示例#1
0
int mac_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;
        bool initialized = false;

        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);

        /* 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 {
示例#2
0
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.");
       }
#endif

       return 0;
}