I tried the php function chmod($sem, 0644) which works fine even if it
converts the octal number too, cf. xdebug trace file:
0.0037 50280 -> chmod('/tmp/1521387531.sem', 420)
...myScripts/test.php:11
>=> TRUE
0.0039 50280 -> shmop_open(2013277949, 'c', 420, 1)
...myScripts/test.php:15
>=> FALSE
So I think there must be something else wrong with my shmop_open. I also
tried shmop_open($sem_key, "c", "0644", 1) and shmop_open($sem_key, "c",
420, 1), which doesn´t work either.
Thank you for your help,
Rolf.
Peter Ford-4 wrote:
>
> Richard Lynch wrote:
>> On Thu, December 6, 2007 2:44 am, Rolf_ wrote:
>>> I have a problem working with shmop_open() in a Solaris environment.
>>> The
>>> following cli-script works fine, except shmod_open returns a warning
>>> 'unable
>>> to attach or create shared memory segment':
>>>
>>> <?php
>>> $sem = "/tmp/" . rand() . ".sem";
>>> touch ($sem);
>>> echo "sem $sem \n";
>>>
>>> $sem_key = ftok($sem, 'w');
>>> echo "sem_key $sem_key \n";
>>>
>>> if ($sem_key == -1) { die ("ftok error"); }
>>>
>>> $shm_id = shmop_open($sem_key, "w", 0644, 1);
>>> echo "shm_id $shm_id\n";
>>> ?>
>>>
>>> I checked the $sem_key with the Solaris ipcs command. The file exists
>>> and
>>> the read/write rights are correct. I tried explictly to call
>>> shmop_open with
>>> the right key - the error message remains the same.
>>>
>>> Checking out different access mode like "r" does not succeed too. In
>>> the
>>> Xdebug output, php changes the value 0644 to 420, i.e.
>>> shmop_open(1258300033, 'w', 420, 1). Of course, I compiled php with
>>> --enable-shmop.
>>>
>>> Does anyone has an idea what I might also check?
>>
>> Perhaps the 0644 needs to be expressed in some other way?
>>
>> I know it works fine that way for chmod and friends, so I wouldn't
>> expect it, but...
>>
>> Or maybe 420 *IS* the right value, and you're on a red herring.
>>
>> Try Googling for the error message and Solaris if you haven't done
>> that yet.
>>
>
> The problem is that 0644 == 420, because 0644 is parsed as "644 base 8"
> (the
> zero prefix forces the number to octal...)
> So 420 (decimal) is actually the correct value. RTFM for chmod, which
> gives you
> a big hint about this...
>
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