/*      $OpenBSD: jmptest.c,v 1.7 2003/09/02 23:52:16 david Exp $       */
/*      $NetBSD: jmptest.c,v 1.2 1995/01/01 20:55:35 jtc Exp $  */

/*
 * Copyright (c) 1994 Christopher G. Demetriou
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Christopher G. Demetriou
 *      for the NetBSD Project.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>
#include <err.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#if (TEST_SETJMP + TEST_U_SETJMP + TEST_SIGSETJMP) != 1
#error one of TEST_SETJMP, TEST_U_SETJMP, or TEST_SIGSETJMP must be defined
#endif

#ifdef TEST_SETJMP
#define BUF             jmp_buf
#define SET(b, m)       setjmp(b)
#define JMP(b, v)       longjmp(b, v)
#endif

#ifdef TEST_U_SETJMP
#define BUF             jmp_buf
#define SET(b, m)       _setjmp(b)
#define JMP(b, v)       _longjmp(b, v)
#endif

#ifdef TEST_SIGSETJMP
#define BUF             sigjmp_buf
#define SET(b, m)       sigsetjmp(b, m)
#define JMP(b, v)       siglongjmp(b, v)
#endif

int expectsignal;

static void
aborthandler(int signo)
{

        if (expectsignal)
                _exit(0);
        else {
                warnx("kill(SIGABRT) succeeded");
                _exit(1);
        }
}

int
main(int argc, char *argv[])
{
        struct sigaction sa;
        BUF jb;
        sigset_t ss;
        int i, x;

        i = getpid();

#ifdef TEST_SETJMP
        expectsignal = 0;
#endif
#ifdef TEST_U_SETJMP
        expectsignal = 1;
#endif
#ifdef TEST_SIGSETJMP
        if (argc != 2 ||
            (strcmp(argv[1], "save") && strcmp(argv[1], "nosave"))) {
                fprintf(stderr, "usage: %s [save|nosave]\n", argv[0]);
                exit(1);
        }
        expectsignal = (strcmp(argv[1], "save") != 0);
#endif

        sa.sa_handler = aborthandler;
        sigemptyset(&sa.sa_mask);
        sa.sa_flags = 0;
        if (sigaction(SIGABRT, &sa, NULL) == -1)
                err(1, "sigaction failed");

        if (sigemptyset(&ss) == -1)
                err(1, "sigemptyset failed");
        if (sigaddset(&ss, SIGABRT) == -1)
                err(1, "sigaddset failed");
        if (sigprocmask(SIG_BLOCK, &ss, NULL) == -1)
                err(1, "sigprocmask (1) failed");

        x = SET(jb, !expectsignal);
        if (x != 0) {
                if (x != i)
                        errx(1, "setjmp returned wrong value");

                kill(i, SIGABRT);
                if (expectsignal)
                        errx(1, "kill(SIGABRT) failed");
                else
                        exit(0);
        }

        if (sigprocmask(SIG_UNBLOCK, &ss, NULL) == -1)
                err(1, "sigprocmask (2) failed");

        JMP(jb, i);

        errx(1, "jmp failed");
}