Man Pages

if_nameindex(3p) - phpMan if_nameindex(3p) - phpMan

Command: man perldoc info search(apropos)  


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



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may dif-
       fer (consult the corresponding Linux manual page for details of Linux behavior), or the interface  may  not  be
       implemented on Linux.

NAME
       if_nameindex - return all network interface names and indexes

SYNOPSIS
       #include <net/if.h>

       struct if_nameindex *if_nameindex(void);


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

ERRORS
       The if_nameindex() function may fail if:

       ENOBUFS
              Insufficient resources are available to complete the function.


       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       getsockopt(), if_freenameindex(), if_indextoname(), if_nametoindex(), 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, Stan-
       dard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base  Specifica-
       tions  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 Stan-
       dard,  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_NAMEINDEX(3P)