Running a function on a remote server via SSH in a script

Question

I Have shell script with few functions. I need to run this on 2 different machines for n number of times. Can I call the function as mentioned below and execute it? Or is there any other way to do it?

#!/usr/bash

execCommand () {
  #few statements here
}

getStatus() {
  #few statements here
}

main () {
  execCommand
  getStatus
}

$machine1="machine1"
$machine2="machine2"
$user="username"
$n=2

while [$n -le 2]
 do
   ssh $user@$machine1 'main'
   sleep 100
    ssh $user@$machine2 'main'
    n=$n+1
 done

The remote machine will not know the function main. You have to send everything through the ssh connection. You can also copy the files to the remote machine and then ssh to execute it. — fedorqui
– fedorqui, Commented Jun 3, 2013 at 15:21
possible duplicate of Shell script: Run function from script over ssh — Thomas8
– Thomas8, Commented Feb 25, 2015 at 7:05

Marcelo Cerri · Accepted Answer · 2015-11-23 16:08:10Z

3

There's no straightforward way to do that. But you can extract all the function definitions and inject them as a command at the beginning of your remote command:

ssh "$user@$machine1" "$(declare -f); main"

Notice that you still might have problems with global variables and other resources.

answered Nov 23, 2015 at 16:08

Marcelo Cerri

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1 Comment

wytten Over a year ago

You can also pass a single function definition with $(declare -f funcname)

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