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Message-ID: <CAK1hOcOd0wAOEM7Weqp+zFtYtOFwQpAVidzvTOooSkZ0s7b8mw@mail.gmail.com>
Date: Mon, 28 Aug 2017 17:17:06 +0200
From: Denys Vlasenko <vda.linux@...glemail.com>
To: musl <musl@...ts.openwall.com>, Rich Felker <dalias@...c.org>,
Waldemar Brodkorb <wbx@...nadk.org>
Subject: Re: getopt() not exposing __optpos - shell needs it
On Mon, Aug 28, 2017 at 12:18 PM, Denys Vlasenko
<vda.linux@...glemail.com> wrote:
> glibc/uclibc need more extensive changes, since they use a pointer to store
> the position. This is a test in busybox tree which fails miserably
> because of that:
>
> https://git.busybox.net/busybox/tree/shell/hush_test/hush-getopts/getopt_test_libc_bug.tests
> # This test can fail with libc with buggy getopt() implementation.
> # If getopt() wants to parse multi-option args (-abc),
> # it needs to remember a position within current arg.
> #
> # If this position is kept as a POINTER, not an offset,
> # and if argv[] ADDRESSES (not contents!) change, it blows up.
uclibc would need something like this patch (not tested at all):
View attachment "z.diff" of type "text/plain" (12275 bytes)
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