NAME

if_indextoname — map a network interface index to its corresponding name

SYNOPSIS

#include <net/if.h>

char *if_indextoname(unsigned ifindex, char *ifname);


DESCRIPTION

The if_indextoname() function shall map an interface index to its corresponding name.

When this function is called, ifname shall point to a buffer of at least {IF_NAMESIZE} bytes. The function shall place in this buffer the name of the interface with index ifindex.

RETURN VALUE

If ifindex is an interface index, then the function shall return the value supplied in ifname, which points to a buffer now containing the interface name. Otherwise, the function shall return a null pointer and set errno to indicate the error.

ERRORS

The if_indextoname() function shall fail if:

[ENXIO]

The interface does not exist.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

getsockopt, if_freenameindex, if_nameindex, if_nametoindex, setsockopt

XBD <net/if.h>

CHANGE HISTORY

First released in Issue 6. Derived from the XNS, Issue 5.2 specification.

IEEE Std 1003.1-2001/Cor 1-2002, item XSH/TC1/D6/28 is applied, changing {IFNAMSIZ} to {IF_NAMESIZ} in the DESCRIPTION.