xref: /freebsd/libexec/rc/rc.d/tmp (revision f99f0ee14e3af81c23150a6a340259ca8a33d01a)

#!/bin/sh
#
# 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.
#
#

# PROVIDE: tmp
# REQUIRE: mountcritlocal

. /etc/rc.subr

name="tmp"
desc="Configure tmpfs"
stop_cmd=':'

load_rc_config $name

# doesn't make sense to run in a svcj: mounting
tmp_svcj="NO"

mount_tmpmfs()
{
	while read line; do
		case $line in
		/dev/md[0-9]*\ /tmp)
			return;;
		esac
	done <<*EOF
$(df /tmp)
*EOF
	mount_md ${tmpsize} /tmp "${tmpmfs_flags}"
	chmod 01777 /tmp
}

# If we do not have a writable /tmp, create a memory
# filesystem for /tmp.  If /tmp is a symlink (e.g. to /var/tmp,
# then it should already be writable).
#
case "${tmpmfs}" in
[Aa][Uu][Tt][Oo])
	_tmpdir=/tmp/.diskless.$(dd if=/dev/random bs=32 count=1 status=none | sha256)
	if mkdir -m 0700 ${_tmpdir}; then
		rmdir ${_tmpdir}
	else
		if [ -h /tmp ]; then
			echo "*** /tmp is a symlink to a non-writable area!"
			echo "dropping into shell, ^D to continue anyway."
			/bin/sh
		else
			mount_tmpmfs
		fi
	fi
	;;
*)
	if checkyesno tmpmfs; then
		mount_tmpmfs
	fi
	;;
esac