This looks like a bug on Net::SSH::Perl.

I can reproduce the problem myself. In my environment, Net::SSH::Perl hangs at some point between 8000 and 10000 characters.

Net::OpenSSH can handle the same commands without any issue (that's why I think the problem lies on Net::SSH::Perl): 

#!/usr/bin/perl
use strict;
use Net::OpenSSH;
use Net::SSH::Perl;

my $host = $ARGV[0] // "localhost";

for my $len (10, 100, 1000, 2000, 4000, 6000, 8000, 10000, 20000, 5000
+0) {

    my $cmd = "echo ";
    $cmd .= "." x $len;

    warn "trying with Net::OpenSSH, len=$len...\n";
    my $ssh1 = Net::OpenSSH->new($host);

    my ($stdout1, $stderr1) = $ssh1->capture($cmd) or die "Failed!\n";
    warn "Failed $?!\n" if $?;

    warn "trying with Net::SSH::Perl, len=$len...\n";
    my $ssh2 = Net::SSH::Perl->new( $host,
                                    # debug => 1,
                                    options => [ "BatchMode yes",
                                                 "PasswordAuthenticati
+on no",
                                                 "ConnectTimeout 15" ]
+ );
    $ssh2->login("root") or die "Failed to login: $!\n";
    warn "logged\n";
    my ($stdout2, $stderr2, $exit) = $ssh2->cmd($cmd);
    warn "Failed $exit!\n" if $exit;

}

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In reply to Re: Net::SSH::Perl doesn't like long commands by salva
in thread Net::SSH::Perl doesn't like long commands by pattyj

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