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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 sup‐
       port for new event notification methods to CUPS. Each notifier delivers
       one or more IPP events from the standard input to the specified recipi‐
       ent.

       Notifiers must read IPP messages from the standard input using the ipp‐
       New  and ippReadFile functions and exit on error. Notifiers are encour‐
       aged 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 standard 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)

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