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Doc Bug #71956 sem_get(0) creating an infinite amount of semaphores
Submitted: 2016-04-04 09:30 UTC Modified: 2020-03-14 15:34 UTC
Votes:2
Avg. Score:4.0 ± 1.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:-1 (-100.0%)
From: kakkau at grr dot la Assigned: cmb (profile)
Status: Closed Package: Semaphore related
PHP Version: Irrelevant OS:
Private report: No CVE-ID: None
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 [2016-04-04 09:30 UTC] kakkau at grr dot la 
Description:
------------
1. run sem_get(0,0) multiple times
2. check ipcs -s
3. see there are multiple semaphores created

For any other integer <> 0 sem_get works as expected.
It returns a resource w/o creating another semaphore.

Test script:
---------------
<?php

sem_get(0,0);
sem_get(0,0);

?>

Expected result:
----------------
No creation of another semaphore.

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 [2020-03-01 22:56 UTC] cmb@php.net
-Summary: sem_get: creating an infinite amount of semaphores +Summary: sem_get(0) creating an infinite amount of semaphores -Status: Open +Status: Verified -Type: Bug +Type: Documentation Problem
 [2020-03-01 22:56 UTC] cmb@php.net 
sem_get() calls semget() with the unmodified key, and IPC_PRIVATE
likely has the value 0, so the behavior is expected, albeit
undocumented.
 [2020-03-14 15:33 UTC] cmb@php.net 
Automatic comment from SVN on behalf of cmb
Revision: http://svn.php.net/viewvc/?view=revision&amp;revision=349425
Log: Fix #71956: sem_get(0) creating an infinite amount of semaphores
 [2020-03-14 15:34 UTC] cmb@php.net
-Status: Verified +Status: Closed -Assigned To: +Assigned To: cmb
 [2020-03-14 15:34 UTC] cmb@php.net 
This bug has been fixed in the documentation's XML sources. Since the
online and downloadable versions of the documentation need some time
to get updated, we would like to ask you to be a bit patient.

Thank you for the report, and for helping us make our documentation better.
 [2020-03-14 15:34 UTC] phpdocbot@php.net 
Automatic comment on behalf of cmb
Revision: http://git.php.net/?p=doc/en.git;a=commit;h=54a343afdc91671e6dc77b8dceb2e8116223337d
Log: Fix #71956: sem_get(0) creating an infinite amount of semaphores
 [2020-03-14 22:52 UTC] mumumu@php.net 
Automatic comment from SVN on behalf of mumumu
Revision: http://svn.php.net/viewvc/?view=revision&amp;revision=349438
Log: Fix #71956: sem_get(0) creating an infinite amount of semaphores
 [2020-03-14 22:55 UTC] phpdocbot@php.net 
Automatic comment on behalf of mumumu
Revision: http://git.php.net/?p=doc/ja.git;a=commit;h=cd6912645d81b527fdc5e49229aba6050a0a812b
Log: Fix #71956: sem_get(0) creating an infinite amount of semaphores
 [2020-12-30 11:59 UTC] nikic@php.net 
Automatic comment on behalf of mumumu
Revision: http://git.php.net/?p=doc/ja.git;a=commit;h=e0597a2c43d1b311e0214a729e0e80753b10e421
Log: Fix #71956: sem_get(0) creating an infinite amount of semaphores
 
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