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
35void
36printuid(unsigned UGID_TYPE id)
37{
38	if (id == (unsigned UGID_TYPE) -1U)
39		printf("-1");
40	else
41		printf("%u", id);
42}
43
44int
45main(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