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Re^2: Probelm getting a large compressed tar file over ssh.

by swares (Monk)
on Nov 30, 2005 at 09:09 UTC ( #512885=note: print w/replies, xml ) Need Help??


in reply to Re: Probelm getting a large compressed tar file over ssh.
in thread Probelm getting a large compressed tar file over ssh.

I used to do this as you sugested but that method requires a trusted host type relationship which I do not have in this environment. I have to conect via ssh to a number of different systems using username / password authentication.
  • Comment on Re^2: Probelm getting a large compressed tar file over ssh.

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Re^3: Probelm getting a large compressed tar file over ssh.
by Corion (Patriarch) on Nov 30, 2005 at 09:25 UTC

    You don't really need a trusted host relationship, you just need passwordless keys. If passwordless keys are impossible, then you will have to use the interactive method. Maybe you can go forward by hacking Net::Ssh::Perl to redirect the STDOUT part of the connection. Looking into the source of Net::SSH::Perl::SSH1, there seem to be handlers like SSH_SMSG_STDOUT_DATA and replacing the default handler with something that doesn't accumulate the string might help:

    # Original code sub cmd { ... unless ($ssh->handler_for(SSH_SMSG_STDOUT_DATA)) { $ssh->register_handler(SSH_SMSG_STDOUT_DATA, sub { $ssh->{_cmd_stdout} .= $_[1]->get_str }); } ... }

    I would try to supply my own callback like this:

    my $ssh = Net::SSH::Perl->new(...); open my $outfh, ">", $filename or die "Couldn't create '$filename' : $!"; binmode $outfh; $ssh->register_handler('stdout', sub { print $outfh $_[1]; });
      If passwordless keys are at all possible, you could also consider File::Remote.

      This is from the example:

      use File::Remote qw(:replace); # read from a remote file open(REMOTE, "host:/remote/file") or die $!; print while (<REMOTE>); close(REMOTE); # writing a local file still works! open(LOCAL, ">>/local/file"); print LOCAL "This is a new line.\n"; close(LOCAL); # Read and write whole files my @file = $remote->readfile("host:/remote/file"); $remote->writefile("/local/file", @file);

      0xbeef

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