Monitor log file and execute command - Shell Programming and Scripting

danielsbrewer · #1 (**permalink**) 07-28-2008

I would like to monitor a log file using a shell script and as soon as a line with a certain string in it appears I would like to run a program. I have been playing around with doing this using tail -f, but cannot get it to work. I found something similar here:
Help on scripting using tail

The restriction on this is that the monitoring script needs to be in sh or ash as I am using busybox.

Any hints? Many thanks

chihung · #2 (**permalink**) 07-28-2008

You should be able to use AWK to invoke command

Code:

tail -f some-logfile | awk '/some-pattern/ {system("run-some-command")}'

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