getifaddrs()

Get a network interface address

Synopsis:

#include <sys/types.h>
#include <sys/socket.h>
#include <ifaddrs.h>

int getifaddrs( struct ifaddrs ** ifap );

Arguments:

ifap

The address of a location where the function can store a pointer to a linked list of ifaddrs structures that contain the data related to the network interfaces on the local machine.

Library:

libsocket

Use the -l socket option to qcc to link against this library.

Description:

The getifaddrs() function stores a reference to a linked list of the network interfaces on the local machine in the memory referenced by ifap.

The data returned by getifaddrs() is dynamically allocated; you should free it by calling freeifaddrs() when you no longer need it.

Returns:

0

Success.

-1

An error occurred (errno is set).

Errors:

The getifaddrs() function may fail and set errno for any of the errors specified by:

• ioctl()
• malloc()
• socket()
• sysctl()

Classification:

Unix

See also:

errno, freeifaddrs(), ifaddrs, ioctl(), malloc(), socket(), sysctl()