[cups.general] Printing from read-only file system

[v.sudeep at exgate.tek.com]

Hello,

Thanks a lot for response !

Version : CUPS 1.1.20.

It was not sufficient to only change things in the cupsd.conf file. The
ServerRoot directory contained a lot of files that were NOT being
written or created and also a lot of files/directories that were being
written/created. Hence I had to change some of the code to use TempDir
instead of the ServerRoot.

I logged into the instrument and tried to add the printer from the
instrument itself. NO remote connection involved here. I set the debug
level to "debug2". The log file shows that the printer has started
correctly. But after that there are no additional messages. However
shutting down the cupsd adds the messages correctly. 

- S u d e e p    V
Art is a lie that makes us realise the truth. 
-Louis Pasteur. 




-----Original Message-----
From: cups-bounces at easysw.com [mailto:cups-bounces at easysw.com] On Behalf
Of Michael Sweet
Sent: Tuesday, December 13, 2005 8:37 PM
To: cups at easysw.com
Subject: Re: [cups.general] Printing from read-only file system


v.sudeep at exgate.tek.com wrote:
> 
> 
> Hello !!!
> 
> I have installed the CUPS printing system on my Linux instrument. I
made 

What version of CUPS?

> some changes to the code to make sure that certain files such as the 
> printers.conf and ppd files are all written to the /tmp directory
which 
> is loaded onto the RAM. ( I understand that this would need me to
create 
> the printer every time I reboot the instrument. I have succeeded in 
> printing to both the usb printers and the network printers.
> 
> I also removed the "write" permissions on all directories and files 
> except the /tmp directory and its contents. And still am able to
print.
> 
> Now however, when I tried to apply the manual lock on the flash 
> partition, though I am able to start the cupsd daemon, I am unable to
do 
> any other actions such as lpq, lpstat or lpadmin. All of them return 
> with the error "Unable to connect to server. Connection timed out."
> 
> Can anyone tell me what other files have to be moved out of the
regular 
> filesystem ? i.e. What are the files that are opened for "write" 
> operations during i) starting the cupsd ii) during all  regular
printing 
> operations (such as lp, lpq and lpstat )

If you have already set ServerRoot, RequestRoot, and TempDir (sounds
like you have), then you should be OK.  If you have CUPS 1.2, make
sure you set CacheDir and StateDir to /tmp/something as well.

Are you seeing the "connection timed out" message on the device
itself, or when doing a remote connection from another computer?

-- 
______________________________________________________________________
Michael Sweet, Easy Software Products           mike at easysw dot com
Internet Printing and Document Software          http://www.easysw.com
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