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Title: [3.10] bpo-45863: tarfile: don't zero out header fields unnecessarily (GH-29693) by miss-islington · Pull Request #31233 · python/cpython · GitHub

Open Graph Title: [3.10] bpo-45863: tarfile: don't zero out header fields unnecessarily (GH-29693) by miss-islington · Pull Request #31233 · python/cpython

X Title: [3.10] bpo-45863: tarfile: don't zero out header fields unnecessarily (GH-29693) by miss-islington · Pull Request #31233 · python/cpython

Description: Numeric fields of type float, notably mtime, can't be represented exactly in the ustar header, so the pax header is used. But it is helpful to set them to the nearest int (i.e. second rather than nanosecond precision mtimes) in the ustar header as well, for the benefit of unarchivers that don't understand the pax header. Add test for tarfile.TarInfo.create_pax_header to confirm correct behaviour. (cherry picked from commit bf2d44f) Co-authored-by: Joshua Root jmr@macports.org https://bugs.python.org/issue45863

Open Graph Description: Numeric fields of type float, notably mtime, can't be represented exactly in the ustar header, so the pax header is used. But it is helpful to set them to the nearest int (i.e. second rather th...

X Description: Numeric fields of type float, notably mtime, can't be represented exactly in the ustar header, so the pax header is used. But it is helpful to set them to the nearest int (i.e. second rathe...

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9b186e7 bpo-45863: tarfile: don't zero out header fields unnecessarily (GH-29… jmroot Feb 9, 2022 https://github.com/python/cpython/pull/31233/commits/9b186e78ac9d80333040e50574b804fb0a0493d4
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