--- ray/src/util/rpiece.c	1993/10/18 13:17:47	2.27
+++ ray/src/util/rpiece.c	1994/04/11 14:44:10	2.30
@@ -148,7 +148,8 @@ 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 +187,12 @@ 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 +233,8 @@ 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);
@@ -341,6 +345,10 @@ 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)