gethostid(2) [bsd man page]

GETHOSTID(2)							System Calls Manual						      GETHOSTID(2)

NAME

       gethostid, sethostid - get/set unique identifier of current host

SYNOPSIS

       hostid = gethostid()
       long hostid;

       sethostid(hostid)
       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.

SEE ALSO

       hostid(1), gethostname(2)

BUGS

       32 bits for the identifier is too small.

4.2 Berkeley Distribution					 November 28, 1985						      GETHOSTID(2)

GETHOSTID(2)						     Linux Programmer's Manual						      GETHOSTID(2)

NAME

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

SYNOPSIS

       #include <unistd.h>

       long gethostid(void);
       int sethostid(long hostid);

DESCRIPTION

       Get  or	set  a unique 32-bit identifier for the current machine.  The 32-bit identifier is intended to be unique among all UNIX systems in
       existence. This normally resembles the Internet address for the local machine, as returned by  gethostbyname(3),  and  thus  usually  never
       needs to be set.

       The sethostid call is restricted to the superuser.

       The hostid argument is stored in the file /etc/hostid.

RETURN VALUE

       gethostid returns the 32-bit identifier for the current host as set by sethostid(2).

CONFORMING TO

       4.2BSD.	 These	functions  were  dropped  in  4.4BSD.	POSIX.1  does not define these functions, but ISO/IEC 9945-1:1990 mentions them in
       B.4.4.1.  SVr4 includes gethostid but not sethostid.

FILES

       /etc/hostid

SEE ALSO

       hostid(1), gethostbyname(3)

Linux 0.99.13							    1993-11-29							      GETHOSTID(2)