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