From: Toshi <tsyk@...>
Date: 2001-12-01T17:29:26+09:00
Subject: [ruby-talk:27165] Re: external commands


On Sat, 1 Dec 2001 16:31:02 +0900
Michele De Lorenzi <michelemdl@libero.it> wrote:

> If someone had already answered to me, please can you re send you answer
> because I loose some e-mails.
> Thanks.
> On ven, 2001-11-30 at 22:43, michelemdl@libero.it wrote:
> > I need to exec an external programm from a ruby script.
> > The name of the external command is ALADDIN.
> > This is what I do under Linux:
> > 
> > ...
> > 'ALADDIN -f inputfile.std > outputfile.std' #line in ruby script to 
> > call the external program ALADDIN #
> > ...
> > 
> > Doing the same under windows doesn' t work. How can I do that under 
> > windows?


I think you should check an environment variable 'COMSPEC'.

C:\MyData>type foo.txt
beta
alpha
gamma

C:\MyData>set ComSpec
ComSpec=C:\WINNT\system32\cmd.exe

C:\MyData>irb
irb(main):001:0> puts `sort foo.txt`
alpha
beta
gamma
nil
irb(main):002:0> puts `sort foo.txt > nul`

nil
irb(main):003:0> exit

C:\MyData>set ComSpec=C:\BadPath\Or\Empty\cmd.exe

C:\MyData>irb
irb(main):001:0> puts `sort foo.txt`
alpha
beta
gamma
nil
irb(main):002:0> puts `sort foo.txt > nul`
Errno::ESRCH: No such process - "sort foo.txt > nul"
        from (irb):2:in ``'
        from (irb):2
irb(main):003:0>

-- 
Toshi <tsyk@yk.rim.or.jp>