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comp.lang.ruby

IO.popen fails to pen persistent ssh connection

Hector Quiroz

10/3/2008 2:51:00 PM

What the?
The following code(see below) works fine in a few of my ruby scripts but
fails on others with the following message:

'/scripts/ruby/testssh.rb:4: undefined method `exitstatus' for
nil:NilClass (NoMethodError)'.

I know ssh is working and I can run ssh commands to #{hostname} using
#{username} credentials. I use this exact code in other scripts from the
same workstation, ssh'ing to the same remote host and it works fine.

I've copied the following lines and pasted them unto a new file and it
still fails with the above message.


#!/usr/bin/ruby -w
ssh = IO.popen("ssh #{username}@#{hostname} -T", "w+")
status = $?
break unless (status.exitstatus == 0)


Help...
Thank you

Hector
--
Posted via http://www.ruby-....
1 Answer

ara.t.howard

10/3/2008 3:53:00 PM

0


On Oct 3, 2008, at 8:51 AM, Hector Quiroz wrote:

> '/scripts/ruby/testssh.rb:4: undefined method `exitstatus' for
> nil:NilClass (NoMethodError)'.
>
> I know ssh is working and I can run ssh commands to #{hostname} using
> #{username} credentials. I use this exact code in other scripts from
> the
> same workstation, ssh'ing to the same remote host and it works fine.
>
> I've copied the following lines and pasted them unto a new file and it
> still fails with the above message.
>
>
> #!/usr/bin/ruby -w
> ssh = IO.popen("ssh #{username}@#{hostname} -T", "w+")
> status = $?
> break unless (status.exitstatus == 0)
>

the process has not exited yet - $? is therefore nil.

a @ http://codeforp...
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