Tail -f piped with sed don't work --- precision

Precision on this question from some time ago

It really seems to be the sed that isn't happy with the tail output
piped
My two sed statemets are probably not optimized, beginner, but the
examples should illustrate

tail -50 /var/opt/OV/share/log/trapd.log | grep "Error."| sed
's/^.*STI_//p'| sed 's/_.*$//p'
Works

tail -f /var/opt/OV/share/log/trapd.log | grep "Error."| sed
's/^.*STI_//p'| sed 's/_.*$//p'
No output

tail -f /var/opt/OV/share/log/trapd.log | grep "Error."
Works as well

Br,

R MOLLER


_____________________________________________
From: Ragnar Moller (MA/EAF)
Sent: jeudi 25 janvier 2007 11:24
To: 'sunmanagers@xxxxxxxxxxxxxxx'
Subject: Tail -f piped with sed don't work

I wanted to the output of a log file and clean up a bit in order to
apply another script to the output.

I have a statement with tail -50 which works, but tail -f doesn't.

It also works if I drop the sed filtering at the end.

Have an idea

tail -50 /var/opt/OV/share/log/trapd.log | grep "Error."| sed
's/^.*STI_//p'| sed 's/_.*$//g'
Works

tail -50 /var/opt/OV/share/log/trapd.log | grep "Error."| sed
's/^.*STI_//p'| sed 's/_.*$//g'
No output

Reagrds,

Ragnar Moller
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