From e89a82a4765739f52bfd1f2e65cdd105146063b0 Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis@chromium.org>
Date: Fri, 19 Jun 2020 08:22:47 -0400
Subject: [PATCH] LibC: Add support for POSIX_SPAWN_RESETIDS

This is possible now that seteuid() / setegid() are implemented.
---
 Libraries/LibC/spawn.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/Libraries/LibC/spawn.cpp b/Libraries/LibC/spawn.cpp
index 58759ec35f..774af16d02 100644
--- a/Libraries/LibC/spawn.cpp
+++ b/Libraries/LibC/spawn.cpp
@@ -48,6 +48,16 @@ extern "C" {
     }
     if (attr) {
         short flags = attr->flags;
+        if (flags & POSIX_SPAWN_RESETIDS) {
+            if (seteuid(getuid()) < 0) {
+                perror("posix_spawn seteuid");
+                exit(127);
+            }
+            if (setegid(getgid()) < 0) {
+                perror("posix_spawn setegid");
+                exit(127);
+            }
+        }
         if (flags & POSIX_SPAWN_SETPGROUP) {
             if (setpgid(0, attr->pgroup) < 0) {
                 perror("posix_spawn setpgid");
@@ -81,7 +91,7 @@ extern "C" {
             }
         }
 
-        // FIXME: POSIX_SPAWN_RESETIDS, POSIX_SPAWN_SETSCHEDULER
+        // FIXME: POSIX_SPAWN_SETSCHEDULER
     }
 
     exec(path, argv, envp);