- * complete, not being deleted: 1204565370-1204565371.Sun_Mar_02_2008_14_33-Sun_Mar_02_2008_14_43
- * complete, being deleted: 1204565370-1204565371.being_deleted
- * incomplete, not being deleted: 1204565370-incomplete
- * incomplete, being deleted: 1204565370-incomplete.being_deleted
+ * Copyright (C) 2008-2010 Andre Noll <maan@tuebingen.mpg.de>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+
+/** The possible states for snapshot creation/removal. */
+#define HOOK_STATUS_ARRAY \
+ HSA_ITEM(HS_READY, "ready for action"), \
+ HSA_ITEM(HS_PRE_RUNNING, "pre-hook running"), \
+ HSA_ITEM(HS_PRE_SUCCESS, "pre-hook completed successfully"), \
+ HSA_ITEM(HS_RUNNING, "in progress"), \
+ HSA_ITEM(HS_SUCCESS, "process terminated successfully"), \
+ HSA_ITEM(HS_NEEDS_RESTART, "restart needed"), \
+ HSA_ITEM(HS_POST_RUNNING, "post-hook running")
+
+
+#define HSA_ITEM(x, y) x
+enum hook_status {HOOK_STATUS_ARRAY};
+#undef HSA_ITEM
+#define HSA_ITEM(x, y) y
+
+
+/**
+ * The status of a snapshot.
+ *
+ * The snapshot directories come in four different flavours, depending
+ * on how the two status flags are set. Examples:
+ *
+ * Complete, not being deleted: 1204565370-1204565371.Sun_Mar_02_2008_14_33-Sun_Mar_02_2008_14_43.
+ * Complete, being deleted: 1204565370-1204565371.being_deleted.
+ * Incomplete, not being deleted: 1204565370-incomplete.
+ * incomplete, being deleted: 1204565370-incomplete.being_deleted.