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sam_register

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)

corosync Man Page						    12/01/2009							   SAM_REGISTER(3)