Merge branch 'master' of ssh://github.com/engineer-man/piston

api/src/execute.js

@@ -1,48 +0,0 @@
-const { writeFile } = require('fs/promises');
-const { spawn } = require('child_process');
-
-async function execute(res, language, body) {
-    const stamp = new Date().getTime();
-    const sourceFile = `/tmp/${stamp}.code`;
-
-    await writeFile(sourceFile, body.source);
-
-    const process = spawn(__dirname + '/../../lxc/execute', [
-        language.name,
-        sourceFile,
-        body.args?.join('\n') ?? '',
-    ]);
-
-    const result = {
-        ran: true,
-        language: language.name,
-        stderr: '',
-        stdout: '',
-        output: '',
-    };
-
-    if (language.version)
-        result.version = language.version;
-
-    process.stderr.on('data', chunk => {
-        result.stderr += chunk;
-        result.output += chunk;
-    });
-
-    process.stdout.on('data', chunk => {
-        result.stdout += chunk;
-        result.output += chunk;
-    });
-
-    process.on('exit', () => {
-        result.stderr = result.stderr.trim().substring(0, 65535);
-        result.stdout = result.stdout.trim().substring(0, 65535);
-        result.output = result.output.trim().substring(0, 65535);
-
-        res.json(result);
-    });
-}
-
-module.exports = {
-    execute,
-};

api/src/index.js

@@ -1,5 +1,5 @@
 const express = require('express');
-const { execute } = require('./execute');
+const { execute } = require('../../shared/execute');
 const { languages } = require('./languages');
 const { checkSchema, validationResult } = require('express-validator');
 
@@ -20,7 +20,7 @@ app.post(
                 errorMessage: 'Supplied language is not a string',
             },
             custom: {
-                options: value => languages.find(language => language.aliases.includes(value?.toLowerCase())),
+                options: value => value && languages.find(language => language.aliases.includes(value.toLowerCase())),
                 errorMessage: 'Supplied language is not supported by Piston',
             },
         },
@@ -39,9 +39,16 @@ app.post(
             isArray: {
                 errorMessage: 'Supplied args is not an array',
             },
+        },
+        stdin: {
+            in: 'body',
+            optional: true,
+            isString: {
+                errorMessage: 'Supplied stdin is not a string',
+            },
         }
     }),
-    (req, res) => {
+    async (req, res) => {
         const errors = validationResult(req).array();
 
         if (errors.length === 0) {
@@ -49,7 +56,16 @@ app.post(
                 language.aliases.includes(req.body.language.toLowerCase())
             );
 
-            execute(res, language, req.body);
+            const { stdout, stderr, output, ran } = await execute(language, req.body.source, req.body.stdin, req.body.args);
+
+            res.status(200).json({
+                ran,
+                language: language.name,
+                version: language.version,
+                stdout,
+                stderr,
+                output,
+            });
         } else {
             res.status(400).json({
                 message: errors[0].msg,

