aboutsummaryrefslogblamecommitdiffstats
path: root/lib/kernel/test/file_SUITE.erl
blob: 0e84cae7caeb800be0a70de357208f3b98a3c825 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939

                   


                                                        




                                                                      
  



                                                                         
  

























                                                                    

                                                                    
                                                 
                                      
                                                  



                                                         
                                                                
                                                              
                                                                      
                                                            
                                                              
                                                              

                      
                                       



                                                                    
                                                                   


















                                                                          

                    

                                       






                                                           
                                                    



                                        

                                                
         






                                                            


                                                      






















                                                              
 
                                     
           

                                    
           
 
 
                                              















                                                                     
                                             











                                                               
                                  


































                                                                      














































































                                                                      



























































                                                                       






































                                                                           



                                                        






































































































                                                                      
 




















































































































































































































































































































































































                                                                           















                                                                        

                                                                      


























































































                                                                        








































































































































































































































































                                                                               



























































                                                                           







































































                                                                                








































































































                                                                              























                                                                              






















                                                                      






































































                                                                          






























































































































                                                                      































































































































































































































































                                                                            




































































































































































































































































































                                                                               















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































                                                                               
                                              








                                                       
                                                                       










                                                                          
                                                





































                                                                










                                                                      

















































































































































































































































                                                                               
                                                              





















































































































































































































































































































































                                                                                        
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2010. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%

%% This is a developement feature when developing a new file module,
%% ugly but practical.
-ifndef(FILE_MODULE).
-define(FILE_MODULE, file).
-endif.
-ifndef(FILE_SUITE).
-define(FILE_SUITE, file_SUITE).
-endif.
-ifndef(FILE_INIT).
-define(FILE_INIT(Config), Config).
-endif.
-ifndef(FILE_FINI).
-define(FILE_FINI(Config), Config).
-endif.
-ifndef(FILE_INIT_PER_TESTCASE).
-define(FILE_INIT_PER_TESTCASE(Config), Config).
-endif.
-ifndef(FILE_FIN_PER_TESTCASE).
-define(FILE_FIN_PER_TESTCASE(Config), Config).
-endif.

-module(?FILE_SUITE).

-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
	 init_per_group/2,end_per_group/2,
	 init_per_testcase/2, end_per_testcase/2,
	 read_write_file/1, names/1]).
-export([cur_dir_0/1, cur_dir_1/1, make_del_dir/1,
	 pos1/1, pos2/1]).
-export([close/1, consult1/1, path_consult/1, delete/1]).
-export([ eval1/1, path_eval/1, script1/1, path_script/1,
	 open1/1,
	 old_modes/1, new_modes/1, path_open/1, open_errors/1]).
-export([ file_info_basic_file/1, file_info_basic_directory/1,
	 file_info_bad/1, file_info_times/1, file_write_file_info/1]).
-export([rename/1, access/1, truncate/1, datasync/1, sync/1,
	 read_write/1, pread_write/1, append/1, exclusive/1]).
-export([ e_delete/1, e_rename/1, e_make_dir/1, e_del_dir/1]).
-export([otp_5814/1]).

-export([ read_not_really_compressed/1,
	 read_compressed_cooked/1, read_compressed_cooked_binary/1,
	 read_cooked_tar_problem/1,
	 write_compressed/1, compress_errors/1, catenated_gzips/1]).

-export([ make_link/1, read_link_info_for_non_link/1, symlinks/1]).

-export([copy/1]).

-export([new_slave/2, old_slave/2, run_test/2]).

-export([delayed_write/1, read_ahead/1, segment_read/1, segment_write/1]).

-export([ipread/1]).

-export([pid2name/1]).

-export([interleaved_read_write/1]).

-export([altname/1]).

-export([large_file/1]).

-export([read_line_1/1, read_line_2/1, read_line_3/1,read_line_4/1]).

-export([advise/1]).

-export([standard_io/1,mini_server/1]).

%% Debug exports
-export([create_file_slow/2, create_file/2, create_bin/2]).
-export([verify_file/2, verify_bin/3]).
-export([bytes/2, iterate/3]).



-include_lib("test_server/include/test_server.hrl").
-include_lib("kernel/include/file.hrl").



suite() -> [{suite_callbacks,[ts_install_scb]}].

all() -> 
    [altname, read_write_file, {group, dirs},
     {group, files}, delete, rename, names, {group, errors},
     {group, compression}, {group, links}, copy,
     delayed_write, read_ahead, segment_read, segment_write,
     ipread, pid2name, interleaved_read_write, otp_5814,
     large_file, read_line_1, read_line_2, read_line_3,
     read_line_4, standard_io].

groups() -> 
    [{dirs, [], [make_del_dir, cur_dir_0, cur_dir_1]},
     {files, [],
      [{group, open}, {group, pos}, {group, file_info},
       {group, consult}, {group, eval}, {group, script},
       truncate, sync, datasync, advise]},
     {open, [],
      [open1, old_modes, new_modes, path_open, close, access,
       read_write, pread_write, append, open_errors,
       exclusive]},
     {pos, [], [pos1, pos2]},
     {file_info, [],
      [file_info_basic_file, file_info_basic_directory,
       file_info_bad, file_info_times, file_write_file_info]},
     {consult, [], [consult1, path_consult]},
     {eval, [], [eval1, path_eval]},
     {script, [], [script1, path_script]},
     {errors, [],
      [e_delete, e_rename, e_make_dir, e_del_dir]},
     {compression, [],
      [read_compressed_cooked, read_compressed_cooked_binary,
       read_cooked_tar_problem, read_not_really_compressed,
       write_compressed, compress_errors, catenated_gzips]},
     {links, [],
      [make_link, read_link_info_for_non_link, symlinks]}].

init_per_group(_GroupName, Config) ->
    Config.

end_per_group(_GroupName, Config) ->
    Config.


init_per_suite(Config) when is_list(Config) ->
    case os:type() of
	{win32, _} ->
	    Priv = ?config(priv_dir, Config),
	    HasAccessTime =
		case ?FILE_MODULE:read_file_info(Priv) of
		    {ok, #file_info{atime={_, {0, 0, 0}}}} ->
			%% This is a unfortunately a FAT file system.
			[no_access_time];
		    {ok, _} ->
			[]
		end,
	    ?FILE_INIT(HasAccessTime++Config);
	_ ->
	    ?FILE_INIT(Config)
    end.

end_per_suite(Config) when is_list(Config) ->
    case os:type() of
	{win32, _} ->
	    os:cmd("subst z: /d");
	_ ->
	    ok
    end,
    ?FILE_FINI(Config).

init_per_testcase(_Func, Config) ->
    %%error_logger:info_msg("~p:~p *****~n", [?MODULE, _Func]),
    ?FILE_INIT_PER_TESTCASE(Config).

end_per_testcase(_Func, Config) ->
    %% error_logger:info_msg("~p:~p END *****~n", [?MODULE, _Func]),
    ?FILE_FIN_PER_TESTCASE(Config).

%% Matches a term (the last) against alternatives
expect(X, _, X) ->
    X;
expect(_, X, X) ->
    X.

expect(X, _, _, X) ->
    X;
expect(_, X, _, X) ->
    X;
expect(_, _, X, X) ->
    X.

expect(X, _, _, _, X) ->
    X;
expect(_, X, _, _, X) ->
    X;
expect(_, _, X, _, X) ->
    X;
expect(_, _, _, X, X) ->
    X.

%% Calculate the time difference
time_dist({YY, MM, DD, H, M, S}, DT) ->
    time_dist({{YY, MM, DD}, {H, M, S}}, DT);
time_dist(DT, {YY, MM, DD, H, M, S}) ->
    time_dist(DT, {{YY, MM, DD}, {H, M, S}});
time_dist({_D1, _T1} = DT1, {_D2, _T2} = DT2) ->
    calendar:datetime_to_gregorian_seconds(DT2)
	- calendar:datetime_to_gregorian_seconds(DT1).

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
mini_server(Parent) ->
    receive
	die ->
	    ok;
	{io_request,From,To,{put_chars,Data}} ->
	    Parent ! {io_request,From,To,{put_chars,Data}},
	    From ! {io_reply, To, ok},
	    mini_server(Parent);
	{io_request,From,To,{get_chars,'',N}} ->
	    Parent ! {io_request,From,To,{get_chars,'',N}},
	    From ! {io_reply, To, {ok, lists:duplicate(N,$a)}},
	    mini_server(Parent);
	{io_request,From,To,{get_line,''}} ->
	    Parent ! {io_request,From,To,{get_line,''}},
	    From ! {io_reply, To, {ok, "hej\n"}},
	    mini_server(Parent)
    end.

standard_io(suite) ->
    [];
standard_io(doc) ->
    ["Test that standard i/o-servers work with file module"];
standard_io(Config) when is_list(Config) ->
    %% Really just a smoke test
    ?line Pid = spawn(?MODULE,mini_server,[self()]),
    ?line register(mini_server,Pid),
    ?line ok = file:write(mini_server,<<"hej\n">>),
    ?line receive
	     {io_request,_,_,{put_chars,<<"hej\n">>}} ->
		  ok
	  after 1000 ->
		  exit(noreply)
	  end,
    ?line {ok,"aaaaa"} = file:read(mini_server,5),
    ?line receive
	     {io_request,_,_,{get_chars,'',5}} ->
		  ok
	  after 1000 ->
		  exit(noreply)
	  end,
    ?line {ok,"hej\n"} = file:read_line(mini_server),
    ?line receive
	     {io_request,_,_,{get_line,''}} ->
		  ok
	  after 1000 ->
		  exit(noreply)
	  end,
    ?line OldGL = group_leader(),
    ?line group_leader(Pid,self()),
    ?line ok = file:write(standard_io,<<"hej\n">>),
    ?line group_leader(OldGL,self()),
    ?line receive
	     {io_request,_,_,{put_chars,<<"hej\n">>}} ->
		  ok
	  after 1000 ->
		  exit(noreply)
	  end,
    ?line group_leader(Pid,self()),
    ?line {ok,"aaaaa"} = file:read(standard_io,5),
    ?line group_leader(OldGL,self()),
    ?line receive
	     {io_request,_,_,{get_chars,'',5}} ->
		  ok
	  after 1000 ->
		  exit(noreply)
	  end,
    ?line group_leader(Pid,self()),
    ?line {ok,"hej\n"} = file:read_line(standard_io),
    ?line group_leader(OldGL,self()),
    ?line receive
	     {io_request,_,_,{get_line,''}} ->
		  ok
	  after 1000 ->
		  exit(noreply)
	  end,
    Pid ! die,
    receive after 1000 -> ok end.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

read_write_file(suite) -> [];
read_write_file(doc) -> [];
read_write_file(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_read_write_file"),

    %% Try writing and reading back some term
    ?line SomeTerm = {"This term",{will,be},[written,$t,$o],1,file,[]},
    ?line ok = ?FILE_MODULE:write_file(Name,term_to_binary(SomeTerm)),
    ?line {ok,Bin1} = ?FILE_MODULE:read_file(Name),
    ?line SomeTerm = binary_to_term(Bin1),
  
    %% Try a "null" term
    ?line NullTerm = [],
    ?line ok = ?FILE_MODULE:write_file(Name,term_to_binary(NullTerm)),
    ?line {ok,Bin2} = ?FILE_MODULE:read_file(Name),
    ?line NullTerm = binary_to_term(Bin2),

    %% Try some "complicated" types
    ?line BigNum = 123456789012345678901234567890,
    ?line ComplTerm = {self(),make_ref(),BigNum,3.14159},
    ?line ok = ?FILE_MODULE:write_file(Name,term_to_binary(ComplTerm)),
    ?line {ok,Bin3} = ?FILE_MODULE:read_file(Name),
    ?line ComplTerm = binary_to_term(Bin3),

    %% Try reading a nonexistent file
    ?line Name2 = filename:join(RootDir, 
				atom_to_list(?MODULE)
				++"_nonexistent_file"),
    ?line {error, enoent} = ?FILE_MODULE:read_file(Name2),
    ?line {error, enoent} = ?FILE_MODULE:read_file(""),
    ?line {error, enoent} = ?FILE_MODULE:read_file(''),

    % Try writing to a bad filename
    ?line {error, enoent} = 
	?FILE_MODULE:write_file("",term_to_binary(NullTerm)),

    % Try writing something else than a binary
    ?line {error, badarg} = ?FILE_MODULE:write_file(Name,{1,2,3}),
    ?line {error, badarg} = ?FILE_MODULE:write_file(Name,self()),

    %% Some non-term binaries
    ?line ok = ?FILE_MODULE:write_file(Name,[]),
    ?line {ok,Bin4} = ?FILE_MODULE:read_file(Name),
    ?line 0 = byte_size(Bin4),

    ?line ok = ?FILE_MODULE:write_file(Name,[Bin1,[],[[Bin2]]]),
    ?line {ok,Bin5} = ?FILE_MODULE:read_file(Name),
    ?line {Bin1,Bin2} = split_binary(Bin5,byte_size(Bin1)),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


make_del_dir(suite) -> [];
make_del_dir(doc) -> [];
make_del_dir(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_mk-dir"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    ?line {error, eexist} = ?FILE_MODULE:make_dir(NewDir),
    ?line ok = ?FILE_MODULE:del_dir(NewDir),
    ?line {error, enoent} = ?FILE_MODULE:del_dir(NewDir),

    %% Check that we get an error when trying to create...
    %% a deep directory
    ?line NewDir2 = filename:join(RootDir, 
				  atom_to_list(?MODULE)
				  ++"_mk-dir/foo"),
    ?line {error, enoent} = ?FILE_MODULE:make_dir(NewDir2),
    %% a nameless directory
    ?line {error, enoent} = ?FILE_MODULE:make_dir(""),
    %% a directory with illegal name
    ?line {error, badarg} = ?FILE_MODULE:make_dir({1,2,3}),

    %% a directory with illegal name, even if it's a (bad) list
    ?line {error, badarg} = ?FILE_MODULE:make_dir([1,2,3,{}]),

    %% Maybe this isn't an error, exactly, but worth mentioning anyway:
    %% ok = ?FILE_MODULE:make_dir([$f,$o,$o,0,$b,$a,$r])),
    %% The above line works, and created a directory "./foo"
    %% More elegant would maybe have been to fail, or to really create
    %% a directory, but with a name that incorporates the "bar" part of
    %% the list, so that [$f,$o,$o,0,$f,$o,$o] wouldn't refer to the same
    %% dir. But this would slow it down.

    %% Try deleting some bad directories
    %% Deleting the parent directory to the current, sounds dangerous, huh?
    %% Don't worry ;-) the parent directory should never be empty, right?
    case ?FILE_MODULE:del_dir('..') of
	{error, eexist} -> ok;
	{error, einval} -> ok			%FreeBSD
    end,
    ?line {error, enoent} = ?FILE_MODULE:del_dir(""),
    ?line {error, badarg} = ?FILE_MODULE:del_dir([3,2,1,{}]),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

cur_dir_0(suite) -> [];
cur_dir_0(doc) -> [];
cur_dir_0(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    %% Find out the current dir, and cd to it ;-)
    ?line {ok,BaseDir} = ?FILE_MODULE:get_cwd(),
    ?line Dir1 = BaseDir ++ "", %% Check that it's a string
    ?line ok = ?FILE_MODULE:set_cwd(Dir1),

    %% Make a new dir, and cd to that
    ?line RootDir = ?config(priv_dir,Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_curdir"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    ?line io:format("cd to ~s",[NewDir]),
    ?line ok = ?FILE_MODULE:set_cwd(NewDir),

    %% Create a file in the new current directory, and check that it
    %% really is created there
    ?line UncommonName = "uncommon.fil",
    ?line {ok,Fd} = ?FILE_MODULE:open(UncommonName,read_write),
    ?line ok = ?FILE_MODULE:close(Fd),
    ?line {ok,NewDirFiles} = ?FILE_MODULE:list_dir("."),
    ?line true = lists:member(UncommonName,NewDirFiles),

    %% Delete the directory and return to the old current directory
    %% and check that the created file isn't there (too!)
    ?line expect({error, einval}, {error, eacces}, 
		 ?FILE_MODULE:del_dir(NewDir)),
    ?line ?FILE_MODULE:delete(UncommonName),
    ?line {ok,[]} = ?FILE_MODULE:list_dir("."),
    ?line ok = ?FILE_MODULE:set_cwd(Dir1),
    ?line io:format("cd back to ~s",[Dir1]),
    ?line ok = ?FILE_MODULE:del_dir(NewDir),
    ?line {error, enoent} = ?FILE_MODULE:set_cwd(NewDir),
    ?line ok = ?FILE_MODULE:set_cwd(Dir1),
    ?line io:format("cd back to ~s",[Dir1]),
    ?line {ok,OldDirFiles} = ?FILE_MODULE:list_dir("."),
    ?line false = lists:member(UncommonName,OldDirFiles),

    %% Try doing some bad things
    ?line {error, badarg} = ?FILE_MODULE:set_cwd({foo,bar}),
    ?line {error, enoent} = ?FILE_MODULE:set_cwd(""),
    ?line {error, enoent} = ?FILE_MODULE:set_cwd(".......a......"),
    ?line {ok,BaseDir} = ?FILE_MODULE:get_cwd(), %% Still there?

    %% On Windows, there should only be slashes, no backslashes,
    %% in the return value of get_cwd().
    %% (The test is harmless on Unix, because filenames usually
    %% don't contain backslashes.)

    ?line {ok, BaseDir} = ?FILE_MODULE:get_cwd(),
    ?line false = lists:member($\\, BaseDir),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%% Tests ?FILE_MODULE:get_cwd/1.

cur_dir_1(suite) -> [];
cur_dir_1(doc) -> [];
cur_dir_1(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),

    ?line case os:type() of
	      {unix, _} ->
		  ?line {error, enotsup} = ?FILE_MODULE:get_cwd("d:");
	      vxworks ->
		  ?line {error, enotsup} = ?FILE_MODULE:get_cwd("d:");
	      {win32, _} ->
		  win_cur_dir_1(Config)
	  end,
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.
	
win_cur_dir_1(_Config) ->
    ?line {ok,BaseDir} = ?FILE_MODULE:get_cwd(),

    %% Get the drive letter from the current directory,
    %% and try to get current directory for that drive.

    ?line [Drive,$:|_] = BaseDir,
    ?line {ok,BaseDir} = ?FILE_MODULE:get_cwd([Drive,$:]),
    io:format("BaseDir = ~s\n", [BaseDir]),

    %% Unfortunately, there is no way to move away from the
    %% current drive as we can't use the "subst" command from
    %% a SSH connection. We can't test any more.

