65a311fcb2
Add a MOD_QUIESCE event for modules. This should return error (EBUSY) of the module is in use. MOD_UNLOAD should now only fail if it is impossible (as opposed to inconvenient) to unload the module. Valid reasons are memory references into the module which cannot be tracked down and eliminated. When kldunloading, we abandon if MOD_UNLOAD fails, and if -force is not given, MOD_QUIESCE failing will also prevent the unload. For backwards compatibility, we treat EOPNOTSUPP from MOD_QUIESCE as success. Document that modules should return EOPNOTSUPP for unknown events.
85 lines
2.4 KiB
Groff
85 lines
2.4 KiB
Groff
.\"
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.\" Copyright (c) 1997 Doug Rabson
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.\" 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 THE AUTHOR 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 April 25, 1997
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.Dt KLDUNLOAD 8
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.Os
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.Sh NAME
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.Nm kldunload
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.Nd unload a file from the kernel
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.Sh SYNOPSIS
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.Nm
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.Op Fl f
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.Op Fl v
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.Fl i Ar id
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.Nm
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.Op Fl f
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.Op Fl v
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.Op Fl n
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.Ar name
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.Sh DESCRIPTION
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The
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.Nm
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utility unloads a file which was previously loaded with
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.Xr kldload 8 .
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.Pp
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The following options are available:
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.Bl -tag -width indentXX
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.It Fl f
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Force the unload.
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This ignores error returns to MOD_QUISCE from the module and implies
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that the module should be unloaded even if it is currently in use.
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The users are left to cope as best they can.
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.It Fl v
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Be more verbose.
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.It Fl i Ar id
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Unload the file with this ID.
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.It Fl n Ar name
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Unload the file with this name.
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.It Ar name
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Unload the file with this name.
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.El
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.Sh DIAGNOSTICS
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The
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.Nm
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utility exits with a status of 0 on success
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and with a nonzero status if an error occurs.
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.Sh SEE ALSO
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.Xr kldunload 2 ,
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.Xr kldload 8 ,
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.Xr kldstat 8
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Fx 3.0 ,
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replacing the
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.Xr lkm 4
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interface.
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.Sh AUTHORS
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.An Doug Rabson Aq dfr@FreeBSD.org
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