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From: diamond@jit345.swstokyo.dec.com (Norman Diamond)
Newsgroups: comp.bugs.4bsd,comp.std.c
Subject: Re: Bug in users command
Message-ID: <1991Jan24.021927.19310@tkou02.enet.dec.com>
Date: 24 Jan 91 02:19:27 GMT
References: <18969@rpp386.cactus.org> <6182:Jan2222:06:3991@kramden.acf.nyu.edu> <18981@rpp386.cactus.org> <12360:Jan2320:15:5291@kramden.acf.nyu.edu>
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Reply-To: diamond@jit345.enet@tkou02.enet.dec.com (Norman Diamond)
Organization: Digital Equipment Corporation Japan , Tokyo
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In article <12360:Jan2320:15:5291@kramden.acf.nyu.edu> brnstnd@kramden.acf.nyu.edu (Dan Bernstein) writes:

>The correct call is strncmp(&((*a)[0]),&((*b)[0]),sizeof *a)---or,
>equivalently, strncmp(*a,*b,sizeof *a).
>Chris or Doug or Karl or somebody out there, could you check me on this?

Mr. Bernstein appears to be right.  When *a is an array, and it is not the
operand of sizeof or unary &, so it has to be converted to a pointer to the
first element of *a.  This is true in both of Mr. Bernstein's suggested calls.
--
Norman Diamond       diamond@tkov50.enet.dec.com
If this were the company's opinion, I wouldn't be allowed to post it.