Colored kernel message output Let's work more on Linux's cuteness! [http://lkml.org/lkml/2007/10/4/431] The following patch makes it possible to give kernel messages a selectable color which helps to distinguish it from other noise, such as boot messages. NetBSD has it, OpenBSD has it, FreeBSD to some extent, so I think Linux should too.
Inspired by cko (http://freshmeat.net/p/cko/), but independently written, later contributed forth and back. Already posted at: http://lkml.org/lkml/2007/4/1/162 Signed-off-by: Jan Engelhardt <[EMAIL PROTECTED]> --- drivers/char/Kconfig | 29 +++++++++++++++++++++++++++++ drivers/char/vt.c | 14 ++++++++++++++ 2 files changed, 43 insertions(+) Index: linux-2.6.23/drivers/char/Kconfig =================================================================== --- linux-2.6.23.orig/drivers/char/Kconfig +++ linux-2.6.23/drivers/char/Kconfig @@ -58,6 +58,35 @@ config VT_CONSOLE If unsure, say Y. +config VT_PRINTK_COLOR + hex "Colored kernel message output" + range 0x00 0xFF + depends on VT_CONSOLE + default 0x17 + ---help--- + This option will give you ability to change the color of + kernel messages printed to the console. + + The value you need to enter here is the ASCII color value + composed (OR'ed) by one foreground color, one background + color and any number of attributes as follows: + + Foreground: + 0x00=black, 0x01=blue, 0x02=green, 0x03=green, + 0x04=red, 0x05=magenta, 0x06=brown, 0x07=gray + + Background: + 0x00=black, 0x10=blue, 0x20=green, 0x30=green, + 0x40=red, 0x50=magenta, 0x60=brown, 0x70=gray + + Attributes: + 0x08=highlight foreground + + Thus, 0x17 will yield gray-on-blue like in OpenBSD and + 0x02 green-on-black like in NetBSD. + Using "highlight foreground" is said not work when you use + VGA Console (Framebuffer not affected) with a 512-glyph font. + config HW_CONSOLE bool depends on VT && !S390 && !UML Index: linux-2.6.23/drivers/char/vt.c =================================================================== --- linux-2.6.23.orig/drivers/char/vt.c +++ linux-2.6.23/drivers/char/vt.c @@ -73,6 +73,7 @@ */ #include <linux/module.h> +#include <linux/moduleparam.h> #include <linux/types.h> #include <linux/sched.h> #include <linux/tty.h> @@ -2348,6 +2349,9 @@ struct tty_driver *console_driver; #ifdef CONFIG_VT_CONSOLE +static unsigned int printk_color = CONFIG_VT_PRINTK_COLOR; +module_param(printk_color, uint, S_IRUGO | S_IWUSR); + /* * Console on virtual terminal * @@ -2388,12 +2392,16 @@ static void vt_console_print(struct cons hide_cursor(vc); start = (ushort *)vc->vc_pos; + vc->vc_color = printk_color; + update_attr(vc); /* Contrived structure to try to emulate original need_wrap behaviour * Problems caused when we have need_wrap set on '\n' character */ while (count--) { c = *b++; if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { + vc->vc_color = vc->vc_def_color; + update_attr(vc); if (cnt > 0) { if (CON_IS_VISIBLE(vc)) vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); @@ -2406,6 +2414,8 @@ static void vt_console_print(struct cons bs(vc); start = (ushort *)vc->vc_pos; myx = vc->vc_x; + vc->vc_color = printk_color; + update_attr(vc); continue; } if (c != 13) @@ -2413,6 +2423,8 @@ static void vt_console_print(struct cons cr(vc); start = (ushort *)vc->vc_pos; myx = vc->vc_x; + vc->vc_color = printk_color; + update_attr(vc); if (c == 10 || c == 13) continue; } @@ -2434,6 +2446,8 @@ static void vt_console_print(struct cons vc->vc_need_wrap = 1; } } + vc->vc_color = vc->vc_def_color; + update_attr(vc); set_cursor(vc); quit: - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
