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.\" $OpenBSD: compat_bsdos.8,v 1.3 1999/09/16 18:28:13 aaron Exp $
.\"
.\" Copyright (c) 1997, Jason Downs. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by Jason Downs for the
.\" OpenBSD system.
.\" 4. Neither the name(s) of the author(s) nor the name OpenBSD
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
.\" DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd September 2, 1997
.Dt compat_bsdos 8
.Os
.Sh NAME
.Nm compat_bsdos
.Nd setup procedure for running BSD/OS binaries under emulation
.Sh DESCRIPTION
OpenBSD supports the execution of BSD/OS binaries; most binaries should
work, at least from the BSD/OS 2.1 era. Some things that are not currently
supported are proprietary extensions made to the BSD/OS kernel.
.Pp
To activate the BSD/OS compatibility feature, the kernel must be compiled
with the
.Nm COMPAT_BSDOS
option enabled.
.Pp
.Nm COMPAT_BSDOS
follows the standard
.Dq emul
filesystem scheme, using
.Pa /emul/bsdos
as the prefix. This means that all BSD/OS executables first look in
.Pa /emul/bsdos
whenever opening a file; configuration information, shared library images,
etc., for BSD/OS binaries should all be installed under the emulation
directory in order to avoid conflicts with native files.
.Pp
Although many commercial BSD/OS binaries are
.Dq pure
(in that they need no shared libraries), system binaries and those
compiled/linked with the
BSD/OS
.\" no .Xr here because we don't have junk like shlicc.
.Nm shlicc
program require the appropriate shared library images. These may be
found in the
.Pa /shlib
directory on a BSD/OS system, and must be copied to
.Pa /emul/bsdos/shlib
in order for such binaries to work. The user is responsible for having
the appropriate BSD/OS licenses in order to use the shared library images.
.Sh BUGS
If BSDi ever manages to port their system to more architectures or switch
to real dynamically linked libraries these instructions may have to change.
.Pp
.Nm COMPAT_BSDOS
is currently only supported on the i386.
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