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GETHOSTID(3) FreeBSD Library Functions Manual GETHOSTID(3)
NAME
gethostid, sethostid - get/set unique identifier of current host
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
long
gethostid(void);
void
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 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
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.
FreeBSD 14.0-RELEASE-p11 June 2, 1993 FreeBSD 14.0-RELEASE-p11