selinux: automatically load policy if the initrd hasn't done this for us yet

[elogind.git] / src / selinux-setup.c

diff --git a/src/selinux-setup.c b/src/selinux-setup.c
new file mode 100644 (file)
index 0000000..d4da693
--- /dev/null
+++ b/src/selinux-setup.c
@@ -0,0 +1,64 @@
+/*-*- 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 General Public License as published by
+  the Free Software Foundation; either version 2 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
+  General Public License for more details.
+
+  You should have received a copy of the GNU 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 "macro.h"
+#include "util.h"
+#include "log.h"
+
+int selinux_setup(char *const argv[]) {
+#ifdef HAVE_SELINUX
+       int enforce = 0;
+
+       /* Already initialized? */
+       if (path_is_mount_point("/selinux") > 0)
+               return 0;
+
+       if (selinux_init_load_policy(&enforce) == 0) {
+               log_info("Successfully loaded SELinux policy, reexecuting.");
+
+               /* FIXME: Ideally we'd just call setcon() here instead
+                * of having to reexecute ourselves here. */
+
+               execv(SYSTEMD_BINARY_PATH, argv);
+               log_error("Failed to reexecute: %m");
+               return -errno;
+
+       } else {
+               log_full(enforce > 0 ? LOG_ERR : LOG_DEBUG, "Failed to load SELinux policy.");
+
+               if (enforce > 0)
+                       return -EIO;
+       }
+#endif
+
+       return 0;
+}