276 lines
45 KiB
HTML
276 lines
45 KiB
HTML
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<title>src/System/Posix/Directory/Traversals.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-- |</span>
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<a name="line-2"></a><span class='hs-comment'>-- Module : System.Posix.Directory.Traversals</span>
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<a name="line-3"></a><span class='hs-comment'>-- Copyright : © 2016 Julian Ospald</span>
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<a name="line-4"></a><span class='hs-comment'>-- License : BSD3</span>
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<a name="line-5"></a><span class='hs-comment'>--</span>
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<a name="line-6"></a><span class='hs-comment'>-- Maintainer : Julian Ospald <hasufell@posteo.de></span>
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<a name="line-7"></a><span class='hs-comment'>-- Stability : experimental</span>
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<a name="line-8"></a><span class='hs-comment'>-- Portability : portable</span>
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<a name="line-9"></a><span class='hs-comment'>--</span>
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<a name="line-10"></a><span class='hs-comment'>-- Traversal and read operations on directories.</span>
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<a name="line-11"></a>
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<a name="line-12"></a>
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<a name="line-13"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
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<a name="line-14"></a><span class='hs-comment'>{-# LANGUAGE ForeignFunctionInterface #-}</span>
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<a name="line-15"></a><span class='hs-comment'>{-# LANGUAGE OverloadedStrings #-}</span>
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<a name="line-16"></a><span class='hs-comment'>{-# LANGUAGE PackageImports #-}</span>
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<a name="line-17"></a><span class='hs-comment'>{-# LANGUAGE TupleSections #-}</span>
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<a name="line-18"></a><span class='hs-comment'>{-# LANGUAGE ViewPatterns #-}</span>
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<a name="line-19"></a>
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<a name="line-20"></a><span class='hs-comment'>{-# OPTIONS_GHC -Wall #-}</span>
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<a name="line-21"></a>
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<a name="line-22"></a>
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<a name="line-23"></a><span class='hs-keyword'>module</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'>Directory</span><span class='hs-varop'>.</span><span class='hs-conid'>Traversals</span> <span class='hs-layout'>(</span>
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<a name="line-24"></a>
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<a name="line-25"></a> <span class='hs-varid'>getDirectoryContents</span>
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<a name="line-26"></a><span class='hs-layout'>,</span> <span class='hs-varid'>getDirectoryContents'</span>
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<a name="line-27"></a>
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<a name="line-28"></a><span class='hs-layout'>,</span> <span class='hs-varid'>allDirectoryContents</span>
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<a name="line-29"></a><span class='hs-layout'>,</span> <span class='hs-varid'>allDirectoryContents'</span>
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<a name="line-30"></a><span class='hs-layout'>,</span> <span class='hs-varid'>traverseDirectory</span>
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<a name="line-31"></a>
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<a name="line-32"></a><span class='hs-comment'>-- lower-level stuff</span>
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<a name="line-33"></a><span class='hs-layout'>,</span> <span class='hs-varid'>readDirEnt</span>
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<a name="line-34"></a><span class='hs-layout'>,</span> <span class='hs-varid'>packDirStream</span>
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<a name="line-35"></a><span class='hs-layout'>,</span> <span class='hs-varid'>unpackDirStream</span>
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<a name="line-36"></a><span class='hs-layout'>,</span> <span class='hs-varid'>fdOpendir</span>
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<a name="line-37"></a>
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<a name="line-38"></a><span class='hs-layout'>,</span> <span class='hs-varid'>realpath</span>
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<a name="line-39"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
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<a name="line-40"></a>
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<a name="line-41"></a>
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<a name="line-42"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ < 710</span>
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<a name="line-43"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'><$></span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
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<a name="line-44"></a><span class='hs-cpp'>#endif</span>
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<a name="line-45"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
