[PATCH] kbd_mode: support Disabled mode (K_OFF)

[PATCH] kbd_mode: support Disabled mode (K_OFF)

[shrik3]

From: Tianhao Wang <shrik3@mailbox.org>

Since linux 2.6.39 KDGKBMODE could have K_OFF (0x04), the Disabled mode.
This may be set by e.g. Xorg that doesn't read /dev/tty

Reference: https://lore.kernel.org/all/AANLkTikZe1EuvNQHceNUdKFpmmeAbQG8H+34AG9fw43u@mail.gmail.com/

Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
---
 src/kbd_mode.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/kbd_mode.c b/src/kbd_mode.c
index 9a4aff3..f37c321 100644
--- a/src/kbd_mode.c
+++ b/src/kbd_mode.c
@@ -16,9 +16,14 @@
 #include <sysexits.h>
 #include <sys/ioctl.h>
 #include <linux/kd.h>
+#include <linux/version.h>
 
 #include "libcommon.h"
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39)
+#define HAS_K_OFF
+#endif
+
 static void KBD_ATTR_NORETURN
 usage(int rc, const struct kbd_help *options)
 {
@@ -48,6 +53,11 @@ fprint_mode(FILE *stream, int  mode)
 		case K_UNICODE:
 			fprintf(stream, _("The keyboard is in Unicode (UTF-8) mode"));
 			break;
+#ifdef HAS_K_OFF
+		case K_OFF:
+			fprintf(stream, _("The keyboard is in Disabled mode, perhaps you are using a graphical environment?"));
+			break;
+#endif
 		default:
 			fprintf(stream, _("The keyboard is in some unknown mode"));
 	}
-- 
2.48.1

Re: [PATCH] kbd_mode: support Disabled mode (K_OFF)

[Alexey Gladkov]

On Mon, Feb 03, 2025 at 06:47:31PM +0100, shrik3@mailbox.org wrote:
> From: Tianhao Wang <shrik3@mailbox.org>
> 
> Since linux 2.6.39 KDGKBMODE could have K_OFF (0x04), the Disabled mode.
> This may be set by e.g. Xorg that doesn't read /dev/tty
> 
> Reference: https://lore.kernel.org/all/AANLkTikZe1EuvNQHceNUdKFpmmeAbQG8H+34AG9fw43u@mail.gmail.com/
> 
> Signed-off-by: Tianhao Wang <shrik3@mailbox.org>

Applied. Thanks.

> ---
>  src/kbd_mode.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/src/kbd_mode.c b/src/kbd_mode.c
> index 9a4aff3..f37c321 100644
> --- a/src/kbd_mode.c
> +++ b/src/kbd_mode.c
> @@ -16,9 +16,14 @@
>  #include <sysexits.h>
>  #include <sys/ioctl.h>
>  #include <linux/kd.h>
> +#include <linux/version.h>
>  
>  #include "libcommon.h"
>  
> +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39)
> +#define HAS_K_OFF
> +#endif
> +
>  static void KBD_ATTR_NORETURN
>  usage(int rc, const struct kbd_help *options)
>  {
> @@ -48,6 +53,11 @@ fprint_mode(FILE *stream, int  mode)
>  		case K_UNICODE:
>  			fprintf(stream, _("The keyboard is in Unicode (UTF-8) mode"));
>  			break;
> +#ifdef HAS_K_OFF
> +		case K_OFF:
> +			fprintf(stream, _("The keyboard is in Disabled mode, perhaps you are using a graphical environment?"));
> +			break;
> +#endif
>  		default:
>  			fprintf(stream, _("The keyboard is in some unknown mode"));
>  	}
> -- 
> 2.48.1
> 
> 

-- 
Rgrds, legion