struct netent *
getnetent()
struct netent *
getnetbyname(const char *name)
struct netent *
getnetbyaddr(uint32_t net, int type)
setnetent(int stayopen)
endnetent()
),
getnetbyname(),
and
getnetbyaddr()
functions
each return a pointer to an object with the
following structure
containing the broken-out
fields of a line in the network data base as described in
networks(5).
struct netent {
char *n_name; /* official name of net */
char **n_aliases; /* alias list */
int n_addrtype; /* net number type */
uint32_t n_net; /* net number */
};
The members of this structure are:
n_namen_aliasesn_addrtypen_net
The
getnetent()
function
reads the next line of the file, opening the file if necessary.
The
setnetent()
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
getnetbyname()
or
getnetbyaddr().
The
endnetent()
function
closes the file.
The
getnetbyname()
function
and
getnetbyaddr()
sequentially search from the beginning
of the file until a matching
net name or
net address and type is found,
or until
EOF
is encountered.
Network numbers are supplied in host order.
/etc/networksEOF
or error.
),
getnetbyaddr(),
getnetbyname(),
setnetent(),
and
endnetent()
functions appeared in
4.2BSD.