    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



open1(suite) -> [];
open1(doc) -> [];
open1(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_files"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    ?line Name = filename:join(NewDir, "foo1.fil"),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,read_write),
    ?line {ok,Fd2} = ?FILE_MODULE:open(Name,read),
    ?line Str = "{a,tuple}.\n",
    ?line io:format(Fd1,Str,[]),
    ?line {ok,0} = ?FILE_MODULE:position(Fd1,bof),
    ?line Str = io:get_line(Fd1,''),
    ?line Str = io:get_line(Fd2,''),
    ?line ok = ?FILE_MODULE:close(Fd2),
    ?line {ok,0} = ?FILE_MODULE:position(Fd1,bof),
    ?line ok = ?FILE_MODULE:truncate(Fd1),
    ?line eof = io:get_line(Fd1,''),
    ?line ok = ?FILE_MODULE:close(Fd1),
    ?line {ok,Fd3} = ?FILE_MODULE:open(Name,read),
    ?line eof = io:get_line(Fd3,''),
    ?line ok = ?FILE_MODULE:close(Fd3),
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%% Tests all open modes.

old_modes(suite) -> [];
old_modes(doc) -> [];
old_modes(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_old_open_modes"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    ?line Name1 = filename:join(NewDir, "foo1.fil"),
    ?line Marker = "hello, world",

    %% write
    ?line {ok, Fd1} = ?FILE_MODULE:open(Name1, write),
    ?line ok = io:write(Fd1, Marker),
    ?line ok = io:put_chars(Fd1, ".\n"),
    ?line ok = ?FILE_MODULE:close(Fd1),

    %% read
    ?line {ok, Fd2} = ?FILE_MODULE:open(Name1, read),
    ?line {ok, Marker} = io:read(Fd2, prompt),
    ?line ok = ?FILE_MODULE:close(Fd2),

    %% read_write
    ?line {ok, Fd3} = ?FILE_MODULE:open(Name1, read_write),
    ?line {ok, Marker} = io:read(Fd3, prompt),
    ?line ok = io:write(Fd3, Marker),
    ?line ok = ?FILE_MODULE:close(Fd3),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.


new_modes(suite) -> [];
new_modes(doc) -> [];
new_modes(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_new_open_modes"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    ?line Name1 = filename:join(NewDir, "foo1.fil"),
    ?line Marker = "hello, world",

    %% write
    ?line {ok, Fd1} = ?FILE_MODULE:open(Name1, [write]),
    ?line ok = io:write(Fd1, Marker),
    ?line ok = io:put_chars(Fd1, ".\n"),
    ?line ok = ?FILE_MODULE:close(Fd1),

    %% read
    ?line {ok, Fd2} = ?FILE_MODULE:open(Name1, [read]),
    ?line {ok, Marker} = io:read(Fd2, prompt),
    ?line ok = ?FILE_MODULE:close(Fd2),

    %% read and write
    ?line {ok, Fd3} = ?FILE_MODULE:open(Name1, [read, write]),
    ?line {ok, Marker} = io:read(Fd3, prompt),
    ?line ok = io:write(Fd3, Marker),
    ?line ok = ?FILE_MODULE:close(Fd3),

    %% read by default
    ?line {ok, Fd4} = ?FILE_MODULE:open(Name1, []),
    ?line {ok, Marker} = io:read(Fd4, prompt),
    ?line ok = ?FILE_MODULE:close(Fd4),

    %% read and binary
    ?line {ok, Fd5} = ?FILE_MODULE:open(Name1, [read, binary]),
    ?line {ok, Marker} = io:read(Fd5, prompt),
    ?line ok = ?FILE_MODULE:close(Fd5),

    %% read, raw
    ?line {ok, Fd6} = ?FILE_MODULE:open(Name1, [read, raw]),
    ?line {ok, [$\[]} = ?FILE_MODULE:read(Fd6, 1),
    ?line ok = ?FILE_MODULE:close(Fd6),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

path_open(suite) -> [];
path_open(doc) -> [];
path_open(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_path_open"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    ?line FileName = "path_open.fil",
    ?line Name = filename:join(RootDir, FileName),
    ?line {ok,Fd1,_FullName1} =
	?FILE_MODULE:path_open(
	  [RootDir,
	   "nosuch1",
	   NewDir],FileName,write),
    ?line io:format(Fd1,"ABCDEFGH",[]),
    ?line ok = ?FILE_MODULE:close(Fd1),

    %% locate it in the last dir
    ?line {ok,Fd2,_FullName2} =
	?FILE_MODULE:path_open(
	  ["nosuch1",
	   NewDir,
	   RootDir],FileName,read),
    ?line {ok,2} = 
	?FILE_MODULE:position(Fd2,2), "C" = io:get_chars(Fd2,'',1),
    ?line ok = ?FILE_MODULE:close(Fd2),
    %% Try a failing path
    ?line {error, enoent} = ?FILE_MODULE:path_open(
			      ["nosuch1",
			       NewDir],FileName,read),
    %% Check that it's found regardless of path, if an absolute name given
    ?line {ok,Fd3,_FullPath3} =
	?FILE_MODULE:path_open(
	  ["nosuch1",
	   NewDir],Name,read),
    ?line {ok,2} = 
	?FILE_MODULE:position(Fd3,2), "C" = io:get_chars(Fd3,'',1),
    ?line ok = ?FILE_MODULE:close(Fd3),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

close(suite) -> [];
close(doc) -> [];
close(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_close.fil"),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,read_write),
    %% Just closing it is no fun, we did that a million times already
    %% This is a common error, for code written before Erlang 4.3
    %% bacause then ?FILE_MODULE:open just returned a Pid, and not everyone
    %% really checked what they got.
    ?line {'EXIT',_Msg} = (catch ok = ?FILE_MODULE:close({ok,Fd1})),
    ?line ok = ?FILE_MODULE:close(Fd1),

    %% Try closing one more time
    ?line Val = ?FILE_MODULE:close(Fd1),
    ?line io:format("Second close gave: ~p",[Val]),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

access(suite) -> [];
access(doc) -> [];
access(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_access.fil"),
    ?line Str = "ABCDEFGH",
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,write),
    ?line io:format(Fd1,Str,[]),
    ?line ok = ?FILE_MODULE:close(Fd1),
    %% Check that we can't write when in read only mode
    ?line {ok,Fd2} = ?FILE_MODULE:open(Name,read),
    ?line case catch io:format(Fd2,"XXXX",[]) of
	      ok ->
		  test_server:fail({format,write});
	      _ ->
		  ok
	  end,
    ?line ok = ?FILE_MODULE:close(Fd2),
    ?line {ok,Fd3} = ?FILE_MODULE:open(Name,read),
    ?line Str = io:get_line(Fd3,''),
    ?line ok = ?FILE_MODULE:close(Fd3),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%% Tests ?FILE_MODULE:read/2 and ?FILE_MODULE:write/2.

read_write(suite) -> [];
read_write(doc) -> [];
read_write(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_read_write"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    ?line Marker = "hello, world",
    ?line MarkerB = list_to_binary(Marker),

    %% Plain file.
    ?line Name1 = filename:join(NewDir, "plain.fil"),
    ?line {ok, Fd1} = ?FILE_MODULE:open(Name1, [read, write]),
    ?line read_write_test(Fd1, Marker, []),

    %% Raw file.
    ?line Name2 = filename:join(NewDir, "raw.fil"),
    ?line {ok, Fd2} = ?FILE_MODULE:open(Name2, [read, write, raw]),
    ?line read_write_test(Fd2, Marker, []),

    %% Plain binary file.
    ?line Name3 = filename:join(NewDir, "plain-b.fil"),
    ?line {ok, Fd3} = ?FILE_MODULE:open(Name3, [read, write, binary]),
    ?line read_write_test(Fd3, MarkerB, <<>>),

    %% Raw binary file.
    ?line Name4 = filename:join(NewDir, "raw-b.fil"),
    ?line {ok, Fd4} = ?FILE_MODULE:open(Name4, [read, write, raw, binary]),
    ?line read_write_test(Fd4, MarkerB, <<>>),

    ?line test_server:timetrap_cancel(Dog),
    ok.

read_write_test(File, Marker, Empty) ->
    ?line ok = ?FILE_MODULE:write(File, Marker),
    ?line {ok, 0} = ?FILE_MODULE:position(File, 0),
    ?line {ok, Empty} = ?FILE_MODULE:read(File, 0),
    ?line {ok, Marker} = ?FILE_MODULE:read(File, 100),
    ?line eof = ?FILE_MODULE:read(File, 100),
    ?line {ok, Empty} = ?FILE_MODULE:read(File, 0),
    ?line ok = ?FILE_MODULE:close(File),
    ?line [] = flush(),
    ok.


%% Tests ?FILE_MODULE:pread/2 and ?FILE_MODULE:pwrite/2.

pread_write(suite) -> [];
pread_write(doc) -> [];
pread_write(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_pread_write"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    ?line List = "hello, world",
    ?line Bin = list_to_binary(List),

    %% Plain file.
    ?line Name1 = filename:join(NewDir, "plain.fil"),
    ?line {ok, Fd1} = ?FILE_MODULE:open(Name1, [read, write]),
    ?line pread_write_test(Fd1, List),

    %% Raw file.
    ?line Name2 = filename:join(NewDir, "raw.fil"),
    ?line {ok, Fd2} = ?FILE_MODULE:open(Name2, [read, write, raw]),
    ?line pread_write_test(Fd2, List),

    %% Plain file. Binary mode.
    ?line Name3 = filename:join(NewDir, "plain-binary.fil"),
    ?line {ok, Fd3} = ?FILE_MODULE:open(Name3, [binary, read, write]),
    ?line pread_write_test(Fd3, Bin),

    %% Raw file. Binary mode.
    ?line Name4 = filename:join(NewDir, "raw-binary.fil"),
    ?line {ok, Fd4} = ?FILE_MODULE:open(Name4, [binary, read, write, raw]),
    ?line pread_write_test(Fd4, Bin),

    ?line test_server:timetrap_cancel(Dog),
    ok.

pread_write_test(File, Data) ->
    ?line io:format("~p:pread_write_test(~p,~p)~n", [?MODULE, File, Data]),
    ?line Size = if is_binary(Data) -> byte_size(Data);
		    is_list(Data) -> length(Data)
		 end,
    ?line I = Size + 17,
    ?line ok = ?FILE_MODULE:pwrite(File, 0, Data),
    Res = ?FILE_MODULE:pread(File, 0, I),
    ?line {ok, Data} = Res,
    ?line eof = ?FILE_MODULE:pread(File, I, 1),
    ?line ok = ?FILE_MODULE:pwrite(File, [{0, Data}, {I, Data}]),
    ?line {ok, [Data, eof, Data]} = 
	?FILE_MODULE:pread(File, [{0, Size}, {2*I, 1}, {I, Size}]),
    ?line Plist = lists:seq(21*I, 0, -I),
    ?line Pwrite = lists:map(fun(P)->{P,Data}end, Plist),
    ?line Pread = [{22*I,Size} | lists:map(fun(P)->{P,Size}end, Plist)],
    ?line Presult = [eof | lists:map(fun(_)->Data end, Plist)],
    ?line ok = ?FILE_MODULE:pwrite(File, Pwrite),
    ?line {ok, Presult} = ?FILE_MODULE:pread(File, Pread),
    ?line ok = ?FILE_MODULE:close(File),
    ?line [] = flush(),
    ok.

append(doc) -> "Test appending to a file.";
append(suite) -> [];
append(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_append"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),

    ?line First = "First line\n",
    ?line Second = "Seond lines comes here\n",
    ?line Third = "And here is the third line\n",

    %% Write a small text file.
    ?line Name1 = filename:join(NewDir, "a_file.txt"),
    ?line {ok, Fd1} = ?FILE_MODULE:open(Name1, [write]),
    ?line ok = io:format(Fd1, First, []),
    ?line ok = io:format(Fd1, Second, []),
    ?line ok = ?FILE_MODULE:close(Fd1),

    %% Open it a again and a append a line to it.
    ?line {ok, Fd2} = ?FILE_MODULE:open(Name1, [append]),
    ?line ok = io:format(Fd2, Third, []),
    ?line ok = ?FILE_MODULE:close(Fd2),

    %% Read it back and verify.
    ?line Expected = list_to_binary([First, Second, Third]),
    ?line {ok, Expected} = ?FILE_MODULE:read_file(Name1),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

open_errors(suite) -> [];
open_errors(doc) -> [];
open_errors(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line DataDir = 
	filename:dirname(
	  filename:join(?config(data_dir, Config), "x")),
    ?line DataDirSlash = DataDir++"/",
    ?line {error, E1} = ?FILE_MODULE:open(DataDir, [read]),
    ?line {error, E2} = ?FILE_MODULE:open(DataDirSlash, [read]),
    ?line {error, E3} = ?FILE_MODULE:open(DataDir, [write]),
    ?line {error, E4} = ?FILE_MODULE:open(DataDirSlash, [write]),
    ?line {eisdir,eisdir,eisdir,eisdir} = {E1,E2,E3,E4},

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

exclusive(suite) -> [];
exclusive(doc) -> "Test exclusive access to a file.";
exclusive(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line NewDir = filename:join(RootDir,
				 atom_to_list(?MODULE)
				 ++"_exclusive"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    ?line Name = filename:join(NewDir, "ex_file.txt"),
    ?line {ok, Fd} = ?FILE_MODULE:open(Name, [write, exclusive]),
    ?line {error, eexist} = ?FILE_MODULE:open(Name, [write, exclusive]),
    ?line ok = ?FILE_MODULE:close(Fd),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


pos1(suite) -> [];
pos1(doc) -> [];
pos1(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_pos1.fil"),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,write),
    ?line io:format(Fd1,"ABCDEFGH",[]),
    ?line ok = ?FILE_MODULE:close(Fd1),
    ?line {ok,Fd2} = ?FILE_MODULE:open(Name,read),

    %% Start pos is first char
    ?line io:format("Relative positions"),
    ?line "A" = io:get_chars(Fd2,'',1),
    ?line {ok,2} = ?FILE_MODULE:position(Fd2,{cur,1}), 
    ?line "C" = io:get_chars(Fd2,'',1),
    ?line {ok,0} = ?FILE_MODULE:position(Fd2,{cur,-3}), 
    ?line "A" = io:get_chars(Fd2,'',1),
    %% Backwards from first char should be an error
    ?line {ok,0} = ?FILE_MODULE:position(Fd2,{cur,-1}),
    ?line {error, einval} = ?FILE_MODULE:position(Fd2,{cur,-1}),
    %% Reset position and move again
    ?line {ok,0} = ?FILE_MODULE:position(Fd2,0),
    ?line {ok,2} = ?FILE_MODULE:position(Fd2,{cur,2}), 
    ?line "C" = io:get_chars(Fd2,'',1),
    %% Go a lot forwards
    ?line {ok,13} = ?FILE_MODULE:position(Fd2,{cur,10}), 
    ?line eof = io:get_chars(Fd2,'',1),

    %% Try some fixed positions
    ?line io:format("Fixed positions"),
    ?line {ok,8} = 
	?FILE_MODULE:position(Fd2,8), eof = io:get_chars(Fd2,'',1),
    ?line {ok,8} = 
	?FILE_MODULE:position(Fd2,cur), eof = io:get_chars(Fd2,'',1),
    ?line {ok,7} = 
	?FILE_MODULE:position(Fd2,7), "H" = io:get_chars(Fd2,'',1),
    ?line {ok,0} = 
	?FILE_MODULE:position(Fd2,0), "A" = io:get_chars(Fd2,'',1),
    ?line {ok,3} = 
	?FILE_MODULE:position(Fd2,3), "D" = io:get_chars(Fd2,'',1),
    ?line {ok,12} = 
	?FILE_MODULE:position(Fd2,12), eof = io:get_chars(Fd2,'',1),
    ?line {ok,3} = 
	?FILE_MODULE:position(Fd2,3), "D" = io:get_chars(Fd2,'',1),
    %% Try the {bof,X} notation
    ?line {ok,3} = ?FILE_MODULE:position(Fd2,{bof,3}),
    ?line "D" = io:get_chars(Fd2,'',1),

    %% Try eof positions
    ?line io:format("EOF positions"),
    ?line {ok,8} = 
	?FILE_MODULE:position(Fd2,{eof,0}), eof=io:get_chars(Fd2,'',1),
    ?line {ok,7} = 
	?FILE_MODULE:position(Fd2,{eof,-1}),
    ?line "H" = io:get_chars(Fd2,'',1),
    ?line {ok,0} = 
	?FILE_MODULE:position(Fd2,{eof,-8}), "A"=io:get_chars(Fd2,'',1),
    ?line {error, einval} = ?FILE_MODULE:position(Fd2,{eof,-9}),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

pos2(suite) -> [];
pos2(doc) -> [];
pos2(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_pos2.fil"),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,write),
    ?line io:format(Fd1,"ABCDEFGH",[]),
    ?line ok = ?FILE_MODULE:close(Fd1),
    ?line {ok,Fd2} = ?FILE_MODULE:open(Name,read),
    ?line {error, einval} = ?FILE_MODULE:position(Fd2,-1),

    %% Make sure that we still can search after an error.
    ?line {ok,0} = ?FILE_MODULE:position(Fd2, 0),
    ?line {ok,3} = ?FILE_MODULE:position(Fd2, {bof,3}),
    ?line "D" = io:get_chars(Fd2,'',1),

    ?line [] = flush(),
    ?line io:format("DONE"),
    ?line test_server:timetrap_cancel(Dog),
    ok.


file_info_basic_file(suite) -> [];
file_info_basic_file(doc) -> [];
file_info_basic_file(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir, Config),

    %% Create a short file.
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_basic_test.fil"),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name, write),
    ?line io:put_chars(Fd1, "foo bar"),
    ?line ok = ?FILE_MODULE:close(Fd1),

    %% Test that the file has the expected attributes.
    %% The times are tricky, so we will save them to a separate test case.
    ?line {ok,#file_info{size=Size,type=Type,access=Access,
			 atime=AccessTime,mtime=ModifyTime}} =
	?FILE_MODULE:read_file_info(Name),
    ?line io:format("Access ~p, Modify ~p", [AccessTime, ModifyTime]),
    ?line Size = 7,
    ?line Type = regular,
    ?line read_write = Access,
    ?line true = abs(time_dist(filter_atime(AccessTime, Config),
			       filter_atime(ModifyTime,
					    Config))) < 2,
    ?line all_integers(tuple_to_list(AccessTime) ++ tuple_to_list(ModifyTime)),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

file_info_basic_directory(suite) -> [];
file_info_basic_directory(doc) -> [];
file_info_basic_directory(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),

    %% Note: filename:join/1 removes any trailing slash,
    %% which is essential for ?FILE_MODULE:file_info/1 to work on
    %% platforms such as Windows95.
    ?line RootDir = filename:join([?config(priv_dir, Config)]),

    %% Test that the RootDir directory has the expected attributes.
    ?line test_directory(RootDir, read_write),

    %% Note that on Windows file systems, 
    %% "/" or "c:/" are *NOT* directories.
    %% Therefore, test that ?FILE_MODULE:file_info/1 behaves as if they were
    %% directories.
    ?line case os:type() of
	      {win32, _} ->
		  ?line test_directory("/", read_write),
		  ?line test_directory("c:/", read_write),
		  ?line test_directory("c:\\", read_write);
	      {unix, _} ->
		  ?line test_directory("/", read);
	      vxworks ->
		  %% Check is just done for owner
		  ?line test_directory("/", read_write)
	  end,
    ?line test_server:timetrap_cancel(Dog).

test_directory(Name, ExpectedAccess) ->
    ?line {ok,#file_info{size=Size,type=Type,access=Access,
			 atime=AccessTime,mtime=ModifyTime}} =
	?FILE_MODULE:read_file_info(Name),
    ?line io:format("Testing directory ~s", [Name]),
    ?line io:format("Directory size is ~p", [Size]),
    ?line io:format("Access ~p", [Access]),
    ?line io:format("Access time ~p; Modify time~p", 
		    [AccessTime, ModifyTime]),
    ?line Type = directory,
    ?line Access = ExpectedAccess,
    ?line all_integers(tuple_to_list(AccessTime) ++ tuple_to_list(ModifyTime)),
    ?line [] = flush(),
    ok.

all_integers([{A,B,C}|T]) ->
    all_integers([A,B,C|T]);
all_integers([Int|Rest]) when is_integer(Int) ->
    ?line all_integers(Rest);
all_integers([]) -> ok.

