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**************************************************************************
* The following are additional notes on all programs that print a colorized
* ("colourised") output, *color*.d.
*
* $Id: ALLcolors_notes.txt 58 2007-10-01 13:36:29Z brendan $
*
* COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
**************************************************************************
* The colors aren't working, I see rubbish characters
Try using a terminal that supports colors, such as gnome-terminal or dtterm.
The following text should test the spectrum of colors for your terminal.
Read this using "more" or "cat" (not "less" or "vim") to check if your
terminal will print colors, and what they will look like:
Color Test String Dark Background
---------------------------------------------------------
black [30mcolor test[0m [30;40mcolor test[0m
red [31mcolor test[0m [31;40mcolor test[0m
green [32mcolor test[0m [32;40mcolor test[0m
yellow [33mcolor test[0m [33;40mcolor test[0m
blue [34mcolor test[0m [34;40mcolor test[0m
magenta [35mcolor test[0m [35;40mcolor test[0m
cyan [36mcolor test[0m [36;40mcolor test[0m
white [37mcolor test[0m [37;40mcolor test[0m
and now for a test of attributes:
Color Bold Faint
---------------------------------------------------------
black [1;30mcolor test[0m [2;30mcolor test[0m
red [1;31mcolor test[0m [2;31mcolor test[0m
green [1;32mcolor test[0m [2;32mcolor test[0m
yellow [1;33mcolor test[0m [2;33mcolor test[0m
blue [1;34mcolor test[0m [2;34mcolor test[0m
magenta [1;35mcolor test[0m [2;35mcolor test[0m
cyan [1;36mcolor test[0m [2;36mcolor test[0m
white [1;37mcolor test[0m [2;37mcolor test[0m
* Why so much green and violet in the toolkit scripts?
As DTrace can examine the entire software stack, it is conceivable that
your script could print events from many different layers each with their
own color. Color scripts in the DTraceToolkit generally start by tracing
two layers, with extra layers added by the end user as needed (you). The
general plan is:
Software Layer Example Provider Color
-------------------------------------------------------
Dynamic Language perl violet
User Library pid:libperl blue
OS Library pid:libc cyan
System Calls syscall green
Kernel and Drivers fbt red
How these colors will look will depend on your terminal software. Useful
variations can be made, for example using red/bold for kernel abstraction
providers (io, vminfo, ...); and red/faint for raw kernel tracing (fbt).
The color examples in this toolkit usually trace the syscall and dynamic
language layers, hense the green and violet.
* I don't like the choosen terminal colors / your colors suck
It should be easy to customize them by tweaking the script. I've tried
to use the following convention for declaring colors in D scripts:
dtrace:::BEGIN
{
color_shell = "\033[2;35m"; /* violet, faint */
color_line = "\033[1;35m"; /* violet, bold */
color_syscall = "\033[2;32m"; /* green, faint */
color_off = "\033[0m"; /* default */
}
That way, printf() statements can print these string variables to turn
on and off colors, as needed. These strings contain an escape sequence to
inform your terminal software to change the output color. Customizations
can be made by tweaking the variables; refer to documentation for your
terminal software to see what numbers will print what colors.
For my terminal (dtterm), the numbers are (from dtterm(5)):
Attributes
1 bold
2 faint
Forground colors
30 black
31 red
32 green
33 yellow
34 blue
35 magenta
36 cyan
37 white
Background colors
40 black
41 red
... etc, as above
* I'd like to use this colored output on a website.
The easiest way would be to change the script to output HTML rather than
escape sequences. eg:
dtrace:::BEGIN
{
color_shell = "<font color=\"#FFAAFF\">"; /* violet, faint */
color_line = "<font color=\"#FF44FF\">"; /* violet, bold */
color_syscall = "<font color=\"#44CC44\">"; /* green, faint */
color_off = "</font>"; /* default */
}
Other tweaks can be made to either print the output in a <pre> tagged block;
or as seperate lines ending in <br> along with changing the font to be
fixed width.
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