On 20/02/2017 16:42, Stefan Raspl wrote:
> +def get_gname_from_pid(pid):
> + """Returns the guest name for a QEMU process pid.
> +
> + Extracts the guest name from the QEMU comma line by processing the '-name'
> + option. Will also handle names specified out of sequence.
> +
> + """
> + name = ''
> + try:
> + line = open('/proc/{}/cmdline'.format(pid), 'rb').read().split('\0')
> + parms = line[line.index('-name') + 1].split(',')
> + while '' in parms:
> + # commas are escaped (i.e. ',,'), hence e.g. 'foo,bar' results in
> + # ['foo', '', 'bar'], which we revert here
> + idx = parms.index('')
> + parms[idx - 1] += ',' + parms[idx + 1]
> + del parms[idx:idx+2]
> + # the '-name' switch allows for two ways to specify the guest name,
> + # where the plain name overrides the name specified via 'guest='
> + for arg in parms:
> + if '=' not in arg:
> + name = arg
> + break
> + if arg[:6] == 'guest=':
> + name = arg[6:]
> + except (ValueError, IOError, IndexError):
> + pass
> +
> + return name
> +
> +
That's as hideous as it is useful! :)
Paolo
