Content-type: text/html
Man page of GETSERVENT
GETSERVENT
Section: Linux Programmer's Manual (3)
Updated: 2008-08-19
Index
Return to Main Contents
NAME
getservent, getservbyname, getservbyport, setservent, endservent -
get service entry
SYNOPSIS
#include <netdb.h>
struct servent *getservent(void);
struct servent *getservbyname(const char *name, const char *proto);
struct servent *getservbyport(int port, const char *proto);
void setservent(int stayopen);
void endservent(void);
DESCRIPTION
The
getservent()
function reads the next entry from the services database (see
services(5))
and returns a servent structure containing
the broken-out fields from the entry.
A connection is opened to the database if necessary.
The
getservbyname()
function returns a servent structure
for the entry from the database
that matches the service name using protocol proto.
If proto is NULL, any protocol will be matched.
A connection is opened to the database if necessary.
The
getservbyport()
function returns a servent structure
for the entry from the database
that matches the port port (given in network byte order)
using protocol proto.
If proto is NULL, any protocol will be matched.
A connection is opened to the database if necessary.
The
setservent()
function opens a connection to the database,
and sets the next entry to the first entry.
If stayopen is non-zero,
then the connection to the database
will not be closed between calls to one of the
getserv*()
functions.
The
endservent()
function closes the connection to the database.
The servent structure is defined in <netdb.h> as follows:
struct servent {
char *s_name; /* official service name */
char **s_aliases; /* alias list */
int s_port; /* port number */
char *s_proto; /* protocol to use */
}
The members of the servent structure are:
- s_name
-
The official name of the service.
- s_aliases
-
A NULL-terminated list of alternative names for the service.
- s_port
-
The port number for the service given in network byte order.
- s_proto
-
The name of the protocol to use with this service.
RETURN VALUE
The
getservent(),
getservbyname()
and
getservbyport()
functions return a pointer to a
statically allocated servent structure, or a NULL pointer if an
error occurs or the end of the file is reached.
FILES
- /etc/services
-
services database file
CONFORMING TO
4.3BSD, POSIX.1-2001.
SEE ALSO
getnetent(3),
getprotoent(3),
getservent_r(3),
services(5)
COLOPHON
This page is part of release 3.23 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- FILES
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
This document was created by
man2html,
using the manual pages.
Time: 13:37:24 GMT, September 02, 2010