This file is indexed.

/usr/share/psychtoolbox-3/PsychtoolboxPostInstallRoutine.m is in psychtoolbox-3-common 3.0.11.20131230.dfsg1-1build1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
function PsychtoolboxPostInstallRoutine(isUpdate, flavor)
% PsychtoolboxPostInstallRoutine(isUpdate [, flavor])
%
% Psychtoolbox post installation routine. You should not call this
% function directly! This routine is called by DownloadPsychtoolbox,
% or UpdatePsychtoolbox after a successfull download/update of
% Psychtoolbox. The routine performs tasks that are common to
% downloads and updates, so they can share their code/implementation.
%
% As PsychtoolboxPostInstallRoutine itself is downloaded or updated,
% it can contain code specific to each Psychtoolbox revision/release
% to perform special setup procedures for new features, to announce
% important info to the user, whatever...
%
% Currently the routine performs the following tasks:
%
% 1. Clean up the Matlab/Octave path to Psychtoolbox: Remove unneeded .svn subfolders.
% 2. Contact the Psychtoolbox server to perform online registration of this
%    working copy of Psychtoolbox.
% 3. Add the PsychJava subfolder to the static Matlab class-path if neccessary.
%    This enables the Java-based GetChar support on Matlab.
% 4. Add the PsychStartup.m routine to Matlab's startup.m file on Windows.
% 5. Perform post-installation checks and basic troubleshooting.

%
% History:
% 23/06/2006 Written (MK).
% 17/09/2006 Made working on Matlab-5 and Octave. Made more robust. (MK)
% 22/09/2006 Replace system copy commands by Matlabs copyfile() - More
%            robust (MK).
% 14/10/2006 Update web page pointers at end, just to point at new wiki (DHB).
% 28/10/2006 Accept 'current' as synonym for 'beta'. (DHB)
% 23/05/2007 Add Matlab R2007 vs. earlier detection to Windows version (MK).
% 16/04/2008 Write/Read PTB flavor to/from users PsychtoolboxConfigDir as well for higher robustness (MK).
% 15/04/2009 Add warning about unsupported OS/X systems older than Tiger (MK).
% 15/06/2009 Add support for postinstall for Octave-3.2.x, remove Octave-2 support (MK).
% 03/01/2010 Extend Matlab R2007 vs. earlier detection for Windows up to year 2014 (MK).
% 03/04/2010 Move PsychtoolboxRegistration to the end, after all real
%            installation has been finished. Add additional error-checking
%            and troubleshooting for peculiarities of Octave on Windows. (MK)
% 05/27/2010 Update instructions for downloading the vcredist_x86.exe
%            security update for users of MS-Windows. (MK)
% 12/27/2010 Add check for unsupported Matlab versions prior to V6.5. (MK)
% 10/31/2011 Add call to SwitchToNewPsychtoolboxHoster for switch to
%            GoogleCode, if needed. (MK)
% 01/06/2012 Add support for calling PsychLinuxConfiguration on Linux. (MK)
% 04/30/2012 Add support for 64-Bit OSX. (MK)
% 06/13/2012 Removed call to SwitchToNewPsychtoolboxHoster, no longer needed (DN)
% 07/10/2012 Use textscan() on R2012a+ and verLessThan() to detect R2007a+ (MK)
% 09/05/2012 Update support for 64-Bit Octave and versions > 3.2. (MK)
% 09/13/2012 Add startup.m setup for 64-Bit Matlab + 64-Bit Windows. (MK)
% 09/14/2012 Cancel support for Octave on MS-Windows. (MK)
% 09/14/2012 Cancel support for 32-Bit Octave on OSX. (MK)
% 11/11/2012 More cleanup. E.g., don't warn about Octave > 3.2 anymore. (MK)
% 04/16/2013 Use javaclasspath.txt instead of classpath.txt on R2013a and later. (MK)
% 05/13/2013 Factor out Java classpath setup to call to PsychJaveTrouble(1). (MK)
% 07/02/2013 Drop support for 32-Bit Matlab on OSX, and thereby for 32-Bit OSX. (MK)
% 07/02/2013 Drop support for OSX versions older than 10.6 "Snow Leopard". (MK)
% 09/12/2013 Setup PsychStartup.m in startup.m for 32-Bit Windows as well. (MK)

