Sync fork with ultraworkers/claw-code:main - #9
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No behavior change. Move the inline probe out of unshare_user_namespace_works into a reusable unshare_probe helper and a cached working_unshare_mapping() that picks the first working candidate from UNSHARE_MAPPING_CANDIDATES, so the launcher and the capability probe share one code path.
…icted Plain `unshare --user --map-root-user` fails on kernels and containers that block unprivileged writes to /proc/self/uid_map (e.g. GitHub Actions, restricted AppArmor profiles). On those systems util-linux delegates to the setuid newuidmap/newgidmap helpers when --map-auto is also present. Add the combined form as a fallback candidate and build the launcher args from the probed mapping, so systems without newuidmap/newgidmap or a /etc/subuid range keep using the plain form.
… fallback The fallback candidate relies on the setuid newuidmap/newgidmap helpers (uidmap package) plus a subuid/subgid range for the current user. Note in the candidate docs that the startup probe rejects the candidate when those are missing, so the plain --map-root-user form is used instead.
The startup probe validated only the mapping flags against the trivial program `true`, but the real launcher always adds --mount --ipc --pid --uts --fork. On environments where the user namespace is created but mount propagation inside it is restricted (e.g. AppArmor-restricted CI runners), the fallback mapping passed the probe and the sandbox activated, yet every sandboxed command died with "cannot change root filesystem propagation: Permission denied", silently returning empty tool output and breaking the mock parity suite. The candidates now define the complete static launcher shape (mapping flags + namespace flags), so probe success implies launch success; the launcher reuses the candidate instead of re-appending the namespace flags, keeping probe and launch as one source of truth. The order-guarding test asserts the namespace flags are present in every candidate. Co-authored-by: linkst <2024023709@m.scnu.edu.cn>
…ap-auto-fallback fix(sandbox): fall back to --map-auto when root-user mapping is restricted
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👋 Sync ready for review @niStee — this PR syncs upstream changes into this fork. To merge:
Why manual approval? GitHub blocks any identity from approving its own PR (HTTP 422). The workflow can't auto-approve itself, so this is the standard Dependabot-style handoff pattern: workflow opens, you merge. |
niStee
approved these changes
Aug 6, 2026
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