From 2ad062c4643136eb6068a00bce492e2d7d1e630c Mon Sep 17 00:00:00 2001
From: Baptiste Wicht <baptiste.wicht@gmail.com>
Date: Sat, 10 Sep 2016 15:46:57 +0200
Subject: [PATCH] ifconfig program

---
 programs/ifconfig/Makefile     |  14 +++++
 programs/ifconfig/src/main.cpp | 111 +++++++++++++++++++++++++++++++++
 2 files changed, 125 insertions(+)
 create mode 100644 programs/ifconfig/Makefile
 create mode 100644 programs/ifconfig/src/main.cpp

diff --git a/programs/ifconfig/Makefile b/programs/ifconfig/Makefile
new file mode 100644
index 00000000..0dd0190f
--- /dev/null
+++ b/programs/ifconfig/Makefile
@@ -0,0 +1,14 @@
+.PHONY: default clean
+
+EXEC_NAME=ifconfig
+
+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
diff --git a/programs/ifconfig/src/main.cpp b/programs/ifconfig/src/main.cpp
new file mode 100644
index 00000000..42e18396
--- /dev/null
+++ b/programs/ifconfig/src/main.cpp
@@ -0,0 +1,111 @@
+//=======================================================================
+// 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>
+#include <tlib/directory_entry.hpp>
+
+static constexpr const size_t BUFFER_SIZE = 4096;
+
+std::string read_file(const std::string& path){
+    auto fd = tlib::open(path.c_str());
+
+    if(fd.valid()){
+        auto info = tlib::stat(*fd);
+
+        if(info.valid()){
+            auto size = info->size;
+
+            auto buffer = new char[size+1];
+
+            auto content_result = tlib::read(*fd, buffer, size);
+
+            if(content_result.valid()){
+                if(*content_result != size){
+                    //TODO Read more
+                } else {
+                    buffer[size] = '\0';
+                    tlib::close(*fd);
+                    return buffer;
+                }
+            } else {
+                tlib::printf("cat: error: %s\n", std::error_message(content_result.error()));
+            }
+        } else {
+            tlib::printf("cat: error: %s\n", std::error_message(info.error()));
+        }
+
+        tlib::close(*fd);
+    } else {
+        tlib::printf("cat: error: %s\n", std::error_message(fd.error()));
+    }
+
+    return "";
+}
+
+int main(int /*argc*/, char* /*argv*/[]){
+    auto fd = tlib::open("/sys/net/");
+
+    if(fd.valid()){
+        auto info = tlib::stat(*fd);
+
+        if(info.valid()){
+            auto entries_buffer = new char[BUFFER_SIZE];
+
+            auto entries_result = tlib::entries(*fd, entries_buffer, BUFFER_SIZE);
+
+            if(entries_result.valid()){
+                size_t position = 0;
+
+                while(true){
+                    auto entry = reinterpret_cast<tlib::directory_entry*>(entries_buffer + position);
+
+                    std::string base_path = "/sys/net/";
+                    std::string entry_name = &entry->name;
+
+                    auto enabled = read_file(base_path + entry_name + "/enabled");
+
+                    if(enabled == "true"){
+                        auto driver = read_file(base_path + entry_name + "/driver");
+                        auto ip = read_file(base_path + entry_name + "/ip");
+                        auto mac = read_file(base_path + entry_name + "/mac");
+
+                        tlib::printf("%10s inet %s\n", &entry->name, ip.c_str());
+
+                        if(!mac.empty() && mac != "0"){
+                            tlib::printf("%10s ether %s\n", "", mac.c_str());
+                        }
+
+                        tlib::printf("%10s driver %s\n", "", driver.c_str());
+                    }
+
+                    if(!entry->offset_next){
+                        break;
+                    }
+
+                    tlib::printf("\n");
+
+                    position += entry->offset_next;
+                }
+            } else {
+                tlib::printf("ifconfig: error: %s\n", std::error_message(entries_result.error()));
+            }
+
+            delete[] entries_buffer;
+        } else {
+            tlib::printf("ifconfig: error: %s\n", std::error_message(info.error()));
+        }
+
+        tlib::close(*fd);
+    } else {
+        tlib::printf("ifconfig: error: %s\n", std::error_message(fd.error()));
+    }
+
+    return 0;
+}