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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_POL- ICY_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 re- turned. 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 re- turned. ERRORS CS_ERR_BAD_HANDLE health checking was not started by calling sam_start(3) func- tion. 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 interrupted by a signal CS_ERR_NOT_SUPPORTED The requested protocol/functionality not supported CS_ERR_MESSAGE_ERROR Incorrect auth message received CS_ERR_NO_MEMORY Not enough memory to complete the requested task corosync Man Page 12/01/2009 SAM_REGISTER(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | SEE ALSO
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