IF_NAMETOINDEX(3P) POSIX Programmer's Manual IF_NAMETOINDEX(3P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
NAMEif_nametoindex — map a network interface name to its corresponding
unsigned if_nametoindex(const char *ifname);
The if_nametoindex() function shall return the interface index corre‐
sponding to name ifname.
The corresponding index if ifname is the name of an interface; other‐
No errors are defined.
The following sections are informative.
SEE ALSOgetsockopt(), if_freenameindex(), if_indextoname(), if_nameindex(),
The Base Definitions volume of POSIX.1‐2008, <net_if.h>
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
cal and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/online.html .
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IEEE/The Open Group 2013 IF_NAMETOINDEX(3P)