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fix(e2b): harden remote adapter boundaries

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Tianyi Cui
2026-07-28 18:31:37 +08:00
parent dc44f93c39
commit 3e343b4477
33 changed files with 939 additions and 146 deletions
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packages/e2b/subprocess-e2b/README.md
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@@ -6,8 +6,8 @@ E2B implementation of the [`@deepseek-ai/dsh-subprocess`](../../subprocess/subpr
## Behavior
- **Asynchronous remote start** — the synchronous seam returns a handle immediately while `Sandbox.commands.run(..., { background: true })` starts remotely. `pid` is `-1` until the SDK returns the command PID; `done`, stdin, termination, and `waitForExit()` wait for readiness internally.
- **Linux process groups** — a quoted wrapper starts each argv under `setsid --wait` and records its actual process-group id plus private status files beneath `ctx.e2b.runtimeRoot/processes`. The handle waits for that file instead of assuming the SDK command PID is the group id. Termination signals the negative recorded id with `SIGTERM`, waits the caller's `graceMs`, then escalates to `SIGKILL` and the SDK kill fallback. Service disposal terminates and joins every retained handle before the sandbox owner disposes.
- **Asynchronous remote start** — the synchronous seam returns a handle immediately while `Sandbox.commands.run(..., { background: true })` starts remotely. `pid` is `-1` until the wrapper publishes and the adapter validates its process-group id; `done`, stdin, termination, and `waitForExit()` wait for readiness internally.
- **Linux process groups** — a quoted wrapper starts each argv under `exec setsid --wait` and records its actual process-group id plus private status files beneath `ctx.e2b.runtimeRoot/processes`. The handle waits for that file instead of treating the SDK command PID as its published identity. Termination signals the negative recorded id with `SIGTERM`, waits the caller's `graceMs`, then escalates to `SIGKILL` and the SDK kill fallback. If publication fails, the SDK PID remains the provisional `exec setsid` group id; rollback kills and verifies that group before startup rejects. Service disposal terminates and joins every retained handle before the sandbox owner disposes.
- **Environment boundary** — the wrapper starts from the sandbox command environment, removes ambient `DSH_*` and credential-shaped (`*KEY*`, `*SECRET*`, `*TOKEN*`) names, then restores every `spec.env` entry as an explicit caller opt-in. Host ambient variables never enter the sandbox implicitly.
- **Stdio projection** — pipe mode forwards E2B callbacks into host Node streams; inherit mode forwards them to the harness process streams; collect mode retains a bounded host tail with offset reads. Optional complete spill files are written remotely and advertised only while within their cap. Batch and streaming stdin use the SDK handle.