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[peterchu]

I ask this question before , but I have one more requirement.

I want to replace all the word "SUCCESS" to "FAIL" in all files under the directory /home ( include all sub-directories ) , what can I do ? thx in advance.

[Dave Olker]

Hi Peter,

Here's a really quick/dirty way to do it. I'm sure there are many more elaborate ways, and several more checks you can add to make it work to your liking:

for FILE in $(find /home/.)
do
if [ ! -x $FILE ]
then
grep "SUCCESS" $FILE > /dev/null 2>&1

if [ $? -eq 0 ]
then
cat $FILE | sed "s/SUCCESS/FAIL/g" > $FILE.new
fi
fi
done


This script checks to see that the file is not an executable and it ensures that the string "SUCCESS" appears in the file before modifying it. The original file is left intact and a new file with a ".new" extension is created.

Good luck,

Dave

[R. Sri Ram Kishore_1 · Accepted solution]

Hi,

Take a look at this link:
http://www.dslreports.com/forum/remark,10607506~mode=flat

HTH.
Regards,
Sri Ram

[peterchu]

thx replies,

I try the methods is ok, but it will copy a backup to $FILE.bak , how can I directly update the files instead of make a backup file ? thx.

[Dave Olker]

Hi Peter,

If you wanted to use the logic I posted previously, just change the line:

cat $FILE | sed "s/SUCCESS/FAIL/g" > $FILE.new

to

cat $FILE | sed "s/SUCCESS/FAIL/g" > $FILE


That will replace the existing file with the modified content.

Regards,

Dave

[Ermin Borovac]

Here's one-liner with perl

find /home -type f -exec perl -pi -e 's,SUCCESS,FAIL,g' {} \;

Be careful with

cat $FILE | sed "s/SUCCESS/FAIL/g" > $FILE

I think shell will process redirections before executing any commands. Which means that $FILE will get clobbered before cat gets to it.

[Muthukumar_5]

We can do it with sed / perl here.

Perl is easy to do as,

perl -p -i -e 's/SUCCESS/FAIL/g' filename.

You can collect all files using find command as,

find -name "filenamepattern" -exec perl -p -i -e 's/SUCCESS/FAIL/g' {} \;


You can do it with sed as

echo "sed -e 's/SUCCESS/FAIL/g' filename" > filename

It will do the changes for one file with using temp. files.

You can do on multiple files as,


grep -l "SUCCESS" | awk '{ print "echo \"`sed -e 's/SUCCESS/FAIL/g' "$0 "`\" > "$1 }' | sh

It will change all patterns of SUCCESS on all files. If you want to know what is happeneing just remove | sh on execution it will print single file execution statements for all files.

Regards
Muthu