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| author | Jan Engelhardt <jengelh@computergmbh.de> | 2008-04-29 09:59:46 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 17:06:06 +0200 |
| commit | c9e587abfdec2c2aaa55fab83bcb4972e2f84f9b (patch) | |
| tree | 86ab335b702608c90e9ce3dd759c1c96247a60d5 /include | |
| parent | directly use kmalloc() and kfree() in init/initramfs.c (diff) | |
| download | linux-c9e587abfdec2c2aaa55fab83bcb4972e2f84f9b.tar.xz linux-c9e587abfdec2c2aaa55fab83bcb4972e2f84f9b.zip | |
vt: fix background color on line feed
A command that causes a line feed while a background color is active,
such as
perl -e 'print "x" x 60, "\e[44m", "x" x 40, "\e[0m\n"'
and
perl -e 'print "x" x 40, "\e[44m\n", "x" x 40, "\e[0m\n"'
causes the line that was started as a result of the line feed to be completely
filled with the currently active background color instead of the default
color.
When scrolling, part of the current screen is memcpy'd/memmove'd to the new
region, and the new line(s) that will appear as a result are cleared using
memset. However, the lines are cleared with vc->vc_video_erase_char, causing
them to be colored with the currently active background color. This is
different from X11 terminal emulators which always paint the new lines with
the default background color (e.g. `xterm -bg black`).
The clear operation (\e[1J and \e[2J) also use vc_video_erase_char, so a new
vc->vc_scrl_erase_char is introduced with contains the erase character used
for scrolling, which is built from vc->vc_def_color instead of vc->vc_color.
Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/console_struct.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h index d71f7c0f931b..b03f80a078be 100644 --- a/include/linux/console_struct.h +++ b/include/linux/console_struct.h @@ -53,6 +53,7 @@ struct vc_data { unsigned short vc_hi_font_mask; /* [#] Attribute set for upper 256 chars of font or 0 if not supported */ struct console_font vc_font; /* Current VC font set */ unsigned short vc_video_erase_char; /* Background erase character */ + unsigned short vc_scrl_erase_char; /* Erase character for scroll */ /* VT terminal data */ unsigned int vc_state; /* Escape sequence parser state */ unsigned int vc_npar,vc_par[NPAR]; /* Parameters of current escape sequence */ |