Cartesi WASM Term

Cartesi Machine booting a full interactive Linux OS with RISC-V architecture in the browser:

https://cartesi-machine.surge.sh/

This is using Cartesi Machine Emulator compiled to WebAssembly.

It boots the Cartesi Machine SDK original kernel and rootfs images.

Cool commands to try

Some interesting commands to try:

• python -c "print('hello')" - Run Python code.
• lua -e "print('hello')" - Run Lua code.
• bc - Use a calculator.
• python or lua - Code in Python or Lua interactively, can also be used as a calculator.
• vi test.py && python test.py - Code a Python program using vi text editor and then run it.
• sl - View animation of a train 🚂 .
• echo hello | sha256sum - Compute sha256 hash of a word.
• time dhrystone 500000 - Run integer benchmark.
• time whetstone 5000 - Run floating-point benchmark.
• hdparm -t /dev/mtdblock0 - Run disk read benchmark.
• uname -a - Check the Linux kernel and architecture information.
• dmesg - Check Linux boot logs.
• ps - Check running processes.
• top - Check running processes in real-time.
• mount - Check mounted filesystems.
• free -h - Check system memory.
• df -h - Check system disk usage.
• id - Check running user.
• ls -la / - Check the filesystem root directories.
• ascii - View the ASCII table.
• cat /etc/issue /etc/os-release - View Cartesi's rootfs release.
• ping -c 3 localhost; ifconfig -- Test internal networking.
• sqlite3 test.db -json "CREATE TABLE users(name text, age int); INSERT INTO users VALUES('John',42); SELECT * FROM users" | jq - Create a SQLite3 database and dump it as pretty JSON.
• history - View history of commands executed so far.
• poweroff -f - Halt the machine and view how many cycles were executed in total.

How it works?

The Cartesi Machine emulator library was compiled to WASM using Emscripten toolchain. Then a simple C program instantiates a new Linux machine and boots in interactive shell mode.

To have a terminal in the browser the following projects were used:

• https://github.com/mame/xterm-pty
• https://xtermjs.org