Re: [libvirt] Regarding guest-file-write

On Tue, Jun 24, 2014 at 06:20:16PM +0530, Puneet Bakshi wrote: > Hi, > > >From host, I wrote 26 alphabets in guest file (/tmp/testqga) using > guest-file-write guest agent command (logs pasted below). I faced 2 issues > when doing that. > > 1a. It could wrote only 18bytes! Why could it not write all 26 characters? > Are we supposed to track how much data is written and need to resend the > remaining one? > > 1b. What is the limit of data, I can send in one guest-file-write command? > > 2. In the guest, file data seems to be different. Am I doing something > wrong here? Yes, the command does not take raw data, it takes base-64 encoded data. So those 26 characters you specified were base64 decoded which gives you 18 bytes of raw data. The clue is in the variable name 'buf-b64' - a shorthand for base64: > [root@sdsr720-14 ~]# virsh qemu-agent-command vm_04 '{" > execute":"guest-file-write", > "arguments":{"handle":1000,"buf-b64":"abcdefghijklmnopqrstuvwxyz"}}' > > {"return":{"count":18,"eof":false}} Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|