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