Michael Bolin
e88f74d140
## Why `codex-rs/core/src/tools/runtimes/shell/unix_escalation.rs` previously located `codex-execve-wrapper` by scanning `PATH` and sibling directories. That lookup is brittle and can select the wrong binary when the runtime environment differs from startup assumptions. We already pass `codex-linux-sandbox` from `codex-arg0`; `codex-execve-wrapper` should use the same startup-driven path plumbing. ## What changed - Introduced `Arg0DispatchPaths` in `codex-arg0` to carry both helper executable paths: - `codex_linux_sandbox_exe` - `main_execve_wrapper_exe` - Updated `arg0_dispatch_or_else()` to pass `Arg0DispatchPaths` to top-level binaries and preserve helper paths created in `prepend_path_entry_for_codex_aliases()`. - Threaded `Arg0DispatchPaths` through entrypoints in `cli`, `exec`, `tui`, `app-server`, and `mcp-server`. - Added `main_execve_wrapper_exe` to core configuration plumbing (`Config`, `ConfigOverrides`, and `SessionServices`). - Updated zsh-fork shell escalation to consume the configured `main_execve_wrapper_exe` and removed path-sniffing fallback logic. - Updated app-server config reload paths so reloaded configs keep the same startup-provided helper executable paths. ## References - [`Arg0DispatchPaths` definition](https://github.com/openai/codex/blob/e355b43d5c2a771f045296a6deae10d7c9c36ec6/codex-rs/arg0/src/lib.rs#L20-L24) - [`arg0_dispatch_or_else()` forwarding both paths](https://github.com/openai/codex/blob/e355b43d5c2a771f045296a6deae10d7c9c36ec6/codex-rs/arg0/src/lib.rs#L145-L176) - [zsh-fork escalation using configured wrapper path](https://github.com/openai/codex/blob/e355b43d5c2a771f045296a6deae10d7c9c36ec6/codex-rs/core/src/tools/runtimes/shell/unix_escalation.rs#L109-L150) ## Testing - `cargo check -p codex-arg0 -p codex-core -p codex-exec -p codex-tui -p codex-mcp-server -p codex-app-server` - `cargo test -p codex-arg0` - `cargo test -p codex-core tools::runtimes::shell::unix_escalation:: -- --nocapture`
codex-core
This crate implements the business logic for Codex. It is designed to be used by the various Codex UIs written in Rust.
Dependencies
Note that codex-core makes some assumptions about certain helper utilities being available in the environment. Currently, this support matrix is:
macOS
Expects /usr/bin/sandbox-exec to be present.
When using the workspace-write sandbox policy, the Seatbelt profile allows
writes under the configured writable roots while keeping .git (directory or
pointer file), the resolved gitdir: target, and .codex read-only.
Network access and filesystem read/write roots are controlled by
SandboxPolicy. Seatbelt consumes the resolved policy and enforces it.
Seatbelt also supports macOS permission-profile extensions layered on top of
SandboxPolicy:
- no extension profile provided:
keeps legacy default preferences read access (
user-preference-read). - extension profile provided with no
macos_preferencesgrant: does not add preferences access clauses. macos_preferences = "readonly": enables cfprefs read clauses anduser-preference-read.macos_preferences = "readwrite": includes readonly clauses plususer-preference-writeand cfprefs shm write clauses.macos_automation = true: enables broad Apple Events send permissions.macos_automation = ["com.apple.Notes", ...]: enables Apple Events send only to listed bundle IDs.macos_accessibility = true: enablescom.apple.axservermach lookup.macos_calendar = true: enablescom.apple.CalendarAgentmach lookup.
Linux
Expects the binary containing codex-core to run the equivalent of codex sandbox linux (legacy alias: codex debug landlock) when arg0 is codex-linux-sandbox. See the codex-arg0 crate for details.
All Platforms
Expects the binary containing codex-core to simulate the virtual apply_patch CLI when arg1 is --codex-run-as-apply-patch. See the codex-arg0 crate for details.