# How to call a method of ksh file(shell script) from a conf file(logstash file) **URL:** \ **Category:** Logstash\ **Created:** [July 6, 2018, 12:26pm UTC](https://discuss.elastic.co/t/how-to-call-a-method-of-ksh-file-shell-script-from-a-conf-file-logstash-file/138910 "2018-07-06T12:26:29Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![prashansa1](https://avatars.discourse-cdn.com/v4/letter/p/a3d4f5/32.png) [@prashansa1](https://discuss.elastic.co/u/prashansa1)\ **Post date:** [July 6, 2018, 12:26pm UTC](https://discuss.elastic.co/t/how-to-call-a-method-of-ksh-file-shell-script-from-a-conf-file-logstash-file/138910/1 "2018-07-06T12:26:30Z")
How to call a method of external ksh file(shell script) from a conf file(logstash file). Shell script (ksh file) a.ksh Test() { x ="$1" if (x \> 10 ) return x; } Logstash Script (conf file) acon.conf I want to call Test method ( i.e. Test )of above a.ksh file from filter block(of ruby code) of acon.conf conf file ---
**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\ **Post date:** [July 6, 2018, 12:50pm UTC](https://discuss.elastic.co/t/how-to-call-a-method-of-ksh-file-shell-script-from-a-conf-file-logstash-file/138910/2 "2018-07-06T12:50:41Z")
This is a shell script question and not a Logstash question. You can't invoke shell script functions directly from the outside. You'd have to write a.ksh in such a way that running `./a.ksh` or `ksh a.ksh` (possibly with arguments) invokes the Test function. ---
**Author:** ![prashansa1](https://avatars.discourse-cdn.com/v4/letter/p/a3d4f5/32.png) [@prashansa1](https://discuss.elastic.co/u/prashansa1)\ **Post date:** [July 9, 2018, 10:12am UTC](https://discuss.elastic.co/t/how-to-call-a-method-of-ksh-file-shell-script-from-a-conf-file-logstash-file/138910/3 "2018-07-09T10:12:35Z")
I am using ruby code in logstash file. How to execute shell command from logstash file(conf file ) inside the filter block of ruby code. ---
**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\ **Post date:** [July 9, 2018, 11:25am UTC](https://discuss.elastic.co/t/how-to-call-a-method-of-ksh-file-shell-script-from-a-conf-file-logstash-file/138910/4 "2018-07-09T11:25:50Z")
Ruby code executing from a ruby filter is just ordinary Ruby code, it's just that it also has access to the Logstash event currently being processed. There must be a million examples out there of how to run a program from Ruby code. If you explain what your end goal is we might be able to suggest something that doesn't involve running a shell interpreter for each message (since doing so can improve the event processing rate quite dramatically). ---
**Author:** ![prashansa1](https://avatars.discourse-cdn.com/v4/letter/p/a3d4f5/32.png) [@prashansa1](https://discuss.elastic.co/u/prashansa1)\ **Post date:** [July 9, 2018, 11:29am UTC](https://discuss.elastic.co/t/how-to-call-a-method-of-ksh-file-shell-script-from-a-conf-file-logstash-file/138910/5 "2018-07-09T11:29:08Z")
\*\*\* List item\*\* How to call a method of external ksh file(shell script) from filter block(of ruby code) of conf file(logstash file). We need to pass an argument (i.e: count) from logstash file (This count variable will be used in Test( ) function ), to ksh file(shell script)'s function (i.e: Test () ). After it, Test( ) function will return a value that value will be used in logstash file(conf file). 1. Shell script (ksh file) Test() { x ="$1" y=100 if (x \> 10 ) return y; } 1. Logstash Script (conf file) Test 25 ---
**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\ **Post date:** [July 9, 2018, 11:33am UTC](https://discuss.elastic.co/t/how-to-call-a-method-of-ksh-file-shell-script-from-a-conf-file-logstash-file/138910/6 "2018-07-09T11:33:38Z")
That's not an end goal. You're repeating your description of the means to reach your goal. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [August 6, 2018, 11:33am UTC](https://discuss.elastic.co/t/how-to-call-a-method-of-ksh-file-shell-script-from-a-conf-file-logstash-file/138910/7 "2018-08-06T11:33:42Z")
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