api/src/languages.js

@@ -1,119 +1,5 @@
 const { spawn } = require('child_process');
-
-const languages = [
-    {
-        name: 'nasm',
-        aliases: ['asm', 'nasm'],
-    },
-    {
-        name: 'nasm64',
-        aliases: ['asm64', 'nasm64'],
-    },
-    {
-        name: 'awk',
-        aliases: ['awk'],
-    },
-    {
-        name: 'bash',
-        aliases: ['bash'],
-    },
-    {
-        name: 'brainfuck',
-        aliases: ['bf', 'brainfuck'],
-    },
-    {
-        name: 'c',
-        aliases: ['c'],
-    },
-    {
-        name: 'csharp',
-        aliases: ['c#', 'cs', 'csharp'],
-    },
-    {
-        name: 'cpp',
-        aliases: ['c++', 'cpp'],
-    },
-    {
-        name: 'deno',
-        aliases: ['deno', 'denojs', 'denots'],
-    },
-    {
-        name: 'ruby',
-        aliases: ['duby', 'rb', 'ruby'],
-    },
-    {
-        name: 'emacs',
-        aliases: ['el', 'elisp', 'emacs'],
-    },
-    {
-        name: 'elixir',
-        aliases: ['elixir'],
-    },
-    {
-        name: 'haskell',
-        aliases: ['haskell', 'hs'],
-    },
-    {
-        name: 'go',
-        aliases: ['go'],
-    },
-    {
-        name: 'java',
-        aliases: ['java'],
-    },
-    {
-        name: 'node',
-        aliases: ['javascript', 'js', 'node'],
-    },
-    {
-        name: 'jelly',
-        aliases: ['jelly'],
-    },
-    {
-        name: 'julia',
-        aliases: ['jl', 'julia'],
-    },
-    {
-        name: 'kotlin',
-        aliases: ['kotlin'],
-    },
-    {
-        name: 'lua',
-        aliases: ['lua'],
-    },
-    {
-        name: 'paradoc',
-        aliases: ['paradoc'],
-    },
-    {
-        name: 'perl',
-        aliases: ['perl'],
-    },
-    {
-        name: 'php',
-        aliases: ['php', 'php3', 'php4', 'php5'],
-    },
-    {
-        name: 'python3',
-        aliases: ['py', 'py3', 'python', 'python3'],
-    },
-    {
-        name: 'python2',
-        aliases: ['python2'],
-    },
-    {
-        name: 'rust',
-        aliases: ['rs', 'rust'],
-    },
-    {
-        name: 'swift',
-        aliases: ['swift'],
-    },
-    {
-        name: 'typescript',
-        aliases: ['ts', 'typescript'],
-    },
-];
+const languages = require('../../shared/languages.json');
 
 {
     const process = spawn(__dirname + '/../../lxc/versions');

cli/execute

@@ -0,0 +1,32 @@
+#!/usr/bin/env node
+
+const { execute } = require('../shared/execute');
+const { readFileSync } = require('fs');
+const languages = require('../shared/languages.json');
+
+const [languageName, sourceFile, ...args] = process.argv.slice(2);
+
+(async () => {
+    if (!languageName) {
+        console.error('Provide a language name');
+        return;
+    }
+    
+    if (!sourceFile) {
+        console.error('Provide a source file');
+        return;
+    }
+
+    const source = readFileSync(sourceFile).toString();
+
+    const language = languages.find(language => language.aliases.includes(languageName.toLowerCase()));
+
+    if (!language) {
+        console.error(`${languageName} is not supported by Piston`);
+        return;
+    }
+
+    const { output } = await execute(language, source, '', args);
+
+    console.log(output);
+})();

lxc/execute

@@ -14,13 +14,15 @@ epoch=$(date +%s%N)
 basepath="/var/lib/lxc/piston/rootfs"
 filepath="/tmp/$epoch/code.code"
 argpath="/tmp/$epoch/args.args"
+stdinpath="/tmp/$epoch/stdin.stdin"
 arg=$(basename $argpath)
 
 # write arg file
 mkdir -p $basepath/tmp/$epoch
 chmod 777 $basepath/tmp/$epoch
 cat $2 > $basepath$filepath
-echo "${@:3}" > $basepath$argpath
+echo $3 > $basepath$stdinpath
+echo "${@:4}" > $basepath$argpath
 
 # process incrementor
 exec 200>$dir/lockfile
@@ -39,17 +41,21 @@ exec 200>&-
 # runner
 timeout -s KILL 20 \
     lxc-attach --clear-env -n piston -- \
-        /bin/bash -l -c "bash /exec/$lang $newinc $epoch"
+        /bin/bash -l -c "runuser runner$newinc /exec/$lang $newinc $epoch"
 
