Canon provides source code for cups driver, but with some proprietary binary libs.
This libs available only for x86. No way for direct compiling cnijfilter for ARM (and other architectures).
But we have qemu! We can transparently run x86 executables on any other host architectures.
Easy steps to run cnijfilter on ARM (or any other arch):
- Build https://github.com/endlessm/cnijfilter-common for x86
- Copy all needed x86 libs using recursive ldd. And copy it to /usr/lib/bjlib/
- Patch all executables: set interpreter to /usr/lib/bjlib/x86/ld-linux.so.2 and rpath to /usr/lib/bjlib/
- Install these patched packages to ARM system
- Install qemu-user and qemu-user-binfmt (or qemu-arm-static)
You do not need to do this manually. I have implemented an automated build system: https://github.com/Azq2/cnijfilter-arm-build
All you need is any x86 machine to do the build.
How to use
1. On any x86 machine:
# Install dependencies
sudo apt install debootstrap git util-linux
# Get build system
git clone https://github.com/Azq2/cnijfilter-arm-build
# Start building
cd cnijfilter-arm-build
sudo ./build.sh build
# Get .deb packages
ls -lah ./result/full
ls -lah ./result/light
After build we have two variants of packages: full and light
Item
Full
Light
PPD files
+
+
CUPS filters
+
+
CUPS backends
+
-
lgmon
+
-
canon-maintenance
+
-
cngpij
+
-
cngpijmnt
+
-
cnijlgmon2
+
-
cnijnetprn
+
-
cnijnpr
+
-
docs
+
-
In most cases, a light package is completely sufficient:
- We don't need canon usb backend, because cups have builtin USB support
- We don't need canon network backend, because cups have builtin BJNP support (package cups-backend-bjnp)
- Other canon maintenance utils are useless (in my opinion)
2. Copy .deb from result/light or result/full to your ARM machine.
3. On your ARM machine:
# Install dependencies
sudo apt install qemu-user qemu-user-binfmt # or sudo apt install qemu-user-static
# Install common for all printers package
sudo dpkg -i cnijfilter-common.deb
# Install printer-specific package
# Choose right package for your printer! e400series only for reference!
sudo dpkg -i cnijfilter-e400series.deb
4. Done. You can now configure CUPS.
Security with apparmor (optional)
CUPS filters don't need any specific permissions.
Create file /etc/apparmor.d/cnijfilter-filters with contents:
#include <tunables/global>
/usr/bin/bjfilter* {
#include <abstractions/base>
@{PROC}/sys/vm/mmap_min_addr r,
}
/usr/bin/cif[a-z]*[0-9d]* {
#include <abstractions/base>
@{PROC}/sys/vm/mmap_min_addr r,
}
/usr/lib/cups/filter/{cmdtocanonij,pstocanonbj,pstocanonij} {
#include <abstractions/base>
@{PROC}/sys/vm/mmap_min_addr r,
}
Then restart apparmor:
sudo systemctl reload apparmor
sudo aa-enforce cnijfilter-filters
Note: this minimal file full coverage all executables in light package. For full package you need write additional rules by yourself.
