--- ray/src/rt/persist.c	1996/07/19 10:16:00	2.17
+++ ray/src/rt/persist.c	1997/10/16 13:49:22	2.20
@@ -14,6 +14,9 @@ static char SCCSid[] = "$SunId$ LBL";
 #include "paths.h"
 #include <signal.h>
 #include <sys/types.h>
+#ifdef INCL_SEL_H
+#include <sys/select.h>
+#endif
 #include <sys/stat.h>
 					/* select call compatibility stuff */
 #ifndef FD_SETSIZE
@@ -138,9 +141,9 @@ pfhold()		/* holding pattern for idle rendering proces
 	sprintf(buf, "%s %d\n%s\n%s\n%s\n", progname, getpid(),
 			inpname, outpname, errname);
 	n = strlen(buf);
-	lseek(persistfd, 0L, 0);
 	if (write(persistfd, buf, n) < n)
 		error(SYSTEM, "error writing persist file");
+	lseek(persistfd, 0L, 0);
 				/* wait TIMELIM for someone to signal us */
 	got_io = 0;
 	signal(SIGIO, sig_io);
@@ -265,7 +268,7 @@ io_process()		/* just act as go-between for actual pro
 				goto readerr;
 			if (nr == 0) {
 				close(fderr);
-				close(2);
+				/* close(2);	don't close stderr! */
 				fderr = -1;
 			} else
 				do {		/* write it all */