470            PyObject *preexec_fn,  in child_exec()  argument
575     if (preexec_fn != Py_None && preexec_fn_args_tuple) {  in child_exec()
577         result = PyObject_Call(preexec_fn, preexec_fn_args_tuple, NULL);  in child_exec()
669              PyObject *preexec_fn,  in do_fork_exec()  argument
681         assert(preexec_fn == Py_None);  in do_fork_exec()
699     if (preexec_fn != Py_None) {  in do_fork_exec()
713                py_fds_to_keep, preexec_fn, preexec_fn_args_tuple);  in do_fork_exec()
724     PyObject *env_list, *preexec_fn;  in subprocess_fork_exec()  local
754             &preexec_fn))  in subprocess_fork_exec()
757     if ((preexec_fn != Py_None) &&  in subprocess_fork_exec()
782     if (preexec_fn != Py_None) {  in subprocess_fork_exec()
920     if (preexec_fn != Py_None) {  in subprocess_fork_exec()
933     if (preexec_fn == Py_None &&  in subprocess_fork_exec()
959                        py_fds_to_keep, preexec_fn, preexec_fn_args_tuple);  in subprocess_fork_exec()