PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

IF_NAMEINDEX(3P)          POSIX Programmer's Manual         IF_NAMEINDEX(3P)

PROLOG         top

       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.

NAME         top

       if_nameindex — return all network interface names and indexes

SYNOPSIS         top

       #include <net/if.h>

       struct if_nameindex *if_nameindex(void);

DESCRIPTION         top

       The if_nameindex() function shall return an array of if_nameindex
       structures, one structure per interface. The end of the array is
       indicated by a structure with an if_index field of zero and an
       if_name field of NULL.

       Applications should call if_freenameindex() to release the memory
       that may be dynamically allocated by this function, after they have
       finished using it.

RETURN VALUE         top

       An array of structures identifying local interfaces. A null pointer
       is returned upon an error, with errno set to indicate the error.

ERRORS         top

       The if_nameindex() function may fail if:

       ENOBUFS
              Insufficient resources are available to complete the function.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       getsockopt(3p), if_freenameindex(3p), if_indextoname(3p),
       if_nametoindex(3p), setsockopt(3p)

       The Base Definitions volume of POSIX.1‐2008, net_if.h(0p)

COPYRIGHT         top

       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_NAMEINDEX(3P)

Pages that refer to this page: net_if.h(0p)if_freenameindex(3p)if_indextoname(3p)if_nametoindex(3p)