fallback to manually consume space if posix_fallocate isn't supported…

… at runtime (#7251)
realm · Jan 12, 2024 · 865cf5e · 865cf5e
1 parent a558fa4
commit 865cf5e
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,6 +5,7 @@
 * None.
 
 ### Fixed
+* Handle `EOPNOTSUPP` when using `posix_fallocate()` and fallback to manually consume space. This should enable android users to open a Realm on restrictive filesystems. ([realm-js #6349](https://github.com/realm/realm-js/issues/6349), more prevalent since v13.23.3 with the change to `REALM_HAVE_POSIX_FALLOCATE` but it was also an issue in some platforms before this)
 * Application may crash with `incoming_changesets.size() != 0` when a download message is mistaken for a bootstrap message (PR [#7238](https://github.com/realm/realm-core/pull/7238), since v11.8.0)
 
 ### Breaking changes

diff --git a/src/realm/util/file.cpp b/src/realm/util/file.cpp
@@ -1010,7 +1010,7 @@ bool File::prealloc_if_supported(SizeType offset, size_t size)
         return true;
     }
 
-    if (status == EINVAL || status == EPERM) {
+    if (status == EINVAL || status == EPERM || status == EOPNOTSUPP) {
         return false; // Retry with non-atomic version
     }