Re: failed grep should cause subshell to exit

[David Lehmann]

Andreas,

I expected the '!' to reverse the exit code, such that if the grep return 0
(success), the expression would return 1 (failure); if the grep returned
non-zero (failure), the expression would return 0 (success).   i.e. I
expected the '!' to behave like it does in C.

-David





On Mon, Aug 19, 2013 at 3:43 AM, Andreas Schwab <schwab@suse.de> wrote:

> David Lehmann <david.lehmann@alumni.rutgers.edu> writes:
>
> > ! grep hello x****
>
> ! causes the shell to ignore -e.
>
> Andreas.
>
> --
> Andreas Schwab, SUSE Labs, schwab@suse.de
> GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
> "And now for something completely different."
>