Re: [libvirt] [PATCH] schematestutils.sh: improve shell portability: avoid "echo -e"

On 04/14/2010 05:28 AM, Jim Meyering wrote: ACK. How'd you find it? I know we've talked about adding a maint.mk check to help automate some of this (was it over on the bug-grep list?), but I still haven't thought of a good regexp that doesn't suffer from too many false positives (in particular, distinguishing between \ as arguments to echo vs. \ as line continuation can be hard) while still catching the worst offenders. Right now, about the best regex I can think of is: 'echo .?[$-]' which will filter out: echo -n oops echo -e oops echo "$oops" where the first two are blatantly wrong, and the third might be a false positive if you can audit $oops for safety. It would also have a FP on: echo a-b although that is less likely, and it totally misses echo 'a\\b', but you can only do so much. -- Eric Blake eblake(a)redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org