]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
[PATCH] vcsa attribute bits -> ioctl(VT_GETHIFONTMASK)
authorSamuel Thibault <samuel.thibault@ens-lyon.org>
Sun, 27 Aug 2006 08:23:39 +0000 (01:23 -0700)
committerLinus Torvalds <torvalds@g5.osdl.org>
Sun, 27 Aug 2006 18:01:29 +0000 (11:01 -0700)
commit533475d3d48eb839be2b57f6b020150abae91063
tree04145dcb5d7499fb2f8899a42ac0350c6e55203a
parentb8cf368944807e29b16b24588a2a35c829bc9d9a
[PATCH] vcsa attribute bits -> ioctl(VT_GETHIFONTMASK)

When reading /dev/vcsa while a font with more than 256 characters is
loaded, one of the attribute bits records the 9th bit of the character.
But depending on the console driver (vgacon or fbcon for instance), that's
bit 3 or bit 0.  And there is no way for userland to know that, thus no way
for userland to safely grab the screen content.  So here is a (tested)
patch:

Add a VT_GETHIFONTMASK ioctl for knowing which bit is the 9th bit for VC
text (vc_hi_font_mask field of the vc_data structure).

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/char/vt_ioctl.c
include/linux/compat_ioctl.h
include/linux/vt.h