fix(cmux-tui): reject hostless terminal cwd - #11395
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Included review availability: Your plan provides up to 10 included reviews per hour; 3 remain after this review. 📝 WalkthroughWalkthroughThe change separates terminal, local, spawn, and snapshot CWD conversion. Hosted surfaces now use authenticated spawn-CWD snapshots. Process responses use the resolved local CWD. Snapshot encoding varies by protocol version. ChangesCWD validation and provenance
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: ⚪ Minimal · up to The cwd validation and snapshot provenance changes have no substantiated merge-blocking issue in the supplied evidence. Sequence Diagram(s)sequenceDiagram
participant TerminalHostRuntime
participant platform
participant Surface
participant ProcessResource
TerminalHostRuntime->>platform: Convert authenticated spawn CWD
platform-->>TerminalHostRuntime: Local path or None
TerminalHostRuntime->>TerminalHostRuntime: Encode protocol-specific snapshot CWD
Surface->>platform: Validate hosted snapshot CWD
platform-->>Surface: Local path or None
ProcessResource->>Surface: Read local_cwd()
Surface-->>ProcessResource: Local CWD string
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Actionable comments posted: 1
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Inline comments:
In `@cmux-tui/crates/cmux-tui-core/src/terminal_host_runtime.rs`:
- Around line 3363-3365: Update the CWD resolution flow around
spawn_cwd_to_local_path and Url::from_file_path so every rejected source emits a
diagnostic containing a sanitized source and rejection reason before returning
None. Preserve the existing fallback and snapshot behavior, and extend the
relevant snapshot test to assert the diagnostic.
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Inline comments:
In `@cmux-tui/crates/cmux-tui-core/src/surface.rs`:
- Line 2824: Update the diagnostic emitted near the untrusted terminal
working-directory handling to remove internal terms such as “terminal-host” and
“snapshot”; use user-facing product terminology like “invalid terminal working
directory” and include a safe recovery action if the message is shown to users.
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Summary
file://URLs with validated local hosts.Testing
git diff --check717f35768bbfc7a60c0a81ce9fe4b0c74fafd674: clean, overall correctness 0.88.Issues
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@codesmith-botwith what you need. Autofix is disabled.Summary by cubic
Rejects hostless OSC 7 terminal cwd paths so a remote PTY can't redirect a local spawn or leak through reattachment.
terminal_pwd_to_local_pathonly acceptsfile://URLs with a validated local host; exited hosted PTYs stay untrusted.local_terminal_pwd_to_local_path.spawn_cwd_to_local_path, which preserves plain absolute, relative, drive, and colon-containing paths exactly but rejects hostless file URLs.cmux-tui:spawn-cwd:v1:prefix; reattachment verifies the token with constant-time comparison, and legacy file-URL values still pass through the host check.terminal.process.getnow reports the sanitizedlocal_cwd()instead of the raw terminal pwd.Written for commit a7cde50. Summary will update on new commits.
Summary by CodeRabbit