Ar_port
Ar_port ar_port;
int read_member_header (Ar_port *header, FILE *fd, char* filename);
arp->first_ar_mem = ftell(arp->fd) - (long) sizeof (Ar_port);
Ar_port *ar_member_header;
(Ar_port *) alloca((int) sizeof(Ar_port))) == NULL){
read_member_header(Ar_port *header, FILE *fd, char* filename)
int num = fread((char *) header, sizeof (Ar_port), 1, fd);