--- ray/src/util/rad.c	2023/11/16 23:37:29	2.132
+++ ray/src/util/rad.c	2025/06/03 21:31:51	2.134
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rad.c,v 2.132 2023/11/16 23:37:29 greg Exp $";
+static const char	RCSid[] = "$Id: rad.c,v 2.134 2025/06/03 21:31:51 greg Exp $";
 #endif
 /*
  * Executive program for oconv, rpict and pfilt
@@ -131,6 +131,7 @@ char	*viewselect = NULL;	/* specific view only */
 
 #define DEF_RPICT_PATH	"rpict"		/* default rpict path */
 
+#define R_CMDMAX	(5*PATH_MAX+512)
 				/* command paths */
 char	c_oconv[256] = "oconv";
 char	c_mkillum[256] = "mkillum";
@@ -144,7 +145,6 @@ int	overture = 0;		/* overture calculation needed */
 
 int	children_running = 0;	/* set negative in children */
 
-char	*progname;		/* global argv[0] */
 char	*rifname;		/* global rad input file name */
 
 char	radname[PATH_MAX];	/* root Radiance file name */
@@ -197,8 +197,8 @@ main(
 	char	ropts[512];
 	char	popts[64];
 	int	i;
-
-	progname = argv[0];
+				/* set global progname */
+	fixargv0(argv[0]);
 				/* get options */
 	for (i = 1; i < argc && argv[i][0] == '-'; i++)
 		switch (argv[i][1]) {
@@ -528,7 +528,7 @@ static void
 oconv(void)				/* run oconv and mkillum if necessary */
 {
 	static char	illumtmp[] = "ilXXXXXX";
-	char	combuf[PATH_MAX], ocopts[64], mkopts[1024];
+	char	combuf[R_CMDMAX], ocopts[64], mkopts[1024];
 
 	oconvopts(ocopts);		/* get options */
 	if (octreedate < scenedate) {	/* check date on original octree */
@@ -1415,7 +1415,7 @@ rvu(				/* run rvu with first view */
 )
 {
 	char	*vw;
-	char	combuf[PATH_MAX];
+	char	combuf[R_CMDMAX];
 					/* build command */
 	if (touchonly || (vw = getview(0, NULL)) == NULL)
 		return;