fi
exit 0
+{endcode}
+
+{subsection: Copying a file from one node to another}
+
+Here is a more sophisticated example, using the nc program (netcat) to copy a
+file from one machine to another. Note that there is no security at all in
+this file copy, any process on the network can connect and send data to the listening process, so you'd only want to run this on a trusted, protected network.
+
+The submit file is the same as above, but the run.sh is a bit more involved:
+
+{code}
+#!/bin/sh
+
+CONDOR_CHIRP=`condor_config_val LIBEXEC`/condor_chirp
+
+# Tell chirp where the chirp config file is
+export _CONDOR_CHIRP_CONFIG=$_CONDOR_SCRATCH_DIR/.chirp_config
+
+if [[ $_CONDOR_PROCNO = "0" ]]
+then
+
+ # I'm the server
+
+ # Start netcat listening on an ephemeral port (0 means kernels picks port)
+ # It will wait for a connection, then write that data to output_file
+
+ nc -l 0 > output_file &
+
+ # pid of the nc running in the background
+ NCPID=$!
+
+ # Sleep a bit to ensure nc is running
+ sleep 2
+
+ # parse the actual port selected from netstat output
+ NCPORT=`
+ netstat -t -a -p 2>/dev/null |
+ grep " $NCPID/nc" |
+ awk -F: '{print $2}' | awk '{print $1}'
+ `
+
+ # grab the hostname
+ HOSTNAME=`hostname`
+
+ $CONDOR_CHIRP set_job_attr JobServerAddress \"${HOSTNAME}\ ${NCPORT}\"
+
+ # Do other server things here...
+ sleep 3600
+ exit 0
+fi
+
+
+if [[ $_CONDOR_PROCNO = "1" ]]
+then
+
+ # I'm the client
+
+ sleep 20
+ # Poll until the job attribute appears in the ad
+
+ until $CONDOR_CHIRP get_job_attr JobServerAddress > /tmp/null 2>&1
+ do
+ sleep 2
+ done
+
+ JobServerAddress=`$CONDOR_CHIRP get_job_attr JobServerAddress`
+
+ host=`echo $JobServerAddress | tr -d '"' | awk '{print $1}'`
+ port=`echo $JobServerAddress | tr -d '"' | awk '{print $2}'`
+
+ # Send the /etc/hosts file to the other side
+ nc $host $port < /etc/hosts
+
+ # Don't do any other client stuff, just exit
+ exit 0
+fi
+
+exit 0
+
+
+
{endcode}
