Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Some thing to replace sed

Posted on 2001-07-16
7
Medium Priority
?
381 Views
Last Modified: 2013-12-27
I have a file that has ascii and binary data (its actually a postscript file). I need to translate some of the string values at the beginning of the job.

I thought it would be easy

sed -e 's/123456/789012/' < input > output

The translation works correctly but the file is a different size.
I believe this is because of the binary data and inclusion of nulls.

If i try to edit the file in vi, it says line too long.

The file will edit successfully with dtpad.

Is there a version of sed that will handle the binary data and nulls or is there some other utility


 
0
Comment
Question by:markhardisty
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 3

Expert Comment

by:interiot
ID: 6286043
vim (Vi Improved) has support for longer lines, as well as binary editing.  See http://www.vim.org/html/editing.html#edit-binary

0
 
LVL 14

Expert Comment

by:chris_calabrese
ID: 6287679
If the file contains binary data, then it's not PostScript.  Maybe it's PDF or Encapsulated PostScript.
0
 
LVL 4

Expert Comment

by:Otetelisanu
ID: 6288648
look for sed with od -cx file
and after
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
LVL 1

Accepted Solution

by:
shanechambers earned 400 total points
ID: 6289667
Perl might work better;
This will change 'file' inplace, while creating a 'file.orig' of the backup;

perl -p -i.orig -e's/123456/789012/' file
(drop the '.orig' after the -i if you don't want a backup)

An inline version of this would be;
cat file | perl -p -i -e's/123456/789012/'

Note this time I specified no backup copy was to be kept.

Just a suggestion.
0
 
LVL 4

Expert Comment

by:Otetelisanu
ID: 6289833
1. od -cx file >file1
2. sed -e 's/123456/789012/' < file > file2
3. od -cx file2 >file3
4. diff file1 file3
0
 
LVL 4

Expert Comment

by:Otetelisanu
ID: 6289835
1. od -cx file >file1
2. sed -e 's/123456/789012/' < file > file2
3. od -cx file2 >file3
4. diff file1 file3
0
 

Author Comment

by:markhardisty
ID: 6290407
Thanks every one:

Ok re the postscript comment it is an EPSF file, in fact a DCS master file with a binary preview

Vim seems a good option (took ages to download and then needed lots of extra librarys in place,) but it will edit the file, i havent had a chance to run it inline from a script though.

Im not sure i understand how the od example fixes the problem. Will try it a few more times to see if i can work it out

but the neatest and simplest is the perl solution so that gets the vote..

Thanks again.. This has dug me out of a mess
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A metadevice consists of one or more devices (slices). It can be expanded by adding slices. Then, it can be grown to fill a larger space while the file system is in use. However, not all UNIX file systems (UFS) can be expanded this way. The conca…
Java performance on Solaris - Managing CPUs There are various resource controls in operating system which directly/indirectly influence the performance of application. one of the most important resource controls is "CPU".   In a multithreaded‚Ķ
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
In a previous video, we went over how to export a DynamoDB table into Amazon S3.  In this video, we show how to load the export from S3 into a DynamoDB table.
Suggested Courses

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question