1.\" $OpenBSD: mkfifo.1,v 1.13 2010/09/03 10:08:22 jmc Exp $ 2.\" $NetBSD: mkfifo.1,v 1.4 1994/12/23 07:16:54 jtc Exp $ 3.\" 4.\" Copyright (c) 1990, 1993 5.\" The Regents of the University of California. All rights reserved. 6.\" 7.\" This code is derived from software contributed to Berkeley by 8.\" the Institute of Electrical and Electronics Engineers, Inc. 9.\" 10.\" Redistribution and use in source and binary forms, with or without 11.\" modification, are permitted provided that the following conditions 12.\" are met: 13.\" 1. Redistributions of source code must retain the above copyright 14.\" notice, this list of conditions and the following disclaimer. 15.\" 2. Redistributions in binary form must reproduce the above copyright 16.\" notice, this list of conditions and the following disclaimer in the 17.\" documentation and/or other materials provided with the distribution. 18.\" 3. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)mkfifo.1 8.2 (Berkeley) 1/5/94 35.\" 36.Dd $Mdocdate: September 3 2010 $ 37.Dt MKFIFO 1 38.Os 39.Sh NAME 40.Nm mkfifo 41.Nd make FIFOs 42.Sh SYNOPSIS 43.Nm mkfifo 44.Op Fl m Ar mode 45.Ar fifo_name ... 46.Sh DESCRIPTION 47.Nm mkfifo 48creates the FIFOs requested, in the order specified, 49using mode 0666 50modified by the current 51.Xr umask 2 . 52It requires write permission in the parent directory. 53.Pp 54The options are as follows: 55.Bl -tag -width Ds 56.It Fl m Ar mode 57Set the file permission bits of newly created FIFOs to 58.Ar mode . 59The mode argument can be in any of the formats specified to the 60.Xr chmod 1 61utility. 62If a symbolic mode is specified, the operators 63.Ql + 64and 65.Ql - 66are interpreted relative to an initial mode of 67.Dq a=rw . 68.El 69.Sh EXIT STATUS 70.Ex -std mkfifo 71.Sh SEE ALSO 72.Xr mkdir 1 , 73.Xr rm 1 , 74.Xr mkfifo 2 , 75.Xr mknod 8 76.Sh STANDARDS 77The 78.Nm 79utility is compliant with the 80.St -p1003.1-2008 81specification. 82.Sh HISTORY 83The 84.Nm 85command appeared in 86.Bx 4.4 . 87