On 11/20/19 9:27 PM, Clark Wang wrote:
It's quite common for people to press CTRL-C to discard the current command
line. This is harmless actually for most times except when people include
$? in $PS1. I also show $? in red color when it's not 0 so it's more
noticeable. So is it OK to not change $? when people are pressing CTRL-C to
discard the input?
This behavior dates from at least 2009 and was added at user request so
they could tell exactly that: whether or not entering the last command had
been interrupted by a signal.
(Before that, dating back to bash-4.0, it set $? to 128 for exactly the
same reason, but that's clearly wrong. Before that, it set $? to 1 for as
far back as I have bash versions built, but that doesn't tell you anything
about signal receipt.)
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/
