cargo locking doesn't work on Solaris

[psumbera]

Problem

As described in https://bugzilla.mozilla.org/show_bug.cgi?id=1802095#c5 cargo locking doesn't work on Solaris:

"normally, running cargo twice in the same workspace will make one of them wait for the other".

Can you please point me to relevant peace of code? Maybe it's related to missing flock() system call on Solaris?!

Steps

No response

Possible Solution(s)

No response

Notes

No response

Version

No response

[glandium]

Erf

cargo/src/cargo/util/flock.rs

Lines 396 to 400 in 5a7ba9c

	#[cfg(target_os = "solaris")]
	fn flock(file: &File, flag: libc::c_int) -> Result<()> {
	// Solaris lacks flock(), so simply succeed with a no-op
	Ok(())
	}

[glandium]

I guess you'd want something like https://www.perkin.org.uk/posts/solaris-portability-flock.html#flock-wrapper