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On Tue, Jan 10, 2006 at 10:56:23AM +0000, Gerrit Pape wrote:
> tags 347232 + patch
> quit
>
> On Mon, Jan 09, 2006 at 04:29:19PM +0100, Marco Nenciarini wrote:
> > The problem is here:
> >
> > # Set the kernel 2.6 option only for fresh install
> > test -z "$(GetMenuOpt "kopt" "")" && kopt_2_6="root=$root_device_2_6 ro"
> >
> > # Extract options for specific kernels
> > eval $(ExtractMenuOpts "\(kopt_[a-zA-Z0-9_]\+\)")
> >
> > If the first test fails and the eval argument is empty then dash
> > terminate with exitcode 1.
>
> > This is a simple testcase:
> > tm:~# bash -c "set -e ;/bin/false && : ; eval ''; echo 'END'"; echo $?
> > END
> > 0
> > tm:~# dash -c "set -e ;/bin/false && : ; eval ''; echo 'END'"; echo $?
> > 1
> >
> > if you insert any command with successfull exit status before the
> > empty eval, all work ok:
> > tm:~# bash -c "set -e ;/bin/false && : ; : ; eval ''; echo 'END'"; echo $?
> > END
> > 0
> > tm:~# dash -c "set -e ;/bin/false && : ; : ; eval ''; echo 'END'"; echo $?
> > END
> > 0
>
> Yes, I can confirm this is a bug in dash. The standard says
>
> EXIT STATUS
>
> If there are no arguments, or only null arguments, eval shall
> return a zero exit status; otherwise, it shall return the exit
> status of the command defined by the string of concatenated
> arguments separated by <space>s.
>
> Hi Herbert, please see http://bugs.debian.org/347232
Changed evalstring to return the exit status instead of evalskip. This
allows us to return zero if the string is empty.
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