--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4618, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4621, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4620, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
+++ exited with 0 +++