[Haskell-cafe] System.Posix.Files.isDirectory and
duncan.coutts at worc.ox.ac.uk
Sun Feb 1 19:05:08 EST 2009
On Mon, 2009-02-02 at 09:49 +1100, Erik de Castro Lopo wrote:
> Hi all,
> The following code creates a symbolic link in the current directory
> and then uses System.Posix.Files.getFileStatus to get the status of
> the link.
> However, isDirectory returns True and isSymbolicLink returns False
> which is very different from what the stat() system call on a POSIX
> system would return. I consider this a bug.
No, it is the correct POSIX behaviour. You are thinking of lstat() which
is what getSymbolicLinkStatus uses. The getFileStatus function calls
The documentation makes this clear:
getFileStatus :: FilePath -> IO FileStatus
getFileStatus path calls gets the FileStatus information (user
ID, size, access times, etc.) for the file path.
Note: calls stat.
getSymbolicLinkStatus :: FilePath -> IO FileStatus
Acts as getFileStatus except when the FilePath refers to a
symbolic link. In that case the FileStatus information of the
symbolic link itself is returned instead of that of the file it
Note: calls lstat.
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