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I presume that this is a bug in setPermissions?

Yes, it's a bug. However, since getPermissions/setPermissions doesn't really give you enough control in Unix, I suggest you use

On Wed, Feb 18, 2004 at 12:31:34PM -0000, Simon Marlow wrote: the functions

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available from System.Posix instead (fileStatus, fileMode, setFileMode etc.).

Well, in my case all I want to do is to copy permissions from one file to another, so get/setPermissions would have been fine. But yeah, I've already switched to using setFileMode etc.

Actually if you want to copy permissions from one file to another, then get/setPermissions is *not* what you want. It will only copy across the owner's permissions. The problem is that the Permissions type is fully defined and non-abstract; there's no place to store extra platform-specific permission bits. Cheers, Simon