在C中，当执行execvp()或类似的调用时，如何将stdin/stdout/stderr重定向到文件?

I have the following code:

我有以下代码:

pid_t pid = fork();
if (pid == -1)
{
    // ...
}
else if (pid == 0)
{
    stdin = someopenfile;
    stdout = someotherfile;
    stderr = somethirdopenfile;
    execvp(args[0], args);
    // handle error ...
}
else
{
    // ...
}
pid_t pi