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