Environment variable does not work (especially DARCS_EDITOR)
Glynn Clements glynn at gclements.plus.com Thu Apr 21 12:57:17
EDT 2005  Simon Marlow wrote:  > > The test program works after
applying the following patch to GHC > > that disables
nonblocking mode after the fork and before the exec.  > If we
did this, we would also need to re-enable non-blocking mode
after > the rawSystem completes.  Also, this doesn't work well
if runProcess is > used and the Haskell program continues to run
while the subprocess is > executing, because the O_NONBLOCK flag
is shared between parent and > child.  Presumably the Haskell
program won't like it very much if the spawned program disables
O_NONBLOCK itself?  Is there a reason (other than performance)
why the use of O_NONBLOCK can't be replaced with calling
select/poll before accessing the  Is non-blocking I/O only
necessary if you need explicit concurrency? Or do the runtime or
critical libraries require it?  Glynn Clements <glynn at
gclements.plus.com>  More information a