 # process janitor
 lxc-attach --clear-env -n piston -- \
-    /bin/bash -l -c "\
-        for i in {1..100}; do pkill -u runner$newinc --signal SIGKILL; done ;\
-        find /tmp -user runner$newinc -exec /bin/rm -rf {} \; ;\
-        find /var/tmp -user runner$newinc -exec /bin/rm -rf {} \; ;\
-        find /var/lock -user runner$newinc -exec /bin/rm -rf {} \; ;\
-        find /dev/shm -user runner$newinc -exec /bin/rm -rf {} \; ;\
-        find /run/lock -user runner$newinc -exec /bin/rm -rf {} \; ;\
+    /bin/bash -l -c "
+        for i in {1..100}
+        do
+            pkill -u runner$newinc --signal SIGKILL
+        done
+
+        find /tmp -user runner$newinc -delete
+        find /var/tmp -user runner$newinc -delete
+        find /var/lock -user runner$newinc -delete
+        find /dev/shm -user runner$newinc -delete
+        find /run/lock -user runner$newinc -delete
     " > /dev/null 2>&1 &
 
 rm -rf $basepath/tmp/$epoch

lxc/executors/awk

@@ -1,4 +1,6 @@
+#!/bin/bash
+
 cd /tmp/$2
 timeout -s KILL 2 sed "/___code___/Q" code.code > code.stdin
 timeout -s KILL 2 sed "1,/___code___/d" code.code > code.awk
-runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 awk -f code.awk < code.stdin"
+timeout -s KILL 3 awk -f code.awk < code.stdin

lxc/executors/bash

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 bash code.code"
+xargs -a args.args -d '\n' timeout -s KILL 3 bash code.code < stdin.stdin

lxc/executors/brainfuck

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 brainfuck code.code"
+timeout -s KILL 3 xargs -a args.args -d '\n' brainfuck code.code < stdin.stdin

lxc/executors/c

@@ -1,4 +1,5 @@
-runuser runner$1 -c "\
-    cd /tmp/$2 ; \
-    gcc -std=c11 -o binary -x c code.code ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+#!/usr/bin/bash
+
+cd /tmp/$2
+gcc -std=c11 -o binary -x c code.code
+timeout -s KILL 3 xargs -a args.args ./binary < stdin.stdin

lxc/executors/cpp

@@ -1,4 +1,5 @@
-runuser runner$1 -c "\
-    cd /tmp/$2 ; \
-    g++ -std=c++17 -o binary -x c++ code.code ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+#!/bin/bash
+
+cd /tmp/$2
+g++ -std=c++17 -o binary -x c++ code.code
+timeout -s KILL 3 xargs -a args.args -d '\n' ./binary < stdin.stdin

lxc/executors/csharp

@@ -1,4 +1,5 @@
-runuser runner$1 -c "\
-    cd /tmp/$2 ; \
-    mcs $(echo code.code | sed 's/\///') -nowarn:0219 -out:binary ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 mono binary"
+#!/bin/bash
+
+cd /tmp/$2
+mcs $(echo code.code | sed 's/\///') -nowarn:0219 -out:binary
+timeout -s KILL 3 xargs -a args.args -d '\n' mono binary < stdin.stdin

lxc/executors/deno

@@ -1,7 +1,4 @@
-cd /tmp/$2
+#!/bin/bash
 
-if [[ -z $(grep '[^[:space:]]' args.args) ]]; then
-    runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 deno run code.code"
-else
-    runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 deno run code.code"
-fi
+cd /tmp/$2
+timeout -s KILL 3 xargs -a args.args -d '\n' deno run code.code < stdin.stdin

lxc/executors/elixir

@@ -1,7 +1,4 @@
-cd /tmp/$2
+#!/bin/bash
 
-if [[ -z $(grep '[^[:space:]]' args.args) ]]; then
-    runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 elixir code.code"
-else
-    runuser runner$1 -c "cd /tmp/$2 ; cat args.args ; xargs -d '\n' timeout -s KILL 3 elixir code.code"
-fi
+cd /tmp/$2
+timeout -s KILL 3 xargs -a args.args -d '\n' elixir code.code < stdin.stdin

