Difference between revisions of "USB Printing in VE"
Line 64: | Line 64: | ||
* You should be able to see the printer attached to the usb port | * You should be able to see the printer attached to the usb port | ||
+ | == Sample bash shell script for compute vzctl command for dynamically assigning some devices to one VZ == | ||
+ | Be care, the command <code>vzctl set xxx --devices "dddd" --devnodes "nnnn" --save</code> will reassign | ||
+ | the entire list of devices shared to one VZ, even suppressing some already presents. | ||
+ | <code> | ||
+ | #!/bin/bash | ||
+ | VZ=1234 | ||
+ | DEVICES="[bB]luetooth|[pP]rinter" | ||
+ | |||
+ | VZDEV="" | ||
+ | VZNOD="" | ||
+ | |||
+ | while read A B C D E;do | ||
+ | if [[ "$E" =~ (${DEVICES}) ]] ;then | ||
+ | BUS=${B#0} DEV=${D%:} | ||
+ | BUS=${B#0} DEV=${DEV#0} | ||
+ | DEV=${DEV#0} | ||
+ | VZDEV="$VZDEV c:189:$(((BUS-1)*128+DEV-1)):rw" | ||
+ | VZNOD="$VZNOD bus/usb/$B/${D}rw" | ||
+ | fi | ||
+ | done < <(lsusb) | ||
+ | |||
+ | printf "DEVICES=\"%s\"\n" "${VZDEV# }" | ||
+ | printf "DEVNODES=\"%s\"\n" "${VZNOD# }" | ||
+ | printf "vzctl set %d --devices '%s' --devnodes '%s' --save\n" $VZ "${VZDEV# }" "${VZNOD# }" | ||
+ | </code> | ||
[[Category:HOWTO]] | [[Category:HOWTO]] |
Latest revision as of 16:51, 17 April 2012
This howto tries to cover the "device" configuration for printing with a USB printer in a Container. Please refer to your specific distro for required printing packages. Please note that ownership/permission/devices are referred to my system and you have to adapt to YOUR configuration: they are reported only as an EXAMPLE.
- Install usbutils in both HN and VE.
- In a shell on HN type lsusb and you'll get the list fo the usb devices on your system:
Bus 002 Device 006: ID 0dda:2026 Integrated Circuit Solution, Inc. USB2.0 Card Reader Bus 002 Device 005: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB Bus 002 Device 003: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB Bus 002 Device 001: ID 1d6b:0002 Bus 008 Device 005: ID 04b8:0005 Seiko Epson Corp. Stylus Printer Bus 008 Device 001: ID 1d6b:0001 Bus 007 Device 002: ID 046d:c044 Logitech, Inc. Bus 007 Device 001: ID 1d6b:0001 Bus 006 Device 002: ID 051d:0002 American Power Conversion Uninterruptible Power Supply Bus 006 Device 001: ID 1d6b:0001 Bus 001 Device 001: ID 1d6b:0002 Bus 005 Device 001: ID 1d6b:0001 Bus 004 Device 001: ID 1d6b:0001 Bus 003 Device 001: ID 1d6b:0001
- Now examine the output of your command and you'll see two important lines: one for your printer and one for the usb port at which is attached, in my case:
Bus 008 Device 005: ID 04b8:0005 Seiko Epson Corp. Stylus Printer Bus 008 Device 001: ID 1d6b:0001
- In /dev directory in HN you should have:
- a symlink to your usb printer:
lrwxrwxrwx 1 root root 7 Nov 28 14:14 usblp0 -> usb/lp0
- a usb directory
- a printer inside the /dev/usb directory:
crw-rw---- 1 root lp 180, 0 Nov 28 14:14 lp0
- a bus/usb directory
- many directories in bus/usb: named with the bus number that you got with the first lsusb command. In this example the relevant one is 008
- in the numbered subdirectory 1 file for every usb device attached to this bus, the first one is the usb port:
crw-rw-r-- 1 root usb 189, 896 Nov 24 16:16 001
crw-rw-r-- 1 root usb 189, 900 Nov 28 14:14 005
- a symlink to your usb printer:
- Now that you have an idea of the general structure of your usb devices you have to replicate them on your VE.
- enter your VE:
vzctl enter VE_NUMBER
- create in /dev (if not present) the usb directory
- create in /dev/usb the printer device typing:
mknod lp0 c 180 0
- give the correct ownership/permission to the new created device typing:
chown root:lp lp0
chmod 660 lp0
- check with
ls -l lp0
if the new device is IDENTICAL to the one in HN -->crw-rw---- 1 root lp 180, 0 Nov 27 13:51 lp0
- give the correct ownership/permission to the new created device typing:
- go back to /dev and create a symlink to the printer device:
ln -s /dev/usb/lp0 /dev/usblp0
- create all the needed directories:
mkdir /dev/bus
mkdir /dev/bus/usb
mkdir /dev/bus/usb/008
- switch to /dev/bus/usb/008 directory and create there the needed devices: one for the usb port and one for the printer
mknod 001 c 189 896
mknod 005 c 189 900
- assign ownership/permissions:
chown root:usb *
chmod 664 *
- check everything:
ls -l
should give the same results as in HN: crw-rw-r-- 1 root usb 189, 896 Nov 27 13:29 001
crw-rw-r-- 1 root usb 189, 900 Nov 27 13:30 005
- enter your VE:
- Doublecheck everything!
- Now edit your VE_NUMBER.conf adding this line:
DEVICES="c:180:0:rw c:189:896:rw c:189:900:rw"
- These are the devices replicated in the VE with mknod.
- Almost there: restart your VE and enter it.
- In VE type:
lsusb
and you should see the two devices created before:
Bus 008 Device 005: ID 04b8:0005 Seiko Epson Corp. Stylus Printer Bus 008 Device 001: ID 1d6b:0001
- If not RECHECK everything.
- Start cups and access it via your browser
- You should be able to see the printer attached to the usb port
Sample bash shell script for compute vzctl command for dynamically assigning some devices to one VZ[edit]
Be care, the command vzctl set xxx --devices "dddd" --devnodes "nnnn" --save
will reassign
the entire list of devices shared to one VZ, even suppressing some already presents.
#!/bin/bash
VZ=1234
DEVICES="[bB]luetooth|[pP]rinter"
VZDEV=""
VZNOD=""
while read A B C D E;do
if [[ "$E" =~ (${DEVICES}) ]] ;then
BUS=${B#0} DEV=${D%:}
BUS=${B#0} DEV=${DEV#0}
DEV=${DEV#0}
VZDEV="$VZDEV c:189:$(((BUS-1)*128+DEV-1)):rw"
VZNOD="$VZNOD bus/usb/$B/${D}rw"
fi
done < <(lsusb)
printf "DEVICES=\"%s\"\n" "${VZDEV# }"
printf "DEVNODES=\"%s\"\n" "${VZNOD# }"
printf "vzctl set %d --devices '%s' --devnodes '%s' --save\n" $VZ "${VZDEV# }" "${VZNOD# }"