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. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by the University of 18.\" California, Berkeley and its contributors. 19.\" 4. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)mkfifo.1 8.2 (Berkeley) 1/5/94 36.\" $FreeBSD: src/usr.bin/mkfifo/mkfifo.1,v 1.6.2.4 2002/06/21 15:28:15 charnier Exp $ 37.\" $DragonFly: src/usr.bin/mkfifo/mkfifo.1,v 1.3 2006/02/17 19:39:09 swildner Exp $ 38.\" 39.Dd January 5, 1994 40.Dt MKFIFO 1 41.Os 42.Sh NAME 43.Nm mkfifo 44.Nd make fifos 45.Sh SYNOPSIS 46.Nm 47.Op Fl m Ar mode 48.Ar fifo_name ... 49.Sh DESCRIPTION 50The 51.Nm 52utility creates the fifos requested, in the order specified. 53.Pp 54The options are as follows: 55.Bl -tag -width indent 56.It Fl m 57Set the file permission bits of the created fifos to the 58specified mode, ignoring the 59.Xr umask 2 60of the calling process. 61The mode argument takes any format that can be specified to the 62.Xr chmod 1 63command. 64If a symbolic mode is specified, the op symbols 65.Dq + 66(plus) and 67.Dq - 68(hyphen) are interpreted relative to an assumed initial mode of 69.Dq a=rw 70(read and write permissions for all). 71.El 72.Pp 73If the 74.Fl m 75option is not specified, fifos are created with mode 76.Li \&0666 77modified by the 78.Xr umask 2 79of the calling process. 80The 81.Nm 82utility requires write permission in the parent directory. 83.Sh EXIT STATUS 84.Ex -std 85.Sh SEE ALSO 86.Xr mkdir 1 , 87.Xr rm 1 , 88.Xr mkfifo 2 , 89.Xr mknod 2 , 90.Xr mknod 8 91.Sh STANDARDS 92The 93.Nm 94utility is expected to be 95.St -p1003.2 96compliant. 97.Sh HISTORY 98The 99.Nm 100command appeared in 101.Bx 4.4 . 102