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CPG_JOIN(3)		   Corosync Cluster Engine Programmer's Manual		      CPG_JOIN(3)

       cpg_join - Joins one or more groups in the CPG library

       #include <corosync/cpg.h>

       int cpg_join(cpg_handle_t handle, struct cpg_name *group);

       The  cpg_join  function	is  used  to  join  one  group.   When	a  group  is  joined, the
       cpg_mcast_joined(3) is called internally to multicast to the groups joined in the argument
       handle.	 The  process  will also get notifications of other processes joining and leaving
       the group.  Messages that are sent to any of the groups joined  to  the	parameter  handle
       will be delivered by cpg_dispatch(3).

       This function may be only be called once for each handle. When a group has been joined the
       process will start to receive callbacks relating to messages  sent  from  members  of  the
       group or notifications of processes joining or leaving the group.

       Note  that  more  than one process on each node can join a CPG group and each will receive
       its own copy of any messages sent using cpg_mcast_joined() and its own confchg callback.

       The argument group is used to specify the group to join.

       The groups argument is of the type struct cpg_name which is defined by the structure:

	      struct cpg_name {
		      int length;
		      char value[128];

       This call returns the CS_OK value if successful, CS_ERR_INVALID_PARAM  if  the  handle  is
       already joined to a group.

       Not all errors are documented.

       cpg_overview(8),   cpg_initialize(3),   cpg_finalize(3),  cpg_fd_get(3),  cpg_dispatch(3),
       cpg_join(3),  cpg_leave(3),  cpg_mcast_joined(3),  cpg_membership_get(3)  cpg_zcb_alloc(3)
       cpg_zcb_free(3)	    cpg_zcb_mcast_joined(3)	cpg_context_get(3)     cpg_context_set(3)

       CS_ERR_TRY_AGAIN Resource temporarily unavailable

       CS_ERR_INVALID_PARAM Invalid argument

       CS_ERR_ACCESS Permission denied

       CS_ERR_LIBRARY The connection failed

       CS_ERR_INTERRUPT System call inturrupted by a signal

       CS_ERR_NOT_SUPPORTED The requested protocol/functuality not supported

       CS_ERR_MESSAGE_ERROR Incorrect auth message received

       CS_ERR_NO_MEMORY Not enough memory to completed the requested task

corosync Man Page			    2004-08-31				      CPG_JOIN(3)
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