sam_data_getsize - Return size of stored data in bytes

       The  sam_data_getsize  function is used to return size of stored data. Size is returned in bytes. If user
       data is NULL, zero is returned.  Function is intended to  be  used  before  sam_data_restore(3)  call  to
       properly allocate buffer for restored data.

       CS_ERR_BAD_HANDLE
              component was not initialized by calling sam_initialize(3) or it was finalized.

       CS_ERR_INVALID_PARAM
              size parameter is NULL

       sam_data_getsize - Return size of stored data in bytes

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

sam_data_store(3), sam_data_restore(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                                  04/15/2010                                SAM_DATA_GETSIZE(3)

#include<corosync/sam.h>cs_error_tsam_data_getsize(size_t*size);