The documentation is a little bit confusing here -- the "HintSystem" property is not about the device access or filesystem permissions, it's about "accessing" UDisks functions using PolicyKit.
See the policies here [1] for mounting filesystems -- "normal" devices can be mounted by a "regular" user (in an active session), but "system" devices require root authentication (similar policies exist for unlocking encrypted devices, ejecting drives etc.) [1] https://github.com/storaged- project/udisks/blob/master/data/org.freedesktop.UDisks2.policy.in#L15 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to udisks2 in Ubuntu. https://bugs.launchpad.net/bugs/1836499 Title: Ignores HintSystem (UDISKS_SYSTEM) Status in udisks2 package in Ubuntu: New Bug description: [18.04 amd64] HintSystem (which can be set by a udev rule with ENV{UDISKS_SYSTEM}="1") is supposed to "require additional permissions to access" [0] but there is no difference in the mount permissions when it is set: # UDISKS_SYSTEM=0 $ udisksctl info -b /dev/sr0 /org/freedesktop/UDisks2/block_devices/sr0: org.freedesktop.UDisks2.Block: Configuration: [] CryptoBackingDevice: '/' Device: /dev/sr0 ... HintAuto: true HintIconName: HintIgnore: false HintName: HintPartitionable: false HintSymbolicIconName: HintSystem: false Id: by-uuid-2019-06-22-02-06-15-00 ... UserspaceMountOptions: uhelper=udisks2 org.freedesktop.UDisks2.Filesystem: MountPoints: /media/tj/Xubuntu 19.10 amd64 Size: 0 $ mount | grep media/tj /dev/sr0 on /media/tj/Xubuntu 19.10 amd64 type iso9660 (ro,nosuid,nodev,relatime,nojoliet,check=s,map=n,blocksize=2048,uid=1000,gid=1000,dmode=500,fmode=400,uhelper=udisks2) # UDISKS_SYSTEM=1 $ udisksctl info -b /dev/sr0 /org/freedesktop/UDisks2/block_devices/sr0: org.freedesktop.UDisks2.Block: Configuration: [] CryptoBackingDevice: '/' Device: /dev/sr0 ... HintAuto: true HintIconName: HintIgnore: false HintName: HintPartitionable: false HintSymbolicIconName: HintSystem: true Id: by-uuid-2019-06-22-02-06-15-00 ... UserspaceMountOptions: uhelper=udisks2 org.freedesktop.UDisks2.Filesystem: MountPoints: /media/tj/Xubuntu 19.10 amd64 Size: 0 $ mount | grep media/tj /dev/sr0 on /media/tj/Xubuntu 19.10 amd64 type iso9660 (ro,nosuid,nodev,relatime,nojoliet,check=s,map=n,blocksize=2048,uid=1000,gid=1000,dmode=500,fmode=400,u helper=udisks2) [0] http://storaged.org/doc/udisks2-api/latest/gdbus-org.freedesktop.UDisks2.Block.html#gdbus-property-org-freedesktop-UDisks2-Block.HintSystem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/udisks2/+bug/1836499/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
