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804a638ea3
Fixes critical issues found by Codex code review:
**1. Fixed file locking race condition (CRITICAL)**
- Lock file was being replaced by atomic rename, invalidating the lock
- New approach: lock a separate `.lock` file that persists across renames
- Ensures concurrent writers (installer + self-heal timer) are properly serialized
- Without this fix, corruption was still possible despite Phase 2
**2. Fixed validation to honor configured allowed_nodes_file path**
- validate command now uses loadConfig() to read actual config
- Respects allowed_nodes_file setting instead of assuming default path
- Prevents false positives/negatives when path is customized
**3. Allow empty allowed_nodes lists**
- Empty lists are valid (admin may clear for security, or rely on IPC validation)
- validate no longer fails on empty lists
- set-allowed-nodes --replace with zero nodes now supported
- Critical for operational flexibility
**4. Installer error propagation**
- update_allowed_nodes failures now exit installer with error
- Prevents silent failures that leave stale allowlists
- Self-heal will abort instead of masking CLI errors
**Technical Details:**
- withLockedFile() now locks `<path>.lock` instead of target file
- Lock held for entire duration of read-modify-write-rename
- atomicWriteFile() completes while lock is still held
- Empty lists represented as `allowed_nodes: []` in YAML
**Testing:**
✅ Lock file created and persists across operations
✅ Empty list can be written with --replace
✅ Validation passes with empty lists
✅ Config path from allowed_nodes_file honored
✅ Concurrent operations properly serialized
These fixes ensure Phase 2 actually eliminates corruption by design.
Identified by Codex code review
Related to Phase 2 commit
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| .. | ||
| hashpw | ||
| pulse | ||
| pulse-docker-agent | ||
| pulse-host-agent | ||
| pulse-sensor-proxy | ||