Re: bin/50827 (sh -c ': "${x=$((1))}"' gives bogus syntax error)

[christos%zoulas.com@localhost (Christos Zoulas)]

The following reply was made to PR bin/50827; it has been noted by GNATS.

From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%NetBSD.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, 
	rhansen%rhansen.org@localhost
Cc: 
Subject: Re: bin/50827 (sh -c ': "${x=$((1))}"' gives bogus syntax error)
Date: Fri, 19 Feb 2016 09:57:32 -0500

 On Feb 19,  2:50pm, kre%munnari.OZ.AU@localhost (Robert Elz) wrote:
 -- Subject: Re: bin/50827 (sh -c ': "${x=$((1))}"' gives bogus syntax error)
 
 | The following reply was made to PR bin/50827; it has been noted by GNATS.
 | 
 | From: Robert Elz <kre%munnari.OZ.AU@localhost>
 | To: gnats-bugs%NetBSD.org@localhost
 | Cc: 
 | Subject: Re: bin/50827 (sh -c ': "${x=$((1))}"' gives bogus syntax error)
 | Date: Fri, 19 Feb 2016 21:49:24 +0700
 | 
 |      Date:        Fri, 19 Feb 2016 14:02:00 +0000 (UTC)
 |      From:        wiz%NetBSD.org@localhost
 |      Message-ID:  <20160219140200.3F64A7ACAF%mollari.NetBSD.org@localhost>
 |  
 |    | christos committed a fix, does it work for you?
 |  
 |  I know this was not directed at me, so don't take this as an answer,
 |  but it still fails on even more bizarre usages...
 |  
 |  	./sh -c 'echo ${x:-$(( ${y:-"$((4))"} ))}'
 |  	sh: Syntax error: Unterminated quoted string
 |  
 |  this fails if the quotes are inside the outer $(( )), but not inside the
 |  inner $(( )) .. doesn't matter if the entire ${y...} is quoted or just
 |  as shown, it fails the same way.   But works if it is just the "4" quoted.
 |  
 |  And to go even further into the absurd ...
 |  
 |  	./sh -c 'echo ${x:-"$(( "${y:-$(( ${z:-$(( 9 ))} ))}" ))"}'
 |  	sh: Syntax error: Missing '))'
 |  
 |  sh is better now than it was, but this stuff ought to be fixed as well.
 |  Without quoting, that works (believe it or not.)
 |  
 |  I am looking into it, but maybe the PR can remain open for now.
 
 If you are looking into quoting, please look at: bin/43469. Also it might
 be worthwhile to compare ours with FreeBSD's sh and switch to their code
 if it is better.
 
 christos