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For dlsym(), a return value of NULL does not necessarily indicate an error [1]. Therefore, to avoid using stale (or NULL) dlerror() values, we must: 1. clear the previous error state by calling dlerror() 2. call dlsym() 3. call dlerror() If the return value of dlerror() is not NULL, an error occured. In ctypes we choose to treat a NULL return value from dlsym() as a "not found" error. This is the same as the fallback message we use on Windows, Cygwin or when getting/formatting the error reason fails. [1]: https://man7.org/linux/man-pages/man3/dlsym.3.html Signed-off-by: Georgios Alexopoulos <grgalex42@gmail.com> Signed-off-by: Georgios Alexopoulos <grgalex@ba.uoa.gr> Co-authored-by: Peter Bierma <zintensitydev@gmail.com> Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com> Co-authored-by: Petr Viktorin <encukou@gmail.com> |
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NEWS.d | ||
rhel7 | ||
ACKS | ||
externals.spdx.json | ||
HISTORY | ||
indent.pro | ||
platform_triplet.c | ||
Porting | ||
python-config.in | ||
python-config.sh.in | ||
python-embed.pc.in | ||
python.man | ||
python.pc.in | ||
README | ||
README.AIX | ||
README.valgrind | ||
sbom.spdx.json | ||
SpecialBuilds.txt | ||
stable_abi.toml | ||
svnmap.txt | ||
valgrind-python.supp | ||
vgrindefs |
Python Misc subdirectory ======================== This directory contains files that wouldn't fit in elsewhere. Some documents are only of historic importance. Files found here ---------------- ACKS Acknowledgements HISTORY News from previous releases -- oldest last indent.pro GNU indent profile approximating my C style NEWS News for this release (for some meaning of "this") Porting Mini-FAQ on porting to new platforms python-config.in Python script template for python-config python.man UNIX man page for the python interpreter python.pc.in Package configuration info template for pkg-config README The file you're reading now README.AIX Information about using Python on AIX README.valgrind Information for Valgrind users, see valgrind-python.supp SpecialBuilds.txt Describes extra symbols you can set for debug builds svnmap.txt Map of old SVN revs and branches to hg changeset ids, help history-digging valgrind-python.supp Valgrind suppression file, see README.valgrind vgrindefs Python configuration for vgrind (a generic pretty printer)