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This question is regarding samba file access.

I have created a folder A, and under folder A created two folders B and C. And also created three users A, B and C.

User A has access to all three folders but User B has only access to folder B and User C has only access to folder C.

Permission of B & C folders are:

drwxrwxr-x 3 a b 4096 May 10 16:22 b
drwxrwxr-x 3 a c 4096 May 10 16:43 c


When user B creates any new file under folder B, it's permission becomes

drwxr-x--- 2 b b 4096 May 10 16:21 New Folder

whereas I want it to keep the owner, group and permission same as folder B for any newly created files.

share|improve this question
So you want a to own the file that b created? – Kevin May 10 '13 at 18:22
"User A has access to all three folders" shall mean "write access"? Why do you want to change the owner, or is this about access rights only? – Hauke Laging May 10 '13 at 18:53
a has write access to all three folders but b has only access to folder b. but when user A creates any file under folder B, user b not getting access to that folder or file – PeeJay May 10 '13 at 18:58
ohh i am sorry i missed a main part. folder B and folder C is created under folder A. – PeeJay May 10 '13 at 19:00
@Kevin main question was wrong...I have edited it now. – PeeJay May 10 '13 at 19:03
up vote 8 down vote accepted

Folder b and c are owned by user b and c. A file created by a user will belong to that user.

You can use the user permission for b and c, and the group permissions for a. If you set the SGID bit (g+s) on a folder, created files will get the group permission of that folder.

mkdir a
chown a:a a
chmod g+s a

mkdir b
chown b:a b

mkdir c
chown c:a c

(assuming all users are in a group of the same name.)

share|improve this answer
so i don't need to do sticky bit in folder b and c? – PeeJay May 10 '13 at 19:16
they should get the bit automatically when being created inside a folder with that bit. – michas May 10 '13 at 19:20
thank you very much :-) – PeeJay May 10 '13 at 19:50
no need for thanks, just upvote and accept the answer. ;) – michas May 10 '13 at 20:08
@user1723636, just so you understand the SGID bit and the "sticky bit" are 2 completely different things. See man chmod. – slm May 11 '13 at 10:56

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