
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 * All rights reserved.
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 *
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 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
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 *
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 * SPDX-License-Identifier: BSD-2-Clause
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 * This is the default backend function for libvarnish' assert facilities.
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 */
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "vdef.h"
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#include "vas.h"
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const char *
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VAS_errtxt(int e)
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{
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        const char *p;
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        int oerrno = errno;
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        p = strerror(e);
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        if (p != NULL)
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                return (p);
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        errno = oerrno;
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        return ("strerror(3) returned NULL");
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}
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vas_f *VAS_Fail_Func v_noreturn_;
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void v_noreturn_
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VAS_Fail(const char *func, const char *file, int line,
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    const char *cond, enum vas_e kind)
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{
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        int err = errno;
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        if (VAS_Fail_Func != NULL) {
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                VAS_Fail_Func(func, file, line, cond, kind);
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        } else {
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                if (kind == VAS_MISSING) {
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                        fprintf(stderr,
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                            "Missing error handling code in %s(), %s line %d:\n"
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                            "  Condition(%s) not true.\n",
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                            func, file, line, cond);
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                } else if (kind == VAS_INCOMPLETE) {
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                        fprintf(stderr,
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                            "Incomplete code in %s(), %s line %d:\n",
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                            func, file, line);
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                } else if (kind == VAS_WRONG) {
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                        fprintf(stderr,
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                            "Wrong turn in %s(), %s line %d: %s\n",
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                            func, file, line, cond);
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                } else {
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                        fprintf(stderr,
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                            "Assert error in %s(), %s line %d:\n"
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                            "  Condition(%s) not true.\n",
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                            func, file, line, cond);
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                }
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                if (err)
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                        fprintf(stderr,
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                            "  errno = %d (%s)\n", err, strerror(err));
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        }
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        abort();
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}