NAME

if_indextoname − Map an interface index to an interface name

SYNOPSIS

#include <net/if.h>
char ∗if_indextoname(
        unsigned int ifindex,
        char ∗ifname );

LIBRARY

Standard C Library (libc)

PARAMETERS

ifindex
Specifies the index number.

ifname
Points to a buffer, IFNAMSIZ bytes in length, into which the function will place the interface name. IFNAMSIZ is defined in <net/if.h>. 

DESCRIPTION

The if_indextoname() function maps an interface index number to its corresponding interface name. 

RETURN VALUES

Upon successful conversion, the if_indextoname() function returns the value specified in the ifname parameter, which points the buffer that now contains the interface name.  If no interface name corresponds to the index, it returns a NULL pointer. 

SEE ALSO

Functions: if_freenameindex(3), if_nameindex(3), if_nametoindex(3).