+
+/* Call readlink to get the symbolic link value of FILENAME.
+ Return a pointer to that NUL-terminated string in malloc'd storage.
+ If readlink fails, return NULL and set errno. */
+extern char *xreadlink (char const *filename);
+
+/* Call readlink to get the symbolic link value of FILENAME.
+ SIZE_HINT is a hint as to how long the link is expected to be;
+ typically it is taken from st_size. It need not be correct.
+ Return a pointer to that NUL-terminated string in malloc'd storage.
+ If readlink fails, return NULL and set errno. */
+extern char *xreadlink_with_size (char const *filename, size_t size_hint);