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      1 /*	$NetBSD: t_open_pr_57260.c,v 1.2 2023/04/23 00:46:46 gutteridge Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2023 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell and David H. Gutteridge.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __RCSID("$NetBSD: t_open_pr_57260.c,v 1.2 2023/04/23 00:46:46 gutteridge Exp $");
     34 
     35 #include <sys/stat.h>
     36 
     37 #include <fcntl.h>
     38 #include <setjmp.h>
     39 #include <signal.h>
     40 #include <unistd.h>
     41 
     42 #include <atf-c.h>
     43 #include "h_macros.h"
     44 
     45 static jmp_buf env;
     46 static sig_atomic_t alarmed = 0;
     47 
     48 static void
     49 on_alarm(int sig)
     50 {
     51 
     52 	if (!alarmed) {
     53 		alarmed = 1;
     54 		alarm(1);
     55 	} else {
     56 		longjmp(env, 1);
     57 	}
     58 }
     59 
     60 ATF_TC(openrestartsignal);
     61 ATF_TC_HEAD(openrestartsignal, tc)
     62 {
     63 
     64 	atf_tc_set_md_var(tc, "descr", "open(2) should restart on signal "
     65 	    "(PR kern/57260)");
     66 }
     67 
     68 ATF_TC_BODY(openrestartsignal, tc)
     69 {
     70 	struct sigaction sa;
     71 	int fd;
     72 
     73 	memset(&sa, 0, sizeof(sa));
     74 	sa.sa_handler = on_alarm;
     75 	(void)sigfillset(&sa.sa_mask);
     76 	sa.sa_flags = SA_RESTART;
     77 	if (sigaction(SIGALRM, &sa, NULL) == -1)
     78 		atf_tc_fail_errno("sigaction");
     79 
     80 	if (mkfifo("fifo", 0600) == -1)
     81 		atf_tc_fail_errno("mkfifo");
     82 	alarm(1);
     83 	if (setjmp(env))
     84 		/* second signal handler longjmped out */
     85 		return;
     86 	fd = open("fifo", O_RDONLY);
     87 	if (fd == -1)
     88 		atf_tc_fail_errno("open");
     89 	atf_tc_fail("open returned %d", fd);
     90 }
     91 
     92 ATF_TP_ADD_TCS(tp)
     93 {
     94 
     95 	ATF_TP_ADD_TC(tp, openrestartsignal);
     96 
     97 	return atf_no_error();
     98 }
     99