pb on multiple <pipe> with tail ?

[rmkml]

Hi,

I have DFB-1.0,

and my question is : multiple pipe with tail not work ?

(same pb with freebsd v4.x)

test 1 :

 xtermA :
 # tail -f /var/log/messages | grep test

 xtermB :
 # logger test

 ok I view syslog in xtermA :
 Jul 17 15:35:51 <1.5> dgfly1 root: test


test2 :

 xtermA :
 # tail -f /var/log/messages | grep test | grep root

 xtermB :
 # logger test

 I don't view syslog in xtermA ?


Regards

Rmkml at xxxxxxxxxx