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Gentoo on WSL: "Unable to unshare: EACCES"
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xlnagla
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Joined: 10 Jun 2012
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PostPosted: Tue Apr 30, 2019 12:50 am    Post subject: Gentoo on WSL: "Unable to unshare: EACCES" Reply with quote

Hi everyone,

After a recent world upgrade of a gentoo install on WSL, I've gotten into a state where I can't install anything at all.

My errors are:

Unable to unshare: EACCES
mount: /proc: not mount point or bad option.
Unable to mark /proc slave: 32

Based on this post and this post, I suspect that I have two problems. At least one of them is caused by the fact that WSL does not allow the proc filesystem to be mounted with the slave option enabled. What I'm wondering is

(1) does this reading seem correct, and how might I verify this is the problem?

(2) Why does portage require that /proc is marked slave, and is there any way to get around that requirement?

N.B. disabling the pid-sandbox and network-sandbox features does appear to work around this issue, but it seems like probably too heavyweight an answer.

~xlnagla
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nacitar
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Joined: 10 Jun 2011
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PostPosted: Thu May 30, 2019 12:55 am    Post subject: Reply with quote

On WSL, as you aren't running a linux kernel, you need this in make.conf

Code:
FEATURES="-ipc-sandbox -pid-sandbox -mount-sandbox -network-sandbox"


https://dev.gentoo.org/~zmedico/portage/doc/man/make.conf.5.html
Note the "Supported only on Linux" description next to the ones I've removed.

I don't think turning this off is too heavyweight really, given that those features won't work anyway.
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