fix(util): constant type for Redox OS

[willnode]

What does this PR try to resolve?

This fixes compilation to Redox platform due to mode_t being i32. This patch has been used in Redox cargo fork downstream for years.

• mode_t and constants in libc
• downstream patch

How to test and review this PR?

cargo install --git https://gitlab.redox-os.org/redox-os/redoxer.git
redoxer pkg curl
redoxer build --release

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @epage (or someone else) some time within the next two weeks.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

• @rustbot author: the review is finished, PR author should check the comments and take action accordingly
• @rustbot review: the author is ready for a review, this PR will be queued again in the reviewer's queue

Why was this reviewer chosen?

The reviewer was selected based on:

• Owners of files modified in this PR: @ehuss, @epage, @weihanglo
• @ehuss, @epage, @weihanglo expanded to ehuss, epage, weihanglo
• Random selection from ehuss, epage, weihanglo

[weihanglo]

Thanks.

Could you bump a patch version for cargo-util crate and update hte workspace Cargo.lock?

View changes since this review

[weihanglo]

Thanks!

View changes since this review