Import the new linux(4) manual page, which will be useful when the

linux(8) utility and manual page go away.

2 files changed, 126 insertions, 1 deletions

diff --git a/share/man/man4/man4.i386/Makefile b/share/man/man4/man4.i386/Makefile
index 06026b5..3ade99a 100644
--- a/share/man/man4/man4.i386/Makefile
+++ b/share/man/man4/man4.i386/Makefile
@@ -3,7 +3,7 @@
 MAN4=	aic.4 alpm.4 apm.4 ar.4 asc.4 \
 	cs.4 cx.4 cy.4 \
 	dgb.4 el.4 en.4 ep.4 ex.4 fe.4 gsc.4 \
-	ie.4 io.4 labpc.4 le.4 lnc.4 matcd.4 mcd.4 \
+	ie.4 io.4 labpc.4 le.4 linux.4 lnc.4 matcd.4 mcd.4 \
 	meteor.4 mse.4 npx.4 \
 	pcf.4 perfmon.4 pnp.4 \
 	rdp.4 sb.4 scd.4 \
@@ -30,6 +30,7 @@ MLINKS+=	ie.4 ../ie.4
 MLINKS+=	io.4 ../io.4
 MLINKS+=	labpc.4 ../labpc.4
 MLINKS+=	le.4 ../le.4
+MLINKS+=	linux.4 ../linux.4
 MLINKS+=	lnc.4 ../lnc.4
 MLINKS+=	matcd.4 ../matcd.4
 MLINKS+=	mcd.4 ../mcd.4
diff --git a/share/man/man4/man4.i386/linux.4 b/share/man/man4/man4.i386/linux.4
new file mode 100644
index 0000000..f37bce7
--- /dev/null
+++ b/share/man/man4/man4.i386/linux.4
@@ -0,0 +1,124 @@
+.\" Copyright (c) 2000 Sheldon Hearn
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+.\"
+.\" $FreeBSD$
+.Dd August 17, 2000
+.Dt LINUX 4 i386
+.Os
+.Sh NAME
+.Nm linux
+.Nd Linux ABI support
+.Sh SYNOPSIS
+To link Linux ABI support into the kernel:
+.Cd options 	COMPAT_LINUX
+.Pp
+To load the Linux ABI support kernel module:
+.Dl kldload linux
+.Sh DESCRIPTION
+The
+.Nm
+module provides limited
+Linux ABI (application binary interface) compatibility
+for userland applications.
+The module provides the following significant facilities:
+.Bl -bullet
+.It
+An image activator
+for correctly branded
+.Xr elf 5
+executable images
+.It
+Special signal handling for activated images
+.It
+Linux to native system call vector redirection
+.El
+.Pp
+It is important to note that the Linux ABI support
+it not provided through an emulator.
+Rather, a true (albeit limited) ABI implementation is provided.
+.Pp
+The following
+.Xr sysctl 8
+tunable variables are available:
+.Bl -tag -width compat.linux.oss_version
+.It compat.linux.osname
+Linux kernel operating system name.
+.It compat.linux.osrelease
+Linux kernel operating system release.
+.It compat.linux.oss_version
+Linux Open Sound System version.
+.El
+.Pp
+The
+.Nm
+module can be linked into the kernel statically with the
+.Dv COMPAT_LINUX
+kernel configuration option
+or loaded as required.
+The following command will load the module
+if it is neither linked into the kernel
+nor already loaded as a module:
+.Bd -literal -offset indent
+if ! kldstat -v | grep -E 'linux(aout|elf)' > /dev/null; then
+	kldload linux > /dev/null 2>&1
+fi
+.Ed
+.Pp
+Note that dynamically linked Linux executables
+will require a suitable environment in
+.Pa /compat/linux .
+Specifically, the Linux run-time linker's hints files
+should be correctly initialized.
+For this reason, it is common to execute the following commands
+to prepare the system to correctly run Linux executables:
+.Bd -literal -offset indent
+if [ -x /compat/linux/sbin/ldconfig ]; then
+	/compat/linux/sbin/ldconfig
+fi
+.Ed
+.Pp
+For information on loading the
+.Nm
+kernel loadable module automatically on system startup,
+see
+.Xr rc.conf 5 .
+This information applies
+regardless of whether the
+.Nm
+module is statically linked into the kernel
+or loaded as a module.
+.Sh FILES
+.Bl -tag -width /compat/linux/proc -compact
+.It Pa /compat/linux
+minimal Linux run-time environment
+.It Pa /compat/linux/proc
+limited Linux process file system
+.El
+.Sh SEE ALSO
+.Xr brandelf 1 ,
+.Xr elf 5 ,
+.Xr linprocfs
+.Sh HISTORY
+Linux ABI support first appeared in
+.Fx 2.1 .