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+.\" Copyright (c) 1980, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)getpid.2	8.1 (Berkeley) 6/4/93
+.\" %FreeBSD: src/lib/libc/sys/getpid.2,v 1.14 2002/12/18 09:22:30 ru Exp %
+.\"
+.\" $FreeBSD$
+.Dd June 4, 1993
+.Dt GETPID 2
+.Os
+.Sh 名称
+.Nm getpid ,
+.Nm getppid
+.Nd 親または呼び出しプロセスの識別子を取得
+.Sh ライブラリ
+.Lb libc
+.Sh 書式
+.In sys/types.h
+.In unistd.h
+.Ft pid_t
+.Fn getpid void
+.Ft pid_t
+.Fn getppid void
+.Sh 解説
+.Fn getpid
+システムコールは呼び出しプロセスのプロセス ID を返します。
+ID はユニークであることが保証されていますが、
+テンポラリファイル名の作成に利用しては
+.Em いけません。
+セキュリティ上の理由については、
+.Xr mkstemp 3
+を参照してください。
+.Pp
+.Fn getppid
+システムコールは呼び出しプロセスの親のプロセス ID を返します。
+.Sh エラー
+.Fn getpid
+システムコールと
+.Fn getppid
+システムコールは必ず正常に完了するので、エラーを示すための戻り値はありません。
+.Sh 関連項目
+.Xr gethostid 3
+.Sh 規格
+.Fn getpid
+システムコールと
+.Fn getppid
+システムコールは
+.St -p1003.1-90
+に適合しています。
+.Sh 歴史
+.Fn getpid
+関数は
+.At v7
+で登場しました。