strace -s 1024 -v -p 3771 -e trace=network -f
Process 3775 attached with 5 threads - interrupt to quit
Process 4028 attached (waiting for parent)
Process 4028 resumed (parent 3771 ready)
Process 4028 detached
[pid  3772] --- SIGCHLD (Child exited) @ 0 (0) ---
[pid  3771] socketpair(PF_FILE, SOCK_STREAM, 0, [14, 16]) = 0
[pid  3771] socketpair(PF_FILE, SOCK_STREAM, 0, [17, 18]) = 0
[pid  3771] socketpair(PF_FILE, SOCK_STREAM, 0, [19, 20]) = 0
Process 4029 attached (waiting for parent)
Process 4029 resumed (parent 3771 ready)
[pid  4029] setsockopt(18, SOL_SOCKET, SO_LINGER, {onoff=0, linger=0}, 8) = 0
[pid  4029] setsockopt(20, SOL_SOCKET, SO_LINGER, {onoff=0, linger=0}, 8) = 0
Process 4033 attached (waiting for parent)
Process 4033 resumed (parent 3771 ready)
Process 3771 suspended
Process 4034 attached (waiting for parent)
Process 4034 resumed (parent 4033 ready)
Process 3771 resumed
Process 4033 detached
[pid  3771] --- SIGCHLD (Child exited) @ 0 (0) ---
Process 4034 detached
Process 4035 attached (waiting for parent)
Process 4035 resumed (parent 3771 ready)
Process 3771 suspended
Process 4036 attached (waiting for parent)
Process 4036 resumed (parent 4035 ready)
Process 3771 resumed
Process 4035 detached
[pid  3771] --- SIGCHLD (Child exited) @ 0 (0) ---
[pid  4036] --- SIGPIPE (Broken pipe) @ 0 (0) ---
Process 4037 attached (waiting for parent)
Process 4037 resumed (parent 3771 ready)
Process 3771 suspended
Process 4038 attached (waiting for parent)
Process 4038 resumed (parent 4037 ready)
Process 3771 resumed
Process 4037 detached
[pid  3771] --- SIGCHLD (Child exited) @ 0 (0) ---
Process 4038 detached
Process 4036 detached
Process 4039 attached (waiting for parent)
Process 4039 resumed (parent 3771 ready)
Process 3771 suspended
Process 4040 attached (waiting for parent)
Process 4040 resumed (parent 4039 ready)
Process 3771 resumed
Process 4039 detached
[pid  3771] --- SIGCHLD (Child exited) @ 0 (0) ---
[pid  4040] --- SIGPIPE (Broken pipe) @ 0 (0) ---
Process 4040 detached
upeek: ptrace(PTRACE_PEEKUSER,4029,120,0): No such process
Process 4029 detached
[pid  3771] --- SIGCHLD (Child exited) @ 0 (0) ---