diff --git a/src/bee-cache.sh.in b/src/bee-cache.sh.in
index aff3a95..0ec8df5 100644
--- a/src/bee-cache.sh.in
+++ b/src/bee-cache.sh.in
@@ -36,12 +36,16 @@ VERSION=${BEE_VERSION}
 : ${BEECACHE_INVENTORY=${BEECACHE_CACHEDIR}/INVENTORY}
 
 function cache_verify() {
-    if ! ${BEEFLOCK} --shared "${BEECACHE_INVENTORY}" \
+    if ${BEEFLOCK} --shared "${BEECACHE_INVENTORY}" \
               sort -c -u -r -k8 -k1 "${BEECACHE_INVENTORY}" 2>/dev/null ; then
-        rm -fr "${BEECACHE_CACHEDIR}"
+        return
     fi
 
+    rm -fr "${BEECACHE_CACHEDIR}"
     mkdir -p "${BEECACHE_CACHEDIR}"
+
+    ${BEEFLOCK} ${BEECACHE_INVENTORY} \
+        ${BEE_LIBEXECDIR}/bee/bee-cache-update >/dev/null
 }
 
 function cache_update() {
@@ -67,6 +71,11 @@ function cache_update_pkg() {
     return 0
 }
 
+function cache_grep() {
+    ${BEEFLOCK} --shared ${BEECACHE_INVENTORY} \
+        grep "${@}" ${BEECACHE_INVENTORY}
+}
+
 function print_conflicts() {
     local pkg=${1}
 
@@ -235,6 +244,9 @@ cache_verify
 tmpinstall_to_filenames
 
 case "${cmd}" in
+    grep)
+        cache_grep "${@}" | cut -d ' ' -f${FIELDS}
+        ;;
     update)
         cache_update "${@}"
         ;;