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First I set the setgid bit, so that files/folder under directory will be created with the same group as directory.

chmod g+s <directory>

Then I tried to change the folder's permission structure, so that the group has rwx access to it by:

setfacl -R -m g::rwx /<directory>

Problem

Now, root came by and creates a new folder (with files) under this directory which leads to:

drwxr-xr-x+ 3 root homecontrol 4096 May 11 20:20 '<folder>'

So homecontrol was set properly as group, but the write permission is missing.

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  • I guess you just misunderstand the (stupid) output of ls... What is the output of `getfacl '/<directory>/<folder>'? Commented May 13, 2023 at 22:12
  • You are absolutely right! getfacl on the directory displays proper permissions like: # owner: root # group: homecontrol group::rwx So my problem is, that the owner is still root, which shall be homecontrol. Is there a way i can set the default owner to homecontrol? Commented May 14, 2023 at 14:59
  • You didn't mention this problem in your question even though the ls output made it quite clear that the owner is root... Commented May 14, 2023 at 15:08
  • I didn't know that i have a "owner" problem here, i thought it would be the missing write permission. Commented May 14, 2023 at 15:37

2 Answers 2

Reset to default
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You need to add the default keyword:

shadur@proteus:~/test$ mkdir testdir shadur@proteus:~/test$ setfacl -m default:g::rwx testdir/ shadur@proteus:~/test$ touch testdir/test2 shadur@proteus:~/test$ ls -lsa testdir/ total 8 4 drwxr-xr-x+ 2 shadur shadur 4096 May 13 14:59 . 4 drwxr-xr-x 3 shadur shadur 4096 May 13 14:57 .. 0 -rw-rw-r-- 1 shadur shadur 0 May 13 14:59 test2
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  • Sorry, i forgot to add -d to the command above. But newertheless, even with "default", there is no write permission for group after creating a new file afterwards. Commented May 13, 2023 at 16:58
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You cannot enforce the owner of a new file; you can only change it after the file has been created. This can be done with

  • a cron job / Systemd timer (very simple)
  • inotify (i.e. incrond or inotifywait) if you need short response times or have directories with huge amounts of files
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