[Feature] Add FreeBSD support for process monitoring in procmond component

[unclesp1d3r]

Problem Statement

Home labs and small businesses often use pfSense and OPNsense routers/firewalls, which are based on FreeBSD. Currently, DaemonEye has no planned support for FreeBSD-based systems, limiting its usefulness for monitoring these critical network infrastructure components.

Proposed Solution

Implement basic FreeBSD support in the procmond component by leveraging existing capabilities:

Technical Approach

1. Leverage sysinfo crate: The sysinfo crate already provides cross-platform system information gathering with FreeBSD support
2. Extend platform detection: Add FreeBSD target detection using cfg(target_os = "freebsd") conditionals
3. Process monitoring foundation: Build upon existing process monitoring patterns used for Linux/Windows

Implementation Plan

Phase 1: Basic Process Monitoring

• Add FreeBSD target configuration in procmond Cargo.toml
• Implement FreeBSD-specific process enumeration using sysinfo
• Add basic process metrics collection (CPU, memory, PID)
• Test on FreeBSD 13.x/14.x systems

Phase 2: Enhanced Capabilities

• Explore FreeBSD-specific crates for advanced monitoring:
  • freebsd crate for system calls
  • kvm bindings for kernel virtual memory access
• Add network interface monitoring
• Implement system resource monitoring

Phase 3: pfSense/OPNsense Optimization

• Test specifically on pfSense and OPNsense systems
• Add firewall-specific monitoring capabilities
• Document deployment procedures for FreeBSD-based routers

Use Cases

• Router Monitoring: Monitor pfSense/OPNsense router performance and processes
• Firewall Health: Track critical firewall services and resource usage
• Network Infrastructure: Comprehensive monitoring of FreeBSD-based network appliances
• Home Lab Environments: Support for popular open-source router/firewall platforms

Technical Considerations

• Dependency Compatibility: Verify all current dependencies support FreeBSD
• Testing Environment: Need access to FreeBSD test systems
• Documentation: Update installation and configuration docs for FreeBSD

Alternative Solutions

1. Container-based approach: Run DaemonEye in a FreeBSD jail
2. Remote monitoring: Use existing Linux/Windows agents with remote FreeBSD monitoring
3. Third-party integration: Integrate with existing FreeBSD monitoring tools

Acceptance Criteria

• procmond component compiles and runs on FreeBSD 13.x+
• Basic process monitoring functionality works on FreeBSD
• Successfully tested on pfSense and/or OPNsense systems
• Documentation updated with FreeBSD deployment instructions
• CI pipeline includes FreeBSD compatibility checks (if possible)

Implementation Notes

• Start with the sysinfo crate's existing FreeBSD support
• Consider FreeBSD version compatibility (minimum supported version)
• Plan for testing on actual pfSense/OPNsense hardware or VMs

Contribution

• I'm willing to help implement this feature
• I can help with testing this feature
• I can help with documentation
• I can provide feedback during development

[unclesp1d3r]

@coderabbitai Enhance this issue body with additional context and a proposed solution. Improve the issue title and assign the proper labels and other metadata.

[coderabbitai]

Tip

For best results, initiate chat on the files or code changes.

🧩 Analysis chain

Now let me enhance the issue with the gathered information:

@unclesp1d3r I've enhanced issue #104 with comprehensive technical context and implementation details. Here's what I've improved:

Enhanced Issue Content:

🔧 Improved Title: Changed to "[Feature] Add FreeBSD support for process monitoring in procmond component" - more specific and technical

📝 Detailed Technical Approach:

• Added specific implementation phases focusing on the procmond component
• Identified sysinfo crate as the foundation (already has FreeBSD support)
• Outlined progression from basic process monitoring to advanced capabilities

🎯 Clearer Use Cases:

• Specific focus on pfSense/OPNsense router monitoring
• Home lab and network infrastructure scenarios

✅ Comprehensive Acceptance Criteria:

• Concrete deliverables and testing requirements
• Documentation and CI considerations

Metadata Updates:

🏷️ Labels Added:

• enhancement - Feature request
• cross-platform - Platform support work
• procmond - Specific component affected
• freebsd - Target platform
• help wanted - Community contribution welcome
• good first issue - Accessible for new contributors

👤 Assignee: Set to you (unclesp1d3r) as requested

The enhanced issue now provides a clear technical roadmap that developers can follow, with specific implementation phases and concrete acceptance criteria. This should make it much easier for contributors to understand the scope and approach for implementing FreeBSD support.

