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-rw-r--r--mkfs/selinux.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/mkfs/selinux.c b/mkfs/selinux.c
new file mode 100644
index 0000000..5fc4f52
--- /dev/null
+++ b/mkfs/selinux.c
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * selinux.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "mkfs.h"
+
+#define XATTR_NAME_SELINUX "security.selinux"
+#define XATTR_VALUE_SELINUX "system_u:object_r:unlabeled_t:s0"
+
+static int relable_node(fstree_t *fs, struct selabel_handle *sehnd,
+ tree_node_t *node)
+{
+ char *context = NULL, *path;
+ int ret;
+
+ path = fstree_get_path(node);
+ if (path == NULL)
+ goto fail;
+
+ if (selabel_lookup(sehnd, &context, path, node->mode) < 0) {
+ context = strdup(XATTR_VALUE_SELINUX);
+ if (context == NULL)
+ goto fail;
+ }
+
+ ret = fstree_add_xattr(fs, node, XATTR_NAME_SELINUX, context);
+ free(context);
+ free(path);
+ return ret;
+fail:
+ perror("relabeling files");
+ free(path);
+ return -1;
+}
+
+int fstree_relabel_selinux(fstree_t *fs, const char *filename)
+{
+ struct selabel_handle *sehnd;
+ struct selinux_opt seopts[] = {
+ { SELABEL_OPT_PATH, filename },
+ };
+ size_t i;
+ int ret = 0;
+
+ sehnd = selabel_open(SELABEL_CTX_FILE, seopts, 1);
+
+ if (sehnd == NULL) {
+ perror(filename);
+ return -1;
+ }
+
+ for (i = 2; i < fs->inode_tbl_size; ++i) {
+ ret = relable_node(fs, sehnd, fs->inode_table[i]);
+ if (ret)
+ break;
+ }
+
+ selabel_close(sehnd);
+ return ret;
+}