selinux: split up mac_selinux_have() from mac_selinux_use()

Let's distuingish the cases where our code takes an active role in
selinux management, or just passively reports whatever selinux
properties are set.

mac_selinux_have() now checks whether selinux is around for the passive
stuff, and mac_selinux_use() for the active stuff. The latter checks the
former, plus also checks UID == 0, under the assumption that only when
we run priviliged selinux management really makes sense.

Fixes: #1941

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libsystemd/sd-bus/bus-socket.c b/src/libsystemd/sd-bus/bus-socket.c
index 25873dea1e..1df571ac92 100644
--- a/src/libsystemd/sd-bus/bus-socket.c
+++ b/src/libsystemd/sd-bus/bus-socket.c
@@ -609,7 +609,7 @@ static void bus_get_peercred(sd_bus *b) {
         b->ucred_valid = getpeercred(b->input_fd, &b->ucred) >= 0;
 
         /* Get the SELinux context of the peer */
-        if (mac_selinux_use()) {
+        if (mac_selinux_have()) {
                 r = getpeersec(b->input_fd, &b->label);
                 if (r < 0 && r != -EOPNOTSUPP)
                         log_debug_errno(r, "Failed to determine peer security context: %m");