From 9c118ce1ba5afd7cc9920e0e79cd2b377618541a Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sun, 28 Aug 1994 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1994-08-28

---
 carrera/fns.h | 1 +
 port/devmnt.c | 6 ++++--
 port/error.h  | 2 +-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/carrera/fns.h b/carrera/fns.h
index fbdf3fd26c96de04d4f8742b847849eb2f1781fd..4123fbaeb3adc7b330b40664333f5af890e51948 100644
--- a/carrera/fns.h
+++ b/carrera/fns.h
@@ -128,6 +128,7 @@ void	ifjab(void);
 ulong	ifaddr(void*);
 void	filiput(Block*);
 void	fiberint(int);
+void	freset(void*);
 void	audiosbintr(void);
 void	audiodmaintr(void);
 ulong	fwblock(void*, void*, ulong);
diff --git a/port/devmnt.c b/port/devmnt.c
index 07cc5454c8330363025095470498e84c3f353ff1..5e5c584d5aea0f82788072e02e90412f1ada1bda 100644
--- a/port/devmnt.c
+++ b/port/devmnt.c
@@ -758,7 +758,7 @@ mountmux(Mnt *m, Mntrpc *r)
 int
 mntflush(Mnt *m, Mntrpc *r)
 {
-	int n;
+	int n, l;
 	Fcall flush;
 
 	lock(m);
@@ -779,7 +779,9 @@ mntflush(Mnt *m, Mntrpc *r)
 		mntqrm(m, r);
 		return 0;
 	}
-	(*devtab[m->c->type].write)(m->c, r->flush, n, 0);
+	l = (*devtab[m->c->type].write)(m->c, r->flush, n, 0);
+	if(l != n)
+		error(Ehungup);
 	poperror();
 	return 1;
 }
diff --git a/port/error.h b/port/error.h
index 789686bc1da6546f4961c11f357865126455cb42..fc1219f98cca0e00b57dd76eec8cd489acd7c205 100644
--- a/port/error.h
+++ b/port/error.h
@@ -25,7 +25,7 @@ extern char Enoproto[];		/* network protocol not supported */
 extern char Enoport[];		/* network port not available */
 extern char Enoifc[];		/* bad interface or no free interface slots */
 extern char Enolisten[];	/* not announced */
-extern char Ehungup[];		/* write to hungup stream */
+extern char Ehungup[];		/* write to hungup channel */
 extern char Ebadctl[];		/* bad process or stream control request */
 extern char Enodev[];		/* no free devices */
 extern char Enoenv[];		/* no free environment resources */