From 53ed9104284c7ad05b10d65d11455b30b31502f7 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 29 Mar 2003 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2003-03-29

---
 port/dev.c     |  6 +++++-
 port/devroot.c | 11 +++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/port/dev.c b/port/dev.c
index f585acc0484a7617b723e335f390e7c9d9f47e27..26549a061cad1a0271951258c8d833d59227b764 100644
--- a/port/dev.c
+++ b/port/dev.c
@@ -203,7 +203,11 @@ devwalk(Chan *c, Chan *nc, char **name, int nname, Dirtab *tab, int ntab, Devgen
 			continue;
 		}
 		if(strcmp(n, "..") == 0){
-			(*gen)(nc, nil, tab, ntab, DEVDOTDOT, &dir);
+			if((*gen)(nc, nil, tab, ntab, DEVDOTDOT, &dir) != 1){
+				print("devgen walk .. in dev%s %llux broken\n",
+					devtab[nc->type]->name, nc->qid.path);
+				error("broken devgen");
+			}
 			nc->qid = dir.qid;
 			goto Accept;
 		}
diff --git a/port/devroot.c b/port/devroot.c
index 20799edd62a9720db8ea1f33ef2dd80fe4135a60..e7bef3c194eca3edeca5fd54df98f0462418c082 100644
--- a/port/devroot.c
+++ b/port/devroot.c
@@ -133,6 +133,13 @@ rootgen(Chan *c, char *name, Dirtab*, int, int s, Dir *dp)
 		}
 		return devgen(c, name, bootlist.dir, bootlist.ndir, s, dp);
 	default:
+		if(s == DEVDOTDOT){
+			if((int)c->qid.path < Qboot)
+				devdir(c, (Qid){Qdir, 0, QTDIR}, "#/", 0, eve, 0555, dp);
+			else
+				devdir(c, (Qid){Qboot, 0, QTDIR}, "#/", 0, eve, 0555, dp);
+			return 1;
+		}
 		if(s != 0)
 			return -1;
 		if((int)c->qid.path < Qboot){
@@ -144,6 +151,10 @@ rootgen(Chan *c, char *name, Dirtab*, int, int s, Dir *dp)
 		}
 		if(t >= l->ndir)
 			return -1;
+if(t < 0){
+print("rootgen %llud %d %d\n", c->qid.path, s, t);
+panic("whoops");
+}
 		d = &l->dir[t];
 		devdir(c, d->qid, d->name, d->length, eve, d->perm, dp);
 		return 1;