From 7afac113443b8e93e19ad87d769a24c52706f551 Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@kitenet.net>
Date: Tue, 19 Oct 2010 01:45:45 -0400
Subject: add boolSystem

---
 Utility.hs | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/Utility.hs b/Utility.hs
index e4278ff3f..09b973002 100644
--- a/Utility.hs
+++ b/Utility.hs
@@ -6,10 +6,15 @@ module Utility (
 	hGetContentsStrict,
 	parentDir,
 	relPathCwdToDir,
-	relPathDirToDir
+	relPathDirToDir,
+	boolSystem
 ) where
 
 import System.IO
+import System.Cmd
+import System.Exit
+import System.Posix.Signals
+import Data.Typeable
 import System.Posix.IO
 import Data.String.Utils
 import System.Path
@@ -88,3 +93,18 @@ relPathDirToDir from to =
 		dotdots = take ((length pfrom) - numcommon) $ repeat ".."
 		numcommon = length $ common
 		path = join s $ dotdots ++ uncommon
+
+{- Run a system command, and returns True or False
+ - if it succeeded or failed.
+ -
+ - An error is thrown if the command exits due to SIGINT,
+ - to propigate ctrl-c.
+ -}
+boolSystem :: FilePath -> [String] -> IO Bool
+boolSystem command params = do
+	r <- rawSystem command params
+	case r of
+		ExitSuccess -> return True
+		ExitFailure e -> if Just e == cast sigINT
+			then error $ command ++ "interrupted"
+			else return False
-- 
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