"Max A . K ."
On Mon, Nov 19, 2001 at 10:14:02AM -0800, Sigbjorn Finne wrote:
I think that's a reasonable request, but the reason that it isn't in there already is that the Posix library implements just POSIX 1003.1a (1990), not also 1003.1b (1993), which is when the (so-called) real-time/POSIX.4 extensions (incl O_SYNC) were introduced.
I see.
Rather than patching the Posix library to include stuff like O_SYNC, I'd like to see a Haskell binding to the Single UNIX (aka Unix98) instead - it subsumes the POSIX.1 APIs (and you can get at the specs without having to pay the extortionate rates that IEEE charges). Feel free to contribute such a binding!
I'm afraid I will not. There is pretty huge number of functions to bind, and I'm afraid to miss some. Then I'm not wery good Haskeller.
Moreover, I could not see the Single Unix features in the linux-2.2 (at least that nice O_DSYNC flag). Maybe they are presented in 2.4, but I have no plan to use it.
AFAIK no OS implements all of the Single Unix specification. Nevertheless, I think, Sigbjorn is right. Ideally, we should have a binding for Single Unix and on any particular OS, you will have a subset of it available (that's the same situation as you have with any other programming language). As is pointed out in the open(2) man page, O_SYNC, O_DSYNC, and O_RSYNC are synonymous in Linux 2.2. In 2.4, at least with some file systems (eg, XFS) you can choose which behaviour O_SYNC should have. Cheers, Manuel