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From: bmh@unc.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: help for routine to handle exit conditions
Message-ID: <972@unc.unc.UUCP>
Date: Thu, 19-Feb-87 16:04:55 EST
Article-I.D.: unc.972
Posted: Thu Feb 19 16:04:55 1987
Date-Received: Fri, 20-Feb-87 21:15:49 EST
Distribution: na
Organization: CS Dept, U. of N. Carolina, Chapel Hill
Lines: 23


  I'm attempting to write a routine to handle exit conditions for
programs to be written for an IBM PC.  The conditions I wish to 
trap and handle in a robust manner include ^C and ^<break>.  I
am using the Manx Aztec C compiler and was not successful in 
getting the signal library function to work properly for me
when I passed my own routine as a argument rather than using
their predefined selections of ignoring or terminating on such
conditions. 
  I would be interested in hearing from people who have written
routines to do similar things (in Manx C or assembler), and examples
would be appreciated.  If there is enough interest I will submit
a followup summary.
  
  Additionally the Manx signal call only allows you to setup a
procedure for one time (apparently) as it resets the interrupt
to the default terminate meaning once your procedure is called.  
Does anyone know whether this is because of DOS/PC considerations 
or simply a limitation of Manx's code?

				Thanks,
					Brad Hemminger
					{...!mcnc!unc!bmh}