endhostent

endhostent

Closes a Host File or TCP Connection

Portability: UNIX compatible

SYNOPSIS
DESCRIPTION
PORTABILITY
IMPLEMENTATION
RELATED FUNCTIONS

SYNOPSIS

#include <netdb.h>

void endhostent(void);

DESCRIPTION

endhostent closes a host file or TCP connection. endhostent is a combination of the host file and resolver versions of the BSD UNIX Socket Library endhostent .

In some instances, when the resolver is used to look up the host name, a virtual circuit (that is, a TCP connection) is used to communicate with the name server, based on the RESOLVEVIA statement in the TCPIP.DATA file or the RES_USEVC resolver option specified by your program. In these cases, you can use the RES_STAYOPEN resolver option to maintain the connection with the name server between queries. endhostent closes this connection. (See Bitwise OR Options for information about RES_USEVC and RES_STAYOPEN .)

In other instances, the host file is used as a source of host names. If the host file is opened with a sethostent call and the stayopen parameter is a nonzero value, endhostent closes the host file.

Refer to Network Administration for information on naming host files and the logic that determines whether the host file or the resolver is used for looking up names.

PORTABILITY

The logic that determines whether to use the host file or the resolver is not uniform across environments. At the source code level, however, endhostent is portable to other environments, including most UNIX systems, that implement BSD sockets.

IMPLEMENTATION

endhostent is a combination of the host file and resolver versions of the BSD UNIX Socket Library gethostbyaddr .

RELATED FUNCTIONS

sethostent , gethostent , gethostbyname

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