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Hi,
On 15/07/18 17:35, Andrew McGlashan via luv-main wrote:
> Hi,
>
> On 15/07/18 16:33, Russell Coker via luv-main wrote:
>> What's a good real-time log watching program?
>
>> This is something I've wanted for a while but not had the
>> inclination to get it going. The thing that finally made me
>> want to do it is when my workstation gave the below log messages
>> and decided to stop supporting USB 3.0 ports. As the ports that
>> are most convenient for connecting my keyboard and mouse are USB
>> 3.0 that was inconvenient. Removing the xhci modules and loading
>> them again fixed the problem. So what I want in this instance is
>> a program that will detect one of the below messages and then run
>> a script that will run some rmmod and modprobe commands to fix
>> it. I want it to know which log entries it has dealt with to
>> avoid performing the operation twice (which would cause problems)
>> or maybe have a list of log messages in the problem solved
>> category.
>
>> Any suggestions?
>
>
>> [18408.111698] xhci_hcd 0000:06:00.0: xHCI host not responding
>> to stop endpoint command. [18408.111716] xhci_hcd 0000:06:00.0:
>> xHCI host controller not responding, assume dead [18408.111738]
>> xhci_hcd 0000:06:00.0: HC died; cleaning up [18408.111747]
>> xhci_hcd 0000:06:00.0: Timeout while waiting for configure
>> endpoint command
>
> Simple bash?
>
>
> $ l --full-time coker* -rw-r--r-- 1 andrewm andrewm 60 2018-07-15
> 17:23:06.450452422 +1000 coker-test.log -rw-r--r-- 1 andrewm
> andrewm 12 2018-07-15 17:23:06.450452422 +1000
> coker-test.action-time -rw-r--r-- 1 andrewm andrewm 0 2018-07-15
> 17:23:07.278459755 +1000 coker-test.lastdone
>
>
>
>
> In another terminal:
>
> $ (tail -n0 -f coker-test.log |egrep --line-buffered '(aaa|aab)')
> >> coker-test.action-time & (while :;do [[ coker-test.action-time
> -nt coker-test.lastdone ]] && { echo do stuff;touch
> coker-test.lastdone;break; };sleep 10;echo -n .;done)
>
> Then echo some strings to coker-test.log from first terminal.
>
> ( Check status in second terminal each time)
>
> $ echo zzz >> coker-test.log $ echo aab >> coker-test.log
>
> The echo of aab will cause the second terminal to show the
> following and quit the loop:
>
>
> ...do stuff
>
> The testing each 10 seconds (with sleep), so about 30 seconds in
> it sees the aab string.
>
> $ ls -lart --full-time coker* -rw-r--r-- 1 andrewm andrewm 68
> 2018-07-15 17:24:09.579011308 +1000 coker-test.log -rw-r--r-- 1
> andrewm andrewm 16 2018-07-15 17:24:09.579011308 +1000
> coker-test.action-time -rw-r--r-- 1 andrewm andrewm 0 2018-07-15
> 17:24:13.259043876 +1000 coker-test.lastdone
>
>
> When you are happy that is all working fine, wrap the above to keep
> it active:
>
> while :;do (tail -n0 -f coker-test.log |egrep --line-buffered
> '(aaa|aab)') >> coker-test.action-time & (while :;do [[
> coker-test.action-time -nt coker-test.lastdone ]] && { echo do
> stuff;touch coker-test.lastdone;break; };sleep 10;echo -n
> .;done);done
The multitail option runs the "command" for every single match, the
original bash method seems best so far.
Cheers
A.
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