--- ray/src/rt/devcomm.c	1990/03/12 11:08:44	1.16
+++ ray/src/rt/devcomm.c	1990/10/18 13:33:09	1.19
@@ -28,8 +28,6 @@ static char SCCSid[] = "$SunId$ LBL";
 #define vfork		fork
 #endif
 
-extern char	*getpath(), *getenv();
-
 static int	comm_close(), comm_clear(), comm_paintr(), comm_errout(),
 		comm_getcur(), comm_comout(), comm_comin(), comm_flush();
 
@@ -51,7 +49,7 @@ char	*dname, *id;
 	int	p1[2], p2[2];
 	char	pin[16], pout[16];
 						/* find driver program */
-	if ((devname = getpath(dname, DEVPATH, 1)) == NULL) {
+	if ((devname = getpath(dname, DEVPATH, X_OK)) == NULL) {
 		stderr_v(dname);
 		stderr_v(": not found\n");
 		return(NULL);
@@ -82,7 +80,7 @@ char	*dname, *id;
 	if (getw(devin) != COM_RECVM)
 		return(NULL);
 						/* get driver parameters */
-	comm_flush();
+	getstate();
 						/* set error vectors */
 	cmdvec = comm_comout;
 	if (wrnvec != NULL)
@@ -141,11 +139,7 @@ comm_flush()				/* flush output to driver */
 	fflush(devout);
 	if (getc(devin) != COM_FLUSH)
 		reply_error("flush");
-	fread((char *)&comm_driver.pixaspect,
-			sizeof(comm_driver.pixaspect), 1, devin);
-	comm_driver.xsiz = getw(devin);
-	comm_driver.ysiz = getw(devin);
-	comm_driver.inpready = getw(devin);
+	getstate();
 }
 
 
@@ -172,6 +166,8 @@ char	*str;
 {
 	putc(COM_COMOUT, devout);
 	myputs(str, devout);
+	if (str[strlen(str)-1] == '\n')
+		fflush(devout);
 }
 
 
@@ -191,7 +187,7 @@ char	*prompt;
 	if (getc(devin) != COM_COMIN)
 		reply_error("comin");
 	mygets(buf, devin);
-	comm_driver.inpready = getw(devin);
+	getstate();
 }
 
 
@@ -236,4 +232,15 @@ char	*routine;
 	stderr_v(routine);
 	stderr_v(": driver reply error\n");
 	quit(1);
+}
+
+
+static
+getstate()				/* get driver state variables */
+{
+	fread((char *)&comm_driver.pixaspect,
+			sizeof(comm_driver.pixaspect), 1, devin);
+	comm_driver.xsiz = getw(devin);
+	comm_driver.ysiz = getw(devin);
+	comm_driver.inpready = getw(devin);
 }