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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
|
