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When a process except cupsd uses the port 631, Samba which enables CUPS can't boot. #1535

michaelrsweet opened this issue Apr 4, 2006 · 1 comment


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@michaelrsweet michaelrsweet commented Apr 4, 2006

Version: -feature User: yasuma

I find a problem about the CUPS function of Samba.

When the cups daemon doesn't work and the port 631 is used by another process, the smbd which enables the CUPS function can't boot.

Even if the port 631 has already used by another process, the smbd connects to the 631 port for the initialisation of CUPS.
And the smbd stalls in the cupsDoRequest().

Because the current implementation of cupsDoRequest() doesn't have any timeout mechanism, it may be difficult to avoid this situation.
I think it needs a enhancement to verify the server daemon or detect the timeout.

I filed this problem to a Bugzilla of Samba.

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@michaelrsweet michaelrsweet commented Apr 22, 2006 User: mike

This will need to be fixed in Samba - CUPS supports non-blocking IO with timeouts...

That said, port 631 is reserved for use with IPP, so any process using that port for something other than IPP is non-compliant...

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