Arch Linux

more10

Member

Registered: 2012-06-13

Posts: 10

Cannot umount usb device as user

I have managed to mount usb memory automatically by adding two files to udev.rules:

[root@archdev rules.d]# pwd
/etc/udev/rules.d
[root@archdev rules.d]# ls
11-media-by-label-auto-mount.rules  11-sd-cards-auto-mount.rules

I got them from my arch linux arm installation, from package udev-automount.

This is what they look like:

[root@archdev rules.d]# cat 11-media-by-label-auto-mount.rules 
KERNEL!="sd[a-z][0-9]", GOTO="media_by_label_auto_mount_end"
PROGRAM="/usr/bin/grep -q ' %M:%m /[^ ]* /' /proc/self/mountinfo", PROGRAM!="/usr/bin/grep -q ' %M:%m / /media/' /proc/self/mountinfo", GOTO="media_by_label_auto_mount_end"

# Import FS infos
IMPORT{program}="/sbin/blkid -o udev -p %N"

# Get a label if present, otherwise specify one
ENV{ID_FS_LABEL}!="", ENV{dir_name}="%E{ID_FS_LABEL}"
ENV{ID_FS_LABEL}=="", ENV{dir_name}="hd-%k"

# Global mount options
ACTION=="add", ENV{mount_options}="noatime"
# Filesystem-specific mount options
ACTION=="add", ENV{ID_FS_TYPE}=="vfat|ntfs", ENV{mount_options}="$env{mount_options},utf8,gid=100,umask=002"

# Mount the device
ACTION=="add", RUN+="/bin/mkdir -p /media/%E{dir_name}", RUN+="/bin/mount -o $env{mount_options} /dev/%k /media/%E{dir_name}"

# Clean up after removal
ACTION=="remove", ENV{dir_name}!="", RUN+="/bin/umount -l /media/%E{dir_name}", RUN+="/bin/rmdir /media/%E{dir_name}"

# Exit
LABEL="media_by_label_auto_mount_end"

root@archdev rules.d]# cat 11-sd-cards-auto-mount.rules 
KERNEL!="mmcblk[0-9]p[0-9]", GOTO="sd_cards_auto_mount_end"
PROGRAM="/usr/bin/grep -q ' %M:%m /[^ ]* /' /proc/self/mountinfo", PROGRAM!="/usr/bin/grep -q ' %M:%m / /media/' /proc/self/mountinfo", GOTO="sd_cards_auto_mount_end"

# Global mount options
ACTION=="add", ENV{mount_options}="relatime"
# Filesystem specific options
ACTION=="add", IMPORT{program}="/sbin/blkid -o udev -p %N"
ACTION=="add", ENV{ID_FS_TYPE}=="vfat|ntfs", ENV{mount_options}="$env{mount_options},utf8,gid=100,umask=002"

ACTION=="add", RUN+="/bin/mkdir -p /media/sd-%k", RUN+="/bin/ln -s /media/sd-%k /mnt/sd-%k", RUN+="/bin/mount -o $env{mount_options} /dev/%k /media/sd-%k"
ACTION=="remove", RUN+="/bin/umount -l /media/sd-%k", RUN+="/bin/rmdir /media/sd-%k"
LABEL="sd_cards_auto_mount_end"

I believe that the usb device is mounted by 11-media-by-label-auto-mount.rules.

The mounted usb stick:

[root@archdev rules.d]# mount | grep sdb1
/dev/sdb1 on /media/STORE_N_GO type vfat (rw,noatime,gid=100,fmask=0002,dmask=0002,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro)

Properties of the device:

[root@archdev rules.d]# ls -al /dev/sdb1 
brw-rw---- 1 root disk 8, 17  7 sep 12.26 /dev/sdb1

Properties of the mounted device:

[root@archdev rules.d]# ls -al  /media/STORE_N_GO/
totalt 20
drwxrwxr-x 3 root users 8192  1 jan  1970 .
drwxr-xr-x 3 root root  4096  7 sep 12.26 ..
drwxrwxr-x 2 root users 8192  6 sep 17.29 katalog

My groups:

[more10@archdev ~]$ groups
root bin daemon adm disk lp wheel games video audio optical storage scanner power users sudo

I cannot unmount the usb stick:

[more10@archdev ~]$ umount /media/STORE_N_GO
umount: /media/STORE_N_GO: umount failed: Operationen inte tillåten

There is nothing regarding mount/umount in /var/log.

What do I need to do in order to get umount to work as user?

ximun

Member

From: Montreal, QC

Registered: 2012-08-14

Posts: 26

Re: Cannot umount usb device as user

Have you seen this thread? https://bbs.archlinux.org/viewtopic.php?pid=725983

I see from this post that you removed ck-launch-session from your .xinitrc file. Can you put it back and see if it solves your problem? Otherwise I think tweaking your /etc/fstab file might do the trick as far as mounting/unmounting as regular user goes.

More reading:
https://wiki.archlinux.org/index.php/Fstab
https://wiki.archlinux.org/index.php/US … with_fstab

N.b. I'm not an experienced user by any means, you might want to wait for veteran archers to pitch in.

---

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more10

Member

Registered: 2012-06-13

Posts: 10

Re: Cannot umount usb device as user

Thanks for your help ximun.

I believe that ck-launch-session was executed twice, thats why I removed it from .xinitrc.

I did try to unmount through Pcmanfm, it says "Authentication is required to unmount /dev/sdb1 mounted by another user". This seems to be a logical explanation since udev mounts it as root.

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: Cannot umount usb device as user

I used to use similar rules, but with pmount instead of mount - that allowed me to use pumount as user for unmounting.

These days, I use udiskie for this, and I would recommend it, unless you have some objection to using udisks.