temporary-1.0: Portable temporary file and directory support for Windows and Unix, based on code from Cabal






:: FilePath

Temp dir to create the file in

-> String

File name template. See openTempFile.

-> (FilePath -> Handle -> IO a) 
-> IO a 

Use a temporary filename that doesn't already exist.

withTempDirectory :: FilePath -> String -> (FilePath -> IO a) -> IO aSource

Create and use a temporary directory.

Creates a new temporary directory inside the given directory, making use of the template. The temp directory is deleted after use. For example:

 withTempDirectory "src" "sdist." $ \tmpDir -> do ...

The tmpDir will be a new subdirectory of the given directory, e.g. src/sdist.342.



:: FilePath

Directory in which to create the file

-> String

File name template. If the template is "foo.ext" then the created file will be "fooXXX.ext" where XXX is some random number.

-> IO (FilePath, Handle) 

The function creates a temporary file in ReadWrite mode. The created file isn't deleted automatically, so you need to delete it manually.

The file is creates with permissions such that only the current user can read/write it.

With some exceptions (see below), the file will be created securely in the sense that an attacker should not be able to cause openTempFile to overwrite another file on the filesystem using your credentials, by putting symbolic links (on Unix) in the place where the temporary file is to be created. On Unix the O_CREAT and O_EXCL flags are used to prevent this attack, but note that O_EXCL is sometimes not supported on NFS filesystems, so if you rely on this behaviour it is best to use local filesystems only.

openBinaryTempFile :: FilePath -> String -> IO (FilePath, Handle)

Like openTempFile, but opens the file in binary mode. See openBinaryFile for more comments.