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Date:      Tue, 5 Oct 2010 01:23:02 -0700
From:      Garrett Cooper <gcooper@FreeBSD.org>
To:        Daichi GOTO <daichi@ongs.co.jp>
Cc:        freebsd-fs@freebsd.org, freebsd-current@freebsd.org
Subject:   Re: fcntl always fails to delete lock file, and PID is always -6464
Message-ID:  <AANLkTin=9MKZGf7RREfcReamdJpCQ56BMn_RKy8eOU0-@mail.gmail.com>
In-Reply-To: <20101005153410.598e4484.daichi@ongs.co.jp>
References:  <20101004123725.65d09b9e.daichi@ongs.co.jp> <AANLkTinZg3n3wDUzQFPv_Gq1o2hswGL3%2B4o0brmTi0-h@mail.gmail.com> <20101004144927.36822f07.daichi@ongs.co.jp> <AANLkTimVcLVdULyAAJD-_TaC5OLj%2BaZVNa=%2BSaiN6PKv@mail.gmail.com> <20101005093826.17432b1e.daichi@ongs.co.jp> <AANLkTi=w5ZAfRymSYbL6X37uyYX17J2dW8LHVcPXZ_%2Bb@mail.gmail.com> <20101005153410.598e4484.daichi@ongs.co.jp>

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2010/10/4 Daichi GOTO <daichi@ongs.co.jp>:
> Thanks nice test tool :) =C2=A0And at last I got it excepting one mystery=
!
>
> On Mon, 4 Oct 2010 20:17:08 -0700
> Garrett Cooper <gcooper@FreeBSD.org> wrote:
>> Following through the same process on FreeBSD...
>>
>> Window 1:
>> $ ls -l /tmp/lockfile
>> ls: /tmp/lockfile: No such file or directory
>> $ ./test_fcntl
>>
>> Window 2:
>>
>> $ ls -l /tmp/lockfile
>> -rwsr-x--- =C2=A01 garrcoop =C2=A0wheel =C2=A00 Oct =C2=A04 20:14 /tmp/l=
ockfile
>> $ ./test_fcntl
>> test_fcntl: fcntl: Resource temporarily unavailable
>
> Just my mystery is as follow:
>
> Windows 1:
> % ./test_fcntl
> My pid: 43490
>
> Windows 2:
> % ls -l /tmp/lockfile
> -r-sr-x--- =C2=A01 daichi =C2=A0wheel =C2=A00 10=E6=9C=88 =C2=A05 15:02 /=
tmp/lockfile =C2=A0 =C2=A0<--- is it weird, isn't it?
> % ./test_fcntl
> test_fcntl: open: Permission denied
> %
>
> Oops... What's wrong... /tmp is as follow:
>
> % mount | grep tmp
> /dev/ada0s1f on /tmp (ufs, local, noatime, soft-updates)
> % dumpfs /tmp | grep journal
> flags =C2=A0 soft-updates+journal
> %
>
> And working scene:
>
> Windows 2:
> % chmod u+w /tmp/lockfile
> % ls -l /tmp/lockfile
> -rwsr-x--- =C2=A01 daichi =C2=A0wheel =C2=A00 10=E6=9C=88 =C2=A05 15:22 /=
tmp/lockfile
> % ./test_fcntl
> My pid: 43646
> test_fcntl: fcntl[1]: Resource temporarily unavailable
> PID=3D43490 has the lock
> %

What's your umask and what are the permissions on /tmp?



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