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+#!/usr/bin/python
+
+# QEMU Guest Agent Client
+#
+# Copyright (C) 2012 Ryota Ozaki <ozaki.ryota@gmail.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2. See
+# the COPYING file in the top-level directory.
+#
+# Usage:
+#
+# Start QEMU with:
+#
+# # qemu [...] -chardev socket,path=/tmp/qga.sock,server,nowait,id=qga0 \
+# -device virtio-serial -device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0
+#
+# Run the script:
+#
+# $ qemu-ga-client --address=/tmp/qga.sock <command> [args...]
+#
+# or
+#
+# $ export QGA_CLIENT_ADDRESS=/tmp/qga.sock
+# $ qemu-ga-client <command> [args...]
+#
+# For example:
+#
+# $ qemu-ga-client cat /etc/resolv.conf
+# # Generated by NetworkManager
+# nameserver 10.0.2.3
+# $ qemu-ga-client fsfreeze status
+# thawed
+# $ qemu-ga-client fsfreeze freeze
+# 2 filesystems frozen
+#
+# See also: http://wiki.qemu.org/Features/QAPI/GuestAgent
+#
+
+import base64
+import random
+
+import qmp
+
+
+class QemuGuestAgent(qmp.QEMUMonitorProtocol):
+ def __getattr__(self, name):
+ def wrapper(**kwds):
+ return self.command('guest-' + name.replace('_', '-'), **kwds)
+ return wrapper
+
+
+class QemuGuestAgentClient:
+ error = QemuGuestAgent.error
+
+ def __init__(self, address):
+ self.qga = QemuGuestAgent(address)
+ self.qga.connect(negotiate=False)
+
+ def sync(self, timeout=3):
+ # Avoid being blocked forever
+ if not self.ping(timeout):
+ raise EnvironmentError('Agent seems not alive')
+ uid = random.randint(0, (1 << 32) - 1)
+ while True:
+ ret = self.qga.sync(id=uid)
+ if isinstance(ret, int) and int(ret) == uid:
+ break
+
+ def __file_read_all(self, handle):
+ eof = False
+ data = ''
+ while not eof:
+ ret = self.qga.file_read(handle=handle, count=1024)
+ _data = base64.b64decode(ret['buf-b64'])
+ data += _data
+ eof = ret['eof']
+ return data
+
+ def read(self, path):
+ handle = self.qga.file_open(path=path)
+ try:
+ data = self.__file_read_all(handle)
+ finally:
+ self.qga.file_close(handle=handle)
+ return data
+
+ def info(self):
+ info = self.qga.info()
+
+ msgs = []
+ msgs.append('version: ' + info['version'])
+ msgs.append('supported_commands:')
+ enabled = [c['name'] for c in info['supported_commands'] if c['enabled']]
+ msgs.append('\tenabled: ' + ', '.join(enabled))
+ disabled = [c['name'] for c in info['supported_commands'] if not c['enabled']]
+ msgs.append('\tdisabled: ' + ', '.join(disabled))
+
+ return '\n'.join(msgs)
+
+ def __gen_ipv4_netmask(self, prefixlen):
+ mask = int('1' * prefixlen + '0' * (32 - prefixlen), 2)
+ return '.'.join([str(mask >> 24),
+ str((mask >> 16) & 0xff),
+ str((mask >> 8) & 0xff),
+ str(mask & 0xff)])
+
+ def ifconfig(self):
+ nifs = self.qga.network_get_interfaces()
+
+ msgs = []
+ for nif in nifs:
+ msgs.append(nif['name'] + ':')
+ if 'ip-addresses' in nif:
+ for ipaddr in nif['ip-addresses']:
+ if ipaddr['ip-address-type'] == 'ipv4':
+ addr = ipaddr['ip-address']
+ mask = self.__gen_ipv4_netmask(int(ipaddr['prefix']))
+ msgs.append("\tinet %s netmask %s" % (addr, mask))
+ elif ipaddr['ip-address-type'] == 'ipv6':
+ addr = ipaddr['ip-address']
+ prefix = ipaddr['prefix']
+ msgs.append("\tinet6 %s prefixlen %s" % (addr, prefix))
+ if nif['hardware-address'] != '00:00:00:00:00:00':
+ msgs.append("\tether " + nif['hardware-address'])
+
+ return '\n'.join(msgs)
+
+ def ping(self, timeout):
+ self.qga.settimeout(timeout)
+ try:
+ self.qga.ping()
+ except self.qga.timeout:
+ return False
+ return True
+
+ def fsfreeze(self, cmd):
+ if cmd not in ['status', 'freeze', 'thaw']:
+ raise StandardError('Invalid command: ' + cmd)
