--- ray/src/rt/devcomm.c	1997/11/11 19:55:03	2.5
+++ ray/src/rt/devcomm.c	2003/07/02 01:15:20	2.8
@@ -1,15 +1,14 @@
-/* Copyright (c) 1988 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: devcomm.c,v 2.8 2003/07/02 01:15:20 greg Exp $";
 #endif
-
 /*
  *  devcomm.c - communication routines for separate drivers.
  *
- *	10/5/88
+ *  External symbols declared in driver.h
  */
 
+#include "copyright.h"
+
 #include "standard.h"
 
 #include "color.h"
@@ -22,15 +21,16 @@ static char SCCSid[] = "$SunId$ LBL";
 #define DEVPATH		getenv("PATH")	/* device search path */
 #endif
 
-static int	comm_close(), comm_clear(), comm_paintr(),
-		comm_getcur(), comm_comout(), comm_comin(), comm_flush();
+static int	comm_getcur();
+static void	comm_close(), comm_clear(), comm_paintr(),
+		comm_comin(), comm_comout(), comm_flush();
 
 struct driver	comm_driver = {
 	comm_close, comm_clear, comm_paintr, comm_getcur,
 	comm_comout, comm_comin, comm_flush
 };
 
-static int	mygets(), myputs(), reply_error(), getstate();
+static void	mygets(), myputs(), reply_error(), getstate();
 
 FILE	*devin, *devout;
 
@@ -69,15 +69,16 @@ struct driver *
 comm_init(dname, id)			/* set up and execute driver */
 char	*dname, *id;
 {
-	char	*devname;
+	char	*dvcname;
 	int	p1[2], p2[2];
 	char	pin[16], pout[16];
 						/* find driver program */
-	if ((devname = getpath(dname, DEVPATH, X_OK)) == NULL) {
+	if ((dvcname = getpath(dname, DEVPATH, X_OK)) == NULL) {
 		eputs(dname);
 		eputs(": not found\n");
 		return(NULL);
 	}
+#ifdef RHAS_FORK_EXEC
 						/* open communication pipes */
 	if (pipe(p1) == -1 || pipe(p2) == -1)
 		goto syserr;
@@ -86,8 +87,8 @@ char	*dname, *id;
 		close(p2[0]);
 		sprintf(pin, "%d", p1[0]);
 		sprintf(pout, "%d", p2[1]);
-		execl(devname, dname, pin, pout, id, 0);
-		perror(devname);
+		execl(dvcname, dname, pin, pout, id, 0);
+		perror(dvcname);
 		_exit(127);
 	}
 	if (devchild == -1)
@@ -102,10 +103,18 @@ char	*dname, *id;
 syserr:
 	perror(dname);
 	return(NULL);
+
+#else	/* ! RHAS_FORK_EXEC */
+
+	eputs(dname);
+	eputs(": no fork/exec\n");
+	return(NULL);
+
+#endif	/* ! RHAS_FORK_EXEC */
 }
 
 
-static
+static void
 comm_close()			/* done with driver */
 {
 	int	pid;
@@ -122,7 +131,7 @@ comm_close()			/* done with driver */
 }
 
 
-static
+static void
 comm_clear(xres, yres)				/* clear screen */
 int	xres, yres;
 {
@@ -133,7 +142,7 @@ int	xres, yres;
 }
 
 
-static
+static void
 comm_paintr(col, xmin, ymin, xmax, ymax)	/* paint a rectangle */
 COLOR	col;
 int	xmin, ymin, xmax, ymax;
@@ -147,7 +156,7 @@ int	xmin, ymin, xmax, ymax;
 }
 
 
-static
+static void
 comm_flush()				/* flush output to driver */
 {
 	putc(COM_FLUSH, devout);
@@ -175,7 +184,7 @@ int	*xp, *yp;
 }
 
 
-static
+static void
 comm_comout(str)			/* print string to command line */
 char	*str;
 {
@@ -186,7 +195,7 @@ char	*str;
 }
 
 
-static
+static void
 comm_comin(buf, prompt)			/* read string from command line */
 char	*buf;
 char	*prompt;
@@ -206,7 +215,7 @@ char	*prompt;
 }
 
 
-static
+static void
 mygets(s, fp)				/* get string from file (with nul) */
 register char	*s;
 register FILE	*fp;
@@ -220,7 +229,7 @@ register FILE	*fp;
 }
 
 
-static
+static void
 myputs(s, fp)				/* put string to file (with nul) */
 register char	*s;
 register FILE	*fp;
@@ -231,7 +240,7 @@ register FILE	*fp;
 }
 
 
-static
+static void
 reply_error(routine)			/* what should we do here? */
 char	*routine;
 {
@@ -241,7 +250,7 @@ char	*routine;
 }
 
 
-static
+static void
 getstate()				/* get driver state variables */
 {
 	fread((char *)&comm_driver.pixaspect,