cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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fd-002-posix-eq.c (1629B)


      1/*
      2 * Copyright © 2018 Alexey Dobriyan <adobriyan@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// Test that open(/proc/*/fd/*) opens the same file.
     17#undef NDEBUG
     18#include <assert.h>
     19#include <stdio.h>
     20#include <sys/types.h>
     21#include <sys/stat.h>
     22#include <fcntl.h>
     23#include <unistd.h>
     24
     25int main(void)
     26{
     27	int fd0, fd1, fd2;
     28	struct stat st0, st1, st2;
     29	char buf[64];
     30	int rv;
     31
     32	fd0 = open("/", O_DIRECTORY|O_RDONLY);
     33	assert(fd0 >= 0);
     34
     35	snprintf(buf, sizeof(buf), "/proc/self/fd/%u", fd0);
     36	fd1 = open(buf, O_RDONLY);
     37	assert(fd1 >= 0);
     38
     39	snprintf(buf, sizeof(buf), "/proc/thread-self/fd/%u", fd0);
     40	fd2 = open(buf, O_RDONLY);
     41	assert(fd2 >= 0);
     42
     43	rv = fstat(fd0, &st0);
     44	assert(rv == 0);
     45	rv = fstat(fd1, &st1);
     46	assert(rv == 0);
     47	rv = fstat(fd2, &st2);
     48	assert(rv == 0);
     49
     50	assert(st0.st_dev == st1.st_dev);
     51	assert(st0.st_ino == st1.st_ino);
     52
     53	assert(st0.st_dev == st2.st_dev);
     54	assert(st0.st_ino == st2.st_ino);
     55
     56	return 0;
     57}