[libvirt] [Qemu-devel] [RFC PATCH 1/4] qemu-options: Add -filefd command line option

[Corey Bryant]

On 05/21/2012 05:40 PM, Eric Blake wrote:
> On 05/21/2012 02:19 PM, Corey Bryant wrote:
>> This patch provides support for the -filefd command line option.
>> This option will allow passing of a filename and its corresponding
>> file descriptor to QEMU at exec time.
>>
>> Signed-off-by: Corey Bryant<coreyb at linux.vnet.ibm.com>
>
>> +DEF("filefd", HAS_ARG, QEMU_OPTION_filefd,
>> +    "-filefd file=<filename>,fd=<fd>\n"
>
> I take it that if filename contains ',', then we have to escape it on
> the command line?  Is it worth passing fd first and file second by
> default, as a possible way to avoid the need for escaping, or does the
> option parser not care about ordering?
>

That's a good question.  The options can be ordered either way so I 
don't think we'll force fd to be specified first.  I imagine this should 
behave no differently than "-drive file=xyz,if=none,...".  I ran a quick 
test using -drive with a filename that had a comma, and (escaped or not) 
it failed on the option parsing.  So it looks like if you have a path 
with a comma you're not going to have any luck.

-- 
Regards,
Corey