runproclike

runproclike is a lightweight command-line utility that analyzes a running process by its PID and prints the command and its environment in a reproducible form. It's especially useful for debugging, replicating process states, or migrating workloads.

Features

• Generates a detailed output of the process's environment, command line, and execution context.
• Inspired by the runlike tool, which focuses on reconstructing Docker commands. runproclike extends this concept to Linux processes.

Example

runproclike --pid 19352

sudo -i -u \#1000 <<EOF
  # change cwd user to match the target process
  cd /home/paulo/workspace/runproclike
  
  # export env variables to match the target process
  export WAYLAND_DISPLAY='wayland-0'
  export USER='paulo'
  export XDG_MENU_PREFIX='gnome-'
  export LANG='en_NZ.UTF-8'
  
  # cmdline to match the target process
  /bin/bash \
     --rcfile \
    /home/paulo/IDE/RustRover-2024.3.2/plugins/terminal/shell-integrations/bash/bash-integration.bash \
    -i
EOF

Installation

Using Cargo

export PATH=~/.cargo/bin/:$PATH
cargo install runproclike

Using Docker

Don't want to build and install anything? All good, you can leverage the docker image built precisely for that!

docker run \
  --rm \
  --privileged \
  --pid=host \
  ghcr.io/paulomigalmeida/runproclike:latest \
  --pid <pid>

Building from source

1. Clone the repository:

   git clone https://github.com/PauloMigAlmeida/runproclike.git
   cd runproclike
   

2. Build

   cargo build --release
   

Usage

runproclike [OPTIONS] --pid <PID>

Options:

Usage: runproclike [OPTIONS] --pid <PID>

Options:
  -p, --pid <PID>      PID of the process of interest
      --command-only   print the command line of the process without the path, cwd, env, etc.
      --omit-comments  Omit comments from the output.
  -h, --help           Print help
  -V, --version        Print version

How it Works

runproclike inspects a process's details by reading procfs files and outputs the information needed to recreate the process in a shell.

Contributing

Contributions are welcome! Please follow these steps:

• Fork the repository.
• Create a new branch for your feature/fix.
• Write tests ;)
• Submit a pull request.