Volker Stolz wrote: > In local.glasgow-haskell-bugs, you wrote: > > Am 10. Jul 2002 um 22:21 CEST schrieb Dean Herington: > >> The first issue I confronted is that the get*ProcessStatus routines return > >> an error rather than "nothing" if there is no candidate child process. > > > > Yes, `waitpid' might return with EINTR which will cause an exception > > (I just checked, it did). I'll try to devise a fix for PosixProcPrim. > > That's ECHILD, not EINTR.
Yes, that's what I would expect from reading the man page. I was not complaining about the Unix semantics, just noting that there was a subtlety I wasn't previously aware of that made my code more complex. > The only nice way to figure this out might be keeping a global counter > (in an MVar), increasing it on forkProcess() and counting it down for > each "awaited" child. That way, you could safely loop on `waitpid' if > you know there should still be a child around (and you'll get `Nothing' > if it's not done yet). Yes, that's exactly the solution I came up with. > Volker Thanks. Dean _______________________________________________ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
