1/*
2 * Check decoding of setreuid/setregid/setreuid32/setregid32 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
34static int
35ugid2int(const unsigned UGID_TYPE ugid)
36{
37	if ((unsigned UGID_TYPE) -1U == ugid)
38		return -1;
39	else
40		return ugid;
41}
42
43static void
44print_int(const unsigned int num)
45{
46	if (num == -1U)
47		printf("-1");
48	else
49		printf("%u", num);
50}
51
52static int
53num_matches_id(const unsigned int num, const unsigned int ugid)
54{
55	return num == ugid || num == -1U;
56}
57
58#define PAIR(val)	{ val, ugid }, { ugid, val }
59
60int
61main(void)
62{
63	unsigned int ugid = GETUGID;
64	CHECK_OVERFLOWUGID(ugid);
65
66	const struct {
67		const long r, e;
68	} tests[] = {
69		{ ugid, ugid },
70		PAIR((unsigned long) 0xffffffff00000000ULL | ugid),
71		PAIR(-1U),
72		PAIR(-1L),
73		PAIR(0xffff0000U | ugid),
74		PAIR(0xffff),
75		PAIR(0xc0deffffU)
76	};
77
78	unsigned int i;
79
80	for (i = 0; i < ARRAY_SIZE(tests); ++i) {
81		const unsigned int rn = ugid2int(tests[i].r);
82		const unsigned int en = ugid2int(tests[i].e);
83
84		if (!num_matches_id(rn, ugid) || !num_matches_id(en, ugid))
85			continue;
86
87		if (syscall(SYSCALL_NR, tests[i].r, tests[i].e)) {
88			if (!i && ENOSYS == errno) {
89				printf("%s(%u, %u) = -1 ENOSYS (%m)\n",
90				       SYSCALL_NAME, ugid, ugid);
91				break;
92			}
93			perror_msg_and_fail("%s(%#lx, %#lx)", SYSCALL_NAME,
94					    tests[i].r, tests[i].e);
95		}
96
97		printf("%s(", SYSCALL_NAME);
98		print_int(rn);
99		printf(", ");
100		print_int(en);
101		printf(") = 0\n");
102	}
103
104	puts("+++ exited with 0 +++");
105	return 0;
106}
107