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## Why Linux startup runs an advisory system `bwrap` warning probe on each launch. On hosts with NFS or autofs mounts, its `--ro-bind / /` probe can take tens of seconds before Codex prints anything, matching #19828. Because this probe only decides whether to surface a warning, it should not be allowed to stall startup. Relevant pre-change path: [`codex-rs/sandboxing/src/bwrap.rs`](https://github.com/openai/codex/blob/de2ccf94735a3d8a2a7077e6a5292026413867cf/codex-rs/sandboxing/src/bwrap.rs#L64-L80) ## What changed - Bound the advisory system `bwrap` probe to 500 ms. - Preserve the existing warning behavior when `bwrap` promptly reports a known user-namespace failure. - Kill and reap the probe child on timeout, then suppress the advisory warning instead of blocking startup. - Read probe stderr with a bounded nonblocking drain so descendants that inherit the pipe cannot extend startup after the probe child exits. - Add regression coverage for both a deliberately slow fake `bwrap` process and a fake probe whose descendant keeps stderr open. ## Security This only bounds the advisory startup probe. It does not change the command execution path or add a fail-open sandbox fallback. The related command-side hang in #20017 remains separate from this PR. ## Verification - Added `system_bwrap_probe_times_out_without_reporting_a_warning`. - Added `system_bwrap_probe_does_not_wait_for_descendants_holding_stderr_open`. - `cargo test -p codex-sandboxing` - `cargo clippy -p codex-sandboxing --all-targets -- -D warnings` Fixes #19828 Related: #20017
ed6082c9f9
·
2026-05-05 10:45:35 -07:00
6,168 Commits
npm i -g @openai/codex
or brew install --cask codex
Codex CLI is a coding agent from OpenAI that runs locally on your computer.
If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE.
If you want the desktop app experience, run
codex app or visit the Codex App page.
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex.
Quickstart
Installing and running Codex CLI
Install globally with your preferred package manager:
# Install using npm
npm install -g @openai/codex
# Install using Homebrew
brew install --cask codex
Then simply run codex to get started.
You can also go to the latest GitHub Release and download the appropriate binary for your platform.
Each GitHub Release contains many executables, but in practice, you likely want one of these:
- macOS
- Apple Silicon/arm64:
codex-aarch64-apple-darwin.tar.gz - x86_64 (older Mac hardware):
codex-x86_64-apple-darwin.tar.gz
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.
Using Codex with your ChatGPT plan
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Business, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.
You can also use Codex with an API key, but this requires additional setup.
Docs
This repository is licensed under the Apache-2.0 License.