Fix relative paths in the wrapper scripts

scripts/start_client

 #!/bin/bash
 
+script_dir=$(dirname $(realpath $0))
+
 usage() {
   echo "Usage: $0 -e delta|-p [-i INTERVAL]" 1>&2;
   exit 1;
@@ -35,9 +37,13 @@ if [ -n "${use_etf}" ] && [ -n "${use_pfast}" ]; then
 fi
 
 if [ -n "${use_etf}" ]; then
-  ./create_qdisc -e $delta;
-  ../packet-exchange/build/client_arm -ae -p 99 -q 7 -f eth0 -i $interval 192.168.99.25;
+  echo "$script_dir/create_qdisc -e $delta";
+  $script_dir/create_qdisc -e $delta;
+  echo "$script_dir/../packet-exchange/build/client_arm -ae -p 99 -q 7 -f eth0 -i $interval 192.168.99.25";
+  $script_dir/../packet-exchange/build/client_arm -ae -p 99 -q 7 -f eth0 -i $interval 192.168.99.25;
 elif [ -n "${use_pfast}" ]; then
-  ./create_qdisc -p;
-  ../packet-exchange/build/client_arm -a -p 99 -q 1 -f eth0 -i $interval 192.168.99.25;
+  echo "$script_dir/create_qdisc -p";
+  $script_dir/create_qdisc -p;
+  echo "$script_dir/../packet-exchange/build/client_arm -a -p 99 -q 1 -f eth0 -i $interval 192.168.99.25";
+  $script_dir/../packet-exchange/build/client_arm -a -p 99 -q 1 -f eth0 -i $interval 192.168.99.25;
 fi

scripts/start_server

 #!/bin/bash
 
+script_dir=$(dirname $(realpath $0))
+
 usage() {
   echo "Usage: $0 [-t NB_PACKETS]" 1>&2;
   exit 1;
@@ -20,9 +22,13 @@ done
 shift $((OPTIND-1))
 
 if [ -n "${use_tcpdump}" ]; then
+  echo "tcpdump -c $nb_packets -i eth0 -w tmp.pcap -tt --time-stamp-precision=nano udp port 50000";
   tcpdump -c $nb_packets -i eth0 -w tmp.pcap -tt --time-stamp-precision=nano udp port 50000;
+  echo "tshark -r tmp.pcap --disable-protocol dcp-etsi --disable-protocol dcp-pft -t e -E separator=, -T fields -e frame.number -e frame.time_epoch -e data.data > tmp.out";
   tshark -r tmp.pcap --disable-protocol dcp-etsi --disable-protocol dcp-pft -t e -E separator=, -T fields -e frame.number -e frame.time_epoch -e data.data > tmp.out;
-  ./txtime_stats.py -f tmp.out;
+  echo "$script_dir/txtime_stats.py -f tmp.out";
+  $script_dir/txtime_stats.py -f tmp.out;
 else
-  ../packet-exchange/build/server_arm -a -p 99;
+  echo "$script_dir/../packet-exchange/build/server_arm -a -p 99";
+  $script_dir/../packet-exchange/build/server_arm -a -p 99;
 fi