Re: Security question: "Text file busy" overwriting executables but not shared libraries?

From: Aaron Lehmann (
Date: Sat Oct 13 2001 - 17:50:05 EST

On Sat, Oct 13, 2001 at 04:27:48PM -0600, Eric W. Biederman wrote:
> > But it does have the advantage of allowing the sharing of memory, does
> > it not?
> Only if you are going to write to the data.

Why? If gcc and another application read the source file with an
mmap() with the right parameters (read-only), it would only be shared
between them, as I understand it. If they both read() the file into
private buffers those can not be shared.
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This archive was generated by hypermail 2b29 : Mon Oct 15 2001 - 21:00:52 EST