lxc/executors/emacs

@@ -1,7 +1,4 @@
-cd /tmp/$2
+#!/bin/bash
 
-if [[ -z $(grep '[^[:space:]]' args.args) ]]; then
-    runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 emacs -Q --script code.code"
-else
-    runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 emacs -Q --script code.code"
-fi
+cd /tmp/$2
+timeout -s KILL 3 xargs -a args.args -d '\n' emacs -Q --script code.code < stdin.stdin

lxc/executors/go

@@ -1,6 +1,6 @@
+#!/bin/bash
+
 cd /tmp/$2
 cp code.code interim.go
-file="interim.go"
-go build $file
-file=${file%%.*}
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 ./$file"
+go build interim.go
+timeout -s KILL 3 xargs -a args.args -d '\n' ./interim < stdin.stdin

lxc/executors/haskell

@@ -1,7 +1,6 @@
-cd /tmp/$2
-mv code.code code.hs
+#!/bin/bash
 
-runuser runner$1 -c "\
-    cd /tmp/$2 ; \
-    ghc -dynamic -o binary code.hs > /dev/null 2>&1 ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+cd /tmp/$2
+cp code.code code.hs
+ghc -dynamic -o binary code.hs > /dev/null 2>&1
+timeout -s KILL 3 xargs -a args.args -d '\n' ./binary < stdin.stdin

lxc/executors/java

@@ -1,9 +1,7 @@
-cd /tmp/$2
-cp code.code interim.java
-name=$(grep -Po "(?<=\n|\A)\s*(public\s+)?(class|interface)\s+\K([^\/\\\\\n\s{]+)" interim.java)
-mv interim.java $name.java
+#!/bin/bash
 
-runuser runner$1 -c "\
-    cd /tmp/$2 ; \
-    javac $name.java ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 java $name"
+cd /tmp/$2
+name=$(grep -Po "(?<=\n|\A)\s*(public\s+)?(class|interface)\s+\K([^\/\\\\\n\s{]+)" code.code)
+cp code.code $name.java
+javac $name.java
+timeout -s KILL 3 xargs -a args.args -d '\n' java $name < stdin.stdin

lxc/executors/jelly

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 jelly fu code.code"
+timeout -s KILL 3 xargs -a args.args -d '\n' jelly fu code.code < stdin.stdin

lxc/executors/julia

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 julia code.code"
+timeout -s KILL 3 xargs -a args.args -d '\n' julia code.code < stdin.stdin

lxc/executors/kotlin

@@ -1,6 +1,6 @@
+#!/bin/bash
+
 cd /tmp/$2
 cp code.code code.kt
-runuser runner$1 -c "\
-    cd /tmp/$2 ; \
-    kotlinc code.kt -include-runtime -d code.jar ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 java -jar code.jar"
+kotlinc code.kt -include-runtime -d code.jar
+timeout -s KILL 3 xargs -a args.args -d '\n' java -jar code.jar < stdin.stdin

lxc/executors/lua

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 lua code.code"
+timeout -s KILL 3 xargs -a args.args -d '\n' lua code.code < stdin.stdin

lxc/executors/nasm

@@ -1,5 +1,6 @@
-runuser runner$1 -c "\
-    cd /tmp/$2 ; \
-    nasm -f elf32 -o binary.o code.code ; \
-    ld -m elf_i386 binary.o -o binary ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+#!/bin/bash
+
+cd /tmp/$2
+nasm -f elf32 -o binary.o code.code
+ld -m elf_i386 binary.o -o binary
+timeout -s KILL 3 xargs -a args.args -d '\n' ./binary < stdin.stdin

