freebsd-dev/etc/rc.diskless2
rwatson 2880206cef o Add a comment indicating that if /tmp==/var/tmp in rc.diskless2, the
md device and file system creation occurs *after* mtree is run, and
  as such an /var/tmp/* or /tmp/* entries will be under the mountpoint
  (or fail) rather than appearing in the md filesystems.  This prevents
  the creation of vi.recover, and might affect other localizations that
  rely on the mtree calls affecting these directories.
2001-12-26 17:18:39 +00:00

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# 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 "+++ mount_md 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
echo "+++ create lastlog"
/usr/bin/touch /var/log/lastlog
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.
#
# XXX: mtree runs too early to create any directories needed in /tmp,
# so if /var/tmp == /tmp, then you don't get a vi.recover.
#
if [ ! -h /tmp ]; then
mount_md ${tmpsize:=20480} /tmp 2
chmod 01777 /tmp
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