NetBSD/etc/rc.d/perusertmp

#!/bin/sh
#
# $NetBSD: perusertmp,v 1.8 2015/07/03 18:36:54 dholland Exp $
#

# PROVIDE: perusertmp
# REQUIRE: mountall
# BEFORE:  cleartmp

$_rc_subr_loaded . /etc/rc.subr

name="perusertmp"
rcvar="per_user_tmp"
start_cmd="perusertmp_start"
stop_cmd=":"

perusertmp_start()
{
	echo "Preparing per-user /tmp."

	# If /tmp is a mount point, we can't do anything.
	if [ -d "/tmp" ]; then
		local mount_point

		mount_point=$(cd /tmp && /bin/df . | /usr/bin/tail -1 | /usr/bin/awk '{print $6}')
		if [ "${mount_point}" = "/tmp" ]; then
			echo "WARNING: /tmp is mounted."
			exit 1
		fi
	fi

	# Enable magic symlinks.
	/sbin/sysctl -qw vfs.generic.magiclinks=1

	# Fixup real temporary directory.
	if [ ! -d ${per_user_tmp_dir} ]; then
		/bin/mkdir -p ${per_user_tmp_dir}
	fi
	/sbin/chown root:wheel ${per_user_tmp_dir}
	/bin/chmod 0555 ${per_user_tmp_dir}

	# Create magic link for /tmp.
	if [ "$(/usr/bin/readlink /tmp)" != ${per_user_tmp_dir}/@ruid ]; then
		/bin/rm -rf /tmp
		/bin/ln -s ${per_user_tmp_dir}/@ruid /tmp
	fi
}

load_rc_config $name
run_rc_command "$1"