lxc/executors/nasm64

@@ -1,5 +1,6 @@
-runuser runner$1 -c "\
-    cd /tmp/$2 ; \
-    nasm -f elf64 -o binary.o code.code ; \
-    ld -m elf_x86_64 binary.o -o binary ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+#!/bin/bash
+
+cd /tmp/$2
+nasm -f elf64 -o binary.o code.code
+ld -m elf_x86_64 binary.o -o binary
+timeout -s KILL 3 xargs -a args.args -d '\n' ./binary < stdin.stdin

lxc/executors/node

@@ -1,7 +1,4 @@
-cd /tmp/$2
+#!/bin/bash
 
-if [[ -z $(grep '[^[:space:]]' args.args) ]]; then
-    runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 node code.code"
-else
-    runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 node code.code"
-fi
+cd /tmp/$2
+timeout -s KILL 3 xargs -a args.args -d '\n' node code.code < stdin.stdin

lxc/executors/paradoc

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; timeout -s KILL 3 python3 -m paradoc code.code <<< args.args"
+timeout -s KILL 3 python3 -m paradoc code.code < args.args

lxc/executors/perl

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 perl code.code"
+timeout -s KILL 3 xargs -a args.args -d '\n' perl code.code < stdin.stdin

lxc/executors/php

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 php code.code"
+timeout -s KILL 3 xargs -a args.args -d '\n' php code.code < stdin.stdin

lxc/executors/python2

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 python code.code"
+timeout -s KILL 3 xargs -a args.args -d '\n' python code.code < stdin.stdin

lxc/executors/python3

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 python3.8 code.code"
+timeout -s KILL 3 xargs -a args.args -d '\n' python3.8 code.code < stdin.stdin

lxc/executors/ruby

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 ruby code.code"
+timeout -s KILL 3 xargs -a args.args -d '\n' ruby code.code < stdin.stdin

lxc/executors/rust

@@ -1,5 +1,5 @@
+#!/bin/bash
+
 cd /tmp/$2
 rustc -o binary code.code
-runuser runner$1 -c "\
-    cd /tmp/$2 ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary"
+timeout -s KILL 3 xargs -a args.args -d '\n' ./binary < stdin.stdin

lxc/executors/swift

@@ -1,2 +1,4 @@
+#!/bin/bash
+
 cd /tmp/$2
-runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 swift code.code"
+timeout -s KILL 3 xargs -a args.args -d '\n' swift code.code < stdin.stdin

lxc/executors/typescript

@@ -1,7 +1,8 @@
-runuser runner$1 -c "\
-    cd /tmp/$2 ; \
-    mv code.code interim.ts ; \
-    tsc interim.ts ; \
-    rm -f interim.ts ; \
-    mv interim.js code.code ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 node code.code"
+#!/bin/bash
+
+cd /tmp/$2
+mv code.code interim.ts
+tsc interim.ts
+rm -f interim.ts
+mv interim.js code.code
+timeout -s KILL 3 xargs -a args.args -d '\n' node code.code < stdin.stdin

lxc/start

@@ -3,7 +3,7 @@
 mkdir -p /var/lib/lxc/piston/rootfs/exec
 rm -f /var/lib/lxc/piston/rootfs/exec/*
 cp -f executors/* /var/lib/lxc/piston/rootfs/exec
-chmod 700 /var/lib/lxc/piston/rootfs/exec/*
+chmod 555 /var/lib/lxc/piston/rootfs/exec/*
 chown -R root:root /var/lib/lxc/piston/rootfs/exec
 
