Detach strace and tracee processes

-D option is used to detach strace and tracee processes. E.g.:

# strace -D ./dead_loop
strace: Process 19816 attached
......

Open another terminal to check the process relationship:

# ps -ef | grep dead
root     19816 19684  0 09:28 pts/0    00:00:00 ./dead_loop
root     19820     1  0 09:28 pts/0    00:00:00 strace -D ./dead_loop

You can see now dead_loop is not child process of strace.