Philipp Marek wrote:
quoted text
> AFAIK pivot_root() changes the / mapping for *all* processes, no?
>   

The manual page is confusing.  It even admits to being "intentionally 
vague".  However the goal seems clear:

    "pivot_root() moves the root file system of the current process to
    the directory put_old and makes new_root the new root file system of
    the current process"
    -- man 2 pivot_root

There's an argument that pivot_root could be improved...
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