From 3c4343672973c2d68cdfbfd47b39e667874c8bff Mon Sep 17 00:00:00 2001 From: jedarden Date: Thu, 25 Jun 2026 10:54:05 -0400 Subject: [PATCH] docs(bf-2w7): verify cleanup implementation is complete Verified that all cleanup mechanisms are properly implemented: - Orphan cleanup on startup (10-minute threshold) - CleanupGuard for automatic RAII cleanup - Global cleanup before process::exit() - Idempotent cleanup with retry logic All exit paths covered: - Normal exit (success/error) - Timeout exit - Signal interruption (SIGINT/SIGTERM) - Watchdog timeout - Panic - Early returns All tests passing. No orphaned temp directories found. Bead-Id: bf-2w7 --- notes/bf-2w7.md | 133 +++++++++++++++++++++++++++++++++++++----------- 1 file changed, 104 insertions(+), 29 deletions(-) diff --git a/notes/bf-2w7.md b/notes/bf-2w7.md index c5c43ad..3a4f34c 100644 --- a/notes/bf-2w7.md +++ b/notes/bf-2w7.md @@ -1,44 +1,119 @@ -# Bead bf-2w7: Cleanup Implementation +# Cleanup Implementation Verification (bf-2w7) -## Summary +## Task +Always tear down temp dir + stop.fifo on every exit path; sweep orphans on startup -Implemented comprehensive temp directory and named pipe cleanup on all exit paths. +## Implementation Status: COMPLETE -## Changes Made +All cleanup mechanisms were already properly implemented in the codebase. -### 1. Enhanced HookInstaller cleanup (src/hook.rs) +## Exit Paths Covered -- Added `cleanup_performed: Arc` flag to track cleanup state -- Made `cleanup()` method idempotent - can be called multiple times safely -- Enhanced cleanup to explicitly remove both FIFO and temp directory -- Added `Drop` implementation to ensure cleanup happens on all exit paths +### 1. Normal Exit (Success) +- **Location**: `main.rs:189` +- **Mechanism**: Calls `exit_with_cleanup(0)` → `cleanup_temp_dir()` +- **Coverage**: ✓ Cleanups before `process::exit(0)` -### 2. Exit Path Coverage +### 2. Normal Exit (Error) +- **Location**: Various paths in `main.rs` +- **Mechanism**: Calls `exit_with_cleanup(2-4)` → `cleanup_temp_dir()` +- **Coverage**: ✓ Cleanups before `process::exit()` -The implementation now handles cleanup on all exit paths: +### 3. Timeout Exit +- **Location**: `main.rs:211` +- **Mechanism**: Calls `exit_with_cleanup(124)` → `cleanup_temp_dir()` +- **Coverage**: ✓ Cleanups watchdog timeout exits -1. **Normal exit**: CleanupGuard drops → HookInstaller drops → cleanup() -2. **Error exit**: Same as normal (CleanupGuard runs on drop) -3. **Watchdog timeout**: Watchdog sets flag and returns Error → main calls exit_with_cleanup() -4. **SIGINT/SIGTERM**: Signal handlers write to self-pipe → EventLoop returns Interrupted → exit_with_cleanup() -5. **Panic**: Drop implementations run during stack unwinding -6. **Abort**: No destructors run, but cleanup_orphans() cleans up on next run +### 4. Signal Interruption (SIGINT/SIGTERM) +- **Location**: `main.rs:200` +- **Mechanism**: Calls `exit_with_cleanup(130)` → `cleanup_temp_dir()` +- **Coverage**: ✓ Cleanups after signal handling -### 3. Startup Orphan Cleanup (src/hook.rs) +### 5. Watchdog Timeout +- **Location**: `watchdog.rs:286-299` +- **Mechanism**: Watchdog kills child → returns `Error::Timeout` → `exit_with_cleanup()` +- **Coverage**: ✓ Ensures cleanup on watchdog timeout -- `cleanup_orphans()` is called at start of main() (main.rs:39) -- Sweeps temp dirs matching pattern `claude-print-*` older than 1 hour -- Prevents accumulation of stale temp dirs from crashed runs +### 6. Panic During Session +- **Location**: `session.rs:114` +- **Mechanism**: `catch_unwind` ensures `CleanupGuard::drop` runs +- **Coverage**: ✓ Cleanup even on panic -## Testing +### 7. Early Returns +- **Location**: Throughout `session.rs` +- **Mechanism**: `CleanupGuard` drops on early return +- **Coverage**: ✓ Cleanup on early exit paths -All 90 tests pass, including: -- `cleanup_can_be_called_multiple_times` - verifies idempotent cleanup -- `temp_dir_cleaned_up_on_drop` - verifies automatic cleanup -- `cleanup_orphans_does_not_panic` - verifies startup cleanup +## Cleanup Mechanisms + +### 1. Orphan Cleanup on Startup +- **Function**: `hook.rs:17` - `cleanup_orphans()` +- **Called from**: `main.rs:39` +- **Behavior**: + - Sweeps system temp directory for `claude-print-*` patterns + - Removes directories older than 10 minutes (600 seconds) + - Removes FIFO first, then entire directory +- **Coverage**: ✓ Prevents accumulation of orphans from crashes + +### 2. CleanupGuard (Drop-based cleanup) +- **Location**: `session.rs:43-49` +- **Behavior**: + - Calls `installer.cleanup()` on drop + - Covers all paths where guard goes out of scope + - Idempotent via atomic flag +- **Coverage**: ✓ Automatic cleanup via RAII + +### 3. Global Cleanup Before Exit +- **Function**: `session.rs:55` - `cleanup_temp_dir()` +- **Called from**: `main.rs:31` via `exit_with_cleanup()` +- **Behavior**: + - Removes FIFO first (may have different permissions) + - Removes entire temp directory with retry logic (3 attempts) + - Handles process::exit() bypassing destructors +- **Coverage**: ✓ Explicit cleanup before exit + +### 4. Idempotent Cleanup +- **Location**: `hook.rs:116-146` +- **Mechanism**: Atomic flag `cleanup_performed` +- **Behavior**: + - Prevents double-free with atomic swap + - Safe to call multiple times + - Explicit FIFO removal before directory + - Retry logic for transient failures (3 attempts) +- **Coverage**: ✓ Safe cleanup even if called multiple times ## Verification -- `cargo check` - compiles without errors -- `cargo test` - all 90 tests pass -- Cleanup is now robust against double-cleanup, panics, and early exit paths +### Tests Passing +- ✓ `cleanup_explicitly_removes_fifo` +- ✓ `cleanup_can_be_called_multiple_times` +- ✓ `cleanup_orphans_does_not_panic` +- ✓ `temp_dir_cleaned_up_on_drop` + +### No Orphaned Directories Found +```bash +$ ls -la /tmp/claude-print-* 2>/dev/null +(no output - all cleaned up) +``` + +## Architecture + +The cleanup strategy uses **defense in depth**: + +1. **Startup sweep**: Removes old orphans from previous crashes +2. **RAII guard**: Automatic cleanup via Drop trait +3. **Explicit cleanup**: Manual cleanup before process::exit() +4. **Idempotency**: Safe to call cleanup multiple times +5. **Retry logic**: Handles transient filesystem issues + +This ensures temp directories and FIFOs are removed on **all exit paths**: +- Normal exit (success) +- Normal exit (error) +- Timeout (watchdog) +- Signal interruption (SIGINT/SIGTERM) +- Panic +- Early returns + +## Conclusion + +The implementation is complete and verified. All exit paths properly tear down temporary resources, and orphan cleanup runs on startup to prevent accumulation from crashed runs.