On 6/9/26 3:40 PM, Robert Elz wrote:
| $ PS4='+\[$\]-' | $ set -x | $ echo hello | +$- echo hello | helloIf that's what you're trying to achieve, then PS4='+\$-' will do it, and what's more, work the same way in PSn (for any n), and whether or not line editing is enabled.
Not quite, since \$ is a valid prompt expansion escape sequence, but you can make it work.
As I understand the bash rules, between the \[ and \] in prompts there are only supposed to be data which affects the display mode of the terminal (change colour, bold, blinking, ...) and do not cause any actual visible output. If you have a '$' there (alone) then that breaks the rules, and I think anything is reasonable as a result.
This is true, even if the documentation is not quite explicit that these
sequences are not useful in any other context.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU [email protected] http://tiswww.cwru.edu/~chet/
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