envctrl_open
envctrl_open, /* cb_open */
static int envctrl_open(dev_t *, int, int, cred_t *);
putq, NULL, envctrl_open, envctrl_close, NULL, &envctrlinfo, NULL
envctrl_wput, NULL, envctrl_open, envctrl_close,
static int envctrl_open(queue_t *, dev_t *, int, int, cred_t *);