What's New in the Linux Kernel... from Python
summary
Shows concrete, working examples: using Python's fcntl wrapper to call the kernel's fcreated_query (Linux 6.12) and get 1 or 0 for whether open with O_CREAT actually created the file, and using struct + ctypes to call the new binary proc maps API (proc_mmap_query, Linux 6.11), allocating a buffer, iterating VMAs, and decoding filenames. Notes needing a tiny C program to compute the ioctl constant and an alternate CFFI path; full code lives at github.com/jfft/pyon2025 and the second example runs (bugfixed on GitHub).
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chapters (5)
- 0:00Introduction
- 0:25File creation query
- 1:43Advanced memory querying
- 28:30Further exploration
- 30:12Q&A and concluding remarks
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