%% Try something nonexistent.

file_info_bad(suite) -> [];
file_info_bad(doc) -> [];
file_info_bad(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = filename:join([?config(priv_dir, Config)]),
    ?line {error, enoent} = 
	?FILE_MODULE:read_file_info(
	  filename:join(RootDir, 
			atom_to_list(?MODULE)++ "_nonexistent")),
    ?line {error, enoent} = ?FILE_MODULE:read_file_info(""),
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%% Test that the file times behave as they should.

file_info_times(suite) -> [];
file_info_times(doc) -> [];
file_info_times(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(60)),
    %% We have to try this twice, since if the test runs across the change
    %% of a month the time diff calculations will fail. But it won't happen
    %% if you run it twice in succession.
    ?line test_server:m_out_of_n(
	    1,2,
	    fun() -> ?line file_info_int(Config) end),
    ?line test_server:timetrap_cancel(Dog),
    ok.

file_info_int(Config) ->
    %% Note: filename:join/1 removes any trailing slash,
    %% which is essential for ?FILE_MODULE:file_info/1 to work on
    %% platforms such as Windows95.

    ?line RootDir = filename:join([?config(priv_dir, Config)]),
    ?line test_server:format("RootDir = ~p", [RootDir]),

    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_file_info.fil"),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,write),
    ?line io:put_chars(Fd1,"foo"),

    %% check that the file got a modify date max a few seconds away from now
    ?line {ok,#file_info{type=regular,atime=AccTime1,mtime=ModTime1}} =
	?FILE_MODULE:read_file_info(Name),
    ?line Now = erlang:localtime(), %???
    ?line io:format("Now ~p",[Now]),
    ?line io:format("Open file Acc ~p Mod ~p",[AccTime1,ModTime1]),
    ?line true = abs(time_dist(filter_atime(Now, Config),
			       filter_atime(AccTime1,
					    Config))) < 8,
    ?line true = abs(time_dist(Now,ModTime1)) < 8,

    %% Sleep until we can be sure the seconds value has changed.
    %% Note: FAT-based filesystem (like on Windows 95) have
    %% a resolution of 2 seconds.
    ?line test_server:sleep(test_server:seconds(2.2)),

    %% close the file, and watch the modify date change
    ?line ok = ?FILE_MODULE:close(Fd1),
    ?line {ok,#file_info{size=Size,type=regular,access=Access,
			 atime=AccTime2,mtime=ModTime2}} =
	?FILE_MODULE:read_file_info(Name),
    ?line io:format("Closed file Acc ~p Mod ~p",[AccTime2,ModTime2]),
    ?line true = time_dist(ModTime1,ModTime2) >= 0,

    %% this file is supposed to be binary, so it'd better keep it's size
    ?line Size = 3,
    ?line Access = read_write,

    %% Do some directory checking
    ?line {ok,#file_info{size=DSize,type=directory,access=DAccess,
			 atime=AccTime3,mtime=ModTime3}} =
	?FILE_MODULE:read_file_info(RootDir),
    %% this dir was modified only a few secs ago
    ?line io:format("Dir Acc ~p; Mod ~p; Now ~p", [AccTime3, ModTime3, Now]),
    ?line true = abs(time_dist(Now,ModTime3)) < 5,
    ?line DAccess = read_write,
    ?line io:format("Dir size is ~p",[DSize]),

    ?line [] = flush(),
    ok.

%% Filter access times, to copy with a deficiency of FAT file systems
%% (on Windows): The access time is actually only a date.

filter_atime(Atime, Config) ->
    case lists:member(no_access_time, Config) of
	true ->
	    case Atime of
	    	{Date, _} ->
	    	   {Date, {0, 0, 0}};
		{Y, M, D, _, _, _} ->
		   {Y, M, D, 0, 0, 0}
	    end;
	false ->
	    Atime
    end.

%% Test the write_file_info/2 function.

file_write_file_info(suite) -> [];
file_write_file_info(doc) -> [];
file_write_file_info(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = get_good_directory(Config),
    ?line test_server:format("RootDir = ~p", [RootDir]),

    %% Set the file to read only AND update the file times at the same time.
    %% (This used to fail on Windows NT/95 for a local filesystem.)
    %% Note: Seconds must be even; see note in file_info_times/1.

    ?line Name1 = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_write_file_info_ro"),
    ?line ok = ?FILE_MODULE:write_file(Name1, "hello"),
    ?line Time = {{1997, 01, 02}, {12, 35, 42}},
    ?line Info = #file_info{mode=8#400, atime=Time, mtime=Time, ctime=Time},
    ?line ok = ?FILE_MODULE:write_file_info(Name1, Info),

    %% Read back the times.

    ?line {ok, ActualInfo} = ?FILE_MODULE:read_file_info(Name1),
    ?line #file_info{mode=_Mode, atime=ActAtime, mtime=Time,
		     ctime=ActCtime} = ActualInfo,
    ?line FilteredAtime = filter_atime(Time, Config),
    ?line FilteredAtime = filter_atime(ActAtime, Config),
    ?line case os:type() of
	      {win32, _} ->
		  %% On Windows, "ctime" means creation time and it can
		  %% be set.
		  ActCtime = Time;
	      _ ->
		  ok
	  end,
    ?line {error, eacces} = ?FILE_MODULE:write_file(Name1, "hello again"),

    %% Make the file writable again.

    ?line ?FILE_MODULE:write_file_info(Name1, #file_info{mode=8#600}),
    ?line ok = ?FILE_MODULE:write_file(Name1, "hello again"),

    %% And unwritable.
    ?line ?FILE_MODULE:write_file_info(Name1, #file_info{mode=8#400}),
    ?line {error, eacces} = ?FILE_MODULE:write_file(Name1, "hello again"),

    %% Write the times again.
    %% Note: Seconds must be even; see note in file_info_times/1.

    ?line NewTime = {{1997, 02, 15}, {13, 18, 20}},
    ?line NewInfo = #file_info{atime=NewTime, mtime=NewTime, ctime=NewTime},
    ?line ok = ?FILE_MODULE:write_file_info(Name1, NewInfo),
    ?line {ok, ActualInfo2} = ?FILE_MODULE:read_file_info(Name1),
    ?line #file_info{atime=NewActAtime, mtime=NewTime,
		     ctime=NewActCtime} = ActualInfo2,
    ?line NewFilteredAtime = filter_atime(NewTime, Config),
    ?line NewFilteredAtime = filter_atime(NewActAtime, Config),
    ?line case os:type() of
	      {win32, _} -> NewActCtime = NewTime;
	      _ -> ok
	  end,

    %% The file should still be unwritable.
    ?line {error, eacces} = ?FILE_MODULE:write_file(Name1, "hello again"),

    %% Make the file writeable again, so that we can remove the
    %% test suites ... :-)
    ?line ?FILE_MODULE:write_file_info(Name1, #file_info{mode=8#600}),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%% Returns a directory on a file system that has correct file times.

get_good_directory(Config) ->
    ?line ?config(priv_dir, Config).


consult1(suite) -> [];
consult1(doc) -> [];
consult1(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_consult.fil"),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,write),
    %% note that there is no final \n (only a space)
    ?line io:format(Fd1,
		    "{this,[is,1.0],'journey'}.\n\"into\". (sound). ",
		    []),
    ?line ok = ?FILE_MODULE:close(Fd1),
    ?line {ok,[{this,[is,1.0],journey},"into",sound]} = 
	?FILE_MODULE:consult(Name),

    ?line {ok,Fd2} = ?FILE_MODULE:open(Name,write),
    %% note the missing double quote
    ?line io:format(
	    Fd2,"{this,[is,1.0],'journey'}.\n \"into. (sound). ",[]),
    ?line ok = ?FILE_MODULE:close(Fd2),
    ?line {error, {_, _, _} = Msg} = ?FILE_MODULE:consult(Name),
    ?line io:format("Errmsg: ~p",[Msg]),

    ?line {error, enoent} = ?FILE_MODULE:consult(Name ++ ".nonexistent"),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

path_consult(suite) -> [];
path_consult(doc) -> [];
path_consult(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line FileName = atom_to_list(?MODULE)++"_path_consult.fil",
    ?line Name = filename:join(RootDir, FileName),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,write),
    ?line io:format(Fd1,"{this,is,a,journey,into,sound}.\n",[]),
    ?line ok = ?FILE_MODULE:close(Fd1),
    %% File last in path
    ?line {ok,[{this,is,a,journey,into,sound}],Dir} =
	?FILE_MODULE:path_consult(
	  [filename:join(RootDir, "dir1"),
	   filename:join(RootDir, ".."),
	   filename:join(RootDir, "dir2"),
	   RootDir], FileName),
    ?line true = lists:prefix(RootDir,Dir),

    %% While maybe not an error, it may be worth noting that
    %% when the full path to a file is given, it's always found
    %% regardless of the contents of the path
    ?line {ok,_,_} = ?FILE_MODULE:path_consult(["nosuch1","nosuch2"],Name),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.


eval1(suite) -> [];
eval1(doc) -> [];
eval1(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)++"_eval.fil"),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,write),
    %% note that there is no final \n (only a space)
    ?line io:format(Fd1,"put(evaluated_ok,\ntrue). ",[]),
    ?line ok = ?FILE_MODULE:close(Fd1),
    ?line ok = ?FILE_MODULE:eval(Name),
    ?line true = get(evaluated_ok),
    
    ?line {ok,Fd2} = ?FILE_MODULE:open(Name,write),
    %% note that there is no final \n (only a space)
    ?line io:format(Fd2,"put(evaluated_ok,\nR). ",[]),
    ?line ok = ?FILE_MODULE:close(Fd2),
    ?line ok = ?FILE_MODULE:eval(
		  Name, 
		  erl_eval:add_binding('R', true, erl_eval:new_bindings())),
    ?line true = get(evaluated_ok),
    
    ?line {ok,Fd3} = ?FILE_MODULE:open(Name,write),
    %% garbled
    ?line io:format(Fd3,"puGARBLED-GARBLED\ntrue). ",[]),
    ?line ok = ?FILE_MODULE:close(Fd3),
    ?line {error, {_, _, _} = Msg} = ?FILE_MODULE:eval(Name),
    ?line io:format("Errmsg1: ~p",[Msg]),
    
    ?line {error, enoent} = ?FILE_MODULE:eval(Name ++ ".nonexistent"),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

path_eval(suite) -> [];
path_eval(doc) -> [];
path_eval(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line FileName = atom_to_list(?MODULE)++"_path_eval.fil",
    ?line Name = filename:join(RootDir, FileName),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,write),
    ?line io:format(Fd1,"put(evaluated_ok,true).\n",[]),
    ?line ok = ?FILE_MODULE:close(Fd1),
    %% File last in path
    ?line {ok,Dir} =
	?FILE_MODULE:path_eval(
	  [filename:join(RootDir, "dir1"),
	   filename:join(RootDir, ".."),
	   filename:join(RootDir, "dir2"),
	   RootDir],FileName),
    ?line true = get(evaluated_ok),
    ?line true = lists:prefix(RootDir,Dir),
    
    %% While maybe not an error, it may be worth noting that
    %% when the full path to a file is given, it's always found
    %% regardless of the contents of the path
    ?line {ok,Fd2} = ?FILE_MODULE:open(Name,write),
    ?line io:format(Fd2,"put(evaluated_ok,R).\n",[]),
    ?line ok = ?FILE_MODULE:close(Fd2),
    ?line {ok,_} = ?FILE_MODULE:path_eval(
		      ["nosuch1","nosuch2"],
		      Name,
		      erl_eval:add_binding('R', true, erl_eval:new_bindings())),
    
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.


script1(suite) -> [];
script1(doc) -> "";
script1(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)++"_script.fil"),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,write),
    %% note that there is no final \n (only a space)
    ?line io:format(Fd1,"A = 11,\nB = 6,\nA+B. ",[]),
    ?line ok = ?FILE_MODULE:close(Fd1),
    ?line {ok,17} = ?FILE_MODULE:script(Name),
    
    ?line {ok,Fd2} = ?FILE_MODULE:open(Name,write),
    %% note that there is no final \n (only a space)
    ?line io:format(Fd2,"A = 11,\nA+B. ",[]),
    ?line ok = ?FILE_MODULE:close(Fd2),
    ?line {ok,17} = ?FILE_MODULE:script(
		       Name, 
		       erl_eval:add_binding('B', 6, erl_eval:new_bindings())),
    
    ?line {ok,Fd3} = ?FILE_MODULE:open(Name,write),
    ?line io:format(Fd3,"A = 11,\nB = six,\nA+B. ",[]),
    ?line ok = ?FILE_MODULE:close(Fd3),
    ?line {error, {_, _, _} = Msg} = ?FILE_MODULE:script(Name),
    ?line io:format("Errmsg1: ~p",[Msg]),

    ?line {error, enoent} = ?FILE_MODULE:script(Name ++ ".nonexistent"),
    
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.
    
path_script(suite) -> [];
path_script(doc) -> [];
path_script(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line FileName = atom_to_list(?MODULE)++"_path_script.fil",
    ?line Name = filename:join(RootDir, FileName),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name,write),
    ?line io:format(Fd1,"A = 11,\nB = 6,\nA+B.\n",[]),
    ?line ok = ?FILE_MODULE:close(Fd1),
    %% File last in path
    ?line {ok, 17, Dir} =
	?FILE_MODULE:path_script(
	   [filename:join(RootDir, "dir1"),
	    filename:join(RootDir, ".."),
	    filename:join(RootDir, "dir2"),
	    RootDir],FileName),
    ?line true = lists:prefix(RootDir,Dir),
    
    %% While maybe not an error, it may be worth noting that
    %% when the full path to a file is given, it's always found
    %% regardless of the contents of the path
    ?line {ok,Fd2} = ?FILE_MODULE:open(Name,write),
    ?line io:format(Fd2,"A = 11,\nA+B.",[]),
    ?line ok = ?FILE_MODULE:close(Fd2),
    ?line {ok, 17, Dir} = 
	?FILE_MODULE:path_script(
	   ["nosuch1","nosuch2"],
	   Name,
	   erl_eval:add_binding('B', 6, erl_eval:new_bindings())),
    
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

    

truncate(suite) -> [];
truncate(doc) -> [];
truncate(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_truncate.fil"),

    %% Create a file with some data.
    ?line MyData = "0123456789abcdefghijklmnopqrstuvxyz",
    ?line ok = ?FILE_MODULE:write_file(Name, MyData),

    %% Truncate the file to 10 characters.
    ?line {ok, Fd} = ?FILE_MODULE:open(Name, read_write),
    ?line {ok, 10} = ?FILE_MODULE:position(Fd, 10),
    ?line ok = ?FILE_MODULE:truncate(Fd),
    ?line ok = ?FILE_MODULE:close(Fd),

    %% Read back the file and check that it has been truncated.
    ?line Expected = list_to_binary("0123456789"),
    ?line {ok, Expected} = ?FILE_MODULE:read_file(Name),

    %% Open the file read only and verify that it is not possible to
    %% truncate it, OTP-1960
    ?line {ok, Fd2} = ?FILE_MODULE:open(Name, read),
    ?line {ok, 5} = ?FILE_MODULE:position(Fd2, 5),
    ?line {error, _} = ?FILE_MODULE:truncate(Fd2),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.


datasync(suite) -> [];
datasync(doc) -> "Tests that ?FILE_MODULE:datasync/1 at least doesn't crash.";
datasync(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line PrivDir = ?config(priv_dir, Config),
    ?line Sync = filename:join(PrivDir,
			       atom_to_list(?MODULE)
			       ++"_sync.fil"),

    %% Raw open.
    ?line {ok, Fd} = ?FILE_MODULE:open(Sync, [write, raw]),
    ?line ok = ?FILE_MODULE:datasync(Fd),
    ?line ok = ?FILE_MODULE:close(Fd),

    %% Ordinary open.
    ?line {ok, Fd2} = ?FILE_MODULE:open(Sync, [write]),
    ?line ok = ?FILE_MODULE:datasync(Fd2),
    ?line ok = ?FILE_MODULE:close(Fd2),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.


sync(suite) -> [];
sync(doc) -> "Tests that ?FILE_MODULE:sync/1 at least doesn't crash.";
sync(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line PrivDir = ?config(priv_dir, Config),
    ?line Sync = filename:join(PrivDir, 
			       atom_to_list(?MODULE)
			       ++"_sync.fil"),

    %% Raw open.
    ?line {ok, Fd} = ?FILE_MODULE:open(Sync, [write, raw]),
    ?line ok = ?FILE_MODULE:sync(Fd),
    ?line ok = ?FILE_MODULE:close(Fd),

    %% Ordinary open.
    ?line {ok, Fd2} = ?FILE_MODULE:open(Sync, [write]),
    ?line ok = ?FILE_MODULE:sync(Fd2),
    ?line ok = ?FILE_MODULE:close(Fd2),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

advise(suite) -> [];
advise(doc) -> "Tests that ?FILE_MODULE:advise/4 at least doesn't crash.";
advise(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line PrivDir = ?config(priv_dir, Config),
    ?line Advise = filename:join(PrivDir,
			       atom_to_list(?MODULE)
			       ++"_advise.fil"),

    Line1 = "Hello\n",
    Line2 = "World!\n",

    ?line {ok, Fd} = ?FILE_MODULE:open(Advise, [write]),
    ?line ok = ?FILE_MODULE:advise(Fd, 0, 0, normal),
    ?line ok = io:format(Fd, "~s", [Line1]),
    ?line ok = io:format(Fd, "~s", [Line2]),
    ?line ok = ?FILE_MODULE:close(Fd),

    ?line {ok, Fd2} = ?FILE_MODULE:open(Advise, [write]),
    ?line ok = ?FILE_MODULE:advise(Fd2, 0, 0, random),
    ?line ok = io:format(Fd2, "~s", [Line1]),
    ?line ok = io:format(Fd2, "~s", [Line2]),
    ?line ok = ?FILE_MODULE:close(Fd2),

    ?line {ok, Fd3} = ?FILE_MODULE:open(Advise, [write]),
    ?line ok = ?FILE_MODULE:advise(Fd3, 0, 0, sequential),
    ?line ok = io:format(Fd3, "~s", [Line1]),
    ?line ok = io:format(Fd3, "~s", [Line2]),
    ?line ok = ?FILE_MODULE:close(Fd3),

    ?line {ok, Fd4} = ?FILE_MODULE:open(Advise, [write]),
    ?line ok = ?FILE_MODULE:advise(Fd4, 0, 0, will_need),
    ?line ok = io:format(Fd4, "~s", [Line1]),
    ?line ok = io:format(Fd4, "~s", [Line2]),
    ?line ok = ?FILE_MODULE:close(Fd4),

    ?line {ok, Fd5} = ?FILE_MODULE:open(Advise, [write]),
    ?line ok = ?FILE_MODULE:advise(Fd5, 0, 0, dont_need),
    ?line ok = io:format(Fd5, "~s", [Line1]),
    ?line ok = io:format(Fd5, "~s", [Line2]),
    ?line ok = ?FILE_MODULE:close(Fd5),