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<a name="line-46"></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'>FilePath</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'></></span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
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<a name="line-47"></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'>Directory</span><span class='hs-varop'>.</span><span class='hs-conid'>Foreign</span>
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<a name="line-48"></a>
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<a name="line-49"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Posix</span>
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<a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span>
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<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span>
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<a name="line-52"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</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'>Char8</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>BS</span>
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<a name="line-53"></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'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>FilePath</span>
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<a name="line-54"></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'>Directory</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>PosixBS</span>
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<a name="line-55"></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><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
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<a name="line-56"></a>
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<a name="line-57"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span>
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<a name="line-58"></a><span class='hs-keyword'>import</span> <span class='hs-str'>"unix"</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'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-layout'>(</span><span class='hs-varid'>closeFd</span><span class='hs-layout'>)</span>
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<a name="line-59"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Unsafe</span><span class='hs-varop'>.</span><span class='hs-conid'>Coerce</span> <span class='hs-layout'>(</span><span class='hs-varid'>unsafeCoerce</span><span class='hs-layout'>)</span>
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<a name="line-60"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span>
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<a name="line-61"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>String</span>
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<a name="line-62"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
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<a name="line-63"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Marshal</span><span class='hs-varop'>.</span><span class='hs-conid'>Alloc</span> <span class='hs-layout'>(</span><span class='hs-varid'>alloca</span><span class='hs-layout'>,</span><span class='hs-varid'>allocaBytes</span><span class='hs-layout'>)</span>
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<a name="line-64"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span>
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<a name="line-65"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Storable</span>
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<a name="line-66"></a>
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<a name="line-67"></a>
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<a name="line-68"></a>
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<a name="line-69"></a>
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<a name="line-70"></a><span class='hs-comment'>----------------------------------------------------------</span>
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<a name="line-71"></a>
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<a name="line-72"></a><a name="allDirectoryContents"></a><span class='hs-comment'>-- | Get all files from a directory and its subdirectories.</span>
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<a name="line-73"></a><span class='hs-comment'>--</span>
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<a name="line-74"></a><span class='hs-comment'>-- Upon entering a directory, 'allDirectoryContents' will get all entries</span>
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<a name="line-75"></a><span class='hs-comment'>-- strictly. However the returned list is lazy in that directories will only</span>
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<a name="line-76"></a><span class='hs-comment'>-- be accessed on demand.</span>
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<a name="line-77"></a><span class='hs-comment'>--</span>
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<a name="line-78"></a><span class='hs-comment'>-- Follows symbolic links for the input dir.</span>
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<a name="line-79"></a><span class='hs-definition'>allDirectoryContents</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RawFilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>RawFilePath</span><span class='hs-keyglyph'>]</span>
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<a name="line-80"></a><span class='hs-definition'>allDirectoryContents</span> <span class='hs-varid'>topdir</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-81"></a> <span class='hs-varid'>namesAndTypes</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getDirectoryContents</span> <span class='hs-varid'>topdir</span>
