@brief Update the configuration flags of a single GPIO line. @param line GPIO line object. @param flags Replacement flags. @return 0 is the operation succeeds. In case of an error this routine returns -1 and sets the last error number.
See Implementation
@brief Update the configuration flags of a single GPIO line. @param line GPIO line object. @param flags Replacement flags. @return 0 is the operation succeeds. In case of an error this routine returns -1 and sets the last error number.