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