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notifier(7)                                      Apple Inc.                                      notifier(7)



NAME
       notifier - cups notification interface

SYNOPSIS
       notifier recipient [ user-data ]

DESCRIPTION
       The  CUPS notifier interface provides a standard method for adding support for new event notification
       methods to CUPS. Each notifier delivers one or more IPP events from the standard input to the  speci-fied specified
       fied recipient.

       Notifiers  must  read IPP messages from the standard input using the ippNew and ippReadFile functions
       and exit on error. Notifiers are encouraged to exit after a suitable period  of  inactivity,  however
       they may exit after reading the first message or stay running until an error is seen.

LOG MESSAGES
       Messages  sent to stderr are generally logged to the current ErrorLog.  Each line begins with a stan-dard standard
       dard prefix:


       ALERT: message
            Sets the printer-state-message attribute and adds the specified message to the current  ErrorLog
            using the "alert" log level.


       CRIT: message
            Sets  the printer-state-message attribute and adds the specified message to the current ErrorLog
            using the "critical" log level.


       DEBUG: message
            Sets the printer-state-message attribute and adds the specified message to the current  ErrorLog
            using the "debug" log level.


       DEBUG2: message
            Sets  the printer-state-message attribute and adds the specified message to the current ErrorLog
            using the "debug2" log level.


       EMERG: message
            Sets the printer-state-message attribute and adds the specified message to the current  ErrorLog
            using the "emergency" log level.


       ERROR: message
            Sets  the printer-state-message attribute and adds the specified message to the current ErrorLog
            using the "error" log level.


       INFO: message
            Sets the printer-state-message attribute. If the current LogLevel is set to "debug2", also  adds
            the specified message to the current ErrorLog using the "info" log level.


       NOTICE: message
            Sets  the printer-state-message attribute and adds the specified message to the current ErrorLog
            using the "notice" log level.


       WARNING: message
            Sets the printer-state-message attribute and adds the specified message to the current  ErrorLog
            using the "warning" log level.


ENVIRONMENT VARIABLES
       The following environment variables are defined by the CUPS server when executing the notifier:


       CHARSET
            The default text character set, typically utf-8.


       CUPS_CACHEDIR
            The directory for semi-persistent cache files can be found.


       CUPS_DATADIR
            The directory where data files can be found.


       CUPS_FILETYPE
            The type of file being printed: "job-sheet" for a banner page and "document" for a regular print
            file.


       CUPS_SERVERROOT
            The root directory of the server.


       LANG
            The default language locale (typically C or en).


       PATH
            The standard execution path for external programs that may be run by the filter.


       SOFTWARE
            The name and version number of the server (typically CUPS/1.2).


       TZ
            The timezone of the server.


       USER
            The user executing the filter, typically "lp"; consult the cupsd.conf(5) file  for  the  current
            setting.


SEE ALSO
       backend(7), cupsd(8), filter(7),
       http://localhost:631/help

COPYRIGHT
       Copyright 2007-2009 by Apple Inc.



12 May 2009                                         CUPS                                         notifier(7)