/usr/share/ltsp/ltsp_config.d/debian-edu-config-rwbind is in debian-edu-config 1.702.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59  | echo "starting rwbind $0"
# Avoid setting these if the bind mounting is already done.
if touch /var/lib/ntp > /dev/null 2>&1; then
    :
else
    # Add these for a all edu clients
    # Make sure hald can write to the directories it is using
    rw_dirs="$rw_dirs /var/cache/hald"
    # Make sure NTP is able to update its drift file
    rw_dirs="$rw_dirs /var/lib/ntp"
    # Make sure rpc.statd can work
    copy_dirs="$copy_dirs /var/lib/nfs"
    # FIXME Note that this grep do not work when it is needed, because
    # /proc/ is not mounted yet.  The consequence is that a few more
    # bind mounts are done on thin clients, which can be ignored.
    if grep -qw 4 /proc/cmdline > dev/null 2>&1 ; then
	:
    else
	# Add these for diskless workstations
        # Make sure udev can write to the directories it is using
	rw_dirs="$rw_dirs /var/lib/dbus /media"
	# ntpd requires rw access to /var/log/ntpstats
	# WARNING: this is currently disabled as ntpd will constantly write to /var/log/ntpstats
        #          and consume diskless workstation RAM... investigating on a solution for that
	#rw_dirs="$rw_dirs /var/log/ntpstats"
	# ALSA utils tries to store asound.state here on shutdown
	rw_dirs="$rw_dirs /var/lib/alsa"
        # Make sure resolvconf can write to the directories it is using
	if [ -d /etc/resolvconf/run ] ; then
	    rw_dirs="$rw_dirs /etc/resolvconf/run"
	fi
        # Make sure GDM is able to do its config
	if [ -d /var/lib/gdm ] ; then
	    rw_dirs="$rw_dirs /var/lib/gdm"
	fi
        # Make sure rwhod can work
	rw_dirs="$rw_dirs /var/spool/rwho"
        # Make sure acpi-support installed on laptops can save the
        # files it want to save during boot
	if [ -d /var/lib/acpi-support ] ; then
	    rw_dirs="$rw_dirs /var/lib/acpi-support"
	fi
        # Make sure ifupdown can work
	rw_dirs="$rw_dirs /etc/network/run"
    fi
fi
echo "ending rwbind $0"
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