1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright © 2020 Alexey Gladkov <gladkov.alexey@gmail.com>
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Permission to use, copy, modify, and distribute this software for any
5*4882a593Smuzhiyun * purpose with or without fee is hereby granted, provided that the above
6*4882a593Smuzhiyun * copyright notice and this permission notice appear in all copies.
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9*4882a593Smuzhiyun * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10*4882a593Smuzhiyun * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11*4882a593Smuzhiyun * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12*4882a593Smuzhiyun * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13*4882a593Smuzhiyun * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14*4882a593Smuzhiyun * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15*4882a593Smuzhiyun */
16*4882a593Smuzhiyun #include <assert.h>
17*4882a593Smuzhiyun #include <stdlib.h>
18*4882a593Smuzhiyun #include <stdio.h>
19*4882a593Smuzhiyun #include <sys/mount.h>
20*4882a593Smuzhiyun #include <sys/types.h>
21*4882a593Smuzhiyun #include <sys/stat.h>
22*4882a593Smuzhiyun
main(void)23*4882a593Smuzhiyun int main(void)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun struct stat proc_st1, proc_st2;
26*4882a593Smuzhiyun char procbuff[] = "/tmp/proc.XXXXXX/meminfo";
27*4882a593Smuzhiyun char procdir1[] = "/tmp/proc.XXXXXX";
28*4882a593Smuzhiyun char procdir2[] = "/tmp/proc.XXXXXX";
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun assert(mkdtemp(procdir1) != NULL);
31*4882a593Smuzhiyun assert(mkdtemp(procdir2) != NULL);
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun assert(!mount("proc", procdir1, "proc", 0, "hidepid=1"));
34*4882a593Smuzhiyun assert(!mount("proc", procdir2, "proc", 0, "hidepid=2"));
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun snprintf(procbuff, sizeof(procbuff), "%s/meminfo", procdir1);
37*4882a593Smuzhiyun assert(!stat(procbuff, &proc_st1));
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun snprintf(procbuff, sizeof(procbuff), "%s/meminfo", procdir2);
40*4882a593Smuzhiyun assert(!stat(procbuff, &proc_st2));
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun umount(procdir1);
43*4882a593Smuzhiyun umount(procdir2);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun assert(proc_st1.st_dev != proc_st2.st_dev);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return 0;
48*4882a593Smuzhiyun }
49