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<a name="line-82"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>properNames</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>`notElem`</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"."</span><span class='hs-layout'>,</span> <span class='hs-str'>".."</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>snd</span><span class='hs-layout'>)</span> <span class='hs-varid'>namesAndTypes</span>
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<a name="line-83"></a> <span class='hs-varid'>paths</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>forM</span> <span class='hs-varid'>properNames</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>typ</span><span class='hs-layout'>,</span><span class='hs-varid'>name</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>unsafeInterleaveIO</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
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<a name="line-84"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>topdir</span> <span class='hs-varop'></></span> <span class='hs-varid'>name</span>
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<a name="line-85"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>()</span> <span class='hs-keyword'>of</span>
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<a name="line-86"></a> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>typ</span> <span class='hs-varop'>==</span> <span class='hs-varid'>dtDir</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>allDirectoryContents</span> <span class='hs-varid'>path</span>
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<a name="line-87"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>typ</span> <span class='hs-varop'>==</span> <span class='hs-varid'>dtUnknown</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
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<a name="line-88"></a> <span class='hs-varid'>isDir</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isDirectory</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getFileStatus</span> <span class='hs-varid'>path</span>
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<a name="line-89"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>isDir</span>
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<a name="line-90"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>allDirectoryContents</span> <span class='hs-varid'>path</span>
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<a name="line-91"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>path</span><span class='hs-keyglyph'>]</span>
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<a name="line-92"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>path</span><span class='hs-keyglyph'>]</span>
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<a name="line-93"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>topdir</span> <span class='hs-conop'>:</span> <span class='hs-varid'>concat</span> <span class='hs-varid'>paths</span><span class='hs-layout'>)</span>
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<a name="line-94"></a>
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<a name="line-95"></a><a name="allDirectoryContents'"></a><span class='hs-comment'>-- | Get all files from a directory and its subdirectories strictly.</span>
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<a name="line-96"></a><span class='hs-comment'>--</span>
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<a name="line-97"></a><span class='hs-comment'>-- Follows symbolic links for the input dir.</span>
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<a name="line-98"></a><span class='hs-definition'>allDirectoryContents'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RawFilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>RawFilePath</span><span class='hs-keyglyph'>]</span>
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<a name="line-99"></a><span class='hs-definition'>allDirectoryContents'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>reverse</span> <span class='hs-varop'>.</span> <span class='hs-varid'>traverseDirectory</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>acc</span> <span class='hs-varid'>fp</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fp</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span>
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<a name="line-100"></a><span class='hs-comment'>-- this uses traverseDirectory because it's more efficient than forcing the</span>
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<a name="line-101"></a><span class='hs-comment'>-- lazy version.</span>
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<a name="line-102"></a>
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<a name="line-103"></a><a name="traverseDirectory"></a><span class='hs-comment'>-- | Recursively apply the 'action' to the parent directory and all</span>
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<a name="line-104"></a><span class='hs-comment'>-- files/subdirectories.</span>
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<a name="line-105"></a><span class='hs-comment'>--</span>
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<a name="line-106"></a><span class='hs-comment'>-- This function allows for memory-efficient traversals.</span>
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<a name="line-107"></a><span class='hs-comment'>--</span>
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<a name="line-108"></a><span class='hs-comment'>-- Follows symbolic links for the input dir.</span>
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<a name="line-109"></a><span class='hs-definition'>traverseDirectory</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RawFilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RawFilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>s</span>
