pumount - Online in the Cloud

PROGRAM:

NAME

pumount - umount arbitrary hotpluggable devices as normal user

SYNOPSIS

pumount [ options ] device

DESCRIPTION

pumount is a wrapper around the standard umount program which permits normal users to
umount removable devices without a matching /etc/fstab entry.

pumount also supports encrypted devices which use dm-crypt and have LUKS metadata. If a
LUKS-capable cryptsetup is installed, pumount will umount the mapped device instead and
call cryptsetup to close the decrypted device afterwards.

pumount expects the device as its only argument. This will umount device from a directory
below /media if policy is met (see below).

Please note that, as with pmount, you can use labels and uuids as described in fstab (5)
for devices present in /etc/fstab. In this case, the device name need to match exactly
the corresponding entry in /etc/fstab, including the LABEL= or UUID= part.

Important note for Debian: The permission to execute pumount is restricted to members of
the system group plugdev. Please add all desktop users who shall be able to use pmount to
this group by executing

adduser user plugdev

(as root).

OPTIONS

-l, --lazy
Lazy unmount. Detach the filesystem from the filesystem hierarchy now, and cleanup
all references to the filesystem as soon as it is not busy anymore. (Requires
kernel 2.4.11 or later.) IMPORTANT NOTES This option should not be used unless you
really know what you are doing, as chances are high that it will result in data
loss on the removable drive. Please run pumount manually and wait until it
finishes. In addition, pumount will not luksClose a device which was unmounted
lazily.

--luks-force
Normally, pumount will not luksClose (see cryptsetup(1)) a device pmount did not
open. However, you can bypass this restriction with this flag. You probably will
need it if you did mess around with the /var/lock/pmount_luks directory.

-h, --help
Print a help message and exit successfully.

-d, --debug
Enable verbose debug messages.

--version
Print the current version number and exit successfully.

POLICY

The umount will succeed if all of the following conditions are met:

· device is a block device in /dev/ (it does not need to exist if -l is supplied)

· device is not in /etc/fstab (if it is, pmount executes umount device as the calling
user to handle this transparently)

· device is mounted according to /etc/mtab and /proc/mounts with the calling user's uid

· mount point is in /media

PUMOUNT AND MISSING DEVICES

pumount now supports unmounting devices that have gone missing for some reason, such as a
brutal removal of the device, or a kernel/hardware problem. Just specify the mount point
as argument for pumount.

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