Bjorn Bringert wrote:
On Mar 4, 2007, at 23:46 , David Brown wrote:
Hi, I'm writing some code to use System.Posix.Files to restore a filesystem. I've discovered a few missing things.
- There is a createDevice, but the mode values needed to pass to this call aren't exported (blockSpecialMode, characterSpecialMode).
Wouldn't you also need to be able to specify the major and minor numbers for the device? I have a first try at that in the System.PosixCompat.Extensions module in the unix-compat package (darcs repo: http://www.cs.chalmers.se/~bringert/darcs/unix-compat/). The unix-compat package aims to provide the unix package API on all platforms, with suitable dummy implementations when there is no corresponding functionality.
Looks good. It's really curious how Linux has decided to add 16 bit major and minor numbers into the picture. They still use the low bit for minor and the next 8 bits for major. Then the upper groups of 8 bits are tacked on, all interleaved and such. Best to just call the macros :-) I don't really need these, since I'm just putting devices back to the way there were. Also, Your Files.hsc doesn't export blockSpecialMode either. I think having that and characterSpecialMode and fileTypeModes exported would make manipulating those bits a lot nicer. Dave