The Open Group Base Specifications Issue 6
IEEE Std 1003.1-2001
Copyright © 2001 The IEEE and The Open Group, All Rights reserved.

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>

CHANGE HISTORY

First released in Issue 6. Derived from the XNS, Issue 5.2 specification.

End of informative text.
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