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Close file pointer copy in the libtiff encoder if still open #6986

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merged 3 commits into from
Mar 5, 2023
Merged

Close file pointer copy in the libtiff encoder if still open #6986

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2299490
Close the file pointer copy (_fp) in the libtiff encoder if it is sti…
Mar 3, 2023
e953978
Added test
radarhere Mar 4, 2023
bf27074
Merge pull request #1 from radarhere/fix_libtiff_file_pointer
fcarron Mar 4, 2023
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6 changes: 6 additions & 0 deletions Tests/test_file_libtiff.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1065,3 +1065,9 @@ def test_save_zero(self, compression, tmp_path):
out = str(tmp_path / "temp.tif")
with pytest.raises(SystemError):
im.save(out, compression=compression)

def test_save_many_compressed(self, tmp_path):
im = hopper()
out = str(tmp_path / "temp.tif")
for _ in range(10000):
im.save(out, compression="jpeg")
5 changes: 5 additions & 0 deletions src/PIL/TiffImagePlugin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1850,6 +1850,11 @@ def _save(im, fp, filename):
fp.write(data)
if errcode:
break
if _fp:
try:
os.close(_fp)
except OSError:
pass
if errcode < 0:
msg = f"encoder error {errcode} when writing image file"
raise OSError(msg)
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