switch from System.Cmd.Utils to System.Process

Test suite now passes with -threaded!

I traced back all the hangs with -threaded to System.Cmd.Utils. It seems
it's just crappy/unsafe/outdated, and should not be used. System.Process
seems to be the cool new thing, so converted all the code to use it
instead.

In the process, --debug stopped printing commands it runs. I may try to
bring that back later.

Note that even SafeSystem was switched to use System.Process. Since that
was a modified version of code from System.Cmd.Utils, it needed to be
converted too. I also got rid of nearly all calls to forkProcess,
and all calls to executeFile, which I'm also doubtful about working
well with -threaded.

1 files changed, 1 insertions, 0 deletions

diff --git a/test.hs b/test.hs
index 9de73264e..a377057c2 100644
--- a/test.hs
+++ b/test.hs
@@ -14,6 +14,7 @@ import Test.QuickCheck
 import System.Posix.Directory (changeWorkingDirectory)
 import System.Posix.Files
 import System.Posix.Env
+import System.Posix.Process
 import Control.Exception.Extensible
 import qualified Data.Map as M
 import System.IO.HVFS (SystemFS(..))