Bug #76837 [Com]: chgrp doesn't work for secondary group

Edit report at https://bugs.php.net/bug.php?id=76837&edit=1 ID: 76837 Comment by: spam2 at rhsoft dot net Reported by: bugs dot php dot net at register dot conactive dot com Summary: chgrp doesn't work for secondary group Status: Closed Type: Bug Package: *Directory/Filesystem functions Operating System: Ubuntu 16.04 PHP Version: 7.2.9 Block user comment: N Private report: N New Comment: and even if - PHP don't implement such system functions at it's own but calling the underlying OS Previous Comments: ------------------------------------------------------------------------ [2018-09-02 16:38:45] bugs dot php dot net at register dot conactive dot com Sorry, false alarm. I had forgotten to restart the fpm manager process. After restarting it works! Bug can be closed! ------------------------------------------------------------------------ [2018-09-02 16:31:03] bugs dot php dot net at register dot conactive dot com Description: ------------ Problem with chgrp: it doesn't change group for a secondary group. Documentation on http://php.net/chgrp says "other users may change the group of a file to any group of which that user is a member." So, this implies it can change it not only to the primary group but also to any secondary group identfied by /etc/group. Also, the function would be pretty much useless then as only the super user could use it. That doesn't work. I added the user www-data to the group vmail and then tried to chgrp a file that is owned by www-data (which is also the pool user) to vmail. I get a warning: chgrp(): Operation not permitted Might be an fpm problem? e.g. fpm not being aware that user also belongs to other groups as group = www.data ? I did not check if chgrp works with primary group. That was not the goal. I tested on the shell by su-ing to www-data and was able to change the group this way. So, the user www-data does have enough permissions. php-fpm just doesn't seem to recognize that. Expected result: ---------------- chgrp function should be able to chgrp to *any* (=every) group the owner of the fpm process belongs to. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=76837&edit=1