RE: null chars in text file: recover text?

  • From: "DaShiell, Jude T. CIV NAVAIR 1490, 1, 26" <jude.dashiell@xxxxxxxx>
  • To: <programmingblind@xxxxxxxxxxxxx>
  • Date: Thu, 15 Oct 2009 09:18:51 -0400

The nocz utility is one of the utilities that can be used to remove
extra control-z's from files.  Also anyone with a windows copy of
duxbury may find the wring utility very helpful in this respect.  If
neither of those is available, sed can be downloaded on windows and used
and it can also clean these from files and do lots more stuff too.  The
sed utility though can either be an enormous help or an enormous danger
depending on the knowledge level of the particular user.  The sed
utility is well worth the learning curve needed to become knowledgeable
too.  The sed utility uses streams into which files get pulled for
processing.
 


Rot47: <;F56]52D9:6==@?2GJ]>:=>
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of qubit
Sent: Thursday, October 15, 2009 8:57
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: null chars in text file: recover text?

Hi -- the control+z character is the command to close a file, but it
does 
not appear in the contents of the file.
--le

----- Original Message ----- 
From: "DaShiell, Jude T. CIV NAVAIR 1490, 1, 26"
<jude.dashiell@xxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Thursday, October 15, 2009 7:13 AM
Subject: RE: null chars in text file: recover text?


I don't have the Unicode table to hand so will only speculate about
what's going on with this file.  The eof in ascii is a control-z
character represented by (^z) probably when jaws finds it.  I think what
notepad is doing is space padding the file.



Rot47: <;F56]52D9:6==@?2GJ]>:=>
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex Hall
Sent: Thursday, October 15, 2009 7:39
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: null chars in text file: recover text?

Thanks. What is the ascii of EOF? Also, there is something odd about the

file: I wrote the script to get me the first 16 characters that are not
ASCII 0, which it does; it gets the characters I expect, the last of the

remaining text. However, when I open the file in Notepad and have jaws
tell
me the unicode of the characters, it keeps reporting 32 as the
characters
after the last of the text, not 0, even though my script skips these
characters, meaning they have to be 0 and not 32. Any thoughts on what
is
going on with this file?


Have a great day,
Alex
New email address: mehgcap@xxxxxxxxx
----- Original Message ----- 
From: "DaShiell, Jude T. CIV NAVAIR 1490, 1, 26"
<jude.dashiell@xxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Thursday, October 15, 2009 7:27 AM
Subject: RE: null chars in text file: recover text?


I would also remove that end of file marker then locate any remaining
end of file markers and see if one of them was in reasonable position
for the end of file by file size.  Then I'd strip any earlier end of
file characters out and see what got recovered after that.  With data
recovery the work is a continuous series of experiments.



Rot47: <;F56]52D9:6==@?2GJ]>:=>
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Homme, James
Sent: Thursday, October 15, 2009 7:20
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: null chars in text file: recover text?

Hi Alex,
It sounds like you can strip out the null characters and get the text
back.

Jim

-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex Hall
Sent: Wednesday, October 14, 2009 5:22 PM
To: Blind Programming List
Subject: null chars in text file: recover text?

Hi all,
Someone on another list sent me a text file, saying that much of the
text is
gone but the file size is still the same. This file has been
periodically
overwritten (a new copy written over the old one as the file was backed
up),
and one day the file's text ended at a random spot and all text after
that
spot was erased. I looked at the file in a perl script that gave me the
first character that was not ascii 0 (what I think is a null character)
and
the first characters that were not null were the end of the text in the
file, not surprisingly. This tells me that all text after some point
was,
for some reason, replaced by null characters. Is there any hope of
recovering the text now? I hope this made sense.


Have a great day,
Alex
New email address: mehgcap@xxxxxxxxx

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