pub fn pidfd_send_signal(pidfd: fd_t, sig: SIG, info: ?*siginfo_t, flags: u32) usize
pub fn pidfd_send_signal(pidfd: fd_t, sig: SIG, info: ?*siginfo_t, flags: u32) usize { return syscall4( .pidfd_send_signal, @as(u32, @bitCast(pidfd)), @backingInt(sig), @intFromPtr(info), flags, ); }