Files comparison

how can i compare files (same content's type) with iFS API ?

For your addon question - this is why it's important to have proper error handling and a proper shutdown routine in your application.
If you have any LabVIEW errors in your application you should handle these properly and if it's deemed to be an unrecoverable error then you tell your application to exit.
You should handle your application being closed correctly to make sure that whenever possible you shut down gracefully and close all of your references (e.g. hardware, file references etc.) before your application exits. There's some good information about that on a recent thread here: http://forums.ni.com/t5/LabVIEW/Best-Practices-for-Gracefull-Application-exit-close/m-p/3094973#M885...
Of course, there is always the possibility that you might get a fatal application crash or you might have a power cut or something - in that case you could periodically flush the TDMS buffer but there is also OS and disk-level caching to consider.
If you look at the Advanced TDMS VIs - you can disable buffering and according to the help "buffering does not occur at any layer".
Certified LabVIEW Architect, Certified TestStand Developer
NI Days (and A&DF): 2010, 2011, 2013, 2014
NI Week: 2012, 2014
Knowledgeable in all things Giant Tetris and WebSockets

Similar Messages

Do integrity checks by file comparison really work?

Hello,
I use a program (Beyond Compare) which has a Folder Compare module, with a function for doing a binary comparison between the files inside two folders. I use it to check the integrity of my backups, by comparing my main hard disk files, with the ones on
the backup hard disks. If two files get recognized as being different, then one of them should be corrupt (if they didn't get modified "normally").
My question is: will this method work to detect real file corruptions? Will it detect any kind of corruption, both copy corruptions, and "bit rot" corruptions? Will there be no problem regarding read cache? I mean: if the first file to compare gets read
from disk, and is kept in a read cache (by Windows or by the hard disk, or by something else), will the second file get read from the same cache (if Windows or the hard disk think they are identical files)? Do Windows and hard disks have some kind of procedure
to detect if a file to read from disk is already available in cache, even if it is in a different folder than the "original" one? Perhaps some kind of file-checksum-system which decides that the files are same? (And this system would not notice if the file
to compare is corrupt). If this would be true, then integrity checks by file comparison would not work, because in practice the same file would be read twice (first from disk, and then from cache), instead of reading both the two files to be compared from
disk.
I have already done tests by manually "corrupting" files (changing slightly the contents, while keeping size and timestamp the same), and it works (the files get recognized as different). But I'm not sure if it will work also with "real" corrupt files.
I'm interested mostly about Windows 8 Pro 64bit and NTFS (but would like to know also in general).
Thanks.

I also have Beyond Compare and have used it to check backup data.
Yes, Windows does RAM caching. If you have a comparison program read enough file data that you
can be sure the RAM cache is flushed, then you can be sure that reading the file data back and comparing it with the original data is a valid way to ensure you have uncorrupted backups.
Note that NTFS now does online recovery, so just the act of reading back the data can trigger processes inside the file system implementation that will recover the data if it should start to experience "bit rot" (weakening or failure of the
storage medium). But this is not strictly necessary as other operations, such as defragmentation etc., will occasionally access the disk data as well.
Some time back I wrote a small utility that calculates a CRC-32 on all the data from all the files in a set of folders. This is another way that re-reading all the data can be triggered, as well as producing a summary number that can be easily
compared to determine that all is well - though one doesn't need my software to do it... There are hash programs available that can accomplish the same things. Search for SHA-1 programs, but beware there can be malware associated with free programs
and download sites.
It's good that people think about data integrity. There's all too little of that nowadays.
-Noel
Detailed how-to in my eBooks:
Configure The Windows 7 "To Work" Options
Configure The Windows 8 "To Work" Options

File comparison tool for Windows 8.1?

I'm looking for a file comparison tool. I'm on Windows 8.1 Pro (Upgrade). There was a program called Windiff. Is it still available, and functional for Win 8.1? If so, where do I get it? If not, or if there's anything better, what should I use? Thanks
in advance for any help.

