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