EI_NIDENT
unsigned char e_ident[EI_NIDENT]; /* File identification. */
unsigned char e_ident[EI_NIDENT]; /* File identification. */
char buffer[EI_NIDENT];
if (read(fd, buffer, EI_NIDENT) < EI_NIDENT) {
if (write(fd, buffer, EI_NIDENT) != EI_NIDENT) {