    ?line {ok, Fd6} = ?FILE_MODULE:open(Advise, [write]),
    ?line ok = ?FILE_MODULE:advise(Fd6, 0, 0, no_reuse),
    ?line ok = io:format(Fd6, "~s", [Line1]),
    ?line ok = io:format(Fd6, "~s", [Line2]),
    ?line ok = ?FILE_MODULE:close(Fd6),

    ?line {ok, Fd7} = ?FILE_MODULE:open(Advise, [write]),
    ?line {error, einval} = ?FILE_MODULE:advise(Fd7, 0, 0, bad_advise),
    ?line ok = ?FILE_MODULE:close(Fd7),

    %% test write without advise, then a read after an advise
    ?line {ok, Fd8} = ?FILE_MODULE:open(Advise, [write]),
    ?line ok = io:format(Fd8, "~s", [Line1]),
    ?line ok = io:format(Fd8, "~s", [Line2]),
    ?line ok = ?FILE_MODULE:close(Fd8),
    ?line {ok, Fd9} = ?FILE_MODULE:open(Advise, [read]),
    Offset = 0,
    %% same as a 0 length in some implementations
    Length = length(Line1) + length(Line2),
    ?line ok = ?FILE_MODULE:advise(Fd9, Offset, Length, sequential),
    ?line {ok, Line1} = ?FILE_MODULE:read_line(Fd9),
    ?line {ok, Line2} = ?FILE_MODULE:read_line(Fd9),
    ?line eof = ?FILE_MODULE:read_line(Fd9),
    ?line ok = ?FILE_MODULE:close(Fd9),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

delete(suite) -> [];
delete(doc) -> [];
delete(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line Name = filename:join(RootDir, 
			       atom_to_list(?MODULE)
			       ++"_delete.fil"),
    ?line {ok, Fd1} = ?FILE_MODULE:open(Name, write),
    ?line io:format(Fd1,"ok.\n",[]),
    ?line ok = ?FILE_MODULE:close(Fd1),
    %% Check that the file is readable
    ?line {ok, Fd2} = ?FILE_MODULE:open(Name, read),
    ?line ok = ?FILE_MODULE:close(Fd2),
    ?line ok = ?FILE_MODULE:delete(Name),
    %% Check that the file is not readable anymore
    ?line {error, _} = ?FILE_MODULE:open(Name, read),
    %% Try deleting a nonexistent file
    ?line {error, enoent} = ?FILE_MODULE:delete(Name),
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

rename(suite) ->[];
rename(doc) ->[];
rename(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line FileName1 = atom_to_list(?MODULE)++"_rename.fil",
    ?line FileName2 = atom_to_list(?MODULE)++"_rename.ful",
    ?line Name1 = filename:join(RootDir, FileName1),
    ?line Name2 = filename:join(RootDir, FileName2),
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name1,write),
    ?line ok = ?FILE_MODULE:close(Fd1),
    %% Rename, and check that id really changed name
    ?line ok = ?FILE_MODULE:rename(Name1,Name2),
    ?line {error, _} = ?FILE_MODULE:open(Name1,read),
    ?line {ok,Fd2} = ?FILE_MODULE:open(Name2,read),
    ?line ok = ?FILE_MODULE:close(Fd2),
    %% Try renaming something to itself
    ?line ok = ?FILE_MODULE:rename(Name2,Name2),
    %% Try renaming something that doesn't exist
    ?line {error, enoent} = ?FILE_MODULE:rename(Name1,Name2),
    %% Try renaming to something else than a string
    ?line {error, badarg} = ?FILE_MODULE:rename(Name1,{foo,bar}),
    
    %% Move between directories
    ?line DirName1 = filename:join(RootDir,
				   atom_to_list(?MODULE)
				   ++"_rename_dir"),
    ?line DirName2 = filename:join(RootDir,
				   atom_to_list(?MODULE)
				   ++"_second_rename_dir"),
    ?line Name1foo = filename:join(DirName1, "foo.fil"),
    ?line Name2foo = filename:join(DirName2, "foo.fil"),
    ?line Name2bar = filename:join(DirName2, "bar.dir"),
    ?line ok = ?FILE_MODULE:make_dir(DirName1),
    %% The name has to include the full file name, path in not enough
    ?line expect({error, eisdir}, {error, eexist}, 
		 ?FILE_MODULE:rename(Name2,DirName1)),
    ?line ok = ?FILE_MODULE:rename(Name2, Name1foo),
    %% Now rename the directory
    ?line ok = ?FILE_MODULE:rename(DirName1,DirName2),
    %% And check that the file is there now
    ?line {ok,Fd3} = ?FILE_MODULE:open(Name2foo, read),
    ?line ok = ?FILE_MODULE:close(Fd3),
    %% Try some dirty things now: move the directory into itself
    ?line {error, Msg1} = ?FILE_MODULE:rename(DirName2, Name2bar),
    ?line io:format("Errmsg1: ~p",[Msg1]),
    %% move dir into a file in itself
    ?line {error, Msg2} = ?FILE_MODULE:rename(DirName2, Name2foo),
    ?line io:format("Errmsg2: ~p",[Msg2]),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

names(suite) -> [];
names(doc) -> [];
names(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(5)),
    ?line RootDir = ?config(priv_dir,Config),
    ?line FileName = "foo1.fil",
    ?line Name1 = filename:join(RootDir, FileName),
    ?line Name2 = [RootDir,"/","foo1",".","fil"],
    ?line Name3 = [RootDir,"/",foo,$1,[[[],[],'.']],"f",il],
    ?line Name4 = list_to_atom(Name1),
    ?line {ok,Fd0} = ?FILE_MODULE:open(Name1,write),
    ?line ok = ?FILE_MODULE:close(Fd0),

    %% Try some file names
    ?line {ok,Fd1} = ?FILE_MODULE:open(Name1,read),
    ?line ok = ?FILE_MODULE:close(Fd1),
    ?line {ok,Fd2f} = ?FILE_MODULE:open(lists:flatten(Name2),read),
    ?line ok = ?FILE_MODULE:close(Fd2f),
    ?line {ok,Fd2} = ?FILE_MODULE:open(Name2,read),
    ?line ok = ?FILE_MODULE:close(Fd2),
    ?line {ok,Fd3} = ?FILE_MODULE:open(Name3,read),
    ?line ok = ?FILE_MODULE:close(Fd3),
    ?line {ok,Fd4} = ?FILE_MODULE:open(Name4,read),
    ?line ok = ?FILE_MODULE:close(Fd4),

    %% Try some path names
    ?line Path1 = RootDir,
    ?line Path2 = [RootDir],
    ?line Path3 = ['',[],[RootDir,[[]]]],
    ?line Path4 = list_to_atom(Path1),
    ?line {ok,Fd11,_} = ?FILE_MODULE:path_open([Path1],FileName,read),
    ?line ok = ?FILE_MODULE:close(Fd11),
    ?line {ok,Fd12,_} = ?FILE_MODULE:path_open([Path2],FileName,read),
    ?line ok = ?FILE_MODULE:close(Fd12),
    ?line {ok,Fd13,_} = ?FILE_MODULE:path_open([Path3],FileName,read),
    ?line ok = ?FILE_MODULE:close(Fd13),
    ?line {ok,Fd14,_} = ?FILE_MODULE:path_open([Path4],FileName,read),
    ?line ok = ?FILE_MODULE:close(Fd14),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


e_delete(suite) -> [];
e_delete(doc) -> [];
e_delete(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line Base = filename:join(RootDir, 
			       atom_to_list(?MODULE)++"_e_delete"),
    ?line ok = ?FILE_MODULE:make_dir(Base),

    %% Delete a non-existing file.
    ?line {error, enoent} = 
	?FILE_MODULE:delete(filename:join(Base, "non_existing")),

    %% Delete a directory.
    ?line {error, eperm} = ?FILE_MODULE:delete(Base),

    %% Use a path-name with a non-directory component.
    ?line Afile = filename:join(Base, "a_file"),
    ?line ok = ?FILE_MODULE:write_file(Afile, "hello\n"),
    ?line {error, E} = 
	expect({error, enotdir}, {error, enoent}, 
	       ?FILE_MODULE:delete(filename:join(Afile, "another_file"))),
    ?line io:format("Result: ~p~n", [E]),

    %% No permission.
    ?line case os:type() of
	      {unix, _} ->
		  ?line ?FILE_MODULE:write_file_info(
			   Base, #file_info {mode=0}),
		  ?line {error, eacces} = ?FILE_MODULE:delete(Afile),
		  ?line ?FILE_MODULE:write_file_info(
			   Base, #file_info {mode=8#600});
	      {win32, _} ->
		  %% Remove a character device.
		  ?line {error, eacces} = ?FILE_MODULE:delete("nul");
	      vxworks ->
		  ok
	  end,

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%%% FreeBSD gives EEXIST when renaming a file to an empty dir, although the
%%% manual page can be interpreted as saying that EISDIR should be given.
%%% (What about FreeBSD? We store our nightly build results on a FreeBSD
%%% file system, that's what.)

e_rename(suite) -> [];
e_rename(doc) -> [];
e_rename(Config) when is_list(Config) ->
    case os:type() of
	vxworks ->
	    {comment, "Windriver: dosFs must be fixed first!"};
	_ ->
	    ?line Dog = test_server:timetrap(test_server:seconds(10)),
	    ?line RootDir = ?config(priv_dir, Config),
	    ?line Base = filename:join(RootDir,
				       atom_to_list(?MODULE)++"_e_rename"),
	    ?line ok = ?FILE_MODULE:make_dir(Base),
	
	    %% Create an empty directory.
	    ?line EmptyDir = filename:join(Base, "empty_dir"),
	    ?line ok = ?FILE_MODULE:make_dir(EmptyDir),

	    %% Create a non-empty directory.
	    ?line NonEmptyDir = filename:join(Base, "non_empty_dir"),
	    ?line ok = ?FILE_MODULE:make_dir(NonEmptyDir),
	    ?line ok = ?FILE_MODULE:write_file(
			  filename:join(NonEmptyDir, "a_file"),
			  "hello\n"),

	    %% Create another non-empty directory.
	    ?line ADirectory = filename:join(Base, "a_directory"),
	    ?line ok = ?FILE_MODULE:make_dir(ADirectory),
	    ?line ok = ?FILE_MODULE:write_file(
			  filename:join(ADirectory, "a_file"),
			  "howdy\n\n"),

	    %% Create a data file.
	    ?line File = filename:join(Base, "just_a_file"),
	    ?line ok = ?FILE_MODULE:write_file(File, "anything goes\n\n"),
	
	    %% Move an existing directory to a non-empty directory.
	    ?line {error, eexist} = 
		?FILE_MODULE:rename(ADirectory, NonEmptyDir),

	    %% Move a root directory.
	    ?line {error, einval} = ?FILE_MODULE:rename("/", "arne"),

	    %% Move Base into Base/new_name.
	    ?line {error, einval} = 
		?FILE_MODULE:rename(Base, filename:join(Base, "new_name")),

	    %% Overwrite a directory with a file.
	    ?line expect({error, eexist}, %FreeBSD (?)
			 {error, eisdir},
			 ?FILE_MODULE:rename(File, EmptyDir)),
	    ?line expect({error, eexist}, %FreeBSD (?)
			 {error, eisdir},
			 ?FILE_MODULE:rename(File, NonEmptyDir)),

	    %% Move a non-existing file.
	    ?line NonExistingFile = 
		filename:join(Base, "non_existing_file"),
	    ?line {error, enoent} = 
		?FILE_MODULE:rename(NonExistingFile, NonEmptyDir),

	    %% Overwrite a file with a directory.
	    ?line expect({error, eexist}, %FreeBSD (?)
			 {error, enotdir},
			 ?FILE_MODULE:rename(ADirectory, File)),
	    
	    %% Move a file to another filesystem.
	    %% XXX - This test case is bogus. We cannot be guaranteed that
	    %%       the source and destination are on 
	    %%       different filesystems.
	    %%
	    %% XXX - Gross hack!
	    ?line Comment = 
		case os:type() of
		    {unix, _} ->
			OtherFs = "/tmp",
			?line NameOnOtherFs =
			    filename:join(OtherFs, filename:basename(File)),
			?line {ok, Com} = 
			    case ?FILE_MODULE:rename(File, NameOnOtherFs) of
				{error, exdev} ->
				    %% The file could be in 
				    %% the same filesystem!
				    {ok, ok};
				    ok ->
				    {ok, {comment, 
					  "Moving between filesystems "
					  "suceeded, files are probably "
					  "in the same filesystem!"}};
				{error, eperm} ->
				    {ok, {comment, "SBS! You don't "
					  "have the permission to do "
					  "this test!"}};
				Else ->
				    Else
			    end,
			Com;
		    {win32, _} ->
			%% At least Windows NT can 
			%% successfully move a file to
			%% another drive.
			ok
		end,
	    ?line [] = flush(),
	    ?line test_server:timetrap_cancel(Dog),
	    Comment
    end.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

e_make_dir(suite) -> [];
e_make_dir(doc) -> [];
e_make_dir(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line Base = filename:join(RootDir, 
			       atom_to_list(?MODULE)++"_e_make_dir"),
    ?line ok = ?FILE_MODULE:make_dir(Base),

    %% A component of the path does not exist.
    ?line {error, enoent} = 
	?FILE_MODULE:make_dir(filename:join([Base, "a", "b"])),

    %% Use a path-name with a non-directory component.
    ?line Afile = filename:join(Base, "a_directory"),
    ?line ok = ?FILE_MODULE:write_file(Afile, "hello\n"),
    ?line case ?FILE_MODULE:make_dir(
		  filename:join(Afile, "another_directory")) of
	      {error, enotdir} -> io:format("Result: enotdir");
	      {error, enoent} -> io:format("Result: enoent")
	  end,

    %% No permission (on Unix only).
    case os:type() of
	{unix, _} ->
	    ?line ?FILE_MODULE:write_file_info(Base, #file_info {mode=0}),
	    ?line {error, eacces} = 
		?FILE_MODULE:make_dir(filename:join(Base, "xxxx")),
	    ?line ?FILE_MODULE:write_file_info(
		     Base, #file_info {mode=8#600});
	{win32, _} ->
	    ok;
	vxworks ->
	    ok
    end,
    ?line test_server:timetrap_cancel(Dog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

e_del_dir(suite) -> [];
e_del_dir(doc) -> [];
e_del_dir(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line Base = test_server:temp_name(filename:join(RootDir, "e_del_dir")),
    ?line io:format("Base: ~p", [Base]),
    ?line ok = ?FILE_MODULE:make_dir(Base),

    %% Delete a non-existent directory.
    ?line {error, enoent} = 
	?FILE_MODULE:del_dir(filename:join(Base, "non_existing")),

    %% Use a path-name with a non-directory component.
    ?line Afile = filename:join(Base, "a_directory"),
    ?line ok = ?FILE_MODULE:write_file(Afile, "hello\n"),
    ?line {error, E1} = 
	expect({error, enotdir}, {error, enoent},
	       ?FILE_MODULE:del_dir(
		 filename:join(Afile, "another_directory"))),
    ?line io:format("Result: ~p", [E1]),

    %% Delete a non-empty directory.
    ?line {error, E2} = 
	expect({error, enotempty}, {error, eexist}, {error, eacces},
	       ?FILE_MODULE:del_dir(Base)),
    ?line io:format("Result: ~p", [E2]),

    %% Remove the current directory.
    ?line {error, E3} = 
	expect({error, einval}, 
	       {error, eperm}, % Linux and DUX
	       {error, eacces},
	       {error, ebusy},
	       ?FILE_MODULE:del_dir(".")),
    ?line io:format("Result: ~p", [E3]),

    %% No permission.
    case os:type() of
	{unix, _} ->
	    ?line ADirectory = filename:join(Base, "no_perm"),
	    ?line ok = ?FILE_MODULE:make_dir(ADirectory),
	    ?line ?FILE_MODULE:write_file_info(
		     Base, #file_info {mode=0}),
	    ?line {error, eacces} = ?FILE_MODULE:del_dir(ADirectory),
	    ?line ?FILE_MODULE:write_file_info(
		     Base, #file_info {mode=8#600});
	{win32, _} ->
	    ok;
	vxworks ->
	    ok
    end,
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


%% Trying reading and positioning from a compressed file.

read_compressed_cooked(Config) when is_list(Config) ->
    ?line Data = ?config(data_dir, Config),
    ?line Real = filename:join(Data, "realmen.html.gz"),
    ?line {ok, Fd} = ?FILE_MODULE:open(Real, [read,compressed]),
    ?line try_read_file_list(Fd).

read_compressed_cooked_binary(Config) when is_list(Config) ->
    ?line Data = ?config(data_dir, Config),
    ?line Real = filename:join(Data, "realmen.html.gz"),
    ?line {ok, Fd} = ?FILE_MODULE:open(Real, [read,compressed,binary]),
    ?line try_read_file_binary(Fd).

%% Trying reading and positioning from an uncompressed file,
%% but with the compressed flag given.

read_not_really_compressed(Config) when is_list(Config) ->
    ?line Data = ?config(data_dir, Config),
    ?line Priv = ?config(priv_dir, Config),

    %% The file realmen.html might have got CRs added (by WinZip).
    %% Remove them, or the file positions will not be correct.

    ?line Real = filename:join(Data, "realmen.html"),
    ?line RealPriv = filename:join(Priv, 
				   atom_to_list(?MODULE)++"_realmen.html"),
    ?line {ok, RealDataBin} = ?FILE_MODULE:read_file(Real),
    ?line RealData = remove_crs(binary_to_list(RealDataBin), []),
    ?line ok = ?FILE_MODULE:write_file(RealPriv, RealData),
    ?line {ok, Fd} = ?FILE_MODULE:open(RealPriv, [read, compressed]),
    ?line try_read_file_list(Fd).

remove_crs([$\r|Rest], Result) ->
    remove_crs(Rest, Result);
remove_crs([C|Rest], Result) ->
    remove_crs(Rest, [C|Result]);
remove_crs([], Result) ->
    lists:reverse(Result).

try_read_file_list(Fd) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),

    %% Seek to the current position (nothing should happen).

    ?line {ok, 0} = ?FILE_MODULE:position(Fd, 0),
    ?line {ok, 0} = ?FILE_MODULE:position(Fd, {cur, 0}),

    %% Read a few lines from a compressed file.

    ?line ShouldBe = "<TITLE>Real Programmers Don't Use PASCAL</TITLE>\n",
    ?line ShouldBe = io:get_line(Fd, ''),

    %% Now seek forward.

    ?line {ok, 381} = ?FILE_MODULE:position(Fd, 381),
    ?line Back = "Back in the good old days -- the \"Golden Era\" " ++
	"of computers, it was\n",
    ?line Back = io:get_line(Fd, ''),

    %% Try to search forward relative to the current position.

    ?line {ok, CurPos} = ?FILE_MODULE:position(Fd, {cur, 0}),
    ?line RealPos = 4273,
    ?line {ok, RealPos} = ?FILE_MODULE:position(Fd, {cur, RealPos-CurPos}),
    ?line RealProg = "<LI> Real Programmers aren't afraid to use GOTOs.\n",
    ?line RealProg = io:get_line(Fd, ''),

    %% Seek backward.

    ?line AfterTitle = length("<TITLE>"),
    ?line {ok, AfterTitle} = ?FILE_MODULE:position(Fd, AfterTitle),
    ?line Title = "Real Programmers Don't Use PASCAL</TITLE>\n",
    ?line Title = io:get_line(Fd, ''),

    %% Done.

    ?line ?FILE_MODULE:close(Fd),
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

try_read_file_binary(Fd) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),

    %% Seek to the current position (nothing should happen).