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<a name="line-110"></a><span class='hs-definition'>traverseDirectory</span> <span class='hs-varid'>act</span> <span class='hs-varid'>s0</span> <span class='hs-varid'>topdir</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toploop</span>
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<a name="line-111"></a> <span class='hs-keyword'>where</span>
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<a name="line-112"></a> <span class='hs-varid'>toploop</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-113"></a> <span class='hs-varid'>isDir</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isDirectory</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getFileStatus</span> <span class='hs-varid'>topdir</span>
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<a name="line-114"></a> <span class='hs-varid'>s'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>act</span> <span class='hs-varid'>s0</span> <span class='hs-varid'>topdir</span>
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<a name="line-115"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>isDir</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>actOnDirContents</span> <span class='hs-varid'>topdir</span> <span class='hs-varid'>s'</span> <span class='hs-varid'>loop</span>
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<a name="line-116"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>s'</span>
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<a name="line-117"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>typ</span> <span class='hs-varid'>path</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-118"></a> <span class='hs-varid'>isDir</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>()</span> <span class='hs-keyword'>of</span>
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<a name="line-119"></a> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>typ</span> <span class='hs-varop'>==</span> <span class='hs-varid'>dtDir</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>True</span>
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<a name="line-120"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>typ</span> <span class='hs-varop'>==</span> <span class='hs-varid'>dtUnknown</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>isDirectory</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getFileStatus</span> <span class='hs-varid'>path</span>
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<a name="line-121"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>False</span>
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<a name="line-122"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>isDir</span>
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<a name="line-123"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>act</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>path</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>acc'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>actOnDirContents</span> <span class='hs-varid'>path</span> <span class='hs-varid'>acc'</span> <span class='hs-varid'>loop</span>
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<a name="line-124"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>act</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>path</span>
|
|
<a name="line-125"></a>
|
|
<a name="line-126"></a><a name="actOnDirContents"></a><span class='hs-definition'>actOnDirContents</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RawFilePath</span>
|
|
<a name="line-127"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span>
|
|
<a name="line-128"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>DirType</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RawFilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
|
|
<a name="line-129"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
|
|
<a name="line-130"></a><span class='hs-definition'>actOnDirContents</span> <span class='hs-varid'>pathRelToTop</span> <span class='hs-varid'>b</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span>
|
|
<a name="line-131"></a> <span class='hs-varid'>modifyIOError</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>`ioeSetFileName`</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>pathRelToTop</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span>
|
|
<a name="line-132"></a> <span class='hs-layout'>(</span><span class='hs-varop'>`ioeSetLocation`</span> <span class='hs-str'>"findBSTypRel"</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
|
|
<a name="line-133"></a> <span class='hs-varid'>bracket</span>
|
|
<a name="line-134"></a> <span class='hs-layout'>(</span><span class='hs-varid'>openDirStream</span> <span class='hs-varid'>pathRelToTop</span><span class='hs-layout'>)</span>
|
|
<a name="line-135"></a> <span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-varid'>closeDirStream</span>
|
|
<a name="line-136"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>dirp</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>loop</span> <span class='hs-varid'>dirp</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
|
|
<a name="line-137"></a> <span class='hs-keyword'>where</span>
|
|
<a name="line-138"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>dirp</span> <span class='hs-varid'>b'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
|
|
<a name="line-139"></a> <span class='hs-layout'>(</span><span class='hs-varid'>typ</span><span class='hs-layout'>,</span><span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readDirEnt</span> <span class='hs-varid'>dirp</span>
|
|
<a name="line-140"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span> <span class='hs-varop'>==</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span>
|
|
<a name="line-141"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varid'>b'</span>
|
|
<a name="line-142"></a> <span class='hs-keyword'>else</span>