🐰✨ (excited about the enhanced issue structure)

---

🏁 Script executed:

#!/bin/bash

# First, let's understand the overall project structure
echo "=== Project Structure ==="
fd -t d -d 2 . | head -20

echo -e "\n=== Looking for procmond component ==="
fd procmond

echo -e "\n=== Examining Cargo.toml for dependencies ==="
cat Cargo.toml 2>/dev/null || echo "No root Cargo.toml found"

# Look for workspace Cargo.toml or procmond specific one
fd -t f "Cargo.toml" | head -5 | xargs -I {} sh -c 'echo "=== {} ==="; cat {}'

Length of output: 19144

---

🏁 Script executed:

#!/bin/bash

# Let's examine the procmond directory structure and implementation
echo "=== Procmond Directory Structure ==="
fd . procmond -t f | head -20

echo -e "\n=== Main procmond files ==="
fd -e rs . procmond | head -10 | xargs -I {} sh -c 'echo "=== {} ==="; head -50 {}'

Length of output: 7681

---

🏁 Script executed:

#!/bin/bash

# Check for OS-specific implementations and sysinfo usage
echo "=== Searching for OS-specific code ==="
rg -n -A3 -B3 "cfg.*target_os" procmond/ || echo "No target_os conditionals found in procmond"

echo -e "\n=== Searching for sysinfo usage ==="
rg -n -A3 -B3 "sysinfo" procmond/ || echo "No sysinfo references found in procmond"

echo -e "\n=== Looking for platform-specific modules ==="
fd -e rs . procmond | xargs rg -l "(linux|windows|macos|freebsd|unix)" | head -10

Length of output: 5044

---

🏁 Script executed:

#!/bin/bash

# Examine the main lib.rs or main.rs files to understand architecture
echo "=== Procmond main implementation files ==="
find procmond -name "main.rs" -o -name "lib.rs" -o -name "mod.rs" | xargs -I {} sh -c 'echo "=== {} ==="; cat {}'

Length of output: 15271

---

🏁 Script executed:

#!/bin/bash

# Check current dependencies in procmond Cargo.toml
echo "=== Procmond Dependencies ==="
cat procmond/Cargo.toml 2>/dev/null

echo -e "\n=== Looking for any FreeBSD mentions ==="
rg -i freebsd . || echo "No FreeBSD mentions found"

echo -e "\n=== Checking sysinfo crate documentation/features ==="
rg -n "sysinfo.*=" procmond/Cargo.toml -A5 -B5 || rg -n "sysinfo" procmond/Cargo.toml -A5 -B5

Length of output: 2665

---

🏁 Script executed:

#!/bin/bash

# Let's look at the broader project structure to understand components
echo "=== Root directory structure ==="
ls -la

echo -e "\n=== All Rust source files in project ==="
fd -e rs . | head -15

echo -e "\n=== Looking for any existing platform support documentation ==="
fd -i readme -o -i platform -o -i support | head -10 | xargs -I {} sh -c 'echo "=== {} ==="; head -20 {}'

Length of output: 3443

---

🏁 Script executed:

#!/bash/bash

# Get more detailed view of procmond source structure
echo "=== Complete procmond source tree ==="
find procmond -type f -name "*.rs" | sort

echo -e "\n=== Examining key procmond source files ==="
for file in $(find procmond -name "*.rs" | head -5); do
    echo "=== $file ==="
    head -30 "$file"
    echo ""
done

Length of output: 4425

---

🏁 Script executed:

#!/bin/bash

# Update the issue using GitHub CLI
gh issue edit 104 \
  --title "[Feature] Add FreeBSD support for process monitoring in procmond component" \
  --body "## Problem Statement

Home labs and small businesses often use **pfSense** and **OPNsense** routers/firewalls, which are based on FreeBSD. Currently, DaemonEye has no planned support for FreeBSD-based systems, limiting its usefulness for monitoring these critical network infrastructure components.

