in netinfo output (ci-info:), fill in empty fields with a "."

If you were trying to parse this output with something, an empty field would be
difficult to handle, as you'd have to know the expected lengths of each field.
The '.' means empty, but then all fields are non-whitespace delimited by one or
more whitespace.

1 files changed, 9 insertions, 2 deletions

diff --git a/cloudinit/netinfo.py b/cloudinit/netinfo.py
index be7ed3a9..80223256 100644
--- a/cloudinit/netinfo.py
+++ b/cloudinit/netinfo.py
@@ -22,7 +22,7 @@
 import subprocess
 
 
-def netdev_info():
+def netdev_info(empty=""):
     fields = ("hwaddr", "addr", "bcast", "mask")
     ifcfg_out = str(subprocess.check_output(["ifconfig", "-a"]))
     devs = {}
@@ -59,6 +59,13 @@ def netdev_info():
                         pass
                 elif toks[i].startswith("%s:" % field):
                     devs[curdev][target] = toks[i][len(field) + 1:]
+
+    if empty != "":
+        for (devname, dev) in devs.iteritems():
+            for field in dev:
+                if dev[field] == "":
+                    dev[field] = empty
+
     return(devs)
 
 
@@ -85,7 +92,7 @@ def getgateway():
 def debug_info(pre="ci-info: "):
     lines = []
     try:
-        netdev = netdev_info()
+        netdev = netdev_info(empty=".")
     except Exception:
         lines.append("netdev_info failed!")
         netdev = {}