Re: eqn returns 0 on error

[Werner LEMBERG]

> When eqn encounters erroneous input, it normally continues
> processing, presumably to try to find multiple errors in one pass.
> When it eventually terminates, though, it returns 0, indicating
> successful execution.

This is correct.  eqn only returns non-zero for fatal errors.  As far
as I can see, this behaviour is true for all preprocessors of groff.

A possible improvement would be to add a command line option to all
programs of the groff suite which makes normal errors return as fatal.
This is a rather trivial change but a lot of work if you document that
also...  Sorry in advance for not having time to do that.

Any takers?  I'm glad to assist.


   Werner