qmp-shell: fix nested json regression

Commit fcfab7541 ("qmp-shell: learn to send commands with quoted
arguments") introduces the usage of Python 'shlex' to handle quoted
arguments, but it accidentally broke generation of nested JSON
structs.

shlex drops quotes, which breaks parsing of the nested struct.

cmd='blockdev-create job-id="job0 foo" options={"driver":"qcow2","size":16384,"file":{"driver":"file","filename":"foo.qcow2"}}'

shlex.split(cmd)
['blockdev-create',
 'job-id=job0 foo',
 'options={driver:qcow2,size:16384,file:{driver:file,filename:foo.qcow2}}']

Replace with a regexp to split while respecting quoted strings and preserving quotes:

re.findall(r'''(?:[^\s"']|"(?:\\.|[^"])*"|'(?:\\.|[^'])*')+''', cmd)
['blockdev-create',
 'job-id="job0 foo"',
 'options={"driver":"qcow2","size":16384,"file":{"driver":"file","filename":"foo.qcow2"}}']

Fixes: fcfab7541 ("qmp-shell: learn to send commands with quoted arguments")
Reported-by: Kashyap Chamarthy <kchamart@redhat.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20190205134926.8312-1-marcandre.lureau@redhat.com>
Tested-by: Kashyap Chamarthy <kchamart@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/scripts/qmp/qmp-shell b/scripts/qmp/qmp-shell
index 9fec46e..7776c7b 100755
--- a/scripts/qmp/qmp-shell
+++ b/scripts/qmp/qmp-shell
@@ -73,7 +73,7 @@ import sys
 import os
 import errno
 import atexit
-import shlex
+import re
 
 sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
 from qemu import qmp
@@ -222,7 +222,7 @@ class QMPShell(qmp.QEMUMonitorProtocol):
 
             < command-name > [ arg-name1=arg1 ] ... [ arg-nameN=argN ]
         """
-        cmdargs = shlex.split(cmdline)
+        cmdargs = re.findall(r'''(?:[^\s"']|"(?:\\.|[^"])*"|'(?:\\.|[^'])*')+''', cmdline)
 
         # Transactional CLI entry/exit:
         if cmdargs[0] == 'transaction(':