1 files changed, 56 insertions, 0 deletions
diff --git a/release/src/router/busybox/libbb/selinux_common.c b/release/src/router/busybox/libbb/selinux_common.c
new file mode 100644
index 00000000..275a761d
--- /dev/null
+++ b/release/src/router/busybox/libbb/selinux_common.c
@@ -0,0 +1,56 @@
+/*
+ * libbb/selinux_common.c
+ *   -- common SELinux utility functions
+ *
+ * Copyright 2007 KaiGai Kohei <kaigai@kaigai.gr.jp>
+ *
+ * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ */
+#include "libbb.h"
+#include <selinux/context.h>
+
+context_t FAST_FUNC set_security_context_component(security_context_t cur_context,
+					 char *user, char *role, char *type, char *range)
+{
+	context_t con = context_new(cur_context);
+	if (!con)
+		return NULL;
+
+	if (user && context_user_set(con, user))
+		goto error;
+	if (type && context_type_set(con, type))
+		goto error;
+	if (range && context_range_set(con, range))
+		goto error;
+	if (role && context_role_set(con, role))
+		goto error;
+	return con;
+
+error:
+	context_free(con);
+	return NULL;
+}
+
+void FAST_FUNC setfscreatecon_or_die(security_context_t scontext)
+{
+	if (setfscreatecon(scontext) < 0) {
+		/* Can be NULL. All known printf implementations
+		 * display "(null)", "<null>" etc */
+		bb_perror_msg_and_die("cannot set default "
+				"file creation context to %s", scontext);
+	}
+}
+
+void FAST_FUNC selinux_preserve_fcontext(int fdesc)
+{
+	security_context_t context;
+
+	if (fgetfilecon(fdesc, &context) < 0) {
+		if (errno == ENODATA || errno == ENOTSUP)
+			return;
+		bb_perror_msg_and_die("fgetfilecon failed");
+	}
+	setfscreatecon_or_die(context);
+	freecon(context);
+}
+