From 1b90c61f1fd4d83054a60ed5d21c6f76f1d23925 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Wed, 11 Aug 2021 20:08:33 -0700
Subject: [PATCH] provide __close on musl

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

---
 base/files/scoped_file_linux.cc | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/base/files/scoped_file_linux.cc b/base/files/scoped_file_linux.cc
index e72b5b7248..958f7c2823 100644
--- a/base/files/scoped_file_linux.cc
+++ b/base/files/scoped_file_linux.cc
@@ -7,6 +7,7 @@
 #include <algorithm>
 #include <array>
 #include <atomic>
+#include <dlfcn.h>
 
 #include "base/compiler_specific.h"
 #include "base/debug/stack_trace.h"
@@ -81,9 +82,18 @@ bool IsFDOwned(int fd) {
 
 extern "C" {
 
-int __close(int);
-
 __attribute__((visibility("default"), noinline)) int close(int fd) {
+  static int (*__close)(int) = nullptr;
+
+  if (__close == nullptr) {
+    __close = (int (*)(int))dlsym(RTLD_NEXT, "close");
+
+    if (__close == nullptr) {
+      RAW_LOG(ERROR, "musl close not found\n");
+      IMMEDIATE_CRASH();
+    }
+  }
+
   if (base::IsFDOwned(fd) && g_is_ownership_enforced)
     CrashOnFdOwnershipViolation();
   return __close(fd);