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From: kucharsk@uts.amdahl.com (William Kucharski)
Newsgroups: comp.unix.questions
Subject: Re: SysV bcopy?
Summary: Using memcpy(3) might not work in some cases...
Keywords: bcopy SysV BSD
Message-ID: <0eqxk1d9CO1010rd0EQ@amdahl.uts.amdahl.com>
Date: 20 Mar 89 21:36:10 GMT
References: <114@sherpa.UUCP> <9876@smoke.BRL.MIL>
Reply-To: kucharsk@amdahl.uts.amdahl.com (William Kucharski)
Organization: Amdahl Coup, UTS Products Hen House
Lines: 26

I just thought I'd add my $.02 to the SYSV bcopy traffic.

Using memcpy(3) will work in most cases on most machines.

However, a problem may occur when doing an overlapping copy:

From the SYSV man page CAVEATS:

"Character movement is performed differently in different implementations.
 Thus overlapping moves may yield suprises."

The BSD (or at least SunOS 4.0) man page says of bcopy:

"Overlapping strings are handled correctly."

Just a little caveat...

-- 
					William Kucharski

ARPA: kucharsk@uts.amdahl.com
UUCP: ...!{ames,decwrl,sun,uunet}!amdahl!kucharsk

Disclaimer:  The opinions expressed above are my own, and may not agree with
	     those of any other sentient being, not to mention those of my 
	     employer.  So there.