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