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1730ef4ac3
This flag skips truncation when opening a file for write on drivers that support it, currently Posix and CIFS. This is convenient for cases where the file needs to be manipulated directly using the file descriptor. Using the file descriptor is not ideal and additional functionality should be added to the storage interface, but for now at least this avoids code duplication, especially on close which updates owners, the timestamp, syncs, etc. The remote driver forbids no truncate because a file descriptor is never available for a remote storage write object. Update two instances in the current code which benefit from this new functionality, but the primary reason for the change is to support more complex restore deltas in the upcoming block incremental feature. |
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