set -o xtrace
curpwd=`pwd`
-TRACE_FILE=$1
-TRACEDIR=/sys/kernel/debug/tracing/
+TRACE_FILE=trace.txt
+TRACEDIR=/sys/kernel/debug/tracing
-sudo bash -c "echo 0 >$TRACEDIR/tracing_on"
+bash -c "echo 0 > $TRACEDIR/tracing_on"
sleep 1
-sudo bash -c "cat $TRACEDIR/trace > $TRACE_FILE"
-sudo bash -c "echo > $TRACEDIR/set_event"
-sudo bash -c "echo > $TRACEDIR/trace"
-sudo sysctl kernel.ftrace_enabled=0
-sudo bash -c "echo nop > $TRACEDIR/current_tracer"
+bash -c "cat $TRACEDIR/trace > /tmp/$TRACE_FILE"
+
+bash -c "echo > $TRACEDIR/set_event"
+bash -c "echo > $TRACEDIR/trace"
+sysctl kernel.ftrace_enabled=0
+bash -c "echo nop > $TRACEDIR/current_tracer"
set +o xtrace
cd $curpwd