selinux: rework selinux access check logic

a) Instead of parsing the bus messages inside of selinux-access.c
simply pass everything pre-parsed in the functions

b) implement the access checking with a macro that resolves to nothing
on non-selinux builds

c) split out the selinux checks into their own sources
selinux-util.[ch]

d) this unifies the job creation code behind the D-Bus calls
Manager.StartUnit() and Unit.Start().

1 files changed, 1 insertions, 14 deletions

diff --git a/src/shared/label.c b/src/shared/label.c
index 7aa362106e..2062fc316c 100644
--- a/src/shared/label.c
+++ b/src/shared/label.c
@@ -31,25 +31,12 @@
 #include "path-util.h"
 
 #ifdef HAVE_SELINUX
+#include "selinux-util.h"
 #include <selinux/selinux.h>
 #include <selinux/label.h>
 
 static struct selabel_handle *label_hnd = NULL;
 
-static int use_selinux_cached = -1;
-
-static inline bool use_selinux(void) {
-
-        if (use_selinux_cached < 0)
-                use_selinux_cached = is_selinux_enabled() > 0;
-
-        return use_selinux_cached;
-}
-
-void label_retest_selinux(void) {
-        use_selinux_cached = -1;
-}
-
 #endif
 
 int label_init(const char *prefix) {