Add experimental support for Windows VSS

[wimlib] / src / update_image.c

diff --git a/src/update_image.c b/src/update_image.c
index 15458a12b51593984d00637d701abad8d13fe377..c76ae97131d728935db67c62d8f3377af2d8b312 100644 (file)
--- a/src/update_image.c
+++ b/src/update_image.c
@@ -1197,7 +1197,8 @@ check_add_command(struct wimlib_update_command *cmd,
                          WIMLIB_ADD_FLAG_WINCONFIG |
                          WIMLIB_ADD_FLAG_WIMBOOT |
                          WIMLIB_ADD_FLAG_NO_REPLACE |
-                         WIMLIB_ADD_FLAG_TEST_FILE_EXCLUSION))
+                         WIMLIB_ADD_FLAG_TEST_FILE_EXCLUSION |
+                         WIMLIB_ADD_FLAG_SNAPSHOT))
                return WIMLIB_ERR_INVALID_PARAM;
 
        bool is_entire_image = WIMLIB_IS_WIM_ROOT_PATH(cmd->add.wim_target_path);
@@ -1211,7 +1212,7 @@ check_add_command(struct wimlib_update_command *cmd,
 #endif
 
 #ifdef __WIN32__
-       /* Check for flags not supported on Windows */
+       /* Check for flags not supported on Windows.  */
        if (add_flags & WIMLIB_ADD_FLAG_UNIX_DATA) {
                ERROR("Capturing UNIX-specific data is not supported on Windows");
                return WIMLIB_ERR_UNSUPPORTED;
@@ -1220,6 +1221,15 @@ check_add_command(struct wimlib_update_command *cmd,
                ERROR("Dereferencing symbolic links is not supported on Windows");
                return WIMLIB_ERR_UNSUPPORTED;
        }
+#else
+       /* Check for flags only supported on Windows.  */
+
+       /* Currently, SNAPSHOT means Windows VSS.  In the future, it perhaps
+        * could be implemented for other types of snapshots, such as btrfs.  */
+       if (add_flags & WIMLIB_ADD_FLAG_SNAPSHOT) {
+               ERROR("Snapshot mode is only supported on Windows (VSS)");
+               return WIMLIB_ERR_UNSUPPORTED;
+       }
 #endif
 
        /* VERBOSE implies EXCLUDE_VERBOSE */