# First, let's locate the security.py file and understand the structure
find . -name "security.py" -type f | head -5

# Find test files related to security
find . -name "*test*.py" -o -name "test_*" -type f | grep -i security | head -10

# Search for the _extract_primary_command function and related code
rg -n "_extract_primary_command|extract_commands" --type=py | head -20

# Search for the bash_security_hook and understand the fail-safe mechanism
rg -n "bash_security_hook|ValueError.*shlex" --type=py -A 3 -B 3

# Read the security.py file to understand the fallback mechanism and the surrounding context
cat -n security.py | sed -n '143,220p'

# Look at the blocklist and how it's enforced
rg -n "HARDCODED_BLOCKLIST|BLOCKLIST|sudo|dd|shutdown" security.py -A 2 -B 2 | head -50

# Examine the test_extract_commands function to see what's tested
cat -n test_security.py | sed -n '97,150p'

# Search for tests with malformed/unclosed commands
rg -n "unclosed|malformed|shlex|ValueError" test_security.py -A 3 -B 2

# Check if there are any tests with chained commands and malformed input
rg -n "&&|;|pipe.*unclosed|malformed.*&&" test_security.py -A 5 -B 5

# See how the blocklist is enforced in bash_security_hook
cat -n security.py | sed -n '787,850p'

# Look at the full validate_command function to understand blocklist enforcement
rg -n "def validate_command|BLOCKED_COMMANDS|DANGEROUS_COMMANDS" security.py -A 5 | head -100

# Check if there are any tests with malformed input (unclosed quotes)
rg -n "unclosed|malformed|shlex.*fail|ValueError" test_security.py

# Look for tests that specifically test the fallback mechanism
rg -n "fallback|_extract_primary_command" test_security.py

# Search entire codebase for any tests with malformed commands containing chained operations
rg -n '".*&&.*".*unclosed|unclosed.*&&' test_security.py test_security_integration.py

# Let me check if there are any tests with malformed commands in general
rg -n 'unclosed|malformed|".*\\$' test_security.py test_security_integration.py -A 3 -B 1

# Check if the fallback extraction is tested with any dangerous commands
rg -n 'sudo|dd|shutdown' test_security.py -A 2 -B 2

# Let's trace through a specific test case with chained commands to understand the extraction
cat -n test_security.py | sed -n '1075,1130p'

# Check if there are any edge case tests with malformed input
rg -n "test.*malformed|test.*unclosed|test.*fallback" test_security.py -A 10

# Let me examine the complete extract_commands function to see all code paths
cat -n security.py | sed -n '182,280p'

# Let me check what the code did BEFORE the fallback was introduced
# by looking at git history to see the original behavior
git log --oneline -20 -- security.py

# Check if there are any tests that specifically test the behavior when extract_commands returns empty
rg -n "extract_commands.*\[\]|empty.*commands|extract.*fail" test_security.py -B 3 -A 3

# Let's create a test case to verify the concern - malformed input with chained dangerous commands
python3 << 'EOF'
import sys
sys.path.insert(0, '.')

from security import extract_commands, _extract_primary_command

# Test case 1: Malformed segment with chained dangerous command
test_cases = [
    # Normal cases
    ('docker exec php -r "echo test"', "normal docker with unclosed quote simulation"),
    # Malformed with chained command
    ('valid_cmd "unclosed && sudo rm -rf /', "chained dangerous after unclosed quote"),
    ('ls "unclosed && dd if=/dev/zero', "dd chained after unclosed quote"),
    ('echo "test && shutdown -h now', "shutdown chained after unclosed quote"),
]

print("Testing extract_commands with malformed + chained dangerous commands:\n")
for cmd, description in test_cases:
    result = extract_commands(cmd)
    print(f"Input: {cmd!r}")
    print(f"Description: {description}")
    print(f"Extracted commands: {result}")
    print()
EOF

# Check if the fallback was recently added or if it was always there
git log -p -- security.py | grep -A 10 -B 10 "_extract_primary_command" | head -50

# See when the fallback logic was introduced
git log --oneline --all | head -5

# Check what happens when extract_commands returns empty list in bash_security_hook
cat -n security.py | sed -n '808,820p'

# Let me test what happens with a pure malformed command (no valid first command)
python3 << 'EOF'
import sys
sys.path.insert(0, '.')

from security import extract_commands

# Test cases where malformed has NO valid command
test_cases = [
    ('&&& malformed', "operators only"),
    ('"unclosed only', "just unclosed quote"),
    ('; ; ;', "only operators"),
    ('|||', "only pipes"),
]

print("Testing extract_commands with ONLY malformed syntax:\n")
for cmd, description in test_cases:
    result = extract_commands(cmd)
    print(f"Input: {cmd!r}")
    print(f"Description: {description}")
    print(f"Extracted commands: {result}")
    print(f"Length: {len(result)}")
    print()
EOF

