Bring back LX zones.

*** 26,35 ****
--- 26,37 ----
  
  
  #ifndef _SYS_PTMS_H
  #define _SYS_PTMS_H
  
+ #pragma ident   "%Z%%M% %I%     %E% SMI"
+ 
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
  #ifdef _KERNEL
*** 124,133 ****
--- 126,141 ----
  #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;
*** 155,164 ****
--- 163,185 ----
  #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 */