409   int argn;  in main()  local
427   for (argn = 1; argn < argc; argn++) {  in main()
428     arg = argv[argn];  in main()
435       if (++argn >= argc) usage();  in main()
436       if ((comment_file = fopen(argv[argn], "r")) == NULL) {  in main()
437         fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);  in main()
441       if (++argn >= argc) usage();  in main()
442       comment_arg = argv[argn];  in main()
450         if (strlen(argv[argn]) + 2 >= (size_t)MAX_COM_LENGTH) {  in main()
455         strcpy(comment_arg, argv[argn] + 1);  in main()
462           if (++argn >= argc)  in main()
464           if (strlen(comment_arg) + strlen(argv[argn]) + 2 >=  in main()
471           strcat(comment_arg, argv[argn]);  in main()
473       } else if (strlen(argv[argn]) >= (size_t)MAX_COM_LENGTH) {  in main()
489   if (comment_arg == NULL && comment_file == NULL && argn >= argc)  in main()
493   if (argn < argc) {  in main()
494     if ((infile = fopen(argv[argn], READ_BINARY)) == NULL) {  in main()
495       fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);  in main()
516   if (argn != argc - 2) {  in main()
520   if ((outfile = fopen(argv[argn + 1], WRITE_BINARY)) == NULL) {  in main()
521     fprintf(stderr, "%s: can't open %s\n", progname, argv[argn + 1]);  in main()
526   if (argn < argc - 1) {  in main()