 lxc-start -n piston -d

lxc/test_all_lxc

@@ -2,54 +2,54 @@
 cd tests
 
 echo 'testing awk'
-../execute awk test.awk
+../../cli/execute awk test.awk
 echo 'testing c'
-../execute c test.c
+../../cli/execute c test.c
 echo 'testing cpp'
-../execute cpp test.cpp
+../../cli/execute cpp test.cpp
 echo 'testing cs'
-../execute cs test.cs
+../../cli/execute cs test.cs
 echo 'testing deno'
-../execute deno testdeno.ts
+../../cli/execute deno testdeno.ts
 echo 'testing elisp'
-../execute elisp test.el
+../../cli/execute elisp test.el
 echo 'testing elixir'
-../execute exs test.exs
+../../cli/execute exs test.exs
 echo 'testing go'
-../execute go test.go
+../../cli/execute go test.go
 echo 'testing haskell'
-../execute haskell test.hs
+../../cli/execute haskell test.hs
 echo 'testing java'
-../execute java test.java
+../../cli/execute java test.java
 echo 'testing jelly'
-../execute jelly test.jelly
+../../cli/execute jelly test.jelly
 echo 'testing jl'
-../execute jl test.jl
+../../cli/execute jl test.jl
 echo 'testing js'
-../execute js test.js
+../../cli/execute js test.js
 echo 'testing kotlin'
-../execute kotlin test.kt
+../../cli/execute kotlin test.kt
 echo 'testing asm 32 bit'
-../execute asm test.nasm
+../../cli/execute asm test.nasm
 echo 'testing asm 64 bit'
-../execute asm64 test64.nasm
+../../cli/execute asm64 test64.nasm
 echo 'testing php'
-../execute php test.php
+../../cli/execute php test.php
 echo 'testing perl'
-../execute perl test.pl
+../../cli/execute perl test.pl
 echo 'testing ruby'
-../execute ruby test.rb
+../../cli/execute ruby test.rb
 echo 'testing rust'
-../execute rust test.rs
+../../cli/execute rust test.rs
 echo 'testing bash'
-../execute bash test.sh
+../../cli/execute bash test.sh
 echo 'testing swift'
-../execute swift test.swift
+../../cli/execute swift test.swift
 echo 'testing typescript'
-../execute typescript test.ts
+../../cli/execute typescript test.ts
 echo 'testing python2'
-../execute python2 test2.py
+../../cli/execute python2 test2.py
 echo 'testing python3'
-../execute python3 test3.py
+../../cli/execute python3 test3.py
 echo 'testing paradoc'
-../execute python3 test_paradoc.py
+../../cli/execute python3 test_paradoc.py

readme.md

@@ -148,6 +148,8 @@ cd piston/lxc
 - See `var/install.txt` for how to create a new LXC container and install all of the required
 software.
 
+#### CLI Usage
+- `cli/execute [language] [file path] [args]`
 <br>
 
 # Usage
@@ -185,14 +187,17 @@ Content-Type: application/json
 [
     {
         "name": "awk",
+        "aliases": ["awk"],
         "version": "1.3.3"
     },
     {
         "name": "bash",
+        "aliases": ["bash"],
         "version": "4.4.20"
     },
     {
         "name": "c",
+        "aliases": ["c"],
         "version": "7.5.0"
     }
 ]
@@ -236,8 +241,7 @@ HTTP/1.1 400 Bad Request
 Content-Type: application/json
 
