Re: shift "fatal error"

[Guido Berhoerster <gber@xxxxxxxxxxxx>]

* Dan Muresan <danmbox@xxxxxxxxx> [2011-03-10 19:41]:
> Hi, is there some consensus on whether shift should cause a "fatal
> error" as reported by Herbert against bash:
> 
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=252378
> 
> # doesn't print anything
> dash -c 'shift 2; echo hi'
> 
> My copy of SUSv3 doesn't seem to imply any "fatal error" handling
> requirement for shift:
> 
> --- 8-X ---
> EXIT STATUS
> 
> The exit status is >0 if n>$#; otherwise, it is zero.
> 
> CONSEQUENCES OF ERRORS
> 
> Default.
> --- 8-X ---

For IEEE Std 1003.1-2008 see section 2.8.1 "Consequences of
Shell Errors": a "utility syntax error (option or operand error)"
with special built-ins shall cause the shell to exit. That's what
dash, ksh93, and pdksh do.

-- 
Guido Berhoerster
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