Re: CVS commit: src/tests/util/sh

[David Holland <dholland-sourcechanges%netbsd.org@localhost>]

On Sun, Jun 06, 2010 at 07:11:05PM +0000, David Holland wrote:
 > On Sun, Jun 06, 2010 at 08:08:57AM -0400, Christos Zoulas wrote:
 >  > | If it's more important that the nightly test runs come up clean than
 >  > | that it actually check for correct behavior so sh gets fixed, the test
 >  > | script should at least document what the correct behavior is. I have
 >  > | done this much, although I'm inclined to think the changes should be
 >  > | reverted entirely.
 >  > 
 >  > Please show me a shell implementation where those tests work, and then
 >  > I will accept that reverting them is TRT. I personally cannot find one.
 >  > Also all the tests now behave consistently in ksh, bash, and ash so I
 >  > am inclined to believe that they are correct.
 > 
 > The last time I tried, the behavior of sh, ksh, and bash diverged
 > substantially on some of them. Others, yes, it's posix on one side and
 > all extant implementations on the other... this is why I was trying to
 > secure a consensus, but that hasn't happened; it's too fiddly and
 > consequently ~nobody cares enough to wade into the gory details.

Ok, right now ksh diverges from sh on 32 of 75 cases, including
several of the ones you changed. bash diverges on 3.

Anyway, the test script now at least documents what the deal is, so
I'm ok with leaving it until we can reach some conclusions on the
proper behavior.

-- 
David A. Holland
dholland%netbsd.org@localhost