man/filter.man

   1 .\"
   2 .\" "$Id: filter.man 6649 2007-07-11 21:46:42Z mike $"
   3 .\"
   4 .\"   filter man page for the Common UNIX Printing System (CUPS).
   5 .\"
   6 .\"   Copyright 2007-2008 by Apple Inc.
   7 .\"   Copyright 1997-2007 by Easy Software Products.
   8 .\"
   9 .\"   These coded instructions, statements, and computer programs are the
  10 .\"   property of Apple Inc. and are protected by Federal copyright
  11 .\"   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  12 .\"   which should have been included with this file.  If this file is
  13 .\"   file is missing or damaged, see the license at "http://www.cups.org/".
  14 .\"
  15 .TH filter 7 "Common UNIX Printing System" "14 May 2008" "Apple Inc."
  16 .SH NAME
  17 filter \- cups file conversion filter interface
  18 .SH SYNOPSIS
  19 .B filter
  20 job user title num-copies options [
  21 .I filename
  22 ]
  23 .SH DESCRIPTION
  24 The CUPS filter interface provides a standard method for adding support for
  25 new document types to CUPS. Each filter is capable of converting from one
  26 or more input formats to another format that can either be printed directly
  27 or piped into another filter to get it to a printable format.
  28 .LP
  29 Filters \fBmust\fR be capable of reading from a filename on the command-line
  30 or from the standard input, copying the standard input to a temporary
  31 file as required by the file format. All output \fBmust\fR be sent to the
  32 standard output.
  33 .LP
  34 The command name (argv[0]) is set to the name of the destination printer.
  35 .SH LOG MESSAGES
  36 Messages sent to stderr are generally logged to
  37 printer-state-message attribute and the current \fIErrorLog\fR.
  38 Each line begins with a standard prefix:
  39
  40 .TP 5
  41 ALERT: message
  42 .br
  43 Sets the printer-state-message attribute and adds the specified
  44 message to the current \fIErrorLog\fR using the "alert" log level.
  45
  46 .TP 5
  47 ATTR: attribute=value [attribute=value]
  48 .br
  49 Sets the named job attribute(s). Typically this will be used to
  50 set the job-remote-id attribute.
  51
  52 .TP 5
  53 CRIT: message
  54 .br
  55 Sets the printer-state-message attribute and adds the specified
  56 message to the current \fIErrorLog\fR using the "critical" log level.
  57
  58 .TP 5
  59 DEBUG: message
  60 .br
  61 Sets the printer-state-message attribute and adds the specified
  62 message to the current \fIErrorLog\fR using the "debug" log level.
  63
  64 .TP 5
  65 DEBUG2: message
  66 .br
  67 Sets the printer-state-message attribute and adds the specified
  68 message to the current \fIErrorLog\fR using the "debug2" log level.
  69
  70 .TP 5
  71 EMERG: message
  72 .br
  73 Sets the printer-state-message attribute and adds the specified
  74 message to the current \fIErrorLog\fR using the "emergency" log level.
  75
  76 .TP 5
  77 ERROR: message
  78 .br
  79 Sets the printer-state-message attribute and adds the specified
  80 message to the current \fIErrorLog\fR using the "error" log level.
  81
  82 .TP 5
  83 INFO: message
  84 .br
  85 Sets the printer-state-message attribute. If the current \fILogLevel\fR
  86 is set to "debug2", also adds the specified message to the
  87 current \fIErrorLog\fR using the "info" log level.
  88
  89 .TP 5
  90 NOTICE: message
  91 .br
  92 Sets the printer-state-message attribute and adds the specified
  93 message to the current \fIErrorLog\fR using the "notice" log level.
  94
  95 .TP 5
  96 PAGE: page-number #-copies
  97 .TP 5
  98 PAGE: total #-pages
  99 .br
 100 Adds an entry to the current \fIPageLog\fR. The first form adds
 101 #-copies to the job-media-sheets-completed attribute. The second
 102 form sets the job-media-sheets-completed attribute to #-pages.
