null    c 1 3 666
zero    c 1 5 666
full    c 1 7 666
random  c 1 8 644
urandom c 1 9 644
tty     c 5 0 666
ptmx    c 5 2 666
fd      l /proc/self/fd 777
stdin   l fd/0 777
stdout  l fd/1 777
stderr  l fd/2 777
shm     d 1777
