NAME
gethostid,
sethostid —
get/set unique identifier of current host
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
long
gethostid(
void);
int
sethostid(
long
hostid);
DESCRIPTION
sethostid() 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.
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
gethostname(3),
sysctl(3),
sysctl(8)
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.