Looking Up a Computer Name

NAME
       gethostbyname - get network host entry

SYNOPSIS
       #include <netdb.h>
       extern int h_errno;

       struct hostent
       *gethostbyname(const char *name);

struct hostent {
   char  *h_name;
   char **h_aliases;
   int    h_addrtype;
   int    h_length;
   char **h_addr_list;
};
#define h_addr h_addr_list[0]

• name could be a name or dotted decimal address

• Hosts can have many names in h_aliases

• Hosts can have many addresses in h_addr_list

• Addresses in h_addr_list are not strings
  network order addresses ready to copy and use