.\"
.\" "$Id: notifier.man 8999 2010-02-24 01:01:04Z mike $"
.\"
.\"   notifier man page for CUPS.
.\"
.\"   Copyright 2007-2009 by Apple Inc.
.\"   Copyright 1997-2007 by Easy Software Products.
.\"
.\"   These coded instructions, statements, and computer programs are the
.\"   property of Apple Inc. and are protected by Federal copyright
.\"   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
.\"   which should have been included with this file.  If this file is
.\"   file is missing or damaged, see the license at "http://www.cups.org/".
.\"
.TH notifier 7 "CUPS" "12 May 2009" "Apple Inc."
.SH NAME
notifier \- cups notification interface
.SH SYNOPSIS
.B notifier
.I recipient
[
.I user-data
]
.SH 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 specified recipient.
.LP
Notifiers \fBmust\fR 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.
.SH LOG MESSAGES
Messages sent to stderr are generally logged to the current \fIErrorLog\fR.
Each line begins with a standard prefix:

.TP 5
ALERT: message
.br
Sets the printer-state-message attribute and adds the specified
message to the current \fIErrorLog\fR using the "alert" log level.

.TP 5
CRIT: message
.br
Sets the printer-state-message attribute and adds the specified
message to the current \fIErrorLog\fR using the "critical" log level.

.TP 5
DEBUG: message
.br
Sets the printer-state-message attribute and adds the specified
message to the current \fIErrorLog\fR using the "debug" log level.

.TP 5
DEBUG2: message
.br
Sets the printer-state-message attribute and adds the specified
message to the current \fIErrorLog\fR using the "debug2" log level.

.TP 5
EMERG: message
.br
Sets the printer-state-message attribute and adds the specified
message to the current \fIErrorLog\fR using the "emergency" log level.

.TP 5
ERROR: message
.br
Sets the printer-state-message attribute and adds the specified
message to the current \fIErrorLog\fR using the "error" log level.

.TP 5
INFO: message
.br
Sets the printer-state-message attribute. If the current \fILogLevel\fR
is set to "debug2", also adds the specified message to the
current \fIErrorLog\fR using the "info" log level.

.TP 5
NOTICE: message
.br
Sets the printer-state-message attribute and adds the specified
message to the current \fIErrorLog\fR using the "notice" log level.

.TP 5
WARNING: message
.br
Sets the printer-state-message attribute and adds the specified
message to the current \fIErrorLog\fR using the "warning" log level.

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

.TP 5
CHARSET
.br
The default text character set, typically utf-8.

.TP 5
CUPS_CACHEDIR
.br
The directory for semi-persistent cache files can be found.

.TP 5
CUPS_DATADIR
.br
The directory where data files can be found.

.TP 5
CUPS_FILETYPE
.br
The type of file being printed: "job-sheet" for a banner page and "document"
for a regular print file.

.TP 5
CUPS_SERVERROOT
.br
The root directory of the server.

.TP 5
LANG
.br
The default language locale (typically C or en).

.TP 5
PATH
.br
The standard execution path for external programs that may be run by
the filter.

.TP 5
SOFTWARE
.br
The name and version number of the server (typically CUPS/1.2).

.TP 5
TZ
.br
The timezone of the server.

.TP 5
USER
.br
The user executing the filter, typically "lp"; consult the \fIcupsd.conf(5)\fR
file for the current setting.

.SH SEE ALSO
\fIbackend(7)\fR, \fIcupsd(8)\fR, \fIfilter(7)\fR,
.br
http://localhost:631/help
.SH COPYRIGHT
Copyright 2007-2009 by Apple Inc.
.\"
.\" End of "$Id: notifier.man 8999 2010-02-24 01:01:04Z mike $".
.\"