Re: Setting up plug and print on GuixSD?

[myglc2]

I installed cups package on my headless GuixSD server. lpr works fine as
long as the config is specified on the command line,e.g.,

/run/current-system/profile/bin/lpr -H 192.168.1.6 -P C5200n

I don't need cupsd for my purposes, but I looked at it a bit. Notes on
what I discovered on the chance it could be useful to others...

address@hidden (Ludovic Courtès) writes:

> address@hidden skribis:
>
>> On 2016-02-02 11:45, address@hidden wrote:
>>> On 2016-02-01 14:43, address@hidden wrote:
>>>> address@hidden skribis:
[...]
>>> The package installs corrupt config-files according to
>>> $ cupsd -t
>>> "/gnu/store/qs3xymcsgxa68i8m188261rhxsszx7za-cups-2.1.0/etc/cups/cups-files.conf"
>>> contains errors.
>
> Yeah, I have the same error, which is interesting given that this file
> comes straight from upstream.
>

This is because the cups-files.conf file contains the line ...

SystemGroup lpadmin sys system root

... w/ groups that don't exist.

> I see that our CUPS is *not* built with --localstatedir=/var, so it will
> try to access and maybe modify stuff in /gnu/store/…-cups-2.1.0, which
> is not good.  We should fix it.
>
> In the meantime, you can run:
>
>   cupsd -c /path/to/your/cupsd.conf
>

Things I did ...

cp -R /gnu/store/1mffhgz5xdrn3ylb5hfqx3vq45jqf8q1-cups-minimal-2.1.0/etc/cups 
/etc

### replace "/gnu/store/1mffhgz5xdrn3ylb5hfqx3vq45jqf8q1-cups-minimal-2.1.0" 
with "" 
### in 
### /etc/cups/cupsd.conf &
### /etc/cups/cups-files.conf

mkdir /var/log/cups

### remove unknown Groups from /etc/cups/cupsd.conf

cupsd -t -f -c /etc/cups/cupsd.conf
"/etc/cups/cups-files.conf" is OK.
"/etc/cups/cupsd.conf" is OK.

cupsd -f -c /etc/cups/cupsd.conf

### produced the attached /var/log/cups/error_log

The bottom line is that it looks to me like this might work if the
--localstatedir=/var problem is fixed.

HTH - George


E [23/Jul/2016:19:06:30 -0400] Unable to change ownership of 
"/gnu/store/nzn63rp7vzzgy85vnxrcj70a9xiz96h1-cups-2.1.0/var/spool/cups" - 
Read-only file system
E [23/Jul/2016:19:06:30 -0400] Unable to change ownership of 
"/gnu/store/nzn63rp7vzzgy85vnxrcj70a9xiz96h1-cups-2.1.0/var/cache/cups" - 
Read-only file system
E [23/Jul/2016:19:06:30 -0400] Unable to change ownership of 
"/gnu/store/nzn63rp7vzzgy85vnxrcj70a9xiz96h1-cups-2.1.0/var/cache/cups/rss" - 
Read-only file system
E [23/Jul/2016:19:06:30 -0400] Unable to change ownership of 
"/gnu/store/nzn63rp7vzzgy85vnxrcj70a9xiz96h1-cups-2.1.0/var/run/cups" - 
Read-only file system
E [23/Jul/2016:19:06:30 -0400] Unable to change ownership of 
"/gnu/store/nzn63rp7vzzgy85vnxrcj70a9xiz96h1-cups-2.1.0/var/run/cups/certs" - 
Read-only file system
E [23/Jul/2016:19:06:30 -0400] Unable to change ownership of 
"/gnu/store/nzn63rp7vzzgy85vnxrcj70a9xiz96h1-cups-2.1.0/var/spool/cups/tmp" - 
Read-only file system
E [23/Jul/2016:19:06:30 -0400] Filter "pstopdf" not found.
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E [23/Jul/2016:19:06:30 -0400] Filter "imagetoraster" not found.
E [23/Jul/2016:19:06:30 -0400] Unable to create certificate file 
/gnu/store/nzn63rp7vzzgy85vnxrcj70a9xiz96h1-cups-2.1.0/var/run/cups/certs/0 - 
Read-only file system