Prevent downgrading file versions when opening in write mode.

glotzerlab · Oct 21, 2024 · d39a408 · d39a408
1 parent b802923
commit d39a408
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diff --git a/CHANGELOG.rst b/CHANGELOG.rst
@@ -10,6 +10,13 @@ Change Log
 3.x
 ---
 
+3.4.1 (2024-10-21)
+^^^^^^^^^^^^^^^^^^
+
+*Fixed:*
+
+* Prevent downgrading file versions when opening in write mode.
+
 3.4.0 (2024-10-18)
 ^^^^^^^^^^^^^^^^^^
 

diff --git a/gsd/gsd.c b/gsd/gsd.c
@@ -1617,7 +1617,7 @@ inline static int gsd_initialize_handle(struct gsd_handle* handle)
     // minor version.
     if ((handle->open_flags == GSD_OPEN_READWRITE || handle->open_flags == GSD_OPEN_APPEND)
         && (handle->header.gsd_version
-            != gsd_make_version(GSD_CURRENT_FILE_VERSION_MAJOR, GSD_CURRENT_FILE_VERSION_MINOR))
+            <= gsd_make_version(GSD_CURRENT_FILE_VERSION_MAJOR, GSD_CURRENT_FILE_VERSION_MINOR))
         && (handle->header.gsd_version >> (sizeof(uint32_t) * 4) == GSD_CURRENT_FILE_VERSION_MAJOR))
         {
         handle->header.gsd_version