setnetent() — Open the network information data set

Standards

Format

#define _XOPEN_SOURCE_EXTENDED 1
#include <netdb.h>

void setnetent(int stayopen);

#define _OE_SOCKETS
#include <netdb.h>

void setnetent(int stayopen);

General description

The setnetent() function opens and rewinds the tcpip.HOSTS.ADDRINFO data set, which contains information about known networks. If the stayopen flag is nonzero, the tcpip.HOSTS.ADDRINFO remains open after each call to setnetent().

Special behavior for C++: To use this function with C++, you must use the _XOPEN_SOURCE_EXTENDED 1 feature test macro.

Returned value

setnetent() returns no values.

Related information

• netdb.h
• endhostent() — Close the host information data set
• endnetent() — Close network information data sets
• getnetbyaddr() — Get a network entry by address
• getnetbyname() — Get a network entry by name
• getnetent() — Get the next network entry