lib: fs namespacing 1/5: add path_* helpers

path_state and path_config return full path names to configuration /
state files. path_set_namespace can be used to include a namespace part
into the paths returned.

1 files changed, 65 insertions, 0 deletions

diff --git a/lib/paths.c b/lib/paths.c
new file mode 100644
index 00000000..5678b873
--- /dev/null
+++ b/lib/paths.c
@@ -0,0 +1,65 @@
+/*
+ * Path helper functions (for namespaces)
+ * Copyright (C) 2009 David Lamparter
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2, or (at your
+ * option) any later version.
+ *
+ * GNU Zebra 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING.  If not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <zebra.h>
+#include <log.h>
+#include <paths.h>
+
+static char *namespace = "";
+
+void path_set_namespace(const char *ns)
+{
+	size_t len;
+
+	if (*namespace)
+		free(namespace);
+	if (!ns || !*ns) {
+		namespace = "";
+		return;
+	}
+
+	len = strlen(ns);
+	namespace = malloc(len + 2);
+	if (!namespace) {		/* ugh... */
+		namespace = "";
+		return;
+	};
+	namespace[0] = '/';
+	memcpy(namespace + 1, ns, len + 1);
+}
+
+const char *path_state(const char *filename)
+{
+	static char buf[MAXPATHLEN];
+	snprintf(buf, sizeof(buf), "%s%s/%s",
+			PATH_STATE, namespace, filename);
+	return buf;
+}
+
+const char *path_config(const char *filename)
+{
+	static char buf[MAXPATHLEN];
+	snprintf(buf, sizeof(buf), "%s%s/%s",
+			PATH_CONFIG, namespace, filename);
+	return buf;
+}
+