[Nix-dev] canon printer drivers (cnijfilter)

Matt McHenry matt at mchenryfamily.org
Sun Jul 2 05:23:22 CEST 2017 

I finally figured it out!  The missing magic was 'dontPatchELF =
true'.  I've seen a CUPS test page come out, and have opened a PR:
https://github.com/NixOS/nixpkgs/pull/27031.  Thanks for renewing my
motivation, Nawal!  :)

On Thu, Jun 22, 2017 at 2:55 AM, Nawal Husnoo <nawal at husnoo.com> wrote:
> Sample code from my attempts might help:
>
> mkdir -p $out/
> cp -r $src/* $out/
>
>
> chmod 777 -R $out/*
>
>
> patchelf --interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
>     --set-rpath $libPath:$out/lib \
>     $out/bin/cnijnpr
>
> ln -sv $out/lib/libcnbpcmcm356.so.8.0.1 $out/lib/libcnbpcmcm356.so
>
> LIBTIFF=$(pkg-config --libs-only-L libtiff-4 | sed -e
> 's/-L//g')/libtiff.so.5
> ln -s $LIBTIFF $out/lib/libtiff.so.4
>
> ldd $out/lib/cups/filter/pstocanonij
>
>
> The latter looks inside the binary and tries to link it (dynamically) - it
> should show what's still missing. The tiff business just makes tiff
> available to the canon driver.
>
>
> The rpath bit in the patchelf command is probably what you're looking for
> initially.
>
> hth
>
> Nawal
>
>
>
>
>
>
>
>
>
> On 22 Jun 2017 03:24, "Matt McHenry" <matt at mchenryfamily.org> wrote:
>>
>> Okay, patchelf seemed promising.  I just pushed
>> https://github.com/jerith666/nixpkgs/commit/237a52ca24026f2e4d8a5543eb7aa98f610f642c
>> to add it to my expression.  However, it doesn't seem to have helped.  :-(
>>
>> Looking at the source code, the "Error: CNCL_SetParam" is coming from
>> ./cnijfilter/src/bjfilter.c line 661.  The CNCL_SetParam() function is not
>> defined in any of the provided source code, though -- rather, it looks like
>> it's in ./328/libs_bin/libcnbpcnclapi328.so.3.3.0.
>>
>> I have a gdb trace laying around from last time I worked on this, and it
>> has this stack trace:
>>
>> Catchpoint 1 (call to syscall open), 0xf7fd8da9 in __kernel_vsyscall ()
>> eax is -38
>> (gdb) where
>> #0  0xf7fd8da9 in __kernel_vsyscall ()
>> #1  0xf7d65f23 in __open_nocancel () from
>> /nix/store/bgmm5m6q04fl5myf831c73l1xmbl38xw-glibc-2.24/lib/libc.so.6
>> #2  0xf7cf9fd6 in __GI__IO_file_open () from
>> /nix/store/bgmm5m6q04fl5myf831c73l1xmbl38xw-glibc-2.24/lib/libc.so.6
>> #3  0xf7cfa1d1 in __GI__IO_file_fopen () from
>> /nix/store/bgmm5m6q04fl5myf831c73l1xmbl38xw-glibc-2.24/lib/libc.so.6
>> #4  0xf7cedd31 in __fopen_internal () from
>> /nix/store/bgmm5m6q04fl5myf831c73l1xmbl38xw-glibc-2.24/lib/libc.so.6
>> #5  0xf7cedd9e in fopen@@GLIBC_2.1 () from
>> /nix/store/bgmm5m6q04fl5myf831c73l1xmbl38xw-glibc-2.24/lib/libc.so.6
>> #6  0xf7fd1b08 in BJVSOpenFile () from
>> /nix/store/9ci3apl3d8spw0zdp202cwr325n8hz28-cnijfilter-2.80/lib/libcnbpcmcm328.so
>> #7  0xf7fcafa3 in CommandComp2Ext_Open () from
>> /nix/store/9ci3apl3d8spw0zdp202cwr325n8hz28-cnijfilter-2.80/lib/libcnbpcmcm328.so
>> #8  0xf7fce059 in CommandComp2 () from
>> /nix/store/9ci3apl3d8spw0zdp202cwr325n8hz28-cnijfilter-2.80/lib/libcnbpcmcm328.so
>> #9  0xf7e60d4d in CNCL_SetParam () from
>> /nix/store/9ci3apl3d8spw0zdp202cwr325n8hz28-cnijfilter-2.80/lib/libcnbpcnclapi328.so
>> #10 0x0804b3c8 in main ()
>>
>> I think this means that it's trying to open some file and failing.  My
>> *guess* is that it's trying to open one of these files, but doesn't have the
>> proper nix store path:
>>
>> $ file
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/*
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cifip3500.conf:
>> ASCII text
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cifip4500.conf:
>> ASCII text
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cifmp140.conf:
>> ASCII text
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cifmp210.conf:
>> ASCII text
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cifmp520.conf:
>> ASCII text
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cifmp610.conf:
>> ASCII text
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnb_3150.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnb_3160.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnb_3190.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnb_3260.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnb_3270.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnb_3280.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnbpname315.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnbpname316.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnbpname319.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnbpname326.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnbpname327.tbl:
>> TrueType font data
>>
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib/cnbpname328.tbl:
>> TrueType font data
>>
>> that's what my
>> https://github.com/jerith666/nixpkgs/commit/446b9230fbde3c71e8a285180614c32cdb2cf051
