#5251: copyFile does not copy metadata
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Reporter: Orphi | Owner:
Type: bug | Status: new
Priority: normal | Component: libraries/directory
Version: 7.0.2 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Comment(by Orphi):
For reference, here are the Windows-specific things which are ''not''
copied by `copyFile`:
* The "hidden" attribute.
* The "system" attribute.
* The "compressed" attribute.
* The "indexed" attribute.
* Security settings.
* File owner.
* Auditing settings.
* Alternative Data Streams.
The "archive" bit is also not copied - but this is almost certainly the
''correct'' thing to do.
Interestingly, the "read only" attribute ''is'' copied correctly.
I was unable to test the following, but I believe they will be lost too:
* Sparse files [will become dense when copied].
* FS-level encryption.
As you can see, Windows stores a hell of a lot of metadata about files,
almost all of which the naive `copyFile` implementation is blindly
stripping off. It wouldn't surprise me if it drops metadata on Unix too,
although I haven't had time to test yet.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5251#comment:1>
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