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.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
getsockopt(3), if_freenameindex(3), if_nameindex(3), if_nametoindex(3), setsockopt(3)
XBD <net/if.h>
CHANGE HISTORY
First released in Issue 6. Derived from the XNS, Issue 5.2 specification.
IEEE Std 1003.1-2001 (“POSIX.1”)/Cor 1-2002, item XSH/TC1/D6/28 is applied, changing {IFNAMSIZ} to {IF_NAMESIZ} in the DESCRIPTION.