From ef99ca9eda28619bd59ae919ae8229eaf978e64e Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Mon, 12 Dec 1994 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1994-12-12

---
 boot/boot.c   |  3 +++
 port/chan.c   | 10 ++++------
 port/devmnt.c |  5 +++--
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/boot/boot.c b/boot/boot.c
index 8b9a97b8a6602686455b7f243ff63bdaa51af231..505c00c5da7b8a39f698207e550e4f1e405bdbb0 100644
--- a/boot/boot.c
+++ b/boot/boot.c
@@ -306,15 +306,18 @@ reattach(int rec, Method *amp, char *buf)
 	p = strrchr(buf, '/');
 	if(p == 0)
 		goto fail;
+
 	*p = '\0';
 
 	sprint(tmp, "%s/remote", buf);
 	fd = open(tmp, OREAD);
 	if(fd < 0)
 		goto fail;
+
 	n = read(fd, tmp, sizeof(tmp));
 	if(n < 0)
 		goto fail;
+
 	close(fd);
 	tmp[n-1] = '\0';
 
diff --git a/port/chan.c b/port/chan.c
index 419047e7813d2943decbafe057960ecad79eba78..c658afe99d6229214ccc5035cfaa877eedf01683 100644
--- a/port/chan.c
+++ b/port/chan.c
@@ -500,8 +500,7 @@ mchan(char *id)
 			for(t = f->mount; t; t = t->next) {
 				c = t->to;
 				if(c->type == mdev && c->mntptr->id == mountid) {
-					c = c->mntptr->c;
-					incref(c);
+					c = clone(c, 0);
 					runlock(&pg->ns);
 					poperror();
 					return c;
@@ -562,10 +561,9 @@ namec(char *name, int amode, int omode, ulong perm)
 		elem[n] = '\0';
 		n = chartorune(&r, elem+1)+1;
 		if(r == 'M') {
-			if(amode != Aopen || omode != ORDWR)
-				error(Eperm);
-			skipslash(name);
-			return mchan(elem+n);
+			c = mchan(elem+n);
+			name = skipslash(name);
+			break;
 		}
 		t = devno(r, 1);
 		if(t == -1)
diff --git a/port/devmnt.c b/port/devmnt.c
index 305617f49e2b47e9b2c8af58a6e2711b4271802e..fafa977c7af36a826ef9a9e117e320170e91fc00 100644
--- a/port/devmnt.c
+++ b/port/devmnt.c
@@ -221,7 +221,7 @@ mattach(Mnt *m, Chan *c, char *spec)
 	r = mntralloc(0);
 	c->mntptr = m;
 
-	if(waserror()){
+	if(waserror()) {
 		mntfree(r);
 		nexterror();
 	}
@@ -991,7 +991,8 @@ mntrecover(Mnt *m, Mntrpc *r)
 
 	r->done = 0;
 	mntrecdel(m, r);
-	recoverchan(m, r->c);
+	if(r->c != 0)
+		recoverchan(m, r->c);
 
 	up->psstate = ps;
 }