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SubjectRe: [RFC][PATCH] vt: TIOCL to read kmsg_redirect from user space
Hi!

> The userland suspend tool we're working on needs to get the current value
> of kmsg_redirect from the kernel so that it can save it and restore it after
> resume. Unfortunetely there only is TIOCL_SETKMSGREDIRECT allowing us to
> set this value from the user space.
>
> The appended patch adds the "missing" TIOCL_GETKMSGREDIRECT that we
> need.

> Comments welcome.

Looks good to me.
Pavel

> drivers/char/vt.c | 4 ++++
> include/linux/tiocl.h | 1 +
> 2 files changed, 5 insertions(+)
>
> Index: linux-2.6.16-mm1/drivers/char/vt.c
> ===================================================================
> --- linux-2.6.16-mm1.orig/drivers/char/vt.c
> +++ linux-2.6.16-mm1/drivers/char/vt.c
> @@ -2328,6 +2328,10 @@ int tioclinux(struct tty_struct *tty, un
> case TIOCL_SETVESABLANK:
> set_vesa_blanking(p);
> break;
> + case TIOCL_GETKMSGREDIRECT:
> + data = kmsg_redirect;
> + ret = __put_user(data, p);
> + break;
> case TIOCL_SETKMSGREDIRECT:
> if (!capable(CAP_SYS_ADMIN)) {
> ret = -EPERM;
> Index: linux-2.6.16-mm1/include/linux/tiocl.h
> ===================================================================
> --- linux-2.6.16-mm1.orig/include/linux/tiocl.h
> +++ linux-2.6.16-mm1/include/linux/tiocl.h
> @@ -34,5 +34,6 @@ struct tiocl_selection {
> #define TIOCL_SCROLLCONSOLE 13 /* scroll console */
> #define TIOCL_BLANKSCREEN 14 /* keep screen blank even if a key is pressed */
> #define TIOCL_BLANKEDSCREEN 15 /* return which vt was blanked */
> +#define TIOCL_GETKMSGREDIRECT 17 /* get the vt the kernel messages are restricted to */
>
> #endif /* _LINUX_TIOCL_H */

--
Picture of sleeping (Linux) penguin wanted...
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