+char **
+do_readlinklist (const char *path, char *const *names)
+{
+ int fd_cwd;
+ size_t i;
+ ssize_t r;
+ char link[PATH_MAX];
+ const char *str;
+ char **ret = NULL;
+ int size = 0, alloc = 0;
+
+ CHROOT_IN;
+ fd_cwd = open (path, O_RDONLY | O_DIRECTORY);
+ CHROOT_OUT;
+
+ if (fd_cwd == -1) {
+ reply_with_perror ("open: %s", path);
+ return NULL;
+ }
+
+ for (i = 0; names[i] != NULL; ++i) {
+ r = readlinkat (fd_cwd, names[i], link, sizeof link);
+ if (r >= PATH_MAX) {
+ reply_with_perror ("readlinkat: returned link is too long");
+ close (fd_cwd);
+ return NULL;
+ }
+ /* Because of the way this function is intended to be used,
+ * we actually expect to see errors here, and they are not fatal.
+ */
+ if (r >= 0) {
+ link[r] = '\0';
+ str = link;
+ } else
+ str = "";
+ if (add_string (&ret, &size, &alloc, str) == -1) {
+ close (fd_cwd);
+ return NULL;
+ }
+ }
+
+ close (fd_cwd);
+
+ if (add_string (&ret, &size, &alloc, NULL) == -1)
+ return NULL;
+
+ return ret;
+}
+