Diff for "BashFAQ/053"

Differences between revisions 2 and 4 (spanning 2 versions)

I have a fancy prompt with colors, and now bash doesn't seem to know how wide my terminal is. Lines wrap around incorrectly.

You must put \[ and \] around any non-printing escape sequences in your prompt. Thus:

BLUE=$(tput setaf 4)
PURPLE=$(tput setaf 5)
BLACK=$(tput setaf 0)
PS1='\[$BLUE\]\h:\[$PURPLE\]\w\[$BLACK\]\$ '

Without the \[ \], bash will think the bytes which constitute the escape sequences for the color codes will actually take up space on the screen, so bash won't be able to know where the cursor actually is.

Refer to the Wikipedia article for ANSI escape codes.

-  ⇤ ← Revision 2 as of 2007-05-10 01:20:16 → 
  Size: 701
  Editor: ool-4577d016
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+   ← Revision 4 as of 2008-11-22 21:54:50 → ⇥
  Size: 701
  Editor: GreyCat
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-Refer to the Wikipedia article for [http://en.wikipedia.org/wiki/ANSI_escape_code ANSI escape codes].
+Refer to the Wikipedia article for [[http://en.wikipedia.org/wiki/ANSI_escape_code|ANSI escape codes]].