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%k
%b
%s
%S
(BLOCKSIZE*st_blocks /
st_size)
. The exact value you will get for an ordinary file of a
certain length is system-dependent. However, normally sparse files
will have values less than 1.0, and files which use indirect blocks
and have few holes may have a value which is greater than 1.0. The
value used for BLOCKSIZE is system-dependent, but is usually 512
bytes. If the file size is zero, the value printed is undefined. On
systems which lack support for st_blocks, a file's sparseness is
assumed to be 1.0.