Rollup of 12 pull requests#122229

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jhpratt wants to merge 33 commits intorust-lang:masterfrom

jhpratt:rollup-o2dscvq

Commits on Jul 11, 2022

Add Read Impl for &Stdin
Dajamante
committed

Commits on Feb 22, 2024

Add std::ffi::c_str modules
clarfonthey
committed

Commits on Feb 26, 2024

Commits on Mar 1, 2024

Commits on Mar 2, 2024

Commits on Mar 5, 2024

Implement MaybeUninit::fill{,_with,_from}
ajwock
committed

Commits on Mar 8, 2024

Commits on Mar 9, 2024