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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
IF_INDEXTONAME(3P) POSIX Programmer's Manual IF_INDEXTONAME(3P)
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.
if_indextoname — map a network interface index to its corresponding
name
#include <net/if.h>
char *if_indextoname(unsigned ifindex, char *ifname);
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.
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.
The if_indextoname() function shall fail if:
ENXIO The interface does not exist.
The following sections are informative.
None.
None.
None.
None.
getsockopt(3p), if_freenameindex(3p), if_nameindex(3p),
if_nametoindex(3p), setsockopt(3p)
The Base Definitions volume of POSIX.1‐2008, net_if.h(0p)
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 Electrical 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 .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the
source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 IF_INDEXTONAME(3P)
Pages that refer to this page: net_if.h(0p), if_freenameindex(3p), if_nameindex(3p), if_nametoindex(3p)