Need help in replacing special characters

Shell Programming and Scripting
1

I am writing a ksh script. I need to replace a set of characters in an xml file.

FROM="��������������������������������������������������������";
TO="AAAAAAACEEEEIIIIDNOOOOOOUUUUYSaaaaaaceeeeiiiionooooo N R"

I have used the code- sed 's/$FROM/$TO/g'<abc.xml

But its not working.
Can anyone tell me the code to do this?

2

The sed you've posted will look for the exact string of characters in FROM and replace it with the entire string in TO. I think you want to do a one for one translation for each time characer X appears translate it to a matching character Y from the second set. If that is the case, try:

tr "[$FROM]" "[$TO]"  <input.xml >output-file

I don't use translate hardly at all, but this seemed to work in the quick test that I just ran.

3

Not sure if this is what you're looking for.

Using Perl:

cat file
FROM="��������������������������������������������������������";
TO="AAAAAAACEEEEIIIIDNOOOOOOUUUUYSaaaaaaceeeeiiiionooooo N R"

perl -ple 's/[^A-Za-z0-0\=\;\"]//g' file
FROM="";
TO="AAAAAAACEEEEIIIIDNOOOOOOUUUUYSaaaaaaceeeeiiiionoooooNR"

Hope this helps.

4

Yes,we need to search for the special characters & each time it occurs,it should replace it with the corresponding character in the file.