Shell Programming and Scripting

What I was trying to say is that I need to exclude those img src occurences which already have an alt="(some text) as they are are not all empty.

eg

<img src=BLANK IMG> = do add an alt="" (this one works)

<img src=BLANK IMG border=0 alt=""> -- remove current one and add alt="" next to blank img (This one works)

<img src=BLANK IMG border=0 alt="image blank"> -- exclude from replace

And to answer your question, the text can appear on any line any number of times, with other text/tags surrounding it.

Hopefully that's a bit clearer

Thanks!

This pushes the problem outside of what sed can do since we can have a line like:
<img src=this height=10> <img src=that height=10 alt="">
The need to do different operations on two similiar strings on the same line is just too much. Sorry for the bad news.

Good news: combine Perderabo's solution with...

sed 's/\( alt=""\)\([^>]*\)\( alt="[^"]*"\)\([^>]*>\)/\3\2\4/g'

Tested...

$ cat file1
<img src=BLANK border=0>
<img src=BLANK border=0 alt="">
<img src=BLANK border=0 alt="image blank">
$ sed 's/ alt=""//g;s/\(<img src=[^ >]* \)/\1alt="" /g;s/\( alt=""\)\([^>]*\)\( alt="[^"]*"\)\([^>]*>\)/\3\2\4/g' file1
<img src=BLANK alt="" border=0>
<img src=BLANK alt="" border=0>
<img src=BLANK alt="image blank" border=0>

I wanted a perl script to be done for Password search & replace in two files.

For Example:

Example 1)--i am having a file such as
cat /opt/customer/Ariba/UAT/ariba/app/buyer/Server/config/Parameters.table

Example 2)--and i am having a other file in other location such as cat /opt/customer/home/username/CMStaging/UAT-20080304/AR/ServerFiles/opt/customer/Ariba/UAT/ariba/app/buyer/Server/config/Parameters.table

the example 1 file contains the string as **REPLACE**
the example 2 file contains the live password to be replaced.

i want is it should take the live password from the example 2 file & replace that (**REPLACE**)string with the example 1 file.

can anyone help me out for some code in detailed for the same on a urgent basis..

Thanks
Samir