--- ray/src/common/process.c	1993/04/01 11:08:05	2.3
+++ ray/src/common/process.c	2003/02/22 02:07:22	2.5
@@ -1,13 +1,69 @@
-/* Copyright (c) 1991 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: process.c,v 2.5 2003/02/22 02:07:22 greg Exp $";
 #endif
-
 /*
  * Routines to communicate with separate process via dual pipes
+ *
+ * External symbols declared in standard.h
  */
 
+/* ====================================================================
+ * The Radiance Software License, Version 1.0
+ *
+ * Copyright (c) 1990 - 2002 The Regents of the University of California,
+ * through Lawrence Berkeley National Laboratory.   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *         notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *
+ * 3. The end-user documentation included with the redistribution,
+ *           if any, must include the following acknowledgment:
+ *             "This product includes Radiance software
+ *                 (http://radsite.lbl.gov/)
+ *                 developed by the Lawrence Berkeley National Laboratory
+ *               (http://www.lbl.gov/)."
+ *       Alternately, this acknowledgment may appear in the software itself,
+ *       if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
+ *       and "The Regents of the University of California" must
+ *       not be used to endorse or promote products derived from this
+ *       software without prior written permission. For written
+ *       permission, please contact radiance@radsite.lbl.gov.
+ *
+ * 5. Products derived from this software may not be called "Radiance",
+ *       nor may "Radiance" appear in their name, without prior written
+ *       permission of Lawrence Berkeley National Laboratory.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.   IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of Lawrence Berkeley National Laboratory.   For more
+ * information on Lawrence Berkeley National Laboratory, please see
+ * <http://www.lbl.gov/>.
+ */
+
 				/* find pipe buffer limit */
 #include  <sys/param.h>
 
@@ -25,7 +81,11 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include  "vfork.h"
 
+#ifndef BSD
+#include  <errno.h>
+#endif
 
+
 int
 open_process(pd, av)		/* open communication to separate process */
 int	pd[3];
@@ -101,13 +161,18 @@ char	*bpos;
 int	siz;
 {
 	register int	cc = 0, nrem = siz;
-
+retry:
 	while (nrem > 0 && (cc = read(fd, bpos, nrem)) > 0) {
 		bpos += cc;
 		nrem -= cc;
 	}
-	if (cc < 0)
+	if (cc < 0) {
+#ifndef BSD
+		if (errno == EINTR)	/* we were interrupted! */
+			goto retry;
+#endif
 		return(cc);
+	}
 	return(siz-nrem);
 }
 
@@ -119,12 +184,17 @@ char	*bpos;
 int	siz;
 {
 	register int	cc = 0, nrem = siz;
-
+retry:
 	while (nrem > 0 && (cc = write(fd, bpos, nrem)) > 0) {
 		bpos += cc;
 		nrem -= cc;
 	}
-	if (cc < 0)
+	if (cc < 0) {
+#ifndef BSD
+		if (errno == EINTR)	/* we were interrupted! */
+			goto retry;
+#endif
 		return(cc);
+	}
 	return(siz-nrem);
 }