Re: [PATCH] private mounts
From: Bryan Henderson (hbryan_at_us.ibm.com)
Date: 04/27/05
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To: Bodo Eggert <7eggert@gmx.de> Date: Tue, 26 Apr 2005 15:07:58 -0700
>> Just to be clear, then: this idea is fundamentally different from the
>> mkdir/cd analogy the thread starts with above.
>
>NACK, it's very similar to the cd "$HOME" (or ulimit calls) done by the
>login mechanism,
That's not a NACK. The cd "$HOME" and ulimit calls done by the login
process (more precisely, by a shell profile) are quite different from the
mkdir/cd the thread started with. Who creates a new directory in his
shell profile? I assume the mkdir/cd analogy is a case of a person doing
a mkdir and cd in a running shell. (That is indeed analogous to what one
would like to do with a private mount).
When you said "by the login process or by wrappers like nice," in response
to my pointing out that setnamespace would need to be a shell builtin
command, I assumed you were talking about putting it in the code that
execs the shell as opposed to in the shell profile, thus eliminating the
need for a shell builtin.
But the important thing is just to recognize, as you say explicitly now,
that setnamespace has to be shell builtin command for
setnamespace/mknamespace to be analogous to mkdir/cd. That was my
original statement, if somewhat indirect:
>> >> >mknamespace -p users/$UID # (like mkdir -p)
>> >> >setnamespace users/$UID # (like cd)
>> >> ^^^^^^^^
>> >> You realize that 'cd' is a shell command, and has to be, I hope.
That
>> >> little fact has thrown a wrench into many of the ideas in this
thread.
-- Bryan Henderson IBM Almaden Research Center San Jose CA Filesystems - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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