vhangup - virtually hangup the current tty
#include <unistd.h> int vhangup(void);
vhangup simulates a hangup on the current terminal. This call arranges for other users to have a "clean" tty at login time.
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
EPERM The user is not the super-user.
This call is Linux-specific, and should not be used in programs intended to be portable.