Originální popis anglicky:
getnetent, getnetbyname, getnetbyaddr, setnetent, endnetent - get network entry
Návod, kniha: Linux Programmer's Manual
#include <netdb.h>
struct netent *getnetent(void);
struct netent *getnetbyname(const char *name);
struct netent *getnetbyaddr(long net, int type);
void setnetent(int stayopen);
void endnetent(void);
The
getnetent() function reads the next line from the file
/etc/networks and returns a structure
netent containing the
broken out fields from the line. The
/etc/networks file is opened if
necessary.
The
getnetbyname() function returns a
netent structure for the
line from
/etc/networks that matches the network
name.
The
getnetbyaddr() function returns a
netent structure for the
line that matches the network number
net of type
type.
The
setnetent() function opens and rewinds the
/etc/networks file.
If
stayopen is true (1), then the file will not be closed between calls
to
getnetbyname() and
getnetbyaddr().
The
endservent() function closes
/etc/networks.
The
netent structure is defined in
<netdb.h> as follows:
struct netent {
char *n_name; /* official network name */
char **n_aliases; /* alias list */
int n_addrtype; /* net address type */
unsigned long int n_net; /* network number */
}
The members of the
netent structure are:
- n_name
- The official name of the network.
- n_aliases
- A zero terminated list of alternative names for the
network.
- n_addrtype
- The type of the network number; always AF_INET.
- n_net
- The network number in host byte order.
The
getnetent(),
getnetbyname() and
getnetbyaddr()
functions return the
netent structure, or a NULL pointer if an error
occurs or the end of the file is reached.
- /etc/networks
- networks database file
BSD 4.3
getprotoent(3),
getservent(3),
networks(5)
RFC 1101
