From: Milo Thurston <knirirr@...>
Date: 2008-03-11T02:26:17+09:00
Subject: sftp.put_file problems on Linux

I have written a simple script to locate particular files on a server
and copy them elsewhere with sftp. There is one particular part of the
script that gives me some trouble:

<pre>
begin
  sftp.put_file("#{ramdisk}/#{file}","#{dst_dir}")
rescue
  puts "Message: #{sftp.status[:code]} (#{sftp.status[:message]})"
end
</pre>

The code dies at this point, with this error.

<pre>
Message: 0 (Success)
/var/lib/gems/1.8/gems/net-sftp-1.1.1/lib/net/sftp/operations/abstract.rb:78:in
`do_status': Net::SFTP::Operations::StatusException (4, "Failure")
(Net::SFTP::Operations::StatusException (4, "Failure"))
        from
/var/lib/gems/1.8/gems/net-sftp-1.1.1/lib/net/sftp/session.rb:221:in
`do_status'
        from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
`to_proc'
        from
/var/lib/gems/1.8/gems/net-sftp-1.1.1/lib/net/sftp/protocol/01/impl.rb:92:in
`call'
        from
/var/lib/gems/1.8/gems/net-sftp-1.1.1/lib/net/sftp/protocol/01/impl.rb:92:in
`call_on_status'
        from
/var/lib/gems/1.8/gems/net-sftp-1.1.1/lib/net/sftp/protocol/03/impl.rb:37:in
`do_status'
        from
/var/lib/gems/1.8/gems/net-sftp-1.1.1/lib/net/sftp/protocol/01/impl.rb:189:in
`dispatch'
        from
/var/lib/gems/1.8/gems/net-sftp-1.1.1/lib/net/sftp/protocol/driver.rb:189:in
`do_data'
        from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
`to_proc'
         ... 20 levels...
        from
/var/lib/gems/1.8/gems/net-ssh-1.1.2/lib/net/ssh/session.rb:138:in
`initialize'
        from /var/lib/gems/1.8/gems/net-ssh-1.1.2/lib/net/ssh.rb:47:in
`new'
        from /var/lib/gems/1.8/gems/net-ssh-1.1.2/lib/net/ssh.rb:47:in
`start'
        from ./sftp_script.rb:26
</pre>

Everything else is fine - the connection is set up properly and I can
use sftp.mkdir. Also, if I replace put_file with this, it works:

<pre>
scp_command = "scp #{ramdisk}/#{file}
#{user}@#{host}:/home/#{user}/#{dst_dir}"
unless system("#{scp_command}")
  raise "Could not scp #{file}."
end
</pre>

This is less than ideal due to filling up the logs of the receiving
machine, though.
Does anyone know what might be causing the problem with put_file?
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