diff options
| author | Karl Dahlke <eklhad@comcast.net> | 2008-04-28 11:14:25 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-28 17:58:32 +0200 |
| commit | 0341a4d0fdd2a0a3d9e2bb3a9afef9f8292c8502 (patch) | |
| tree | e073b06ad0d0e4a7d3aaed487db0655feadb31bb /drivers | |
| parent | mfd: use shorter set_current_state() (diff) | |
| download | linux-0341a4d0fdd2a0a3d9e2bb3a9afef9f8292c8502.tar.xz linux-0341a4d0fdd2a0a3d9e2bb3a9afef9f8292c8502.zip | |
VT notifier extension for accessibility
Some accessibility modules need to be able to catch the output on the
console before the VT interpretation, and possibly swallow it.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/vt.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/char/vt.c b/drivers/char/vt.c index 9b58b894f823..df4c3ead9e2b 100644 --- a/drivers/char/vt.c +++ b/drivers/char/vt.c @@ -2054,6 +2054,7 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co 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; @@ -2113,6 +2114,8 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co if (IS_FG(vc)) hide_cursor(vc); + param.vc = vc; + while (!tty->stopped && count) { int orig = *buf; c = orig; @@ -2201,6 +2204,11 @@ 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 |