|
|
<a name="line-143"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span> <span class='hs-varop'>==</span> <span class='hs-str'>"."</span> <span class='hs-varop'>||</span> <span class='hs-varid'>e</span> <span class='hs-varop'>==</span> <span class='hs-str'>".."</span><span class='hs-layout'>)</span>
|
|
<a name="line-144"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>loop</span> <span class='hs-varid'>dirp</span> <span class='hs-varid'>b'</span>
|
|
<a name="line-145"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>f</span> <span class='hs-varid'>typ</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathRelToTop</span> <span class='hs-varop'></></span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>b'</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>loop</span> <span class='hs-varid'>dirp</span>
|
|
<a name="line-146"></a>
|
|
<a name="line-147"></a>
|
|
<a name="line-148"></a><span class='hs-comment'>----------------------------------------------------------</span>
|
|
<a name="line-149"></a><span class='hs-comment'>-- dodgy stuff</span>
|
|
<a name="line-150"></a>
|
|
<a name="line-151"></a><a name="CDir"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>CDir</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>()</span>
|
|
<a name="line-152"></a><a name="CDirent"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>CDirent</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>()</span>
|
|
<a name="line-153"></a>
|
|
<a name="line-154"></a><a name="unpackDirStream"></a><span class='hs-comment'>-- Posix doesn't export DirStream, so to re-use that type we need to use</span>
|
|
<a name="line-155"></a><span class='hs-comment'>-- unsafeCoerce. It's just a newtype, so this is a legitimate usage.</span>
|
|
<a name="line-156"></a><span class='hs-comment'>-- ugly trick.</span>
|
|
<a name="line-157"></a><span class='hs-definition'>unpackDirStream</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DirStream</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CDir</span>
|
|
<a name="line-158"></a><span class='hs-definition'>unpackDirStream</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafeCoerce</span>
|
|
<a name="line-159"></a>
|
|
<a name="line-160"></a><a name="packDirStream"></a><span class='hs-definition'>packDirStream</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CDir</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DirStream</span>
|
|
<a name="line-161"></a><span class='hs-definition'>packDirStream</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafeCoerce</span>
|
|
<a name="line-162"></a>
|
|
<a name="line-163"></a><span class='hs-comment'>-- the __hscore_* functions are defined in the unix package. We can import them and let</span>
|
|
<a name="line-164"></a><span class='hs-comment'>-- the linker figure it out.</span>
|
|
<a name="line-165"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"__hscore_readdir"</span>
|
|
<a name="line-166"></a> <span class='hs-varid'>c_readdir</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CDir</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>CDirent</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
|
|
<a name="line-167"></a>
|
|
<a name="line-168"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"__hscore_free_dirent"</span>
|
|
<a name="line-169"></a> <span class='hs-varid'>c_freeDirEnt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CDirent</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
|
|
<a name="line-170"></a>
|
|
<a name="line-171"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"__hscore_d_name"</span>
|
|
<a name="line-172"></a> <span class='hs-varid'>c_name</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CDirent</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CString</span>
|
|
<a name="line-173"></a>
|
|
<a name="line-174"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"__posixdir_d_type"</span>
|
|
<a name="line-175"></a> <span class='hs-varid'>c_type</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CDirent</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>DirType</span>
|
|
<a name="line-176"></a>
|
|
<a name="line-177"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"realpath"</span>
|
|
<a name="line-178"></a> <span class='hs-varid'>c_realpath</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CString</span>
|
|
<a name="line-179"></a>
|
|
<a name="line-180"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"fdopendir"</span>
|
|
<a name="line-181"></a> <span class='hs-varid'>c_fdopendir</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Fd</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
|
|
<a name="line-182"></a>
|
|
<a name="line-183"></a><span class='hs-comment'>----------------------------------------------------------</span>
|
|
<a name="line-184"></a><span class='hs-comment'>-- less dodgy but still lower-level</span>
|
|
<a name="line-185"></a>
|
|
<a name="line-186"></a>
|
|
<a name="line-187"></a><a name="readDirEnt"></a><span class='hs-definition'>readDirEnt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DirStream</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>DirType</span><span class='hs-layout'>,</span> <span class='hs-conid'>RawFilePath</span><span class='hs-layout'>)</span>
|
|
<a name="line-188"></a><span class='hs-definition'>readDirEnt</span> <span class='hs-layout'>(</span><span class='hs-varid'>unpackDirStream</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>dirp</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
|
|
<a name="line-189"></a> <span class='hs-varid'>alloca</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>ptr_dEnt</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>loop</span> <span class='hs-varid'>ptr_dEnt</span>
|
|
<a name="line-190"></a> <span class='hs-keyword'>where</span>
|
|
