truncate

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>

//./a.out file1 file2
int main(int argc, const char *argv[])
{
	int len;
	struct stat f_info;

	if(stat(argv[1],&f_info) < 0)
	{
		perror("Fail to stat");
		return -1;
	}

	len = f_info.st_size;
	
	if(truncate(argv[2],len) < 0)
	{
		perror("fail to truncate");
		return -1;
	}
	
	return 0;
}