add selinux plugin

This patch adds an selinux plugin that sets up an environment with
selinux turned *off* in the build chroot. How does this work? From the
author's description:

It is done the same as the patch sent by Thomas Liu in bz 614440 does.
Actually, this proceeding was suggested by Dan Walsh in bz 573111.

1.) Fake /proc/filesystems is created in conf["cachedir"]. It includes the
same content as the same file in host environment, except line with selinuxfs.
This file is bind mounted into build environment.

2.) Option '--setopt=tsflags=nocontext' is added to yum commands. This is done
by wrapping mock.util.do with _selinuxDoYum in "preyum" hook. This function
just adds the option and passes the command to original mock.util.do function.
The wrapping is removed in "postyum" hook.
I didn't find cleaner method, without modifying main code.

Signed-off-by: Clark Williams <williams@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/py/mock.py b/py/mock.py
index dd002de..a0e585d 100755
--- a/py/mock.py
+++ b/py/mock.py
@@ -244,7 +244,7 @@ def setup_default_config_opts(config_opts, unprivUid):
     #    root_cache next.
     #    after that, any plugins that must create dirs (yum_cache)
     #    any plugins without preinit hooks should be last.
-    config_opts['plugins'] = ('tmpfs', 'root_cache', 'yum_cache', 'bind_mount', 'ccache')
+    config_opts['plugins'] = ('tmpfs', 'root_cache', 'yum_cache', 'bind_mount', 'ccache', 'selinux')
     config_opts['plugin_dir'] = os.path.join(PKGPYTHONDIR, "plugins")
     config_opts['plugin_conf'] = {
             'ccache_enable': True,
@@ -273,6 +273,8 @@ def setup_default_config_opts(config_opts, unprivUid):
             'tmpfs_opts': {
                 'required_ram_mb': 900,
                 'max_fs_size': None},
+            'selinux_enable': True,
+            'selinux_opts': {},
             }
 
     # dependent on guest OS