2010/10/4 Daichi GOTO <dai...@ongs.co.jp>:
> Thanks nice test tool :)  And at last I got it excepting one mystery!
>
> On Mon, 4 Oct 2010 20:17:08 -0700
> Garrett Cooper <gcoo...@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---  1 garrcoop  wheel  0 Oct  4 20:14 /tmp/lockfile
>> $ ./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---  1 daichi  wheel  0 10月  5 15:02 /tmp/lockfile    <--- 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   soft-updates+journal
> %
>
> And working scene:
>
> Windows 2:
> % chmod u+w /tmp/lockfile
> % ls -l /tmp/lockfile
> -rwsr-x---  1 daichi  wheel  0 10月  5 15:22 /tmp/lockfile
> % ./test_fcntl
> My pid: 43646
> test_fcntl: fcntl[1]: Resource temporarily unavailable
> PID=43490 has the lock
> %

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