On Wed, Aug 23, 2017 at 3:57 PM, Eric Blake <ebl...@redhat.com> wrote:
> > Not just deprecated, but inherently ambiguous. There are situations > where you CANNOT tell whether the user meant -a to mean the binary > operator or a string being tested against, because POSIX (intentionally) > does not specify enough precedence rules in how to parse > 4 arguments. > > -- > Eric Blake, Principal Software Engineer > Red Hat, Inc. +1-919-301-3266 > Virtualization: qemu.org | libvirt.org > > What would you expect [ ! -a foo ] to do? It's always true, because it treats -a as the logical AND there. And that's with 3 arguments, which is defined but unexpected behavior
