Hello Andreas,
thanks for your comments.
On Tue, Dec 16, 2008 at 10:36:55AM +0100, Andreas Schwab wrote:
> > + /* if ^0 is pressed again, reset
> > + * sysrq_pressed and flip ^0 char */
> The comment says ^0 twice when ^O is meant.
Correct. I have updated the comment.
> > + sysrq_pressed = (sysrq_pressed) ? 0 : 1;
> sysrq_pressed = !sysrc_pressed;
Ok, it might look better.
[PATCH v2] hvc_console: escape magic sysrq key
From: Hendrik Brueckner <brueck...@linux.vnet.ibm.com>
The ctrl-o (^O) is a common control key used by several applications like vim.
To allow users to send ^O to the terminal, this patch introduces a check
if ^O is pressed again if the sysrq_pressed variable is already set.
In this case, clear sysrq_pressed state and flip the ^O character to the tty.
(The old behavior has always set "sysrq_pressed" if ^O has been entered, and it
has not flipped the ^O character to the tty.)
Signed-off-by: Hendrik Brueckner <brueck...@linux.vnet.ibm.com>
---
drivers/char/hvc_console.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -642,8 +642,11 @@ int hvc_poll(struct hvc_struct *hp)
/* Handle the SysRq Hack */
/* XXX should support a sequence */
if (buf[i] == '\x0f') { /* ^O */
- sysrq_pressed = 1;
- continue;
+ /* if ^O is pressed again, reset
+ * sysrq_pressed and flip ^O char */
+ sysrq_pressed = !sysrq_pressed;
+ if (sysrq_pressed)
+ continue;
} else if (sysrq_pressed) {
handle_sysrq(buf[i], tty);
sysrq_pressed = 0;
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