QMP/qmp

   1 #!/usr/bin/python
   2 #
   3 # QMP command line tool
   4 #
   5 # Copyright IBM, Corp. 2011
   6 #
   7 # Authors:
   8 #  Anthony Liguori <aliguori@us.ibm.com>
   9 #
  10 # This work is licensed under the terms of the GNU GPLv2 or later.
  11 # See the COPYING file in the top-level directory.
  12
  13 import sys, os
  14 from qmp import QEMUMonitorProtocol
  15
  16 def print_response(rsp, prefix=[]):
  17     if type(rsp) == list:
  18         i = 0
  19         for item in rsp:
  20             if prefix == []:
  21                 prefix = ['item']
  22             print_response(item, prefix[:-1] + ['%s[%d]' % (prefix[-1], i)])
  23             i += 1
  24     elif type(rsp) == dict:
  25         for key in rsp.keys():
  26             print_response(rsp[key], prefix + [key])
  27     else:
  28         if len(prefix):
  29             print '%s: %s' % ('.'.join(prefix), rsp)
  30         else:
  31             print '%s' % (rsp)
  32
  33 def main(args):
  34     path = None
  35
  36     # Use QMP_PATH if it's set
  37     if os.environ.has_key('QMP_PATH'):
  38         path = os.environ['QMP_PATH']
  39
  40     while len(args):
  41         arg = args[0]
  42
  43         if arg.startswith('--'):
  44             arg = arg[2:]
  45             if arg.find('=') == -1:
  46                 value = True
  47             else:
  48                 arg, value = arg.split('=', 1)
  49
  50             if arg in ['path']:
  51                 if type(value) == str:
  52                     path = value
  53             elif arg in ['help']:
  54                 os.execlp('man', 'man', 'qmp')
  55             else:
  56                 print 'Unknown argument "%s"' % arg
  57
  58             args = args[1:]
  59         else:
  60             break
  61
  62     if not path:
  63         print "QMP path isn't set, use --path=qmp-monitor-address or set QMP_PATH"
  64         return 1
  65
  66     if len(args):
  67         command, args = args[0], args[1:]
  68     else:
  69         print 'No command found'
  70         print 'Usage: "qmp [--path=qmp-monitor-address] qmp-cmd arguments"'
  71         return 1
  72
  73     if command in ['help']:
  74         os.execlp('man', 'man', 'qmp')
  75
  76     srv = QEMUMonitorProtocol(path)
  77     srv.connect()
  78
  79     def do_command(srv, cmd, **kwds):
  80         rsp = srv.cmd(cmd, kwds)
  81         if rsp.has_key('error'):
  82             raise Exception(rsp['error']['desc'])
  83         return rsp['return']
  84
  85     commands = map(lambda x: x['name'], do_command(srv, 'query-commands'))
  86
  87     srv.close()
  88
  89     if command not in commands:
  90         fullcmd = 'qmp-%s' % command
  91         try:
  92             os.environ['QMP_PATH'] = path
  93             os.execvp(fullcmd, [fullcmd] + args)
  94         except OSError, (errno, msg):
  95             if errno == 2:
  96                 print 'Command "%s" not found.' % (fullcmd)
  97                 return 1
  98             raise
  99         return 0
 100
 101     srv = QEMUMonitorProtocol(path)
 102     srv.connect()
 103
 104     arguments = {}
 105     for arg in args:
 106         if not arg.startswith('--'):
 107             print 'Unknown argument "%s"' % arg
 108             return 1
 109
 110         arg = arg[2:]
 111         if arg.find('=') == -1:
 112             value = True
 113         else:
 114             arg, value = arg.split('=', 1)
 115
 116         if arg in ['help']:
 117             os.execlp('man', 'man', 'qmp-%s' % command)
 118             return 1
 119
 120         arguments[arg] = value
 121
 122     rsp = do_command(srv, command, **arguments)
 123     print_response(rsp)
 124
 125 if __name__ == '__main__':
 126     sys.exit(main(sys.argv[1:]))