    ?line {ok, 0} = ?FILE_MODULE:position(Fd, 0),
    ?line {ok, 0} = ?FILE_MODULE:position(Fd, {cur, 0}),

    %% Read a few lines from a compressed file.

    ?line ShouldBe = <<"<TITLE>Real Programmers Don't Use PASCAL</TITLE>\n">>,
    ?line ShouldBe = io:get_line(Fd, ''),

    %% Now seek forward.

    ?line {ok, 381} = ?FILE_MODULE:position(Fd, 381),
    ?line Back = <<"Back in the good old days -- the \"Golden Era\" "
		  "of computers, it was\n">>,
    ?line Back = io:get_line(Fd, ''),

    %% Try to search forward relative to the current position.

    ?line {ok, CurPos} = ?FILE_MODULE:position(Fd, {cur, 0}),
    ?line RealPos = 4273,
    ?line {ok, RealPos} = ?FILE_MODULE:position(Fd, {cur, RealPos-CurPos}),
    ?line RealProg = <<"<LI> Real Programmers aren't afraid to use GOTOs.\n">>,
    ?line RealProg = io:get_line(Fd, ''),

    %% Seek backward.

    ?line AfterTitle = length("<TITLE>"),
    ?line {ok, AfterTitle} = ?FILE_MODULE:position(Fd, AfterTitle),
    ?line Title = <<"Real Programmers Don't Use PASCAL</TITLE>\n">>,
    ?line Title = io:get_line(Fd, ''),

    %% Done.

    ?line ?FILE_MODULE:close(Fd),
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

read_cooked_tar_problem(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),

    ?line Data = ?config(data_dir, Config),
    ?line ProblemFile = filename:join(Data, "cooked_tar_problem.tar.gz"),
    ?line {ok,Fd} = ?FILE_MODULE:open(ProblemFile, [read,compressed,binary]),

    ?line {ok,34304} = file:position(Fd, 34304),
    ?line {ok,Bin} = file:read(Fd, 512),
    ?line 512 = byte_size(Bin),
    
    ?line {ok,34304+512+1024} = file:position(Fd, {cur,1024}),
    
    ?line ok = file:close(Fd),

    ?line test_server:timetrap_cancel(Dog),
    ok.


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

write_compressed(suite) -> [];
write_compressed(doc) -> [];
write_compressed(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line Priv = ?config(priv_dir, Config),
    ?line MyFile = filename:join(Priv, 
				 atom_to_list(?MODULE)++"_test.gz"),

    %% Write a file.

    ?line {ok, Fd} = ?FILE_MODULE:open(MyFile, [write, compressed]),
    ?line {ok, 0} = ?FILE_MODULE:position(Fd, 0),
    ?line Prefix = "hello\n",
    ?line End = "end\n",
    ?line ok = io:put_chars(Fd, Prefix),
    ?line {ok, 143} = ?FILE_MODULE:position(Fd, 143),
    ?line ok = io:put_chars(Fd, End),
    ?line ok = ?FILE_MODULE:close(Fd),

    %% Read the file and verify the contents.

    ?line {ok, Fd1} = ?FILE_MODULE:open(MyFile, [read, compressed]),
    ?line Prefix = io:get_line(Fd1, ''),
    ?line Second = lists:duplicate(143-length(Prefix), 0) ++ End,
    ?line Second = io:get_line(Fd1, ''),
    ?line ok = ?FILE_MODULE:close(Fd1),

    %% Verify succesful compression by uncompressing the file
    %% using zlib:gunzip/1.

    ?line {ok,Contents} = file:read_file(MyFile),
    ?line <<"hello\n",0:137/unit:8,"end\n">> = zlib:gunzip(Contents),

    %% Ensure that the file is compressed.

    TotalSize = 143 + length(End),
    case ?FILE_MODULE:read_file_info(MyFile) of
	{ok, #file_info{size=Size}} when Size < TotalSize ->
	    ok;
	{ok, #file_info{size=Size}} when Size == TotalSize ->
	    test_server:fail(file_not_compressed)
    end,

    %% Write again to ensure that the file is truncated.

    ?line {ok, Fd2} = ?FILE_MODULE:open(MyFile, [write, compressed]),
    ?line NewString = "aaaaaaaaaaa",
    ?line ok = io:put_chars(Fd2, NewString),
    ?line ok = ?FILE_MODULE:close(Fd2),
    ?line {ok, Fd3} = ?FILE_MODULE:open(MyFile, [read, compressed]),
    ?line {ok, NewString} = ?FILE_MODULE:read(Fd3, 1024),
    ?line ok = ?FILE_MODULE:close(Fd3),

    %% Done.

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

catenated_gzips(Config) when is_list(Config) ->
    ?line Priv = ?config(priv_dir, Config),
    ?line MyFile = filename:join(Priv, ?MODULE_STRING++"_test.gz"),

    First = "Hello, all good men going to search parties. ",
    Second = "Now I really need your help.",
    All = iolist_to_binary([First|Second]),
    ?line Cat = [zlib:gzip(First),zlib:gzip(Second)],
    
    ?line ok = file:write_file(MyFile, Cat),

    ?line {ok,Fd} = file:open(MyFile, [read,compressed,binary]),
    ?line {ok,All} = file:read(Fd, 100000),
    ?line ok = file:close(Fd),

    ok.


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

compress_errors(suite) -> [];
compress_errors(doc) -> [];
compress_errors(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line DataDir = 
	filename:dirname(
	  filename:join(?config(data_dir, Config), "x")),
    ?line DataDirSlash = DataDir++"/",
    ?line {error, enoent} = ?FILE_MODULE:open("non_existing__",
					      [compressed, read]),
    ?line {error, einval} = ?FILE_MODULE:open("non_existing__",
					      [compressed, read, write]),
    ?line {error, einval} = ?FILE_MODULE:open("non_existing__",
					      [compressed, read, append]),
    ?line {error, einval} = ?FILE_MODULE:open("non_existing__",
					      [compressed, write, append]),
    ?line {error, E1} = ?FILE_MODULE:open(DataDir, [compressed, read]),
    ?line {error, E2} = ?FILE_MODULE:open(DataDirSlash, [compressed, read]),
    ?line {error, E3} = ?FILE_MODULE:open(DataDir, [compressed, write]),
    ?line {error, E4} = ?FILE_MODULE:open(DataDirSlash, [compressed, write]),
    ?line {eisdir,eisdir,eisdir,eisdir} = {E1,E2,E3,E4},

    %% Read a corrupted .gz file.

    ?line Corrupted = filename:join(DataDir, "corrupted.gz"),
    ?line {ok, Fd} = ?FILE_MODULE:open(Corrupted, [read, compressed]),
    ?line {error, eio} = ?FILE_MODULE:read(Fd, 100),
    ?line ?FILE_MODULE:close(Fd),

    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

altname(doc) ->
    "Test the file:altname/1 function";
altname(suite) ->
    [];
altname(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line NewDir = filename:join(RootDir, 
				 "long alternative path name with spaces"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    ?line Name = filename:join(NewDir, "a_file_with_long_name"),
    ?line ShortName = filename:join(NewDir, "short"),
    ?line NonexName = filename:join(NewDir, "nonexistent"),
    ?line ok = ?FILE_MODULE:write_file(Name, "some contents\n"),
    ?line ok = ?FILE_MODULE:write_file(ShortName, "some contents\n"),
    ?line Result = 
	case ?FILE_MODULE:altname(NewDir) of
	    {error, enotsup} ->
		{skipped, "Altname not supported on this platform"};
	    {ok, "LONGAL~1"} -> 
		?line {ok, "A_FILE~1"} = ?FILE_MODULE:altname(Name),
		?line {ok, "C:/"} = ?FILE_MODULE:altname("C:/"),
		?line {ok, "C:\\"} = ?FILE_MODULE:altname("C:\\"),
		?line {error,enoent} = ?FILE_MODULE:altname(NonexName),
		?line {ok, "short"} = ?FILE_MODULE:altname(ShortName),
		ok
	end,
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    Result.


make_link(doc) -> "Test creating a hard link.";
make_link(suite) -> [];
make_link(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_make_link"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    
    ?line Name = filename:join(NewDir, "a_file"),
    ?line ok = ?FILE_MODULE:write_file(Name, "some contents\n"),
    
    ?line Alias = filename:join(NewDir, "an_alias"),
    ?line Result = 
	case ?FILE_MODULE:make_link(Name, Alias) of
	    {error, enotsup} ->
		{skipped, "Links not supported on this platform"};
	    ok ->
		%% Note: We take the opportunity to test 
		%% ?FILE_MODULE:read_link_info/1,
		%% which should in behave exactly as 
		%% ?FILE_MODULE:read_file_info/1
		%% since they are not used on symbolic links.
		
		?line {ok, Info} = ?FILE_MODULE:read_link_info(Name),
		?line {ok, Info} = ?FILE_MODULE:read_link_info(Alias),
		?line #file_info{links = 2, type = regular} = Info,
		?line {error, eexist} = 
		    ?FILE_MODULE:make_link(Name, Alias),
		ok
	end,
    
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    Result.

read_link_info_for_non_link(doc) ->
    "Test that reading link info for an ordinary file or directory works "
	"(on all platforms).";
read_link_info_for_non_link(suite) -> [];
read_link_info_for_non_link(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),

    ?line {ok, #file_info{type=directory}} = 
	?FILE_MODULE:read_link_info("."),
		  
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.

symlinks(doc) -> "Test operations on symbolic links (for Unix).";
symlinks(suite) -> [];
symlinks(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line NewDir = filename:join(RootDir, 
				 atom_to_list(?MODULE)
				 ++"_symlinks"),
    ?line ok = ?FILE_MODULE:make_dir(NewDir),
    
    ?line Name = filename:join(NewDir, "a_plain_file"),
    ?line ok = ?FILE_MODULE:write_file(Name, "some stupid content\n"),
    
    ?line Alias = filename:join(NewDir, "a_symlink_alias"),
    ?line Result = 
	case ?FILE_MODULE:make_symlink(Name, Alias) of
	    {error, enotsup} ->
		{skipped, "Links not supported on this platform"};
	    ok ->
		?line {ok, Info1} = ?FILE_MODULE:read_file_info(Name),
		?line {ok, Info1} = ?FILE_MODULE:read_file_info(Alias),
		?line {ok, Info1} = ?FILE_MODULE:read_link_info(Name),
		?line #file_info{links = 1, type = regular} = Info1,
		
		?line {ok, Info2} = ?FILE_MODULE:read_link_info(Alias),
		?line #file_info{links=1, type=symlink} = Info2,
		?line {ok, Name} = ?FILE_MODULE:read_link(Alias),
		ok
	  end,
    
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    Result.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

copy(doc) -> [];
copy(suite) -> [];
copy(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = ?config(priv_dir, Config),
    %% Create a text file.
    ?line Name1 = filename:join(RootDir, atom_to_list(?MODULE)++"_copy_1.txt"),
    ?line Line = "The quick brown fox jumps over a lazy dog. 0123456789\n",
    ?line Len = length(Line),
    ?line {ok, Handle1} = ?FILE_MODULE:open(Name1, [write]),
    ?line {_, Size1} = 
	iterate({0, 0},
		done,
		fun({_, S}) when S >= 128*1024 ->
			done;
		   ({N, S}) ->
			H = integer_to_list(N),
			ok = ?FILE_MODULE:write(Handle1, [H, " ", Line]),
			{N + 1, S + length(H) + 1 + Len}
		end),
    ?line ?FILE_MODULE:close(Handle1),
    %% Make a copy
    ?line Name2 = filename:join(RootDir, atom_to_list(?MODULE)++"_copy_2.txt"),
    ?line {ok, Size1} = ?FILE_MODULE:copy(Name1, Name2),
    %% Concatenate 1
    ?line Name3 = filename:join(RootDir, atom_to_list(?MODULE)++"_copy_3.txt"),
    ?line {ok, Handle3} = ?FILE_MODULE:open(Name3, [raw, write, binary]),
    ?line {ok, Size1} = ?FILE_MODULE:copy(Name1, Handle3),
    ?line {ok, Handle2} = ?FILE_MODULE:open(Name2, [read, binary]),
    ?line {ok, Size1} = ?FILE_MODULE:copy(Handle2, Handle3),
    ?line ok = ?FILE_MODULE:close(Handle3),
    ?line ok = ?FILE_MODULE:close(Handle2),
    %% Concatenate 2
    ?line Name4 = filename:join(RootDir, atom_to_list(?MODULE)++"_copy_4.txt"),
    ?line {ok, Handle4} = ?FILE_MODULE:open(Name4, [write, binary]),
    ?line {ok, Size1} = ?FILE_MODULE:copy(Name1, Handle4),
    ?line {ok, Handle5} = ?FILE_MODULE:open(Name2, [raw, read, binary]),
    ?line {ok, Size1} = ?FILE_MODULE:copy(Handle5, Handle4),
    ?line ok = ?FILE_MODULE:close(Handle5),
    ?line ok = ?FILE_MODULE:close(Handle4),
    %% %% Just for test of the test
    %% ?line {ok, Handle2q} = ?FILE_MODULE:open(Name2, [write, append]),
    %% ?line ok = ?FILE_MODULE:write(Handle2q, "q"),
    %% ?line ok = ?FILE_MODULE:close(Handle2q),
    %% Compare the files
    ?line {ok, Handle1a} = ?FILE_MODULE:open(Name1, [raw, read]),
    ?line {ok, Handle2a} = ?FILE_MODULE:open(Name2, [raw, read]),
    ?line true = stream_cmp(fd_stream_factory([Handle1a]), 
			    fd_stream_factory([Handle2a])),
    ?line {ok, 0} = ?FILE_MODULE:position(Handle1a, 0),
    ?line {ok, 0} = ?FILE_MODULE:position(Handle2a, 0),
    ?line {ok, Handle3a} = ?FILE_MODULE:open(Name3, [raw, read]),
    ?line true = stream_cmp(fd_stream_factory([Handle1a, Handle2a]), 
			    fd_stream_factory([Handle2a])),
    ?line ok = ?FILE_MODULE:close(Handle1a),
    ?line ok = ?FILE_MODULE:close(Handle2a),
    ?line ok = ?FILE_MODULE:close(Handle3a),
    ?line [] = flush(),
    ?line test_server:timetrap_cancel(Dog),
    ok.



fd_stream_factory([]) ->
    [];
fd_stream_factory([Fd | T] = L) ->
    fun() ->
	    case ?FILE_MODULE:read(Fd, 8192) of
		{ok, Data} when is_binary(Data) ->
		    binary_to_list(Data) ++ fd_stream_factory(L);
		{ok, Data} when is_list(Data) ->
		    Data ++ fd_stream_factory(L);
		eof ->
		    fd_stream_factory(T);
		{error, _} = Error ->
		    Error
	    end
    end.

		    

stream_cmp(F1, F2) when is_function(F1), is_function(F2) ->
    stream_cmp(F1(), F2());
stream_cmp(F, X) when is_function(F) ->
    stream_cmp(F(), X);
stream_cmp(X, F) when is_function(F) ->
    stream_cmp(X, F());
stream_cmp({error, _} = Error, _) ->
    Error;
stream_cmp(_, {error, _} = Error) ->
    Error;
stream_cmp([], []) ->
    true;
stream_cmp([], [_|_]) ->
    false;
stream_cmp([_|_], []) ->
    false;
stream_cmp([H | T1], [H | T2]) ->
    stream_cmp(T1, T2).

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%% Test the get_cwd(), open(), and copy() file server calls.
new_slave(_RootDir, Cwd) ->
    ?line L = "qwertyuiopasdfghjklzxcvbnm",
    ?line N = length(L),
    ?line {ok, Cwd}         = ?FILE_MODULE:get_cwd(),
    ?line {error, enotsup}  = ?FILE_MODULE:get_cwd("C:"), % Unix only testcase
    ?line {ok, FD1}         = ?FILE_MODULE:open("file1.txt", write),
    ?line ok                = ?FILE_MODULE:close(FD1),
    ?line {ok, FD2}         = ?FILE_MODULE:open("file1.txt", 
						[write, append, 
						 binary, compressed,
						 delayed_write,
						 {delayed_write, 0, 0},
						 read_ahead,
						 {read_ahead, 0}]),
    ?line ok                = ?FILE_MODULE:write(FD2, L),
    ?line ok                = ?FILE_MODULE:close(FD2),
    ?line {ok, N2}          = ?FILE_MODULE:copy("file1.txt", "file2.txt"),
    ?line io:format("Size ~p, compressed ~p.~n", [N, N2]),
    ?line {ok, FD3}         = ?FILE_MODULE:open("file2.txt", 
						[binary, compressed]),
    %% The file_io_server will translate the binary into a list
    ?line {ok, L}           = ?FILE_MODULE:read(FD3, N+1),
    ?line ok                = ?FILE_MODULE:close(FD3),
    %%
    ?line ok                = ?FILE_MODULE:delete("file1.txt"),
    ?line ok                = ?FILE_MODULE:delete("file2.txt"),
    ?line []                = flush(),
    ok.


