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Date:      Wed, 20 Oct 2010 15:18:16 -0700
From:      Matthew Fleming <mdf356@gmail.com>
To:        Garrett Cooper <gcooper@freebsd.org>
Cc:        KOT MATPOCKuH <matpockuh@gmail.com>, FreeBSD Current <freebsd-current@freebsd.org>, Peter Jeremy <peterjeremy@acm.org>
Subject:   Re: [zfs] Mounting from (...) failed with error 19
Message-ID:  <AANLkTi=0=LeZhwvsY-==OF5ZgH2pGvgoionfVODOMoWb@mail.gmail.com>
In-Reply-To: <AANLkTino7DLY2Cj%2BnAsR1rM9KMEPvoSSxrqqyNDX9jLj@mail.gmail.com>
References:  <4CBCDD3A.9070404@delphij.net> <4CBD26B4.2020205@yandex.ru> <4CBDB17C.4040607@yandex.ru> <AANLkTimhCU%2BppQncCNJicH1AjuM25Z6GH3Jmqckprn=H@mail.gmail.com> <20101020194547.GA94244@server.vk2pj.dyndns.org> <AANLkTino7DLY2Cj%2BnAsR1rM9KMEPvoSSxrqqyNDX9jLj@mail.gmail.com>

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On Wed, Oct 20, 2010 at 1:39 PM, Garrett Cooper <gcooper@freebsd.org> wrote:
> On Wed, Oct 20, 2010 at 12:45 PM, Peter Jeremy <peterjeremy@acm.org> wrote:
>> On 2010-Oct-20 10:50:38 +0400, KOT MATPOCKuH <matpockuh@gmail.com> wrote:
>>>> I fixed it with attached patch.
>>>Omg... Why You are using strcmp, but not strncmp(fs, "zfs", strlen("zfs"))?
>>
>> Can you explain why you think it should be strncmp() please.
>
> I'd say that strcmp is perfectly fine because zfs is a 3 character (4
> if you count NUL) string. The comparison logic is dang near the same:

It wouldn't be about the length of the string, but whether you want a
match on other strings like "zfs2", "zfs_foo", and anything else
prefixed with zfs.  That's the difference between strcmp and
strncmp(... strlen()).

Thanks,
matthew



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