Tracking issue for process::parent_id

[sfackler]

Implemented in #46092

[SimonSapin]

This is pub fn parent_id() -> u32 (which is consistent with std::process::id and std::process::Child::id) in the Unix-only std::os::unix::process module.

Looks good to me to stabilize.

@rfcbot fcp merge

[rfcbot]

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

• @Kimundi
• @SimonSapin
• @alexcrichton
• @aturon
• @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.

[jethrogb]

For posterity, I've found two ways to get this information on Windows:

• Enumerate all processes https://www.codeproject.com/Articles/9893/Get-Parent-Process-PID
• Using undocumented behavior https://www.codeguru.com/cpp/w-p/win32/article.php/c1437/Retrieving-the-parent-of-a-process-WinNT.htm

I don't think either of these methods is acceptable to use in std, so a platform-specific API as is implemented now seems fine.

[rfcbot]

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

[rfcbot]

The final comment period is now complete.