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bad interaction with custom prompt and beginning-of-line

From: Robert Anderson
Subject: bad interaction with custom prompt and beginning-of-line
Date: Fri, 4 May 2007 15:57:38 -0700

I use bash and have a custom prompt that includes some coloring (which includes non-printing characters, of course).

When in an xterm, I can always use ctrl-a (beginning-of-line) to return to the beginning of the line, and it always goes to the correct cursor position.

When I start screen, if I have text that wraps onto more than one line, and I use ctrl-a, it backs up too far, into the middle of the prompt.  If cursor forward, the prompt is overwritten by the text as if it was shifted left a few characters.

Is there any way I can work around this, other than removing the non-printing characters from my prompt?

Here's an example prompt you can try:

PS1="\[\e[0;42m\u\e[0;49m\] "

which is just your username in green followed by a space.  Try typing a line that wraps, and then do beginning-of-line.

I am using screen 4.0.2.

Thanks for any help,

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