--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4405, 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=4420, 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=4418, 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=4421, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} ---
+++ exited with 0 +++