fprintf('\n\nRunning post-install routine...\n\n');

if nargin < 1
   error('PsychtoolboxPostInstallRoutine: Required argument isUpdate missing!');
end;

if nargin < 2
    % No flavor provided: Default to 'unknown', but try to determine it from the
    % flavor file if this is an update.
    flavor = 'unknown';
    try
        if isUpdate>0
            % This is an update of an existing working copy. Check if flavor-file
            % is available:
            flavorfile = [PsychtoolboxRoot 'ptbflavorinfo.txt'];
            if exist(flavorfile, 'file')
                fd=fopen(flavorfile);
                if fd > -1
                    flavor = fscanf(fd, '%s');
                    fclose(fd);
                end
            end
            
            % Still unknown?
            if strcmp(flavor, 'unknown')
                % Yep: Retry in users PsychtoolboxConfigDir:
                flavorfile = [PsychtoolboxConfigDir 'ptbflavorinfo.txt'];
                if exist(flavorfile, 'file')
                    fd=fopen(flavorfile);
                    if fd > -1
                        flavor = fscanf(fd, '%s');
                        fclose(fd);
                    end
                end
            end
        end
    catch %#ok<*CTCH>
        fprintf('Info: Failed to determine flavor of this Psychtoolbox. Not a big deal...\n');
    end
else
    % Handle 'current' as synonym for 'beta', and 'unsupported' as synonym
    % for former 'stable'.
    switch (flavor)
        case 'current'
            flavor = 'beta';
        case 'unsupported'
            flavor = 'stable';
    end
    
    % Flavor provided: Write it into the flavor file for use by later update calls:
    try
        flavorfile = [PsychtoolboxRoot 'ptbflavorinfo.txt'];
        fd=fopen(flavorfile, 'wt');
        if fd > -1
            fprintf(fd, '%s\n', flavor);
            fclose(fd);
        end
    catch
        fprintf('Info: Failed to store flavor of this Psychtoolbox to file. Not a big deal...\n');
        % Retry with users PsychtoolboxConfigDir:
        try
            flavorfile = [PsychtoolboxConfigDir 'ptbflavorinfo.txt'];
            fd=fopen(flavorfile, 'wt');
            if fd > -1
                fprintf(fd, '%s\n', flavor);
                fclose(fd);
            end
        catch
            fprintf('Info: Failed to store flavor of this Psychtoolbox to file a 2nd time. Not a big deal...\n');
        end
    end
end

% Get rid of any remaining .svn folders in the path.
try
    path(RemoveSVNPaths);
    if exist('savepath') %#ok<EXIST>
        savepath;
    else
        path2rc;
    end
catch
    fprintf('Info: Failed to remove .svn subfolders from path. Not a big deal...\n');
end

% Octave on Windows? This is unsupported as of Version 3.0.10.
if IsWin && IsOctave
    error('Use of GNU/Octave on MS-Windows with Psychtoolbox 3.0.10 is no longer supported. Aborted.');
end

% 32-Bit Octave or 32-Bit Matlab on OSX? This is unsupported as of Version 3.0.11.
if IsOSX && ~Is64Bit
    fprintf('Psychtoolbox 3.0.11 and later do no longer work with 32-Bit versions of Octave or Matlab on OSX.\n');
    fprintf('You need to upgrade to a 64-Bit version of Octave or Matlab on OSX, which is fully supported.\n');
    fprintf('You can also use the alternate download function DownloadLegacyPsychtoolbox() to download\n');
    fprintf('an old legacy copy of Psychtoolbox-3.0.9, which did support 32-Bit Octave 3.2 on OSX, or use\n');
    fprintf('DownloadPsychtoolbox() with flavor ''Psychtoolbox-3.0.10'', which does support 32-Bit Matlab on OSX.\n');
    error('Tried to setup on 32-Bit Octave, which is no longer supported on OSX.');
end

% Check if our own startup function is part of the startup file and add it,
% if it isn't already part of it. Currently we only need this for MS-Windows.
if IsWin
    % Is it already implanted? Then we ain't nothing to do:
    if ~IsPsychStartupImplantedInStartup
        % Nope. Does a proper file already exist?
        whereisit = which('startup.m');
        if isempty(whereisit)
            % No: Create our own one.
            whereisit = [PsychtoolboxRoot 'PsychInitialize' filesep 'startup.m'];
            fprintf('Creating a startup.m file for Psychtoolbox at %s\n', whereisit);
        else
            fprintf('Adding PsychStartup() call to Matlab startup.m file for Psychtoolbox at %s\n', whereisit);            
        end
        
