Finish incorporating cleanup in the normal shutdown process.

scripts/build_image/build_alpine.bash

@@ -9,18 +9,9 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 function cleanup {
     sync
     kill_gpg_agent
-    for f in "${jails[@]}"; do
-        log "Stopping jail $f"
-        jail -r "$f"
-    done
-    for (( idx=${#mountedfolders[@]}-1 ; idx>=0 ; idx-- )) ; do
-        log "Unmounting folder ${mountedfolders[idx]}"
-        umount "${mountedfolders[idx]}"
-    done
-    for f in "${memorydevices[@]}"; do
-        log "Removing memory device $f"
-        mdconfig -d -u "$f"
-    done
+    stop_jails
+    unmount_folders
+    remove_memory_devices
     for f in "${folders[@]}"; do
         log "Deleting $f"
         rm -rf "$f"
@@ -227,8 +218,28 @@ function kill_gpg_agent {
     unset gpgagents
 }
 
-function unmount_image {
-    echo "foo"
+function stop_jails {
+    for f in "${jails[@]}"; do
+        log "Stopping jail $f"
+        jail -r "$f"
+    done
+    unset jails
+}
+
+function unmount_folders {
+    for (( idx=${#mountedfolders[@]}-1 ; idx>=0 ; idx-- )) ; do
+        log "Unmounting folder ${mountedfolders[idx]}"
+        umount "${mountedfolders[idx]}"
+    done
+    unset mountedfolders
+}
+
+function remove_memory_devices {
+    for f in "${memorydevices[@]}"; do
+        log "Removing memory device $f"
+        mdconfig -d -u "$f"
+    done
+    unset memorydevices
 }
 
 function main {
@@ -253,6 +264,9 @@ function main {
     make_chroot
 
     kill_gpg_agent
+    stop_jails
+    unmount_folders
+    remove_memory_devices
 
     log "Copying final image to $DIR"
     cp "$image_file" "$DIR"