From 6a66bd864b9b95258a198e65849fa693f88032aa Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sun, 18 Oct 2015 17:27:50 +0200
Subject: Prevent external changes to `FileDescriptorGuard`'s fd member

---
 io.h | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

(limited to 'io.h')

diff --git a/io.h b/io.h
index c9ce30e..87778ec 100644
--- a/io.h
+++ b/io.h
@@ -10,20 +10,27 @@
 
 namespace io {
 
-struct FileDescriptorGuard {
-	FileDescriptorGuard(const std::string& path) {
-		this->fd = open(path.c_str(), O_WRONLY | O_APPEND);
+class FileDescriptorGuard {
+	public:
+		FileDescriptorGuard(const std::string& path) {
+			this->fd = open(path.c_str(), O_WRONLY | O_APPEND);
+
+			if ( !this->fd ) {
+				this->fd = STDERR_FILENO;
+			}
+		}
 
-		if ( !this->fd ) {
-			this->fd = STDERR_FILENO;
+		~FileDescriptorGuard() {
+			close(this->fd);
 		}
-	}
 
-	~FileDescriptorGuard() {
-		close(this->fd);
-	}
+		operator int() {
+			return this->fd;
+		}
+
+	private:
+		int fd;
 
-	int fd;
 };
 
 std::string get_file_name(int fd) {
-- 
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