write_to_png does not work on macOS and on Linux hardened systems #106
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liZe
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If this workaround works, we may use it everywhere ffi.callback is used. Related to #106.
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The fix in d7bb680 is not perfect, but it should at least make @codingcatgirl If you’re interested in testing this fix, let me know! I’ll use this workaround everywhere it’s possible. |
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I'm currently unable to test this, maybe @evilscientress can? |
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Sadly not. Back then grsecurity hardened kernels where still a thing. I don't have a system with kernel anymore with hardening of that kind. IIRC the problem was memory that was RWX mapped. grsec didn't allow such memory allocations. |
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Version 1.7.0 ............. Released on 2024-04-27 * Drop Python 3.7 support, add Python 3.12 support * `#221 <https://github.com/Kozea/cairocffi/pull/225>`_: Add environment variable to set folder where DLLs are installed on Windows * `#225 <https://github.com/Kozea/cairocffi/pull/225>`_: Use Ruff instead of Flake8 and isort Version 1.6.1 ............. Released on 2023-07-24 * `#217 <https://github.com/Kozea/cairocffi/issues/217>`_: Repair installation with PyInstaller Version 1.6.0 ............. Released on 2023-06-12 **This version uses a new CFFI mode that may break your program.** CairoCFFI now uses Flit for packaging and is also distributed as a Python wheel. Please test carefully and don’t hesitate to report issues before using it in production. * `#216 <https://github.com/Kozea/cairocffi/pull/216>`_: Use ABI-level in-line CFFI mode Version 1.5.1 ............. Released on 2023-04-15 * `#212 <https://github.com/Kozea/cairocffi/issues/212>`_: Bring back XCB support during wheel generation Version 1.5.0 ............. Released on 2023-03-17 * `#106 <https://github.com/Kozea/cairocffi/issues/106>`_, `#200 <https://github.com/Kozea/cairocffi/issues/200>`_: Fallback to manual PNG file creation on hardened systems * `#210 <https://github.com/Kozea/cairocffi/pull/210>`_: Use pyproject.toml for packaging and remove other useless files Version 1.4.0 ............. Released on 2022-09-23 * `#205 <https://github.com/Kozea/cairocffi/pull/205>`_: Use pikepdf to parse generated PDF * `#171 <https://github.com/Kozea/cairocffi/pull/171>`_: Don’t use deprecated pytest-runner anymore Version 1.3.0 ............. Released on 2021-10-04 * `2cd512d <https://github.com/Kozea/cairocffi/commit/2cd512d>`_: Drop Python 3.6 support * `#196 <https://github.com/Kozea/cairocffi/pull/196>`_: Fix import `constants.py` import * `#169 <https://github.com/Kozea/cairocffi/pull/169>`_: Add extra library name "cairo-2.dll" * `#178 <https://github.com/Kozea/cairocffi/pull/178>`_: Workaround for testing date string with cairo 1.17.4 * `#186 <https://github.com/Kozea/cairocffi/pull/186>`_: Fix link in documentation * `#195 <https://github.com/Kozea/cairocffi/pull/195>`_: Fix typo in documentation * `#184 <https://github.com/Kozea/cairocffi/pull/184>`_, `a4fc2a7 <https://github.com/Kozea/cairocffi/commit/a4fc2a7>`_: Clean .gitignore Version 1.2.0 ............. Released on 2020-10-29 * `#152 <https://github.com/Kozea/cairocffi/pull/152>`_: Add NumPy support * `#143 <https://github.com/Kozea/cairocffi/issues/143>`_: Make write_to_png function work on hardened systems * `#156 <https://github.com/Kozea/cairocffi/pull/156>`_: Use major version name to open shared libraries * `#165 <https://github.com/Kozea/cairocffi/pull/165>`_: Don’t list setuptools as required for installation Version 1.1.0 ............. Released on 2019-09-05 * `#135 <https://github.com/Kozea/cairocffi/pull/135>`_, `#127 <https://github.com/Kozea/cairocffi/pull/127>`_, `#119 <https://github.com/Kozea/cairocffi/pull/119>`_: Clean the way external libraries are found * `#126 <https://github.com/Kozea/cairocffi/pull/126>`_: Remove const char* elements from cdef * Support Cairo features up to 1.17.2 * Fix documentation generation Version 1.0.2 ............. Released on 2019-02-15 * `#123 <https://github.com/Kozea/cairocffi/issues/123>`_: Rely on a recent version of setuptools to handle VERSION Version 1.0.1 ............. Released on 2019-02-12 * `#120 <https://github.com/Kozea/cairocffi/issues/120>`_: Don't delete _generated modules on ffi_build import Version 1.0.0 ............. Released on 2019-02-08 6 years after its first release, cairocffi can now be considered as stable. * Drop Python 2.6, 2.7 and 3.4 support * Test with Python 3.7 * Clean code, tests and packaging
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Migrating cairocffi so it uses the faster cffi API mode and new-style callbacks would solve this problem. See also #105.
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