From:
Operating system: Ubuntu 10.04
PHP version: 5.3.3
Package: Semaphore related
Bug Type: Bug
Bug description:sem_get with auto_release=0 is released in case of shutdown
Description:
------------
If I write a program with a sem_get and auto_release=0, in case of
shutdown, an other program should not be available to take the semaphore.
Launch two times the following script (in cli in my case).
Kill the first with Ctrl+C within 10 secs. The second display "Acquire".
PHP Version : Ubuntu 5.3.2-1ubuntu4.2
Test script:
---------------
$seg = sem_get("123554", 1, 0666, 0) ;
sem_acquire($seg);
echo "Acquire\n";
sleep (10);
Expected result:
----------------
Don't display "Acquire" and stay pending until I remove the semaphore by
another way.
If you remove the sleep, you shouldn't be available to run the script 2
times : the first display Acquire, and the second should wait until the
semaphore is removed.
Actual result:
--------------
Display "Acquire" and then enter in sleep 10.
--
Edit bug report at http://bugs.php.net/bug.php?id=52701&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=52701&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=52701&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=52701&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=52701&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=52701&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=52701&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=52701&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=52701&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=52701&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=52701&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=52701&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=52701&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=52701&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=52701&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52701&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=52701&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=52701&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=52701&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=52701&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=52701&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=52701&r=mysqlcfg