>> "try using shorter libpath via /var/lib/cups" was trying to remedy, to let
>> these libs be found via:
>>
>> $ ls -l /var/lib/cups/path/lib/bjlib
>> lrwxrwxrwx 1 root root 69 Dec 31  1969 /var/lib/cups/path/lib/bjlib ->
>> /nix/store/g1gdd81qh6dskjalg6icg56yw74rb03b-cnijfilter-2.80/lib/bjlib
>>
>> But, that doesn't seem to have worked ... or, I'm still barking up the
>> wrong tree.
>>
>> Anyway, that's what I've got for tonight ... maybe more tomorrow ... I
>> think the next step is to try to fire up gdb again and see *what* file it's
>> trying to open down inside that call to CNCL_SetParam().
>>
>>
>> On Wed, Jun 21, 2017 at 7:47 AM, Matt McHenry <matt at mchenryfamily.org>
>> wrote:
>>>
>>> The error doesn't show up in the cups log -- the only thing it says is
>>> "Error: CNCL_SetParam" -- but to cups, the process it spawned seems to have
>>> succeeded.  See attached log.
>>>
>>> As I recall, the problem is that one of the executables that gets built
>>> then tries to load one of binary libraries included in the tarball from
>>> canon, and can't find it.  I'll have to go refresh my memory some more, but
>>> won't have time until this evening.
>>>
>>> I have not tried patchelf -- that may be a good lead.
>>>
>>> I don't think a FHS env will work, because as you say, the cups service
>>> can't be run in there.
>>>
>>> On Wed, Jun 21, 2017 at 2:36 AM, Nawal Husnoo <nawal at husnoo.com> wrote:
>>>>
>>>> Thanks for that Matt!
>>>>
>>>> I wonder if the versioning thing is a windows-related behaviour.
>>>>
>>>> Could you say a few words about the link errors you had? Have you used
>>>> patchelf?
>>>>
>>>> > patchelf --interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
>>>> >     --set-rpath $libPath:$out/lib \
>>>> >     $out/bin/cngpijmonmp250
>>>>
>>>> Another option I could live with is if we could create a buildFHSUserEnv
>>>> - I tried it with the binary canon drivers, but it turned out it's cups that
>>>> needs to be inside for the pesky things to be found, but then systemd
>>>> wouldn't let me restart cups.service inside a user env...
>>>>
>>>> Cheers,
>>>>
>>>> Nawal.
>>>>
>>>>
>>>>
>>>> On 21 June 2017 at 01:49, Matt McHenry <matt at mchenryfamily.org> wrote:
>>>>>
>>>>> Hi Nawal,
>>>>>
>>>>> I see you've been trying to get canon's linux drivers working on nixos
>>>>> [1][2][3].  I've also tried my hand at this.  I think I've made more
>>>>> progress than you, but was never able to get it working, and eventually
>>>>> resigned myself to just printing with the gutenprint driver.  I'd be
>>>>> interested in continuing to hack at it as time permits, though.
>>>>>
>>>>> I got to the point of cups executing what I think is the correct chain
>>>>> of filters, all built from the source that my nix expression pulls from the
>>>>> Canon Japan website.  However, at least one of the filters is unable to load
>>>>> at least one dynamically linked library, so it fails.  I don't know much
>>>>> about shared libraries on linux in general or NixOS in particular, so I was
>>>>> mostly just thrashing around a lot.
>>>>>
>>>>> I've pushed what I have to the cnijfilter branch in my nixpkgs clone
>>>>> [4].  To try it, just add pkgs.cnijfilter to services.printing.drivers in
>>>>> configuration.nix.  (I also tried adding cnijfilter to
>>>>> environment.systemPackages, that didn't seem to help.)
>>>>>
>>>>> I've gleaned a lot from the other distros builds [5][6][7].  In
>>>>> particular, the cnijfilter-common library does not follow a normal
>>>>> versioning pattern -- each version supports a certain set of printers.  So
>>>>> you don't want the latest, you want whatever matches up with your printer.
>>>>> (My printer is an MX-700, which uses the mp520 driver.  So I've been working
>>>>> on version 2.80 of cnijfilter-common.)  But my hope is that the overall
>>>>> structure of the build would be very portable between versions.
>>>>>
>>>>> It looks like you've worked from the debian packages -- perhaps looking
>>>>> in more detail at how they are built will give us some more clues?
>>>>>
>>>>> I'm not sure whether it makes more sense to open an issue to document
>>>>> this work, or keep discussing on the mailing list.
>>>>>
>>>>> [1]
>>>>> https://mailman.science.uu.nl/pipermail/nix-dev/2017-June/023942.html
>>>>> [2]
>>>>> https://mailman.science.uu.nl/pipermail/nix-dev/2017-June/023943.html
>>>>> [3]
>>>>> https://mailman.science.uu.nl/pipermail/nix-dev/2017-June/023946.html
>>>>>
>>>>> [4] https://github.com/jerith666/nixpkgs/tree/cnijfilter
>>>>>
>>>>> [5] https://bugs.gentoo.org/show_bug.cgi?id=130645
>>>>> [6] https://aur.archlinux.org/packages/cnijfilter-mp620/?comments=all
>>>>> [7] https://github.com/spremi/cnijfilter-source-3.80
>>>>
>>>>
>>>
>>
>

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