waitpid - WIFEXITED returning 0 although child exited normally
https://stackoverflow.com/questions/23262887/waitpid-wifexited-returning-0-although-child-exited-normally
webWIFEXITED(status) returns true if the child terminated normally, that is, by calling exit(3) or. _exit(2), or by returning from main(). Which I intepret to mean it should return an integer != 0 on success, which is not happening in the execution of my program, since I observe WIFEXITED (status) == 0.
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