1 /*
2 * Check printing of character/block device numbers in -yy mode.
3 *
4 * Copyright (c) 2018 The strace developers.
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 "tests.h"
31
32 #include <stdio.h>
33 #include <unistd.h>
34
35 #include <asm/unistd.h>
36
37 #include <linux/fcntl.h>
38
39 #include <sys/sysmacros.h>
40
41 #if defined __NR_openat && defined O_PATH
42
43 int
main(void)44 main(void)
45 {
46 static const struct {
47 const char *path;
48 unsigned int major;
49 unsigned int minor;
50 bool blk;
51 bool optional;
52 } checks[] = {
53 { "/dev/zero", 1, 5, false, false },
54 { "/dev/full", 1, 7, false, false },
55 { "/dev/sda", 8, 0, true, true },
56 };
57
58 for (unsigned int i = 0; i < ARRAY_SIZE(checks); i++) {
59 /*
60 * We can't have nice things here and call openat() directly as
61 * some libcs (yes, musl, I'm looking at you now) are too
62 * frivolous in passing flags to the kernel.
63 */
64 long fd = syscall(__NR_openat, AT_FDCWD, checks[i].path,
65 O_RDONLY|O_PATH);
66
67 printf("openat(AT_FDCWD, \"%s\", O_RDONLY|O_PATH) = %s",
68 checks[i].path, sprintrc(fd));
69 if (fd >= 0)
70 printf("<%s<%s %u:%u>>",
71 checks[i].path,
72 checks[i].blk ? "block" : "char",
73 checks[i].major, checks[i].minor);
74 puts("");
75
76 if (fd < 0) {
77 if (checks[i].optional)
78 continue;
79 else
80 perror_msg_and_fail("openat(\"%s\")",
81 checks[i].path);
82 }
83
84 int rc = fsync(fd);
85
86 printf("fsync(%ld<%s<%s %u:%u>>) = %s\n",
87 fd, checks[i].path, checks[i].blk ? "block" : "char",
88 checks[i].major, checks[i].minor, sprintrc(rc));
89
90 close(fd);
91 }
92
93 puts("+++ exited with 0 +++");
94 return 0;
95 }
96
97 #else
98
99 SKIP_MAIN_UNDEFINED("__NR_openat && O_PATH")
100
101 #endif
102