+ /* Avoid directory traversal by forbidding "..", but also work around
+ * other funny business by just specifying a fairly strict format. For
+ * example, now we don't have to stress out about the Cygwin port.
+ */
+ for (p = ctx.qry.path; *p; ++p) {
+ if (*p == '.' && *(p + 1) == '.')
+ goto err;
+ if (!isalnum(*p) && *p != '/' && *p != '.' && *p != '-')
+ goto err;
+ }
+