endhostent man page on Ultrix

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gethostent(3n)							gethostent(3n)

       gethostent,  gethostbyaddr, gethostbyname, sethostent, endhostent - get
       hosts entry

       #include <netdb.h>

       struct hostent *gethostent()

       struct hostent *gethostbyname(name)
       char *name;

       struct hostent *gethostbyaddr(addr, len, type)
       char *addr; int len, type;

       void sethostent(stayopen)
       int stayopen;

       void endhostent()

       The and subroutines return a pointer to an object  with	the  following
       structure  containing  the  broken-out  fields  reflecting  information
       obtained from the database.
       struct	hostent {
		char   *h_name;	      /* official name of host */
		char   **h_aliases;   /* alias list */
		int    h_addrtype;    /* address type */
		int    h_length;      /* length of address */
		char   **h_addr_list; /* list of addresses from name server */
       #define	h_addr h_addr_list[0] /* address for backward compatibility */

       The members of this structure are:

       h_name	   Official name of the host.

       h_aliases   A zero terminated array of alternate names for the host.

       h_addrtype  The	type  of  address  being  returned;  currently	always

       h_length	   The length, in bytes, of the address.

       h_addr	   A  pointer  to  the	network	 address  for  the host.  Host
		   addresses are returned in network byte order.

       If the stayopen flag on a subroutine is NULL,  the  hosts  database  is
       opened.	 Otherwise  the has the effect of rewinding the database.  The
       may be called to close the database when processing is complete.

       The subroutine simply reads the next line  while	 and  search  until  a
       matching	 name,	or  addr,  len, type is found (or until EOF is encoun‐
       tered).	The subroutine keeps a pointer in the database, allowing  suc‐
       cessive calls to be used to search the entire file.

       The and subroutines query the database.

       A call to must be made before a loop using in order to perform initial‐
       ization and an must be used after the loop.  Both and make calls to and

       All information is contained in a static area so it must be  copied  if
       it  is  to  be  saved.	Only  the Internet address format is currently

       If YP is running, does not return the entries in any particular	order.
       See the Guide to the Yellow Pages Service for setup information.

       The  database  may  also be distributed via the BIND/Hesiod naming ser‐
       vice.  See the Guide to the BIND/Hesiod Service for more information.

Return Values
       Null pointer (0) returned on EOF or error.

See Also
       hosts(5), svc.conf(5)
       Guide to the BIND/Hesiod Service
       Guide to the Yellow Pages Service


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