How to monitor process status during process lifetime | strace -f -p $! -o child.txt

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strace - trace system calls and signals
$ main.exec &
$ strace -f -p $! -o child.txt

-f  Trace  child  processes  as  they  are  created  by currently traced processes as a result of the fork(2), vfork(2) and clone(2) system calls. Note that -p PID -f will attach all threads of process PID if it is multi-threaded, not only thread with thread_id = PID

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