Section: POSIX Programmer's Manual (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.
--- return all network interface names and indexes
struct if_nameindex *if_nameindex(void);
function shall return an array of
structures, one structure per interface. The end of the array is
indicated by a structure with an
field of zero and an
field of NULL.
Applications should call
to release the memory that may be dynamically allocated by this
function, after they have finished using it.
An array of structures identifying local interfaces. A null pointer is
returned upon an error, with
set to indicate the error.
function may fail if:
Insufficient resources are available to complete the function.
The following sections are informative.
The Base Definitions volume of POSIX.1-2017,
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1-2017, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, 2018 Edition,
Copyright (C) 2018 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
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