Various additions and fixes.

src/lib9/dirwstat.c

@@ -0,0 +1,21 @@
+#include <u.h>
+#define NOPLAN9DEFINES
+#include <libc.h>
+
+#include <sys/time.h>
+
+int
+dirwstat(char *file, Dir *dir)
+{
+	struct timeval tv[2];
+
+	/* BUG handle more */
+	if(dir->mtime == ~0ULL)
+		return 0;
+
+	tv[0].tv_sec = dir->mtime;
+	tv[0].tv_usec = 0;
+	tv[1].tv_sec = dir->mtime;
+	tv[1].tv_usec = 0;
+	return utimes(file, tv);
+}