<a name="line-191"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>ptr_dEnt</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
|
|
<a name="line-192"></a> <span class='hs-varid'>resetErrno</span>
|
|
<a name="line-193"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>c_readdir</span> <span class='hs-varid'>dirp</span> <span class='hs-varid'>ptr_dEnt</span>
|
|
<a name="line-194"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span>
|
|
<a name="line-195"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span>
|
|
<a name="line-196"></a> <span class='hs-varid'>dEnt</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peek</span> <span class='hs-varid'>ptr_dEnt</span>
|
|
<a name="line-197"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>dEnt</span> <span class='hs-varop'>==</span> <span class='hs-varid'>nullPtr</span><span class='hs-layout'>)</span>
|
|
<a name="line-198"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>dtUnknown</span><span class='hs-layout'>,</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
|
|
<a name="line-199"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
|
|
<a name="line-200"></a> <span class='hs-varid'>dName</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>c_name</span> <span class='hs-varid'>dEnt</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>peekFilePath</span>
|
|
<a name="line-201"></a> <span class='hs-varid'>dType</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>c_type</span> <span class='hs-varid'>dEnt</span>
|
|
<a name="line-202"></a> <span class='hs-varid'>c_freeDirEnt</span> <span class='hs-varid'>dEnt</span>
|
|
<a name="line-203"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>dType</span><span class='hs-layout'>,</span> <span class='hs-varid'>dName</span><span class='hs-layout'>)</span>
|
|
<a name="line-204"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
|
|
<a name="line-205"></a> <span class='hs-varid'>errno</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getErrno</span>
|
|
<a name="line-206"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>errno</span> <span class='hs-varop'>==</span> <span class='hs-varid'>eINTR</span><span class='hs-layout'>)</span>
|
|
<a name="line-207"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>loop</span> <span class='hs-varid'>ptr_dEnt</span>
|
|
<a name="line-208"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
|
|
<a name="line-209"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-conid'>Errno</span> <span class='hs-varid'>eo</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>errno</span>
|
|
<a name="line-210"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>eo</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span>
|
|
<a name="line-211"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>dtUnknown</span><span class='hs-layout'>,</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
|
|
<a name="line-212"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>throwErrno</span> <span class='hs-str'>"readDirEnt"</span>
|
|
<a name="line-213"></a>
|
|
<a name="line-214"></a>
|
|
<a name="line-215"></a><a name="getDirectoryContents"></a><span class='hs-comment'>-- |Gets all directory contents (not recursively).</span>
|
|
<a name="line-216"></a><span class='hs-definition'>getDirectoryContents</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RawFilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>DirType</span><span class='hs-layout'>,</span> <span class='hs-conid'>RawFilePath</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
|
|
<a name="line-217"></a><span class='hs-definition'>getDirectoryContents</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span>
|
|
<a name="line-218"></a> <span class='hs-varid'>modifyIOError</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>`ioeSetFileName`</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span>
|
|
<a name="line-219"></a> <span class='hs-layout'>(</span><span class='hs-varop'>`ioeSetLocation`</span> <span class='hs-str'>"System.Posix.Directory.Traversals.getDirectoryContents"</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
|
|
<a name="line-220"></a> <span class='hs-varid'>bracket</span>
|
|
<a name="line-221"></a> <span class='hs-layout'>(</span><span class='hs-conid'>PosixBS</span><span class='hs-varop'>.</span><span class='hs-varid'>openDirStream</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span>
|
|
<a name="line-222"></a> <span class='hs-conid'>PosixBS</span><span class='hs-varop'>.</span><span class='hs-varid'>closeDirStream</span>
|
|
<a name="line-223"></a> <span class='hs-sel'>_dirloop</span>
|
|
<a name="line-224"></a>
|
|
<a name="line-225"></a>
|
|
<a name="line-226"></a><a name="fdOpendir"></a><span class='hs-comment'>-- |Binding to @fdopendir(3)@.</span>
|
|
<a name="line-227"></a><span class='hs-definition'>fdOpendir</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Fd</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>DirStream</span>
|
|
<a name="line-228"></a><span class='hs-definition'>fdOpendir</span> <span class='hs-varid'>fd</span> <span class='hs-keyglyph'>=</span>
|
|
<a name="line-229"></a> <span class='hs-varid'>packDirStream</span> <span class='hs-varop'><$></span> <span class='hs-varid'>throwErrnoIfNull</span> <span class='hs-str'>"fdOpendir"</span> <span class='hs-layout'>(</span><span class='hs-varid'>c_fdopendir</span> <span class='hs-varid'>fd</span><span class='hs-layout'>)</span>
|
|
<a name="line-230"></a>
|
|
<a name="line-231"></a>
|
|
<a name="line-232"></a><a name="getDirectoryContents'"></a><span class='hs-comment'>-- |Like `getDirectoryContents` except for a file descriptor.</span>
|
|
<a name="line-233"></a><span class='hs-comment'>--</span>
|
|
<a name="line-234"></a><span class='hs-comment'>-- To avoid complicated error checks, the file descriptor is</span>
|
|
<a name="line-235"></a><span class='hs-comment'>-- __always__ closed, even if `fdOpendir` fails. Usually, this</span>
