if_nametoindex

       index

SYNOPSIS
       #include <net/if.h>

       unsigned if_nametoindex(const char *ifname);


DESCRIPTION
       The if_nametoindex() function shall return the interface  index  corre-
       sponding to name ifname.

RETURN VALUE
       The  corresponding  index if ifname is the name of an interface; other-
       wise, 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>

COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard
       is  the  referee document. The original Standard can be obtained online
       at http://www.opengroup.org/unix/online.html .



IEEE/The Open Group                  2003                    IF_NAMETOINDEX(P)