Re: [Gnu-arch-users] {arch} perms - {arch} in revlib?

[Tom Lord]

    > From: John Meinel <address@hidden>

    > As a side thing, are shared revlibs safe? I thought they didn't do much 
    > in the way of locking, so 2 people sharing a writeable revlib could have 
    > problems. (I would guess readonly shared revlibs are no problem.)

Concurrent use of a shared revlib is safe by design (of course, there
may be as-yet undetected implementation bugs, though I can't imagine
ways in which any such would be more than minor annoyances).

Revlibs are a "write once" database in which certain fixed-definition
trees are inserted upon demand at certain fixed locations.   The
`rename' libc function makes that kind of thing fairly easy to
implement in a simple way.  

-t