| Subject: init.d: add support for read-only rootfs |
| |
| Upstream-Status: Inappropriate [oe specific] |
| |
| Signed-off-by: Chen Qi <Qi.Chen@windriver.com> |
| --- |
| init.d | 40 ++++++++++++++++++++++++++++++++++++++++ |
| 1 file changed, 40 insertions(+) |
| |
| diff --git a/init.d b/init.d |
| index 0111ed4..24677c8 100644 |
| --- a/init.d |
| +++ b/init.d |
| @@ -6,8 +6,48 @@ PATH=/sbin:/bin:/usr/sbin:/usr/bin |
| # Don't modify this line, change or create /etc/default/bind9. |
| OPTIONS="" |
| |
| +test -f /etc/default/rcS && . /etc/default/rcS |
| test -f /etc/default/bind9 && . /etc/default/bind9 |
| |
| +# This function is here because it's possible that /var and / are on different partitions. |
| +is_on_read_only_partition () { |
| + DIRECTORY=$1 |
| + dir=`readlink -f $DIRECTORY` |
| + while true; do |
| + if [ ! -d "$dir" ]; then |
| + echo "ERROR: $dir is not a directory" |
| + exit 1 |
| + else |
| + for flag in `awk -v dir=$dir '{ if ($2 == dir) { print "FOUND"; split($4,FLAGS,",") } }; \ |
| + END { for (f in FLAGS) print FLAGS[f] }' < /proc/mounts`; do |
| + [ "$flag" = "FOUND" ] && partition="read-write" |
| + [ "$flag" = "ro" ] && { partition="read-only"; break; } |
| + done |
| + if [ "$dir" = "/" -o -n "$partition" ]; then |
| + break |
| + else |
| + dir=`dirname $dir` |
| + fi |
| + fi |
| + done |
| + [ "$partition" = "read-only" ] && echo "yes" || echo "no" |
| +} |
| + |
| +bind_mount () { |
| + olddir=$1 |
| + newdir=$2 |
| + mkdir -p $olddir |
| + cp -a $newdir/* $olddir |
| + mount --bind $olddir $newdir |
| +} |
| + |
| +# Deal with read-only rootfs |
| +if [ "$ROOTFS_READ_ONLY" = "yes" ]; then |
| + [ "$VERBOSE" != "no" ] && echo "WARN: start bind service in read-only rootfs" |
| + [ `is_on_read_only_partition /etc/bind` = "yes" ] && bind_mount /var/volatile/bind/etc /etc/bind |
| + [ `is_on_read_only_partition /var/named` = "yes" ] && bind_mount /var/volatile/bind/named /var/named |
| +fi |
| + |
| test -x /usr/sbin/rndc || exit 0 |
| |
| case "$1" in |
| -- |
| 1.7.9.5 |
| |