Hi,
It's ok to use fc command:
>fc /?
Compares two files or sets of files and displays the differences between
them
FC [/A] [/C] [/L] [/LBn] [/N] [/OFF[LINE]] [/T] [/U] [/W] [/nnnn]
   [drive1:][path1]filename1 [drive2:][path2]filename2
FC /B [drive1:][path1]filename1 [drive2:][path2]filename2
/A         Displays only first and last lines for each set of differences.
/B         Performs a binary comparison.
/C         Disregards the case of letters.
/L         Compares files as ASCII text.
/LBn       Sets the maximum consecutive mismatches to the specified
             number of lines.
/N         Displays the line numbers on an ASCII comparison.
/OFF[LINE] Do not skip files with offline attribute set.
/T         Does not expand tabs to spaces.
/U         Compare files as UNICODE text files.
/W         Compresses white space (tabs and spaces) for comparison.
/nnnn      Specifies the number of consecutive lines that must match
             after a mismatch.
[drive1:][path1]filename1
             Specifies the first file or set of files to compare.
[drive2:][path2]filename2
             Specifies the second file or set of files to compare.
Kate Li
TechNet Community Support

File comparison utility for OS X

In Dreamweaver CS6 on Mac OS X Lion, what file comparison utility should I use and what is the path to it (for the Preferences setting? I have TextWrangler installed via the App Store, but selecting that does nothing. There is supposed to be a twdiff command line program installed but it can't be found on my Mac.

delaneypub wrote:
In Dreamweaver CS6 on Mac OS X Lion, what file comparison utility should I use and what is the path to it (for the Preferences setting? I have TextWrangler installed via the App Store, but selecting that does nothing. There is supposed to be a twdiff command line program installed but it can't be found on my Mac.
What do you need it for? As I understand it, you no longer need it.
<http://www.reedolsen.com/mac-os-x-file-comparison-software-no-longer-needed/>
Please tell us what exactly you are trying to do so that a better approach can be given.
Good luck.

Script File comparison

Hi,
When I am using FileMerge and compare two different versions of a script file, it says "Files are not ASCII", if I 'proceed anyway' I am seeing lots of special characters.
How can I do a better file comparison(.scpt)?
regards
Mowri

Here's a very basic script that will accomplish what you're asking:
<pre style="width:630px;height:auto;overflow-x:auto;overflow-y:hidden;"
title="Copy this code and paste it into your Script Editor application.">set tmpDir to do shell script "mktemp -d /tmp/CompareScripts.XXXXXXXXX"
set leftFile to tmpDir & "/left"
set rightFile to tmpDir & "/right"
set script1 to quoted form of POSIX path of (choose file)
set script2 to quoted form of POSIX path of (choose file)
do shell script "osadecompile " & script1 & ">" & leftFile & ¬
";osadecompile " & script2 & ">" & rightFile & ¬
";/Developer/Applications/Utilities/FileMerge.app/Contents/MacOS/FileMerge -left " & ¬
leftFile & " -right " & rightFile & ";rm -rd " & tmpDir</pre>
This script is very basic and has no error checking incorporated. Here's what the script does when run:
1) Creates a uniquely named directory in the "/tmp" directory.
2) Asks you to locate script file #1 (left file for FileMerge comparison).
3) Asks you to locate script file #2 (right file for FileMerge comparison).
4) Launches FileMerge and loads the 2 files for comparison.
5) Deletes the directory it created in the beginning when you quit FileMerge.
The script will continue to run until you quit FileMerge. The script can be modified in many different ways depending on the exact task you'd like for it to achieve. You can also modify the script to be a droplet so you can just drop 2 scripts on it for comparison.
Hope this at least gets you started in the right direction.

Good file comparison app for mac

I've been using Dreamweaver for years but have never set up an app for file comparison. I don't even know where to start or what to look for. Any suggestions?

