1 files changed, 41 insertions, 0 deletions
diff --git a/lib/base/atomic-file.hpp b/lib/base/atomic-file.hpp
new file mode 100644
index 0000000..c5c7897
--- /dev/null
+++ b/lib/base/atomic-file.hpp
@@ -0,0 +1,41 @@
+/* Icinga 2 | (c) 2022 Icinga GmbH | GPLv2+ */
+
+#ifndef ATOMIC_FILE_H
+#define ATOMIC_FILE_H
+
+#include "base/string.hpp"
+#include <boost/iostreams/device/file_descriptor.hpp>
+#include <boost/iostreams/stream.hpp>
+
+namespace icinga
+{
+
+/**
+ * Atomically replaces a file's content.
+ *
+ * @ingroup base
+ */
+class AtomicFile : public boost::iostreams::stream<boost::iostreams::file_descriptor>
+{
+public:
+	static void Write(String path, int mode, const String& content);
+
+	AtomicFile(String path, int mode);
+	~AtomicFile();
+
+	inline const String& GetTempFilename() const noexcept
+	{
+		return m_TempFilename;
+	}
+
+	void Commit();
+
+private:
+	String m_Path;
+	String m_TempFilename;
+	int m_Fd;
+};
+
+}
+
+#endif /* ATOMIC_FILE_H */