From 237a3c54cfb0a3c2e320bd5148c860b8cdcd002b Mon Sep 17 00:00:00 2001
From: Bob Lantz <rlantz@cs.stanford.edu>
Date: Thu, 12 Apr 2012 23:33:41 -0700
Subject: [PATCH] Begin test/example for popen().

---
 examples/popen.py | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100755 examples/popen.py

diff --git a/examples/popen.py b/examples/popen.py
new file mode 100755
index 0000000..d9ddd7a
--- /dev/null
+++ b/examples/popen.py
@@ -0,0 +1,30 @@
+#!/usr/bin/python
+
+"""
+This example tests the Host.popen()/pexec() interface
+"""
+
+from mininet.net import Mininet
+from mininet.node import CPULimitedHost
+from mininet.topo import SingleSwitchTopo
+from mininet.log import setLogLevel
+# from mininet.cli import CLI
+from mininet.util import custom
+
+def testpopen(sched='cfs'):
+    "Test popen() interface"
+    host = custom( CPULimitedHost, cpu=.2, sched=sched )
+    net = Mininet( SingleSwitchTopo( 2 ), host=host )
+    net.start()
+    h1 = net.get( 'h1' )
+    # CLI(net)
+    out, err, code = h1.pexec( 'ifconfig' )
+    print 'stdout:', out.strip()
+    print 'stderr:', err.strip()
+    print 'exit code:', code
+    net.stop()
+
+if __name__ == '__main__':
+    setLogLevel( 'info' )
+    testpopen('rt')
+    testpopen('cfs')