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8869adf1e8
This commit changes guestfs_launch so that it both launches the appliance and waits until it is ready (ie. the daemon communicates back to us). Since we removed the pretence that we could implement a low-level asynchronous API, the need to call launch() followed by wait_ready() has looked a bit silly. Now guestfs_wait_ready() is basically a no-op. It is left in the API for backwards compatibility. Any calls to guestfs_wait_ready() can be removed from client code.
This is a test tool, not a comprehensive test, but a "does it basically function" test, which can be packaged and given to end users. It also collects and prints a lot of internal debug information, which is useful in bug reports to track down appliance / qemu boot problems. For more information, please read the man page libguestfs-test-tool(1).