feat: add optional securityContext for supervised services - #8
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Allow per-service runAsUser/runAsGroup and Linux capabilities, applied at spawn via pre_exec. Extend describe with live identity and config, plus -o json to dump the raw source-file service object. Disabled on Android builds. Co-authored-by: Cursor <cursoragent@cursor.com>
Cache resolved identities at config load so spawn/liveness skip NSS. Read /proc identity outside the runtimes lock. Fail closed on setgroups when dropping uid/gid; shrink bounding set (best-effort), set NO_NEW_PRIVS, and inject HOME/USER/LOGNAME. Reject securityContext on Android at validate; require runAsGroup for numeric uids without passwd. Unify the capability allowlist and document exclusive caps. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
securityContext(runAsUser,runAsGroup,capabilities) to service definitions; privilege drop + ambient caps applied at spawn inservice.rs/ newsecurity.rs(completely disabled on Android).microinit describewith live process identity (Running asfrom/proc) and configuredSecuritycontext; add-o jsonto dump the raw service object from its source drop-in/config file.SecurityContextin the Go SDK; document usage in operator guide, man pages, and example config.Test plan
cargo test --tests --lib(note:shutdown_wait_secs_stops_tracked_daemonis a pre-existing flake on this host)cargo clippy --all-targets -- -D warningsgo test ./...undergo/securityContext.runAsUser=nobodyand confirmdescribeshows matching uid/gidmicroinit describe -o json <name>prints valid JSON of the source object; path on stderr--no-default-featuresbuild still compiles (securityContext field absent)Made with Cursor