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.\"     @(#)getpid.2	8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
.Dd June 4, 1993
.Dt GETPID 2
.Os BSD 4
.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.
The ID is guaranteed to be unique and is
useful for constructing temporary file names.
.Pp
.Fn Getppid
returns the process ID of the parent
of the calling process. 
.Sh ERRORS
The
.Fn getpid
and
.Fn getppid
functions are always successful, and no return value is reserved to
indicate an error.
.Sh SEE ALSO
.Xr gethostid 3
.Sh STANDARDS
The
.Fn getpid
and
.Fn getppid
function calls are expected to conform to 
.St -p1003.1-90 .
.Sh HISTORY
A
.Fn getpid
function call appeared in
.At v7 .