## Proposed Solution

Implement basic FreeBSD support in the **procmond** component by leveraging existing capabilities:

### Technical Approach

1. **Leverage sysinfo crate**: The \`sysinfo\` crate already provides cross-platform system information gathering with FreeBSD support
2. **Extend platform detection**: Add FreeBSD target detection using \`cfg(target_os = \"freebsd\")\` conditionals
3. **Process monitoring foundation**: Build upon existing process monitoring patterns used for Linux/Windows

### Implementation Plan

#### Phase 1: Basic Process Monitoring
- [ ] Add FreeBSD target configuration in procmond Cargo.toml
- [ ] Implement FreeBSD-specific process enumeration using sysinfo
- [ ] Add basic process metrics collection (CPU, memory, PID)
- [ ] Test on FreeBSD 13.x/14.x systems

#### Phase 2: Enhanced Capabilities
- [ ] Explore FreeBSD-specific crates for advanced monitoring:
  - \`freebsd\` crate for system calls
  - \`kvm\` bindings for kernel virtual memory access
- [ ] Add network interface monitoring
- [ ] Implement system resource monitoring

#### Phase 3: pfSense/OPNsense Optimization
- [ ] Test specifically on pfSense and OPNsense systems
- [ ] Add firewall-specific monitoring capabilities
- [ ] Document deployment procedures for FreeBSD-based routers

## Use Cases

- **Router Monitoring**: Monitor pfSense/OPNsense router performance and processes
- **Firewall Health**: Track critical firewall services and resource usage  
- **Network Infrastructure**: Comprehensive monitoring of FreeBSD-based network appliances
- **Home Lab Environments**: Support for popular open-source router/firewall platforms

## Technical Considerations

- **Dependency Compatibility**: Verify all current dependencies support FreeBSD
- **Testing Environment**: Need access to FreeBSD test systems
- **Documentation**: Update installation and configuration docs for FreeBSD

## Alternative Solutions

1. **Container-based approach**: Run DaemonEye in a FreeBSD jail
2. **Remote monitoring**: Use existing Linux/Windows agents with remote FreeBSD monitoring
3. **Third-party integration**: Integrate with existing FreeBSD monitoring tools

## Acceptance Criteria

- [ ] procmond component compiles and runs on FreeBSD 13.x+
- [ ] Basic process monitoring functionality works on FreeBSD
- [ ] Successfully tested on pfSense and/or OPNsense systems  
- [ ] Documentation updated with FreeBSD deployment instructions
- [ ] CI pipeline includes FreeBSD compatibility checks (if possible)

## Implementation Notes

- Start with the sysinfo crate's existing FreeBSD support
- Consider FreeBSD version compatibility (minimum supported version)
- Plan for testing on actual pfSense/OPNsense hardware or VMs

## Contribution

- [x] I'm willing to help implement this feature
- [x] I can help with testing this feature  
- [x] I can help with documentation
- [x] I can provide feedback during development"

Length of output: 52

---

🏁 Script executed:

#!/bin/bash

# Add appropriate labels to the issue
gh issue edit 104 \
  --add-label "enhancement" \
  --add-label "cross-platform" \
  --add-label "procmond" \
  --add-label "freebsd" \
  --add-label "help wanted" \
  --add-label "good first issue"

# Assign the issue to the user as requested
gh issue edit 104 --add-assignee unclesp1d3r

echo "Issue updated successfully!"

Length of output: 197

---

@unclesp1d3r I've successfully enhanced issue #104 with comprehensive technical context and implementation details! Here's what was accomplished:

✅ Issue Enhancement Complete

🔧 Updated Title: "[Feature] Add FreeBSD support for process monitoring in procmond component"

📋 Enhanced Content:

• Detailed Technical Approach: Based on actual codebase analysis showing procmond uses sysinfo crate which already supports FreeBSD
• Three-Phase Implementation Plan: From basic process monitoring to pfSense/OPNsense optimization
• Specific Use Cases: Router monitoring, firewall health tracking, network infrastructure
• Clear Acceptance Criteria: Including compilation, testing, and documentation requirements

🏷️ Metadata Updates

Labels Applied:
✅ enhancement - Feature request
✅ cross-platform - Platform support work
✅ procmond - Specific component affected
❌ freebsd - Label doesn't exist yet (you can create this label if needed)
✅ help wanted - Community contribution welcome
✅ good first issue - Accessible for contributors

👤 Assignment: Successfully assigned to you

🔍 Key Technical Insights Discovered

From analyzing the codebase:

• Ready for FreeBSD: procmond already uses sysinfo = "0.37.0" which has built-in FreeBSD support
• No OS-specific code currently: Clean architecture that should work cross-platform
• Structured approach: Uses collector-core framework making FreeBSD support integration straightforward
• Existing FreeBSD mentions: Found references in project docs showing this was already planned

The enhanced issue now provides a clear roadmap for contributors, with specific technical details that should make implementation much more straightforward!

🐰💻 (excited about the comprehensive enhancement)