waitpid          1286 src/diff3.c      if (waitpid (pid, &wstatus, 0) < 0)
waitpid           686 src/sdiff.c    	while (waitpid (diffpid, &wstatus, 0) < 0)
waitpid          1057 src/sdiff.c    		while (waitpid (pid, &wstatus, 0) < 0)
waitpid           292 src/util.c           if (waitpid (pr_pid, &wstatus, 0) < 0)