Re: [TTY] exclusive mode question

[Frederik Deweerdt]

Le 09/06/05 10:49 +0200, moreau francis écrivit:
> Hi
> 
> When a process open a tty in exclusive mode (using ioctl(X, TIOCEXCL)), can the
> process be sure to be the only one using this tty ?
> If so I can't find in kernel code any checks in "tty_open" method for verifying
> that the tty has not been opened previously by another process when
> "TTY_EXCLUSIVE" flag is set.
> 
I've just greped and I found :

if (!retval && test_bit(TTY_EXCLUSIVE, &tty->flags) && !capable(CAP_SYS_ADMIN))
	retval = -EBUSY;
in drivers/char/tty_io.c:tty_open

Which sources are you looking at?

Regards,
Frederik Deweerdt

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