Tracking issue for write_all_at/read_exact_at convenience methods

[drrlvn]

The Read and Write traits contain convenience methods read_exact and write_all wrapping read and write. This issue tracks addition of similar methods to std::os::unix::fs::FileExt trait's read_at and write_at.

This is implemented in #51809.

[fbstj]

if this is a tracking issue, maybe it should have the C-tracking-issue label

[tomaka]

We should eventually add similar methods to std::os::windows::fs::FileExt.

[drrlvn]

@tomaka I know nothing about developing on Windows so I can't do it myself but I guess a PR would be accepted.

@alexcrichton Can we stabilize this? Is there anything that still needs to be done?

[alexcrichton]

Seems reasonable to me!

@rfcbot fcp merge

[rfcbot]

Team member @alexcrichton has proposed to merge this. The next step is review by the rest of the tagged teams:

• @Kimundi
• @SimonSapin
• @alexcrichton
• @dtolnay
• @sfackler
• @withoutboats

No concerns currently listed.

Once a majority of reviewers approve (and none object), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

See this document for info about what commands tagged team members can give me.

[rfcbot]

🔔 This is now entering its final comment period, as per the review above. 🔔

[rfcbot]

The final comment period, with a disposition to merge, as per the review above, is now complete.