Mounting USB Drives

[Dave Basener]

I posted a script which used kdialog to provide a GUI mount and umount 
of USB Drives.  I noted that the script had a small bug.  I have found 
and corrected the bug which was:
  If the drive was busy and the script tried to umount it, it failed 
(correct) and gave no notification (incorrect).

I have found and corrected that error and, in the case that anyone wants 
to use this, I am posting the corrected script.  (Mailers may add 
unwanted line-feeds, so I have also attached a copy which would be 
unaffected by that.)

=============

#!/bin/bash
#
#
# Requirements:
# -  WM:  Definitely works with KDE, I think it will work with just
#    about any X Window Manager, but I am not sure.
#
# -  The script assumes the mount point is /mnt/stick.  Change the
#    MOUNTPOINT definition if you use a different one.
#
# -  Requires that the fstab have a line like this:
#   /dev/sda1    /mnt/stick    vfat    user,noauto,umask=0    0    0
#
#   - /dev/sda1 might be variable, but on all 3 of my systems that is
#     the device
#
#   - /mnt/stick - this is entirely up to you, but this must match
#     MOUNTPOINT in the script
#
#   -  the mount options must include "user" and should contain "noauto"
#
# -  bash is /usr/bash.  If yours is different, change the first line
#    of the script to reflect this
#
#
# Description:
#    This is a toggle of the mount state of a USB Memory device.  It
#    uses kdialog as a GUI.
#
# Author:  Dave Basener
#          dbasener at aurora.edu
#          Aurora University
#
# Date:  2004-Oct-8
#
# Yours to copy, use, distribute.  Please keep the author information
# intact.  Thank you
#

MOUNTPOINT=/mnt/stick

MNTSTATFILE=/tmp/mnt.stat
UMNTSTATFILE=/tmp/umnt.stat

# create and clear the status files
 >$MNTSTATFILE
 >$UMNTSTATFILE

# try a mount
mount $MOUNTPOINT >$MNTSTATFILE 2>&1
mountResp=$?

# If the mount returns a 32, most probable cause is that the drive
# is already mounted or the drive isn't present, so ...
if [[ $mountResp == 32 ]]
then

    # ... try a umount
    umount $MOUNTPOINT >$UMNTSTATFILE 2>&1
    umountResp=$?
   
    # if neither worked ...
    if [[ $umountResp != 0 ]]
    then
        # indicate the error and get out
        kdialog --error "Could not mount nor unmount the memory 
stick\n$(cat $MNTSTATFILE)\n$(cat $UMNTSTATFILE)\n"
        exit 32

    # else, if the umount worked ...
    elif [[ $umountResp == 0 ]]
    then
        # give the all-clear
        kdialog --msgbox "Memory unmounted - OK to remove"
    fi

# else, if the original mount worked ...
elif [[ $mountResp == 0 ]]
then
    # then, it's mounted, but did it mount properly
    if [[ -s "$MNTSTATFILE" ]]
    then
        # there is a message in the stat file - ask what to do
        kdialog --warningyesno "Device mounted, but mount 
returned:\n$(cat $MNTSTATFILE)\n\nUnmount device?"
   
        diaResp=$?
   
        # if unmount requested, simply recurse
        [[ $diaResp -eq 0 ]] && mountStick
    else
        # It mounted properly - give ACK
        kdialog --msgbox "USB Memory mounted - "
    fi
else
    # some unresolved mount or unmount failure
    kdialog --error "Could not mount the memory stick - recognized error 
code: $mountResp\n$(cat $MNTSTATFILE)"
fi

========================


-- 
"... be the change you wish to see in the world."  - Gandhi

David Basener               http://www.aurora.edu/~dbasener
System Administrator                Dave.Basener at aurora.edu
Aurora University                              630 844 4889

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