2 * Copyright © 2018 Alexey Dobriyan <adobriyan@gmail.com>
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.
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.
16 // Test that open(/proc/*/fd/*) opens the same file.
20 #include <sys/types.h>
28 struct stat st0, st1, st2;
32 fd0 = open("/", O_DIRECTORY|O_RDONLY);
35 snprintf(buf, sizeof(buf), "/proc/self/fd/%u", fd0);
36 fd1 = open(buf, O_RDONLY);
39 snprintf(buf, sizeof(buf), "/proc/thread-self/fd/%u", fd0);
40 fd2 = open(buf, O_RDONLY);
43 rv = fstat(fd0, &st0);
45 rv = fstat(fd1, &st1);
47 rv = fstat(fd2, &st2);
50 assert(st0.st_dev == st1.st_dev);
51 assert(st0.st_ino == st1.st_ino);
53 assert(st0.st_dev == st2.st_dev);
54 assert(st0.st_ino == st2.st_ino);