From: Mike Frysinger <vapier-aBrp7R+bbdUdnm+yROfE0A@public.gmane.org>
To: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Cc: Jon Grant <jg-hus3n9K41k0@public.gmane.org>,
linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: linux strlen man page accepts NULL?
Date: Tue, 22 Sep 2009 02:43:28 -0400 [thread overview]
Message-ID: <200909220243.30006.vapier@gentoo.org> (raw)
In-Reply-To: <cfd18e0f0909191941s421596b1ne08da9906f4e4d5d-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
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On Saturday 19 September 2009 22:41:41 Michael Kerrisk wrote:
> On Mon, Aug 10, 2009 at 2:06 PM, Jon Grant wrote:
> > On my embedded
> > platform it is the beginning of the boot ROM. However typically 0x0 is
> > an invalid address, in which case strlen should check for NULL, and
> > return 0
>
> I don't think it should check for this. If the addres is invalid, it
> should be treated like any other invalid address -- usually a SIGSEGV
> results.
right. if 0 is a valid address, then strlen() should work. if it isnt valid
and you called strlen() on it anyways, then your code sucks and it should
crash. POSIX does not require special handling of any address, so neither
should Linux.
-mike
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prev parent reply other threads:[~2009-09-22 6:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-07 11:55 linux strlen man page accepts NULL? Jon Grant
[not found] ` <19ac3f7a0908070455s33ecb5efo6810eb7959df1f70-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-08-07 19:51 ` Michael Kerrisk
[not found] ` <cfd18e0f0908071251h27d2d7d6o4c7d8ae2a4c1913f-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-08-10 12:06 ` Jon Grant
[not found] ` <19ac3f7a0908100506j7ec9933gec944f3b5bb92ef0-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-20 2:41 ` Michael Kerrisk
[not found] ` <cfd18e0f0909191941s421596b1ne08da9906f4e4d5d-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-09-22 6:43 ` Mike Frysinger [this message]
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