Difference between revisions of "Scanner Server"
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With the scanner plugged in, run the lsusb command. You'll get several lines like this: | With the scanner plugged in, run the lsusb command. You'll get several lines like this: | ||
| − | Bus | + | Bus 002 Device 003: ID 03f0:5d11 Hewlett-Packard Photosmart C5200 series |
| − | Look for the one that looks like it's for your scanner, and write down the two numbers next to ID (in this case | + | Look for the one that looks like it's for your scanner or printer (if the scanner is built in, as is the case above for the all-in-one printer+scanner from HP), and write down the two numbers next to ID (in this case 03f0 and 5d11). The left number is the vendor ID, and the right is the product ID. Another option is to look here: http://www.linux-usb.org/usb.ids for your manufacturer and product. |
AS ROOT, create a file called 15-scanner.rules in the /etc/udev/rules.d/ directory that contains exactly one line: | AS ROOT, create a file called 15-scanner.rules in the /etc/udev/rules.d/ directory that contains exactly one line: | ||
Revision as of 17:50, 31 August 2009
This page is about making Amahi run as a Scanner Server.
Due to the variety of scanners available in the market (standalone, as part of a printer or fax or multifunction systems), some may experience trouble with permissions.
Preventing permissions issues
We want to make the scanner RW for a scanner group, that Apache is a member of and has access to. To do this, start by making a new group:
su - groupadd -r scanner
Add apache and root to the new group:
usermod -a -G scanner apache usermod -a -G scanner root
Next, we need to tell the system to set the scanner permissions so it uses the new group.
To do that, we need to know how to identify the scanner. I'm assuming you have a USB scanner; if not, the process is similar, but I'm not sure how to identify the scanner correctly.
With the scanner plugged in, run the lsusb command. You'll get several lines like this:
Bus 002 Device 003: ID 03f0:5d11 Hewlett-Packard Photosmart C5200 series
Look for the one that looks like it's for your scanner or printer (if the scanner is built in, as is the case above for the all-in-one printer+scanner from HP), and write down the two numbers next to ID (in this case 03f0 and 5d11). The left number is the vendor ID, and the right is the product ID. Another option is to look here: http://www.linux-usb.org/usb.ids for your manufacturer and product.
AS ROOT, create a file called 15-scanner.rules in the /etc/udev/rules.d/ directory that contains exactly one line:
SUBSYSTEM=="usb", ATTR{idVendor}=="<left number from lsusb>", ATTR{idProduct}=="<right number from lsusb>", ACTION=="add",NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", GROUP="scanner",OPTIONS+="last_rule"
This tells the system "If this SPECIFIC USB device is plugged in, make it part of the scanner group with the default permissions (RW by owner and group), and stop processing rules.
Save the file, then:
- restart the httpd service to pick up the group permissions, via Apps -> Servers or by hand as root with:
service httpd restart
- unplug and replug your scanner to pick up the settings
That should be it.
