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| author | Joe Zhao <ztuowen@gmail.com> | 2014-08-09 10:58:03 +0800 |
|---|---|---|
| committer | Joe Zhao <ztuowen@gmail.com> | 2014-08-09 10:58:03 +0800 |
| commit | 5bdaa1e4ffe40add10f000ee993e6b500c419a37 (patch) | |
| tree | 46a624488ece8d37fa3580422234ed2b4acc6728 /copyFile.hs | |
| parent | 01aa73b269f7ad780233be338affdf3c9288b1ed (diff) | |
| download | haskbox-old-5bdaa1e4ffe40add10f000ee993e6b500c419a37.tar.gz haskbox-old-5bdaa1e4ffe40add10f000ee993e6b500c419a37.tar.bz2 haskbox-old-5bdaa1e4ffe40add10f000ee993e6b500c419a37.zip | |
add files from home for previous chapters and sandboxes
Diffstat (limited to 'copyFile.hs')
| -rw-r--r-- | copyFile.hs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/copyFile.hs b/copyFile.hs new file mode 100644 index 0000000..0835b0e --- /dev/null +++ b/copyFile.hs @@ -0,0 +1,21 @@ +import System.Environment +import System.Directory +import System.IO +import Control.Exception +import qualified Data.ByteString.Lazy as B + +main = do + (fileName1:fileName2:_) <- getArgs + copy fileName1 fileName2 + +copy source dest = do + contents <- B.readFile source + bracketOnError + (openTempFile "." "temp") + (\(tempName, tempHandle) -> do + hClose tempHandle + removeFile tempName) + (\(tempName, tempHandle) -> do + B.hPutStr tempHandle contents + hClose tempHandle + renameFile tempName dest) |