        % whereisit points to the location of the existing or to be created
        % file. Open (or create) it in append mode:
        try
            fd = fopen(whereisit, 'a');
            fprintf(fd, '\n');
            fprintf(fd, '%% Call Psychtoolbox-3 specific startup function:\n');
            fprintf(fd, 'if exist(''PsychStartup''), PsychStartup; end;\n');
            fprintf(fd, '\n');
            fclose(fd);
        catch
            fprintf('WARNING: Failed to update or create startup.m file to add a call to PsychStartup()! Trouble ahead.\n');
        end
    end
    
    % Execute our startup function once manually, so it works already for
    % this session:
    PsychStartup;
end

% Check for operating system minor version on Mac OS/X.
if IsOSX
    % Query kernel version via system() call:
    [s, did]=system('uname -r');
    if s == 0
        % Parse string for kernel major number, then translate to OS
        % minor version by subtracting 4:
        minorver = sscanf(did, '%i') - 4;
    else
        % Failed to query: Assume we're good for now...
        minorver = inf;
    end
    
    % Is the operating system minor version 'minorver' < 6?
    if minorver < 6
        % Yes. This is MacOSX 10.5 or earlier, i.e., older than 10.6
        % Snow Leopard. PTB will not work on such an old system:
        fprintf('\n\n\n\n\n\n\n\n==== WARNING WARNING WARNING WARNING ====\n\n');
        fprintf('Your operating system is Mac OS/X version 10.%i.\n\n', minorver);
        fprintf('This release of Psychtoolbox-3 is not compatible\n');
        fprintf('to OSX versions older than 10.6 "Snow Leopard".\n');
        fprintf('That means that almost all functionality will not work!\n\n');
        fprintf('You can either download an older version of Psychtoolbox\n');
        fprintf('onto your system to get better results. See our Wiki for help.\n');
        fprintf('Better though, update your operating system to at least version\n');
        fprintf('10.6.8 "Snow Leopard" or later.\n');
        fprintf('\n\n\n==== WARNING WARNING WARNING WARNING ====\n\n\n');
        fprintf('Press any key on keyboard to try to continue with setup, although\n');
        fprintf('this will likely fail soon and leave you with a dysfunctional toolbox.\n\n');
        pause;
    end
end

% Matlab specific setup:
if ~IsOctave
    % Check if this is Matlab of version prior to V 7.4:
    v = ver('matlab');
    if ~isempty(v)
        v = v(1).Version; v = sscanf(v, '%i.%i.%i');
        if (v(1) < 7) || ((v(1) == 7) && (v(2) < 4))
            % Matlab version < 7.4 detected. This is no longer
            % supported.
            fprintf('\n\nYou are using a Matlab version older than Version 7.4.\n');
            fprintf('The current "beta" flavor is no longer compatible with your version of Matlab.\n');
            fprintf('Current "beta" only works on Matlab Version 7.4 (R2007a) or later.\n\n');
            fprintf('I will try to finish setup, but most functions will not work for you.\n');
            fprintf('Please run the legacy DownloadLegacyPsychtoolbox() downloader to download an outdated,\n');
            fprintf('but functional older version of Psychtoolbox (e.g., V3.0.9) for your Matlab setup or to\n');
            fprintf('receive further instructions.\n');
            fprintf('\n\nPress any key to continue after you have read and understood above message completely.\n\n');
            pause;
        end
    end
end

% Special case handling for Octave:
if IsOctave
    % GNU/Octave. Need to prepend the proper folder with
    % the pseudo-MEX files to path:
    rc = 0; %#ok<NASGU>
    rdir = '';
    
    try
        % Remove binary MEX folders from path:
        if exist([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3LinuxFiles'], 'dir')
            rmpath([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3LinuxFiles']);
        end
        
        if exist([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3LinuxFiles64'], 'dir')
            rmpath([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3LinuxFiles64']);
        end
        
        if exist([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3LinuxFilesARM'], 'dir')
            rmpath([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3LinuxFilesARM']);
        end
        
        if exist([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3OSXFiles'], 'dir')
            rmpath([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3OSXFiles']);
        end
        
        if exist([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3OSXFiles64'], 'dir')
            rmpath([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3OSXFiles64']);
        end
        
        if exist([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3WindowsFiles'], 'dir')
            rmpath([PsychtoolboxRoot 'PsychBasic' filesep 'Octave3WindowsFiles']);
        end
        
