#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>

int main()
{
 char *p = "foo";
 char buf[] = "bar";
 int desc;
 
 desc = open(p, O_RDWR);
 write(desc, buf, 4096);
 close(desc);
 exit(0);
}