Re: [X2Go-User] Remote printing not working

[Mike Gabriel]

Hi Rui,

On  Sa 23 Sep 2023 02:01:23 CEST, Rui Ferreira wrote:

Às 19:37 de 21/09/23, Mike Gabriel escreveu:

HI Rui,

thanks for reporting the below issue.

[...]>

However, we can tweak cups-x2go [1]. It would be nice if you could experiment with that a little and move the "$ENV{TMPDIR}="/tmp";" statement that is part of the script to the very top of the script (after all the "use ...;" statements.

Thanks,
Mike

When done, remove your hack again (which brings back more security into your CUPS daemon) and re-test cups-x2go. Let me know if that works for you. If so, please send your patch.

Hello Mike

Thank you for your fast response and sorry for my slow one.

It wasn't that, but your tip showed me the way.
The answer begins here:

https://git.ghostscript.com/?p=ghostpdl.git&a=search&h=HEAD&st=commit&s=setpdfwrite


To solve this, I edited /etc/cups/cups-x2go.conf:



This alone should've solved my problem... yet it wasn't working :(


my $gs_pid = open2 ($gs_out, $gs_in, $ps2pdf_cmd, @ps2pdf_args);

where $ps2pdf_cmd would translate to ' /usr/bin/gs'.

So, I had to learn just enough Perl to correct this:

if($option eq "ps2pdf")
{
        $ps2pdf=$value;
        $ps2pdf=~s/^\s+//; <-------- my solution
}

Now, about sending patches... I've never done it before.



I'm too uncertain.

Regards,
Rui Ferreira

Ghostscript deprecated 'setpdfwrite' in 2019 and removed it in 2021, or version 9.54. ps2pdf = /usr/bin/gs -q -dCompatibilityLevel=1.4 -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pdfwrite -sOutputFile=- -dAutoRotatePages=/PageByPage -dAutoFilterColorImages=false -dColorImageFilter=/FlateEncode -dPDFSETTINGS=/prepress -dDoNumCopies -f \"%s\" After many hours of self commiseration, I found that the culprit to be a leading space in the command, in this line I'm not sure if just changing the default ghostscript command line, hardcoded in the Perl script and the .conf file, is the best solution for everyone. And I'm not sure if the way I found to trim that leading whitespace is the best solution.

<install package git>
git clone https://code.x2go.org/git/cups-x2go.git



Change dir into that folder and check output of "git diff".



The run "git format-patch HEAD~..HEAD". This will create a patch file.

Please send this patch file attached to a reply to this mail.

Thanks!

Mike


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Thanks for the follow-up. To be 100% sure, your changes land in cups-x2go appropriately, please do the following: Now copy your version of the cups-x2go script into the newly cloned cups-x2go/ folder. Commit that change, e.g. via "git commit --patch -m "cups-x2go: Fix <this and that>." Find a good commit message one-liner.

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