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#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
int main(int argc, char **argv) {
if (argc < 2) {
printf("Need a file argument\n");
return 1;
}
int fd = open(argv[1], O_RDONLY);
if (fd < 0) {
printf("Couldn't open file\n");
return 1;
}
uint32_t value = 0;
read(fd, &value, sizeof(value));
close(fd);
value = value ^ 0xffffffff;
if (value == 0x11223344) printf("Value one\n");
if (value == 0x44332211) printf("Value two\n");
if (value != 0x0) printf("Not zero\n");
return 0;
}
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