Add script for creating ramdisks at boot time, in time to be processed

by fstab.

etc/rc.d/ramdisk

@@ -0,0 +1,82 @@
+#!/bin/sh -
+#
+# Copyright (c) 2004  The FreeBSD Project
+# 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.
+#
+# $FreeBSD$
+#
+
+# PROVIDE: ramdisk
+# REQUIRE: localswap
+# BEFORE: mountcritlocal
+# KEYWORD: FreeBSD
+
+. /etc/rc.subr
+
+name="ramdisk"
+stop_cmd="ramdisk_stop"
+start_cmd="ramdisk_start"
+
+ramdisk_start()
+{
+	for unit in $ramdisk_units
+	do
+		if [ -c /dev/md$unit ] ; then
+			echo "$0: md$unit exists, skipping"
+			continue
+		fi
+		eval mdoptions=\$ramdisk_${unit}_mdoptions
+		if [ "$mdoptions" = "${mdoptions##-t}" ]
+		then
+			echo "Type not specified for md$unit"
+			continue
+		fi
+		eval fsoptions=\$ramdisk_${unit}_newfs
+		eval owner=\$ramdisk_${unit}_owner
+		eval perms=\$ramdisk_${unit}_perms
+
+		echo Configuring ramdisk /dev/md$unit
+
+		mdconfig -a $mdoptions -u $unit
+		newfs $fsoptions /dev/md$unit
+		[ "X$owner" != "X" ] && chown $owner /dev/md$unit
+		[ "X$perms" != "X" ] && chmod $perms /dev/md$unit
+	done
+}
+
+ramdisk_stop()
+{
+	for unit in $ramdisk_units
+	do
+		if [ -c /dev/md$unit ] ; then
+			umount -f /dev/md$unit > /dev/null 2>&1
+			mdconfig -d -u $unit
+			echo Recovered ramdisk /dev/md$unit
+		fi
+	done
+}
+
+load_rc_config $name
+run_rc_command "$1"
+