On Mon, Aug 17 2009, Christopher J. PeBenito wrote:
On Fri, 2009-08-14 at 11:50 -0500, Manoj Srivastava wrote:
On Fri, Aug 14 2009, Manoj Srivastava wrote:
I am running into an issue with sepolgen on Debian. Debian
ships
more than one version of the refpolicy, a default one, and a
MLS enabled one. So, the include files live in either
/usr/share/selinux/{default,mls}/include
sepolgen (in src/sepolgen/defaults.py) sets
refpolicy_devel() to
a single location -- and thus, only one version of the security
policy
may be supported. So, sepolgen-ifgen from policycoreutils can
only work
with one policy, which may not be the one installed on the target
machine. Could this be made configurable, somehow? As far as I
can
see, sepolgen's python library does not offer any way to set the
value.
It would be nice if the location of the include directory
could
be looked for from a PATH like variable setting, to make it
easier for
distributions to ship more than one policy, or for end users to
experiment with other policies without have to overwrite the
single
default.
Well, here is a kind of proof-of-concept patch (python is
not my
strong suit), and I have only tested in that it allows the
package to
compile, and the following code works:
[...]
def refpolicy_makefile():
- return refpolicy_devel() + "/Makefile"
+ chooser = PathChoooser("/etc/selinux/sepolgen.conf")
+ return chooser("Makefile")
def headers():
- return refpolicy_devel() + "/include"
-
+ chooser = PathChoooser("/etc/selinux/sepolgen.conf")
+ return chooser("include")
+
Why are you making another config file rather than just get the policy
name from /etc/selinux/config via selinux_getpolicytype()?
This will work well for Debian, since the development
files are
installed under "/usr/share/selinux/" in a subdirectory named
after the
policy. I was not sure that this convention was followed in other
distributions, though. While I am not certain, google implies
that in
fedora policy type is targeted, but the devel files do not live in
/usr/share/selinux/targeted.[0]. Given that, perhaps it is better to
let the user provide guidance about how to map the policy type to a
directory?
Also, I must confess I had forgotten about this call.
However, a patch with this is trivial, so an alternate patch
follows. (Not sure this will work for fedora, so caveat emptor)
manoj
[0]
http://docs.fedoraproject.org/selinux-user-guide/f11/en-US/chap-Security-Enhanced_Linux-Working_with_SELinux.html
--8<---------------cut here---------------start------------->8---
If the user installs a policy whose development files do not live under
/usr/share/selinux/devel/include, sepolgen wqould not work. Debian, for
instance, installs under:
/usr/share/selinux/{default,mls}/include
This patch uses selinux_getpolicytype() to determine the policy
type, and
assumes that there is one-on-one correspondence between policytype and
the directory the development files live in.
Signed-off-by: Manoj Srivastava<srivasta@xxxxxxxxxx>
---
src/sepolgen/defaults.py | 4 +++-
src/sepolgen/module.py | 2 +-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/sepolgen/defaults.py b/src/sepolgen/defaults.py
index 45ce61a..85e5fb0 100644
--- a/src/sepolgen/defaults.py
+++ b/src/sepolgen/defaults.py
@@ -21,6 +21,8 @@
Various default settings, including file and directory locations.
"""
+import selinux
+
def data_dir():
return "/var/lib/sepolgen"
@@ -31,7 +33,7 @@ def interface_info():
return data_dir() + "/interface_info"
def refpolicy_devel():
- return "/usr/share/selinux/devel"
+ return "/usr/share/selinux/" + selinux.selinux_getpolicytype()[1]
def refpolicy_makefile():
return refpolicy_devel() + "/Makefile"
diff --git a/src/sepolgen/module.py b/src/sepolgen/module.py
index edd24c6..355c9b8 100644
--- a/src/sepolgen/module.py
+++ b/src/sepolgen/module.py
@@ -120,7 +120,7 @@ class ModuleCompiler:
self.semodule_package = "/usr/bin/semodule_package"
self.output = output
self.last_output = ""
- self.refpol_makefile = "/usr/share/selinux/devel/Makefile"
+ self.refpol_makefile = "/usr/share/selinux/" +
selinux.selinux_getpolicytype()[1] + "/Makefile"
self.make = "/usr/bin/make"
def o(self, str):
