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To: "Julian H. Stacey" <jhs@berklix.com>
In-reply-to: Your message of "Sun, 13 Feb 2011 13:20:58 +0100."
	<201102131221.p1DCKxRY077335@fire.js.berklix.net> 
References: <201102131221.p1DCKxRY077335@fire.js.berklix.net>
Comments: In-reply-to "Julian H. Stacey" <jhs@berklix.com>
	message dated "Sun, 13 Feb 2011 13:20:58 +0100."
Date: Sun, 13 Feb 2011 10:54:42 -0800
From: Bakul Shah <bakul@bitblocks.com>
Message-Id: <20110213185443.4A0FC5B44@mail.bitblocks.com>
Cc: hackers@freebsd.org
Subject: Re: man 3 getopt char * const argv[] - is const wrong ? 
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On Sun, 13 Feb 2011 13:20:58 +0100 "Julian H. Stacey" <jhs@berklix.com>  wrote:
> Hi Hackers
> Ref.: man 3 getopt
> 	int getopt(int argc, char * const argv[], const char *optstring);
> 
> Ref.: K&R 2nd Ed P.211 last indent, 2nd sentence
> 	The purpose of const is to announce objjects that may be
> 	placed in read-only memory, and perhaps to increas opportunities
> 	for optimization
> 
> optstring is obviously const, 
> but I don't see that argv can calim to be const ?
> 
> Did some ISO standard redefine const ? If so URL please ?
> (I learnt my C from K&R #1 decades ago :-)

Not quite what you asked for but this may help in making
sense of const....

$ cdecl				# from /usr/ports/devel/cdecl
explain const char* x
declare x as pointer to const char
explain char * const x
declare x as const pointer to char