437            int c2pread, int c2pwrite,  in child_exec()  argument
469     if (c2pwrite == 0) {  in child_exec()
470         POSIX_CALL(c2pwrite = dup(c2pwrite));  in child_exec()
472         if (_Py_set_inheritable_async_safe(c2pwrite, 0, NULL) < 0) {  in child_exec()
494     if (c2pwrite == 1) {  in child_exec()
495         if (_Py_set_inheritable_async_safe(c2pwrite, 1, NULL) < 0)  in child_exec()
498     else if (c2pwrite != -1)  in child_exec()
499         POSIX_CALL(dup2(c2pwrite, 1));  /* stdout */  in child_exec()
622     int p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite;  in subprocess_fork_exec()  local
643             &p2cread, &p2cwrite, &c2pread, &c2pwrite,  in subprocess_fork_exec()
866                    p2cread, p2cwrite, c2pread, c2pwrite,  in subprocess_fork_exec()