--- busybox-1.20.0/loginutils/getty.c +++ busybox-1.20.0-getty/loginutils/getty.c @@ -561,8 +561,14 @@ int getty_main(int argc UNUSED_PARAM, ch */ fd = open("/dev/tty", O_RDWR | O_NONBLOCK); if (fd >= 0) { + /* TIOCNOTTY sends SIGHUP to the foreground + * process group - which may include us! + * Make sure to not die on it: + */ + sighandler_t old = signal(SIGHUP, SIG_IGN); ioctl(fd, TIOCNOTTY); close(fd); + signal(SIGHUP, old); } }