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How to replace multiple file content?


 
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# 1  
Old 09-13-2013
How to replace multiple file content?

Hi Gurus,

I need replace multiple files content.

the file name pattern likes
Code:
currentfile_code_*

the content pattern in the file like
Code:
text=value

I need replace the content as
Code:
text=abcde

Thanks in advance
# 2  
Old 09-13-2013
I'm always leery of altering your originals, so back them up first:
Code:
# Create backup in case the replacement goes wrong!  ESSENTIAL!
tar -cf backup.tar currentfile_code_*

for FILE in currentfile_code_*
do
        sed 's#text=.*#text=newvalue#' < "$FILE" > /tmp/$$
        cat /tmp/$$ > "$FILE"
done

rm -f /tmp/$$

This User Gave Thanks to Corona688 For This Post:
# 3  
Old 09-13-2013
Hello,

If your sed support -i option (like gnu sed) , you can do it:
Code:
sed -i'.bak' 's#text=.*#text=newvalue#' currentfile_code_*

Regards.
# 4  
Old 09-13-2013
Quote:
Originally Posted by Corona688
I'm always leery of altering your originals, so back them up first:
Code:
# Create backup in case the replacement goes wrong!  ESSENTIAL!
tar -cf backup.tar currentfile_code_*

for FILE in currentfile_code_*
do
        sed 's#text=.*#text=newvalue#' < "$FILE" > /tmp/$$
        cat /tmp/$$ > "$FILE"
done

rm -f /tmp/$$

This script works, would you please tell me what the $$ mean?
# 5  
Old 09-13-2013
It's the shell's process id:

Code:
$ echo $$

30084

$ ps aux | grep '[3]0084'

user    30084  0.0  0.0   3156  1672 pts/1    Ss   09:38   0:00 -bash

$

I am just using it as a convenient, unique temporary file name.
This User Gave Thanks to Corona688 For This Post:
# 6  
Old 09-13-2013
Quote:
Originally Posted by Corona688
It's the shell's process id:

Code:
$ echo $$

30084

$ ps aux | grep '[3]0084'

user    30084  0.0  0.0   3156  1672 pts/1    Ss   09:38   0:00 -bash

$

I am just using it as a convenient, unique temporary file name.
Thanks for you quick reply.
I have one more question.

I have two values need to be replace. like:
Code:
abcd = 123
cdef = 456

I want to replace with
Code:
abcd = xxx
cdef = yyy

in current script, it only change one, would you please take a look.

thanks.
# 7  
Old 09-13-2013
Code:
# Create backup in case the replacement goes wrong!  ESSENTIAL!
tar -cf backup.tar currentfile_code_*

for FILE in currentfile_code_*
do
        sed 's#text=.*#text=newvalue#;s#text2=.*#text2=newvalue2#' < "$FILE" > /tmp/$$
        cat /tmp/$$ > "$FILE"
done

rm -f /tmp/$$

This User Gave Thanks to Corona688 For This Post:

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