61    FILE *fin, *fout;  in main()  local
99    fin = fopen(argv[argc-2], "r");  in main()
100    if(fin==NULL)  in main()
109      fclose(fin);  in main()
122          if (fread(ch, 1, 4, fin)!=4)  in main()
124              if (feof(fin))  in main()
129                 fclose(fin);  in main()
139              if (feof(fin))  in main()
144                 fclose(fin);  in main()
150          if (fread(ch, 1, 4, fin)!=4)  in main()
152              if (feof(fin))  in main()
157                 fclose(fin);  in main()
164          if (fread(packets[i], len[i], 1, fin)!=1) {  in main()
165              if (feof(fin))  in main()
170                 fclose(fin);  in main()
244    fclose(fin);  in main()