I chose DifMerge. It is great and very fast. Registration is now half price. Tried FileMerge, also nice but xcode has a lot more overhead on my MacBook Pro R. There are versions for Windows and Linux

File comparison for RoboHelp?

Is there a way to do a file comparison for RoboHelp projects?
I've read in the online help that you can do a file comparison if
you're using version control software, which we're not. Our
reviewers would like a way to see what has changed between
versions.
Thanks.

I have always been impatient with editors and reviewers who
insist on changes being flagged. In my view, this is the lazy
person's way of doing a half-hearted job. They don't want to look
at anything but the changes. I wouldn't handle my contributors that
way; why let reviewers off the hook?
The underlying assumption is the material was at least
correct, if not perfect, before changes and doesn't warrant a
second look. A foolish assumption. Additionally, this approach will
fail to spot contradictions and inconsistencies between new
material and earlier text that wasn't revised.
Yet I can and will suggest a tool, one I would never use for
editorial review, that pinpoints with dead-on accuracy any
differences between files.
It's useful for controlling the publishing process and for
checking back on what RH has published between versions.
An inexpensive application available on the Web is Beyond
Compare. It will let you set up side-by side (or above-and-below)
comparisons with options for various degrees of control, such as
file revision level, date/time stamps, file size and so on. You can
flag files that differ by checksum or as little as a binary value.
You can open a mismatched pair and review differences line by line.
You can even suppress the display of files and lines with no
changes.
That's my rant for today. Good luck.
Harvey

File comparison program

Can anyone recommend a good file comparison program?
Thanks
Vic

Thanks! I'm now playing with Beyond Compare
A.Translator wrote:
> Joe Makowiec schreef op 14/11/2008 :
>>> Can anyone recommend a good file comparison
program?
>
>> Windows has its own built-in 'fc' utility. If you
don't like that, get a
>> copy of the GNU utilities ports for Windows[1] and
use 'diff'
>
>>
http://gnuwin32.sourceforge.net/
>>
http://unxutils.sourceforge.net/
>
> Or WinMerge (free) from
http://winmerge.org/
> or Beyond Compare from
http://www.scootersoftware.com/
>

Indesign File comparison tool

Hello, is there any tool available for indesign files that makes a precise comparison between two indesign documents? I need this for making sure of corrections made in documents i have. Idealy it would work as a search function and enable the comparison of two different documents and highight any changes made between the two. Thanks very much--c

Doesn't this approach only focus on errors?
I am not familiar with Preflight, but when I run it I only get errors.
I struggle with the same comparison issue. I need highly detailed comparisons.
When I try this in Acrobat Pro comparing the PDF outputs of two different InDesign files, it pretty much marks the entire document as changed.
I end up using a 3rd party tool (Araxis Merge) and doing a binary file comparison, then trying to figure out where in the INDD file the changes are.
Cheers.

File comparison and merge tool

could you please tell me a nice (free if possible!) file comparison tool for the mac.
I currently use Beyond Compare (http://www.scootersoftware.com/) or WinMerge (http://winmerge.org/) on XP
thanks in advance
Mac OS X (10.4.8)

You could get out your original DVD that came with your computer and install the developer tools that Apple provides.
Once installed, you can open /Developer/Applications/Utilities/FileCompare.app
This is free and useful.
If you cant find your original DVD you can get if from developer.apple.com

PDF file comparison setting

Hello I am using Acrobat PRO XI on 30days demonstration program.
Now I want to compare PDF files without text ornament (Fonts style, Bold, italic and etc ...) .
Microsoft word 2010 can control a comparison without text ornament, but document style is broken layout if there is tables and pictures including text.
If there are some good solution, I will buy Acrobat soon. if no, it may be postponed ...
My environment
Windows7
Acrobat PRO XI
Thanks in advance for your cooperation.

Do this in the Initial View tab of the PDF's Document properties.
Be well...

