NAME
gethostid,
sethostid —
get/set unique identifier of current
host
LIBRARY
library “libc”
SYNOPSIS
#include
<unistd.h>
long
gethostid(void);
void
sethostid(long
hostid);
DESCRIPTION
Thesethostid()
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
super-user and is normally performed at boot time.
The
gethostid()
function 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() syscalls appeared in
4.2BSD and were dropped in
4.4BSD.
BUGS
32 bits for the identifier is too small.