--- ray/src/rt/persist.c	1996/07/19 10:16:00	2.17
+++ ray/src/rt/persist.c	1997/10/28 14:00:02	2.21
@@ -12,23 +12,9 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #ifdef F_SETLKW
 #include "paths.h"
+#include "selcall.h"
 #include <signal.h>
-#include <sys/types.h>
 #include <sys/stat.h>
-					/* select call compatibility stuff */
-#ifndef FD_SETSIZE
-#include <sys/param.h>
-#define FD_SETSIZE	NOFILE		/* maximum # select file descriptors */
-#endif
-#ifndef FD_SET
-#ifndef NFDBITS
-#define NFDBITS		(8*sizeof(int))	/* number of bits per fd_mask */
-#endif
-#define	FD_SET(n, p)	((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
-#define	FD_CLR(n, p)	((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
-#define	FD_ISSET(n, p)	((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
-#define FD_ZERO(p)	bzero((char *)(p), sizeof(*(p)))
-#endif
 
 #ifndef TIMELIM
 #define TIMELIM		(8*3600)	/* time limit for holding pattern */
@@ -138,9 +124,9 @@ 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 +251,7 @@ 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 */