.\" Copyright (c) 1983 Regents of the University of California.
.\" All rights reserved. The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\" @(#)getservent.3 6.1 (Berkeley) %G%
getservent, getservbyport, getservbyname, setservent, endservent \- get service entry
struct servent *getservent()
struct servent *getservbyname(name, proto)
struct servent *getservbyport(port, proto)
each return a pointer to an object with the
containing the broken-out
fields of a line in the network services data base,
char *s_name; /* official name of service */
char **s_aliases; /* alias list */
long s_port; /* port service resides at */
char *s_proto; /* protocol to use */
The members of this structure are:
The official name of the service.
A zero terminated list of alternate names for the service.
The port number at which the service resides.
Port numbers are returned in network byte order.
The name of the protocol to use when contacting the
reads the next line of the file, opening the file if necessary.
opens and rewinds the file. If the
the net data base will not be closed after each call to
(either directly, or indirectly through one of
the other \*(lqgetserv\*(rq calls).
sequentially search from the beginning
of the file until a matching
or until EOF is encountered.
If a protocol name is also supplied (non-NULL),
searches must also match the protocol.
getprotoent(3N), services(5)
(0) returned on EOF or error.
is contained in a static area
so it must be copied if it is
to be saved. Expecting port
numbers to fit in a 32 bit
quantity is probably naive.