No, but it is with ( sleep 10 ; hostile ) & su The problem exists when an process with superuser privileges is running a program that reads command in

No, but it is with ( sleep 10 ; hostile ) & su The problem exists when an process with superuser privileges is running a program that reads command input interactively from the terminal at the same time that an unprivileged process has an unrevoked open file descriptor to the same terminal device.