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unshare binfmt

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Rework how we handle binfmt_misc so it will work inside a user
namespace.

* Use a custom mountpoint (only accessible inside the mount namespace),
  this is the crux of the change, allowing us to mount it as non-root
  and avoid messing with any host configs too!
* No longer explicitly modprobe binfmt_misc, any modern system should
  probe it automatically when we try to mount it... I think so anyways
  heh

Signed-off-by: Casey Connolly <kcxt@postmarketos.org>
This commit is contained in:
Casey Connolly 2025-05-03 20:55:14 +02:00
parent c997ce83c2
commit be5e18cf99
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GPG key ID: 0583312B195F64B6
8 changed files with 60 additions and 76 deletions
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pmbootstrap.py
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@ -34,7 +34,9 @@ fsops = [
readonly=False,
required=True,
relative=False,
)
),
# Mount binfmt_misc at /tmp/pmb_binfmt_misc
sandbox.BinfmtOperation(pmb.config.binfmt_misc),
]
sandbox.setup_mounts(fsops)