Always permission 777 on mount shared cifs

permissions debian mount smb cifs
David picture David · Nov 7, 2016 · Viewed 22.2k times · Source

I have a little problem when I mount a SMB shared folder from a Synology NAS. I want to mount a shared folder with permissions: git:root 700

But the mounted folder always have permission set to 777 ( even after a chmod 700 without error)

In my /etc/fstab I used this line:

#uid=999 ---> git user
//server/folder /mnt/artifacts cifs username=windowsUser,password=xxxxx,gid=0,uid=999,file_mode=0700,dir_mode=0700,iocharset=utf8 0 0

Do you know why I cannot set my rights to 700 ? I did a mistake ? Something stupid ?

Thanks in advance for your help ;)

Answer

Docnovak picture Docnovak · Aug 22, 2018

If the remote machine user ID and the local machine user ID do not match, the permissions will default to 777. Mount.cifs doesn't support umask, so instead "noperm" option can be used. This way even if the permissions of the users on the local and remote machines don't match, the user will still be allowed to read and write to the folder, the equivalent of umask=000. 

//address/location /mount/location cifs username=username,password=password,noperm,vers=2.0 0 0

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