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Re: Idea for *at system calls

> I had an idea how to implement the *at system calls in a less nasty
> way.  We invent to new system calls:

>       int push_thread_cwd(int filedes);
>       int pop_thread_cwd();

I don't think that's quite right.  A signal delivered between push and
pop would see the thread's (or process's - these calls aren't
threading-only, are they?) cwd set to the "wrong" value.

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