1 /*
2  * Check decoding of unshare syscall.
3  *
4  * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. The name of the author may not be used to endorse or promote products
16  *    derived from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #include "tests.h"
31 
32 #include <asm/unistd.h>
33 
34 #ifdef __NR_unshare
35 
36 # include <stdio.h>
37 # include <unistd.h>
38 
39 int
40 main(void)
41 {
42 	static const kernel_ulong_t bogus_flags =
43 		(kernel_ulong_t) 0xbadc0ded0000000fULL;
44 
45 	static struct {
46 		kernel_ulong_t val;
47 		const char *str;
48 	} unshare_flags[] = {
49 		{ ARG_STR(0) },
50 		{ 0xdeadca75,
51 			"CLONE_THREAD|CLONE_FS|CLONE_SIGHAND|CLONE_SYSVSEM|"
52 			"CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET|CLONE_NEWUSER|"
53 			"CLONE_NEWCGROUP|0x80a8c075" },
54 		{ 0x2000000, "CLONE_NEWCGROUP" },
55 		{ ARG_STR(0x81f8f0ff) " /* CLONE_??? */" },
56 	};
57 
58 	long rc;
59 	unsigned int i;
60 
61 	rc = syscall(__NR_unshare, bogus_flags);
62 	printf("unshare(%#llx /* CLONE_??? */) = %s\n",
63 	       (unsigned long long) bogus_flags, sprintrc(rc));
64 
65 	for (i = 0; i < ARRAY_SIZE(unshare_flags); i++) {
66 		rc = syscall(__NR_unshare, unshare_flags[i].val);
67 		printf("unshare(%s) = %s\n",
68 		       unshare_flags[i].str, sprintrc(rc));
69 	}
70 
71 	puts("+++ exited with 0 +++");
72 
73 	return 0;
74 }
75 
76 #else
77 
78 SKIP_MAIN_UNDEFINED("__NR_unshare");
79 
80 #endif
81