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<title>System/Unix/Misc.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-- |Wrappers around some handy unix shell commands. Please let</span>
<a name="line-2"></a><span class='hs-comment'>-- me know if you think of better module names to hold these</span>
<a name="line-3"></a><span class='hs-comment'>-- functions. -dsf</span>
<a name="line-4"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Unix</span><span class='hs-varop'>.</span><span class='hs-conid'>Misc</span>
<a name="line-5"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>md5sum</span>
<a name="line-6"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>gzip</span><span class='hs-layout'>)</span>
<a name="line-7"></a> <span class='hs-keyword'>where</span>
<a name="line-8"></a>
<a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Codec</span><span class='hs-varop'>.</span><span class='hs-conid'>Compression</span><span class='hs-varop'>.</span><span class='hs-conid'>GZip</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span> <span class='hs-layout'>(</span><span class='hs-varid'>empty</span><span class='hs-layout'>,</span> <span class='hs-varid'>readFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>writeFile</span><span class='hs-layout'>)</span>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Digest</span><span class='hs-varop'>.</span><span class='hs-conid'>Pure</span><span class='hs-varop'>.</span><span class='hs-conid'>MD5</span> <span class='hs-layout'>(</span><span class='hs-varid'>md5</span><span class='hs-layout'>)</span>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Cmd</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Exit</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Files</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Process</span>
<a name="line-20"></a>
<a name="line-21"></a><a name="md5sum"></a><span class='hs-comment'>{-# DEPRECATED md5sum "Use Data.ByteString.Lazy.Char8.readFile path >>= return . show . Data.Digest.Pure.MD5.md5" #-}</span>
<a name="line-22"></a><span class='hs-definition'>md5sum</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span>
<a name="line-23"></a><span class='hs-definition'>md5sum</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span><span class='hs-varop'>.</span><span class='hs-varid'>readFile</span> <span class='hs-varid'>path</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>show</span> <span class='hs-varop'>.</span> <span class='hs-varid'>md5</span>
<a name="line-24"></a><span class='hs-comment'>{-
<a name="line-25"></a> do
<a name="line-26"></a> (text, _, exitCode) <- lazyProcess "md5sum" [path] Nothing Nothing empty >>= return . collectOutputUnpacked
<a name="line-27"></a> let output = listToMaybe (words text)
<a name="line-28"></a> case exitCode of
<a name="line-29"></a> ExitSuccess ->
<a name="line-30"></a> case output of
<a name="line-31"></a> Nothing -> error ("Error in output of 'md5sum " ++ path ++ "'")
<a name="line-32"></a> Just checksum -> return checksum
<a name="line-33"></a> _ -> error ("Error running 'md5sum " ++ path ++ "'")
<a name="line-34"></a>-}</span>
<a name="line-35"></a>
<a name="line-36"></a><a name="gzip"></a><span class='hs-comment'>{-# DEPRECATED gzip "Use Data.ByteString.Lazy.Char8.readFile path >>= Data.ByteString.Lazy.Char8.writeFile (path ++ \".gz\")" #-}</span>
<a name="line-37"></a><span class='hs-definition'>gzip</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-38"></a><span class='hs-definition'>gzip</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span><span class='hs-varop'>.</span><span class='hs-varid'>readFile</span> <span class='hs-varid'>path</span> <span class='hs-varop'>>>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span><span class='hs-varop'>.</span><span class='hs-varid'>writeFile</span> <span class='hs-layout'>(</span><span class='hs-varid'>path</span> <span class='hs-varop'>++</span> <span class='hs-str'>".gz"</span><span class='hs-layout'>)</span>
<a name="line-39"></a><span class='hs-comment'>{-
<a name="line-40"></a> do
<a name="line-41"></a> result <- system ("gzip < " ++ path ++ " > " ++ path ++ ".gz")
<a name="line-42"></a> case result of
<a name="line-43"></a> ExitSuccess -> return ()
<a name="line-44"></a> e -> error (show e)
<a name="line-45"></a>-}</span>
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