--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=15396, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=15397, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=15393, 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=15394, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} ---
+++ exited with 0 +++