Welcome to WebmasterWorld Guest from

Forum Moderators: coopster & jatar k

Message Too Old, No Replies

php wont delete 775 dir chmod

2:37 am on Sep 6, 2010 (gmt 0)

Junior Member

5+ Year Member

joined:May 16, 2009
posts: 86
votes: 0

OK help me understand this.

I have 2 users in my linux system that are BOTH part of "web-users" group.

one is www-data used by the webserver and php-cgi
one is my ftp-user

when I upload files via ftp they are set to 775 for dirs and 664 for files, when I run a script on the server (so same group like the ftp user) to delete that directory and files inside: unlink for files works ok but the command rmdir doesnt work returning permission denied!?

why is that 775 means that the group's user can delete it just like 664 for files.

3:47 am on Sept 7, 2010 (gmt 0)

Senior Member from KZ 

WebmasterWorld Senior Member lammert is a WebmasterWorld Top Contributor of All Time 10+ Year Member Top Contributors Of The Month

joined:Jan 10, 2005
posts: 2938
votes: 24

If you want to delete a directory, you effectively need change permissions to the parent directory, because the rmdir() action needs to delete one entry from the parent directory list. Therefore 775 permissions on the directory which you want to remove is not enough to remove it, you also need to set proper rights on the parent.
7:34 pm on Sept 7, 2010 (gmt 0)

Senior Member

WebmasterWorld Senior Member rocknbil is a WebmasterWorld Top Contributor of All Time 10+ Year Member

joined:Nov 28, 2004
votes: 0

This is an issue of ownership, not file/directory permissions. If you have a script create a directory, create tools to allow the script to remove the directory. Only root can effectively change ownership, and you don't really want your FTP user *or* PHP running as root.