--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12288, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12321, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12330, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12338, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} ---
+++ exited with 0 +++