reorganize project

tools/cgattach.cpp

@@ -0,0 +1,30 @@
+#include "cgroup_attach.hpp"
+#include "common.hpp"
+#include <cstdlib>
+using namespace std;
+
+void print_usage() { fprintf(stdout, "usage: cgattach <pid> <cgroup>\n"); }
+
+int main(int argc, char *argv[]) {
+  int flag = setuid(0);
+  if (flag != 0) {
+    perror("cgattach need root");
+    exit(EXIT_FAILURE);
+  }
+
+  if (argc != 3) {
+    error("need exact 2 paramaters");
+    print_usage();
+    exit(EXIT_FAILURE);
+  }
+
+  string pid = string(argv[1]);
+  string cgroup_target = string(argv[2]);
+
+  if (validPid(pid)&&validCgroup(cgroup_target)){
+    CGPROXY::CGROUP::attach(pid, cgroup_target);
+  }else{
+    error("param not valid");
+    exit(EXIT_FAILURE);
+  }
+}