Re: Value of $? after unsetting non-existent shell variable

[Ben Pfaff <blp@cs.stanford.edu>]

"Kevin B. McCarty" <kmccarty@Princeton.EDU> writes:

> So, who's right and who's wrong here?  And if either return value is
> acceptable, could it at least be made consistent between different shells?

SUSv3 says:

        Unsetting a variable or function that was not previously
        set shall not be considered an error and does not cause
        the shell to abort.

...

        EXIT STATUS

             0
                All name operands were successfully unset.
            >0
                At least one name could not be unset.

So it seems that "unset nosuchvariable" should have a return
status of 0.
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