1.\" 2.\" Copyright (C) 1994 by Joerg Wunsch, Dresden 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY 15.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 19.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 20.\" OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 21.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 22.\" LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 24.\" USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 25.\" DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" 29.Dd May 22, 1994 30.Os 31.Dt FDCONTROL 8 32.Sh NAME 33.Nm fdcontrol 34.Nd modify floppy disk parameters 35.Sh SYNOPSIS 36.Nm fdcontrol 37.Op Fl d Ar 0|1 38.Ar device 39.Nm fdcontrol 40.Op Fl s 41.Ar device 42.Sh DESCRIPTION 43.Nm Fdcontrol 44allows the modification of the run-time behavior of the floppy 45disk device specified by 46.Ar device . 47.Ar Device 48should be a character device. 49.Pp 50.Nm Fdcontrol 51currently supports the specification of device parameters for the 52floppy disk drive 53.Po 54.Fl s , 55also default mode 56.Pc , 57or it allows the modification of the driver debug level, in case the 58floppy driver has been compiled into the kernel with the 59.Em DEBUG 60option set 61.Pq Fl d . 62.Pp 63Since the implications of such actions are considered harmful, the 64underlying 65.Xr ioctl 2 66command is restricted to the super-user. 67.Pp 68When requesting a new parameter specification, the command asks the 69user for each individual tunable parameter, defaulting to the 70currently used value. 71.Sh DIAGNOSTICS 72Error codes for the underlying 73.Xr ioctl 2 74commands are printed by the 75.Xr perror 3 76facility. 77.Sh BUGS 78The 79.Nm 80command is currently under development. It's user interface is rather 81silly and likely to change in future, options should be provided to 82allow anything being modified from the command line. 83.Pp 84The driver does actually support only two debug levels 85.Pq 0 and 1 , 86where debug level 1 will generate huge amounts of output. It is likely 87to overflow the syslog if not used with extreme care. 88.Sh SEE ALSO 89.Xr ioctl 2 , 90.Xr perror 3 , 91.Xr fdc 4 92.Sh HISTORY 93.Nm Fdcontrol 94is currently under development. It's user interface and overall 95functionality are subjects to future improvements and changes. 96.Sh AUTHORS 97The program has been contributed by 98.if n Joerg Wunsch, 99.if t J\(:org Wunsch, 100Dresden. 101