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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