Add program 'free'

Display stats about memory

programs/free/Makefile

@@ -0,0 +1,14 @@
+.PHONY: default clean
+
+EXEC_NAME=free
+
+default: link
+
+include ../../cpp.mk
+
+$(eval $(call program_compile_cpp_folder,src))
+$(eval $(call program_link_executable,$(EXEC_NAME)))
+
+clean:
+	@ echo -e "Remove compiled files"
+	@ rm -rf debug

programs/free/src/main.cpp

@@ -0,0 +1,71 @@
+//=======================================================================
+// Copyright Baptiste Wicht 2013-2016.
+// Distributed under the terms of the MIT License.
+// (See accompanying file LICENSE or copy at
+//  http://www.opensource.org/licenses/MIT)
+//=======================================================================
+
+#include <tlib/file.hpp>
+#include <tlib/system.hpp>
+#include <tlib/errors.hpp>
+#include <tlib/print.hpp>
+
+std::string read_file(const std::string& path, bool check = true){
+    tlib::file f(path);
+
+    if(!f){
+        if(check){
+            tlib::printf("ifconfig: error: %s\n", std::error_message(f.error()));
+        }
+
+        return "";
+    }
+
+    auto contents = f.read_file();
+
+    if(!f){
+        tlib::printf("ifconfig: error: %s\n", std::error_message(f.error()));
+    }
+
+    return contents;
+}
+
+int main(int /*argc*/, char* /*argv*/[]){
+    auto str_virt_memory_avail = read_file("/sys/memory/virtual/available");
+    auto str_virt_memory_free = read_file("/sys/memory/virtual/free");
+    auto str_virt_memory_alloc = read_file("/sys/memory/virtual/allocated");
+
+    if(str_virt_memory_avail.empty() || str_virt_memory_free.empty() || str_virt_memory_alloc.empty()){
+        return 1;
+    }
+
+    auto str_phys_memory_avail = read_file("/sys/memory/physical/available");
+    auto str_phys_memory_free = read_file("/sys/memory/physical/free");
+    auto str_phys_memory_alloc = read_file("/sys/memory/physical/allocated");
+
+    if(str_phys_memory_avail.empty() || str_phys_memory_free.empty() || str_phys_memory_alloc.empty()){
+        return 1;
+    }
+
+    auto virt_memory_avail = atoui(str_virt_memory_avail);
+    auto virt_memory_free = atoui(str_virt_memory_free);
+    auto virt_memory_alloc = atoui(str_virt_memory_alloc);
+
+    auto phys_memory_avail = atoui(str_phys_memory_avail);
+    auto phys_memory_free = atoui(str_phys_memory_free);
+    auto phys_memory_alloc = atoui(str_phys_memory_alloc);
+
+    tlib::printf(" Virtual: available:%m free:%m allocated:%m\n", virt_memory_avail, virt_memory_free, virt_memory_alloc);
+
+    if(virt_memory_avail - (virt_memory_alloc + virt_memory_free)){
+        tlib::printf("         diffrence!::%m\n", virt_memory_avail - (virt_memory_alloc + virt_memory_free));
+    }
+
+    tlib::printf("Physical: available:%m free:%m allocated:%m\n", phys_memory_avail, phys_memory_free, phys_memory_alloc);
+
+    if(phys_memory_avail - (phys_memory_alloc + phys_memory_free)){
+        tlib::printf("         diffrence!::%m\n", phys_memory_avail - (phys_memory_alloc + phys_memory_free));
+    }
+
+    return 0;
+}