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.\" 38.Dd January 5, 1994 39.Dt MKFIFO 1 40.Os 41.Sh NAME 42.Nm mkfifo 43.Nd make fifos 44.Sh SYNOPSIS 45.Nm 46.Op Fl m Ar mode 47.Ar fifo_name ... 48.Sh DESCRIPTION 49The 50.Nm 51utility creates the fifos requested, in the order specified. 52.Pp 53The options are as follows: 54.Bl -tag -width indent 55.It Fl m 56Set the file permission bits of the created fifos to the 57specified mode, ignoring the 58.Xr umask 2 59of the calling process. 60The mode argument takes any format that can be specified to the 61.Xr chmod 1 62command. 63If a symbolic mode is specified, the op symbols 64.Dq + 65(plus) and 66.Dq - 67(hyphen) are interpreted relative to an assumed initial mode of 68.Dq a=rw 69(read and write permissions for all). 70.El 71.Pp 72If the 73.Fl m 74option is not specified, fifos are created with mode 75.Li \&0666 76modified by the 77.Xr umask 2 78of the calling process. 79The 80.Nm 81utility requires write permission in the parent directory. 82.Sh DIAGNOSTICS 83.Ex -std 84.Sh STANDARDS 85The 86.Nm 87utility is expected to be 88.St -p1003.2 89compliant. 90.Sh SEE ALSO 91.Xr mkdir 1 , 92.Xr rm 1 , 93.Xr mkfifo 2 , 94.Xr mknod 2 , 95.Xr mknod 8 96.Sh HISTORY 97The 98.Nm 99command appeared in 100.Bx 4.4 . 101