Ah the magic of using a mailing list... I just realized that using getDirectoryContents lists the entry.
Still, a "doesLinkExist" function might be nice... On Wed, Aug 27, 2008 at 11:46 PM, Nicolas Frisby <[EMAIL PROTECTED]> wrote: > I think I've exhausted my options without catching exceptions. > > If I have an invalid symbolic link, how can I identify that it exists? > > (Sorry about the line wrap.) > > tmp$ ls -l # no tricks up my sleeve, empty directory > tmp$ touch foo > tmp$ ln -s foo bar > tmp$ ls -l > total 8 > lrwxr-xr-x 1 nfrisby nfrisby 3 Aug 27 23:29 bar -> foo > -rw-r--r-- 1 nfrisby nfrisby 0 Aug 27 23:29 foo > tmp$ ghc -e 'System.Directory.doesFileExist "bar"' > True > tmp$ rm foo > tmp$ ls -l > total 8 > lrwxr-xr-x 1 nfrisby nfrisby 3 Aug 27 23:29 bar -> foo > tmp$ ghc -e 'System.Directory.doesFileExist "bar"' # it follows > the broken link > False > tmp$ ghc -e 'System.Posix.Files.fileExist "bar"' # the > POSIX API also follows > False > tmp$ ghc -e 'System.Posix.Files.isSymbolicLink `fmap` > System.Posix.Files.getFileStatus "bar"' # so does this one POSIX API > also follows > *** Exception: bar: getFileStatus: does not exist (No such file or directory) > tmp$ ghc -e 'System.Posix.Files.isSymbolicLink `fmap` > System.Posix.Files.getSymbolicLinkStatus "bar"' # the most > successful so far > True > tmp$ rm bar # but it isn't an existence check... > tmp$ ls -l > tmp$ ghc -e 'System.Posix.Files.isSymbolicLink `fmap` > System.Posix.Files.getSymbolicLinkStatus "bar"' > *** Exception: bar: getSymbolicLinkStatus: does not exist (No such > file or directory) > > Is there a way to check for the existence of a symbolic link without > testing if getSymbolicLinkStatus raises an exception? > > This is with Darwin Kernel Version 8.11.1, GHC 6.8.2, > directory-1.0.0.0, and unix-2.3.0.0. > > Thanks. > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
