Commit | Line | Data |
---|---|---|
35318db5 | 1 | /* |
ee9294d6 | 2 | * Copyright © 2018 Alexey Dobriyan <adobriyan@gmail.com> |
35318db5 AD |
3 | * |
4 | * Permission to use, copy, modify, and distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | /* Test readlink /proc/self/map_files/... */ | |
17 | #include <errno.h> | |
18 | #include <sys/types.h> | |
19 | #include <sys/stat.h> | |
20 | #include <fcntl.h> | |
21 | #include <stdio.h> | |
22 | #include <unistd.h> | |
23 | #include <sys/mman.h> | |
24 | #include <stdlib.h> | |
25 | ||
26 | static void pass(const char *fmt, unsigned long a, unsigned long b) | |
27 | { | |
28 | char name[64]; | |
29 | char buf[64]; | |
30 | ||
31 | snprintf(name, sizeof(name), fmt, a, b); | |
32 | if (readlink(name, buf, sizeof(buf)) == -1) | |
33 | exit(1); | |
34 | } | |
35 | ||
36 | static void fail(const char *fmt, unsigned long a, unsigned long b) | |
37 | { | |
38 | char name[64]; | |
39 | char buf[64]; | |
40 | ||
41 | snprintf(name, sizeof(name), fmt, a, b); | |
42 | if (readlink(name, buf, sizeof(buf)) == -1 && errno == ENOENT) | |
43 | return; | |
44 | exit(1); | |
45 | } | |
46 | ||
47 | int main(void) | |
48 | { | |
49 | const unsigned int PAGE_SIZE = sysconf(_SC_PAGESIZE); | |
50 | void *p; | |
51 | int fd; | |
52 | unsigned long a, b; | |
53 | ||
54 | fd = open("/dev/zero", O_RDONLY); | |
55 | if (fd == -1) | |
56 | return 1; | |
57 | ||
58 | p = mmap(NULL, PAGE_SIZE, PROT_NONE, MAP_PRIVATE|MAP_FILE, fd, 0); | |
59 | if (p == MAP_FAILED) | |
60 | return 1; | |
61 | ||
62 | a = (unsigned long)p; | |
63 | b = (unsigned long)p + PAGE_SIZE; | |
64 | ||
65 | pass("/proc/self/map_files/%lx-%lx", a, b); | |
66 | fail("/proc/self/map_files/ %lx-%lx", a, b); | |
67 | fail("/proc/self/map_files/%lx -%lx", a, b); | |
68 | fail("/proc/self/map_files/%lx- %lx", a, b); | |
69 | fail("/proc/self/map_files/%lx-%lx ", a, b); | |
70 | fail("/proc/self/map_files/0%lx-%lx", a, b); | |
71 | fail("/proc/self/map_files/%lx-0%lx", a, b); | |
72 | if (sizeof(long) == 4) { | |
73 | fail("/proc/self/map_files/100000000%lx-%lx", a, b); | |
74 | fail("/proc/self/map_files/%lx-100000000%lx", a, b); | |
75 | } else if (sizeof(long) == 8) { | |
76 | fail("/proc/self/map_files/10000000000000000%lx-%lx", a, b); | |
77 | fail("/proc/self/map_files/%lx-10000000000000000%lx", a, b); | |
78 | } else | |
79 | return 1; | |
80 | ||
81 | return 0; | |
82 | } |