1.\" Copyright (c) 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the Institute of Electrical and Electronics Engineers, Inc. 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.\" @(#)mkfifo.1 8.2 (Berkeley) 1/5/94 32.\" $FreeBSD$ 33.\" 34.Dd January 5, 1994 35.Dt MKFIFO 1 36.Os 37.Sh NAME 38.Nm mkfifo 39.Nd make fifos 40.Sh SYNOPSIS 41.Nm 42.Op Fl m Ar mode 43.Ar fifo_name ... 44.Sh DESCRIPTION 45The 46.Nm 47utility creates the fifos requested, in the order specified. 48.Pp 49The options are as follows: 50.Bl -tag -width indent 51.It Fl m 52Set the file permission bits of the created fifos to the 53specified mode, ignoring the 54.Xr umask 2 55of the calling process. 56The 57.Ar mode 58argument takes any format that can be specified to the 59.Xr chmod 1 60command. 61If a symbolic mode is specified, the op symbols 62.Ql + 63(plus) and 64.Ql - 65(hyphen) are interpreted relative to an assumed initial mode of 66.Dq Li a=rw 67(read and write permissions for all). 68.El 69.Pp 70If the 71.Fl m 72option is not specified, fifos are created with mode 73.Li 0666 74modified by the 75.Xr umask 2 76of the calling process. 77The 78.Nm 79utility requires write permission in the parent directory. 80.Sh EXIT STATUS 81.Ex -std 82.Sh SEE ALSO 83.Xr mkdir 1 , 84.Xr rm 1 , 85.Xr mkfifo 2 , 86.Xr mknod 2 , 87.Xr mknod 8 88.Sh STANDARDS 89The 90.Nm 91utility is expected to be 92.St -p1003.2 93compliant. 94.Sh HISTORY 95The 96.Nm 97command appeared in 98.Bx 4.4 . 99