russell at coker.com.au
Thu Feb 17 11:44:08 UTC 2005
On Tuesday 01 February 2005 01:48, Tim Waugh <twaugh at redhat.com> wrote:
> I just updated findutils to 4.2.15 in devel. Please check that I
> didn't make any mistakes porting the findutils-selinux.patch.
I can't comment on the changes as I never tested the old version. Here are
some suggestions about the current version:
getfilecon(/proc/2/maps): Operation not supported
Above is part of the output of "find / --context system_u:object_r:bin_t".
Perhaps it would make sense that whenever find enters a new file system it
checks whether the context is available and skips file systems of types that
don't support the XATTR interface to labelling. We could have a config file
which lists the supported file systems (ext2, ext3, xfs, devpts, and tmpfs at
the moment) so that find knows what to do. Or maybe this is something that
should be in the kernel? Another option might be to just have find give up
on a tree when a directory gives ENOTSUP.
Searching on context alone seems of little utility to me. I think it's likely
that most times when a search is being performed the desired result will
either be all files of a particular identity or of a particular type. For
example I may want to find files of type bin_t to discover the full list of
programs that can_exec(foo_t, bin_t) grants access to. The fact that I
created some files under /usr/local/bin by just copying them there as
administrator (and giving them the context of root:object_r:bin_t instead of
the usual system_u:object_r:bin_t) not something that concerns me.
Also saving some typing is a benefit too. When running chcon I often use the
-t option to save typing as usually I only want to change the type and am not
concerned about the identity.
The command `find . -printf "%Z %f\n"` returns the string "pipefs" instead of
the final "t" in file contexts. Eg here's part of the output of running such
a find command from the /var/run directory:
Here's "ls -lZ" output from the same file:
-rw-r--r-- root root system_u:object_r:xdm_var_run_t gdm.pid
Once again, being able to split out identity and type would be handy, the
-printf option has a huge number of ways of specifying atime with %A, maybe
having %Zi for identity, %Zt for type, and %z for full context would be a
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