freebsd-dev/etc/rc.diskless2

# Copyright (c) 1999  Matt Dillon
# 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.
#
# $FreeBSD$
#

#
# rc.diskless2
#

# Provide a function for normalizing the mounting of memory
# filesystems.  This should allow the rest of the code here to remain
# as close as possible between 5-current and 4-stable.
#   $1 = size
#   $2 = mount point
#   $3 = md unit number (ignored in pre 5.0 systems)
#   $4 = (optional) bytes-per-inode
mount_md() {
	if [ -n "$4" ]; then
		bpi="-i $4"
	fi
	/sbin/mdconfig -a -t malloc -s $1 -u $3
	/sbin/disklabel -r -w md$3 auto
	/sbin/newfs $bpi /dev/md$3c
	/sbin/mount /dev/md$3c $2
}

# If there is a global system configuration file, suck it in.
#
if [ -r /etc/defaults/rc.conf ]; then
	. /etc/defaults/rc.conf
	source_rc_confs
elif [ -r /etc/rc.conf ]; then
	. /etc/rc.conf
fi

echo "+++ mfs_mount of /var"
mount_md ${varsize:=65536} /var 1

echo "+++ populate /var using /etc/mtree/BSD.var.dist"
/usr/sbin/mtree -deU -f /etc/mtree/BSD.var.dist -p /var

echo "+++ create log files based on the contents of /etc/newsyslog.conf"
LOGFILES=`/usr/bin/awk '$1 != "#" { printf "%s ", $1 } ' /etc/newsyslog.conf`
if [ -n "$LOGFILES" ]; then
	/usr/bin/touch $LOGFILES
fi

mount -a       # chown and chgrp are in /usr

#
# XXX make sure to create one dir for each printer as requested by lpd
#

# If /tmp is a symlink, assume it points to somewhere writable, like
# /var/tmp, otherwise, use a small memory filesystem for /tmp.
if [ ! -h /tmp ]; then
	mount_md ${tmpsize:=20480} /tmp 2
fi

if sysctl vfs.devfs.generation > /dev/null 2>&1 ; then
	# we have DEVFS, no worries...
	true
else
	# extract a list of device entries, then copy them to a writable fs
	(cd /; find -x dev | cpio -o -H newc) > /tmp/dev.tmp
	mount_md 4096 /dev 3 512
	(cd /; cpio -i -H newc -d < /tmp/dev.tmp)
fi