Re: [Qemu-devel] [PATCH v2] qemu-io: Reinitialize optind to 1 (not 0) before parsing inner command.

[Richard W.M. Jones]

On Mon, Jan 07, 2019 at 06:50:53PM +0100, Max Reitz wrote:
[...]

I don't particularly care how we fix this, but it breaks the nbdkit
tests on FreeBSD so I am keen to fix it one way or another.

> And if optreset not being available for glibc is the only issue, I'd say
> adding it as a weak global variable would work without #ifdefs.

The weak global variable doesn't make the code "#ifdef free".  I tried
a patch like this:

+int optreset __attribute__((weak));

...

 static int command(...)
 {
   ...
   optind = 0;
+  optreset = 1;
  ...
 }

but that still doesn't work on FreeBSD.

You have to set optind=1 apparently.  So if we want to set optreset=1
we still end up with #ifdef __FreeBSD__.  The final patch will
end up looking something like:

 static int command(...)
 {
   ...
+#ifdef __FreeBSD__
+  optind = 1;
+  optreset = 1;
+#else
   optind = 0;
+#endif
  ...
 }

If you want me to submit a formal patch like this let me know.

Rich.

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