1 /*
2  * Check decoding of umode_t type syscall arguments.
3  *
4  * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5  * Copyright (c) 2016-2017 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 <stdio.h>
32 #include <unistd.h>
33 #include <sys/stat.h>
34 
35 #ifndef TEST_SYSCALL_PREFIX_ARGS
36 # define TEST_SYSCALL_PREFIX_ARGS
37 #endif
38 #ifndef TEST_SYSCALL_PREFIX_STR
39 # define TEST_SYSCALL_PREFIX_STR ""
40 #endif
41 
42 static const char *sample;
43 
44 static void
45 test_syscall(unsigned short mode)
46 {
47 	unsigned long lmode = (unsigned long) 0xffffffffffff0000ULL | mode;
48 	long rc = syscall(TEST_SYSCALL_NR, TEST_SYSCALL_PREFIX_ARGS
49 			  sample, lmode);
50 
51 	if (mode <= 07)
52 		printf("%s(%s\"%s\", 00%d) = %ld %s (%m)\n",
53 		       TEST_SYSCALL_STR, TEST_SYSCALL_PREFIX_STR,
54 		       sample, (int) mode, rc, errno2name());
55 	else
56 		printf("%s(%s\"%s\", %#03ho) = %ld %s (%m)\n",
57 		       TEST_SYSCALL_STR, TEST_SYSCALL_PREFIX_STR,
58 		       sample, mode, rc, errno2name());
59 }
60 
61 int
62 main(int ac, char **av)
63 {
64 	sample = av[0];
65 	test_syscall(0);
66 	test_syscall(0xffff);
67 	test_syscall(06);
68 	test_syscall(060);
69 	test_syscall(0600);
70 	test_syscall(024);
71 	test_syscall(S_IFREG);
72 	test_syscall(S_IFDIR | 06);
73 	test_syscall(S_IFLNK | 060);
74 	test_syscall(S_IFIFO | 0600);
75 	test_syscall(S_IFCHR | 024);
76 	test_syscall((0xffff & ~S_IFMT) | S_IFBLK);
77 
78 	puts("+++ exited with 0 +++");
79 	return 0;
80 }
81