inotifydev-sd-device (Source) 

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#!/bin/bash
##---------------------------------------------------------------------------##
#
#   Script:  inotifydev-sd-device
#   Author:  Brian <genius@groupbcl.ca> :)
#   Date:    September 2017
#
#   USB drive handler for inotifydev.
#
#   When mounting a drive, this script attempts to assign the device and
#   the mount point to a logged in user. It determines the user by listing
#   all non-root processes, determining their owners, then searching the
#   'passwd' for file users that don't have 'nologin' as their login shell.
#
##---------------------------------------------------------------------------##
#   BUUS: This script is part of Brian's Useful Utilities Set
##---------------------------------------------------------------------------##

function on_create {
    # Search for an active user that isn't root by listing non-root processess
    # and searching the process owners for a user that can log in
    EGREP_LIST=''
    for U in $(ps -ef | grep -v -e ^UID -e ^root | cut -f 1 -d' ' | sort -u)
    do
        [ "$EGREP_LIST" ] && EGREP_LIST="$EGREP_LIST|"
        EGREP_LIST="${EGREP_LIST}${U}"
    done
    MOUNT_USER="$(egrep "^($EGREP_LIST):" /etc/passwd | grep -v nologin |
        head -n 1 | cut -f1 -d:)"
    MOUNT_OPTS=''
    if [ "$MOUNT_USER" ]
    then
        MOUNT_OPTS="uid=$MOUNT_USER,gid=$MOUNT_USER"
        ps -ef | grep -v grep | grep -q udisksd &&
            MOUNT_OPTS="${MOUNT_OPTS},uhelper=udisks2"
    fi

    # Get information for the device such as PTTN, LABEL, TYPE, UUID
    LINE="$(blkid /dev/$DEVICE)"
    eval "$(echo "$LINE" | sed 's,\(/dev/sd[a-z][0-9]*\+\):,PTTN=\1,')"

    # If the partiion has a LABEL, see if it's mounted already
    if [ "$LABEL" ]
    then
        PTTN_RE="${PTTN//\//\\/}"
        MOUNT_PT="$(mount | awk "{
            if (match(\$0, /^$PTTN_RE on (.*) type [[:alnum:]]+ \\(/, a))
            { print a[1] }
        }")"
        [ "$MOUNT_PT" ] && echo "$PTTN is already mounted on $MOUNT_PT"
    else
        echo "Partition /dev/$DEVICE does not have a file system label"
    fi

    # If there is a LABEL and no mount point, attempt to mount the device
    if [ "$LABEL" -a ! "$MOUNT_PT" ]
    then
        [ "$MOUNT_USER" ] && chown $MOUNT_USER $PTTN
        MOUNT_PT="/tmp/${DEVICE} ${LABEL}"  # Set mount point to "/tmp/sdX_LABEL"
        [ -d "$MOUNT_PT" ] || mkdir "$MOUNT_PT"
        echo $TYPE | egrep -q '(fat|ntfs)' && MOUNT_OPTS="$MOUNT_OPTS,dmask=022,fmask=113"
        MOUNT_OPTS="$MOUNT_OPTS,defaults"
        echo "Attempting to mount $PTTN on '$MOUNT_PT', type $TYPE"
        echo "Mount options: $MOUNT_OPTS"
        mount -t $TYPE -o $MOUNT_OPTS $PTTN "$MOUNT_PT"
        #[ $? == 0 ] && ls "$MOUNT_PT" | sed "s,^,- $MOUNT_PT/,"
    fi
}

function on_delete {
    ls -d /tmp/${DEVICE}* &>/dev/null
    [ $? == 0 ] || return
    ls -d /tmp/${DEVICE}* | while read MOUNT_PT
    do
        echo "Removing mount point '$MOUNT_PT'"
        if [ $(ls "$MOUNT_PT" | wc -l) -gt 0 ]
        then
            echo "(Attempting to force unmount disconnected device)"
            umount -f "$MOUNT_PT"
        fi
        rmdir "$MOUNT_PT"
    done
}

FUNCTION=$1
DEVICE=$2
case $1 in
    CREATE) on_create;;
    DELETE) on_delete;;
esac

# vim: tabstop=4