尾巴-f | 格列普 <regex> | php脚本.php <grep result>

Question

Ok, so I have a ssh connection open to a remote server. I'm running a tail on the logs and if an ID shows up in the logs I need to do an insert into the database.

So I have my ssh tail working and I have it piping into my grep function which is giving me the IDs I need. The next step is that as those IDs are found it needs to immediately kick off a php script.

What I thought it would look like is:

ssh -t <user>@<host> "tail -f /APP/logs/foo.log" | grep -oh "'[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]'" | php myscript.php <grep result>

And yes my regex is horrible, wanted to use [0-9]{8}, but what I have gets the job done.

Any suggestions? Tried looking at -exec, awk, or any other tool. I could write the result to its own file and then read the new file, but that doesn't catch the streaming ids.

-=-=-=-=-EDIT-=-=-=-=-=-

So here is what I'm using:

ssh -t <user>@<host> "tail -f /APP/logs/foo.log" |grep "^javax.ejb.ObjectNotFoundException" |awk '/[0-9]/ { system("php myscript.php "$6) }'

And if I use tail -l #lines it works, or if after a while I ctrl-c, it then works. The behavior I wanted though was to as the tail got a bad ID to kick off the script to fix the bad ID. Not wait until an EOF or some tail buffer...

Answer 1

I'm having similar problem. There's something funny with tail -f and grep -o combination when ssh.

So on local server, if you do

tail -f myfile.log |grep -o keyword

It grep just fine.

But if you do it from remote server....

ssh user@server 'tail -f myfile.log |grep -o keyword'

doesn't work

But if you remove -f from tail or -o from grep, work just fine... weird :-/