        % Encode prefix and Octave major version of proper folder:
        octavev = sscanf(version, '%i.%i');
        octavemajorv = octavev(1);
        octaveminorv = octavev(2);
        
        rdir = [PsychtoolboxRoot 'PsychBasic' filesep 'Octave' num2str(octavemajorv)];
        
        % Add proper OS dependent postfix:
        if IsLinux
            rdir = [rdir 'LinuxFiles'];
        end
        
        if IsOSX
            rdir = [rdir 'OSXFiles'];
        end
        
        if IsWin
            rdir = [rdir 'WindowsFiles'];
        end
        
        if IsARM
            % ARM processor architecture:
            rdir = [rdir 'ARM'];
        end

        if Is64Bit
            % 64 bit Octave. Select 64 bit mex file folder:
            rdir = [rdir '64'];
        end
        
        fprintf('Octave major version %i detected. Will prepend the following folder to your Octave path:\n', octavemajorv);
        fprintf(' %s ...\n', rdir);
        addpath(rdir);
        
        rc = savepath;
    catch
        rc = 2;
    end

    if rc > 0
        fprintf('=====================================================================\n');
        fprintf('ERROR: Failed to prepend folder %s to Octave path!\n', rdir);
        fprintf('ERROR: This will likely cause complete failure of PTB to work.\n');
        fprintf('ERROR: Please fix the problem (maybe insufficient permissions?)\n');
        fprintf('ERROR: If everything else fails, add this folder manually to the\n');
        fprintf('ERROR: top of your Octave path.\n');
        fprintf('ERROR: Trying to continue but will likely fail soon.\n');
        fprintf('=====================================================================\n\n');
    end
    
    if (octavemajorv < 3) || (octavemajorv == 3 && octaveminorv < 2)
        fprintf('\n\n=================================================================================\n');
        fprintf('WARNING: Your version %s of Octave is obsolete. We strongly recommend\n', version);
        if IsLinux
            % On Linux everything >= 3.2 is fine:
            fprintf('WARNING: using the latest stable version of the Octave 3.2.x series or later for use with Psychtoolbox.\n');
        else
            % On other OS'es we only care about >= 3.6 atm:
            fprintf('WARNING: using the latest stable version of the Octave 3.6.x series or later for use with Psychtoolbox.\n');
        end
        fprintf('WARNING: Stuff may not work at all or only suboptimal with earlier versions and we\n');
        fprintf('WARNING: don''t provide any support for such old versions.\n');
        fprintf('\nPress any key to continue with setup.\n');
        fprintf('=================================================================================\n\n');
        pause;
    end
    
    try
        % Rehash the Octave toolbox cache:
        path(path);
        rehash;
        clear WaitSecs;
    catch
        fprintf('WARNING: Rehashing the Octave toolbox cache failed. I may fail and recommend\n');
        fprintf('WARNING: quitting and restarting Octave, then retry.\n');
    end
    
    try
        % Try if WaitSecs MEX file works...
        WaitSecs(0.1);
    catch
        % Failed! Either screwed setup of path or missing runtime
        % libraries.
        fprintf('ERROR: WaitSecs-MEX does not work, most likely other MEX files will not work either.\n');
        fprintf('ERROR: One reason might be that your version %s of Octave is incompatible. We recommend\n', version);        
        fprintf('ERROR: use of the latest stable version of Octave-3 as announced on the www.octave.org website.\n');
        fprintf('ERROR: Another conceivable reason would be missing or incompatible required system libraries on your system.\n\n');
        fprintf('ERROR: After fixing the problem, restart this installation/update routine.\n\n');
        fprintf('\n\nInstallation aborted. Fix the reported problem and retry.\n\n');
        return;
    end
    
