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update interface IP address with pexec so that backgrounded process output from the cli cannot interfere

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cody burkard
2014-10-02 09:19:07 -07:00
parent ded25a9ef8
commit f1123e71ae
1 changed files with 3 additions and 1 deletions
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mininet/link.py
+3 -1
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@@ -86,7 +86,9 @@ class Intf( object ):
def updateIP( self ): def updateIP( self ):
"Return updated IP address based on ifconfig" "Return updated IP address based on ifconfig"
ifconfig = self.ifconfig() # use pexec instead of node.cmd so that we dont read
# backgrounded output from the cli.
ifconfig, _err, _exitCode = self.node.pexec( 'ifconfig %s' % self.name )
ips = self._ipMatchRegex.findall( ifconfig ) ips = self._ipMatchRegex.findall( ifconfig )
self.ip = ips[ 0 ] if ips else None self.ip = ips[ 0 ] if ips else None
return self.ip return self.ip