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

From: Richard Gooch (rgooch@ras.ucalgary.ca)
Date: Sat Oct 13 2001 - 17:41:48 EST

Jamie Lokier writes:
> There are applications (GCC comes to mind) which are using mmap() to
> read files now because it is measurably faster than read(), for
> sufficiently large source files.

So? MAP_PRIVATE is just fine for these. The simple solution if you
care about an edit in the middle of a compile is to have your editor
write a new file and do an atomic rename. No half-and-half data
problems, and the VM logic is kept simple (well, relative to what we
have now;-).

                                Regards,

                                        Richard....
Permanent: rgooch@atnf.csiro.au
Current: rgooch@ras.ucalgary.ca
-
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/

This archive was generated by hypermail 2b29 : Mon Oct 15 2001 - 21:00:52 EST