From: Stefano Crocco <stefano.crocco@...>
Date: 2008-10-02T01:10:42+09:00
Subject: Re: Remotely passing value on system() or %x[]

Alle Wednesday 01 October 2008, Bikas De simex ha scritto:
> Hi,
>
> I want to execute a remote bash script that take one string argument by
> using system() or %x[]. But the value argument is not transmited
> remotely.
>
> Here my program
>
> def trait_fic(repfic)
>   Find.find(repfic) do |path|
>   unless FileTest.directory?(path)
>   dirc="#{path}".split(/\//)
>   puts "#{dirc[3]}\n"
>   system('plink -pw ppp xxx@yyyy /tmp/essai.ksh #{dirc[3]}')
>   end
> end
> end
>
> trait_fic('I:/toto')
>
> I have got:
> >ruby essai0.rb
>
> PTOTO -------------------------> This is done by puts "#{dirc[3]}\n"
> <---
> Le batch traité est
>
> ..........................
>
> /tmp/mma/essai.ksh[36]: syntax error at line 214 : `"Nous traitons le
> batch $BATH ...n"' unexpected
>
> Is there any way to transmit remotely this value. I also try net/ssh
> with no succes.
> Thanks in Advance

Are you aware that string interpolation doesn't happen in single quoted 
strings? Since argument to system is a string enclosed in single quotes, the 
command itself is 

'plink -pw ppp xxx@yyyy /tmp/essai.ksh #{dirc[3]}'

instead of 

'plink -pw ppp xxx@yyyy /tmp/essai.ksh PTOTO'

which, I guess, is what you want. To achieve this, you need to use a double 
quoted string:

system("plink -pw ppp xxx@yyyy /tmp/essai.ksh #{dirc[3]}")

I hope this helps

Stefano