1.\" Copyright (c) 2004 Roland Smith <rsmith@xs4all.nl> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.Dd May 25, 2019 26.Dt DEVFS.CONF 5 27.Os 28.Sh NAME 29.Nm devfs.conf 30.Nd boot-time devfs configuration information 31.Sh DESCRIPTION 32The 33.Nm 34file provides an easy way to set ownership and permissions, or create 35links for devices available at boot. 36.Pp 37It does not work for devices plugged in and out after the system is up 38and running, e.g.\& USB devices. 39See 40.Xr devfs.rules 5 41for setting ownership and permissions for all device nodes, and 42.Xr devd.conf 5 43for actions to be taken when devices are attached or detached. 44.Pp 45Lines starting with a hash sign 46.Pq Ql # 47and empty lines are ignored. 48The lines that specify 49.Nm 50rules consist of three parameters separated by whitespace: 51.Bl -tag -width indent 52.It Ar action 53The action to take for the device. 54The action names are only significant to the first unique character. 55.It Ar devname 56The name of the device created by 57.Xr devfs 4 . 58.It Ar arg 59The argument of the 60.Ar action . 61.El 62.Pp 63The actions currently supported are: 64.Bl -tag -width indent 65.It Ic link 66This action creates a symbolic link named 67.Ar arg 68that points to 69.Ar devname , 70the name of the device created by 71.Xr devfs 4 . 72.It Ic own 73This action changes the ownership of 74.Ar devname . 75The 76.Ar arg 77parameter must be in the form of an 78.Ar owner Ns : Ns Ar group 79pair, in the same format used by 80.Xr chown 8 . 81.It Ic perm 82This action changes the permissions of 83.Ar devname . 84The 85.Ar arg 86parameter must be a 87.Ar mode 88as explained in 89.Xr chmod 1 . 90.El 91.Sh FILES 92.Bl -tag -compact -width Pa 93.It Pa /etc/devfs.conf 94.It Pa /usr/share/examples/etc/devfs.conf 95.El 96.Sh EXAMPLES 97To create a 98.Pa /dev/cdrom 99link that points to the first CD-ROM, 100the following may be added to 101.Nm : 102.Bd -literal -offset indent 103link cd0 cdrom 104.Ed 105.Pp 106To set the owner of a device, the 107.Ic own 108action may be specified: 109.Bd -literal -offset indent 110own cd0 root:cdrom 111.Ed 112.Pp 113To set the permissions of a device, a 114.Ic perm 115action should be used: 116.Bd -literal -offset indent 117perm cd0 0660 118.Ed 119.Sh SEE ALSO 120.Xr chmod 1 , 121.Xr devfs 4 , 122.Xr devd.conf 5 , 123.Xr devfs.rules 5 , 124.Xr chown 8 125.Sh AUTHORS 126This manual page was written by 127.An Roland Smith Aq Mt rsmith@xs4all.nl . 128