%% Test the get_cwd() and open() file server calls.
old_slave(_RootDir, Cwd) ->
    ?line L = "qwertyuiopasdfghjklzxcvbnm",
    ?line N = length(L),
    ?line {ok, Cwd}         = ?FILE_MODULE:get_cwd(),
    ?line {error, enotsup}  = ?FILE_MODULE:get_cwd("C:"), % Unix only testcase
    ?line {ok, FD1}         = ?FILE_MODULE:open("file1.txt", write),
    ?line ok                = ?FILE_MODULE:close(FD1),
    ?line {ok, FD2}         = ?FILE_MODULE:open("file1.txt", 
						[write, binary, compressed]),
    ?line ok                = ?FILE_MODULE:write(FD2, L),
    ?line ok                = ?FILE_MODULE:close(FD2),
    ?line {ok, FD3}         = ?FILE_MODULE:open("file1.txt", [write, append]),
    ?line ok                = ?FILE_MODULE:close(FD3),
    ?line {ok, FD4}         = ?FILE_MODULE:open("file1.txt", 
						[binary, compressed]),
    %% The file_io_server will translate the binary into a list
    ?line {ok, L}           = ?FILE_MODULE:read(FD4, N+1),
    ?line ok                = ?FILE_MODULE:close(FD4),
    %%
    ?line ok                = ?FILE_MODULE:delete("file1.txt"),
    ?line []                = flush(),
    ok.

run_test(Test, Args) ->
    ?line case (catch apply(?MODULE, Test, Args)) of
	      {'EXIT', _} = Exit ->
		  {done, Exit, get(test_server_loc)};
	      Result ->
		  {done, Result}
	  end.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

delayed_write(suite) ->
    [];
delayed_write(doc) ->
    ["Tests the file open option {delayed_write, Size, Delay}"];

delayed_write(Config) when is_list(Config) ->
    ?line Dog = ?t:timetrap(?t:seconds(20)),
    %%
    ?line RootDir = ?config(priv_dir, Config),
    ?line File = filename:join(RootDir, 
			       atom_to_list(?MODULE)++"_delayed_write.txt"),
    ?line Data1 = "asdfghjkl",
    ?line Data2 = "qwertyuio",
    ?line Data3 = "zxcvbnm,.",
    ?line Size = length(Data1),
    ?line Size = length(Data2),
    ?line Size = length(Data3),
    ?line Data1Data1 = Data1++Data1,
    ?line Data1Data1Data1 = Data1Data1++Data1,
    ?line Data1Data1Data1Data1 = Data1Data1++Data1Data1,
    %%
    %% Test caching and normal close of non-raw file
    ?line {ok, Fd1} = 
	?FILE_MODULE:open(File, [write, {delayed_write, Size+1, 2000}]),
    ?line ok = ?FILE_MODULE:write(Fd1, Data1),
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Fd2} = ?FILE_MODULE:open(File, [read]),
    ?line case os:type() of
	      vxworks -> 
		  io:format("Line ~p skipped on vxworks", [?LINE]);
	      _ ->
		  ?line eof = ?FILE_MODULE:read(Fd2, 1)
	  end,
    ?line ok = ?FILE_MODULE:write(Fd1, Data1), % Data flush on size
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Data1Data1} = ?FILE_MODULE:pread(Fd2, bof, 2*Size+1),
    ?line ok = ?FILE_MODULE:write(Fd1, Data1),
    ?line ?t:sleep(3000), % Wait until data flush on timeout
    ?line {ok, Data1Data1Data1} = ?FILE_MODULE:pread(Fd2, bof, 3*Size+1),
    ?line ok = ?FILE_MODULE:write(Fd1, Data1),
    ?line ok = ?FILE_MODULE:close(Fd1), % Data flush on close
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Data1Data1Data1Data1} = ?FILE_MODULE:pread(Fd2, bof, 4*Size+1),
    ?line ok = ?FILE_MODULE:close(Fd2),
    %%
    %% Test implicit close through exit by file owning process, 
    %% raw file, default parameters.
    ?line Parent = self(),
    ?line Fun = 
	fun () ->
		Child = self(),
		Test = 
		    fun () ->
			    ?line {ok, Fd} = 
				?FILE_MODULE:open(File, 
						  [raw, write, 
						   delayed_write]),
			    ?line ok = ?FILE_MODULE:write(Fd, Data1),
			    ?line Parent ! {Child, wrote},
			    ?line receive 
				      {Parent, continue, Reason} -> 
					  {ok, Reason}
				  end
		    end,
		case (catch Test()) of
		    {ok, Reason} ->
			exit(Reason);
		    Unknown ->
			exit({Unknown, get(test_server_loc)})
		end
	end,
    ?line Child1 = spawn(Fun),
    ?line Mref1 = erlang:monitor(process, Child1),
    ?line receive 
	      {Child1, wrote} -> 
		  ok;
	      {'DOWN', Mref1, _, _, _} = Down1a ->
		  ?t:fail(Down1a)
	  end,
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Fd3} = ?FILE_MODULE:open(File, [read]),
    ?line case os:type() of
	      vxworks -> 
		  io:format("Line ~p skipped on vxworks", [?LINE]);
	      _ ->
		  ?line eof = ?FILE_MODULE:read(Fd3, 1)
	  end,
    ?line Child1 ! {Parent, continue, normal},
    ?line receive 
	      {'DOWN', Mref1, process, Child1, normal} -> 
		  ok;
	      {'DOWN', Mref1, _, _, _} = Down1b ->
		  ?t:fail(Down1b)
	  end,
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Data1} = ?FILE_MODULE:pread(Fd3, bof, Size+1),
    ?line ok = ?FILE_MODULE:close(Fd3),
    %%
    %% The same again, but this time with reason 'kill'.
    ?line Child2 = spawn(Fun),
    ?line Mref2 = erlang:monitor(process, Child2),
    ?line receive 
	      {Child2, wrote} -> 
		  ok;
	      {'DOWN', Mref2, _, _, _} = Down2a ->
		  ?t:fail(Down2a)
	  end,
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Fd4} = ?FILE_MODULE:open(File, [read]),
    ?line case os:type() of
	      vxworks -> 
		  io:format("Line ~p skipped on vxworks", [?LINE]);
	      _ ->
		  ?line eof = ?FILE_MODULE:read(Fd4, 1)
	  end,
    ?line Child2 ! {Parent, continue, kill},
    ?line receive 
	      {'DOWN', Mref2, process, Child2, kill} -> 
		  ok;
	      {'DOWN', Mref2, _, _, _} = Down2b ->
		  ?t:fail(Down2b)
	  end,
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line eof = ?FILE_MODULE:pread(Fd4, bof, 1),
    ?line ok = ?FILE_MODULE:close(Fd4),
    %%
    %% Test if file position works with delayed_write
    ?line {ok, Fd5} = ?FILE_MODULE:open(File, [raw, read, write, 
					       delayed_write]),
    ?line ok = ?FILE_MODULE:truncate(Fd5),
    ?line ok = ?FILE_MODULE:write(Fd5, [Data1|Data2]),
    ?line {ok, 0} = ?FILE_MODULE:position(Fd5, bof),
    ?line ok = ?FILE_MODULE:write(Fd5, [Data3]),
    ?line {ok, Data2} = ?FILE_MODULE:read(Fd5, Size+1),
    ?line {ok, 0} = ?FILE_MODULE:position(Fd5, bof),
    ?line Data3Data2 = Data3++Data2,
    ?line {ok, Data3Data2} = ?FILE_MODULE:read(Fd5, 2*Size+1),
    ?line ok = ?FILE_MODULE:close(Fd5),
    %%
    ?line [] = flush(),
    ?line ?t:timetrap_cancel(Dog),
    ?line case os:type() of
	      vxworks -> 
		  {comment, "Some lines skipped on vxworks"};
	      _ ->
		  ok
	  end.


pid2name(doc) -> "Tests file:pid2name/1.";
pid2name(suite) -> [];
pid2name(Config) when is_list(Config) ->
    ?line Dog = test_server:timetrap(test_server:seconds(10)),
    ?line RootDir = ?config(priv_dir, Config),
    ?line Base = test_server:temp_name(
		   filename:join(RootDir, "pid2name_")),
    ?line Name1 = [Base, '.txt'],
    ?line Name2 = Base ++ ".txt",
    %%
    ?line {ok, Pid} = file:open(Name1, [write]),
    ?line {ok, Name2} = file:pid2name(Pid),
    ?line undefined = file:pid2name(self()),
    ?line ok = file:close(Pid),
    ?line test_server:sleep(1000),
    ?line false = is_process_alive(Pid),
    ?line undefined = file:pid2name(Pid),
    %%
    ?line test_server:timetrap_cancel(Dog),
    ok.


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

read_ahead(suite) ->
    [];
read_ahead(doc) ->
    ["Tests the file open option {read_ahead, Size}"];

read_ahead(Config) when is_list(Config) ->
    ?line Dog = ?t:timetrap(?t:seconds(20)),
    %%
    ?line RootDir = ?config(priv_dir, Config),
    ?line File = filename:join(RootDir, 
			       atom_to_list(?MODULE)++"_read_ahead.txt"),
    ?line Data1 = "asdfghjkl", % Must be
    ?line Data2 = "qwertyuio", % same
    ?line Data3 = "zxcvbnm,.", % length
    ?line Size = length(Data1),
    ?line Size = length(Data2),
    ?line Size = length(Data3),
    %%
    %% Test caching of normal non-raw file
    ?line {ok, Fd1} = ?FILE_MODULE:open(File, [write]),
    ?line ok = ?FILE_MODULE:write(Fd1, [Data1|Data1]),
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Fd2} = ?FILE_MODULE:open(File, [read, {read_ahead, 2*Size}]),
    ?line {ok, Data1} = ?FILE_MODULE:read(Fd2, Size),
    ?line ok = ?FILE_MODULE:pwrite(Fd1, Size, Data2),
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Data1} = ?FILE_MODULE:read(Fd2, Size), % Will read cached data
    ?line Data2Data2Data2 = Data2++Data2++Data2,
    ?line ok = ?FILE_MODULE:pwrite(Fd1, eof, Data2Data2Data2),
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Data2Data2Data2} = 
	?FILE_MODULE:read(Fd2, 3*Size), % Read more than cache buffer
    ?line ok = ?FILE_MODULE:close(Fd1),
    ?line ok = ?FILE_MODULE:close(Fd2),
    %% Test caching of raw file and default parameters
    ?line {ok, Fd3} = ?FILE_MODULE:open(File, [raw, write]),
    ?line ok = ?FILE_MODULE:write(Fd3, [Data1|Data1]),
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Fd4} = ?FILE_MODULE:open(File, [raw, read, read_ahead]),
    ?line {ok, Data1} = ?FILE_MODULE:read(Fd4, Size),
    ?line ok = ?FILE_MODULE:pwrite(Fd3, Size, Data2),
    ?line ?t:sleep(1000), % Just in case the file system is slow
    ?line {ok, Data1} = ?FILE_MODULE:read(Fd4, Size), % Will read cached data
    ?line ok = ?FILE_MODULE:close(Fd3),
    ?line ok = ?FILE_MODULE:close(Fd4),
    %% Test if the file position works in combination with read_ahead
    ?line {ok, Fd5} = ?FILE_MODULE:open(File, [raw, read, write, read_ahead]),
    ?line ok = ?FILE_MODULE:truncate(Fd5),
    ?line ok = ?FILE_MODULE:write(Fd5, [Data1,Data1|Data3]),
    ?line {ok, 0} = ?FILE_MODULE:position(Fd5, bof),
    ?line {ok, Data1} = ?FILE_MODULE:read(Fd5, Size),
    ?line ok = ?FILE_MODULE:write(Fd5, Data2),
    ?line {ok, 0} = ?FILE_MODULE:position(Fd5, bof),
    ?line Data1Data2Data3 = Data1++Data2++Data3,
    ?line {ok, Data1Data2Data3} = ?FILE_MODULE:read(Fd5, 3*Size+1),
    ?line ok = ?FILE_MODULE:close(Fd5),
    %%
    ?line [] = flush(),
    ?line ?t:timetrap_cancel(Dog),
    ok.



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



segment_read(suite) ->
    [];
segment_read(doc) ->
    ["Tests the segmenting of large reads"];
segment_read(Config) when is_list(Config) ->
    ?line Dog = ?t:timetrap(?t:seconds(60)),
    %%
    ?line Name = filename:join(?config(priv_dir, Config),
			       ?MODULE_STRING ++ "_segment_read"),
    ?line SegSize = 256*1024,
    ?line SegCnt = SegSize div 4,
    ?line Cnt = 4 * SegCnt,
    ?line ok = create_file(Name, Cnt),
    %% 
    %% read_file/1
    %%
    ?line {ok, Bin} = ?FILE_MODULE:read_file(Name),
    ?line true = verify_bin(Bin, 0, Cnt),
    %%
    %% read/2
    %%
    %% Not segmented
    ?line {ok, FD1} = ?FILE_MODULE:open(Name, [read, raw, binary]),
    ?line {ok, B1a} = ?FILE_MODULE:read(FD1, SegSize),
    ?line {ok, B1b} = ?FILE_MODULE:read(FD1, SegSize),
    ?line {ok, B1c} = ?FILE_MODULE:read(FD1, SegSize),
    ?line {ok, B1d} = ?FILE_MODULE:read(FD1, SegSize),
    ?line ok = ?FILE_MODULE:close(FD1),
    ?line true = verify_bin(B1a, 0*SegCnt, SegCnt),
    ?line true = verify_bin(B1b, 1*SegCnt, SegCnt),
    ?line true = verify_bin(B1c, 2*SegCnt, SegCnt),
    ?line true = verify_bin(B1d, 3*SegCnt, SegCnt),
    %%
    %% Segmented
    ?line {ok, FD2} = ?FILE_MODULE:open(Name, [read, raw, binary]),
    ?line {ok, B2a} = ?FILE_MODULE:read(FD2, 1*SegSize),
    ?line {ok, B2b} = ?FILE_MODULE:read(FD2, 2*SegSize),
    ?line {ok, B2c} = ?FILE_MODULE:read(FD2, 2*SegSize),
    ?line ok = ?FILE_MODULE:close(FD2),
    ?line true = verify_bin(B2a, 0*SegCnt, 1*SegCnt),
    ?line true = verify_bin(B2b, 1*SegCnt, 2*SegCnt),
    ?line true = verify_bin(B2c, 3*SegCnt, 1*SegCnt),
    %%
    %% pread/3
    %%
    ?line {ok, FD3} = ?FILE_MODULE:open(Name, [read, raw, binary]),
    %%
    %% Not segmented
    ?line {ok, B3d} = ?FILE_MODULE:pread(FD3, 3*SegSize, SegSize),
    ?line {ok, B3c} = ?FILE_MODULE:pread(FD3, 2*SegSize, SegSize),
    ?line {ok, B3b} = ?FILE_MODULE:pread(FD3, 1*SegSize, SegSize),
    ?line {ok, B3a} = ?FILE_MODULE:pread(FD3, 0*SegSize, SegSize),
    ?line true = verify_bin(B3a, 0*SegCnt, SegCnt),
    ?line true = verify_bin(B3b, 1*SegCnt, SegCnt),
    ?line true = verify_bin(B3c, 2*SegCnt, SegCnt),
    ?line true = verify_bin(B3d, 3*SegCnt, SegCnt),
    %%
    %% Segmented
    ?line {ok, B3g} = ?FILE_MODULE:pread(FD3, 3*SegSize, 2*SegSize),
    ?line {ok, B3f} = ?FILE_MODULE:pread(FD3, 1*SegSize, 2*SegSize),
    ?line {ok, B3e} = ?FILE_MODULE:pread(FD3, 0*SegSize, 1*SegSize),
    ?line true = verify_bin(B3e, 0*SegCnt, 1*SegCnt),
    ?line true = verify_bin(B3f, 1*SegCnt, 2*SegCnt),
    ?line true = verify_bin(B3g, 3*SegCnt, 1*SegCnt),
    %%
    ?line ok = ?FILE_MODULE:close(FD3),
    %%
    %% pread/2
    %%
    ?line {ok, FD5} = ?FILE_MODULE:open(Name, [read, raw, binary]),
    %%
    %% +---+---+---+---+
    %% | 4 | 3 | 2 | 1 |
    %% +---+---+---+---+
    %% <       ^       >
    ?line {ok, [B5d, B5c, B5b, B5a]} = 
	?FILE_MODULE:pread(FD5, [{3*SegSize, SegSize},
				 {2*SegSize, SegSize},
				 {1*SegSize, SegSize},
				 {0*SegSize, SegSize}]),
    ?line true = verify_bin(B5a, 0*SegCnt, SegCnt),
    ?line true = verify_bin(B5b, 1*SegCnt, SegCnt),
    ?line true = verify_bin(B5c, 2*SegCnt, SegCnt),
    ?line true = verify_bin(B5d, 3*SegCnt, SegCnt),
    %%
    %% +---+-------+-------+
    %% | 3 |   2   |   1   |
    %% +---+-------+-------+
    %% <     ^     ^   >
    ?line {ok, [B5g, B5f, B5e]} = 
	?FILE_MODULE:pread(FD5, [{3*SegSize, 2*SegSize},
				 {1*SegSize, 2*SegSize},
				 {0*SegSize, 1*SegSize}]),
    ?line true = verify_bin(B5e, 0*SegCnt, 1*SegCnt),
    ?line true = verify_bin(B5f, 1*SegCnt, 2*SegCnt),
    ?line true = verify_bin(B5g, 3*SegCnt, 1*SegCnt),
    %%
    %%
    %% +-------+-----------+
    %% |   2   |     1     |
    %% +-------+-----------+
    %% <     ^     ^   >
    ?line {ok, [B5i, B5h]} = 
	?FILE_MODULE:pread(FD5, [{2*SegSize, 3*SegSize},
				 {0*SegSize, 2*SegSize}]),
    ?line true = verify_bin(B5h, 0*SegCnt, 2*SegCnt),
    ?line true = verify_bin(B5i, 2*SegCnt, 2*SegCnt),
    %%
    %% +-------+---+---+
    %% |   3   | 2 | 1 |
    %% +-------+---+---+
    %% <     ^     ^   >
    ?line {ok, [B5l, B5k, B5j]} = 
	?FILE_MODULE:pread(FD5, [{3*SegSize, 1*SegSize},
				 {2*SegSize, 1*SegSize},
				 {0*SegSize, 2*SegSize}]),
    ?line true = verify_bin(B5j, 0*SegCnt, 2*SegCnt),
    ?line true = verify_bin(B5k, 2*SegCnt, 1*SegCnt),
    ?line true = verify_bin(B5l, 3*SegCnt, 1*SegCnt),
    %%
    %% Real time response time test.
    %%
    Req = lists:flatten(lists:duplicate(17,
					[{2*SegSize, 2*SegSize},
					 {0*SegSize, 2*SegSize}])),
    ?line {{ok, _}, Comment} = 
	response_analysis(?FILE_MODULE, pread, [FD5, Req]),
    ?line ok = ?FILE_MODULE:close(FD5),
    %%
    ?line [] = flush(),
    ?line ?t:timetrap_cancel(Dog),
    {comment, Comment}.



