/*      $NetBSD: t_open_pr_57260.c,v 1.2 2023/04/23 00:46:46 gutteridge Exp $   */

/*-
* Copyright (c) 2023 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Taylor R. Campbell and David H. Gutteridge.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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/cdefs.h>
__RCSID("$NetBSD: t_open_pr_57260.c,v 1.2 2023/04/23 00:46:46 gutteridge Exp $");

#include <sys/stat.h>

#include <fcntl.h>
#include <setjmp.h>
#include <signal.h>
#include <unistd.h>

#include <atf-c.h>
#include "h_macros.h"

static jmp_buf env;
static sig_atomic_t alarmed = 0;

static void
on_alarm(int sig)
{

       if (!alarmed) {
               alarmed = 1;
               alarm(1);
       } else {
               longjmp(env, 1);
       }
}

ATF_TC(openrestartsignal);
ATF_TC_HEAD(openrestartsignal, tc)
{

       atf_tc_set_md_var(tc, "descr", "open(2) should restart on signal "
           "(PR kern/57260)");
}

ATF_TC_BODY(openrestartsignal, tc)
{
       struct sigaction sa;
       int fd;

       memset(&sa, 0, sizeof(sa));
       sa.sa_handler = on_alarm;
       (void)sigfillset(&sa.sa_mask);
       sa.sa_flags = SA_RESTART;
       if (sigaction(SIGALRM, &sa, NULL) == -1)
               atf_tc_fail_errno("sigaction");

       if (mkfifo("fifo", 0600) == -1)
               atf_tc_fail_errno("mkfifo");
       alarm(1);
       if (setjmp(env))
               /* second signal handler longjmped out */
               return;
       fd = open("fifo", O_RDONLY);
       if (fd == -1)
               atf_tc_fail_errno("open");
       atf_tc_fail("open returned %d", fd);
}

ATF_TP_ADD_TCS(tp)
{

       ATF_TP_ADD_TC(tp, openrestartsignal);

       return atf_no_error();
}