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gh-136601: Always set TarInfo.size to the real file size for sparse files #136622

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gh-136601: Always set TarInfo.size to the real file size for sparse files #136622

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5 changes: 5 additions & 0 deletions Lib/tarfile.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1616,14 +1616,19 @@ def _apply_pax_info(self, pax_headers, encoding, errors):
"""Replace fields with supplemental information from a previous
pax extended or global header.
"""
real_size_updated = False
for keyword, value in pax_headers.items():
if keyword == "GNU.sparse.name":
setattr(self, "path", value)
elif keyword == "GNU.sparse.size":
setattr(self, "size", int(value))
real_size_updated = True
elif keyword == "GNU.sparse.realsize":
setattr(self, "size", int(value))
real_size_updated = True
elif keyword in PAX_FIELDS:
if keyword == "size" and real_size_updated:
continue
if keyword in PAX_NUMBER_FIELDS:
try:
value = PAX_NUMBER_FIELDS[keyword](value)
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2025-07-13-12-37-49.gh-issue-136601.ZBiMIN.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Always set ``TarInfo.size`` to the real file size for sparse files.
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