initscripts: populate-volatiles.sh: add mount-bind feature

Add ability to run "mount --bind" to populate-volatiles. Since several
programs use realpath to determine several full qualified file names,
there is no symlink to be resolved. So when speccing /run/lock - that's
the location - not /var/run/lock because of the program is smarter
than the operator/distributor.

See https://github.com/rehsack/meta-jens/blob/jethro/recipes-core/initscripts/initscripts/volatiles
for an example how to use the "b" feature.

(From OE-Core rev: ab42fcaf1427a29c31ac2e93965e20849b1b1234)

Signed-off-by: Jens Rehsack <sno@netbsd.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh b/meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh
index 904037eeaa..ce4622a5e5 100755
--- a/meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh
+++ b/meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh
@@ -163,6 +163,16 @@ apply_cfgfile() {
                         continue
                 }
 
+                [ "${TTYPE}" = "b" ] && {
+                        TSOURCE="$TLTARGET"
+                        [ "${VERBOSE}" != "no" ] && echo "Creating mount-bind -${TNAME}- from -${TSOURCE}-."
+                        mount --bind "${TSOURCE}" "${TNAME}"
+                        EXEC="
+        mount --bind \"${TSOURCE}\" \"${TNAME}\""
+                        test "$VOLATILE_ENABLE_CACHE" = yes && echo "$EXEC" >> /etc/volatile.cache.build
+                        continue
+                }
+
                 [ -L "${TNAME}" ] && {
                         [ "${VERBOSE}" != "no" ] && echo "Found link."
                         NEWNAME=`ls -l "${TNAME}" | sed -e 's/^.*-> \(.*\)$/\1/'`