diff options
| author | Clemens Ladisch <clemens@ladisch.de> | 2013-08-04 13:09:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-05 15:06:46 +0800 |
| commit | 3855ae1c486a2d1b65a96fac8d504ef7197e62cd (patch) | |
| tree | 47e959acc495e5a24e04f5f69c2553915737ed93 | |
| parent | b2755b761a47ae42094bbab64d40490694ec08c3 (diff) | |
vt: make the default color configurable
The virtual console has (undocumented) module parameters to set the
colors for italic and underlined text, but the default text color was
hardcoded for some reason. This made it impossible to change the color
for startup messages, or to set the default for new virtual consoles.
Add a module parameter for that, and document the entire bunch.
Any hacker who thinks that a command prompt on a "black screen with
white font" is not supicious enough can now use the kernel parameter
vt.color=10 to get a nice, evil green.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/kernel-parameters.txt | 10 | ||||
| -rw-r--r-- | drivers/tty/vt/vt.c | 4 |
2 files changed, 13 insertions, 1 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 15356aca938..f6c8b417c65 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -3322,6 +3322,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. them quite hard to use for exploits but might break your system. + vt.color= [VT] Default text color. + Format: 0xYX, X = foreground, Y = background. + Default: 0x07 = light gray on black. + vt.cur_default= [VT] Default cursor shape. Format: 0xCCBBAA, where AA, BB, and CC are the same as the parameters of the <Esc>[?A;B;Cc escape sequence; @@ -3361,6 +3365,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted. overridden by individual drivers. 0 will hide cursors, 1 will display them. + vt.italic= [VT] Default color for italic text; 0-15. + Default: 2 = green. + + vt.underline= [VT] Default color for underlined text; 0-15. + Default: 3 = cyan. + watchdog timers [HW,WDT] For information on watchdog timers, see Documentation/watchdog/watchdog-parameters.txt or other driver-specific files in the diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 02af6ccefe6..9a8e8c5a0c7 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2809,8 +2809,10 @@ static void con_shutdown(struct tty_struct *tty) console_unlock(); } +static int default_color = 7; /* white */ static int default_italic_color = 2; // green (ASCII) static int default_underline_color = 3; // cyan (ASCII) +module_param_named(color, default_color, int, S_IRUGO | S_IWUSR); module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); @@ -2832,7 +2834,7 @@ static void vc_init(struct vc_data *vc, unsigned int rows, vc->vc_palette[k++] = default_grn[j] ; vc->vc_palette[k++] = default_blu[j] ; } - vc->vc_def_color = 0x07; /* white */ + vc->vc_def_color = default_color; vc->vc_ulcolor = default_underline_color; vc->vc_itcolor = default_italic_color; vc->vc_halfcolor = 0x08; /* grey */ |