[Groff] number register to check if running in unsafe mode?

[Dorai Sitaram]

After checking the docs, it doesn't seem like groff offers a register or any 
other way for checking if it is being run in unsafe mode.  Would this not be a 
good idea?  I have some macros that use unsafe requests to create and update an 
index.   I'd like for these macros to be silent or issue maybe one meaningful 
diagnostic if running in safe mode.   Or perhaps do something else relevant and 
possible in safe mode.

A typical scenario might involve the author already having run the document in 
unsafe mode to create the requisite index files.  She then distributes it all 
to someone else who doesn't really need to run groff in unsafe mode (because 
the index files are already present), and may in fact be leary of using unsafe 
mode on a document that is not his.  All the more reason not to have his safe 
run of groff alarm him with a long sequence of error messages.

--d


      
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