aboutsummaryrefslogtreecommitdiffstats
path: root/QMP
diff options
context:
space:
mode:
authorLuiz Capitulino <lcapitulino@redhat.com>2009-11-26 22:59:09 -0200
committerAnthony Liguori <aliguori@us.ibm.com>2009-12-03 09:41:25 -0600
commitcedebdacd2307a3e4df9aec9839b12895c25e5f5 (patch)
tree09b4fb42724c989bab8f95d768e5821fed29a074 /QMP
parente2419113ddc6e1b7765a8ccebfc425e5547c7a19 (diff)
QMP: Introduce qmp-shell
This is a very simple shell written in Python for demonstration purposes. Unfortunately it's a bit awkward right now, as the user has to specify the arguments names and the printed data can be a raw dictionary or list, like the following example: (QEMU) pci_add pci_addr=auto type=nic {u'slot': 5, u'bus': 0, u'domain': 0, u'function': 0} (QEMU) It's worth to note that the shell is broken into two files. One is the shell itself, the other is the QMP class which handles the communication with QEMU. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'QMP')
-rwxr-xr-xQMP/qmp-shell72
-rw-r--r--QMP/qmp.py72
2 files changed, 144 insertions, 0 deletions
diff --git a/QMP/qmp-shell b/QMP/qmp-shell
new file mode 100755
index 000000000..f89b9af87
--- /dev/null
+++ b/QMP/qmp-shell
@@ -0,0 +1,72 @@
+#!/usr/bin/python
+#
+# Simple QEMU shell on top of QMP
+#
+# Copyright (C) 2009 Red Hat Inc.
+#
+# Authors:
+# Luiz Capitulino <lcapitulino@redhat.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 [...] -monitor control,unix:./qmp,server
+#
+# Run the shell:
+#
+# $ qmp-shell ./qmp
+#
+# Commands have the following format:
+#
+# < command-name > [ arg-name1=arg1 ] ... [ arg-nameN=argN ]
+#
+# For example:
+#
+# (QEMU) info item=network
+
+import qmp
+import readline
+from sys import argv,exit
+
+def shell_help():
+ print 'bye exit from the shell'
+
+def main():
+ if len(argv) != 2:
+ print 'qemu-shell <unix-socket>'
+ exit(1)
+
+ qemu = qmp.QEMUMonitorProtocol(argv[1])
+ qemu.connect()
+
+ print 'Connected!'
+
+ while True:
+ try:
+ cmd = raw_input('(QEMU) ')
+ except EOFError:
+ print
+ break
+ if cmd == '':
+ continue
+ elif cmd == 'bye':
+ break
+ elif cmd == 'help':
+ shell_help()
+ else:
+ try:
+ resp = qemu.send(cmd)
+ if resp == None:
+ print 'Disconnected'
+ break
+ print resp
+ except IndexError:
+ print '-> command format: <command-name> ',
+ print '[arg-name1=arg1] ... [arg-nameN=argN]'
+
+if __name__ == '__main__':
+ main()
diff --git a/QMP/qmp.py b/QMP/qmp.py
new file mode 100644
index 000000000..d9da603be
--- /dev/null
+++ b/QMP/qmp.py
@@ -0,0 +1,72 @@
+# QEMU Monitor Protocol Python class
+#
+# Copyright (C) 2009 Red Hat Inc.
+#
+# Authors:
+# Luiz Capitulino <lcapitulino@redhat.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2. See
+# the COPYING file in the top-level directory.
+
+import socket, json
+
+class QMPError(Exception):
+ pass
+
+class QMPConnectError(QMPError):
+ pass
+
+class QEMUMonitorProtocol:
+ def connect(self):
+ self.sock.connect(self.filename)
+ data = self.__json_read()
+ if data == None:
+ raise QMPConnectError
+ if not data.has_key('QMP'):
+ raise QMPConnectError
+ return data['QMP']['capabilities']
+
+ def close(self):
+ self.sock.close()
+
+ def send_raw(self, line):
+ self.sock.send(str(line))
+ return self.__json_read()
+
+ def send(self, cmdline):
+ cmd = self.__build_cmd(cmdline)
+ self.__json_send(cmd)
+ resp = self.__json_read()
+ if resp == None:
+ return
+ elif resp.has_key('error'):
+ return resp['error']
+ else:
+ return resp['return']
+
+ def __build_cmd(self, cmdline):
+ cmdargs = cmdline.split()
+ qmpcmd = { 'execute': cmdargs[0], 'arguments': {} }
+ for arg in cmdargs[1:]:
+ opt = arg.split('=')
+ try:
+ value = int(opt[1])
+ except ValueError:
+ value = opt[1]
+ qmpcmd['arguments'][opt[0]] = value
+ return qmpcmd
+
+ def __json_send(self, cmd):
+ # XXX: We have to send any additional char, otherwise
+ # the Server won't read our input
+ self.sock.send(json.dumps(cmd) + ' ')
+
+ def __json_read(self):
+ try:
+ return json.loads(self.sock.recv(1024))
+ except ValueError:
+ return
+
+ def __init__(self, filename):
+ self.filename = filename
+ self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)