---- Francois Visconte <[EMAIL PROTECTED]> wrote: > Hello, > > I'm currently developing an OS deployment tool similar to G4U (ghost for > unix). > This is a very basic tool > - boot an initrd > - configure network > - ssh deployment-server "cat image.dd" > /dev/sda > - reboot > > > I'm using qemu to test my initrd and deployment tool and i would like > replace my raw image format with qcow images (size/compression and crypto) > > - ssh deployment-server "cat image.qcow" | qemu-img - -O raw /dev/sda > > The problem is qemu-img can't read from stdin, so i tried : > > - mkfifo deploy-in.fifo > - qemu-img convert deploy-in.fifo -O raw /dev/sda > - ssh deployment-server "cat image.qcow" > deploy-in.fifo > qemu-img: Could not open 'deploy-in.fifo'
I have not looked at the code in qemu-img (and the associated routines). It appears that qemu-img is probably looking for a file handle and not a named pipe. Either that, or you need to shove the ssh command in the background before the qemu-img command so qemu-img has a chance to start processing the data. It's not clear whether or not qemu-img is seeing an "empty file" because there's no data on the pipe, or it can't read from the pipe. Ben
