xref: /freebsd/usr.sbin/fdcontrol/fdcontrol.8 (revision 7f3dea244c40159a41ab22da77a434d7c5b5e85a)
1.\"
2.\" Copyright (C) 1994 by Joerg Wunsch, Dresden
3.\" All rights reserved.
4.\"
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27.\"     $Id$
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