Hi all, I am using CentOS 5 operating system. and trying to use a usb thermal printer. This Printer works well if I log in as a root user, but I want to use it in non-root user mode. I have put this non root user in lp group also. But No Success. My printer uses usb port listed under /proc/bus/usb/bus-no/dev-no directory tree. I want to set permission on it. [when I do it manually the printer starts working, but I don't want to do this in such way.] I need some automated way. Also I found some techniques to set rules and permissions on usb port. but those techniques set the permission for /dev/bus/usb/bus-no/dev-no. and are of no use for me. Please suggest me some good way to do so.
i had similar problem. fedora core 4. hp 1120 mfp. sane works only with root permissions. i used two files from packet iscan. first file /etc/hotplug/iscan-device , permissions = 755, root, root Code: ================ #!/bin/sh DEFAULT_OWNER=root DEFAULT_GROUP=root DEFAULT_PERMS=0666 USB_SCRIPTS="libusbscanner usbscanner desktopdev " for script in $USB_SCRIPTS; do if [ -x $HOTPLUG_DIR/$TYPE/$script ]; then exec $HOTPLUG_DIR/$TYPE/$script fi done # Activate fallback settings # if [ "$ACTION" == add -a "$TYPE" == "usb" ]; then chown $DEFAULT_OWNER:$DEFAULT_GROUP "$DEVICE" chmod $DEFAULT_PERMS "$DEVICE" fi ======================= second file /etc/hotplug/iscan.usermap , permissions = 644, root, root Code: ========================= # Hewlett-Packard | HP LaserJet M1120 MFP iscan-device 0x0003 0x03f0 0x5617 0x0000 0x0000 0x00 0x00 0x00 0x00 0x00 0x00 0x00000000 =================================== in the second file actually important and individual for you is 0x03f0= Vendor_Id and 0x5617=Device_Id. change it for yours. how determine? # sane-find-scanner what it does to me. it sets automatically permissions=666 to file /proc/bus/usb/bus-no/dev-no - this file concern my scanner when scanner plugged. and as i have permissions 666 then i can run $xsane as user. hope this help.