c++ - 使用arm-none-linux-gnueabi-g++编译时不执行system()

Question

#include <stdio.h>
#include <stdlib.h>

int main()
{ 
    printf("Hello\n");
    system("echo nikhil");   
    printf("Hello\n");
    getchar();
    return 0;
}

当使用arm-none-linux-gnueabi-g++编译此代码时，系统调用将被跳过，除system("echo nikhil")之外的所有其他指令都会被执行

为什么会发生这种情况以及如何避免该问题？

Answer 1

system() will not, in fact, work properly from programs with set-user-ID or set-group-ID privileges on systems on which /bin/sh is bash version 2, since bash 2 drops privileges on startup... http://linux.die.net/man/3/system

您可以尝试使用Exec命令 http://linux.die.net/man/3/exec