If my understanding of what Linus says in the post referenced below is correct, there's never a guarantee which process would run first, parent or child. http://yarchive.net/comp/linux/child-runs-first.html vfork(), on the other hand, is said in the post to always run the child process first. See below for an example. #include <stdio.h> #include <unistd.h> #include <sys/time.h> #include <stdlib.h> int main(void) { struct timeval tv; switch(vfork()) { case -1: perror("vfork failed\n"); exit(-1); case 0: if (gettimeofday(&tv, NULL) == 0) printf("child time sec %ld, usec %ld\n", tv.tv_sec, tv.tv_usec); exit(0); default: if (gettimeofday(&tv, NULL) == 0) printf("parent time sec %ld, usec %ld\n", tv.tv_sec, tv.tv_usec); } return 0; } Sample run: ./gettimeofday child time sec 1512719270, usec 716672 parent time sec 1512719270, usec 716748 _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
