1 /*
2 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "tests.h"
29 #include <asm/unistd.h>
30 #ifdef HAVE_PRCTL
31 # include <sys/prctl.h>
32 #endif
33
34 #if defined HAVE_PRCTL && defined PR_SET_SECCOMP && defined __NR_exit
35
36 # include <stdio.h>
37 # include <unistd.h>
38
39 int
main(void)40 main(void)
41 {
42 static const char text1[] =
43 "prctl(PR_SET_SECCOMP, SECCOMP_MODE_STRICT) = 0\n";
44 static const char text2[] = "+++ exited with 0 +++\n";
45
46 int rc = prctl(PR_SET_SECCOMP, -1L, 1, 2, 3);
47 printf("prctl(PR_SET_SECCOMP, %#lx /* SECCOMP_MODE_??? */, 0x1, 0x2, 0x3)"
48 " = %d %s (%m)\n", -1L, rc, errno2name());
49 fflush(stdout);
50
51 rc = prctl(PR_SET_SECCOMP, 1);
52 if (rc) {
53 printf("prctl(PR_SET_SECCOMP, SECCOMP_MODE_STRICT)"
54 " = %d %s (%m)\n", rc, errno2name());
55 fflush(stdout);
56 rc = 0;
57 } else {
58 /*
59 * If kernel implementaton of SECCOMP_MODE_STRICT is buggy,
60 * the following syscall will result to SIGKILL.
61 */
62 rc = write(1, text1, LENGTH_OF(text1)) != LENGTH_OF(text1);
63 }
64
65 rc += write(1, text2, LENGTH_OF(text2)) != LENGTH_OF(text2);
66 return !!syscall(__NR_exit, rc);
67 }
68
69 #else
70
71 SKIP_MAIN_UNDEFINED("HAVE_PRCTL && PR_SET_SECCOMP && __NR_exit")
72
73 #endif
74