On Tue, 7 Jul 1998, Patrick Olson wrote: > when I try tail -f /var/log/messages | grep "local IP" > > it prints (with a real IP address instead of 123.123.123.123) > > Jul 7 20:06:00 server2 pppd[587]: local IP address 123.123.123.123 > > on my console. That's exactly what it should do. But if I try to > redirect it to a user's file (so he can see what his dynamic IP is) using > > tail -f /var/log/messages | grep "local IP" > /home/pppusers/dynamic.IP > > it does nothing but create a 0 byte file. > > Questions: > > 1. What am I doing wrong?
The reason the redirection doesn't work as expected is that "tail -f" doesn't send EOF, so although /home/pppusers/dynamic.IP gets opened the buffer doesn't get flushed, so the file doesn't get written to. Cheers, Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <[EMAIL PROTECTED]> Date: 08-Jul-98 Time: 12:31:15 -------------------------------------------------------------------- -- Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] < /dev/null
