ultrix man page for gethostid

gethostid(2)							System Calls Manual						      gethostid(2)

Name
       gethostid, sethostid - get or set the unique identifier of the current host

Syntax
       hostid = gethostid()
       int hostid;

       sethostid(hostid)
       int hostid;

Description
       The  system  call  establishes  a 32-bit identifier for the current processor that is intended to be unique among all UNIX systems in exis-
       tence.  This is normally a DARPA Internet address for the local machine.  This call is allowed only to the superuser and is  normally  per-
       formed at boot time.

Return Values
       The system call returns the 32-bit identifier for the current processor.

See Also
       hostid(1), gethostname(2)

																      gethostid(2)