====== UNIX File Types ======
|                           ^ Indicator in ls(1) ^ Get file descriptor                             ^ Create on file system         ^
^ Regular File              | -                  | **open(2)**                                     | **open(2)**                   |
^ Directory                 | d                  | **open(2)**                                     | **mkdir(2)**                  |
^ Symbolic Link             | l                  | - ((Linux does supports **open(2)** symbolic links by specifying flags ''O_NOFOLLOW'' and ''O_PATH'', since version 2.6.39)) | **symlink(2)**                |
^ Block or Character Device | b or c             | **open(2)**                                     | **mknod(2)**                  |
^ Pipe                      | p                  | **open(2)**, **pipe(2)**                        | **mknod(2)** or **mkfifo(2)** ((Some kernels having **mkfifo(2)** system call to create named pipes, thus **mknod(2)** can't be used)) |
^ Socket                    | s                  | **socket(2)**, **accept(2)**, **socketpair(2)** | **bind(2)**                   |