Hi： As I know .the /dev/tty is the current task's tty , which is stored to current->tty , My question is when does this value is assgined to current->tty ? Thanks! -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20130508/b1ef69f5/attachment.html