awk filtering, then execution

Shell Programming and Scripting
1

Hi,

I need to do the following but I don't know exactly what to do.

I need to monitor a file ... with tail -f for example, but I know that I could do it with awk, wait for a specific string ... , then perform an action, call a script, etc.

Let's say that my file name is test.txt , I need to wait for a string like "system call" ... if that happens, I will take that file to another place, or email, etc.

How can I do it from the CLI, without using additiona scripts, etc?

Thanks,

Marco

2

On the top of my head, no debugging done, using bash since I've no idea how to call different programs from awk:

tail -f test.txt | while read D ; do if [ "$D" = "mail this file to me" ] ; then mail -s "keyword mentioned in log" some.email@host.com < test.txt ; fi ; done

While on another terminal

echo "mail this file to me" > test.txt

will get the insides of file test.txt sent to some.email@host.com.

3

Some adjusts

tail -f test.txt | while read D ; do echo "$D" |grep "PUT YOUR STRING HERE" ; if [ $? == "0" ];   then mailx -s "keyword mentioned in log" some.email@host.com < test.txt ; fi ; done
4

Thanks for the reply ... it worked fine !