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<title>src/System/PosixCompat/Temp.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE ForeignFunctionInterface #-}</span>
<a name="line-3"></a>
<a name="line-4"></a><span class='hs-comment'>{-|
<a name="line-5"></a>This module makes the operations exported by @System.Posix.Temp@
<a name="line-6"></a>available on all platforms. On POSIX systems it re-exports operations from
<a name="line-7"></a>@System.Posix.Temp@, on other platforms it emulates the operations as far
<a name="line-8"></a>as possible.
<a name="line-9"></a>-}</span>
<a name="line-10"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>PosixCompat</span><span class='hs-varop'>.</span><span class='hs-conid'>Temp</span> <span class='hs-layout'>(</span>
<a name="line-11"></a> <span class='hs-varid'>mkstemp</span>
<a name="line-12"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-cpp'>#ifndef mingw32_HOST_OS</span>
<a name="line-15"></a><span class='hs-comment'>-- Re-export unix package</span>
<a name="line-16"></a>
<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'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Temp</span>
<a name="line-18"></a>
<a name="line-19"></a><span class='hs-cpp'>#elif defined(__GLASGOW_HASKELL__)</span>
<a name="line-20"></a><span class='hs-comment'>-- Windows w/ GHC, we have fdToHandle so we</span>
<a name="line-21"></a><span class='hs-comment'>-- can use our own implementation of mkstemp.</span>
<a name="line-22"></a>
<a name="line-23"></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-layout'>(</span><span class='hs-conid'>Handle</span><span class='hs-layout'>)</span>
<a name="line-24"></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-layout'>(</span><span class='hs-conid'>CInt</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>CString</span><span class='hs-layout'>,</span> <span class='hs-varid'>withCString</span><span class='hs-layout'>,</span> <span class='hs-varid'>peekCString</span><span class='hs-layout'>,</span> <span class='hs-varid'>throwErrnoIfMinus1</span><span class='hs-layout'>)</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Handle</span><span class='hs-varop'>.</span><span class='hs-conid'>FD</span> <span class='hs-layout'>(</span><span class='hs-varid'>fdToHandle</span><span class='hs-layout'>)</span>
<a name="line-26"></a>
<a name="line-27"></a><a name="mkstemp"></a><span class='hs-comment'>-- | 'mkstemp' - make a unique filename and open it for</span>
<a name="line-28"></a><span class='hs-comment'>-- reading\/writing.</span>
<a name="line-29"></a><span class='hs-comment'>-- The returned 'FilePath' is the (possibly relative) path of</span>
<a name="line-30"></a><span class='hs-comment'>-- the created file, which is padded with 6 random characters.</span>
<a name="line-31"></a><span class='hs-definition'>mkstemp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>FilePath</span><span class='hs-layout'>,</span> <span class='hs-conid'>Handle</span><span class='hs-layout'>)</span>
<a name="line-32"></a><span class='hs-definition'>mkstemp</span> <span class='hs-varid'>template</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-33"></a> <span class='hs-varid'>withCString</span> <span class='hs-varid'>template</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-34"></a> <span class='hs-varid'>fd</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>throwErrnoIfMinus1</span> <span class='hs-str'>"mkstemp"</span> <span class='hs-layout'>(</span><span class='hs-varid'>c_mkstemp</span> <span class='hs-varid'>ptr</span><span class='hs-layout'>)</span>
<a name="line-35"></a> <span class='hs-varid'>name</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekCString</span> <span class='hs-varid'>ptr</span>
<a name="line-36"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fdToHandle</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>fd</span><span class='hs-layout'>)</span>
<a name="line-37"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>name</span><span class='hs-layout'>,</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-38"></a>
<a name="line-39"></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'>"unixcompat_mkstemp"</span>
<a name="line-40"></a> <span class='hs-varid'>c_mkstemp</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'>CInt</span>
<a name="line-41"></a>
<a name="line-42"></a><span class='hs-cpp'>#else</span>
<a name="line-43"></a><span class='hs-comment'>-- Windows w/o GHC, we don't have fdToHandle :(</span>
<a name="line-44"></a>
<a name="line-45"></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-layout'>(</span><span class='hs-conid'>Handle</span><span class='hs-layout'>)</span>
<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'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkIOError</span><span class='hs-layout'>,</span> <span class='hs-varid'>illegalOperationErrorType</span><span class='hs-layout'>)</span>
<a name="line-47"></a>
<a name="line-48"></a><span class='hs-definition'>mkstemp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>FilePath</span><span class='hs-layout'>,</span> <span class='hs-conid'>Handle</span><span class='hs-layout'>)</span>
<a name="line-49"></a><span class='hs-definition'>mkstemp</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ioError</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mkIOError</span> <span class='hs-varid'>illegalOperationErrorType</span> <span class='hs-varid'>x</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span>
<a name="line-50"></a> <span class='hs-keyword'>where</span>
<a name="line-51"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"System.PosixCompat.Temp.mkstemp: not supported"</span>
<a name="line-52"></a>
<a name="line-53"></a><span class='hs-cpp'>#endif</span>
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