[Nix-dev] canon printer drivers (cnijfilter)

[Matt McHenry]

Okay, patchelf seemed promising.  I just pushed
https://github.com/jerith666/nixpkgs/commit/237a52ca24026f2e4d8a5543eb7aa9
8f610f642c 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/
<https://github.com/jerith666/nixpkgs/commit/446b9230fbde3c71e8a285180614c32cdb2cf051>
nixpkgs/commit/
<https://github.com/jerith666/nixpkgs/commit/446b9230fbde3c71e8a285180614c32cdb2cf051>
446b9230fbde3c71e8a285180614c32cdb2cf051
<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/02
>>> 3942.html
>>> [2] https://mailman.science.uu.nl/pipermail/nix-dev/2017-June/02
>>> 3943.html
>>> [3] https://mailman.science.uu.nl/pipermail/nix-dev/2017-June/02
>>> 3946.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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