+/* dir_pathname is set by sys_opendir and used in readlinkat and in
+ fstatat, when they get a special FD of zero, which means use the
+ last directory opened by opendir. */
+static char dir_pathname[MAXPATHLEN];
+DIR *
+sys_opendir (const char *dirname)
+{
+ _fixpath (dirname, dir_pathname);
+ return opendir (dirname);
+}
+
+ssize_t
+readlinkat (int fd, char const *name, char *buffer, size_t buffer_size)
+{
+ /* Rely on a hack: an open directory is modeled as file descriptor 0,
+ as in fstatat. FIXME: Add proper support for readlinkat. */
+ char fullname[MAXPATHLEN];
+
+ if (fd != AT_FDCWD)
+ {
+ if (strlen (dir_pathname) + strlen (name) + 1 >= MAXPATHLEN)
+ {
+ errno = ENAMETOOLONG;
+ return -1;
+ }
+ sprintf (fullname, "%s/%s", dir_pathname, name);
+ name = fullname;
+ }
+
+ return readlink (name, buffer, buffer_size);
+}
+