Security file comparison

Dear All,
Our security file crashed and we used the backup copy to recover it. The date of the backup copy shows it is the one on the prior day. Which I don't think there will be much defference, and we reviewed the log and can find no security changed during the day.
But our management team asks us to compare the two files and report the difference...
Do you have any good idea to compare the 2 files?

Well, your comparison is always going to be off, isn't it? One file is good, the other corrupt -- they have to be different, don't they?
I would be extra sure to have a backup of the .bak file before I did any of this as Essbase has a tendency to write a copy of Essbase.bak on start up and it would be a shame to overwrite your last good copy.
If the original file will still let you start Essbase up (usually this isn't the case, but you might get lucky), you can dump the contents of the Essbase.sec in three ways:
1) Start Essbase in a window, and issue the DUMP command -- that will write the information out to a text file.
2) I think you can do this from EAS, but for the life of me can't remember how -- right click on the security node and select export? I don't have EAS in front of me.
3) Use MaxL's export security_file command.
One other thing to consider -- if you use externalized to Shared Services security, most of your security is there, not in Essbase.sec, so you might want to think about comparing what was in Shared Services versus what is there today.
Regards,
Cameron Lackpour

File Comparison using Shell Programming

Hi All,
I want to compare two text files using shell programming. The two text files are actually Business Objects output extracted in a text format. The two output files are not in a tabular format and are no way similar in looking. I want to take one file e.g. file1 as an input file and compare each line of file1 with the other file e.g. file2. During comparison I want to extract the differences found in another file and if possible the similar data as well.
Below is how the files will look like
File 1:
BILL1000000 1111251 122222
RMG1A2 023425100000000010001 11135 102650111100
UHL1 6999999 454540001 Weekly 000
0544424556895PS DATA 01MPS100000/03 MR A A PERTH UTL1234567893106923455053106900000010000005
File 2:
AUTO
APPLICATION=STARTPOINT
START
PROCESSING DATE=01012011
1598301270320099TEST C E 00000031615 123456
7854301276140499TES P 00000062943 234567
UHL1 6999999 454540001 Weekly 000
5569931233333499/123456789 00000013396 345678
4471931233333499ER K J 00000031835123456789012456789
33652931233333499E J L 00000034729123456789012567890
45783123333349921/123456789 00000039080 678901
1452931233333499T R 00000040678123456789012789012
59689312333334994/987654321 00000048614 890123
4112931233333499/987654321 00000060631 901234
1236931217836899 K S 00000043704 012345
END
As you can see above the file are not at all matching except for one record UHL1, but its just an example. As an output I would like to have a third file containing all these records, highlighting the differences, and a fourth file where in only the matched records should get populated.
Please post any useful scripts related to the above scenario.
Many Thanks.

Nik,
Thanks for that script. Its solving my purpose upto an extent.
Going another level to that example, in cases where in the first column of file 1 is to be compared with second or third column in file 2, what all the changes should be made to your script. For example,
File 1:
1       a       APPLICATION=WWAGES      8       9
2       b       1200301270320099TEST C E         00000031615            123456
3       c       1200301276140499TES P            00000062943            234567
4       d       APPLICATION=WWAGES      6       7
5       e       1200301270320099TEST C E         00000031615            123456
6       f       1200301276140499TES P            00000062943            234567
7       g       APPLICATION=WWAGES      4       5
8       h       1200301270320099TEST C E         00000031615            123456
9       i       1200301276140499TES P            00000062943            234567
10      j       APPLICATION=WWAGES      2       3
11      k       1200301270320099TEST C E         00000031615            123456
12      l       1200301276140499TES P            00000062943            234567
File 2:
a       1       APPLICATION=WWAGES      8       9
b       2       1200301270320099TEST C E         00000031615            123456
g       7       APPLICATION=WWAGES      4       5
h       8       11200301270320099TEST C E         00000031615            12223456
k       12      1200301276140499TES P            00000062943            234567Now, in the above example First and Second Columns of File 1 are to be compared against Second and First Columns of File 2 respectively. Please see that in file 2, 12 and K are not matching with file1's record 11 and K, so they should not be picked.
Based on the matched columns, will continue comparing rest of the fields for the records.
Please guide me the changes to be done in your script for catering to the above scenario.
Thanks.

