90 lines
2.6 KiB
Groff
90 lines
2.6 KiB
Groff
.\"
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.\" Copyright (c) 1995
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.\" Mark Murray. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY MARK MURRAY AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 20, 1995
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.Dt RNDCONTROL 8
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.Os FreeBSD 2
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.Sh NAME
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.Nm rndcontrol
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.Nd a utility for manipulating the /dev/random device
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.Sh SYNOPSIS
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.Nm rndcontrol
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.Op Fl q
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.Op Fl s Ar irq_no
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.Op Fl c Ar irq_no
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.Sh DESCRIPTION
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The
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.Nm
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command is used to set which interrupts are used to help randomise
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the ``pool of entropy'' maintained by the kernel. The
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.Pa /dev/random
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and
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.Pa /dev/urandom
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devices are the user interface to this source of randomness.
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Any changes take effect immediately.
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.Pp
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The following command line options are supported:
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.Bl -tag -width indent
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.It Fl q
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Turn off all output except errors.
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.It Fl s Ar n
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Allow IRQ
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.Ar n
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to be used as a source of randomness. This option may be repeated for
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more than one IRQ.
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.It Fl c Ar n
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Stop IRQ
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.Ar n
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from being used as a source of randomness. This option may be repeated for
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more than one IRQ.
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.El
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.Pp
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The default is to have no IRQ's being used.
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.Pp
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.Sh FILES
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.Bl -tag -width /dev/urandom -compact
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.It Pa /dev/random
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secure random device
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.It Pa /dev/urandom
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random device
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.El
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.Sh BUGS
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Sure to be some.
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.Sh "SEE ALSO"
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.Xr random 4
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.Sh AUTHORS
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.An Theodore Ts'o
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wrote the core code.
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.An Mark Murray
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ported this code to
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.Fx
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and wrote the support routines and constructed the man pages.
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.Sh HISTORY
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.Nm Rndcontrol
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first appeared in
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.Fx 2.1.5 .
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