scripts/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 from __future__ import print_function
  14 from __future__ import absolute_import
  15 import sys, os
  16 from .qmp import QEMUMonitorProtocol
  17
  18 def print_response(rsp, prefix=[]):
  19     if type(rsp) == list:
  20         i = 0
  21         for item in rsp:
  22             if prefix == []:
  23                 prefix = ['item']
  24             print_response(item, prefix[:-1] + ['%s[%d]' % (prefix[-1], i)])
  25             i += 1
  26     elif type(rsp) == dict:
  27         for key in rsp.keys():
  28             print_response(rsp[key], prefix + [key])
  29     else:
  30         if len(prefix):
  31             print('%s: %s' % ('.'.join(prefix), rsp))
  32         else:
  33             print('%s' % (rsp))
  34
  35 def main(args):
  36     path = None
  37
  38     # Use QMP_PATH if it's set
  39     if 'QMP_PATH' in os.environ:
  40         path = os.environ['QMP_PATH']
  41
  42     while len(args):
  43         arg = args[0]
  44
  45         if arg.startswith('--'):
  46             arg = arg[2:]
  47             if arg.find('=') == -1:
  48                 value = True
  49             else:
  50                 arg, value = arg.split('=', 1)
  51
  52             if arg in ['path']:
  53                 if type(value) == str:
  54                     path = value
  55             elif arg in ['help']:
  56                 os.execlp('man', 'man', 'qmp')
  57             else:
  58                 print('Unknown argument "%s"' % arg)
  59
  60             args = args[1:]
  61         else:
  62             break
  63
  64     if not path:
  65         print("QMP path isn't set, use --path=qmp-monitor-address or set QMP_PATH")
  66         return 1
  67
  68     if len(args):
  69         command, args = args[0], args[1:]
  70     else:
  71         print('No command found')
  72         print('Usage: "qmp [--path=qmp-monitor-address] qmp-cmd arguments"')
  73         return 1
  74
  75     if command in ['help']:
  76         os.execlp('man', 'man', 'qmp')
  77
  78     srv = QEMUMonitorProtocol(path)
  79     srv.connect()
  80
  81     def do_command(srv, cmd, **kwds):
  82         rsp = srv.cmd(cmd, kwds)
  83         if 'error' in rsp:
  84             raise Exception(rsp['error']['desc'])
  85         return rsp['return']
  86
  87     commands = map(lambda x: x['name'], do_command(srv, 'query-commands'))
  88
  89     srv.close()
  90
  91     if command not in commands:
  92         fullcmd = 'qmp-%s' % command
  93         try:
  94             os.environ['QMP_PATH'] = path
  95             os.execvp(fullcmd, [fullcmd] + args)
  96         except OSError as exc:
  97             if exc.errno == 2:
  98                 print('Command "%s" not found.' % (fullcmd))
  99                 return 1
 100             raise
 101         return 0
 102
 103     srv = QEMUMonitorProtocol(path)
 104     srv.connect()
 105
 106     arguments = {}
 107     for arg in args:
 108         if not arg.startswith('--'):
 109             print('Unknown argument "%s"' % arg)
 110             return 1
 111
 112         arg = arg[2:]
 113         if arg.find('=') == -1:
 114             value = True
 115         else:
 116             arg, value = arg.split('=', 1)
 117
 118         if arg in ['help']:
 119             os.execlp('man', 'man', 'qmp-%s' % command)
 120             return 1
 121
 122         arguments[arg] = value
 123
 124     rsp = do_command(srv, command, **arguments)
 125     print_response(rsp)
 126
 127 if __name__ == '__main__':
 128     sys.exit(main(sys.argv[1:]))