Always cleanup on failure

build/meta/com/google/android/update-binary

@@ -23,10 +23,9 @@ ui_print() {
 
 cleanup() {
   ui_print "Cleaning up files"
-  cd ../
-  rm -rf system
-  rm -rf bin
-  rm toybox
+  rm -rf $TMP/system
+  rm -rf $TMP/bin
+  rm $TMP/toybox
 
   ui_print "Unmounting partitions"
   umount -l "$SYSTEM_MNT"
@@ -34,12 +33,20 @@ cleanup() {
   umount -l /system_ext || true
 }
 
-error_no_space() {
-  ui_print "Not enough space for GApps! Aborting"
+error() {
+  ui_print "$1"
   cleanup
   exit 1
 }
 
+error_no_space() {
+  error "Not enough space for GApps! Aborting"
+}
+
+error_mounting() {
+  error "Could not mount $1! Aborting"
+}
+
 get_block_for_mount_point() {
   grep -v "^#" /etc/recovery.fstab | grep "[[:blank:]]$1[[:blank:]]" | tail -n1 | tr -s [:blank:] ' ' | cut -d' ' -f1
 }
@@ -170,8 +177,7 @@ mkdir -p "$SYSTEM_MNT" || true
 if mount -o rw "$SYSTEM_BLOCK" "$SYSTEM_MNT"; then
 ui_print "$SYSTEM_MNT mounted"
 else
-ui_print "Could not mount $SYSTEM_MNT! Aborting"
-exit 1
+error_mounting "$SYSTEM_MNT"
 fi
 SYSTEM_OUT="${SYSTEM_MNT}/system"
 
@@ -190,8 +196,7 @@ if [ -n "$PRODUCT_BLOCK" ]; then
   if mount -o rw "$PRODUCT_BLOCK" /product; then
     ui_print "/product mounted"
   else
-    ui_print "Could not mount /product"
-    exit 1
+    error_mounting "/product"
   fi
 fi
 if [ -n "$SYSTEM_EXT_BLOCK" ]; then
@@ -199,8 +204,7 @@ if [ -n "$SYSTEM_EXT_BLOCK" ]; then
   if mount -o rw "$SYSTEM_EXT_BLOCK" /system_ext; then
     ui_print "/system_ext mounted"
   else
-    ui_print "Could not mount /system_ext"
-    exit 1
+    error_mounting "/system_ext"
   fi
 fi