door_info(3DOOR)					      Door Library Functions						  door_info(3DOOR)

NAME

       door_info - return information associated with a door descriptor

SYNOPSIS

       cc [ flag ... ] file ... -ldoor [ library ... ]
       #include <door.h>

       int door_info(int d, struct door_info *info);

DESCRIPTION

       The  door_info()  function  returns  information  associated with a door descriptor. It obtains information about the door descriptor d and
       places the information that is relevant to the door in the structure pointed to by the info argument.

       The door_info structure pointed to by the info argument contains the following members:

       pid_t	       di_target;      /* door server pid */
       door_ptr_t      di_proc;        /* server function */
       door_ptr_t      di_data;        /* data cookie for invocation */
       door_attr_t     di_attributes;  /* door attributes */
       door_id_t       di_uniquifier;  /* unique id among all doors */

       The di_target member is the process ID of the door server, or -1 if the door server process has exited.

       The values for  di_attributes may be composed of the following:

       DOOR_LOCAL	       The door descriptor refers to a service procedure in this process.

       DOOR_UNREF	       The door has requested notification when all but the last reference has gone away.

       DOOR_UNREF_MULTI        Similar to DOOR_UNREF, except multiple unreferenced notifications may be delivered for this door.

       DOOR_IS_UNREF	       There is currently only one descriptor referring to the door.

       DOOR_REFUSE_DESC        The door refuses any attempt to door_call(3DOOR) it with argument descriptors.

       DOOR_REVOKED	       The door descriptor refers to a door that has been revoked.

       DOOR_PRIVATE	       The door has a separate pool of server threads associated with it.

       The di_proc and	di_data members are returned as door_ptr_t objects rather than void * pointers to allow clients and servers to	interoper-
       ate  in environments where the pointer sizes may vary in size (for example, 32-bit clients and 64-bit servers). Each door has a system-wide
       unique number associated with  it that is set when the door is created by door_create(). This number is returned in di_uniquifier.

RETURN VALUES

       Upon successful completion,  0 is returned. Otherwise,  -1 is returned and  errno is set to indicate the error.

ERRORS

       The  door_info() function will fail if:

       EFAULT	       The address of argument info is an invalid address.

       EBADF	       d is not a door descriptor.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Architecture		     |all			   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       door_bind(3DOOR), door_call(3DOOR), door_create(3DOOR), door_server_create(3DOOR), libdoor(3LIB), attributes(5)

SunOS 5.10							    14 Feb 2003 						  door_info(3DOOR)