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Full Discussion: Escape characters in a variable
Top Forums Shell Programming and Scripting Escape characters in a variable Post 303033141 by RudiC on Saturday 30th of March 2019 05:27:36 PM
Old 03-30-2019
Please make it a habit to post your system's info in every single new thread, as you did thankworthily in your very first post in here: "Debian 9 64x - LXDE".


As for your problem: the bash builtin echo needs the -e option. man bash:
Quote:
If the -e option is given, interpretation of the following backslash-escaped characters is enabled.
Same holds true for the external /bin/echo comand on linux systems. It does not necessarily on other systems.



Code:
echo "$red_start This text should be red $color_end"
\e[91m This text should be red \e[0m
echo -e "$red_start This text should be red $color_end"
 This text should be red

This User Gave Thanks to RudiC For This Post:
int3g3r
 

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LEARN ABOUT REDHAT

glcolormask

GLCOLORMASK(3G) 														   GLCOLORMASK(3G)

NAME

       glColorMask - enable and disable writing of frame buffer color components

C SPECIFICATION

       void glColorMask( GLboolean red,
			 GLboolean green,
			 GLboolean blue,
			 GLboolean alpha )

PARAMETERS

       red, green, blue, alpha
			     Specify  whether  red, green, blue, and alpha can or cannot be written into the frame buffer.  The initial values are
			     all GL_TRUE, indicating that the color components can be written.

DESCRIPTION

       glColorMask specifies whether the individual color components in the frame buffer can or cannot be written.  If red is GL_FALSE, for  exam-
       ple, no change is made to the red component of any pixel in any of the color buffers, regardless of the drawing operation attempted.

       Changes to individual bits of components cannot be controlled.  Rather, changes are either enabled or disabled for entire color components.

ERRORS

       GL_INVALID_OPERATION is generated if glColorMask is executed between the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS

       glGet with argument GL_COLOR_WRITEMASK
       glGet with argument GL_RGBA_MODE

SEE ALSO

       glClear(3G), glColor(3G), glColorPointer(3G), glDepthMask(3G), glIndex(3G), glIndexPointer(3G), glIndexMask(3G), glStencilMask(3G)

																   GLCOLORMASK(3G)
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