From 536f719c65eda67d5354e8b72d95fcd2e49b22d5 Mon Sep 17 00:00:00 2001
From: Pavel Labath <pavelo@centrum.sk>
Date: Sun, 27 Feb 2011 00:03:17 +0100
Subject: [PATCH] exception class for c functions which set errno

---
 src/c++wrap.hh | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/c++wrap.hh b/src/c++wrap.hh
index 499ce1e8..ae6cc96f 100644
--- a/src/c++wrap.hh
+++ b/src/c++wrap.hh
@@ -24,8 +24,20 @@
 #ifndef CPPWRAP_HH
 #define CPPWRAP_HH
 
+#include <stdexcept>
 #include <string>
 
 std::string strerror_r(int errnum);
 
+class errno_error: public std::runtime_error {
+	typedef std::runtime_error Base;
+
+public:
+	errno_error(const std::string &prefix, int err_ = errno)
+		: Base(prefix + ": " + strerror_r(err_)), err(err_)
+	{}
+
+	const int err;
+};
+
 #endif /* CPPWRAP_HH */