[Mageia-discuss] Cannot unmount media as user

Sun Jun 10 13:00:16 CEST 2012

Len Lawrence a écrit :
+> On 10/06/12 10:59, andre999 wrote:
+>> Len Lawrence a écrit :
+>>> Mageia 2 fully updated
+>>> GNOME Classic
+>>>
+>>> This is probably a newbie question....  I am not sure when this 
+>>> started to happen but when, as a user, I try to unmount a USB drive 
+>>> via the desktop icon I am told that I am not authorized to perform 
+>>> that operation.  After browsing bugzilla and the forums it looked 
+>>> like the best way to get past this would be to use sudo.  However, 
+>>> editing the sudoers file always throws up a syntax error.  I have 
+>>> tried various commands based on examples but cannot get any to work.
+>>>
+>>> e.g.
+>>>
+>>> ALL /bin/umount NOPASSWD
+>>> %users /bin/umount NOPASSWD
+>>> %users localhost=/bin/umount NOPASSWD
+>>>
+>>> What is the correct recipe?  RTFM only makes my old brain spin.
+>>>
+>>> Len
+>>>
+>>
+>> try :
+>>
+>> %users ALL=/bin/umount NOPASSWD: ALL
+>>
+>> or maybe :
+>>
+>> %users ALL=/bin/umount device NOPASSWD: ALL
+>>
+>> where "device" is whatever the usb drive is mounted as.
+>> Not workable if "device" is variable.
+>>
+>> Alternately, you could do :
+>> su
+>> (enter password)
+>> umount ...
+>>
+>> As to why you are having the problem :
+>> It means that the drive was mounted with root privileges, or the 
+>> privileges of another user.
+>> Thus it is requiring root privileges (or that of the other user) to 
+>> unmount.
+>>
+>> Was it plugged it when the system was booted ? That could cause it to 
+>> have root privileges.
+>> Is it in a line the /etc/fstab file ?
+>> (if so, you just have to add the option "users" in the 
+>> comma-separated list in the third position in the line.)
+>>
+>> Or it could be a bug.
+>>
+> A bug seems doubtful because there do not seem to be any other reports 
+> of this behaviour.  I have been forced to take the direct su/password 
+> route.
+>
+> The medium was plugged in at boot time but has been removed and 
+> replugged a few times.  I had not considered that point.  What you are 
+> saying is that removable media are treated as fixed if already plugged 
+> in at boot time?  This is starting to make sense.
+
+It has happened to me in the past, although currently I have no problem 
+with a dvd that I sometimes have inserted on boot.  (I use Gnome as 
+well, but haven't yet updated to mga2.)
+If that is the cause, either something is not configured right or not 
+installed, or it is a bug.
+If you have systemd activated, a configuration problem is not unlikely.
+
+>   Will investigate fstab, edit if necessary and reboot without the 
+> drive .  And if that works, mend sudoers.
+
+For fstab, the "users" option lets any user unmount the drive, even if 
+they didn't mount it.  As well as mount it.  It is a good option to use 
+for removable media.
+>
+> Thanks
+>
+> Len
+>
+>
+
+
+-- 
+André
+
+