104 Bring back lx brand

@@ -124,10 +124,16 @@
 #else
 #define DDBG(a, b)
 #define DDBGP(a, b)
 #endif
 
+typedef struct __ptmptsopencb_arg *ptmptsopencb_arg_t;
+typedef struct ptmptsopencb {
+        boolean_t               (*ppocb_func)(ptmptsopencb_arg_t);
+        ptmptsopencb_arg_t      ppocb_arg;
+} ptmptsopencb_t;
+
 #endif /* _KERNEL */
 
 typedef struct pt_own {
         uid_t   pto_ruid;
         gid_t   pto_rgid;

@@ -155,10 +161,23 @@
 #define UNLKPT          (('P'<<8)|2)    /* unlock master/slave pair */
 #define PTSSTTY         (('P'<<8)|3)    /* set tty flag */
 #define ZONEPT          (('P'<<8)|4)    /* set zone of master/slave pair */
 #define OWNERPT         (('P'<<8)|5)    /* set owner/group for slave device */
 
+#ifdef _KERNEL
+/*
+ * kernel ioctl commands
+ *
+ * PTMPTSOPENCB: Returns a callback function pointer and opaque argument.
+ *            The return value of the callback function when it's invoked
+ *            with the opaque argument passed to it will indicate if the
+ *            pts slave device is currently open.
+ */
+#define PTMPTSOPENCB    (('P'<<8)|6)    /* check if the slave is open */
+
+#endif /* _KERNEL */
+
 #ifdef  __cplusplus
 }
 #endif
 
 #endif  /* _SYS_PTMS_H */