sync code with last improvements from OpenBSD

app/xterm/vms.h

@@ -0,0 +1,41 @@
+/* $XTermId: vms.h,v 1.6 2022/10/06 19:37:30 tom Exp $ */
+
+/* vms.h
+ */
+#include <ssdef.h>
+#include <iodef.h>
+#include <msgdef.h>
+#include <descrip.h>
+#include <dvidef.h>
+#include <jpidef.h>
+#include <prcdef.h>
+#include <dcdef.h>
+#include <ttdef.h>
+#include <tt2def.h>
+#include <accdef.h>
+#include <prvdef.h>
+
+struct IOSB
+{
+	short int status;
+	short int len;
+	int unused;
+} mbx_read_iosb,iosb;
+
+#define MAXITEMLIST   5
+
+short int	tt_chan;    /* channel to the Pseudo terminal */
+short int	mbx_chan;   /* channel to the mailbox */
+struct accdef	mbx_buf;    /* mailbox buffer */
+short int	mbxunit;    /* mailbox unit number */
+int		pid;		/* PID of created process */
+static $DESCRIPTOR  (image, "SYS$SYSTEM:LOGINOUT.EXE");
+
+static struct	    items {
+	short int	buflen;
+	short int	code;
+	int		buffer;
+	int		return_addr;
+} itemlist[MAXITEMLIST];
+
+int tt_write(const char *tt_write_buf, size_t size);