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Shell Programming and Scripting

Monitor log file and execute command

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# 1  
Old 07-28-2008
Monitor log file and execute command
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:
https://www.unix.com/shell-programmin...sing-tail.html

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
# 2  
Old 07-29-2008
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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