-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- 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>
+#include <stdio.h>
+#include <unistd.h>
-#ifdef HAVE_SELINUX
+#if HAVE_SELINUX
#include <selinux/selinux.h>
#endif
+#include "log.h"
+#include "macro.h"
#include "selinux-setup.h"
#include "selinux-util.h"
-#include "label.h"
-#include "mount-setup.h"
-#include "macro.h"
+#include "string-util.h"
#include "util.h"
-#include "log.h"
-#ifdef HAVE_SELINUX
+#if HAVE_SELINUX
+_printf_(2,3)
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);
-
- /* 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.");
- }
+int mac_selinux_setup(bool *loaded_policy) {
+
+#if HAVE_SELINUX
+ int enforce = 0;
+ usec_t before_load, after_load;
+ char *con;
+ int r;
+ static const union selinux_callback cb = {
+ .func_log = null_log,
+ };
+
+ bool initialized = false;
+
+ assert(loaded_policy);
+
+ /* Turn off all of SELinux' own logging, we want to do that */
+ selinux_set_callback(SELINUX_CB_LOG, cb);
+
+ /* Don't load policy in the initrd if we don't appear to have
+ * it. For the real root, we check below if we've already
+ * loaded policy, and return gracefully.
+ */
+ if (in_initrd() && access(selinux_path(), F_OK) < 0)
+ return 0;
+
+ /* Already initialized by somebody else? */
+ r = getcon_raw(&con);
+ if (r == 0) {
+ initialized = !streq(con, "kernel");
+ freecon(con);
+ }
+
+ /* 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) {
+ _cleanup_(mac_selinux_freep) char *label = NULL;
+ char timespan[FORMAT_TIMESPAN_MAX];
+
+ mac_selinux_retest();
+
+ /* Transition to the new context */
+ r = mac_selinux_get_create_label_from_exe(SYSTEMD_BINARY_PATH, &label);
+ if (r < 0 || !label) {
+ log_open();
+ log_error("Failed to compute init label, ignoring.");
+ } else {
+ r = setcon_raw(label);
+
+ log_open();
+ if (r < 0)
+ log_error("Failed to transition into init label '%s', ignoring.", label);
+ }
+
+ after_load = now(CLOCK_MONOTONIC);
+
+ log_info("Successfully loaded SELinux policy in %s.",
+ format_timespan(timespan, sizeof(timespan), after_load - before_load, 0));
+
+ *loaded_policy = true;
+
+ } else {
+ log_open();
+
+ if (enforce > 0) {
+ if (!initialized) {
+ log_emergency("Failed to load SELinux policy.");
+ return -EIO;
+ }
+
+ log_warning("Failed to load new SELinux policy. Continuing with old policy.");
+ } else
+ log_debug("Unable to load SELinux policy. Ignoring.");
+ }
#endif
- return 0;
+ return 0;
}
projects / thirdparty / systemd.git / blobdiff