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 deliv-
       ers one or more IPP events from the standard input to the specified 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 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)