How to input arguments via command line to conf?

Elastic Stack Logstash
1

example

i have one conf file

input{
'stdin'=>$sss
}

i want to input $sss via command line

example

logstash -f a.conf "value replace to $sss"

can possible in logstash conf ?

2

If you are a Bourne shell user then you could do this using environment variables. I would expect that to work for bash or Korn shell users as well, but not csh.