Linux 2.6 - man page for if_nameindex (linux section 3posix)
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IF_NAMEINDEX(P) POSIX Programmer's Manual IF_NAMEINDEX(P)
if_nameindex - return all network interface names and indexes
struct if_nameindex *if_nameindex(void);
The if_nameindex() function shall return an array of if_nameindex structures, one struc-
ture 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.
An array of structures identifying local interfaces. A NULL pointer is returned upon an
error, with errno set to indicate the error.
The if_nameindex() function may fail if:
Insufficient resources are available to complete the function.
The following sections are informative.
getsockopt() , if_freenameindex() , if_indextoname() , if_nametoindex() , setsockopt() ,
the Base Definitions volume of IEEE Std 1003.1-2001, <net/if.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications 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
Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 IF_NAMEINDEX(P)
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