    % End of special Octave setup.
end

% Special case handling for different Matlab releases on MS-Windoze:
if IsWin
    rc = 0; %#ok<NASGU>
    
    if strfind(cd,'system32')
        % the below code fails if the current directory is system32 (e.g.
        % C:\Windows\system32), as it contains dlls like version.dll, which
        % get called instead of the built-in functions....
        cd(PsychtoolboxRoot);
    end
    
    try
        % Remove DLL folders from path:
        rmpath([PsychtoolboxRoot 'PsychBasic\MatlabWindowsFilesR2007a\']);
        
        % Is this a Release2007a (Version 7.4.0) or later Matlab?
        if ~exist('verLessThan') || verLessThan('matlab', '7.4.0') %#ok<EXIST>
            % This is a pre-R2007a Matlab: No longer supported by V 3.0.10+
            fprintf('Matlab release prior to R2007a detected. This version is no longer\n');
            fprintf('supported by Psychtoolbox 3.0.10 and later. Aborted.');
            fprintf('\n\nInstallation aborted. Fix the reported problem and retry.\n\n');
            return;
        else
            % This is a R2007a or post R2007a Matlab:
            % Add PsychBasic/MatlabWindowsFilesR2007a/ subfolder to Matlab
            % path:
            rdir = [PsychtoolboxRoot 'PsychBasic\MatlabWindowsFilesR2007a\'];
            fprintf('Matlab release 2007a or later detected. Will prepend the following\n');
            fprintf('folder to your Matlab path: %s ...\n', rdir);
            addpath(rdir);
        end

        rc = savepath;
    catch
        rc = 2;
    end

    if rc > 0
        fprintf('=====================================================================\n');
        fprintf('ERROR: Failed to prepend folder %s to Matlab path!\n', rdir);
        fprintf('ERROR: This will likely cause complete failure of PTB to work.\n');
        fprintf('ERROR: Please fix the problem (maybe insufficient permissions?)\n');
        fprintf('ERROR: If everything else fails, add this folder manually to the\n');
        fprintf('ERROR: top of your Matlab path.\n');
        fprintf('ERROR: Trying to continue but will likely fail soon.\n');
        fprintf('=====================================================================\n\n');
    end
    
    try
        % Rehash the Matlab toolbox cache:
        path(path);
        rehash('pathreset');
        rehash('toolboxreset');
        clear WaitSecs;
    catch
        fprintf('WARNING: Rehashing the Matlab toolbox cache failed. I may fail and recommend\n');
        fprintf('WARNING: quitting and restarting Matlab, then retry.\n');
    end
    
    try
        % Try if WaitSecs MEX file works...
        WaitSecs('YieldSecs', 0.1)
    catch
        % Failed! Either screwed setup of path or missing VC++ 2010 runtime libraries.
        fprintf('ERROR: Most likely cause: The Microsoft Visual C++ 2010 runtime libraries\n');
        fprintf('ERROR: are missing on your system.\n\n');
        if IsWin(1)
            % Need 64-Bit runtime:
            fprintf('ERROR: Execute the installer file vcredist_x64.exe, which is located in your Psychtoolbox/PsychContributed/ folder.\n');
        else
            % Need 32-Bit runtime:
            fprintf('ERROR: Execute the installer file vcredist_x86.exe, which is located in your Psychtoolbox/PsychContributed/ folder.\n');
        end
        fprintf('ERROR: You must execute that installer as an administrator user. Exit Matlab before the installation, then restart it.\n');
        fprintf('ERROR: After fixing the problem, restart this installation/update routine.\n\n');
        fprintf('ERROR: You can also just do a: cd(PsychtoolboxRoot); SetupPsychtoolbox; PsychtoolboxRegistration(%i, ''%s'');\n\n', isUpdate, flavor);
        fprintf('ERROR: This will avoid a full download of Psychtoolbox over the internet and just finish the setup.\n');
        
        fprintf('\n\nInstallation aborted. Fix the reported problem and retry.\n\n');
        return;
    end
end

% If we're using Matlab then add the PsychJava stuff to the static
% Java classpath.
if ~IsOctave
    % Try to setup Matlab static Java class path:
    PsychJavaTrouble(1);
end

