Xref:	news2.mv.net comp.os.msdos.djgpp:4306
Newsgroups:	comp.os.msdos.djgpp
From:	tgl AT netcom DOT com (Tom Lane)
Subject:	Re: printf("%s",0) - Segmentation fault
Message-ID:	<TGL.96May27201732@netcom9.netcom.com>
Sender:	tgl AT netcom9 DOT netcom DOT com
Organization:	Netcom Online Communications Services
References:	<31A987B6 DOT F1 AT algonet DOT se>
Date:	Tue, 28 May 1996 03:17:32 GMT
Lines:	13
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Rikard Thunberg <thunberg AT algonet DOT se> writes:
> Is it possible to tell the compiler what to do in this situation?

Sure:

	printf("%s", (ptr ? ptr : "(Null)"));

If you rely on printf not to dereference a null pointer that you hand
it, you deserve what you get.  Ditto for any other library routine
that's not specifically documented to handle a null pointer specially
--- and darn few are, at least in the ANSI C spec.

			regards, tom lane

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