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>System.Posix.Directory</TITLE
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>unix-2.3.2.0: POSIX functionality</TD
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>Contents</A
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>System.Posix.Directory</FONT
></TD
><TD ALIGN="right"
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><TR
><TD CLASS="infohead"
>Portability</TD
><TD CLASS="infoval"
>non-portable (requires POSIX)</TD
></TR
><TR
><TD CLASS="infohead"
>Stability</TD
><TD CLASS="infoval"
>provisional</TD
></TR
><TR
><TD CLASS="infohead"
>Maintainer</TD
><TD CLASS="infoval"
>libraries@haskell.org</TD
></TR
></TABLE
></TD
></TR
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></TD
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><TD CLASS="section4"
><B
>Contents</B
></TD
></TR
><TR
><TD
><DL
><DT
><A HREF="#1"
>Creating and removing directories
</A
></DT
><DT
><A HREF="#2"
>Reading directories
</A
></DT
><DT
><A HREF="#3"
>The working dirctory
</A
></DT
></DL
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Description</TD
></TR
><TR
><TD CLASS="doc"
>POSIX directory support
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Synopsis</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="#v%3AcreateDirectory"
>createDirectory</A
> :: <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
> -&gt; <A HREF="../base/System-Posix-Types.html#t%3AFileMode"
>FileMode</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AremoveDirectory"
>removeDirectory</A
> :: <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A HREF="#t%3ADirStream"
>DirStream</A
> </TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AopenDirStream"
>openDirStream</A
> :: <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AreadDirStream"
>readDirStream</A
> :: <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3ArewindDirStream"
>rewindDirStream</A
> :: <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AcloseDirStream"
>closeDirStream</A
> :: <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A HREF="#t%3ADirStreamOffset"
>DirStreamOffset</A
> </TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AtellDirStream"
>tellDirStream</A
> :: <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="System-Posix-Directory.html#t%3ADirStreamOffset"
>DirStreamOffset</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AseekDirStream"
>seekDirStream</A
> :: <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
> -&gt; <A HREF="System-Posix-Directory.html#t%3ADirStreamOffset"
>DirStreamOffset</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AgetWorkingDirectory"
>getWorkingDirectory</A
> :: <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AchangeWorkingDirectory"
>changeWorkingDirectory</A
> :: <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AchangeWorkingDirectoryFd"
>changeWorkingDirectoryFd</A
> :: <A HREF="../base/System-Posix-Types.html#t%3AFd"
>Fd</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
><A NAME="1"
><A NAME="1"
>Creating and removing directories
</A
></A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:createDirectory"
><A NAME="v%3AcreateDirectory"
></A
></A
><B
>createDirectory</B
> :: <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
> -&gt; <A HREF="../base/System-Posix-Types.html#t%3AFileMode"
>FileMode</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="doc"
><TT
>createDirectory dir mode</TT
> calls <TT
>mkdir</TT
> to 
   create a new directory, <TT
>dir</TT
>, with permissions based on
  <TT
>mode</TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:removeDirectory"
><A NAME="v%3AremoveDirectory"
></A
></A
><B
>removeDirectory</B
> :: <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
><A NAME="2"
><A NAME="2"
>Reading directories
</A
></A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:DirStream"
><A NAME="t%3ADirStream"
></A
></A
><B
>DirStream</B
>  </TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:openDirStream"
><A NAME="v%3AopenDirStream"
></A
></A
><B
>openDirStream</B
> :: <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
></TD
></TR
><TR
><TD CLASS="doc"
><TT
>openDirStream dir</TT
> calls <TT
>opendir</TT
> to obtain a
   directory stream for <TT
>dir</TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:readDirStream"
><A NAME="v%3AreadDirStream"
></A
></A
><B
>readDirStream</B
> :: <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
></TD
></TR
><TR
><TD CLASS="doc"
><TT
>readDirStream dp</TT
> calls <TT
>readdir</TT
> to obtain the
   next directory entry (<TT
>struct dirent</TT
>) for the open directory
   stream <TT
>dp</TT
>, and returns the <TT
>d_name</TT
> member of that
  structure.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:rewindDirStream"
><A NAME="v%3ArewindDirStream"
></A
></A
><B
>rewindDirStream</B
> :: <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="doc"
><TT
>rewindDirStream dp</TT
> calls <TT
>rewinddir</TT
> to reposition
   the directory stream <TT
>dp</TT
> at the beginning of the directory.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:closeDirStream"
><A NAME="v%3AcloseDirStream"
></A
></A
><B
>closeDirStream</B
> :: <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="doc"
><TT
>closeDirStream dp</TT
> calls <TT
>closedir</TT
> to close
   the directory stream <TT
>dp</TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:DirStreamOffset"
><A NAME="t%3ADirStreamOffset"
></A
></A
><B
>DirStreamOffset</B
>  </TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:tellDirStream"
><A NAME="v%3AtellDirStream"
></A
></A
><B
>tellDirStream</B
> :: <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="System-Posix-Directory.html#t%3ADirStreamOffset"
>DirStreamOffset</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:seekDirStream"
><A NAME="v%3AseekDirStream"
></A
></A
><B
>seekDirStream</B
> :: <A HREF="System-Posix-Directory.html#t%3ADirStream"
>DirStream</A
> -&gt; <A HREF="System-Posix-Directory.html#t%3ADirStreamOffset"
>DirStreamOffset</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
><A NAME="3"
><A NAME="3"
>The working dirctory
</A
></A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:getWorkingDirectory"
><A NAME="v%3AgetWorkingDirectory"
></A
></A
><B
>getWorkingDirectory</B
> :: <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
></TD
></TR
><TR
><TD CLASS="doc"
><TT
>getWorkingDirectory</TT
> calls <TT
>getcwd</TT
> to obtain the name
   of the current working directory.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:changeWorkingDirectory"
><A NAME="v%3AchangeWorkingDirectory"
></A
></A
><B
>changeWorkingDirectory</B
> :: <A HREF="../base/System-IO.html#t%3AFilePath"
>FilePath</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="doc"
><TT
>changeWorkingDirectory dir</TT
> calls <TT
>chdir</TT
> to change
   the current working directory to <TT
>dir</TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:changeWorkingDirectoryFd"
><A NAME="v%3AchangeWorkingDirectoryFd"
></A
></A
><B
>changeWorkingDirectoryFd</B
> :: <A HREF="../base/System-Posix-Types.html#t%3AFd"
>Fd</A
> -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
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