61    FILE *fin, *fout;  in main()  local
105    fout = fopen(argv[argc-1], "w");  in main()
106    if(fout==NULL)  in main()
133                 fclose(fout);  in main()
164             if(fwrite(int_field, 1, 4, fout)!=4){  in main()
169             if (fwrite(int_field, 1, 4, fout)!=4) {  in main()
173             if (fwrite(output_packet, 1, err, fout)!=(unsigned)err) {  in main()
189                if (fwrite(int_field, 1, 4, fout)!=4) {  in main()
197                if (fwrite(int_field, 1, 4, fout)!=4) {  in main()
201                if (fwrite(output_packet, 1, err, fout)!=(unsigned)err) {  in main()
215    fclose(fout);  in main()