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Name

Synopsis

#include <netdb.h>
struct netent *getnetent(void);
struct netent *getnetbyname(const char *name);
struct netent *getnetbyaddr(uint32_t net, int type);
void setnetent(int stayopen);
void endnetent(void);

Description

The getnetbyname() function returns a netent structure for the entry from the database that matches the network name.

The getnetbyaddr() function returns a netent structure for the entry from the database that matches the network number net of type type. The net argument must be in host byte order.

The setnetent() function opens a connection to the database, and sets the next entry to the first entry. If stayopen is nonzero, then the connection to the database will not be closed between calls to one of the getnet*() functions.

The endnetent() function closes the connection to the database.

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 */
    uint32_t   n_net;      /* network number */
}

The members of the netent structure are:

n_name

The official name of the network.

n_aliases

A NULL-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.

Return Value

Files

/etc/networks

networks database file

Conforming to

Notes

See Also

Colophon

Table of Contents

• Name
• Synopsis
• Description
• Return Value
• Files
• Conforming to
• Notes
• See Also
• Colophon