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





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 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


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