Re: [PATCH] powerpc: add new required termio functions

Tony Breeds
2007-09-12T02:33:34Z

On Tue, Sep 11, 2007 at 07:17:42PM -0700, Linus Torvalds wrote:

> Really?
>
> It shouldn't. The use of kernel_termios_to_user_termios_1() is conditional
> on the architecture having a define for TCGETS2, and I think they match
> up. I see:
>
> [torvalds@woody linux]$ git grep -l kernel_termios_to_user_termios_1 include | wc -l
> 10
> [torvalds@woody linux]$ git grep -l TCGETS2 include | wc -l
> 10
>
> and in neither case is ppc in that list of architecures.
>
> So maybe you just read the patch without actually testing whether it
> actually broke powerpc?
>
> Or is something subtler going on?

As far as I can see TIOCSLCKTRMIOS and TIOCGLCKTRMIOS aren't protected
by TCGETS2 guards. Do they need to be ... Perhaps

From: Tony Breeds <tony@bakeyournoodle.com>

Add Guards around TIOCSLCKTRMIOS and TIOCGLCKTRMIOS.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>

---

drivers/char/tty_ioctl.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
index 4a8969c..3ee73cf 100644
--- a/drivers/char/tty_ioctl.c
+++ b/drivers/char/tty_ioctl.c
@@ -795,6 +795,19 @@ int n_tty_ioctl(struct tty_struct * tty, struct file * file,
if (L_ICANON(tty))
retval = inq_canon(tty);
return put_user(retval, (unsigned int __user *) arg);
+#ifndef TCGETS2
+ case TIOCGLCKTRMIOS:
+ if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios_locked))
+ return -EFAULT;
+ return 0;
+
+ case TIOCSLCKTRMIOS:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (user_termios_to_kernel_termios(real_tty->termios_locked, (struct termios __user *) arg))
+ return -EFAULT;
+ return 0;
+#else
case TIOCGLCKTRMIOS:
if (kernel_termios_to_user_termios_1((struct termios __user *)arg, real_tty->termios_locked))
return -EFAULT;
@@ -806,6 +819,7 @@ int n_tty_ioctl(struct tty_struct * tty, struct file * file,
if (user_termios_to_kernel_termios_1(real_tty->termios_locked, (struct termios __user *) arg))
return -EFAULT;
return 0;
+#endif

case TIOCPKT:
{

Yours Tony

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