--- ray/src/util/rpiece.c	1993/10/18 13:17:47	2.27
+++ ray/src/util/rpiece.c	1995/11/30 09:26:20	2.31
@@ -1,4 +1,4 @@
-/* Copyright (c) 1993 Regents of the University of California */
+/* Copyright (c) 1995 Regents of the University of California */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
@@ -69,6 +69,7 @@ int  nforked = 0;
 
 char  *progname;
 int  verbose = 0;
+unsigned  timelim = 0;
 int  rvrlim = -1;
 
 extern long  lseek(), ftell();
@@ -120,6 +121,11 @@ char  *argv[];
 					break;
 				pixaspect = atof(argv[i+1]);
 				continue;
+			case 'T':		/* time limit (hours) */
+				if (argv[i][2])
+					break;
+				timelim = atof(argv[++i])*3600. + .5;
+				break;
 			case 'x':		/* overall x resolution */
 				if (argv[i][2])
 					break;
@@ -148,7 +154,8 @@ char  *argv[];
 			case 'F':		/* syncronization file */
 				if (argv[i][2])
 					break;
-				if ((syncfp = fopen(argv[++i],"r+")) == NULL) {
+				if ((syncfp =
+		fdopen(open(argv[++i],O_RDWR|O_CREAT,0666),"r+")) == NULL) {
 					fprintf(stderr, "%s: cannot open\n",
 							argv[i]);
 					exit(1);
@@ -186,10 +193,12 @@ int  fd;
 int  ltyp;
 {
 	static struct flock  fls;	/* static so initialized to zeroes */
+	extern char  *sys_errlist[];
 
 	fls.l_type = ltyp;
 	if (fcntl(fd, F_SETLKW, &fls) < 0) {
-		fprintf(stderr, "%s: cannot lock/unlock file\n", progname);
+		fprintf(stderr, "%s: cannot lock/unlock file: %s\n",
+				progname, sys_errlist[errno]);
 		exit(1);
 	}
 }
@@ -230,7 +239,8 @@ char  **av;
 		dolock(outfd, F_WRLCK);
 		if ((fp = fdopen(dup(outfd), "w")) == NULL)
 			goto filerr;
-		printargs(ac, av, fp);		/* write header */
+		newheader("RADIANCE", fp);	/* create header */
+		printargs(ac, av, fp);
 		fprintf(fp, "SOFTWARE= %s\n", VersionID);
 		fputs(VIEWSTR, fp);
 		fprintview(&ourview, fp);
@@ -276,6 +286,8 @@ char  **av;
 		exit(1);
 	}
 	signal(SIGALRM, onalrm);
+	if (timelim)
+		alarm(timelim);
 	return;
 filerr:
 	fprintf(stderr, "%s: i/o error on file \"%s\"\n", progname, outfile);
@@ -341,6 +353,10 @@ register int  *xp, *yp;
 		return(0);		/* only check if asked */
 	if (pdone == NULL)		/* first call */
 		pdone = calloc(hmult*vmult, sizeof(char));
+	if (pdone == NULL) {
+		fprintf(stderr, "%s: out of memory\n", progname);
+		exit(1);
+	}
 	if (readpos != -1)		/* mark what's been done */
 		fseek(syncfp, readpos, 0);
 	while (fscanf(syncfp, "%d %d", xp, yp) == 2)