[sed] replace string?
 

Dear all,

I'm sorry that I can't understand when I man sed.
What I want to do are replacing some string and inserting strings in first line.

The strings I want to replace, ex:
first second; ==> //first second;
#include <FlexLexer.h> ==> #include "FlexLexer.h"

I may insert a string,such as #include "myheader.h", to first line of some file.

How should I do?
Thanks for your help.

Best Regards,
chuanyung.

Here are some examples:

One file
sed s/\<FlexLexer.h\>/\"FlexLexer.h\"/ yourfile.c >yourfile.new; mv yourfile.new yourfile.c

a few files
for i in 'file1 file2 file3'
do
sed s/\<FlexLexer.h\>/\"FlexLexer.h\"/ $i >$i.new
mv $i.new $i
done

A dir tree of files
for i in `find -name file\*`
do
sed s/\<FlexLexer.h\>/\"FlexLexer.h\"/ $i >$i.new
mv $i.new $i
done

-Matt

Not tested but should work ...

"info sed" is much explainig than "man sed".
If you're not familiar with "info" try readingi "info info"

Here's more sed explanation, examples, tricks....
http://www.faqs.org/faqs/editor-faq/sed/
http://main.rtfiber.com.tw/~changyj/sed/
http://sed.sourceforge.net/grabbag/

Thanks, I finished it.