1 /*
2  * Check decoding of prctl PR_GET_PDEATHSIG/PR_SET_PDEATHSIG operations.
3  *
4  * Copyright (c) 2016 JingPiao Chen <chenjingpiao@foxmail.com>
5  * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. The name of the author may not be used to endorse or promote products
17  *    derived from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #include "tests.h"
32 #include <asm/unistd.h>
33 #include <linux/prctl.h>
34 
35 #if defined __NR_prctl && defined PR_GET_PDEATHSIG && defined PR_SET_PDEATHSIG
36 
37 # include <stdio.h>
38 # include <unistd.h>
39 # include <sys/signal.h>
40 
41 int
main(void)42 main(void)
43 {
44 	static const kernel_ulong_t bogus_signal =
45 		(kernel_ulong_t) 0xbadc0deddeadfeedULL;
46 
47 	int *pdeathsig = tail_alloc(sizeof(*pdeathsig));
48 	long rc;
49 
50 	rc = syscall(__NR_prctl, PR_SET_PDEATHSIG, bogus_signal);
51 	printf("prctl(PR_SET_PDEATHSIG, %llu) = %s\n",
52 	       (unsigned long long) bogus_signal, sprintrc(rc));
53 
54 	rc = syscall(__NR_prctl, PR_SET_PDEATHSIG, SIGINT);
55 	printf("prctl(PR_SET_PDEATHSIG, SIGINT) = %s\n", sprintrc(rc));
56 
57 	rc = syscall(__NR_prctl, PR_GET_PDEATHSIG, NULL);
58 	printf("prctl(PR_GET_PDEATHSIG, NULL) = %s\n", sprintrc(rc));
59 
60 	rc = syscall(__NR_prctl, PR_GET_PDEATHSIG, pdeathsig + 1);
61 	printf("prctl(PR_GET_PDEATHSIG, %p) = %s\n",
62 	       pdeathsig + 1, sprintrc(rc));
63 
64 	rc = syscall(__NR_prctl, PR_GET_PDEATHSIG, pdeathsig);
65 	if (rc) {
66 		printf("prctl(PR_GET_PDEATHSIG, %p) = %s\n",
67 		       pdeathsig, sprintrc(rc));
68 	} else {
69 		printf("prctl(PR_GET_PDEATHSIG, [SIGINT]) = %s\n",
70 		       sprintrc(rc));
71 	}
72 
73 	puts("+++ exited with 0 +++");
74 	return 0;
75 }
76 
77 #else
78 
79 SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_PDEATHSIG && PR_SET_PDEATHSIG")
80 
81 #endif
82