 103
 104 .TP 5
 105 PPD: Keyword=Value ... KeywordN=Value
 106 .br
 107 Sets the named keywords in the printer's PPD file. This is typically
 108 used to update default option keywords such as DefaultPageSize and
 109 the various installable options in the PPD file.
 110
 111 .TP 5
 112 STATE: printer-state-reason [printer-state-reason ...]
 113 .TP 5
 114 STATE: + printer-state-reason [printer-state-reason ...]
 115 .TP 5
 116 STATE: - printer-state-reason [printer-state-reason ...]
 117 .br
 118 Sets, adds, or removes printer-state-reason keywords to the
 119 current queue. Typically this is used to indicate media, ink, and
 120 toner conditions on a printer.
 121
 122 .TP 5
 123 WARNING: message
 124 .br
 125 Sets the printer-state-message attribute and adds the specified
 126 message to the current \fIErrorLog\fR using the "warning" log level.
 127
 128 .SH ENVIRONMENT VARIABLES
 129 The following environment variables are defined by the CUPS
 130 server when executing the filter:
 131
 132 .TP 5
 133 CHARSET
 134 .br
 135 The default text character set, typically utf-8.
 136
 137 .TP 5
 138 CLASS
 139 .br
 140 When a job is submitted to a printer class, contains the name of
 141 the destination printer class. Otherwise this environment
 142 variable will not be set.
 143
 144 .TP 5
 145 CONTENT_TYPE
 146 .br
 147 The MIME type associated with the file (e.g.
 148 application/postscript).
 149
 150 .TP 5
 151 CUPS_DATADIR
 152 .br
 153 The directory where data files can be found.
 154
 155 .TP 5
 156 CUPS_SERVERROOT
 157 .br
 158 The root directory of the server.
 159
 160 .TP 5
 161 DEVICE_URI
 162 .br
 163 The device-uri associated with the printer.
 164
 165 .TP 5
 166 FINAL_CONTENT_TYPE
 167 .br
 168 The MIME type associated with the printer (e.g.
 169 application/vnd.cups-postscript).
 170
 171 .TP 5
 172 LANG
 173 .br
 174 The default language locale (typically C or en).
 175
 176 .TP 5
 177 PATH
 178 .br
 179 The standard execution path for external programs that may be run by
 180 the filter.
 181
 182 .TP 5
 183 PPD
 184 .br
 185 The full pathname of the PostScript Printer Description (PPD)
 186 file for this printer.
 187
 188 .TP 5
 189 PRINTER
 190 .br
 191 The name of the printer.
 192
 193 .TP 5
 194 RIP_CACHE
 195 .br
 196 The recommended amount of memory to use for Raster Image
 197 Processors (RIPs).
 198
 199 .TP 5
 200 SOFTWARE
 201 .br
 202 The name and version number of the server (typically CUPS/1.2).
 203
 204 .TP 5
 205 TZ
 206 .br
 207 The timezone of the server.
 208
 209 .TP 5
 210 USER
 211 .br
 212 The user executing the filter, typically "lp" or "root"; consult the
 213 \fIcupsd.conf(5)\fR file for the current setting.
 214
 215 .SH COMPATIBILITY
 216 While the filter interface is compatible with System V interface
 217 scripts, it will only work with the System V interface script as the
 218 only filter.  Typically the interface script will be provided via the
 219 \fIlpadmin(8)\fR command using the \fI-i\fR option.
 220 .SH SEE ALSO
 221 \fIbackend(1)\fR, \fIcupsd(8)\fR,
 222 .br
 223 http://localhost:631/help
 224 .SH COPYRIGHT
 225 Copyright 2007 by Apple Inc.
 226 .\"
 227 .\" End of "$Id: filter.man 6649 2007-07-11 21:46:42Z mike $".
 228 .\"