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1/*2 * Copyright © 2020 Alexey Gladkov <gladkov.alexey@gmail.com>3 *4 * Permission to use, copy, modify, and distribute this software for any5 * purpose with or without fee is hereby granted, provided that the above6 * copyright notice and this permission notice appear in all copies.7 *8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF14 * 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 23int 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