Solved

sed....replace  a string and write it to file

Posted on 2001-08-26
4
42,266 Views
Last Modified: 2013-12-26
Hi...
I have a whole bunch of xml files that i want to make a change in.....
I want to replace the FIRST occurance of the word Update with the word Insert. I have about 20,000 files, and I want to overtwrite the in files with the update.

 for i in `ls 1 2 3 4 5 6 7 8`; do sed -e s/Update/Insert/g $i > $i

seenms to wipe out the files.


thanks in advance

.....R
0
Comment
Question by:rickyr
4 Comments
 
LVL 4

Accepted Solution

by:
newmang earned 50 total points
ID: 6427239
You can do this by running a script along the following lines....

do
cat $i | sed 's/Update/Insert/' > $i.tmp
mv $1.tmp $i
done

BUT this will change EVERY occurrence of Update not just the first one.

Personally it seems to me that it would be easier to knock up a quick C program to do the job.

Cheers - Gavin
0
 
LVL 8

Expert Comment

by:shlomoy
ID: 6427615

update2insert.pl
================
#!/usr/bin/perl -w
use strict;
my $file_content = `cat $ARGV[0]`;
$file_content =~ s/Update/Insert/s;
print $file_content;



your commandline (tcsh):
========================
foreach file (`find 1 2 3 4 5 6 7 8 -type f`)
     perl update2insert.pl $file > tmp.$file
     mv tmp.$file $file
end

     
0
 
LVL 51

Expert Comment

by:ahoffmann
ID: 6428037
do you mean "First occourance" per line, or per file?
Do you insist on sed (awk, perl might be better)?
0
 
LVL 3

Author Comment

by:rickyr
ID: 6429520
This is close enough, I actually did...
(ksh)
for i in `ls`
do
sed -e s/Update/Insert/g $i >> ../tempdir/$i
done

Thanks

....R
0

Featured Post

The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

Question has a verified solution.

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

Suggested Solutions

Introduction: Load and Save to file, Document-View interaction inside the SDI. Continuing from the second article about sudoku.   Open the project in visual studio. From the class view select CSudokuDoc and double click to open the header …
Introduction: Database storage, where is the exe actually on the disc? Playing a game selected randomly (how to generate random numbers).  Error trapping with try..catch to help the code run even if something goes wrong. Continuing from the seve…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

810 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