On Tuesday 11 September 2007 23:13, Alexander Kriegisch wrote:
I am sending this answer to the list again, because it was my initial
mistake that I sent the first copy of my last message to your address
instead of to the list.
Sorry, Denys, I was never talking about the scenario you are
I know, but it is not default behaviour, i.e. without manually changing
the POSIX switch in the source code it will still unlink devices and
recreate them as files. This affects all users negatively, independent
of their wish to be POSIX-compliant. My tendency is to call this a bug,
not some
On Tuesday 11 September 2007 00:19, Alexander Kriegisch wrote:
In SVN rev. #18119 [1] the default behaviour of 'cp' was changed by
Denis in order to improve security and also to save a few bytes. This
leads to problems in our application scenario here: We work on a
mipsel-based router platform
Hi Denys!
Thanks for introducing a special case for block/character devices. :) In
a way, you did more than I requested, in another you did not, because
DO_POSIX_CP still is not configurable the way I thought it was obviously
inquired by me. But as so often, questions need to be asked more
On Tuesday 11 September 2007 14:53, Ralf Friedl wrote:
Hi Denys
Can you point to real security problems from the use of cp with POSIX
semantics?
User comes to you and says I accidentally deleted my most important
directory. I know that you make daily backups. Can you restore
it from backup?
On Tuesday 11 September 2007 12:34, Alexander Kriegisch wrote:
Hi Denys!
Thanks for introducing a special case for block/character devices. :) In
a way, you did more than I requested, in another you did not, because
DO_POSIX_CP still is not configurable the way I thought it was obviously
User comes to you and says I accidentally deleted my most important
directory. I know that you make daily backups. Can you restore
it from backup?
You do
cp -a /backup/home/user/dir /home/user
But user has crafted it so that backup contains
dir/many_more_dirs/innocuous_file, and he also
On Tuesday 11 September 2007 17:32, Ralf Friedl wrote:
User comes to you and says I accidentally deleted my most important
directory. I know that you make daily backups. Can you restore
it from backup?
You do
cp -a /backup/home/user/dir /home/user
But user has crafted it so that
I am sending this answer to the list again, because it was my initial
mistake that I sent the first copy of my last message to your address
instead of to the list.
Sorry, Denys, I was never talking about the scenario you are mentioning,
really just about overwriting an existing character device
In SVN rev. #18119 [1] the default behaviour of 'cp' was changed by
Denis in order to improve security and also to save a few bytes. This
leads to problems in our application scenario here: We work on a
mipsel-based router platform equipped with a TFFS (tiny flash
filesystem) showing several files
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