Added posix code

conts/posix/fs0/include/path.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2008 Bahadir Balban
+ *
+ * Path lookup related information
+ */
+#ifndef __PATH_H__
+#define __PATH_H__
+
+#include <l4/lib/list.h>
+#include <task.h>
+
+/*
+ * FIXME:
+ * These ought to be strings and split/comparison functions should
+ * always use strings because formats like UTF-8 wouldn't work.
+ */
+#define VFS_CHAR_SEP		'/'
+#define VFS_STR_ROOTDIR		"/"
+#define VFS_STR_PARDIR		".."
+#define VFS_STR_CURDIR		"."
+#define VFS_STR_XATDIR		"...."
+
+struct pathdata {
+	struct link list;
+	struct vnode *vstart;
+};
+
+struct pathcomp {
+	struct link list;
+	const char *str;
+};
+
+struct pathdata *pathdata_parse(const char *pathname, char *pathbuf,
+				struct tcb *task);
+void pathdata_destroy(struct pathdata *p);
+
+/* Destructive, i.e. unlinks those components from list */
+const char *pathdata_next_component(struct pathdata *pdata);
+const char *pathdata_last_component(struct pathdata *pdata);
+
+#endif /* __PATH_H__ */