[Haskell-cafe] [Beginner's Question] How to read filenames from a DirStream

Newbie's question: I want to ls the filenames of a directory. The program in C is something like: #include int main(){ DIR *dp; struct dirent *dirp; dp = opendir("/"); while((dirp = readdir(dp)) != NULL) printf("%s\n", dirp->d_name); closedir(dp); } and I write that in haskell: ----- import System.Posix import System.IO main = do dp <- openDirStream "/" df <- readDirStream dp putStrLn df closeDirStream dp ------ It can print the first entry of the dir, but how can we list it all like the C prog? map ? list comperhension?