NAME
gethostid,
sethostid —
get/set unique identifier of current
host
SYNOPSIS
#include
<unistd.h>
long
gethostid(void);
int
sethostid(long
hostid);
DESCRIPTION
The
sethostid()
function establishes a 32-bit identifier for the current processor that is
intended to be unique among all UNIX systems in existence. This is normally
a DARPA Internet address for the local machine. This call is allowed only to
the superuser and is normally performed at boot-time.
gethostid()
returns the 32-bit identifier for the current processor.
This function has been deprecated. The hostid should be set or retrieved by use of sysctl(3).
SEE ALSO
HISTORY
The gethostid() and
sethostid() system calls first appeared in
4.1cBSD and were dropped in
4.4BSD.
BUGS
32 bits for the identifier is too small.