gethostid - phpMan

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 identi-
       fier is intended to be unique among all UNIX systems in  existence.  This  normally
       resembles  the  Internet  address  for the local machine, as returned by gethostby-
       name(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  geth-
       ostid but not sethostid.

FILES
       /etc/hostid

SEE ALSO
       hostid(1), gethostbyname(3)



Linux 0.99.13                     1993-11-29                      GETHOSTID(2)

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