nixpkgs/upstart-jobs/cupsd.nix

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{config, pkgs}:
let
logDir = "/var/log/cups";
inherit (pkgs) cups;
# Here we can enable additional backends, filters, etc. that are not
# part of CUPS itself, e.g. the SMB backend is part of Samba. Since
# we can't update ${cups}/lib/cups itself, we create a symlink tree
# here and add the additional programs. The ServerBin directive in
# cupsd.conf tells cupsd to use this tree.
bindir = pkgs.runCommand "cups-progs" {} ''
ensureDir $out/lib/cups
ln -s ${cups}/lib/cups/* $out/lib/cups/
rm $out/lib/cups/backend
ensureDir $out/lib/cups/backend
ln -s ${cups}/lib/cups/backend/* $out/lib/cups/backend/
ln -s ${pkgs.samba}/bin/smbspool $out/lib/cups/backend/smb
''; # */
cupsdConfig = pkgs.writeText "cupsd.conf" ''
LogLevel info
SystemGroup root
Listen localhost:631
Listen /var/run/cups/cups.sock
ServerRoot ${cups}/etc/cups
ServerBin ${bindir}/lib/cups
AccessLog ${logDir}/access_log
ErrorLog ${logDir}/access_log
PageLog ${logDir}/page_log
TempDir /tmp
Browsing On
BrowseOrder allow,deny
BrowseAllow @LOCAL
DefaultAuthType Basic
<Location />
Order allow,deny
Allow localhost
</Location>
<Location /admin>
Order allow,deny
Allow localhost
</Location>
<Location /admin/conf>
AuthType Basic
Require user @SYSTEM
Order allow,deny
Allow localhost
</Location>
<Policy default>
<Limit Send-Document Send-URI Hold-Job Release-Job Restart-Job Purge-Jobs Set-Job-Attributes Create-Job-Subscription Renew-Subscription Cancel-Subscription Get-Notifications Reprocess-Job Cancel-Current-Job Suspend-Current-Job Resume-Job CUPS-Move-Job>
Require user @OWNER @SYSTEM
Order deny,allow
</Limit>
<Limit Pause-Printer Resume-Printer Set-Printer-Attributes Enable-Printer Disable-Printer Pause-Printer-After-Current-Job Hold-New-Jobs Release-Held-New-Jobs Deactivate-Printer Activate-Printer Restart-Printer Shutdown-Printer Startup-Printer Promote-Job Schedule-Job-After CUPS-Add-Printer CUPS-Delete-Printer CUPS-Add-Class CUPS-Delete-Class CUPS-Accept-Jobs CUPS-Reject-Jobs CUPS-Set-Default>
AuthType Basic
Require user @SYSTEM
Order deny,allow
</Limit>
<Limit Cancel-Job CUPS-Authenticate-Job>
Require user @OWNER @SYSTEM
Order deny,allow
</Limit>
<Limit All>
Order deny,allow
</Limit>
</Policy>
'';
in
{
name = "cupsd";
extraPath = [
cups
];
job = ''
description "CUPS printing daemon"
start on network-interfaces/started
stop on network-interfaces/stop
start script
mkdir -m 0755 -p ${logDir}
mkdir -m 0700 -p /var/cache/cups
mkdir -m 0700 -p /var/spool/cups
end script
respawn ${cups}/sbin/cupsd -c ${cupsdConfig} -F
'';
}