From 95456b5ed190cb737a4c0cda3975b7c515381184 Mon Sep 17 00:00:00 2001
From: Ivor Wanders <ivor@iwanders.net>
Date: Tue, 6 Dec 2022 10:54:21 +0100
Subject: [PATCH] Make the copied library writable.

We need to make sure the library is writable before trying to patchelf
it.
---
 src/nixglhost_wrapper.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/nixglhost_wrapper.py b/src/nixglhost_wrapper.py
index 09b7006..4431a73 100755
--- a/src/nixglhost_wrapper.py
+++ b/src/nixglhost_wrapper.py
@@ -7,6 +7,7 @@ import os
 import re
 import shutil
 import subprocess
+import stat
 import sys
 import time
 from glob import glob
@@ -254,7 +255,8 @@ def copy_and_patch_libs(dsos: List[ResolvedLib], libs_dir: str, rpath=None) -> N
         newpath = os.path.join(libs_dir, basename)
         log_info(f"Copying and patching {dso} to {newpath}")
         shutil.copyfile(dso.fullpath, newpath)
-        shutil.copymode(dso.fullpath, newpath)
+        # Provide write permissions to ensure we can patch this binary.
+        os.chmod(newpath, os.stat(dso.fullpath).st_mode | stat.S_IWUSR)
         patch_dso(newpath, rpath)