bash - How to properly escape characters for backquotes for ssh in Perl? -

i have code:

$script = "console.log(\"it works!\");"; $output = qx/ssh user@123.123.123.123 $script | interpreter/; 

it's supposed run $script through interpreter , write $output. problem doesn't work. how escape characters correctly?

think you're trying ssh. both of these produce same output, work differently:

ssh user@host 'echo "puts 2+2" | ruby' echo "puts 2+2" | ssh user@host ruby 

in first, remote shell executing pipeline. (if don't have single quotes, happens?) in second, it's piped through local shell ssh command , interpreter launched.

rather perform convoluted escapes of code come out correctly when crammed through sh, prefer pipe text in through stdin. it's simpler.

using ipc::run heavy lifting:

#!/usr/bin/env perl  use strict; use warnings;  use ipc::run qw(run);  $in = <<ffff; 2 + 2 8 * (2 + 3) ffff  $cmd = [qw(ssh user@host perl calc.pl)];  run $cmd, \$in, \my $out, \my $err or die "ssh: $?";  print "out: $out"; print "err: $err"; 

(calc.pl simple infix calculator program had lying around)

here's output get, running that:

out: 4 40 err: (ssh banners , pointless error messages) 

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seeing system or qx// calls in perl script sign of trouble. in general, don't having think shell syntax or shell quoting when i'm not writing shell; has nothing problem i'm trying solve, nor tool i'm solving with. (and that's ignoring security implications.)

oh, , if don't have muck standard input still want execute , capture output other programs, there's ipc::system::simple.