Date: Sun, 18 Jan 2015 18:51:59 +0100 From: Felix Janda <felix.janda@...teo.de> To: musl@...ts.openwall.com Subject: getopt_long_only and slightly unambiguous options Hello, since widl from wine uses the combination, get_opt_long_only seems to be supposed to be able to differentiate between a short option "-h" and a long option "--help". Together with the possibility of option abbreviations, the behavior we are trying to copy is: -h -> -h --help -> --help -help -> --help -he -> --help --h -> --help However musl maps all of them to --help. The man page is ambiguous about this aspect and I'm not sure if the BSDs have the same behavior here. (However I would suspect that the breakage in widl, when the --help option was added in 2012, would have been noticed.) As always, it is hard to measure how many applications (and scripts written against these applications) might depend on this behavior. Since getopt_long_only is discouraged maybe these are actually quite few, though. All in all I think that this a bug in musl which should be fixed. For the implementation, is it maybe enough in __getopt_long_core to pass options starting with '-' and of exactly two characters directly to getopt? Thanks, Felix
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