1 files changed, 123 insertions, 0 deletions
diff --git a/src/core/selinux-setup.c b/src/core/selinux-setup.c
new file mode 100644
index 0000000000..e9c0de92f1
--- /dev/null
+++ b/src/core/selinux-setup.c
@@ -0,0 +1,123 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+
+#ifdef HAVE_SELINUX
+#include <selinux/selinux.h>
+#endif
+
+#include "selinux-setup.h"
+#include "selinux-util.h"
+#include "label.h"
+#include "mount-setup.h"
+#include "macro.h"
+#include "util.h"
+#include "log.h"
+
+#ifdef HAVE_SELINUX
+static int null_log(int type, const char *fmt, ...) {
+        return 0;
+}
+#endif
+
+int selinux_setup(bool *loaded_policy) {
+
+#ifdef HAVE_SELINUX
+       int enforce = 0;
+       usec_t before_load, after_load;
+       security_context_t con;
+       int r;
+       union selinux_callback cb;
+
+       assert(loaded_policy);
+
+       /* Turn off all of SELinux' own logging, we want to do that */
+       cb.func_log = null_log;
+       selinux_set_callback(SELINUX_CB_LOG, cb);
+
+       /* Make sure getcon() works, which needs /proc and /sys */
+       mount_setup_early();
+
+       /* Already initialized by somebody else? */
+       r = getcon_raw(&con);
+       if (r == 0) {
+               bool initialized;
+
+               initialized = !streq(con, "kernel");
+               freecon(con);
+
+               if (initialized)
+                       return 0;
+       }
+
+       /* Make sure we have no fds open while loading the policy and
+        * transitioning */
+       log_close();
+
+       /* Now load the policy */
+       before_load = now(CLOCK_MONOTONIC);
+       r = selinux_init_load_policy(&enforce);
+       if (r == 0) {
+               char timespan[FORMAT_TIMESPAN_MAX];
+               char *label;
+
+               retest_selinux();
+
+               /* Transition to the new context */
+               r = label_get_create_label_from_exe(SYSTEMD_BINARY_PATH, &label);
+               if (r < 0 || label == NULL) {
+                       log_open();
+                       log_error("Failed to compute init label, ignoring.");
+               } else {
+                       r = setcon(label);
+
+                       log_open();
+                       if (r < 0)
+                               log_error("Failed to transition into init label '%s', ignoring.", label);
+
+                       label_free(label);
+               }
+
+               after_load = now(CLOCK_MONOTONIC);
+
+               log_info("Successfully loaded SELinux policy in %s.",
+                         format_timespan(timespan, sizeof(timespan), after_load - before_load));
+
+               *loaded_policy = true;
+
+       } else {
+               log_open();
+
+               if (enforce > 0) {
+                       log_error("Failed to load SELinux policy. Freezing.");
+                       return -EIO;
+               } else
+                       log_debug("Unable to load SELinux policy. Ignoring.");
+       }
+#endif
+
+       return 0;
+}