% Check if Screen is functional:
try
    % Linux specific instructions:
    if IsLinux
        fprintf('\n\n');
        fprintf('The Psychtoolbox on GNU/Linux needs the following 3rd party libraries\n');
        fprintf('in order to function correctly. If you get "Invalid MEX file errors",\n');
        fprintf('or similar fatal error messages, check if these are installed on your\n');
        fprintf('system and if they are missing, install them via your system specific\n');
        fprintf('software management tools:\n');
        fprintf('\n');
        fprintf('For Screen() and OpenGL support:\n\n');
        fprintf('* The OpenGL utility toolkit GLUT: glut, glut-3 or freeglut are typical provider packages in most Linux distributions.\n');
        fprintf('* GStreamer multimedia framework: At least version 0.10.24 of the core runtime and the gstreamer-base plugins.\n');
        fprintf('  For optimal performance use the latest available versions.\n');
        fprintf('  A simple way to get GStreamer at least on Ubuntu Linux is to install the "rhythmbox" or\n');
        fprintf('  "totem" multimedia-players. You may need to install additional packages to play back all\n');
        fprintf('  common audio- and video file formats. See "help GStreamer".\n');
        fprintf('* libusb-1.0 USB low-level access library.\n');
        fprintf('* libdc1394 Firewire video capture library.\n');
        fprintf('* libraw1394 Firewire low-level access library.\n');
        fprintf('\n\n');
        fprintf('For PsychKinect() (See "help InstallKinect"):\n\n');
        fprintf('* libusb-1.0 USB low-level access library.\n');
        fprintf('* libfreenect: Kinect driver library.\n');
        fprintf('\n');
        fprintf('For PsychHID() support:\n\n');
        fprintf('* libusb-1.0 USB low-level access library.\n');
        fprintf('\n\n');
        fprintf('For Eyelink():\n\n');
        fprintf('* The Eyelink core libraries from the SR-Research download website.\n');
        fprintf('\n');
        fprintf('\n');
        fprintf('If you receive an installation failure soon, then please read the output of\n');
        fprintf('"help GStreamer" first and follow the installation instructions for GStreamer\n');
        fprintf('on Linux. Psychtoolbox''s Screen() command will not work without GStreamer!\n\n');

        % Additional setup instructions for embedded/mobile devices with ARM cpu required?
        if IsARM
            fprintf('Additionally, as this is a device with ARM processor, the helper library\n');
            fprintf('libwaffle-1.so needs to be installed in a system library folder for Screen\n');
            fprintf('to work. You can find a copy of the library in the PsychContributed/ArmArch/\n');
            fprintf('subfolder of your Psychtoolbox main folder. Rename it to libwaffle-1.so.0 during\n');
            fprintf('the copy.\n');
            fprintf('Another requirement, at least as of April 2013 and Ubuntu 13.04 for the Nexus-7,\n');
            fprintf('is that you must start octave from the command line, or via some script, like this:\n');
            fprintf('LD_PRELOAD=/usr/lib/libGLESv1_CM.so octave\n');
            fprintf('This is a workaround for a small bug in octave for Nexus-7, which would cause Screen()\n');
            fprintf('to crash shortly after opening an onscreen window.\n\n');
            fprintf('\n');
            fprintf('If you run PTB on the Nexus7 make sure you do not use the "Unity" desktop since\n');
            fprintf('this might lead to unforeseen problems. Use a desktop without 3D desktop compositor instead.\n');
            fprintf('E.g. install and use XFCE (sudo apt-get install xfce4).\n');            
        end
    end

    % Check Screen:
    AssertOpenGL;

    if IsLinux
        % Setup Desktop compositor ("Compiz") to un-redirect fullscreen windows.
        % This allows to bypass desktop composition for PTB fullscreen onscreen windows,
        % so we get the deterministic timing and high performance we want for visual
        % stimulus presentation. The command is a no-op
        PsychGPUControl('FullScreenWindowDisablesCompositor', 1);
    end

    % Try to execute online registration routine: This should be fail-safe in case
    % of no network connection.
    fprintf('\n\n');
    PsychtoolboxRegistration(isUpdate, flavor);
    fprintf('\n\n\n');

