How to tail sed and awk in one line? Post: 302983683

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Top Forums Shell Programming and Scripting How to tail sed and awk in one line? Post 302983683 by RudiC on Friday 14th of October 2016 05:35:17 PM

10-14-2016

Registered User

Quote:

Originally Posted by baris35

.
.
.
Below code is not printing ip file

Code:

#!/bin/bash
while true
do	awk '/myword/ && !a[$1]++ {print $1}' /var/log/apache2/access.log
	while IFS= read -r ip
	do	printf '%s\n' "$ip" >> ip
		./ban.sh
	done
done

Of course not. At least, not immediately. ip is not written to by the awk command. The awk prints to screen, the while loop reads from stdin --> you're supposed to enter the IPs found manually (which I doubt is what you really want).

Quote:

Final working status:

Code:

#!/bin/bash
while true 
do awk '/myword/' /var/log/apache2/access.log | awk '{print $1}' | awk '!a[$0]++' > ip | while inotifywait -e close_write ip; do ./ban.sh; done
	PID=`ps -eaf | grep syncapp | grep -v grep | awk '{print $2}'`
if [[ "" !=  "$PID" ]]; then
  echo "killing $PID"
  kill -9 $PID
fi

done

As has been pointed out before, the three awks can be concentrated into one as done in the example before. Redirecting stdout into the file ip PLUS piping it into something (here: while loop) doesn't work - use either. (Ususally, redirection takes precedence)
A while loop checking a closed file is somewhat pointless - either it exists or it does not.
The ban.sh is unknown, and so is grep3.sh, so there is not a snowball's chance in hell for to judge

Quote:

Terminal Output:

Code:

root@root:~# ./grep3.sh
Setting up watches.
Watches established.
ip CLOSE_WRITE,CLOSE
Setting up watches.
Watches established.

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Wouldn't it make sense you depict the entire situation (file/directory structure, input samples, scripts used, final action/output desired) so you can get useful help?

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