Linux,实时获取磁盘空间

 #include <iostream>
 #include <stdlib.h>
 #include <stdio.h>
 #include <sys/statfs.h>
 #include <string>

 using std::cout;
 using std::endl;
 using std::string;

 int main()
 {
     FILE *pFile = fopen("test", "rw");
     string strPath("/root");

     fclose(pFile);
     struct statfs tagStatfs;
     statfs(strPath.c_str(), &tagStatfs);

     while() {
         statfs(strPath.c_str(), &tagStatfs);
         cout<<"tagStatfs.f_bfree = "<<tagStatfs.f_bfree<<endl;
         sleep();
     }

     return ;
 }