Add stdin

api/src/index.js

@@ -39,6 +39,13 @@ app.post(
             isArray: {
                 errorMessage: 'Supplied args is not an array',
             },
+        },
+        stdin: {
+            in: 'body',
+            optional: true,
+            isString: {
+                errorMessage: 'Supplied stdin is not a string',
+            },
         }
     }),
     async (req, res) => {
@@ -49,7 +56,7 @@ app.post(
                 language.aliases.includes(req.body.language.toLowerCase())
             );
 
-            const { stdout, stderr, output, ran } = await execute(language, req.body.source, req.body.args);
+            const { stdout, stderr, output, ran } = await execute(language, req.body.source, req.body.args, req.body.stdin);
 
             res.status(200).json({
                 ran,

cli/execute

@@ -26,7 +26,7 @@ const [languageName, sourceFile, ...args] = process.argv.slice(2);
         return;
     }
 
-    const { output } = await execute(language, source, args);
+    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
+cat $3 > $basepath$argpath
+echo "${@:4}" > $basepath$argpath
 
 # process incrementor
 exec 200>$dir/lockfile

lxc/executors/bash

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

lxc/executors/brainfuck

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

lxc/executors/c

@@ -1,4 +1,4 @@
 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"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"

lxc/executors/cpp

@@ -1,4 +1,4 @@
 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"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"

lxc/executors/csharp

@@ -1,4 +1,4 @@
 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"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 mono binary < stdin.stdin"

lxc/executors/deno

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

lxc/executors/elixir

@@ -3,5 +3,5 @@ cd /tmp/$2
 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"
+    runuser runner$1 -c "cd /tmp/$2 ; cat args.args ; xargs -d '\n' timeout -s KILL 3 elixir code.code < stdin.stdin"
 fi

lxc/executors/emacs

@@ -3,5 +3,5 @@ cd /tmp/$2
 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"
+    runuser runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 emacs -Q --script code.code < stdin.stdin"
 fi

lxc/executors/go

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

lxc/executors/haskell

@@ -4,4 +4,4 @@ mv code.code code.hs
 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"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"

lxc/executors/java

@@ -6,4 +6,4 @@ mv interim.java $name.java
 runuser runner$1 -c "\
     cd /tmp/$2 ; \
     javac $name.java ; \
-    cat args.args | xargs -d '\n' timeout -s KILL 3 java $name"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 java $name < stdin.stdin"

lxc/executors/jelly

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

lxc/executors/julia

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

lxc/executors/kotlin

@@ -3,4 +3,4 @@ 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"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 java -jar code.jar < stdin.stdin"

lxc/executors/lua

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

lxc/executors/nasm

@@ -2,4 +2,4 @@ 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"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"

lxc/executors/nasm64

@@ -2,4 +2,4 @@ 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"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"

lxc/executors/node

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

lxc/executors/perl

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

lxc/executors/php

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

lxc/executors/python2

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

lxc/executors/python3

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

lxc/executors/ruby

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

lxc/executors/rust

@@ -2,4 +2,4 @@ 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"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 ./binary < stdin.stdin"

lxc/executors/swift

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

lxc/executors/typescript

@@ -4,4 +4,4 @@ runuser runner$1 -c "\
     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"
+    cat args.args | xargs -d '\n' timeout -s KILL 3 node code.code < stdin.stdin"

shared/execute.js

@@ -1,7 +1,7 @@
 const { writeFile } = require('fs/promises');
 const { spawn } = require('child_process');
 
-function execute(language, source, args) {
+function execute(language, source, args, stdin) {
     return new Promise(async resolve => {
         const stamp = new Date().getTime();
         const sourceFile = `/tmp/${stamp}.code`;
@@ -11,6 +11,7 @@ function execute(language, source, args) {
         const process = spawn(__dirname + '/../lxc/execute', [
             language.name,
             sourceFile,
+            stdin ?? '',
             args?.join('\n') ?? '',
         ]);