|
From: | Michael Roth |
Subject: | [Qemu-devel] Re: [RFC][PATCH v5 08/21] virtagent: add agent_viewfile qmp/hmp command |
Date: | Mon, 06 Dec 2010 17:20:53 -0600 |
User-agent: | Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 |
On 12/06/2010 04:08 PM, Adam Litke wrote:
On Fri, 2010-12-03 at 12:03 -0600, Michael Roth wrote:Utilize the getfile RPC to provide a means to view text files in the guest. Getfile can handle binary files as well but we don't advertise that here due to the special handling requiring to store it and provide it back to the user (base64 encoding it for instance). Hence the otherwise confusing "viewfile" as opposed to "getfile".What happens to the monitor if you use this to view a binary file?
At the very least we probably get a lot of truncated files from the binary->string conversion via monitor_printf(). Im not sure how the qobject/json layer would deal with things.
Retrieving binary files progmatically using the QMP interface is a valid use case right?
For getfile (the RPC), but not for viewfile (HMP/QMP). It's doable, but we'd *have to* pass this data to the user as base64-encoded data at the QMP level. At the HMP level I think we're good either way, since we could just base64 decode in the print function.
So in the case of QMP we'd be pushing complexity to the user in exchange for not having a seperate plain-text-only interface.
Either way seems reasonable, but I'd been planning on adding a seperate `agent_copyfile <remote_path> <local_path>` command for dealing with binary data, and making viewfile quick and easy for plain text (both for HMP and QMP).
[Prev in Thread] | Current Thread | [Next in Thread] |