TDMS & Config Files Comparison

Hello,
I'm not really new to the community since I had many queries that have already been asked before and I found an answer here, until now. I've been studying up on TDMS (File>Group>Channel) and its conceptual heirarchy seems to be very similar to Config Files (File>Section>Key). Now, I think it's possible to use the TDMS template for config files as well aside from measurement results but I thought I should ask...
What are the advantages and disadvantages of TDMS vs Config (*.ini) Files?
I haven't found any form of comparison between the two so far. I would personally excempt the Notepad accessibility of the Config File as an advantage since it would be better to limit the access to the system settings from non-authorized users.
Solved!
Go to Solution.

For your addon question - this is why it's important to have proper error handling and a proper shutdown routine in your application.
If you have any LabVIEW errors in your application you should handle these properly and if it's deemed to be an unrecoverable error then you tell your application to exit.
You should handle your application being closed correctly to make sure that whenever possible you shut down gracefully and close all of your references (e.g. hardware, file references etc.) before your application exits. There's some good information about that on a recent thread here: http://forums.ni.com/t5/LabVIEW/Best-Practices-for-Gracefull-Application-exit-close/m-p/3094973#M885...
Of course, there is always the possibility that you might get a fatal application crash or you might have a power cut or something - in that case you could periodically flush the TDMS buffer but there is also OS and disk-level caching to consider.
If you look at the Advanced TDMS VIs - you can disable buffering and according to the help "buffering does not occur at any layer".
Certified LabVIEW Architect, Certified TestStand Developer
NI Days (and A&DF): 2010, 2011, 2013, 2014
NI Week: 2012, 2014
Knowledgeable in all things Giant Tetris and WebSockets

EP Upgrade - SP14 - Best Practice for Modification File Comparison

SDN Experts -
We are upgrading our EP from SP14 - SP16. SAP offers a file "diff" tool that is only useful for Java application files to assist in re-applying our mods on top of the new code stack.
We are looking for best practices in Portal upgrades to do the following:
- Identify all files that we have modified on existing SP
- Diff all source code files (java, XML, GUI, other) between Current SP14 and SP16
We are also looking for documentation that identifies the local directory structure for NWDS. This would aid us in creating a batch process to "diff" our source code libraries.
Any recommendations are appreciated.
Thanks

I'm not realy getting your question because you already state what to do:
We are looking for best practices in Portal upgrades to do the following:
Identify all files that we have modified on existing SP
Diff all source code files (java, XML, GUI, other) between Current SP14 and SP16
You should know by documentation what is changed I guess? Then start diff-ing the code and recompile or repackage. NWDS also has diff functionalities.
Good luck,
Benjamin

How to do File Comparison in SAP PI

Hi All,
I have another requirement.
I have two text files, both containing a list of materials. I want to compare file A with file B and add the materials from file B that are not in file A.
For example
Input: File A
15-G
12-B
18-A
18-D
Input: File B
15-J
12-B
19-C
Output: Updated File A
15-G
12-B
18-A
18-D
15-J
19-C
As you can see the material 12-B already exists in file A so it isnu2019t copied across but 15-J and 19-C were copied across. Do you know how I could do this?
Any suggestion.
Thanks,

Hi,
The easiest approach is to do as I described above:
Read both files in sender file adapter, use ABAP mapping (should be much easier than graphical one, as some quite complicated logic is required to detect and delete duplicates) and write the results to target file with File Construction Mode = Create in receiver CC.
And use the Additional File(s) feature of the sender channel to get multiple files, as described here in Q4 and Q5:
http://wiki.sdn.sap.com/wiki/display/XI/SenderFileAdapterFrequentlyAsked+Questions
Hope this helps,
Greg

Files comparison

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