--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=30149, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=30148, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=30147, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=30146, si_uid=0, si_status=0, si_utime=0, si_stime=15 /* 0.15 s */} ---
+++ exited with 0 +++