--- /dev/null
+--- l2tpd-0.70-pre20031121.orig/l2tpd.c.orig 2006-04-05 13:28:36.000000000 +0100
++++ l2tpd-0.70-pre20031121.orig/l2tpd.c 2006-04-05 13:33:39.000000000 +0100
+@@ -289,6 +289,8 @@
+ #endif
+ struct termios ptyconf;
+ char *str;
++ int flags;
++
+ p = opts;
+ stropt[0] = strdup (PPPD);
+ while (p)
+@@ -347,6 +349,14 @@
+ close(c->fd);
+ return -EINVAL;
+ }
++ flags = fcntl(c->fd, F_GETFL);
++ if (flags < 0 || fcntl(c->fd, F_SETFL, flags | O_NONBLOCK) < 0)
++ {
++ log (LOG_WARN, "%s: unable to fcntl(O_NONBLOCK) on pty\n",
++ __FUNCTION__);
++ close(c->fd);
++ return -EINVAL;
++ }
+ tty = ptsname(c->fd);
+ if (tty == NULL)
+ {