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author | kientzle <kientzle@FreeBSD.org> | 2004-08-07 17:24:50 +0000 |
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committer | kientzle <kientzle@FreeBSD.org> | 2004-08-07 17:24:50 +0000 |
commit | 1ce8146dd9103f4dd0c4011cd2351aedea143f4a (patch) | |
tree | 2ebf388b77d91c64b6c0c96f93d0921cc72026b1 /lib/libarchive/tar.5 | |
parent | e9c1fd002b5b9b41f9048032bb08e39247ee99bf (diff) | |
download | FreeBSD-src-1ce8146dd9103f4dd0c4011cd2351aedea143f4a.zip FreeBSD-src-1ce8146dd9103f4dd0c4011cd2351aedea143f4a.tar.gz |
Having implemented read support for it, I now know how to document the
GNU sparse file extension.
Diffstat (limited to 'lib/libarchive/tar.5')
-rw-r--r-- | lib/libarchive/tar.5 | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/lib/libarchive/tar.5 b/lib/libarchive/tar.5 index 913f277..e8aaa37 100644 --- a/lib/libarchive/tar.5 +++ b/lib/libarchive/tar.5 @@ -604,11 +604,21 @@ On extraction, the list of fragments is collected from the header (including any extension headers), and the data is then read and written to the file at appropriate offsets. .It Va isextended -If this is set to non-zero, the header will be followed by -additional +If this is set to non-zero, the header will be followed by additional .Dq sparse header records. -Each such record contains XXX more details needed XXX +Each such record contains information about as many as 21 additional +sparse blocks as shown here: +.Bd -literal -offset indent +struct gnu_sparse_header { + struct { + char offset[12]; + char numbytes[12]; + } sparse[21]; + char isextended[1]; + char padding[7]; +}; +.Ed .It Va realsize A binary representation of the file's complete size, with a much larger range than the POSIX file size. |