From: Luis Lavena <luislavena@...>
Date: 2009-12-16T23:55:12+09:00
Subject: Re: Cannot obtain child process exit code on Windows

On Dec 16, 5:32 am, Wi siong Ko <weis...@hotmail.com> wrote:
> Luis Lavena wrote:
> > On Dec 16, 4:18 am, Wi siong Ko <weis...@hotmail.com> wrote:
> >> system('a.bat')
> >> Can anyone help me?
> > When reporting any issue, please include full version of Ruby (ruby -
> > v) that you're using.
>
> > Here an example:
>
> > ruby 1.8.6 (2009-08-04 patchlevel 383) [i386-mingw32]
>
> > irb(main):001:0> system("echo foo && exit /b 29")
> > foo
> > => false
> > irb(main):002:0> $?
> > => #<Process::Status: pid=2296,exited(29)>
>
> > irb(main):001:0> $?
> > => #<Process::Status: pid=2180,exited(0)>
> > irb(main):002:0> system('foo.bat')
> > => false
> > irb(main):003:0> $?
> > => #<Process::Status: pid=2860,exited(29)>
>
> > The exitstatus is correct, what are you trying to achieve shifting the
> > Process:Status exitstatus value?
>
> Luis,
>
> I am using ruby 1.9.1p0 (2009-01-30 revision 21907) [i386-mswin32].
> The right shifting was just trying with example given in
> <http://ruby-doc.org/core-1.8.7/classes/Process/Status.html>
>
> Following your example, the exit code is 0 if is in a batch file. Here
> is my session:
>
> C:\>type foo.bat
> exit /b 29
>
> C:\>irb
> irb(main):001:0> system("echo foo && exit /b 29")
> foo
> => false
> irb(main):002:0> $?
> => #<Process::Status: pid 5712 exit 29>
> irb(main):003:0> system('foo.bat')
>
> C:\>exit /b 29
> => true
> irb(main):004:0> $?
> => #<Process::Status: pid 4488 exit 0>
>

When testing if there is a bug, please try latest patchlevels.

Since you're using mswin32 installation and a really old patchlevel
(zero). Will recommend migrate to RubyInstaller:

http://rubyinstaller.org/

Which is the successor of One-Click Installer and provides, at this
time under RC1, binaries for both 1.8.6 and 1.9.1-p243

--
Luis Lavena