1 /*
2 * Check decoding of setuid/setgid/setuid32/setgid32 syscalls.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016-2018 The strace developers.
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 <errno.h>
32 #include <stdio.h>
33 #include <unistd.h>
34
35 void
printuid(unsigned UGID_TYPE id)36 printuid(unsigned UGID_TYPE id)
37 {
38 if (id == (unsigned UGID_TYPE) -1U)
39 printf("-1");
40 else
41 printf("%u", id);
42 }
43
44 int
main(void)45 main(void)
46 {
47 unsigned int ugid = GETUGID;
48 CHECK_OVERFLOWUGID(ugid);
49
50 const long tests[] = {
51 ugid,
52 0xffff0000U | ugid,
53 (unsigned long) 0xffffffff00000000ULL | ugid,
54 0xffffU,
55 -1U,
56 -1L
57 };
58
59 unsigned int i;
60
61 for (i = 0; i < ARRAY_SIZE(tests); ++i) {
62 const unsigned int num = (unsigned UGID_TYPE) tests[i];
63 long expected;
64
65 errno = 0;
66
67 if (num == ugid)
68 expected = 0;
69 else if ((UGID_TYPE) num == (UGID_TYPE) -1U)
70 expected = -1;
71 else
72 continue;
73
74 const long rc = syscall(SYSCALL_NR, tests[i]);
75 const char *errstr = sprintrc(rc);
76
77 if (rc != expected) {
78 if (!i && ENOSYS == errno) {
79 printf("%s(%u) = %s\n",
80 SYSCALL_NAME, ugid, errstr);
81 break;
82 }
83 perror_msg_and_fail("%s(%#lx) = %ld != %ld",
84 SYSCALL_NAME, tests[i],
85 rc, expected);
86 }
87
88 printf("%s(", SYSCALL_NAME);
89 printuid(num);
90 printf(") = %s\n", errstr);
91 }
92
93 puts("+++ exited with 0 +++");
94 return 0;
95 }
96