csa_register_callback man page on HP-UX

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csa_register_callback(library call)	   csa_register_callback(library call)

       csa_register_callback  —	 register the callback functions to be invoked
       when the specified type of update occurs in the calendar

       #include <xcsa.h>
       CSA_return_code csa_register_callback(
       CSA_session_handle session,
       CSA_flags reason,
       CSA_callback callback,
       CSA_buffer client_data,
       CSA_extension *register_callback_extensions);

       The csa_register_callback function adds the callback procedure  to  the
       specified  callback  list for the session.  The service maintains a set
       of callback lists, logically one list per callback  activity  type  per
       session.	  The  service	reports changes to the state of the service or
       its calendars by invoking the appropriate callbacks  in	sequence  when
       the  client calls the csa_call_callbacks function or when the specified
       callback activity occurs.  The callback is only active for the duration
       of the calendar session.

   Session (Session Handle)
       Opaque  session	handle	that represents a session with the calendaring

       Session handles are created by a logon function	call  and  invalidated
       with  a	logoff	function call.	If the session handle is invalid, then
       the error CSA_E_INVALID_SESSION_HANDLE is returned.

   Reason (Flags)
       A bitmask of flags.  Unspecified flags should always be	passed	as  0.
       Undocumented  flags  are reserved.  Each flag corresponds to a callback
       activity and the specified procedure is added to the callback list  for
       that activity type.  Flag settings include:

		 If  set, the new callback will be invoked when a the calendar
		 is accessed by a user.

		 If set, the new callback will be invoked when a user requests
		 that the calendar be deleted.

		 If  set, the new callback will be invoked whenever a calendar
		 attribute is updated.

		 If set, the new callback will be invoked whenever an entry is
		 added to the calendar.

		 If set, the new callback will be invoked whenever an entry is
		 deleted from the calendar.

		 If set, the new callback will be invoked whenever an entry is
		 updated  on  the  calendar.  It is implementation specific if
		 the callback function is invoked before or after  the	speci‐
		 fied update type occurs.

   Callback (Callback)
       Specifies  the client procedure that should be called by the service to
       handle the callback activity.

   Client Data (Opaque Data)
       A pointer to a data structure that will be passed to the callback func‐
       tion in its client_data argument.  This can be used to pass client-spe‐
       cific data structure that will be needed by the	callback  function  to
       perform the task.

   Register Callback Extensions (Extension)
       A  pointer  to  an array of CSA_extension structures for this function.
       The array may contain both input extensions  for	 providing  additional
       information  to the function and output extensions for receiving infor‐
       mation from the function.  A value of NULL indicates that the caller is
       not using any extensions.  See the extensions structure for more infor‐

   Register Callback Extensions (Extension)
       If output extensions were passed to  the	 function  in  the  extensions
       list,  the results from the service will be available in the extension.
       See the extensions structure for more information.  Whether  the	 func‐
       tion  succeeded	or not, and, if not, why.  It may be success or one of
       the values listed under ERRORS below.

       The csa_register_callback function returns the following error values:

		 There was a general failure that does not fit the description
		 of any other error code.

		 Insufficient  memory  was available to complete the requested

		 A flag value in the flags argument was invalid.

		 The function extension requested is invalid.

		 A function parameter was invalid.

		 The specified Session Handle is invalid or  no	 longer	 valid
		 (e.g., after logging off).

		 The user has insufficient authority for this function.

		 The  operation requested is not supported by this implementa‐

		 The requested calendar service is unavailable.

		 The flag requested is not supported.

		 The  specified	 function  extension  is  not	supported   or

       csa/csa.h    -	 csacsa(5),   csa_add_calendar(3),   csa_add_entry(3),
       csa_call_callbacks(3),	csa_delete_calendar(3),	  csa_delete_entry(3),
       csa_free(3),  csa_free_time_search(3), csa_list_calendar_attributes(3),
       csa_list_calendars(3),				  csa_list_entries(3),
       csa_list_entry_attributes(3),		   csa_list_entry_sequence(3),
       csa_logoff(3),	csa_logon(3),	csa_look_up(3),	  csa_query_configura‐
       tion(3), csa_read_calendar_attributes(3), csa_read_entry_attributes(3),
       csa_read_next_reminder(3), csa_unregister_callback(3),  csa_update_cal‐
       endar_attributes(3), csa_update_entry_attributes(3).

					   csa_register_callback(library call)

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