Changeset 659 for tea4cups/trunk/README

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Timestamp:
09/29/05 00:45:28 (19 years ago)
Author:
jerome
Message:

Added filters.
Added the onfail directive to tea4cups.conf

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1 modified

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  • tea4cups/trunk/README

    r645 r659  
    2424 
    2525Tea4CUPS behaves just like any other CUPS backend, but allows you to 
    26 transparently send print jobs' datas to any number of outputs : other 
    27 CUPS backends, files or pipes. 
     26modify print jobs' datas as they pass through it and to transparently  
     27send them to any number of outputs : other CUPS backends, files or pipes. 
    2828 
    2929This for example allows you to output the same print job on several 
    … …  
    3737commands into the very last stage of CUPS' filtering chain. 
    3838 
    39 Tea4CUPS provides two ways to launch commands : 
     39Tea4CUPS provides three ways to launch commands : 
     40 
     41        - filters : A filter can modify the input datas before they 
     42                    are sent to the printer or made available to 
     43                    the pre and post hooks defined below. 
     44                    Currently a single filter can be defined 
     45                    per print queue. 
    4046 
    4147        - prehooks : these are guaranteed to be launched before the 
    4248                     print job is sent to the real printer. 
    4349                     Any prehook which exits -1 can cancel the 
    44                      print job. 
     50                     print job. Any number of prehooks can be 
     51                     defined for a particular print queue. 
    4552 
    4653        - posthooks : these are guaranteed to be launched after the 
    4754                      print job has been sent to the real printer, 
    4855                      unless the job was previously cancelled by a 
    49                       prehook. 
     56                      prehook. Any number of posthooks can be  
     57                      defined for a particular print queue. 
    5058 
    5159To help your own commands, Tea4CUPS makes available as part of the 
    5260environment several variables which can be used from the 
    53 commands you use : 
     61commands you use in pre and post hooks : 
    5462 
    5563        TEAPRINTERNAME : The print queue name. 
    … …  
    7078                    posthooks, obviously. 
    7179 
    72 In the case you want to use both Tea4CUPS and PyKota, you MUST install 
    73 PyKota v1.22alpha2 or higher to avoid a race condition. 
    74  
     80        None of these environment variables is available to filters. 
     81   
    7582NB : Tea4CUPS requires a version of Python >= 2.1 
    7683