This patch adds a quick check in "xm save" to make sure the path given

exists, and is writable.

This will fix the issue detected by xm-test 03_save_bogusfile_neg.

Signed-off-by: Dan Smith <danms@us.ibm.com>
Signed-off-by: Ewan Mellor <ewan@xensource.com>

tools/python/xen/xm/main.py

@@ -175,6 +175,10 @@ def xm_save(args):
 
     dom = args[0] # TODO: should check if this exists
     savefile = os.path.abspath(args[1])
+
+    if not os.access(os.path.dirname(savefile), os.W_OK):
+        err("xm save: Unable to create file %s" % savefile)
+        sys.exit(1)
     
     from xen.xend.XendClient import server
     server.xend_domain_save(dom, savefile)