    % Tell user we're successfully done:
    fprintf('\nDone with post-installation. Psychtoolbox is ready for use.\n\n\n');
    
catch
    fprintf('\n\n');
    fprintf('Screen() or online registration failed to work for some reason:\n\n');
    fprintf('Check the troubleshooting instructions on our Wiki (Download section \n');
    fprintf('and FAQ section, maybe also the Bugs section).\n\n');
    fprintf('Once you manage to fix the problem (simply type ''AssertOpenGL'' to verify\n');
    fprintf('that stuff works now), you do not need to run the installation routine again,\n');
    fprintf('but can start working immediately.\n\n');
    fprintf('However, we kindly ask you to execute the following command after everything works,\n');
    fprintf('so your copy gets registered by us for statistical purpose:\n\n');
    fprintf('PsychtoolboxRegistration(%i, ''%s'');\n\n', isUpdate, flavor);
    fprintf('Thanks! Press RETURN or ENTER to confirm you read and understood the above message.\n');
    pause;
    fprintf('\n\n');
end

% Run Linux post-configuration script try-catch protected:
if IsLinux
    try
        % This script modifies/extends system configuration files
        % to optimize the system for use with Psychtoolbox:
        PsychLinuxConfiguration;
    catch
    end
end

% Some goodbye, copyright and getting started blurb...
fprintf('GENERAL LICENSING CONDITIONS AND TERMS OF USE:\n');
fprintf('----------------------------------------------\n\n');
fprintf('Almost all of the material contained in the Psychtoolbox-3 distribution\n');
fprintf('is free-software and/or open-source software under a OSI (http://www.opensource.org/)\n');
fprintf('approved license. Most material is covered by the MIT license or a MIT compatible license.\n\n');

fprintf('A few internal libraries and components are covered by other free software\n');
fprintf('licenses which we understand to be compatible with the MIT license, e.g., the GNU LGPL\n');
fprintf('license, or BSD and Apache-2.0 licenses, or they are in the public domain.\n\n');
fprintf('3rd-party components which are freely useable and redistributable for non-commercial\n');
fprintf('research use, due to the authors permissions, but are not neccessarily free / open-source\n')
fprintf('software, can be found in the "PsychContributed" subfolder of the Psychtoolbox distribution,\n');
fprintf('accompanied by their respective licenses.\n\n');

fprintf('A few components are licensed under the GNU GPL v2 license with a special linking\n');
fprintf('exception for use with Mathworks proprietary Matlab application. A very few components,\n');
fprintf('e.g., the PsychCV() function are currently covered by the standard GPL v2 license and\n');
fprintf('cannot be used with Matlab. These are only available for use with GNU/Octave.\n\n');

fprintf('Please read the license text and copyright info in the Psychtoolbox file\n');
fprintf('License.txt carefully before you use or redistribute Psychtoolbox-3.\n');
fprintf('Use of Psychtoolbox-3 components implies that you have read, understood and accepted\n');
fprintf('the licensing conditions.\n\n');
fprintf('However, in a nutshell, if you just use Psychtoolbox for your research, our licenses\n');
fprintf('don''t restrict you in any practically relevant way. Commercial users, developers or\n');
fprintf('redistributors should make sure they understood the licenses for the components they use.\n');
fprintf('If in doubt, contact one of the Psychtoolbox developers, or the original authors of the\n');
fprintf('components you want to use, modify, merge or redistribute with other software.\n\n');
fprintf('Your standard Psychtoolbox distribution comes without the source code for\n');
fprintf('the binary plugins (the MEX files). If you want to access the corresponding\n');
fprintf('source code, please type "help UseTheSource" for specific download instructions.\n\n');
fprintf('BEGINNERS READ THIS:\n');
fprintf('--------------------\n\n');
fprintf('If you are new to the Psychtoolbox, you might try this: \nhelp Psychtoolbox\n\n');
fprintf('Psychtoolbox website:\n');
fprintf('web http://www.psychtoolbox.org -browser\n');
fprintf('\n');
fprintf('Please make sure that you have a look at the PDF file Psychtoolbox3-Slides.pdf\n');
fprintf('in the Psychtoolbox/PsychDocumentation subfolder for an overview of differences\n');
fprintf('between Psychtoolbox-2 and Psychtoolbox-3 and proper use of basic features. That\n');
fprintf('folder contains various additional helpful information for use of Psychtoolbox.\n\n');
fprintf('\n');
fprintf('Please also familiarize yourself with the demos contained in the PsychDemos subfolder\n');
fprintf('and its subfolders. They show best practices for many common tasks and are generally\n');
fprintf('well documented.\n');

fprintf('\nEnjoy!\n\n');

% Clear out everything:
if IsWin
    clear all;
end

return;