OpenBSD: add getexecpath()

[brad0]

Description

add getexecpath() support for OpenBSD.

Sources

https://github.com/openbsd/src/blob/6f5c51ae477e3fbcceb5c62bf24ab89dede0d1c6/include/unistd.h

@rustbot label +stable-nominated

[rustbot]

Some changes occurred in an OpenBSD module

cc @semarie

Some changes occurred in a NetBSD-like module

cc @semarie

[tgross35]

Please include source links so I don't have to dig :) https://github.com/rust-lang/libc/blob/main/CONTRIBUTING.md#source-links

View changes since this review

[rustbot]

Reminder, once the PR becomes ready for a review, use @rustbot ready.

[brad0]

@rustbot ready

[tgross35]

Implementation looks fine to me but this seems brand new openbsd/src@6f5c51a so up to Sebastien whether to merge now or wait.

[brad0]

Implementation looks fine to me but this seems brand new openbsd/src@6f5c51a so up to Sebastien whether to merge now or wait.

Sure, I can wait either way.

[semarie]

I would prefer if we wait a bit, at least that base userland to active using it.
But it should be short time.

[tgross35]

One month perhaps?

@rustbot blocked
@SnoozeThis wait 1 month -> remove label S-blocked, add label S-waiting-on-review

[SnoozeThis]

(https://snoozeth.is/UPFZvnLl_oQ) I will wait until Sun, 04 Oct 2026 18:56:08 UTC and then add label S-waiting-on-review and remove label S-blocked.

@rustbot claim.

[semarie]

@tgross35 the function is now actively used in the base system (several programs, ld.so, etc...) so it is fine to land it to libc crate too.