/* Old GNU Format. The sparse file information is stored in the
oldgnu_header in the following manner:
The header is marked with type 'S'. Its `size' field contains
the cumulative size of all non-empty blocks of the file. The
actual file size is stored in `realsize' member of oldgnu_header.
/* Old GNU Format. The sparse file information is stored in the
oldgnu_header in the following manner:
The header is marked with type 'S'. Its `size' field contains
the cumulative size of all non-empty blocks of the file. The
actual file size is stored in `realsize' member of oldgnu_header.