.\" $NetBSD: mkfifo.1,v 1.6 1997/10/19 05:11:52 lukem Exp $ .\" .\" Copyright (c) 1990, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" This code is derived from software contributed to Berkeley by .\" the Institute of Electrical and Electronics Engineers, Inc. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)mkfifo.1 8.2 (Berkeley) 1/5/94 .\" .Dd January 5, 1994 .Dt MKFIFO 1 .Os BSD 4.4 .Sh NAME .Nm mkfifo .Nd make fifos .Sh SYNOPSIS .Nm mkfifo .Op Fl m Ar mode .Ar fifo_name ... .Sh DESCRIPTION .Nm mkfifo creates the fifos requested, in the order specified. By default, the resulting fifos have mode .Li \&0666 (rw-rw-rw-), limited by the current .Xr umask 2 . .Pp The options are as follows: .Bl -tag -width Ds .It Fl m Set the file permission bits of newly-created fifos to .Ar mode , without respect to the current umask. .Pp The mode is specified as in .Xr chmod 1 . In symbolic mode strings, the .Dq + and .Dq - operators are interpreted relative to an assumed initial mode of .Dq a=rw .El .Pp .Nm mkfifo requires write permission in the parent directory. .Pp .Nm mkfifo exits with 0 if successful, and with >0 if an error occurred. .Sh LEGACY DESCRIPTION In legacy mode, the fifo's file permission bits are always limited by the current umask. .Sh SEE ALSO .Xr mkdir 1 , .Xr rm 1 , .Xr umask 1 , .Xr mkfifo 2 , .Xr umask 2 , .Xr compat 5 , .Xr mknod 8 .Sh STANDARDS The .Nm mkfifo utility is expected to be .St -p1003.2-92 compliant. .Sh HISTORY .Nm mkfifo command appeared in .Bx 4.4 .