# Check the commit that introduced the fallback to understand the original behavior
git show d47028d --stat

# Let's see the actual changes made in that commit
git show d47028d

# Check what tests exist for malformed input and fallback
rg -n "test.*fallback|test.*malformed|test.*unclosed|test.*shlex" test_security.py -A 5 -B 2

# Verify that all BLOCKED_COMMANDS and DANGEROUS_COMMANDS are in the blocklist enforcement
cat -n security.py | sed -n '72,115p'

# Verify the blocklist is actually enforced in bash_security_hook
cat -n security.py | sed -n '834,860p'

# Test if a dangerous command can bypass when malformed
python3 << 'EOF'
import sys
sys.path.insert(0, '.')

from security import extract_commands, get_effective_commands

# Test if sudo/dd can bypass in malformed segments
malformed_tests = [
    'valid_cmd "unclosed && sudo apt install',
    'echo test; sudo rm -rf /',
    'ls "unclosed; dd if=/dev/zero',
]

dangerous_set = {"sudo", "dd", "shutdown", "reboot"}

print("Testing if dangerous commands extracted from malformed segments:\n")
for cmd in malformed_tests:
    extracted = extract_commands(cmd)
    has_dangerous = any(c in dangerous_set for c in extracted)
    print(f"Input: {cmd!r}")
    print(f"Extracted: {extracted}")
    print(f"Contains dangerous: {has_dangerous}")
    print()

# Check the blocklist
allowed, blocked = get_effective_commands(None)
print("Dangerous commands in blocklist:")
for cmd in ["sudo", "dd", "shutdown", "reboot", "su"]:
    in_blocked = cmd in blocked
    print(f"  {cmd}: {in_blocked}")
EOF

# Let me verify the actual security concern more thoroughly
# Test the specific example from the review comment
python3 << 'EOF'
import sys
sys.path.insert(0, '.')

import asyncio
from security import bash_security_hook

test_cases = [
    # The example from the review comment
    'docker exec php -r "unclosed && sudo rm -rf /',
    # Variations
    'valid_cmd "unclosed && sudo apt install package',
    'echo test; sudo rm -rf /',  # This should work (extracted)
    'ls "unclosed && shutdown -h now',
]

async def test_command(cmd):
    input_data = {"tool_name": "Bash", "tool_input": {"command": cmd}}
    result = await bash_security_hook(input_data)
    decision = result.get("decision", "allow")
    reason = result.get("reason", "allowed by default")
    return decision, reason

print("Testing bash_security_hook with malformed + dangerous commands:\n")
for cmd in test_cases:
    decision, reason = asyncio.run(test_command(cmd))
    print(f"Command: {cmd!r}")
    print(f"Decision: {decision}")
    if decision == "block":
        print(f"Reason: {reason[:100]}...")
    print()
EOF

# Check if there are any tests currently for the fallback behavior
grep -r "fallback\|_extract_primary_command" test_security.py test_security_integration.py

# Look for any TODO or FIXME comments about the fallback
rg -n "TODO|FIXME|XXX" security.py | head -20

# Let me trace through the logic more carefully for the docker case
python3 << 'EOF'
import sys
sys.path.insert(0, '.')

from security import extract_commands, is_command_allowed, get_effective_commands

# The critical case
cmd = 'docker exec php -r "unclosed && sudo rm -rf /'
print(f"Testing: {cmd!r}\n")

# Step 1: What gets extracted?
extracted = extract_commands(cmd)
print(f"Step 1 - Extracted commands: {extracted}")

# Step 2: Is docker allowed?
allowed, blocked = get_effective_commands(None)
docker_allowed = is_command_allowed("docker", allowed)
print(f"Step 2 - Is 'docker' allowed? {docker_allowed}")
print(f"         Docker in allowed: {'docker' in allowed}")
print(f"         Docker in blocked: {'docker' in blocked}")

# Step 3: Was sudo extracted?
sudo_extracted = "sudo" in extracted
print(f"Step 3 - Was 'sudo' extracted? {sudo_extracted}")
print(f"         Sudo in blocked: {'sudo' in blocked}")

print(f"\nResult: Command ALLOWED because docker is allowed and sudo was NOT extracted")
print(f"Risk: sudo is present in the command string but never validated")
EOF

# Check what's in the default allowlist for docker
rg -n "docker" security.py | head -20

# Verify the default allowed commands
cat -n security.py | sed -n '35,70p'