- /* skip ".." component followed by slash or end */
- p += 2;
- if (*p == '/')
- p++;
- if (sanp != start) {
- /* back up sanp one level */
- --sanp; /* now pointing at slash */
- while ((sanp > start) && (*(sanp - 1) != '/')) {
- /* skip back up to slash */
- sanp--;
+ /* ".." component followed by slash or end */
+ if ((depth > 0) && (sanp == start)) {
+ /* allow depth levels of .. at the beginning */
+ --depth;
+ allowdotdot = 1;
+ } else {
+ p += 2;
+ if (*p == '/')
+ p++;
+ if (sanp != start) {
+ /* back up sanp one level */
+ --sanp; /* now pointing at slash */
+ while ((sanp > start) && (*(sanp - 1) != '/')) {
+ /* skip back up to slash */
+ sanp--;
+ }