sam_register(3) [centos man page]

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

NAME

       sam_rehister - Register component for health checking

SYNOPSIS

       #include <corosync/sam.h>

       cs_error_t sam_register (unsigned int *instance_id);

DESCRIPTION

       The  sam_register  function is used to register a process for healthchecking.  If recovery policy is set to SAM_RECOVERY_POLICY_RESTART and
       recovery action will be taken, the new process instance will begin execution at the next code line after this function is called.

       This function can be called only once and SAM must be initialized by sam_initialize(3) function.

       The instance_id argument is a pointer to a value storing the current iteration instance.  If this parameter  is	NULL,  no  instance_id	is
       returned.  and then, no instance_id will be returned. This value starts at 0 for the first iteration instance, and increases by 1 each time
       a recovery restart is executed.	After reaching MAX_INT, the instance_id will reset to 0.

       The placement of this function is important because after it is called, the process id will change.

       After registration, event driven health checking is not running.

RETURN VALUE

       This call return CS_OK value if successful, otherwise and error is returned.

ERRORS

       CS_ERR_BAD_HANDLE
	      health checking was not started by calling sam_start(3) function.

       CS_ERR_LIBRARY
	      internal library call failed. This can be one of pipe creation or fork.  It's possible to get more information from errno.

SEE ALSO

       sam_start(3), sam_initialize(3), sam_hc_callback_register(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						    12/01/2009							   SAM_REGISTER(3)

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

NAME

       votequorum_trackstart - Enable callbacks notification.

SYNOPSIS

       #include <corosync/votequorum.h>

       int votequorum_trackstart(votequorum_handle_t *handle, uint64_t context, unsigned int flags);

DESCRIPTION

       The votequorum_trackstart function is used to enable callbacks notification from the votequorum API.

       Every  time  the  voting  configuraton  changes	(eg  a	node joins or leave the cluster) or the quorum status change or the expected votes
       changes, the notification is queued.

       The notification is dispatched via votequorum_dispatch() function that will execute the callback.

       The context option allows to set a tracking context.

       The flags argument is defined by one or more of the following values and values can be bitwise-or'd

       #define CS_TRACK_CURRENT      0x01
       #define CS_TRACK_CHANGES      0x02
       #define CS_TRACK_CHANGES_ONLY 0x04

RETURN VALUE

       This call returns the CS_OK value if successful, otherwise an error is returned.

ERRORS

       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

SEE ALSO

       votequorum_overview(8),	votequorum_initialize(3),   votequorum_finalize(3),   votequorum_getinfo(3),   votequorum_trackstop(3),   votequo-
       rum_fd_get(3),	 votequorum_dispatch(3),   votequorum_context_set(3),	votequorum_context_get(3),   votequorum_setexpected(3),   votequo-
       rum_setvotes(3)

corosync Man Page						    2014-06-10						  VOTEQUORUM_TRACKSTART(3)

Linux and UNIX Man Pages

sam_register(3) [centos man page]

Check Out this Related Man Page