[root@domain logs]# strace -p 1586
Process 1586 attached - interrupt to quit
wait4(-1,
<unfinished ...>
Process 1586 detached
[root@domain logs]# strace -p 10060
Process 10060 attached - interrupt to quit
select(1, [0], NULL, NULL, {0, 356000}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = ? ERESTARTNOHAND (To be restarted)
--- SIGCHLD (Child exited) @ 0 (0) ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG|WSTOPPED, NULL) = 10110
wait4(-1, 0x7fff1a3d861c, WNOHANG|WSTOPPED, NULL) = 0
rt_sigreturn(0xffffffffffffffff) = -1 EINTR (Interrupted system call)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0}) = ? ERESTARTNOHAND (To be restarted)
--- SIGCHLD (Child exited) @ 0 (0) ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG|WSTOPPED, NULL) = 10197
wait4(-1, 0x7fff1a3d861c, WNOHANG|WSTOPPED, NULL) = 0
rt_sigreturn(0xffffffffffffffff) = -1 EINTR (Interrupted system call)
select(1, [0], NULL, NULL, {1, 0}) = 0 (Timeout)
getppid() = 3572
select(1, [0], NULL, NULL, {1, 0} <unfinished ...>
Process 10060 detached