chroot: start removing unsafe

[oech3]

Some unsafes need more refactoring

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/date/date-locale-hour (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/cut/bounded-memory (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tail/tail-n0f (passes in this run but fails in the 'main' branch)
Note: The gnu test tests/seq/seq-epipe is now being skipped but was previously passing.
Congrats! The gnu test tests/basenc/bounded-memory is now passing!

[codspeed-hq]

Merging this PR will degrade performance by 23.82%

⚡ 1 improved benchmark
❌ 1 regressed benchmark
✅ 309 untouched benchmarks
⏩ 46 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	sort_ascii_utf8_locale	16.1 ms	15.4 ms	+4.88%
❌	Memory	cp_recursive_deep_tree[(120, 4)]	532.7 KB	699.2 KB	-23.82%

---

_{Comparing oech3:chroot-unsafe (72dd297) with main (ec72d08)}

Footnotes

1. 46 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[sylvestre]

@oech3 i wrote this graph to keep track this effort: https://github.com/uutils/coreutils-tracking/#unsafe-usage-evolution

[oech3]

Nice! It would be nice if we count unsafes in production code and unsafes in test code.

[sylvestre]

@oech3 done https://github.com/uutils/coreutils-tracking/#unsafe-usage-evolution

(are you on discord btw?)

[oech3]

I'm not on discord