采用管道执行命令行的功能分享

JerusalemSky

参考博客园博客：https://www.cnblogs.com/alantu2018/p/8554281.html

int my_system(const char cmd)
{
FILE fp;
int res;
char buf[1024];
std::string strError;

if (cmd == NULL)
{
    //printf("my_system cmd is NULL!\n");
    strError = "my_system cmd is NULL!\n";
    return -1;
}

if ((fp = _popen(cmd, "r")) == NULL)
{
    perror("popen");
    //printf("popen error: %s/n", strerror(errno));
    strError = strerror(errno);
    return -1;
}
else
{
    while (fgets(buf, sizeof(buf), fp))
    {
        //printf("%s", buf);
        strError += buf;
    }

    if ((res = _pclose(fp)) == -1)
    {
        //printf("close popen file pointer fp error!\n");
        strError = "close popen file pointer fp error!\n";

        return res;
    }
    else if (res == 0)
    {
        return res;
    }
    else
    {
        //printf("popen res is :%d\n", res);
        strError = "popen res is" + to_string((long long)res);
        return res;
    }
}

}