Bob Lantz
55dd936829
Fixed xterm.py (and cleanup) to clean up screen sessions. Cleaned up sshd.py (though interface is still in flux.) Added 1024-node network example (treenet1024.py). Added example showing multiple tests on a single network (multitest.py). Renamed examples to make them easier to type!
53 lines
1.5 KiB
Python
Executable File
53 lines
1.5 KiB
Python
Executable File
#!/usr/bin/python
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"""
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Create a network and run an xterm (connected via screen(1) ) on each
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host. Requires xterm(1) and GNU screen(1).
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"""
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import os, re
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from subprocess import Popen
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from mininet import init, TreeNet, Cli, quietRun
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def makeXterm( node, title ):
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"Run screen on a node, and hook up an xterm."
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node.cmdPrint( 'screen -dmS ' + node.name )
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title += ': ' + node.name
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if not node.inNamespace: title += ' (root)'
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cmd = [ 'xterm', '-title', title ]
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cmd += [ '-e', 'screen', '-D', '-RR', '-S', node.name ]
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return Popen( cmd )
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def cleanUpScreens():
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"Remove moldy old screen sessions."
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r = r'(\d+.[hsc]\d+)'
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output = quietRun( 'screen -ls' ).split( '\n' )
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for line in output:
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m = re.search( r, line )
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if m is not None:
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quietRun( 'screen -S ' + m.group( 1 ) + ' -X kill' )
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def makeXterms( nodes, title ):
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terms = []
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for node in nodes:
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if not node.execed:
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terms += [ makeXterm( node, title ) ]
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return terms
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def xterms( controllers, switches, hosts ):
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cleanUpScreens()
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terms = []
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terms += makeXterms( controllers, 'controller' )
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terms += makeXterms( switches, 'switch' )
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terms += makeXterms( hosts, 'host' )
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# Wait for xterms to exit
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for term in terms:
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os.waitpid( term.pid, 0 )
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cleanUpScreens()
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if __name__ == '__main__':
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init()
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print "Running xterms on", os.environ[ 'DISPLAY' ]
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network = TreeNet( depth=2, fanout=2, kernel=True )
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network.run( xterms )
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