From 21e64560a7b4e16b4bbd212d2475017861ce7c31 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sun, 31 Oct 1993 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1993-10-31

---
 port/devcons.c |  1 +
 port/devproc.c |  7 ++++---
 port/devroot.c | 12 ++++++++++++
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/port/devcons.c b/port/devcons.c
index 491e661245586b1f2be383b813bb7074570b427a..83d7e48d32ba8a0ba2776214a82136a5cd8df988 100644
--- a/port/devcons.c
+++ b/port/devcons.c
@@ -482,6 +482,7 @@ consclose(Chan *c)
 				kbd.raw = 0;
 			qunlock(&kbd);
 		}
+		break;
 	case Qauth:
 	case Qauthcheck:
 	case Qauthent:
diff --git a/port/devproc.c b/port/devproc.c
index 93b0ed1a74e3dce2241c97962dd70ceed39667a4..de89cb9878e312ebdb6f34d9f235fa8aac173f31 100644
--- a/port/devproc.c
+++ b/port/devproc.c
@@ -1,4 +1,4 @@
-#include	"u.h"
+ #include	"u.h"
 #include	"../port/lib.h"
 #include	"mem.h"
 #include	"dat.h"
@@ -521,8 +521,9 @@ procwrite(Chan *c, void *va, long n, ulong offset)
 {
 	int id;
 	Proc *p, *t, *et;
-	char buf[ERRLEN];
+	char *a, buf[ERRLEN];
 
+	a = va;
 	if(c->qid.path & CHDIR)
 		error(Eisdir);
 
@@ -583,7 +584,7 @@ procwrite(Chan *c, void *va, long n, ulong offset)
 			error("note not posted");
 		break;
 	case Qnoteid:
-		id = atoi((char*)va);
+		id = atoi(a);
 		if(id == p->pid) {
 			p->noteid = id;
 			break;
diff --git a/port/devroot.c b/port/devroot.c
index 39af63fa56c7ae24d6a17cfcd410dc6eafaf868b..791f8ebf71f3432e2df1c99437693a4c48905a79 100644
--- a/port/devroot.c
+++ b/port/devroot.c
@@ -33,6 +33,7 @@ Dirtab rootdir[Nfiles]={
 
 static uchar	*rootdata[Nfiles];
 static int	nroot = Qboot - 1;
+static int	recovbusy;
 
 typedef struct Recover Recover;
 struct Recover
@@ -118,8 +119,11 @@ rootopen(Chan *c, int omode)
 	default:
 		break;
 	case Qrecover:
+		if(recovbusy)
+			error(Einuse);		
 		if(strcmp(up->user, eve) != 0)
 			error(Eperm);
+		recovbusy = 1;
 		break;
 	}
 
@@ -140,6 +144,14 @@ void
 rootclose(Chan *c)
 {
 	USED(c);
+	switch(c->qid.path) {
+	default:
+		break;
+	case Qrecover:
+		if(c->flag&COPEN)
+			recovbusy = 0;
+		break;
+	}
 }
 
 int