|
|
<a name="line-236"></a><span class='hs-comment'>-- only happens on successful `fdOpendir` and after the directory</span>
|
|
<a name="line-237"></a><span class='hs-comment'>-- stream is closed. Also see the manpage of @fdopendir(3)@ for</span>
|
|
<a name="line-238"></a><span class='hs-comment'>-- more details.</span>
|
|
<a name="line-239"></a><span class='hs-definition'>getDirectoryContents'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Fd</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>DirType</span><span class='hs-layout'>,</span> <span class='hs-conid'>RawFilePath</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
|
|
<a name="line-240"></a><span class='hs-definition'>getDirectoryContents'</span> <span class='hs-varid'>fd</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-241"></a> <span class='hs-varid'>dirstream</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fdOpendir</span> <span class='hs-varid'>fd</span> <span class='hs-varop'>`catchIOError`</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
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<a name="line-242"></a> <span class='hs-varid'>closeFd</span> <span class='hs-varid'>fd</span>
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<a name="line-243"></a> <span class='hs-varid'>ioError</span> <span class='hs-varid'>e</span>
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<a name="line-244"></a> <span class='hs-comment'>-- closeDirStream closes the filedescriptor</span>
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<a name="line-245"></a> <span class='hs-varid'>finally</span> <span class='hs-layout'>(</span><span class='hs-sel'>_dirloop</span> <span class='hs-varid'>dirstream</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>PosixBS</span><span class='hs-varop'>.</span><span class='hs-varid'>closeDirStream</span> <span class='hs-varid'>dirstream</span><span class='hs-layout'>)</span>
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<a name="line-246"></a>
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<a name="line-247"></a>
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<a name="line-248"></a><span class='hs-sel'>_dirloop</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DirStream</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>DirType</span><span class='hs-layout'>,</span> <span class='hs-conid'>RawFilePath</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
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<a name="line-249"></a><span class='hs-comment'>{-# INLINE _dirloop #-}</span>
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<a name="line-250"></a><span class='hs-sel'>_dirloop</span> <span class='hs-varid'>dirp</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
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<a name="line-251"></a> <span class='hs-varid'>t</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-sel'>_typ</span><span class='hs-layout'>,</span><span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readDirEnt</span> <span class='hs-varid'>dirp</span>
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<a name="line-252"></a> <span class='hs-keyword'>if</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
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<a name="line-253"></a> <span class='hs-varid'>es</span> <span class='hs-keyglyph'><-</span> <span class='hs-sel'>_dirloop</span> <span class='hs-varid'>dirp</span>
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<a name="line-254"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>t</span><span class='hs-conop'>:</span><span class='hs-varid'>es</span><span class='hs-layout'>)</span>
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<a name="line-255"></a>
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<a name="line-256"></a>
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<a name="line-257"></a><a name="realpath"></a><span class='hs-comment'>-- | return the canonicalized absolute pathname</span>
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<a name="line-258"></a><span class='hs-comment'>--</span>
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<a name="line-259"></a><span class='hs-comment'>-- like canonicalizePath, but uses @realpath(3)@</span>
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<a name="line-260"></a><span class='hs-definition'>realpath</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RawFilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>RawFilePath</span>
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<a name="line-261"></a><span class='hs-definition'>realpath</span> <span class='hs-varid'>inp</span> <span class='hs-keyglyph'>=</span>
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<a name="line-262"></a> <span class='hs-varid'>allocaBytes</span> <span class='hs-varid'>pathMax</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>tmp</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
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<a name="line-263"></a> <span class='hs-varid'>void</span> <span class='hs-varop'>$</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>useAsCString</span> <span class='hs-varid'>inp</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>cstr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>throwErrnoIfNull</span> <span class='hs-str'>"realpath"</span> <span class='hs-varop'>$</span> <span class='hs-varid'>c_realpath</span> <span class='hs-varid'>cstr</span> <span class='hs-varid'>tmp</span>
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<a name="line-264"></a> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>packCString</span> <span class='hs-varid'>tmp</span>
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</pre></body>
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</html>
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