1.\" $NetBSD: mkfifo.1,v 1.13 2017/07/04 07:03:32 wiz Exp $ 2.\" 3.\" Copyright (c) 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" the Institute of Electrical and Electronics Engineers, Inc. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. Neither the name of the University nor the names of its contributors 18.\" may be used to endorse or promote products derived from this software 19.\" without specific prior written permission. 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.\" @(#)mkfifo.1 8.2 (Berkeley) 1/5/94 34.\" 35.Dd January 5, 1994 36.Dt MKFIFO 1 37.Os 38.Sh NAME 39.Nm mkfifo 40.Nd make fifos 41.Sh SYNOPSIS 42.Nm 43.Op Fl m Ar mode 44.Ar fifo_name ... 45.Sh DESCRIPTION 46.Nm 47creates the fifos requested, in the order specified, 48using mode 49.Li \&0666 50modified by the current 51.Xr umask 2 . 52.Pp 53The options are as follows: 54.Bl -tag -width Ds 55.It Fl m 56Set the file permission bits of newly-created fifos to 57.Ar mode . 58The mode is specified as in 59.Xr chmod 1 . 60In symbolic mode strings, the 61.Dq + 62and 63.Dq - 64operators are interpreted relative to an assumed initial mode of 65.Dq a=rw 66.El 67.Pp 68.Nm 69requires write permission in the parent directory. 70.Sh EXIT STATUS 71.Ex -std 72.Sh SEE ALSO 73.Xr mkdir 1 , 74.Xr rm 1 , 75.Xr mkfifo 2 , 76.Xr mknod 8 77.Sh STANDARDS 78The 79.Nm 80utility is expected to be 81.St -p1003.2-92 82compliant. 83.Sh HISTORY 84.Nm 85command appeared in 86.Bx 4.4 . 87