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GETHOSTID(3)               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);

     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 an 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.

NetBSD 10.99                     March 3, 2019                    NetBSD 10.99