如何通过代码执行shell，并获得终端信息

FILE *popen(const char *command, const char *type);
fgets();

#include <stdio.h>
#include <iostream>
#include <vector>

int execute_shell_command(const char *command, std::vector<std::string> & _hoge)
{
    char shell_buf[4096] = "";
    FILE *fp;
    fp = popen(command, "r");
    while(NULL != fgets(shell_buf, 4096, fp) )
    {
         if(shell_buf[strlen(shell_buf) - 1] == '\n')
              shell_buf[strlen(shell_buf)-1] = '\0';
         _hoge.push_back(shell_buf); //每次进来shell_buf都是新的，类似strcpy函数，上次存的数据，被新数据overwrite
     }
     plcose(fp)
     return _hoge.size();
     
}