replace scanner-access-enabler with simple instruction for UDEV-Rule

[andi-blafasl]

I have managed to enable access to my scanner by a simple UDEV-Rule.

Create the file 90-scanner.rules in /etc/udev/rules.d/ and the follow content

--8<---8<---8<---8<---

change device file permission to group scanner for sane access

ATTRS{idVendor}=="04a9", ATTRS{idProduct}=="220d", SUBSYSTEMS=="usb", ACTION=="add", MODE="0664", GROUP="scanner"

--8<---8<---8<---8<---

Replace the Vendor-ID and Product-ID with your IDs from LSUSB output. Now, every time you connect your scanner the device node will be set to RW-RW-R-- rights with owner ROOT and group SCANNER. You can add all your users who should be able to scan to the scanner group.

Works great on Debian Wheezy on my Rasperry Pi and should be update safe and would not open any big security hole.

If you google for udev-Rules for scanner access some people suggest to change the default rule for every usb-device to be in mode 666 and redo the change after every update to the udev packet facepalm

[GM-Script-Writer-62850]

if i recall the IDs can change nice find though, i will look into this, there are bigger fish to fry atm edit: 6 hours later, fish fryed, but it is late now

[GM-Script-Writer-62850]

This seems to work quite nicely :)

chad@M4A79XTD-EVO:~$ scanimage -f "%d%n"
plustek:libusb:003:004
hpaio:/usb/Deskjet_F4400_series?serial=CN05DC61TP05C5
chad@M4A79XTD-EVO:~$ lsusb -s 003:004
Bus 003 Device 004: ID 1606:0060 Umax Astra 3400/3450
chad@M4A79XTD-EVO:~$ cat /etc/udev/rules.d/40-scanner.rules
SUBSYSTEMS=="usb", ATTRS{idVendor}=="1606", ATTRS{idProduct}=="0060", ENV{libsane_matched}="yes", GROUP="www-data"

Edit: Made a bash script for making the rules, it could use testing

#!/bin/bash
rule="/etc/udev/rules.d/40-scanner.rules"

if [ "$USER" != "root" ];then
    echo "You are not root, you need to be root for this to work."
    exit
fi
md5=$(date +%s:%N | md5sum)
md5=${md5:0:32}
scanners=$(scanimage -f "%d%n" | grep 'libusb:')
for val in $scanners;do
    usb=$(echo $val | sed -n "s/.*libusb:\([0-9]*\):\([0-9]*\)/\1:\2/p")
    lsusb -s "$usb" | sed "s/.*ID \([0-9]*\):\([0-9]*\).*/SUBSYSTEMS==\"usb\", ATTRS{idVendor}==\"\1\", ATTRS{idProduct}==\"\2\", ENV{libsane_matched}=\"yes\", MODE:=\"666\"/" >> /tmp/$md5
    chmod 666 /dev/bus/usb/$(echo "$usb" | sed 's/:/\//')
done
if [ -f /tmp/$md5 ];then
    if [ -f $rule ];then
        sumA=$(md5sum /tmp/$md5)
        sumA=${sum:0:32}
        sumB=$(md5sum $rule)
        sumB=${sum:0:32}
        if [ "$sumA" == "$sumB" ];then
            echo "Good to go"
        else
            echo "You have rules, but something is different"
            echo -e "  \e[1;34m$rule\e[0m has:"
            echo -e "\t\e[1;32m#---START-OF-FILE---\e[0m"
            cat -n $rule
            echo -e "\t\e[1;31m#----END-OF-FILE----\e[0m"
            echo "These are the new rules:"
            echo -e "\t\e[1;32m#---START-OF-FILE---\e[0m"
            cat -n /tmp/$md5
            echo -e "\t\e[1;31m#----END-OF-FILE----\e[0m"
            echo -e "No action taken, you can edit \e[1;34m$rule\e[0m as you see fit"
        fi
    else
        cp /tmp/$md5 $rule
    fi
fi
rm /tmp/$md5
exit

[GM-Script-Writer-62850]

Completed, See Downloads made a new installer for it EDIT: Next version will make rules like this SUBSYSTEMS=="usb", ATTRS{idVendor}=="1606", ATTRS{idProduct}=="0060", ENV{libsane_matched}="yes", GROUP="lp" That way the permissions are the same a a HP scanner which works out of the box with the PHP Scanner Server EDIT: Actually it will check if the lp group exist and and if it does not it will use scanner and if scanner does not exist it will mode it to 666

[andi-blafasl]

Nice one! Works great.

[GM-Script-Writer-62850]

Did the easy installer work on Debian Wheezy on the pi? or did you do the manual install

[rubber-ant]

here my guide in Italian version : http://wiki.ubuntu-it.org/Server/PhpScannerServer

[andi-blafasl]

I did the manual installation not your easy installer, sorry.

[GM-Script-Writer-62850]

Nice work, i do encourage people to use the manual install, you learn more that way

Did you run into any issues while following the instructions in step 3 i no longer use tesseract-ocr-* there are lots more of them than there were are 1st release and i made it auto detect languages you may want to include tesseract-ocr-ita tesseract-ocr-ita-old though, cause they are the Italian languages files for tesseract

You have a typo here sudo chown-R www-data /v should be sudo chown -R www-data /v there is a space after chown

You can get a URL for the scanner by running http://$(uname -n).local but i don't think that URL works on a Windows XP system

[GM-Script-Writer-62850]

Led to discovery an solution of issue #13