From 9644d46dac3aa5a6d290b7fee5fb326f37021c08 Mon Sep 17 00:00:00 2001
From: Falk Werner <falk.werner@gmx.net>
Date: Mon, 8 Jan 2024 17:52:05 +0100
Subject: [PATCH] add shim for closefrom to support systems without that
 function (glibc before 2.34)

---
 src/webfuse/util/authenticator.cpp            | 16 ++++++++++++++++
 test-src/integration/webfuse/test/process.cpp | 17 +++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/webfuse/util/authenticator.cpp b/src/webfuse/util/authenticator.cpp
index 579aaab..990aab9 100644
--- a/src/webfuse/util/authenticator.cpp
+++ b/src/webfuse/util/authenticator.cpp
@@ -4,6 +4,22 @@
 #include <sys/wait.h>
 #include <fcntl.h>
 
+#ifndef closefrom
+namespace
+{
+
+void closefrom(int fd)
+{
+    int const max_fd = sysconf(_SC_OPEN_MAX);
+    for(int i = fd; i < max_fd; i++)
+    {
+        close(i);
+    }
+}
+
+}
+#endif
+
 namespace webfuse
 {
 
diff --git a/test-src/integration/webfuse/test/process.cpp b/test-src/integration/webfuse/test/process.cpp
index 2866565..86e657e 100644
--- a/test-src/integration/webfuse/test/process.cpp
+++ b/test-src/integration/webfuse/test/process.cpp
@@ -9,6 +9,23 @@
 
 #include <stdexcept>
 
+#ifndef closefrom
+namespace
+{
+
+void closefrom(int fd)
+{
+    int const max_fd = sysconf(_SC_OPEN_MAX);
+    for(int i = fd; i < max_fd; i++)
+    {
+        close(i);
+    }
+}
+
+}
+#endif
+
+
 namespace webfuse
 {