Extend to use poll backend. If memory serves correctly, most of this was

adapted from NetBSD..  However, there are some differences in the tty
system that are big enough to cause their code to not fit comfortably.

Obtained from:  NetBSD (I think)

1 files changed, 9 insertions, 7 deletions

diff --git a/sys/kern/tty_tty.c b/sys/kern/tty_tty.c
index bc0de91..fb648b1 100644
--- a/sys/kern/tty_tty.c
+++ b/sys/kern/tty_tty.c
@@ -31,13 +31,14 @@
  * SUCH DAMAGE.
  *
  *	@(#)tty_tty.c	8.2 (Berkeley) 9/23/93
- * $Id: tty_tty.c,v 1.16 1997/03/24 11:24:38 bde Exp $
+ * $Id: tty_tty.c,v 1.17 1997/09/02 20:05:56 bde Exp $
  */
 
 /*
  * Indirect driver for controlling tty.
  */
 #include <sys/param.h>
+#include <sys/systm.h>
 #include <sys/conf.h>
 #include <sys/proc.h>
 #include <sys/tty.h>
@@ -52,14 +53,14 @@ static	d_open_t	cttyopen;
 static	d_read_t	cttyread;
 static	d_write_t	cttywrite;
 static	d_ioctl_t	cttyioctl;
-static	d_select_t	cttyselect;
+static	d_poll_t	cttypoll;
 
 #define CDEV_MAJOR 1
 /* Don't make static, fdesc_vnops uses this. */
 struct cdevsw ctty_cdevsw = 
 	{ cttyopen,	nullclose,	cttyread,	cttywrite,	/*1*/
 	  cttyioctl,	nullstop,	nullreset,	nodevtotty,/* tty */
-	  cttyselect,	nommap,		NULL,	"ctty",	NULL,	-1 };
+	  cttypoll,	nommap,		NULL,	"ctty",	NULL,	-1 };
 
 
 #define cttyvp(p) ((p)->p_flag & P_CONTROLT ? (p)->p_session->s_ttyvp : NULL)
@@ -160,16 +161,17 @@ cttyioctl(dev, cmd, addr, flag, p)
 
 /*ARGSUSED*/
 static	int
-cttyselect(dev, flag, p)
+cttypoll(dev, events, p)
 	dev_t dev;
-	int flag;
+	int events;
 	struct proc *p;
 {
 	struct vnode *ttyvp = cttyvp(p);
 
 	if (ttyvp == NULL)
-		return (1);	/* try operation to get EOF/failure */
-	return (VOP_SELECT(ttyvp, flag, FREAD|FWRITE, NOCRED, p));
+		/* try operation to get EOF/failure */
+		return (seltrue(dev, events, p));
+	return (VOP_POLL(ttyvp, events, p->p_ucred, p));
 }
 
 static ctty_devsw_installed = 0;