Description

   The strncpy function copies no more than maxchar characters from
   source to dest, up to but not including the null terminator of
   source. If source contains less than maxchar characters, dest
   is padded with null characters. If source contains greater than
   or equal to maxchar characters, as many characters as possible
   are copied to dest. Be aware that the dest argument might not be
   terminated by a null character after a call to strncpy.