Sharing files between users with stickybit and setgid

[SpongeB0B]

Hi everyone,

I would like to share files between users ( /home/tester )

I would like that only members of the group tester have access to that folder and can only delete their files

I've tried the following

su

groupadd tester
useradd -m -c "John Doe" John
passwd John

usermod -aG tester John
usermod -aG tester Marie

mkdir /home/tester
cd /home/tester

chown :tester .
chmod +t .
chmod -R g+s .
setfacl -Rm g:tester:rwx,d:g:tester;rwx .

so John and Marie have access to /home/tester they can create files, read the files of the others, but can't edit files from others.. any ideas ?

su

getfacl /home/tester/by_john.txt

# file: home/tester/by_John.txt
# owner: John
# group: tester
user::rw-
group::r-x            #effective:r--
group:tester:rwx        #effective:rw-
mask::rw-
other::---

 

[SpongeB0B]

ooh I think I see what going on, The sticky bit prevent everyone else than the owner of the file to delete it, so therefor edit it too