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I'm mounting my NAS with this line in fstab

// /mnt/net/synonas/syno.1 cifs credentials=/home/rasp/.smbcredentials.synonas,iocharset=utf8,file_mode=0777,dir_mode=0777 0 0

I can create, delete, copy files of any size, but whenever I try to modify a newly created one I get a permission denied. Files mounted before are ok since they're mounted with 0777.

I think it has to do with my umask : 0022, the ownership is somehow given to 'users' after creation, so I cannot modify it (rw-r--r--, and I'm logged as 'rasp' not 'users'). What troubles me is that I can still delete any file... Any help would be appreciated !

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did you tried gid=rasp and forcegid as options? samba.org/samba/docs/man/manpages-3/mount.cifs.8.html –  patricks Apr 30 '12 at 12:35
tried the uid version and it worked liked a charm, thank's :) –  r---------k May 2 '12 at 1:14

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