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The QMP shell is a great tool for testing QMP stuffs. It is a set of python scripts that can basically send any QMP command to QEMU and receive any asynchronous events of the QMP channel that QEMU sends. First Python must be installed in dom0 to use it. Before doing this, create some space in the rootfs using the instructions here: Create Space on Target. The following set of additional packages must be installed to get Python support:
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$ opkg install libpython2.7-1.0_2.7.9-r1_core2-32.ipk python-core_2.7.9-r1_core2-32.ipk python-lang_2.7.9-r1_core2-32.ipk python-re_2.7.9-r1_core2-32.ipk python-json_2.7.9-r1_core2-32.ipk python-codecs_2.7.9-r1_core2-32.ipk python-math_2.7.9-r1_core2-32.ipk python-crypt_2.7.9-r1_core2-32.ipk python-netclient_2.7.9-r1_core2-32.ipk python-mime_2.7.9-r1_core2-32.ipk python-datetime_2.7.9-r1_core2-32.ipk python-io_2.7.9-r1_core2-32.ipk python-logging_2.7.9-r1_core2-32.ipk python-textutils_2.7.9-r1_core2-32.ipk python-contextlib_2.7.9-r1_core2-32.ipk python-pickle_2.7.9-r1_core2-32.ipk python-stringold_2.7.9-r1_core2-32.ipk python-readline_2.7.9-r1_core2-32.ipk python-pprint_2.7.9-r1_core2-32.ipk |
Next locate the files qmp-shell and qmp.py under the QMP directory in the qemu-1.4.1 tree. These files an be copied together anywhere in the dom0. Once the shell is running, tabbing will auto-complete showing a list of commands. Hitting enter with no commands will show any asynchronous messages that may have arrived.