Shell Programming and Scripting

Code:

tail -f /var/log/syslog | egrep -c FATAL

is there a way to do the above and actually have the number of lines matching the pattern increment as it is logged to the log file?

for instance, when you invoke a command like the one i just posted, you'll not get the total lines unless you do something like this, which isn't what i want:

Code:

Code:

egrep -c FATAL /var/log/syslog

I want to be able tail a live log and instead of seeing the lines, i want an incrementing number which will represent the number of entries found matching the pattern i specified.

Here is what I came up with:
In one terminal window run this:

Code:

tail -f /var/log/syslog > /tmp/syslog.tmp

In another run this:

Code:

while true; do clear; grep -c FATAL /tmp/syslog.tmp; sleep 1; done

i was hoping to avoid having to write to disk. i think some implementation of awk can probably do this (at least that's what i'm wishing for).

Code:

tail -f /var/log/syslog |
awk '/FATAL/ {print ++c}'

Or overprint with

Code:

{printf "\r"++c}

this is more like it! thanks