From e5ba8b722e885860d0a94be5377befab19d766b8 Mon Sep 17 00:00:00 2001
From: Radon Rosborough <radon.neon@gmail.com>
Date: Sat, 22 Aug 2020 16:24:15 -0600
Subject: [PATCH] Reduce number of subshells generated

---
 backend/src/util.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/backend/src/util.ts b/backend/src/util.ts
index ba4e588..bffbce4 100644
--- a/backend/src/util.ts
+++ b/backend/src/util.ts
@@ -131,5 +131,10 @@ export function privilegedTeardown({ uid, uuid }: Context) {
 }
 
 export function bash(cmdline: string) {
+  if (!cmdline.match(/[;|&(){}=]/)) {
+    // Reduce number of subshells we generate, if we're just running a
+    // single command (no shell logic).
+    cmdline = "exec " + cmdline;
+  }
   return ["bash", "-c", cmdline];
 }