pid3 822 user/usertests.c int pid1, pid2, pid3; pid3 844 user/usertests.c pid3 = fork(); pid3 845 user/usertests.c if(pid3 < 0) { pid3 849 user/usertests.c if(pid3 == 0){ pid3 867 user/usertests.c kill(pid3);