From: deraadt <deraadt@openbsd.org>
Date: Sat, 17 Oct 2015 22:58:30 +0000 (+0000)
Subject: Allow TIOCSCTTY on tty devices, if the pledge says "tty id"
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=3611f3d46d5805ecc93fc82c23d215099605a6cd;p=openbsd

Allow TIOCSCTTY on tty devices, if the pledge says "tty id"
worked out with nicm
---

diff --git a/sys/kern/kern_pledge.c b/sys/kern/kern_pledge.c
index a155f22cbed..08329c03a61 100644
--- a/sys/kern/kern_pledge.c
+++ b/sys/kern/kern_pledge.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_pledge.c,v 1.43 2015/10/17 22:54:23 deraadt Exp $	*/
+/*	$OpenBSD: kern_pledge.c,v 1.44 2015/10/17 22:58:30 deraadt Exp $	*/
 
 /*
  * Copyright (c) 2015 Nicholas Marriott <nicm@openbsd.org>
@@ -1103,6 +1103,11 @@ pledge_ioctl_check(struct proc *p, long com, void *v)
 				return (0);
 			break;
 #endif
+		case TIOCSCTTY:		/* tmux etc */
+			if ((p->p_p->ps_pledge & PLEDGE_ID) == 0 &&
+			    fp->f_type == DTYPE_VNODE && (vp->v_flag & VISTTY))
+				return (0);
+			break;
 		case TIOCSPGRP:
 			if ((p->p_p->ps_pledge & PLEDGE_PROC) == 0)
 				break;