1.\" $OpenBSD: getpid.2,v 1.9 2003/06/02 20:18:39 millert Exp $ 2.\" $NetBSD: getpid.2,v 1.5 1995/02/27 12:33:12 cgd Exp $ 3.\" 4.\" Copyright (c) 1980, 1991, 1993 5.\" The Regents of the University of California. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)getpid.2 8.1 (Berkeley) 6/4/93 32.\" 33.Dd June 4, 1993 34.Dt GETPID 2 35.Os 36.Sh NAME 37.Nm getpid , 38.Nm getppid 39.Nd get parent or calling process identification 40.Sh SYNOPSIS 41.Fd #include <sys/types.h> 42.Fd #include <unistd.h> 43.Ft pid_t 44.Fn getpid void 45.Ft pid_t 46.Fn getppid void 47.Sh DESCRIPTION 48.Fn getpid 49returns the process ID of the calling process. 50Though the ID is guaranteed to be unique, it should 51.Em NOT 52be used for constructing temporary file names; see 53.Xr mkstemp 3 54instead. 55.Pp 56.Fn getppid 57returns the process ID of the parent of the calling process. 58.Sh ERRORS 59The 60.Fn getpid 61and 62.Fn getppid 63functions are always successful, and no return value is reserved to 64indicate an error. 65.Sh SEE ALSO 66.Xr gethostid 3 67.Sh STANDARDS 68.Fn getpid 69and 70.Fn getppid 71conform to 72.St -p1003.1-88 . 73