[SOLVED] how display part of an output stream

joveniel · 02-04-2011, 02:14 AM

Hello Guys.

I am a newbee in linux. Though I have little experience in the past, i just can't get to work what i have in mind.

i want to display part of an output stream.

cat sample.xml
<packet or="recv" ljid="d.sample@test.local/" ts="20110204T15:02:55"><message from='j.sample2@test.local/' to='d.sample@test.local' type='chat' xml:lang='en' id='sd61'><body>testing string</body><html><body style='font-style: normal; font-family: arial; color: #004200; font-size: 9pt; font-weight: normal'>testing string</body></html></message></packet>

i want to display only the following
to='d.sample@test.local'
from='j.sample2@test.local'
body=testing string

thanks,
jojo

KamasCZ · 02-04-2011, 03:06 AM

Hi,
try this:

Code:

cat aaa.txt | sed -e 's/.*from/from/g' | sed -e 's/type.*<body>/body=/g' | sed -e 's/<\/body>.*//g'

it's ment to parse file with multiple lines of same type.

joveniel · 02-04-2011, 03:55 AM

Hi KamasCZ.

Thanks for your reply. Thaw was amazing.

It actually did the job. Though it was "from" and "body" attributes only, i just modified a little bit for my desired output.

But I have another problem. This file I am viewing is a log file. So when i try to use tail -f command instead of cat, it doesn't work.

Best regads,
jojo

KamasCZ · 02-04-2011, 04:49 AM

Hi,
You must add -u flag (unbuffered) to each sed and it should work.

joveniel · 02-10-2011, 01:03 AM