[cups] Printing with SMB-Kerberos in CUPS on Ubuntu 16.04

[Narcis Garcia]

It might be caused by Systemd isolation.
Test & log actions with a filter script.


El 09/08/17 a les 12:24, Van Svensson ha escrit:
> Hello again,
> 
> I have now tested to run smbspool manually with "cat file.ps | smbspool -k 1 myuser test 1" and the printing works on both Ubuntu 14.04 and 16.04!
> 
> Any ideas of why smbspool fails in Ubuntu 16.04 LTS when invoked from CUPS 2.1.3-4 (default) while it works perfectly in CUPS 1.7.2-0ubuntu1.8 (default) on Ubuntu 14.04 LTS?
> 
> Maybe the error message "Could not determine network interfaces, you must use a interfaces config line" is relevant?
> 
> The file /etc/cups/printers.conf looks almost the same in Ubuntu 14.04 and 16.04:
> 
> ubuntu_16.04# cat /etc/cups/printers.conf
> # Printer configuration file for CUPS v2.1.3
> # Written by cupsd
> # DO NOT EDIT THIS FILE WHEN CUPSD IS RUNNING
> <Printer PDF>
> UUID urn:uuid:e9..the_uuid...ed
> Info PDF
> DeviceURI cups-pdf:/
> State Idle
> StateTime 1410113686
> ConfigTime 1501962091
> Type 8450124
> Accepting Yes
> Shared No
> JobSheets none none
> QuotaPeriod 0
> PageLimit 0
> KLimit 0
> OpPolicy default
> ErrorPolicy retry-job
> </Printer>
> <DefaultPrinter Myprinter>
> UUID urn:uuid:86..the_uuid..6a
> AuthInfoRequired negotiate
> Info Myprinter
> MakeModel KONICA MINOLTA C658SeriesPS(P)
> DeviceURI smb://myprinter.my.domain/MYPRINTER
> State Idle
> StateTime 1491212856
> ConfigTime 1501962104
> Type 8401100
> Accepting Yes
> Shared No
> JobSheets none none
> QuotaPeriod 0
> PageLimit 0
> KLimit 0
> OpPolicy default
> ErrorPolicy retry-job
> </DefaultPrinter>
> 
> # diff ubuntu1404-printers.conf-myprinter ubuntu1604-printers.conf-myprinter
> 7d6
> < PPDTimeStamp *
> 9a9
>> ConfigTime 1501962104
> 13d12
> < ColorManaged Yes
> 20c19
> < </Printer>
> ---
>> </DefaultPrinter>
> 
> Thank you very much in advance!
> 
> Van Svensson wrote:
> 
>> I'm running Ubuntu 14.04 LTS and printing using SMB-Kerberos through CUPS 1.7.2-0ubuntu1.8 (default) and everything works. However, on another computer I have installed Ubuntu 16.04 LTS with CUPS 2.1.3-4 (default) but the printing does no longer work.
>>
>> On both 14.04 and 16.04 Samba seem to be the same version, 2:4.3.11+dfsg-0ubuntu0.14.04.10 and 2:4.3.11+dfsg-0ubuntu0.16.04.9.
>>
>> For both 14.04 and 16.04 I have that
>> * "AuthInfoRequired negotiate" is set in /etc/cups/printers.conf
>> * /usr/lib/cups/backend/smb is a symbolic link to /usr/bin/smbspool_krb5_wrapper
>> * /usr/bin/smbspool_krb5_wrapper is chmod 700
>>
>> Can somebody please help me track down the problem from the CUPS error messages in /var/log/cups/error_log from the 16.04 installation? (I have set "LogLevel debug" in /etc/cups/cupsd.conf)
>>
>> D [05/Aug/2017:12:52:04 +0200] [Job 89] SMBSPOOL_KRB5 - Started with uid=0
>> D [05/Aug/2017:12:52:04 +0200] [Job 89] SMBSPOOL_KRB5 - AUTH_INFO_REQUIRED=negotiate
>> D [05/Aug/2017:12:52:04 +0200] [Job 89] SMBSPOOL_KRB5 - Switching to gid=1000
>> D [05/Aug/2017:12:52:04 +0200] [Job 89] SMBSPOOL_KRB5 - Switching to uid=1000
>> D [05/Aug/2017:12:52:04 +0200] [Job 89] SMBSPOOL_KRB5 - Setting KRB5CCNAME to \'FILE:/tmp/krb5cc_1000\'
>> D [05/Aug/2017:12:52:04 +0200] [Client 12] HTTP_STATE_WAITING Closing for error 32 (Broken pipe)
>> D [05/Aug/2017:12:52:04 +0200] [Client 12] Closing connection.
>> D [05/Aug/2017:12:52:04 +0200] cupsdSetBusyState: newbusy="Printing jobs and dirty files", busy="Printing jobs and dirty files"
>> E [05/Aug/2017:12:52:04 +0200] [Job 89] Could not determine network interfaces, you must use a interfaces config line
>>
>> I see that double backslashes are used in 16.04 when SMBSPOOL_KRB5 is setting KRB5CCNAME, can that cause this problem?
>> Ubuntu 16.04 /var/log/cups/error_log: SMBSPOOL_KRB5 - Setting KRB5CCNAME to \'FILE:/tmp/krb5cc_1000\'
>> Ubuntu 14.04 /var/log/cups/error_log: SMBSPOOL_KRB5 - Setting KRB5CCNAME to 'FILE:/tmp/krb5cc_1000'
>>
>> Do you have any idea about what the error "HTTP_STATE_WAITING Closing for error 32 (Broken pipe)" can tell me in this situation when it is printed right after SMBSPOOL_KRB5 has set KRB5CCNAME?
>>
>> Also wondering about why I get this right after the above error: "Could not determine network interfaces, you must use a interfaces config line"
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