Prototypes (variable # of arguments)

Article View: comp.std.c

Article #5952

#5952

From: Anton Rang
Date: Fri, 28 Apr 1989 19:33

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Is it possible to declare a prototype with an "optional" final
argument?  I'm trying to do a prototype for BSD's "open", which takes
either 2 or 3 arguments.  At the moment, I have:

	extern int open(char *, int, ...);

Is there any way to limit this to only take 2 or 3 arguments (as
opposed to 2 or more)?

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!accuvax.nwu.edu!tank!eecae!cps3xx!rang
From: rang@cpsin3.cps.msu.edu (Anton Rang)
Newsgroups: comp.std.c,comp.lang.c
Subject: Prototypes (variable # of arguments)
Summary: Can I declare a "2 or 3" argument function?
Message-ID: <2775@cps3xx.UUCP>
Date: 28 Apr 89 19:33:28 GMT
Sender: usenet@cps3xx.UUCP
Reply-To: rang@cpswh.cps.msu.edu (Anton Rang)
Organization: Michigan State University, Computer Science Dept.
Lines: 15