1 files changed, 92 insertions, 0 deletions
diff --git a/src/lib/Bcfg2/Server/Plugins/Ohai.py b/src/lib/Bcfg2/Server/Plugins/Ohai.py
new file mode 100644
index 000000000..5fff20d98
--- /dev/null
+++ b/src/lib/Bcfg2/Server/Plugins/Ohai.py
@@ -0,0 +1,92 @@
+import lxml.etree
+import os
+
+import logging
+logger = logging.getLogger('Bcfg2.Plugins.Ohai')
+
+import Bcfg2.Server.Plugin
+
+try:
+    import json
+except:
+    # FIXME: can be removed when server prereq is >= python 2.6
+    # necessary for clients without the in-tree json module
+    try:
+        import simplejson as json
+    except:
+        logger.error("Unable to load any json modules. Make sure "
+                     "python-simplejson is installed.")
+        raise ImportError
+
+
+probecode = """#!/bin/sh
+
+export PATH=$PATH:/sbin:/usr/sbin
+
+if type ohai >& /dev/null; then
+    ohai
+else
+    # an empty dict, so "'foo' in metadata.Ohai" tests succeed
+    echo '{}'
+fi
+"""
+
+class OhaiCache(object):
+    def __init__(self, dirname):
+        self.dirname = dirname
+        self.cache = dict()
+
+    def __setitem__(self, item, value):
+        if value == None:
+            # simply return if the client returned nothing
+            return
+        self.cache[item] = json.loads(value)
+        file("%s/%s.json" % (self.dirname, item), 'w').write(value)
+
+    def __getitem__(self, item):
+        if item not in self.cache:
+            try:
+                data = open("%s/%s.json" % (self.dirname, item)).read()
+            except:
+                raise KeyError(item)
+            self.cache[item] = json.loads(data)
+        return self.cache[item]
+
+    def __iter__(self):
+        data = list(self.cache.keys())
+        data.extend([x[:-5] for x in os.listdir(self.dirname)])
+        return data.__iter__()
+
+
+class Ohai(Bcfg2.Server.Plugin.Plugin,
+           Bcfg2.Server.Plugin.Probing,
+           Bcfg2.Server.Plugin.Connector):
+    """The Ohai plugin is used to detect information
+    about the client operating system.
+    """
+    name = 'Ohai'
+    experimental = True
+
+    def __init__(self, core, datastore):
+        Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
+        Bcfg2.Server.Plugin.Probing.__init__(self)
+        Bcfg2.Server.Plugin.Connector.__init__(self)
+        self.probe = lxml.etree.Element('probe', name='Ohai', source='Ohai',
+                                        interpreter='/bin/sh')
+        self.probe.text = probecode
+        try:
+            os.stat(self.data)
+        except:
+            os.makedirs(self.data)
+        self.cache = OhaiCache(self.data)
+
+    def GetProbes(self, meta, force=False):
+        return [self.probe]
+
+    def ReceiveData(self, meta, datalist):
+        self.cache[meta.hostname] = datalist[0].text
+
+    def get_additional_data(self, meta):
+        if meta.hostname in self.cache:
+            return self.cache[meta.hostname]
+        return dict()