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



segment_write(suite) ->
    [];
segment_write(doc) ->
    ["Tests the segmenting of large writes"];
segment_write(Config) when is_list(Config) ->
    ?line Dog = ?t:timetrap(?t:seconds(60)),
    %%
    ?line Name = filename:join(?config(priv_dir, Config),
			       ?MODULE_STRING ++ "_segment_write"),
    ?line SegSize = 256*1024,
    ?line SegCnt = SegSize div 4,
    ?line Cnt = 4 * SegCnt,
    ?line Bin = create_bin(0, Cnt),
    %%
    %% write/2
    %%
    %% Not segmented
    ?line {ok, FD1} = ?FILE_MODULE:open(Name, [write, raw, binary]),
    ?line ok = ?FILE_MODULE:write(FD1, subbin(Bin, 0*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:write(FD1, subbin(Bin, 1*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:write(FD1, subbin(Bin, 2*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:write(FD1, subbin(Bin, 3*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:close(FD1),
    ?line true = verify_file(Name, Cnt),
    %%
    %% Segmented
    ?line {ok, FD2} = ?FILE_MODULE:open(Name, [write, raw, binary]),
    ?line ok = ?FILE_MODULE:write(FD2, subbin(Bin, 0*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:write(FD2, subbin(Bin, 1*SegSize, 2*SegSize)),
    ?line ok = ?FILE_MODULE:write(FD2, subbin(Bin, 3*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:close(FD2),
    ?line true = verify_file(Name, Cnt),
    %%
    %% +---+---+---+---+
    %% |   |   |   |   |
    %% +---+---+---+---+
    %% <       ^       >
    ?line ok = write_file(Name, [subbin(Bin, 0*SegSize, 1*SegSize),
				 subbin(Bin, 1*SegSize, 1*SegSize),
				 subbin(Bin, 2*SegSize, 1*SegSize),
				 subbin(Bin, 3*SegSize, 1*SegSize)]),
    ?line true = verify_file(Name, Cnt),
    %%
    %% +---+-------+---+
    %% |   |       |   |
    %% +---+-------+---+
    %% <     ^     ^   >
    ?line ok = write_file(Name, [subbin(Bin, 0*SegSize, 1*SegSize),
				 subbin(Bin, 1*SegSize, 2*SegSize),
				 subbin(Bin, 3*SegSize, 1*SegSize)]),
    ?line true = verify_file(Name, Cnt),
    %%
    %% +-------+-------+
    %% |       |       |
    %% +-------+-------+
    %% <     ^     ^   >
    ?line ok = write_file(Name, [subbin(Bin, 0*SegSize, 2*SegSize),
				 subbin(Bin, 2*SegSize, 2*SegSize)]),
    ?line true = verify_file(Name, Cnt),
    %%
    %% +-------+---+---+
    %% |       |   |   |
    %% +-------+---+---+
    %% <     ^     ^   >
    ?line ok = write_file(Name, [subbin(Bin, 0*SegSize, 2*SegSize),
				 subbin(Bin, 2*SegSize, 1*SegSize),
				 subbin(Bin, 3*SegSize, 1*SegSize)]),
    ?line true = verify_file(Name, Cnt),
    %%
    %% pwrite/3
    %%
    %% Not segmented
    ?line {ok, FD3} = ?FILE_MODULE:open(Name, [write, raw, binary]),
    ?line ok = ?FILE_MODULE:pwrite(FD3, 3*SegSize, 
				   subbin(Bin, 3*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:pwrite(FD3, 2*SegSize, 
				   subbin(Bin, 2*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:pwrite(FD3, 1*SegSize, 
				   subbin(Bin, 1*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:pwrite(FD3, 0*SegSize, 
				   subbin(Bin, 0*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:close(FD3),
    ?line true = verify_file(Name, Cnt),
    %%
    %% Segmented
    ?line {ok, FD4} = ?FILE_MODULE:open(Name, [write, raw, binary]),
    ?line ok = ?FILE_MODULE:pwrite(FD4, 3*SegSize, 
				   subbin(Bin, 3*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:pwrite(FD4, 1*SegSize, 
				   subbin(Bin, 1*SegSize, 2*SegSize)),
    ?line ok = ?FILE_MODULE:pwrite(FD4, 0*SegSize, 
				   subbin(Bin, 0*SegSize, 1*SegSize)),
    ?line ok = ?FILE_MODULE:close(FD4),
    ?line true = verify_file(Name, Cnt),



    %%
    %% pwrite/2
    %%
    %% Not segmented
    ?line {ok, FD5} = ?FILE_MODULE:open(Name, [write, raw, binary]),
    ?line ok = ?FILE_MODULE:pwrite(FD5, [{3*SegSize,
					  subbin(Bin, 3*SegSize, 1*SegSize)}]),
    ?line ok = ?FILE_MODULE:pwrite(FD5, [{2*SegSize,
					  subbin(Bin, 2*SegSize, 1*SegSize)}]),
    ?line ok = ?FILE_MODULE:pwrite(FD5, [{1*SegSize,
					  subbin(Bin, 1*SegSize, 1*SegSize)}]),
    ?line ok = ?FILE_MODULE:pwrite(FD5, [{0*SegSize,
					  subbin(Bin, 0*SegSize, 1*SegSize)}]),
    ?line ok = ?FILE_MODULE:close(FD5),
    ?line true = verify_file(Name, Cnt),
    %%
    %% Segmented
    ?line {ok, FD6} = ?FILE_MODULE:open(Name, [write, raw, binary]),
    ?line ok = ?FILE_MODULE:pwrite(FD6, [{3*SegSize,
					  subbin(Bin, 3*SegSize, 1*SegSize)}]),
    ?line ok = ?FILE_MODULE:pwrite(FD6, [{1*SegSize,
					  subbin(Bin, 1*SegSize, 2*SegSize)}]),
    ?line ok = ?FILE_MODULE:pwrite(FD6, [{0*SegSize,
					  subbin(Bin, 0*SegSize, 1*SegSize)}]),
    ?line ok = ?FILE_MODULE:close(FD6),
    ?line true = verify_file(Name, Cnt),
    %%
    %% +---+---+---+---+
    %% | 4 | 3 | 2 | 1 |
    %% +---+---+---+---+
    %% <       ^       >
    ?line ok = pwrite_file(Name, [{3*SegSize, 
				   subbin(Bin, 3*SegSize, 1*SegSize)},
				  {2*SegSize, 
				   subbin(Bin, 2*SegSize, 1*SegSize)},
				  {1*SegSize, 
				   subbin(Bin, 1*SegSize, 1*SegSize)},
				  {0*SegSize, 
				   subbin(Bin, 0*SegSize, 1*SegSize)}]),
    ?line true = verify_file(Name, Cnt),
    %%
    %% +---+-------+---+
    %% | 3 |   2   | 1 |
    %% +---+-------+---+
    %% <     ^     ^   >
    ?line ok = pwrite_file(Name, [{3*SegSize, 
				   subbin(Bin, 3*SegSize, 1*SegSize)},
				  {1*SegSize, 
				   subbin(Bin, 1*SegSize, 2*SegSize)},
				  {0*SegSize, 
				   subbin(Bin, 0*SegSize, 1*SegSize)}]),
    ?line true = verify_file(Name, Cnt),
    %%
    %% +-------+-------+
    %% |   2   |   1   |
    %% +-------+-------+
    %% <     ^     ^   >
    ?line ok = pwrite_file(Name, [{2*SegSize, 
				   subbin(Bin, 2*SegSize, 2*SegSize)},
				  {0*SegSize, 
				   subbin(Bin, 0*SegSize, 2*SegSize)}]),
    ?line true = verify_file(Name, Cnt),
    %%
    %% +-------+---+---+
    %% |   3   | 2 | 1 |
    %% +-------+---+---+
    %% <     ^     ^   >
    ?line ok = pwrite_file(Name, [{3*SegSize, 
				   subbin(Bin, 3*SegSize, 1*SegSize)},
				  {2*SegSize, 
				   subbin(Bin, 2*SegSize, 1*SegSize)},
				  {0*SegSize, 
				   subbin(Bin, 0*SegSize, 2*SegSize)}]),
    ?line true = verify_file(Name, Cnt),
    %%
    %% Real time response time test.
    %%
    ?line {ok, FD7} = ?FILE_MODULE:open(Name, [write, raw, binary]),
    Req = lists:flatten(lists:duplicate(17,
					[{2*SegSize, 
					  subbin(Bin, 2*SegSize, 2*SegSize)},
					{0*SegSize, 
					 subbin(Bin, 0*SegSize, 2*SegSize)}])),
    ?line {ok, Comment} = 
	response_analysis(?FILE_MODULE, pwrite, [FD7, Req]),
    ?line ok = ?FILE_MODULE:close(FD7),
    %%
    ?line [] = flush(),
    ?line ?t:timetrap_cancel(Dog),
    {comment, Comment}.


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ipread(suite) ->
    [];
ipread(doc) ->
    ["Test Dets special indirect pread"];
ipread(Config) when is_list(Config) ->
    ?line Dog = ?t:timetrap(?t:seconds(30)),
    %%
    ?line Dir = ?config(priv_dir, Config),
    ?line ok = ipread_int(Dir, [raw, binary]),
    ?line ok = ipread_int(Dir, [raw]),
    ?line ok = ipread_int(Dir, [binary]),
    ?line ok = ipread_int(Dir, []),
    ?line ok = ipread_int(Dir, [ram, binary]),
    ?line ok = ipread_int(Dir, [ram]),
    %%
    ?line [] = flush(),
    ?line ?t:timetrap_cancel(Dog),
    ok.

ipread_int(Dir, ModeList) ->
    ?line Name = 
	filename:join(Dir, 
		      lists:flatten([?MODULE_STRING, "_ipread",
		       lists:map(fun (X) ->
					 ["_", atom_to_list(X)]
				 end,
				 ModeList)])),
    ?line io:format("ipread_int<~p, ~p>~n", [Name, ModeList]),
    ?line {Conv, Sizeof} = 
	case lists:member(binary, ModeList) of
	    true ->
		{fun (Bin) when is_binary(Bin) -> Bin;
		     (List) when is_list(List) -> list_to_binary(List)
		 end, 
		 {erlang, size}};
	    false ->
		{fun (Bin) when is_binary(Bin) -> binary_to_list(Bin);
		     (List) when is_list(List) -> List
		 end, 
		 {erlang, length}}
	end,
    ?line Pos = 4711,
    ?line Data = Conv("THE QUICK BROWN FOX JUMPS OVER A LAZY DOG"),
    ?line Size = Sizeof(Data),
    ?line Init = Conv("                 "),
    ?line SizeInit = Sizeof(Init),
    ?line Head = Conv(<<Size:32/big-unsigned, Pos:32/big-unsigned>>),
    ?line Filler = Conv(bytes($ , Pos-SizeInit-Sizeof(Head))),
    ?line Size1 = Size+1,
    ?line SizePos = Size+Pos,
    %%
    ?line {ok, FD} = ?FILE_MODULE:open(Name, [write, read | ModeList]),
    ?line ok = ?FILE_MODULE:truncate(FD),
    ?line ok = ?FILE_MODULE:write(FD, Init),
    ?line ok = ?FILE_MODULE:write(FD, Head),
    ?line ok = ?FILE_MODULE:write(FD, Filler),
    ?line ok = ?FILE_MODULE:write(FD, Data),
    %% Correct read
    ?line {ok, {Size, Pos, Data}} = 
	?FILE_MODULE:ipread_s32bu_p32bu(FD, SizeInit, infinity),
    %% Invalid header - size > max
    ?line eof = 
	?FILE_MODULE:ipread_s32bu_p32bu(FD, SizeInit, Size-1),
    %% Data block protudes over eof
    ?line ok = 
	?FILE_MODULE:pwrite(FD, SizeInit, 
			    <<Size1:32/big-unsigned, 
			     Pos:32/big-unsigned>>),
    ?line {ok, {Size1, Pos, Data}} = 
	?FILE_MODULE:ipread_s32bu_p32bu(FD, SizeInit, Size1),
    %% Data block outside file
    ?line ok =
	?FILE_MODULE:pwrite(FD, SizeInit, 
			    <<Size:32/big-unsigned, 
			     SizePos:32/big-unsigned>>),
    ?line {ok, {Size, SizePos, eof}} =
	?FILE_MODULE:ipread_s32bu_p32bu(FD, SizeInit, Size),
    %% Zero size
    ?line ok = 
	?FILE_MODULE:pwrite(FD, SizeInit, 
			    <<0:32/big-unsigned, 
			     Pos:32/big-unsigned>>),
    ?line {ok, {0, Pos, eof}} = 
	?FILE_MODULE:ipread_s32bu_p32bu(FD, SizeInit, Size),
    %% Invalid header - protudes over eof
    ?line eof = 
	?FILE_MODULE:ipread_s32bu_p32bu(FD, 
					Pos+Size-(Sizeof(Head)-1), 
					infinity),
    %% Header not even in file
    ?line eof = 
	?FILE_MODULE:ipread_s32bu_p32bu(FD, Pos+Size, infinity),
    %%
    ?line ok = ?FILE_MODULE:close(FD),
    ok.



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

interleaved_read_write(suite) ->
    [];
interleaved_read_write(doc) ->
    ["Tests interleaved read and writes"];
interleaved_read_write(Config) when is_list(Config) ->
    ?line Dog = ?t:timetrap(?t:seconds(30)),
    %%
    ?line Dir = ?config(priv_dir, Config),
    ?line File = 
	filename:join(Dir, ?MODULE_STRING++"interleaved_read_write.txt"),
    ?line {ok,F1} = ?FILE_MODULE:open(File, [write]),
    ?line ok = ?FILE_MODULE:write(F1, "data---r1."), % 10 chars each
    ?line ok = ?FILE_MODULE:write(F1, "data---r2."),
    ?line ok = ?FILE_MODULE:write(F1, "data---r3."),
    ?line ok = ?FILE_MODULE:close(F1),
    ?line {ok,F2} = ?FILE_MODULE:open(File, [read, write]),
    ?line {ok, "data---r1."} = ?FILE_MODULE:read(F2, 10),
    ?line ok = ?FILE_MODULE:write(F2, "data---w2."),
    ?line ok = ?FILE_MODULE:close(F2),
    ?line {ok,F3} = ?FILE_MODULE:open(File, [read]),
    ?line {ok, "data---r1."} = ?FILE_MODULE:read(F3, 10),
    ?line {ok, "data---w2."} = ?FILE_MODULE:read(F3, 10),
    ?line {ok, "data---r3."} = ?FILE_MODULE:read(F3, 10),
    ?line eof = ?FILE_MODULE:read(F3, 1),
    ?line ok = ?FILE_MODULE:close(F2),
    %%
    ?line [] = flush(),
    ?line ?t:timetrap_cancel(Dog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

otp_5814(suite) ->
    [];
otp_5814(doc) ->
    ["OTP-5814. eval/consult/script return correct line numbers"];
otp_5814(Config) when is_list(Config) ->
    ?line Dog = ?t:timetrap(?t:seconds(10)),
    PrivDir = ?config(priv_dir, Config),
    File = filename:join(PrivDir, "otp_5814"),
    Path = [PrivDir],
    ?line ok = file:write_file(File, <<"{a,b,c}.
                                        a.
                                        b.
                                        c.
                                        {d,e,
                                        [}.">>),
    ?line {error, {6,erl_parse,_}} = file:eval(File),
    ?line {error, {6,erl_parse,_}} = file:consult(File),
    ?line {error, {6,erl_parse,_}} = file:path_consult(Path, File),
    ?line {error, {6,erl_parse,_}} = file:path_eval(Path, File),
    ?line {error, {6,erl_parse,_}} = file:script(File),
    ?line {error, {6,erl_parse,_}} = file:path_script(Path, File),

    ?line ok = file:write_file(File, <<>>),
    ?line {error, {1,file,undefined_script}} = file:path_script(Path, File),

    %% The error is not propagated...
    ?line ok = file:write_file(File, <<"a.
                                        b.
                                        1/0.">>),
    ?line {error, {3, file, {error, badarith, _}}} = file:eval(File),
    
    ?line ok = file:write_file(File, <<"erlang:raise(throw, apa, []).">>),
    ?line {error, {1, file, {throw, apa, _}}} = file:eval(File),

    file:delete(File),
    ?line ?t:timetrap_cancel(Dog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

large_file(suite) ->
    [];
large_file(doc) ->
    ["Tests positioning in large files (> 4G)"];
large_file(Config) when is_list(Config) ->
    case {os:type(),os:version()} of
	{{win32,nt},_} ->
	    do_large_file(Config);
	{{unix,sunos},{A,B,C}}
	when A == 5, B == 5, C >= 1;   A == 5, B >= 6;   A >= 6 ->
	    do_large_file(Config);
	{{unix,Unix},_} when Unix =/= sunos ->
	    N = unix_free(Config),
	    io:format("Free: ~w KByte~n", [N]),
	    if N < 5 * (1 bsl 20) ->
		    %% Less than 5 GByte free
		    {skipped,"Less than 5 GByte free"};
	       true ->
		    do_large_file(Config)
	    end;
	_ -> 
	    {skipped,"Only supported on Win32, Unix or SunOS >= 5.5.1"}
    end.

unix_free(Config) ->
    Cmd = ["df -k '",?config(priv_dir, Config),"'"],
    DF0 = os:cmd(Cmd),
    io:format("$ ~s~n~s", [Cmd,DF0]),
    [$\n|DF1] = lists:dropwhile(fun ($\n) -> false; (_) -> true end, DF0),
    {ok,[N],_} = io_lib:fread(" ~*s ~d", DF1),
    N.

do_large_file(Config) ->
    ?line Watchdog = ?t:timetrap(?t:minutes(5)),
    %%
    ?line Name = filename:join(?config(priv_dir, Config),
			       ?MODULE_STRING ++ "_large_file"),
    ?line Tester = self(),
    Deleter = 
	spawn(
	  fun() ->
		  Mref = erlang:monitor(process, Tester),
		  receive
		      {'DOWN',Mref,_,_,_} -> ok;
		      {Tester,done} -> ok
		  end,
		  ?FILE_MODULE:delete(Name)
	  end),
    %%
    ?line S = "1234567890",
    L = length(S),
    R = lists:reverse(S),
    P = 1 bsl 32,
    Ss = lists:sort(S),
    Rs = lists:reverse(Ss),
    ?line {ok,F}  = ?FILE_MODULE:open(Name, [raw,read,write]),
    ?line ok      = ?FILE_MODULE:write(F, S),
    ?line {ok,P}  = ?FILE_MODULE:position(F, P),
    ?line ok      = ?FILE_MODULE:write(F, R),
    ?line {ok,0}  = ?FILE_MODULE:position(F, bof),
    ?line {ok,S}  = ?FILE_MODULE:read(F, L),
    ?line {ok,P}  = ?FILE_MODULE:position(F, {eof,-L}),
    ?line {ok,R}  = ?FILE_MODULE:read(F, L+1),
    ?line {ok,S}  = ?FILE_MODULE:pread(F, 0, L),
    ?line {ok,R}  = ?FILE_MODULE:pread(F, P, L+1),
    ?line ok      = ?FILE_MODULE:pwrite(F, 0, Ss),
    ?line ok      = ?FILE_MODULE:pwrite(F, P, Rs),
    ?line {ok,0}  = ?FILE_MODULE:position(F, bof),
    ?line {ok,Ss} = ?FILE_MODULE:read(F, L),
    ?line {ok,P}  = ?FILE_MODULE:position(F, {eof,-L}),
    ?line {ok,Rs} = ?FILE_MODULE:read(F, L+1),
    ?line ok      = ?FILE_MODULE:close(F),
    %% Reopen the file with 'append'; used to fail on Windows causing
    %% writes to go to the beginning of the file for files > 4GB.
    ?line PL = P + L,
    ?line PLL = PL + L,
    ?line {ok,F1}  = ?FILE_MODULE:open(Name, [raw,read,write,append]),
    ?line ok       = ?FILE_MODULE:write(F1, R),
    ?line {ok,PLL} = ?FILE_MODULE:position(F1, {cur,0}),
    ?line {ok,Rs}  = ?FILE_MODULE:pread(F1, P, L),
    ?line {ok,PL}  = ?FILE_MODULE:position(F1, {eof,-L}),
    ?line {ok,R}   = ?FILE_MODULE:read(F1, L+1),
    ?line ok       = ?FILE_MODULE:close(F1),
    %%
    ?line Mref = erlang:monitor(process, Deleter),
    ?line Deleter ! {Tester,done},
    ?line receive {'DOWN',Mref,_,_,_} -> ok end,
    %%
    ?line ?t:timetrap_cancel(Watchdog),
    ok.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



response_analysis(Module, Function, Arguments) ->
    Parent = self(),
    ?line erlang:yield(), % Schedule out before test
    ?line Child = 
	spawn_link(
	  fun () ->
		  receive {Parent, start, Ts} -> ok end,
		  Stat = 
		      iterate(response_stat(response_stat(init, Ts),
					    erlang:now()), 
			      done,
			      fun (S) ->
				      erlang:yield(),
				      receive
					  {Parent, stop} ->
					      done
				      after 0 ->
					      response_stat(S, erlang:now())
				      end
			      end),
		  Parent ! {self(), stopped, response_stat(Stat, erlang:now())}
	  end),
    ?line Child ! {Parent, start, erlang:now()},
    ?line Result = apply(Module, Function, Arguments),
    ?line Child ! {Parent, stop},
    ?line {N, Sum, _, M, Max} = receive {Child, stopped, X} -> X end,
    ?line Mean_ms = (0.001*Sum) / (N-1),
    ?line Max_ms = 0.001 * Max,
    ?line Comment = 
	lists:flatten(
	  io_lib:format(
	    "Scheduling interval: Mean = ~.3f ms, "
	    ++"Max = ~.3f ms for no ~p of ~p.~n",
	    [Mean_ms, Max_ms, M, (N-1)])),
    ?line {Result, Comment}.
    


response_stat(init, Ts) ->
    {0, 0, Ts, 0, 0};
response_stat({N, Sum, {A1, B1, C1}, M, Max}, {A2, B2, C2} = Ts) ->
    D = C2-C1 + 1000000*((B2-B1) + 1000000*(A2-A1)),
    if D > Max ->
	    {N+1, Sum+D, Ts, N, D};
       true ->
	    {N+1, Sum+D, Ts, M, Max}
    end.



