if_indextoname(3p) [centos man page]

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

PROLOG

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

NAME

       if_indextoname - map a network interface index to its corresponding name

SYNOPSIS

       #include <net/if.h>

       char *if_indextoname(unsigned ifindex, char *ifname);

DESCRIPTION

       The if_indextoname() function shall map an interface index to its corresponding name.

       When this function is called, ifname shall point to a buffer of at least {IF_NAMESIZE} bytes. The function shall place in this  buffer  the
       name of the interface with index ifindex.

RETURN VALUE

       If  ifindex is an interface index, then the function shall return the value supplied in ifname, which points to a buffer now containing the
       interface name. Otherwise, the function shall return a NULL pointer and set errno to indicate the error.

ERRORS

       The if_indextoname() function shall fail if:

       ENXIO  The interface does not exist.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       getsockopt(), if_freenameindex(), if_nameindex(), 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, Standard for Information Technol-
       ogy -- 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 original Standard can  be  obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003							IF_INDEXTONAME(3P)

Check Out this Related Man Page

<net/if.h>(P)						     POSIX Programmer's Manual						     <net/if.h>(P)

NAME

       net/if.h - sockets local interfaces

SYNOPSIS

       #include <net/if.h>

DESCRIPTION

       The <net/if.h> header shall define the if_nameindex structure that includes at least the following members:

	      unsigned	if_index  Numeric index of the interface.
	      char     *if_name   Null-terminated name of the interface.

       The  <net/if.h>	header shall define the following macro for the length of a buffer containing an interface name (including the terminating
       NULL character):

       IF_NAMESIZE
	      Interface name length.

       The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.

	      unsigned		    if_nametoindex(const char *);
	      char		   *if_indextoname(unsigned, char *);
	      struct if_nameindex  *if_nameindex(void);
	      void		    if_freenameindex(struct if_nameindex *);

       The following sections are informative.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       The System Interfaces volume of IEEE Std 1003.1-2001, if_freenameindex(), if_indextoname(), if_nameindex(), if_nametoindex()

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- 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 original Standard can be obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003							     <net/if.h>(P)

Linux and UNIX Man Pages

if_indextoname(3p) [centos man page]

Check Out this Related Man Page