1Mount options for ADFS 2---------------------- 3 4 uid=nnn All files in the partition will be owned by 5 user id nnn. Default 0 (root). 6 gid=nnn All files in the partition willbe in group 7 nnn. Default 0 (root). 8 ownmask=nnn The permission mask for ADFS 'owner' permissions 9 will be nnn. Default 0700. 10 othmask=nnn The permission mask for ADFS 'other' permissions 11 will be nnn. Default 0077. 12 13Mapping of ADFS permissions to Linux permissions 14------------------------------------------------ 15 16 ADFS permissions consist of the following: 17 18 Owner read 19 Owner write 20 Other read 21 Other write 22 23 (In older versions, an 'execute' permission did exist, but this 24 does not hold the same meaning as the Linux 'execute' permission 25 and is now obsolete). 26 27 The mapping is performed as follows: 28 29 Owner read -> -r--r--r-- 30 Owner write -> --w--w---w 31 Owner read and filetype UnixExec -> ---x--x--x 32 These are then masked by ownmask, eg 700 -> -rwx------ 33 Possible owner mode permissions -> -rwx------ 34 35 Other read -> -r--r--r-- 36 Other write -> --w--w--w- 37 Other read and filetype UnixExec -> ---x--x--x 38 These are then masked by othmask, eg 077 -> ----rwxrwx 39 Possible other mode permissions -> ----rwxrwx 40 41 Hence, with the default masks, if a file is owner read/write, and 42 not a UnixExec filetype, then the permissions will be: 43 44 -rw------- 45 46 However, if the masks were ownmask=0770,othmask=0007, then this would 47 be modified to: 48 -rw-rw---- 49 50 There is no restriction on what you can do with these masks. You may 51 wish that either read bits give read access to the file for all, but 52 keep the default write protection (ownmask=0755,othmask=0577): 53 54 -rw-r--r-- 55 56 You can therefore tailor the permission translation to whatever you 57 desire the permissions should be under Linux. 58