From owner-freebsd-audit  Wed Jul 18  2:26:52 2001
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Date: Wed, 18 Jul 2001 19:24:11 +1000 (EST)
From: Bruce Evans <bde@zeta.org.au>
X-Sender: bde@besplex.bde.org
To: Dag-Erling Smorgrav <des@ofug.org>
Cc: Peter Pentchev <roam@orbitel.bg>,
	Mike Barcroft <mike@q9media.com>,
	David Malone <dwmalone@maths.tcd.ie>, audit@FreeBSD.ORG
Subject: Re: inetd(8) warns patch
In-Reply-To: <xzpr8vf1gve.fsf@flood.ping.uio.no>
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On 17 Jul 2001, Dag-Erling Smorgrav wrote:

> Peter Pentchev <roam@orbitel.bg> writes:
> > Basically, the problem is that although writev(2) doesn't need to write
> > to the buffer pointed to in its iov parameter, readv(2) does.
> 
> You can work around this by casting the LHS to (const char *):
> 
>      (const char *)iov[n].iov_base = str;
>      iov[n].iov_len = len;

Only if you are not writing in C.  E.g., this is just a syntax error
according to TenDRA:

Script started on Wed Jul 18 19:17:01 2001
ttyv2:bde@besplex:/tmp> cat z.c
#include <sys/types.h>
#include <sys/uio.h>

struct iovec iov[1];
char *str;
size_t len;
const int n = 1;

void
test(void)
{
	(const char *)iov[n].iov_base = str;
	iov[n].iov_len = len;
}
ttyv2:bde@besplex:/tmp> tcc -Ysystem -c z.c
"z.c", line 12: Error:
  [Syntax]: Parse error before '='.
  [Syntax]: Can't recover from this error.

ttyv2:bde@besplex:/tmp> exit

Script done on Wed Jul 18 19:17:09 2001

Bruce


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