GETSERVENT(3) | Library Functions Manual | GETSERVENT(3) |
getservent
, getservbyport
,
getservbyname
, setservent
,
endservent
—
#include <netdb.h>
struct servent *
getservent
();
struct servent *
getservbyname
(const
char *name, const char
*proto);
struct servent *
getservbyport
(int
port, const char
*proto);
void
setservent
(int
stayopen);
void
endservent
(void);
getservent
(),
getservbyname
(), and
getservbyport
() functions each return a pointer to an
object with the following structure containing the broken-out fields of a line
in the network services data base, /etc/services.
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:
The getservent
() function reads the next
line of the file, opening the file if necessary.
The setservent
() function 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
getservbyport
().
The endservent
() function closes the
file.
The getservbyname
() and
getservbyport
() functions 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.
EOF
or error.
getservent
(),
getservbyport
(),
getservbyname
(), setservent
(),
and endservent
() functions appeared in
4.2BSD.
May 25, 1995 | NetBSD 9.0 |