On 02/23/2016 12:21 PM, Harald van Dijk wrote: > On 23/02/2016 19:58, Eric Blake wrote: >> On 02/23/2016 11:44 AM, Harald van Dijk wrote: >> >>> This matches bash's behaviour, aside from bash requiring -- to prevent >>> detection of invalid flags to the alias command: >>> >>> bash-4.3$ alias -- -=true >> >> Then dash DOES have a bug: > > Indeed, I wasn't trying to suggest otherwise, my apologies if it came > across that way. It's not limited to the alias command though, I spotted > at least the exit and getopts commands having the same problem, and it > should probably be fixed for all of them at once. getopts - definitely needs a fix exit - fuzzy. exit is a special built-in (unlike getopts); and XCU 2.14 states: "Some of the special built-ins are described as conforming to XBD Utility Syntax Guidelines. For those that are not, the requirement in Utility Description Defaults that "--" be recognized as a first argument to be discarded does not apply and a conforming application shall not use that argument. " Conforming apps cannot expect 'exit -1' to work, and therefore, cannot also expect 'exit -- -1' to work, since the only standards-defined values for an argument to exit is a non-negative decimal integer less than 256. Of course, if you want to fix it along with all the others, that's fine; I'm just pointing out that 'exit' isn't broken as-is. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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