On 09/01/2015 18:39, Eric Blake wrote:
On 01/09/2015 10:17 AM, Harald van Dijk wrote:A short test script: f() { echo inside f, VAR is $VAR sh -c 'echo inside sh called from f, VAR is $VAR' } VAR=value fThis behavior is tricky. Here's the latest POSIX wording: http://austingroupbugs.net/view.php?id=654#c1559
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So the existing dash behavior is compliant, even if different from bash.
Thank you for the reference! I wasn't aware that the wording has since changed.
I have no opinion on whether to take the patch in order to behave more like bash, or whether to tell script-writers to fix their script to avoid unspecified behavior because dash is already compliant in providing a different behavior than bash.
Well, perhaps it was already compliant, perhaps it became compliant by changing the standard, but either way, it is compliant now. :)
If either behaviour is allowed, then I believe dash aims to avoid breaking changes. Existing scripts written for dash could conceivably rely on the current behaviour, so without any real benefit, my patch would be a bad idea. bash compatibility is usually not considered a big benefit for dash, POSIX compatibility is.
Because of that, I withdraw my patch. Cheers, Harald van Dijk -- To unsubscribe from this list: send the line "unsubscribe dash" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
