[Toybox] Subject: [PATCH] Add getopt(1).

[enh]

On a related note... The BSDs (including Mac) all have a getopt(1) but it's
a trivial one, like getopts. util-linux and busybox both have this "full"
getopt.

On Fri, Nov 22, 2019, 08:17 enh <enh at google.com> wrote:

> On Fri, Nov 22, 2019 at 5:02 AM Rob Landley <rob at landley.net> wrote:
> >
> > On 11/22/19 6:56 AM, Rob Landley wrote:
> > > On 11/21/19 4:13 PM, enh via Toybox wrote:
> > >> Includes new tests.
> > >> ---
> > >>  lib/portability.h     |   3 ++
> > >
> > > Applied, by why add this #include to portability.h when it's not in an
> #ifdef?
> > > The main #includes are in toys.h.
> >
> > Also, would someone please explain why posix-2008 has "getopts" with an
> s:
> >
> >
> https://pubs.opengroup.org/onlinepubs/9699919799.2008edition/utilities/getopts.html
> >
> > But the bash builtin and util-linux command are both "getopt" without an
> s? (And
> > gratuitously stomping man 3 getopt with man 1 getopt?)
>
> are you sure? my bash has getopts built in and an external getopt.
>
> ~$ type getopts
> getopts is a shell builtin
> ~$ type getopt
> getopt is /usr/bin/getopt
> ~$
>
> the same is true of mksh too. haven't looked at any other shells.
>
> > I notice this new implementation doesn't link to posix as its spec in
> the header
> > block, I'm guessing they're different commands?
>
> mostly, yes. the comment in the getopt.c source about "legacy" mode?
> POSIX getopts is a subset even of that. legacy mode is more
> complicated because you have to deal with cases like "mostly using new
> options, but missing -o or an early OPTSTR, so steal the first app
> argument".
>
> on the bright side, getopts is probably two lines of C in the shell
> --- basically just a call to non-long getopt(3), although getopts is
> also subject to a few extra shell variables that don't mean anything
> to getopt(1). that might be the reason why even bash's getopts doesn't
> have all the extra stuff that's in a current getopt(1) added to it?
>
> (there are actually orders of magnitude more references to getopts
> than getopt in the Android build, but that's covered by bash for the
> time being...)
>
> > Rob
> > _______________________________________________
> > Toybox mailing list
> > Toybox at lists.landley.net
> > http://lists.landley.net/listinfo.cgi/toybox-landley.net
>
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