The program traverse

traverse is a multithreaded program similar to walk. Given more than one directory name on the command line, traverse creates separate threads to walk each directory, adds each filename to a list and later prints the filenames once all the directories have been traversed and read.

   $ traverse x/a x/b
   x/a/file1
   x/a/file2
   x/a/file3
   x/a/dir/file1
   x/a/dir/file2
   x/a/dir/file3
   x/b/file1
   x/b/file2
   x/b/file3