 {
-    "code": "unsupported_language",
-    "message": "whatever is not supported by Piston"
+    "message": "Provided language is not supported by Piston"
 }
 ```
 

shared/execute.js

@@ -0,0 +1,49 @@
+const { writeFileSync } = require('fs');
+const { spawn } = require('child_process');
+
+function execute(language, source, stdin = '', args = []) {
+    return new Promise(resolve => {
+        const stamp = new Date().getTime();
+        const sourceFile = `/tmp/${stamp}.code`;
+
+        writeFileSync(sourceFile, source);
+
+        const process = spawn(__dirname + '/../lxc/execute', [
+            language.name,
+            sourceFile,
+            stdin,
+            args.join('\n'),
+        ]);
+
+        let stdout = '';
+        let stderr = '';
+        let output = '';
+
+        process.stderr.on('data', chunk => {
+            stderr += chunk;
+            output += chunk;
+        });
+
+        process.stdout.on('data', chunk => {
+            stdout += chunk;
+            output += chunk;
+        });
+        
+        process.on('exit', code => {
+            stderr = stderr.trim().substring(0, 65535);
+            stdout = stdout.trim().substring(0, 65535);
+            output = output.trim().substring(0, 65535);
+
+            resolve({
+                stdout,
+                stderr,
+                output,
+                ran: code === 0,
+            });
+        });
+    });
+}
+
+module.exports = {
+    execute,
+};

shared/languages.json

@@ -0,0 +1,202 @@
+[
+    {
+        "name": "nasm",
+        "aliases": [
+            "asm",
+            "nasm"
+        ]
+    },
+    {
+        "name": "nasm64",
+        "aliases": [
+            "asm64",
+            "nasm64"
+        ]
+    },
+    {
+        "name": "awk",
+        "aliases": [
+            "awk"
+        ]
+    },
+    {
+        "name": "bash",
+        "aliases": [
+            "bash"
+        ]
+    },
+    {
+        "name": "brainfuck",
+        "aliases": [
+            "bf",
+            "brainfuck"
+        ]
+    },
+    {
+        "name": "c",
+        "aliases": [
+            "c"
+        ]
+    },
+    {
+        "name": "csharp",
+        "aliases": [
+            "c#",
+            "cs",
+            "csharp"
+        ]
+    },
+    {
+        "name": "cpp",
+        "aliases": [
+            "c++",
+            "cpp",
+            "cc",
+            "cxx"
+        ]
+    },
+    {
+        "name": "deno",
+        "aliases": [
+            "deno",
+            "denojs",
+            "denots"
+        ]
+    },
+    {
+        "name": "ruby",
+        "aliases": [
+            "duby",
+            "rb",
+            "ruby"
+        ]
+    },
+    {
+        "name": "emacs",
+        "aliases": [
+            "el",
+            "elisp",
+            "emacs"
+        ]
+    },
+    {
+        "name": "elixir",
+        "aliases": [
+            "elixir",
+            "exs"
+        ]
+    },
+    {
+        "name": "haskell",
+        "aliases": [
+            "haskell",
+            "hs"
+        ]
+    },
+    {
+        "name": "go",
+        "aliases": [
+            "go",
+            "golang"
+        ]
+    },
+    {
+        "name": "java",
+        "aliases": [
+            "java"
+        ]
+    },
+    {
+        "name": "node",
+        "aliases": [
+            "javascript",
+            "js",
+            "node",
+            "node.js"
+        ]
+    },
+    {
+        "name": "jelly",
+        "aliases": [
+            "jelly"
+        ]
+    },
+    {
+        "name": "julia",
+        "aliases": [
+            "jl",
+            "julia"
+        ]
+    },
+    {
+        "name": "kotlin",
+        "aliases": [
+            "kotlin",
+            "kt"
+        ]
+    },
+    {
+        "name": "lua",
+        "aliases": [
+            "lua"
+        ]
+    },
+    {
+        "name": "paradoc",
+        "aliases": [
+            "paradoc"
+        ]
+    },
+    {
+        "name": "perl",
+        "aliases": [
+            "perl",
+            "pl"
+        ]
+    },
+    {
+        "name": "php",
+        "aliases": [
+            "php",
+            "php3",
+            "php4",
+            "php5"
+        ]
+    },
+    {
+        "name": "python3",
+        "aliases": [
+            "py",
+            "py3",
+            "python",
+            "python3"
+        ]
+    },
+    {
+        "name": "python2",
+        "aliases": [
+            "python2",
+            "py2"
+        ]
+    },
+    {
+        "name": "rust",
+        "aliases": [
+            "rs",
+            "rust"
+        ]
+    },
+    {
+        "name": "swift",
+        "aliases": [
+            "swift"
+        ]
+    },
+    {
+        "name": "typescript",
+        "aliases": [
+            "ts",
+            "typescript"
+        ]
+    }
+]