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executable file 45 lines (35 sloc) 816 Bytes
#!/bin/bash
# Attach to a Mininet host and run a command
if [ -z $1 ]; then
echo "usage: $0 host cmd [args...]"
exit 1
else
host=$1
fi
pid=`ps ax | grep "mininet:$host$" | grep bash | grep -v mnexec | awk '{print $1};'`
if echo $pid | grep -q ' '; then
echo "Error: found multiple mininet:$host processes"
exit 2
fi
if [ "$pid" == "" ]; then
echo "Could not find Mininet host $host"
exit 3
fi
if [ -z $2 ]; then
cmd='bash'
else
shift
cmd=$*
fi
cgroup=/sys/fs/cgroup/cpu/$host
if [ -d "$cgroup" ]; then
cg="-g $host"
fi
# Check whether host should be running in a chroot dir
rootdir="/var/run/mn/$host/root"
if [ -d $rootdir -a -x $rootdir/bin/bash ]; then
cmd="'cd `pwd`; exec $cmd'"
cmd="chroot $rootdir /bin/bash -c $cmd"
fi
cmd="exec sudo mnexec $cg -a $pid $cmd"
eval $cmd