.\"	$OpenBSD: getpid.2,v 1.11 2007/05/31 19:19:32 jmc Exp $
.\"	$NetBSD: getpid.2,v 1.5 1995/02/27 12:33:12 cgd Exp $
.\"
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.\"     @(#)getpid.2	8.1 (Berkeley) 6/4/93
.\"
.Dd $Mdocdate: May 31 2007 $
.Dt GETPID 2
.Os
.Sh NAME
.Nm getpid ,
.Nm getppid
.Nd get parent or calling process identification
.Sh SYNOPSIS
.Fd #include <sys/types.h>
.Fd #include <unistd.h>
.Ft pid_t
.Fn getpid void
.Ft pid_t
.Fn getppid void
.Sh DESCRIPTION
.Fn getpid
returns the process ID of the calling process.
Though the ID is guaranteed to be unique, it should
.Em NOT
be used for constructing temporary file names; see
.Xr mkstemp 3
instead.
.Pp
.Fn getppid
returns the process ID of the parent of the calling process.
.Sh RETURN VALUES
These functions are always successful, and no return value is
reserved to indicate an error.
.Sh SEE ALSO
.Xr gethostid 3
.Sh STANDARDS
.Fn getpid
and
.Fn getppid
conform to
.St -p1003.1-88 .