Pywayne Bin Cmdlogger

Execute a command and log all stdin, stdout, stderr to a file while forwarding I/O to console in real-time.

Quick Start

# Log command execution to default file (io_log.log in script directory)
cmdlogger <command> [args...]

# Specify custom log file path
cmdlogger --log-path <log_path> <command> [args...]

Usage Examples

Build Process Recording

# Log CMake configuration
cmdlogger --log-path cmake_config.log cmake ..

# Log build process
cmdlogger --log-path build.log make -j$(nproc)

Script Execution Monitoring

# Log Python script execution
cmdlogger --log-path script_run.log python3 my_script.py --arg1 value1

# Log shell script execution
cmdlogger --log-path deploy.log ./deploy.sh production

Debugging Sessions

# Log GDB debug session
cmdlogger --log-path debug_session.log gdb ./my_program

# Log Python interactive session
cmdlogger --log-path python_debug.log python3 -i my_module.py

Network Operations

# Log curl request with verbose output
cmdlogger --log-path api_test.log curl -v https://api.example.com/data

# Log SSH connection process
cmdlogger --log-path ssh_session.log ssh user@remote-host

Simple Command Logging

# Log git status
cmdlogger git status

# Log echo command
cmdlogger echo "Hello World"

Command Reference

| Argument | Description |

|----------|-------------|

| command | The command to execute |

| [args...] | Command arguments |

| --log-path | Optional log file path. Default: io_log.log in script directory |

Log Format

Each line in the log file is prefixed with stream type:

• 输入: - Standard input
• 输出: - Standard output
• 错误: - Standard error

Example Log Output

Running cmdlogger echo "Hello World" produces:

输出: Hello World

Running cmdlogger python3 -c "import sys; print('stdout'); print('stderr', file=sys.stderr)" produces:

输出: stdout
错误: stderr

Features

• Full I/O Recording: Captures all stdin, stdout, stderr
• Real-time Forwarding: Forwards I/O to console while logging
• Multi-threaded: Uses separate threads for stdin, stdout, stderr
• Encoding Handling: Gracefully handles non-UTF-8 data
• Resource Cleanup: Automatically cleans up processes and files

Use Cases

• Recording complex build processes for later analysis
• Monitoring long-running scripts with full logging
• Debugging with complete input/output history
• CI/CD pipeline execution logging
• Performance analysis with execution traces

Important Notes

• Interactive Commands: User input (including passwords) is logged. Be careful with sensitive information.
• Large Output: Log files can become large for commands with heavy output. Ensure sufficient disk space.
• Default Log Location: If --log-path is not specified, log file is created in the script directory as io_log.log.
• Exit Codes: Returns the exit code of the executed command (127 if command not found).