1 files changed, 98 insertions, 0 deletions
diff --git a/src/core/smack-setup.c b/src/core/smack-setup.c
new file mode 100644
index 0000000000..88e6437445
--- /dev/null
+++ b/src/core/smack-setup.c
@@ -0,0 +1,98 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2013 Intel Corporation
+  Authors:
+        Nathaniel Chen <nathaniel.chen@intel.com>
+
+  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 <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/vfs.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <sys/mount.h>
+#include <stdint.h>
+
+#include "macro.h"
+#include "smack-setup.h"
+#include "util.h"
+#include "log.h"
+#include "label.h"
+
+#define ACCESSES_D_PATH "/etc/smack/accesses.d/"
+
+int smack_setup(void) {
+        _cleanup_fclose_ FILE *smack = NULL;
+        _cleanup_closedir_ DIR *dir = NULL;
+        struct dirent *entry;
+        char buf[NAME_MAX];
+        int dfd = -1;
+
+        smack = fopen("/sys/fs/smackfs/load2", "we");
+        if (!smack)  {
+                log_info("Smack is not enabled in the kernel, not loading access rules.");
+                return 0;
+        }
+
+        /* write rules to load2 from every file in the directory */
+        dir = opendir(ACCESSES_D_PATH);
+        if (!dir) {
+                log_info("Smack access rules directory not found: " ACCESSES_D_PATH);
+                return 0;
+        }
+
+        dfd = dirfd(dir);
+        if (dfd < 0) {
+                log_error("Smack access rules directory " ACCESSES_D_PATH " not opened: %m");
+                return 0;
+        }
+
+        FOREACH_DIRENT(entry, dir, return 0) {
+                _cleanup_fclose_ FILE *policy = NULL;
+                _cleanup_close_ int pol = -1;
+
+                pol = openat(dfd, entry->d_name, O_RDONLY|O_CLOEXEC);
+                if (pol < 0) {
+                        log_error("Smack access rule file %s not opened: %m", entry->d_name);
+                        continue;
+                }
+
+                policy = fdopen(pol, "re");
+                if (!policy) {
+                        log_error("Smack access rule file %s not opened: %m", entry->d_name);
+                        continue;
+                }
+
+                pol = -1;
+
+                /* load2 write rules in the kernel require a line buffered stream */
+                FOREACH_LINE(buf, policy, log_error("Failed to read from Smack access rule file %s: %m", entry->d_name)) {
+                        fputs(buf, smack);
+                        fflush(smack);
+                }
+        }
+
+        log_info("Successfully loaded Smack policies.");
+
+        return 0;
+}