• WSEyeCandyUsingANSISequences

Eye Candy using ANSI Sequences

Problem

Plain text is sometimes a little too plain. Many terminal emulator programs support the ANSI escape sequences for marking up text in different ways.

Scripts

Thanks to Eugene Teo. ansi_colors.stp

probe begin {
        printf("a \\ b |");
        for (c = 40; c < 48; c++)
                printf("   %d   ", c);
        printf("\12");
        for (l = 0; l < 71; l++)
                printf("-");
        printf("\12");

        for (r = 30; r < 38; r++)
                for (t = 0; t < 2; t++) {
                        printf("%d    |", r);
                        for (c = 40; c < 48; c++)
                                printf("\033[%d;%d%s %s \033[0;0m",
                                        r, c, !t ? "m" : ";1m", !t ? "Normal" : "Bold  ");
                        printf("\12");
                }
        exit();
}

Output

Lessons

• One may use escape sequences in systemtap strings.
• Avoid their overuse!
• This area is a good candidate for turning into a set of tapset functions.

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