Traditional sandbox first appeared in Unix in 1979, BSD shortly afterwards.
changes the meaning of "/" for a process (and its children). chroot("/tmp/jail")will disallow processes from getting out of the jail. And used to be the de-facto sandboxing utility
root 밖으로 벗어날 수 없음 일반적으로
하지만
escape_chroot.c
같은 파일로 탈옥가능탈옥했다는 거는 real root를 취득했다는 말
chroot pitfalls: previously open resources
Neither of the effects of chroot() do anything to previously-open resources.