Manual Pages for UNIX Operating System command usage for man sysevent_unbind_handle

System Event Library Functions    sysevent_bind_handle(3SYSEVENT)



NAME
     sysevent_bind_handle,  sysevent_unbind_handle  -   bind   or
     unbind subscriber handle

SYNOPSIS
     cc [flag...]  file ... -lsysevent [library ...]
     #include 

     sysevent_handle_t *sysevent_bind_handle(void (*event_handler)
          (sysevent_t *ev));


     void sysevent_unbind_handle(sysevent_handle_t *sysevent_hdl);


PARAMETERS
     ev               pointer to sysevent buffer handle


     event_handler    pointer to an event handling function


     sysevent_hdl     pointer to a sysevent subscriber handle


DESCRIPTION
     The sysevent_bind_handle() function allocates memory associ-
     ated with a subscription handle and binds it to the caller's
     event_handler.  The event_handler is invoked  during  subse-
     quent  system  event  notifications  once a subscription has
     been made with sysevent_subscribe_event(3SYSEVENT).


     The system event is represented by the argument  ev  and  is
     passed  as  an  argument to the invoked event delivery func-
     tion, event_handler.


     Additional threads  are  created  to  service  communication
     between syseventd(1M) and the calling process and to run the
     event handler routine, event_handler.


     The sysevent_unbind_handle() function deallocates memory and
     other  resources  associated  with a subscription handle and
     deactivates all system event notifications for  the  calling
     process.   All  event  notifications  are guaranteed to stop
     upon return from sysevent_unbind_handle().

RETURN VALUES
     The sysevent_bind_handle() function returns a valid sysevent
     subscriber  handle  if the handle is successfully allocated.



SunOS 5.11          Last change: 24 Jul 2009                    1






System Event Library Functions    sysevent_bind_handle(3SYSEVENT)



     Otherwise, NULL is returned and errno is set to indicate the
     error.


     The sysevent_unbind_handle() function returns no value.

ERRORS
     The sysevent_bind_handle() function will fail if:

     EACCES    The calling process  has  an  ID  other  than  the
               privileged user.


     EBUSY     There are no resources available.


     EINVAL    The pointer to the function event_handler is NULL.


     EMFILE    The process has too many open descriptors.


     ENOMEM    There are insufficient resources to  allocate  the
               handle.


ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|


SEE ALSO
     syseventd(1M),  sysevent_subscribe_event(3SYSEVENT),  attri-
     butes(5)

NOTES
     Event notifications are revoked by syseventd when the  bound
     process  dies.   Event notification is suspended if a signal
     is caught and handled by the  event_handler  thread.   Event
     notification  is  also  suspended  when  the calling process
     attempts to use fork(2) or  fork1(2).   Event  notifications
     might be lost during suspension periods.



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System Event Library Functions    sysevent_bind_handle(3SYSEVENT)



     The libsysevent interfaces do not work at all in  non-global
     zones.





















































SunOS 5.11          Last change: 24 Jul 2009                    3