On Fri, Sep 6, 2019 at 2:40 PM JohnS <openbsd-misc-nos...@riseup.net> wrote:
> Why next construction doesn't work?
>
> read x; while [ "$x" != [abc] ]; do echo "Not a, b or c"; break; done
People have been focusing on the syntax of arguments for test (the
left bracket operation), but there's no 'next' here.
You are reading x just once and then going into a loop. That's almost
certainly not what you want to do.
You might want to be doing something like this:
while read x; ! echo $x | egrep -q '[abc]'; do echo 'Not a, b or c'; done
But, given how non-functional your code example was, and how
non-descriptive your surrounding text was, it's kind of hard to
tell...
That said, good luck,
--
Raul
