sample trace printing ppid
Add new member to proc_node with ppid and modify parsers(open, close, dup2). Set up dup2 constructure with some logs
Add adding child process as a new proc_node when dup2 catch new pid
mv trace2.txt to ppid_trace.txt to distinguish branch between master and ppid
Find parent trace_node and copy to child @dup2
on going dup2
for merging
merge ppid to master