All rights reserved.
Redistribution and use in source and binary forms are permitted
provided that the above copyright notice and this paragraph are
duplicated in all such forms and that any documentation,
advertising materials, and other materials related to such
distribution and use acknowledge that the software was developed
by the University of California, Berkeley. The name of the
University may not be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
@(#)getservent.3 6.4 (Berkeley) 02/14/89
#include <netdb.h>struct servent *getservent()
struct servent *getservbyname(name, proto) char *name, *proto;
struct servent *getservbyport(port, proto) int port; char *proto;
setservent(stayopen) int stayopen
endservent()
struct servent {
char *s_name; /* official name of service */
char **s_aliases; /* alias list */
int s_port; /* port service resides at */
char *s_proto; /* protocol to use */
};
The members of this structure are:
\w's_aliases'u+2n s_name The official name of the service.
\w's_aliases'u+2n s_aliases A zero terminated list of alternate names for the service.
\w's_aliases'u+2n s_port The port number at which the service resides. Port numbers are returned in network byte order.
\w's_aliases'u+2n s_proto The name of the protocol to use when contacting the service.
Getservent reads the next line of the file, opening the file if necessary.
Setservent opens and rewinds the file. If the stayopen flag is non-zero, the net data base will not be closed after each call to getservbyname or .IR getservbyport .
Endservent closes the file.
Getservbyname and getservbyport sequentially search from the beginning of the file until a matching protocol name or port number is found, or until EOF is encountered. If a protocol name is also supplied (non-NULL), searches must also match the protocol.