--- ray/src/px/pinterp.c	1993/04/01 11:21:18	2.10
+++ ray/src/px/pinterp.c	1994/02/27 10:16:57	2.13
@@ -197,6 +197,8 @@ char	*argv[];
 	if (ourpict == NULL || ourzbuf == NULL)
 		syserror(progname);
 	bzero((char *)ourzbuf, hresolu*vresolu*sizeof(float));
+							/* new header */
+	newheader("RADIANCE", stdout);
 							/* get input */
 	for ( ; i < argc; i += 2)
 		addpicture(argv[i], argv[i+1]);
@@ -241,8 +243,9 @@ char	*s;
 {
 	char	fmt[32];
 
-	if (isformat(s)) {
-		formatval(fmt, s);
+	if (isheadid(s))
+		return;
+	if (formatval(fmt, s)) {
 		wrongformat = strcmp(fmt, COLRFMT);
 		return;
 	}
@@ -303,7 +306,6 @@ char	*pfile, *zspec;
 		register int	x;
 		if (!isfloat(zspec) || (zvalue = atof(zspec)) <= 0.0)
 			syserror(zspec);
-			exit(1);
 		for (x = scanlen(&tresolu); x-- > 0; )
 			zin[x] = zvalue;
 	}
@@ -696,14 +698,14 @@ char	*prog, *args;
 	cp = combuf;
 	wp = argv;
 	for ( ; ; ) {
-		while (isspace(*cp)) cp++;
-		if (!*cp) break;
-		*wp++ = cp;
-		while (!isspace(*cp))
-			if (!*cp++) goto done;
-		*cp++ = '\0';
+		while (isspace(*cp))	/* nullify spaces */
+			*cp++ = '\0';
+		if (!*cp)		/* all done? */
+			break;
+		*wp++ = cp;		/* add argument to list */
+		while (*++cp && !isspace(*cp))
+			;
 	}
-done:
 	*wp = NULL;
 						/* start process */
 	if ((rval = open_process(PDesc, argv)) < 0)