Introduce new pkg state: half-unpacked.

Packages in this state shall be re-installed and re-unpacked because its
files weren't unpacked properly.

include/xbps_api.h

@@ -1293,6 +1293,9 @@ int xbps_repository_sync_pkg_index(const char *uri);
  * Integer representing a state on which a package may be. Possible
  * values for this are:
  *
+ * <b>XBPS_PKG_STATE_HALF_UNPACKED</b>: Package was being unpacked
+ * but didn't finish properly.
+ *
  * <b>XBPS_PKG_STATE_UNPACKED</b>: Package has been unpacked correctly
  * but has not been configured due to unknown reasons.
  *
@@ -1311,7 +1314,8 @@ typedef enum pkg_state {
 	XBPS_PKG_STATE_INSTALLED,
 	XBPS_PKG_STATE_BROKEN,
 	XBPS_PKG_STATE_CONFIG_FILES,
-	XBPS_PKG_STATE_NOT_INSTALLED
+	XBPS_PKG_STATE_NOT_INSTALLED,
+	XBPS_PKG_STATE_HALF_UNPACKED
 } pkg_state_t;
 
 /**

include/xbps_api_impl.h

@@ -44,7 +44,8 @@
 #define EXTRACT_FLAGS	ARCHIVE_EXTRACT_SECURE_NODOTDOT | \
 			ARCHIVE_EXTRACT_SECURE_SYMLINKS
 #define FEXTRACT_FLAGS	ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM | \
-			ARCHIVE_EXTRACT_TIME | EXTRACT_FLAGS
+			ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_UNLINK | \
+			EXTRACT_FLAGS
 
 #ifndef __UNCONST
 #define __UNCONST(a)	((void *)(unsigned long)(const void *)(a))