In pledge "tty", allow TIOCSWINSZ. stty(1) is the obvious silly use.

The more important use will be tmux(1) and other active window size
controlling programs. There seems little risk in exposing this small
tty setting alongside the tcsetattr() family.
ok millert

diff --git a/sys/kern/kern_pledge.c b/sys/kern/kern_pledge.c
index 6612232..4fb0b83 100644 (file)
--- a/sys/kern/kern_pledge.c
+++ b/sys/kern/kern_pledge.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: kern_pledge.c,v 1.11 2015/10/11 01:56:56 guenther Exp $       */
+/*     $OpenBSD: kern_pledge.c,v 1.12 2015/10/11 15:25:39 deraadt Exp $        */
 
 /*
  * Copyright (c) 2015 Nicholas Marriott <nicm@openbsd.org>
@@ -1031,6 +1031,7 @@ pledge_ioctl_check(struct proc *p, long com, void *v)
                        return (ENOTTY);
                case TIOCGPGRP:
                case TIOCGWINSZ:        /* various programs */
+               case TIOCSWINSZ:
                        if (fp->f_type == DTYPE_VNODE && (vp->v_flag & VISTTY))
                                return (0);
                        break;