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Re: Problem with if [ -d in bash 4.3.30
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From: |
Stephane Chazelas |
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Subject: |
Re: Problem with if [ -d in bash 4.3.30 |
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Date: |
Tue, 9 Dec 2014 14:47:15 +0000 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
2014-12-09 07:14:16 -0700, Eric Blake:
[...]
> No, you get the correct behavior. Newer bash fixed the parser bug to
> comply with POSIX.
>
> For comparison, try:
>
> $ echo . ${VAR:=""} .
> . .
> $ echo . "${VAR:=""}" .
> . .
[...]
It's a bit confusing that ${VAR:-""} should be treated
differently from ${VAR:=""}. Was there a rationale for changing
the behaviour other than strict POSIX conformance? AFAICT, ksh
and mksh behave differently (from bash and from each other), so
I can't say the change helps much with portability here.
--
Stephane