2

So I found a way to transfer environment variables through ssh without having to change neither server nor client: Transferring environment variable through SSH / quoting in bash/sh/csh/tcsh

But I would also like to be able to transfer bash functions like this one:

$ myfunc() {
> echo Func $1
> }
$ export -f myfunc
$ parallel myfunc ::: a
Func a

Functions are not transferred through ssh:

$ parallel -S server myfunc ::: a
bash: myfunc: command not found
$ parallel --env myfunc -S server myfunc ::: a
bash: line 2: myfunc: command not found

But the content of the function is transferred nicely:

$ parallel --env myfunc -S server echo \$myfunc ::: a
() { echo Func $1} a

So it seems all I need to do now is to somehow tell bash that $myfunc is really the function myfunc.

How can I do that?

1

That actually proved to be fairly easy (except it does not work in csh). Simply do:

eval myfunc$myfunc

It unfortunately crashes normal variables, to avoid this only do the eval for variables for which the content start with '() {'; that seems to be bash's signature for functions.

  • Today use env_parallel from GNU Parallel. It works for more than functions. – Ole Tange May 4 '17 at 19:27

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