GETHOSTID(3) BSD Library Functions Manual GETHOSTID(3)

NAME
     ggeetthhoossttiidd, sseetthhoossttiidd - get/set unique identifier of current host

LLIIBBRRAARRYY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##iinncclluuddee <>

     long
     ggeetthhoossttiidd(void);

     void
     sseetthhoossttiidd(long hostid);

DESCRIPTION
     The sseetthhoossttiidd() function 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 super-user and is normally performed at
     boot time.

     The ggeetthhoossttiidd() 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)

BUGS
     32 bits for the identifier is too small.

HISTORY     The ggeetthhoossttiidd() and sseetthhoossttiidd() syscalls appeared in 4.2BSD and were
     dropped in 4.4BSD.

BSD                              June 2, 1993                              BSD