Jakob Unterwurzacher bbf5b72fff WriteDirIV: delete incomplete gocryptfs.diriv file if write fails
If the underlying filesystem is full, writing to gocryptfs.diriv may
fail, and later fsck show this:

	OpenDir "xyz": could not read gocryptfs.diriv: wanted 16 bytes, got 0

Uncovered by xfstests generic/083.

Also fixes a fd leak in the error path.
2018-07-15 12:02:39 +02:00
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