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



%% This function is kept just for benchmarking reasons.
%% create_file/2 below is some 44 times faster.

create_file_slow(Name, N) when is_integer(N), N >= 0 ->
    ?line {ok, FD} = 
	?FILE_MODULE:open(Name, [raw, write, delayed_write, binary]),
    ?line ok = create_file_slow(FD, 0, N),
    ?line ok = ?FILE_MODULE:close(FD),
    ok.

create_file_slow(_FD, M, M) ->
    ok;
create_file_slow(FD, M, N) ->
    ok = ?FILE_MODULE:write(FD, <<M:32/unsigned>>),
    create_file_slow(FD, M+1, N).



%% Creates a file 'Name' containing 'N' unsigned 32 bit integers 
%% from 0 to N-1.

create_file(Name, N) when is_integer(N), N >= 0 ->
    ?line {ok, FD} = 
	?FILE_MODULE:open(Name, [raw, write, delayed_write, binary]),
    ?line ok = create_file(FD, 0, N),
    ?line ok = ?FILE_MODULE:close(FD),
    ok.

create_file(_FD, M, M) ->
    ok;
create_file(FD, M, N) when M + 1024 =< N ->
    create_file(FD, M, M + 1024, []),
    create_file(FD, M + 1024, N);
create_file(FD, M, N) ->
    create_file(FD, M, N, []).

create_file(FD, M, M, R) ->
    ok = ?FILE_MODULE:write(FD, R);
create_file(FD, M, N0, R) when M + 8 =< N0 ->
    N1  = N0-1,  N2  = N0-2,  N3  = N0-3,  N4  = N0-4, 
    N5  = N0-5,  N6  = N0-6,  N7  = N0-7,  N8  = N0-8, 
    create_file(FD, M, N8, 
		  [<<N8:32/unsigned,  N7:32/unsigned, 
		    N6:32/unsigned,  N5:32/unsigned, 
		    N4:32/unsigned,  N3:32/unsigned, 
		    N2:32/unsigned,  N1:32/unsigned>> | R]);
create_file(FD, M, N0, R) ->
    N1 = N0-1,
    create_file(FD, M, N1, [<<N1:32/unsigned>> | R]).



create_bin(M, N) when is_integer(M), is_integer(N), N >= 0, M >= 0 ->
    create_bin(M, M+N, []).

create_bin(N, N, R) ->
    list_to_binary(R);
create_bin(M, N0, R) when M+8 =< N0 ->
    N1  = N0-1,  N2  = N0-2,  N3  = N0-3,  N4  = N0-4, 
    N5  = N0-5,  N6  = N0-6,  N7  = N0-7,  N8  = N0-8, 
    create_bin(M, N8,
	       [<<N8:32/unsigned,  N7:32/unsigned, 
		 N6:32/unsigned,  N5:32/unsigned, 
		 N4:32/unsigned,  N3:32/unsigned, 
		 N2:32/unsigned,  N1:32/unsigned>> | R]);
create_bin(M, N0, R) ->
    N1 = N0-1,
    create_bin(M, N1, [<<N1:32/unsigned>> | R]).
    
    


verify_bin(<<>>, _, 0) ->
    true;
verify_bin(<<>>, _, _) ->
    false;
verify_bin(Bin, N, Cnt) ->
    N0 = N + 0, N1 = N + 1, N2 = N + 2, N3 = N + 3, 
    N4 = N + 4, N5 = N + 5, N6 = N + 6, N7 = N + 7, 
    case Bin of
	<<N0:32/unsigned, N1:32/unsigned, N2:32/unsigned, N3:32/unsigned, 
	 N4:32/unsigned, N5:32/unsigned, N6:32/unsigned, N7:32/unsigned,
	 B/binary>> ->
	    verify_bin(B, N+8, Cnt-8);
	<<N:32/unsigned, B/binary>> ->
	    verify_bin(B, N+1, Cnt-1);
	_ ->
	    false
    end.



verify_file(Name, N) when is_integer(N), N >= 0 ->
    case ?FILE_MODULE:open(Name, [raw, read, binary]) of
	{ok, FD} ->
	    Result = verify_file(FD, 0, 64*1024, N),
	    ok = ?FILE_MODULE:close(FD),
	    Result;
	Error ->
	    Error
    end.

verify_file(FD, N, _, N) ->
    case ?FILE_MODULE:read(FD, 1) of
	eof ->
	    true;
	{ok, _} ->
	    false
    end;
verify_file(FD, M, Cnt, N) when M+Cnt =< N ->
    case ?FILE_MODULE:read(FD, 4*Cnt) of
	{ok, Bin} ->
	    case verify_bin(Bin, M, Cnt) of
		true ->
		    verify_file(FD, M+Cnt, Cnt, N);
		false ->
		    false
	    end;
	_ ->
	    false
    end;
verify_file(FD, M, _Cnt, N) ->
    verify_file(FD, M, N-M, N).



subbin(Bin, M, N) ->
    <<_:M/binary, B:N/binary, _/binary>> = Bin,
    B.



write_file(Name, Data) ->
    case ?FILE_MODULE:open(Name, [raw, write, binary]) of
	{ok, FD} ->
	    Result = ?FILE_MODULE:write(FD, Data),
	    case {Result, ?FILE_MODULE:close(FD)} of
		{ok, R} -> R;
		_ -> Result
	    end;
	Error ->
	    Error
    end.

pwrite_file(Name, Data) ->
    case ?FILE_MODULE:open(Name, [raw, write, binary]) of
	{ok, FD} ->
	    Result = ?FILE_MODULE:pwrite(FD, Data),
	    case {Result, ?FILE_MODULE:close(FD)} of
		{ok, R} -> R;
		_ -> Result
	    end;
	Error ->
	    Error
    end.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Read_line tests
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


read_line_testdata(PrivDir) ->
    All0 = [{fun read_line_create0/1,"Testdata1.txt",5,10},
	   {fun read_line_create1/1,"Testdata2.txt",401,802},
	   {fun read_line_create2/1,"Testdata3.txt",1,2},
	   {fun read_line_create3/1,"Testdata4.txt",601,fail},
	   {fun read_line_create4/1,"Testdata5.txt",601,1002},
	   {fun read_line_create5/1,"Testdata6.txt",601,1202},
	   {fun read_line_create6/1,"Testdata7.txt",601,1202},
	   {fun read_line_create7/1,"Testdata8.txt",4001,8002}],
    [ {A,filename:join([PrivDir,B]),C,D} || {A,B,C,D} <- All0 ].

read_line_create_files(TestData) ->
    [ Function(File) || {Function,File,_,_} <- TestData ].

read_line_remove_files(TestData) ->
    [ file:delete(File) || {_Function,File,_,_} <- TestData ].

read_line_1(suite) -> 
    [];
read_line_1(doc) ->
    ["read_line with prim_file"];
read_line_1(Config) when is_list(Config) ->
    ?line PrivDir = ?config(priv_dir, Config),
    ?line All = read_line_testdata(PrivDir),
    ?line read_line_create_files(All),
    ?line [ begin 
		io:format("read_line_all: ~s~n",[File]),
		{X,_} = read_line_all(File),
		true
	    end || {_,File,X,_} <- All ],
    ?line [ begin 
		io:format("read_line_all_alternating: ~s~n",[File]),
		{Y,_} = read_line_all_alternating(File),
		true
	    end || {_,File,_,Y} <- All , Y =/= fail],
    ?line [ begin 
		io:format("read_line_all_alternating (failing as should): ~s~n",[File]),
		{'EXIT',_} = (catch read_line_all_alternating(File)),
		true
	    end || {_,File,_,Y} <- All , Y =:= fail],
    ?line read_line_remove_files(All),
    ok.
read_line_2(suite) -> 
    [];
read_line_2(doc) ->
    ["read_line with file"];
read_line_2(Config) when is_list(Config) ->
    ?line PrivDir = ?config(priv_dir, Config),
    ?line All = read_line_testdata(PrivDir),
    ?line read_line_create_files(All),
    ?line [ begin 
		io:format("read_line_all: ~s~n",[File]),
		{X,_} = read_line_all2(File),
		true
	    end || {_,File,X,_} <- All ],
    ?line [ begin 
		io:format("read_line_all_alternating: ~s~n",[File]),
		{Y,_} = read_line_all_alternating2(File),
		true
	    end || {_,File,_,Y} <- All , Y =/= fail],
    ?line [ begin 
		io:format("read_line_all_alternating (failing as should): ~s~n",[File]),
		{'EXIT',_} = (catch read_line_all_alternating2(File)),
		true
	    end || {_,File,_,Y} <- All , Y =:= fail],
    ?line read_line_remove_files(All),
    ok.
read_line_3(suite) -> 
    [];
read_line_3(doc) ->
    ["read_line with raw file"];
read_line_3(Config) when is_list(Config) ->
    ?line PrivDir = ?config(priv_dir, Config),
    ?line All = read_line_testdata(PrivDir),
    ?line read_line_create_files(All),
    ?line [ begin 
		io:format("read_line_all: ~s~n",[File]),
		{X,_} = read_line_all3(File),
		true
	    end || {_,File,X,_} <- All ],
    ?line [ begin 
		io:format("read_line_all_alternating: ~s~n",[File]),
		{Y,_} = read_line_all_alternating3(File),
		true
	    end || {_,File,_,Y} <- All , Y =/= fail],
    ?line [ begin 
		io:format("read_line_all_alternating (failing as should): ~s~n",[File]),
		{'EXIT',_} = (catch read_line_all_alternating3(File)),
		true
	    end || {_,File,_,Y} <- All , Y =:= fail],
    ?line read_line_remove_files(All),
    ok.
read_line_4(suite) -> 
    [];
read_line_4(doc) ->
    ["read_line with raw buffered file"];
read_line_4(Config) when is_list(Config) ->
    ?line PrivDir = ?config(priv_dir, Config),
    ?line All = read_line_testdata(PrivDir),
    ?line read_line_create_files(All),
    ?line [ begin 
		io:format("read_line_all: ~s~n",[File]),
		{X,_} = read_line_all4(File),
		true
	    end || {_,File,X,_} <- All ],
    ?line [ begin 
		io:format("read_line_all_alternating: ~s~n",[File]),
		{Y,_} = read_line_all_alternating4(File),
		true
	    end || {_,File,_,Y} <- All , Y =/= fail],
    ?line [ begin 
		io:format("read_line_all_alternating (failing as should): ~s~n",[File]),
		{'EXIT',_} = (catch read_line_all_alternating4(File)),
		true
	    end || {_,File,_,Y} <- All , Y =:= fail],
    ?line read_line_remove_files(All),
    ok.

rl_lines() ->
    [ <<"hej">>,<<"hopp">>,<<"i">>,<<"lingon\rskogen">>].

read_line_create0(Filename) ->
    {ok,F} = file:open(Filename,[write]),
    L = rl_lines(),
    [ file:write(F,[R,<<"\r\n">>]) || R <- L ], 
    file:write(F,<<"Inget radslut\r">>),
    file:close(F).
read_line_create1(Filename) ->
    {ok,F} = file:open(Filename,[write]),
    L = rl_lines(),
    [ begin
	  [ file:write(F,[R,<<"\r\n">>]) || R <- L ], 
	  file:write(F,<<"Inget radslut\r">>)
      end || _ <- lists:seq(1,100)],
    file:close(F).
read_line_create2(Filename) ->
    {ok,F} = file:open(Filename,[write]),
    L = rl_lines(),
    [ begin
	  [ file:write(F,[R]) || R <- L ], 
	  file:write(F,<<"Inget radslut\r">>)
      end || _ <- lists:seq(1,200)],
    file:write(F,<<"\r\n">>),
    file:close(F).

read_line_create3(Filename) ->
    {ok,F} = file:open(Filename,[write]),
    L = rl_lines(),
    [ begin
	  file:write(F,<<"\r\n">>),
	  file:write(F,<<"\r\n">>),
	  [ file:write(F,[R,<<"\r\n">>]) || R <- L ], 
	  file:write(F,<<"Inget radslut\r">>)
      end || _ <- lists:seq(1,100)],
    file:close(F).

read_line_create4(Filename) ->
    {ok,F} = file:open(Filename,[write]),
    L = rl_lines(),
    [ begin
	  file:write(F,<<"\n">>),
	  file:write(F,<<"\n">>),
	  [ file:write(F,[R,<<"\r\n">>]) || R <- L ], 
	  file:write(F,<<"Inget radslut\r">>)
      end || _ <- lists:seq(1,100)],
    file:close(F).

read_line_create5(Filename) ->
    {ok,F} = file:open(Filename,[write]),
    L = rl_lines(),
    [ begin
	  file:write(F,<<"i\n">>),
	  file:write(F,<<"i\n">>),
	  [ file:write(F,[R,<<"\r\n">>]) || R <- L ], 
	  file:write(F,<<"Inget radslut\r">>)
      end || _ <- lists:seq(1,100)],
    file:close(F).

read_line_create6(Filename) ->
    {ok,F} = file:open(Filename,[write]),
    L = rl_lines(),
    [ begin
	  file:write(F,<<"i\r\n">>),
	  file:write(F,<<"i\r\n">>),
	  [ file:write(F,[R,<<"\r\n">>]) || R <- L ], 
	  file:write(F,<<"Inget radslut\r">>)
      end || _ <- lists:seq(1,100)],
    file:close(F).
read_line_create7(Filename) ->
    {ok,F} = file:open(Filename,[write]),
    L = rl_lines(),
    [ begin
	  [ file:write(F,[R,<<"\r\n">>]) || R <- L ], 
	  file:write(F,<<"Inget radslut\r">>)
      end || _ <- lists:seq(1,1000)],
    file:close(F).

read_line_all(Filename) ->
    {ok,F} = prim_file:open(Filename,[read,binary]),
    X=read_rl_lines(F),
    prim_file:close(F),
    Bin = list_to_binary([B || {ok,B} <- X]),
    Bin = re:replace(list_to_binary([element(2,file:read_file(Filename))]),
		     "\r\n","\n",[global,{return,binary}]),
    {length(X),Bin}.

read_line_all2(Filename) ->
    {ok,F} = file:open(Filename,[read,binary]),
    X=read_rl_lines2(F),
    file:close(F),
    Bin = list_to_binary([B || {ok,B} <- X]),
    Bin = re:replace(list_to_binary([element(2,file:read_file(Filename))]),
		     "\r\n","\n",[global,{return,binary}]),
    {length(X),Bin}.

read_line_all3(Filename) ->
    {ok,F} = file:open(Filename,[read,binary,raw]),
    X=read_rl_lines2(F),
    file:close(F),
    Bin = list_to_binary([B || {ok,B} <- X]),
    Bin = re:replace(list_to_binary([element(2,file:read_file(Filename))]),
		     "\r\n","\n",[global,{return,binary}]),
    {length(X),Bin}.
read_line_all4(Filename) ->
    {ok,F} = file:open(Filename,[read,binary,raw,{read_ahead,8192}]),
    X=read_rl_lines2(F),
    file:close(F),
    Bin = list_to_binary([B || {ok,B} <- X]),
    Bin = re:replace(list_to_binary([element(2,file:read_file(Filename))]),
		     "\r\n","\n",[global,{return,binary}]),
    {length(X),Bin}.

read_rl_lines(F) ->
    case prim_file:read_line(F) of
	eof ->
	    [];
	{error,X} ->
	    {error,X};
	List ->
	    [List | read_rl_lines(F)]
    end.

read_rl_lines2(F) ->
    case file:read_line(F) of
	eof ->
	    [];
	{error,X} ->
	    {error,X};
	List ->
	    [List | read_rl_lines2(F)]
    end.

read_line_all_alternating(Filename) ->
    {ok,F} = prim_file:open(Filename,[read,binary]),
    X=read_rl_lines(F,true),
    prim_file:close(F),
    Bin = list_to_binary([B || {ok,B} <- X]),
    Bin = re:replace(list_to_binary([element(2,file:read_file(Filename))]),
		     "\r\n","\n",[global,{return,binary}]),
    {length(X),Bin}.

read_line_all_alternating2(Filename) ->
    {ok,F} = file:open(Filename,[read,binary]),
    X=read_rl_lines2(F,true),
    file:close(F),
    Bin = list_to_binary([B || {ok,B} <- X]),
    Bin = re:replace(list_to_binary([element(2,file:read_file(Filename))]),
		     "\r\n","\n",[global,{return,binary}]),
    {length(X),Bin}.
read_line_all_alternating3(Filename) ->
    {ok,F} = file:open(Filename,[read,binary,raw]),
    X=read_rl_lines2(F,true),
    file:close(F),
    Bin = list_to_binary([B || {ok,B} <- X]),
    Bin = re:replace(list_to_binary([element(2,file:read_file(Filename))]),
		     "\r\n","\n",[global,{return,binary}]),
    {length(X),Bin}.
read_line_all_alternating4(Filename) ->
    {ok,F} = file:open(Filename,[read,binary,raw,{read_ahead,8192}]),
    X=read_rl_lines2(F,true),
    file:close(F),
    Bin = list_to_binary([B || {ok,B} <- X]),
    Bin = re:replace(list_to_binary([element(2,file:read_file(Filename))]),
		     "\r\n","\n",[global,{return,binary}]),
    {length(X),Bin}.

read_rl_lines(F,Alternate) ->
    case begin
	     case Alternate of
		 true -> prim_file:read(F,1);
		 false -> prim_file:read_line(F)
	     end 
	 end of
	eof ->
	    [];
	{error,X} ->
	    {error,X};
	List ->
	    [List | read_rl_lines(F,not Alternate)]
    end.
read_rl_lines2(F,Alternate) ->
    case begin
	     case Alternate of
		 true -> file:read(F,1);
		 false -> file:read_line(F)
	     end 
	 end of
	eof ->
	    [];
	{error,X} ->
	    {error,X};
	List ->
	    [List | read_rl_lines2(F,not Alternate)]
    end.


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

bytes(B, N)
  when is_integer(B), 0 =< B, B =< 255, is_integer(N), N > 2, N band 1 == 0 ->
    [bytes(B, N bsr 1), bytes(B, N bsr 1)];
bytes(B, 0)
  when is_integer(B), 0 =< B, B =< 255 ->
    [];
bytes(B, 2)
  when is_integer(B), 0 =< B, B =< 255 ->
    [B, B];
bytes(B, N)
  when is_integer(B), 0 =< B, B =< 255, is_integer(N), N > 0 ->
    [B, bytes(B, N-1)].


%% A simple loop construct.
%%
%% Calls 'Fun' with argument 'Start' first and then repeatedly with
%% its returned value (state) until 'Fun' returns 'Stop'. Then
%% the last state value that was not 'Stop' is returned.

iterate(Start, Done, Fun) when is_function(Fun) ->
    iterate(Start, Done, Fun, Start).

iterate(Done, Done, _Fun, I) ->
    I;
iterate(I, Done, Fun, _) ->
    iterate(Fun(I), Done, Fun, I).



flush() ->
    flush([]).

flush(Msgs) ->
    receive
	Msg ->
	    flush([Msg | Msgs])
    after 0 ->
	    lists:reverse(Msgs)
    end.