added ping plugin

plugins/ping.py

@@ -0,0 +1,32 @@
+# ping plugin by neersighted
+from util import hook
+import subprocess
+import re
+
+
+@hook.command
+def ping(inp):
+    ".ping <host> [count] -- Pings <host> [count] times."
+
+    args = inp.split(' ')
+    host = args[0]
+
+    if len(args) > 1:
+        count = args[1]
+        count = int(count)
+        if count > 20:
+            count = 20
+    else:
+        count = 5
+
+    count = str(count)
+
+    pingcmd = subprocess.check_output("ping -c "\
+                                    + count + " " + host, shell=True)
+    if 'request timed out' in pingcmd or 'unknown host' in pingcmd:
+        return "error: could not ping host"
+    else:
+        m = re.search(r"rtt min/avg/max/mdev = "\
+            "(\d+.\d+)/(\d+.\d+)/(\d+.\d+)/(\d+.\d+)", pingcmd)
+        return "min: %s, max: %s, average: %s, range: %s, count: %s"\
+        % (m.group(1), m.group(2), m.group(3), m.group(4), count)