1 | /* |
2 | * Copyright © 2020 Alexey Gladkov <gladkov.alexey@gmail.com> |
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 | #include <assert.h> |
17 | #include <stdlib.h> |
18 | #include <stdio.h> |
19 | #include <sys/mount.h> |
20 | #include <sys/types.h> |
21 | #include <sys/stat.h> |
22 | |
23 | int main(void) |
24 | { |
25 | struct stat proc_st1, proc_st2; |
26 | char procbuff[] = "/tmp/proc.XXXXXX/meminfo" ; |
27 | char procdir1[] = "/tmp/proc.XXXXXX" ; |
28 | char procdir2[] = "/tmp/proc.XXXXXX" ; |
29 | |
30 | assert(mkdtemp(procdir1) != NULL); |
31 | assert(mkdtemp(procdir2) != NULL); |
32 | |
33 | assert(!mount("proc" , procdir1, "proc" , 0, "hidepid=1" )); |
34 | assert(!mount("proc" , procdir2, "proc" , 0, "hidepid=2" )); |
35 | |
36 | snprintf(procbuff, sizeof(procbuff), "%s/meminfo" , procdir1); |
37 | assert(!stat(procbuff, &proc_st1)); |
38 | |
39 | snprintf(procbuff, sizeof(procbuff), "%s/meminfo" , procdir2); |
40 | assert(!stat(procbuff, &proc_st2)); |
41 | |
42 | umount(procdir1); |
43 | umount(procdir2); |
44 | |
45 | assert(proc_st1.st_dev != proc_st2.st_dev); |
46 | |
47 | return 0; |
48 | } |
49 | |