From 88af7a47fc7194a1bd4c699f1da55e86f4576dec Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Fri, 9 Aug 2013 19:30:55 +0200
Subject: [PATCH] Initial commit: Mode checks for config file

---
 .gitignore       |  1 +
 CMakeLists.txt   | 11 +++++++++++
 dyn-nsupdate.cpp | 37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 49 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 CMakeLists.txt
 create mode 100644 dyn-nsupdate.cpp

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..378eac2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+build
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..3865aad
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 2.6) 
+project(Dyn-NSupdate)
+
+FIND_PACKAGE( Boost 1.40 REQUIRED )
+INCLUDE_DIRECTORIES( ${Boost_INCLUDE_DIR} )
+
+set(CMAKE_CXX_FLAGS "-Wall -Wextra ${CMAKE_CXX_FLAGS}")
+
+ADD_EXECUTABLE( dyn-nsupdate dyn-nsupdate.cpp )
+
+TARGET_LINK_LIBRARIES( dyn-nsupdate ${Boost_LIBRARIES} )
diff --git a/dyn-nsupdate.cpp b/dyn-nsupdate.cpp
new file mode 100644
index 0000000..e378082
--- /dev/null
+++ b/dyn-nsupdate.cpp
@@ -0,0 +1,37 @@
+#include <iostream>
+#include <boost/property_tree/ptree.hpp>
+#include <boost/property_tree/ini_parser.hpp>
+
+#include <sys/stat.h>
+
+int main(int argc, const char **argv)
+{
+	if (argc < 2) {
+		std::cerr << "Usage: " << argv[0] << " <configuration file>" << std::endl;
+		return 1;
+	}
+	const char *filename = argv[1];
+	
+	struct stat file_stat;
+	int ret = lstat(filename, &file_stat);
+	if (ret != 0) {
+		std::cerr << "Unable to stat " << filename << "." << std::endl;
+		return 1;
+	}
+	/* Check if the file is suited */
+	if (!S_ISREG(file_stat.st_mode)) {
+		std::cerr << filename << " is not a file." << std::endl;
+		return 1;
+	}
+	if (file_stat.st_uid != geteuid()) {
+		std::cerr << filename << " must be owned by user executing " << argv[0] << "." << std::endl;
+		return 1;
+	}
+	if (file_stat.st_mode & (S_IWGRP | S_IWOTH)) { /* can be written by group/others */
+		std::cerr << filename << " must not be writeable by group or others." << std::endl;
+		return 1;
+	}
+	
+	std::cout << "Hi world!" << std::endl;
+	return 0;
+}
-- 
2.30.2