The patch titled
VT notifier extension for accessibility
has been added to the -mm tree. Its filename is
vt-notifier-extension-for-accessibility.patch
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------------------------------------------------------
Subject: VT notifier extension for accessibility
From: Karl Dahlke <[EMAIL PROTECTED]>
Some accessibility modules need to be able to catch the output on the
console before the VT interpretation, and possibly swallow it.
Signed-off-by: Samuel Thibault <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/char/vt.c | 7 +++++++
include/linux/notifier.h | 1 +
2 files changed, 8 insertions(+)
diff -puN drivers/char/vt.c~vt-notifier-extension-for-accessibility
drivers/char/vt.c
--- a/drivers/char/vt.c~vt-notifier-extension-for-accessibility
+++ a/drivers/char/vt.c
@@ -2053,6 +2053,7 @@ static int do_con_write(struct tty_struc
unsigned long draw_from = 0, draw_to = 0;
struct vc_data *vc;
unsigned char vc_attr;
+ struct vt_notifier_param param;
uint8_t rescan;
uint8_t inverse;
uint8_t width;
@@ -2112,6 +2113,8 @@ static int do_con_write(struct tty_struc
if (IS_FG(vc))
hide_cursor(vc);
+ param.vc = vc;
+
while (!tty->stopped && count) {
int orig = *buf;
c = orig;
@@ -2200,6 +2203,10 @@ rescan_last_byte:
tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
}
+ param.c = tc;
+ if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
¶m) == NOTIFY_STOP)
+ continue;
+
/* If the original code was a control character we
* only allow a glyph to be displayed if the code is
* not normally used (such as for cursor movement) or
diff -puN include/linux/notifier.h~vt-notifier-extension-for-accessibility
include/linux/notifier.h
--- a/include/linux/notifier.h~vt-notifier-extension-for-accessibility
+++ a/include/linux/notifier.h
@@ -247,6 +247,7 @@ extern struct blocking_notifier_head reb
#define VT_DEALLOCATE 0x0002 /* Console will be deallocated */
#define VT_WRITE 0x0003 /* A char got output */
#define VT_UPDATE 0x0004 /* A bigger update occurred */
+#define VT_PREWRITE 0x0005 /* A char is about to be written to the
console */
#endif /* __KERNEL__ */
#endif /* _LINUX_NOTIFIER_H */
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
input-put-ledstate-in-the-keyboard-notifier.patch
vt-notifier-extension-for-accessibility.patch
vt-notifier-extension-for-accessibility-checkpatch-fixes.patch
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