From 7fb8303fe94e23c267db66a899db2504825868b6 Mon Sep 17 00:00:00 2001
From: Sergey Fedorov <barracuda@macos-powerpc.org>
Date: Tue, 1 Apr 2025 03:25:02 +0800
Subject: [PATCH] FileDescriptor: provide fallback if F_DUPFD_CLOEXEC is
 undefined

---
 include/hyprutils/os/FileDescriptor.hpp | 5 +++++
 src/os/FileDescriptor.cpp               | 9 ++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/hyprutils/os/FileDescriptor.hpp b/include/hyprutils/os/FileDescriptor.hpp
index 96761d0..aa9dbf2 100644
--- a/include/hyprutils/os/FileDescriptor.hpp
+++ b/include/hyprutils/os/FileDescriptor.hpp
@@ -1,6 +1,11 @@
 #pragma once
 
 #include <fcntl.h>
+
+#ifndef F_DUPFD_CLOEXEC
+#define F_DUPFD_CLOEXEC F_DUPFD
+#endif
+
 namespace Hyprutils {
     namespace OS {
         class CFileDescriptor {
diff --git a/src/os/FileDescriptor.cpp b/src/os/FileDescriptor.cpp
index f13a3ee..3d3c766 100644
--- a/src/os/FileDescriptor.cpp
+++ b/src/os/FileDescriptor.cpp
@@ -55,7 +55,14 @@ CFileDescriptor CFileDescriptor::duplicate(int flags) const {
     if (m_fd == -1)
         return {};
 
-    return CFileDescriptor{fcntl(m_fd, flags, 0)};
+    int new_fd;
+#ifdef F_DUPFD_CLOEXEC
+    new_fd = fcntl(m_fd, flags, 0);
+#else
+    new_fd = fcntl(m_fd, flags | FD_CLOEXEC, 0);
+#endif
+
+    return CFileDescriptor{new_fd};
 }
 
 bool CFileDescriptor::isClosed() const {