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[Qemu-trivial] [PATCH] qmp: allow setting properties to empty string in

From: Daniel P. Berrange
Subject: [Qemu-trivial] [PATCH] qmp: allow setting properties to empty string in qmp-shell
Date: Thu, 2 Mar 2017 12:24:29 +0000

The qmp-shell property parser currently rejects attempts to
set string properties to the empty string eg

  (QEMU) migrate-set-parameters  tls-hostname=
  Error while parsing command line: Expected a key=value pair, got 
command format: <command-name>  [arg-name1=arg1] ... [arg-nameN=argN]

This is caused by checking the wrong condition after splitting
the parameter on '='. The "partition" method will return "" for
the separator field, if the seperator was not present, so that
is the correct thing to check for malformed syntax.

Signed-off-by: Daniel P. Berrange <address@hidden>
 scripts/qmp/qmp-shell | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/qmp/qmp-shell b/scripts/qmp/qmp-shell
index 0373b24..eccb88a 100755
--- a/scripts/qmp/qmp-shell
+++ b/scripts/qmp/qmp-shell
@@ -166,8 +166,8 @@ class QMPShell(qmp.QEMUMonitorProtocol):
     def __cli_expr(self, tokens, parent):
         for arg in tokens:
-            (key, _, val) = arg.partition('=')
-            if not val:
+            (key, sep, val) = arg.partition('=')
+            if sep != '=':
                 raise QMPShellError("Expected a key=value pair, got '%s'" % 
             value = self.__parse_value(val)

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