The Open Group Base Specifications Issue 6
IEEE Std 1003.1-2001
Copyright © 2001 The IEEE and The Open Group, All Rights reserved.

NAME

if_nametoindex - map a network interface name to its corresponding index

SYNOPSIS

#include <net/if.h>

unsigned if_nametoindex(const char *ifname);

DESCRIPTION

The if_nametoindex() function shall return the interface index corresponding to name ifname.

RETURN VALUE

The corresponding index if ifname is the name of an interface; otherwise, zero.

ERRORS

No errors are defined.

The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

getsockopt() , if_freenameindex() , if_indextoname() , if_nameindex() , setsockopt() , the Base Definitions volume of IEEE Std 1003.1-2001, <net/if.h>

CHANGE HISTORY

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

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