Thomas Costigliola wrote:
> This segfaults in C at the (*JDo) function call:

It looks like you're missing a call to JInit.

Googling for JDo JInit found me 
http://www.jsoftware.com/books/help/user/oldwin.htm

Jinit() returns a void pointer which needs to be the 
first argument to JDo, the character argument you're 
providing needs to be the second argument.

-- 
Raul


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