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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create-read.c (715B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <stdio.h>
      3#include <stdint.h>
      4#include <stdlib.h>
      5#include <unistd.h>
      6#include <sys/types.h>
      7#include <sys/stat.h>
      8#include <fcntl.h>
      9#include <errno.h>
     10#include <string.h>
     11
     12int main(int argc, char **argv)
     13{
     14	const char *path;
     15	char buf[4];
     16	int fd, rc;
     17
     18	if (argc < 2) {
     19		fprintf(stderr, "usage: %s <path>\n", argv[0]);
     20		return EXIT_FAILURE;
     21	}
     22
     23	path = argv[1];
     24
     25	/* create a test variable */
     26	fd = open(path, O_RDWR | O_CREAT, 0600);
     27	if (fd < 0) {
     28		perror("open(O_WRONLY)");
     29		return EXIT_FAILURE;
     30	}
     31
     32	rc = read(fd, buf, sizeof(buf));
     33	if (rc != 0) {
     34		fprintf(stderr, "Reading a new var should return EOF\n");
     35		return EXIT_FAILURE;
     36	}
     37
     38	return EXIT_SUCCESS;
     39}