+
+ return getattr(self.qga, 'fsfreeze' + '_' + cmd)()
+
+ def fstrim(self, minimum=0):
+ return getattr(self.qga, 'fstrim')(minimum=minimum)
+
+ def suspend(self, mode):
+ if mode not in ['disk', 'ram', 'hybrid']:
+ raise StandardError('Invalid mode: ' + mode)
+
+ try:
+ getattr(self.qga, 'suspend' + '_' + mode)()
+ # On error exception will raise
+ except self.qga.timeout:
+ # On success command will timed out
+ return
+
+ def shutdown(self, mode='powerdown'):
+ if mode not in ['powerdown', 'halt', 'reboot']:
+ raise StandardError('Invalid mode: ' + mode)
+
+ try:
+ self.qga.shutdown(mode=mode)
+ except self.qga.timeout:
+ return
+
+
+def _cmd_cat(client, args):
+ if len(args) != 1:
+ print('Invalid argument')
+ print('Usage: cat <file>')
+ sys.exit(1)
+ print(client.read(args[0]))
+
+
+def _cmd_fsfreeze(client, args):
+ usage = 'Usage: fsfreeze status|freeze|thaw'
+ if len(args) != 1:
+ print('Invalid argument')
+ print(usage)
+ sys.exit(1)
+ if args[0] not in ['status', 'freeze', 'thaw']:
+ print('Invalid command: ' + args[0])
+ print(usage)
+ sys.exit(1)
+ cmd = args[0]
+ ret = client.fsfreeze(cmd)
+ if cmd == 'status':
+ print(ret)
+ elif cmd == 'freeze':
+ print("%d filesystems frozen" % ret)
+ else:
+ print("%d filesystems thawed" % ret)
+
+
+def _cmd_fstrim(client, args):
+ if len(args) == 0:
+ minimum = 0
+ else:
+ minimum = int(args[0])
+ print(client.fstrim(minimum))
+
+
+def _cmd_ifconfig(client, args):
+ print(client.ifconfig())
+
+
+def _cmd_info(client, args):
+ print(client.info())
+
+
+def _cmd_ping(client, args):
+ if len(args) == 0:
+ timeout = 3
+ else:
+ timeout = float(args[0])
+ alive = client.ping(timeout)
+ if not alive:
+ print("Not responded in %s sec" % args[0])
+ sys.exit(1)
+
+
+def _cmd_suspend(client, args):
+ usage = 'Usage: suspend disk|ram|hybrid'
+ if len(args) != 1:
+ print('Less argument')
+ print(usage)
+ sys.exit(1)
+ if args[0] not in ['disk', 'ram', 'hybrid']:
+ print('Invalid command: ' + args[0])
+ print(usage)
+ sys.exit(1)
+ client.suspend(args[0])
+
+
+def _cmd_shutdown(client, args):
+ client.shutdown()
+_cmd_powerdown = _cmd_shutdown
+
+
+def _cmd_halt(client, args):
+ client.shutdown('halt')
+
+
+def _cmd_reboot(client, args):
+ client.shutdown('reboot')
+
+
+commands = [m.replace('_cmd_', '') for m in dir() if '_cmd_' in m]
+
+
+def main(address, cmd, args):
+ if not os.path.exists(address):
+ print('%s not found' % address)
+ sys.exit(1)
+
+ if cmd not in commands:
+ print('Invalid command: ' + cmd)
+ print('Available commands: ' + ', '.join(commands))
+ sys.exit(1)
+
+ try:
+ client = QemuGuestAgentClient(address)
+ except QemuGuestAgent.error, e:
+ import errno
+
+ print(e)
+ if e.errno == errno.ECONNREFUSED:
+ print('Hint: qemu is not running?')
+ sys.exit(1)
+
+ if cmd != 'ping':
+ client.sync()
+
+ globals()['_cmd_' + cmd](client, args)
+
+
+if __name__ == '__main__':
+ import sys
+ import os
+ import optparse
+
+ address = os.environ['QGA_CLIENT_ADDRESS'] if 'QGA_CLIENT_ADDRESS' in os.environ else None
+
+ usage = "%prog [--address=<unix_path>|<ipv4_address>] <command> [args...]\n"
+ usage += '<command>: ' + ', '.join(commands)
+ parser = optparse.OptionParser(usage=usage)
+ parser.add_option('--address', action='store', type='string',
+ default=address, help='Specify a ip:port pair or a unix socket path')
+ options, args = parser.parse_args()
+
+ address = options.address
+ if address is None:
+ parser.error('address is not specified')
+ sys.exit(1)
+
+ if len(args) == 0:
+ parser.error('Less argument')
+ sys.exit(1)
+
+ main(address, args[0], args[1:])