Brandon Heller
15b482e375
Caution: code is incomplete - can't set a default type from the CLI and in some places the phrase xterm should be replaced by terminal.
56 lines
1.7 KiB
Python
56 lines
1.7 KiB
Python
"""
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Terminal creation and cleanup.
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Utility functions to run a term (connected via screen(1)) on each host.
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Requires GNU screen(1) and xterm(1).
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Optionally uses gnome-terminal.
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"""
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import re
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from subprocess import Popen
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from mininet.log import error
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from mininet.util import quietRun
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def makeTerm( node, title = '', term = 'xterm' ):
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"""Run screen on a node, and hook up an xterm.
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node: Node object
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title: base title
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returns: process created"""
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title += ': ' + node.name
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if not node.inNamespace:
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title += ' (root)'
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cmd = ''
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if term == 'xterm':
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cmd = [ 'xterm', '-title', title, '-e' ]
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elif term == 'gnome':
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cmd = [ 'gnome-terminal', '--title', title, '-e' ]
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else:
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error( 'invalid terminal type: %s' % term )
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return
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if not node.execed:
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node.cmd( 'screen -dmS ' + node.name)
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#cmd += [ 'screen', '-D', '-RR', '-S', node.name ]
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# Compress these for gnome-terminal, which expects one token to follow
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# the -e option .
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cmd += [ 'screen -D -RR -S ' + node.name ]
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else:
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cmd += [ 'sh', '-c', 'exec tail -f /tmp/' + node.name + '*.log' ]
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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:
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quietRun( 'screen -S ' + m.group( 1 ) + ' -X quit' )
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def makeTerms( nodes, title = '', term = 'xterm' ):
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"""Create terminals.
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nodes: list of Node objects
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title: base title for each
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returns: list of created terminal processes"""
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return [ makeTerm( node, title, term ) for node in nodes ]
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