On 10/21/2015 07:04 AM, Leslie S Satenstein wrote: > Hi Eric > I like your findings. Can you see any wrong reason why the parser should not > first scan for -- arguments?
That's what the parser already does. The question is whether the scan should be one-pass or two-pass. > I would like to see something like " ls -l * --help " tell me > what "ls -l" is about? Regards No, be careful. I specifically note that I _like_ the behavior of options eating their arguments. 'ls -l * --help' will NOT always output help, if the last file in the expansion of '*' resembles an option that requires an argument. I'm only requesting whether 'ls -l * --help --help' is a guaranteed way to get help. For a more concrete example, chmod --reference --help . must NOT print help, but instead must attempt to change the mode of '.' to match the mode of the file './--help'. On the other hand, chmod --reference --help --help SHOULD print help, even if the file './--help' does not exist. (And in fact, things work correctly here, because for chmod --reference, we do not exit early). The trick is the notion that options MUST eat their arguments before scanning for --help, but fixing things so that no option can exit early before --help has been scanned for across all possible options. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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