/usr/share/doc/lprng-doc/LPRng-Reference-Multipart/jobtransfer.htm is in lprng-doc 3.8.A~rc2-3.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta name="generator" content=
"HTML Tidy for HTML5 for Linux version 5.2.0">
<title>Job Transfer</title>
<meta name="GENERATOR" content=
"Modular DocBook HTML Stylesheet Version 1.79">
<link rel="HOME" title=" LPRng Reference Manual" href=
"index.htm">
<link rel="UP" title="RFC 1179 - Line Printer Daemon Protocol "
href="rfc1179ref.htm">
<link rel="PREVIOUS" title="Protocol Requests and Replies " href=
"remotesupport.htm">
<link rel="NEXT" title="Data File Transfer" href="x10288.htm">
</head>
<body class="SECT1" bgcolor="#FFFFFF" text="#000000" link="#0000FF"
vlink="#840084" alink="#0000FF">
<div class="NAVHEADER">
<table summary="Header navigation table" width="100%" border=
"0" cellpadding="0" cellspacing="0">
<tr>
<th colspan="3" align="center">LPRng Reference Manual: 24
Sep 2004 (For LPRng-3.8.28)</th>
</tr>
<tr>
<td width="10%" align="left" valign="bottom"><a href=
"remotesupport.htm" accesskey="P">Prev</a></td>
<td width="80%" align="center" valign="bottom">Chapter 19.
RFC 1179 - Line Printer Daemon Protocol</td>
<td width="10%" align="right" valign="bottom"><a href=
"x10288.htm" accesskey="N">Next</a></td>
</tr>
</table>
<hr align="left" width="100%">
</div>
<div class="SECT1">
<h1 class="SECT1"><a name="JOBTRANSFER" id="JOBTRANSFER">19.3.
Job Transfer</a></h1>
<p>Options used:</p>
<ul>
<li>
<p><tt class="LITERAL">longnumber</tt> FLAG <span class=
"emphasis"><i class="EMPHASIS">Long job number (6
digits)</i></span></p>
</li>
<li>
<p><tt class="LITERAL">send_data_first</tt> FLAG
<span class="emphasis"><i class="EMPHASIS">Send data files
first</i></span></p>
</li>
<li>
<p><tt class="LITERAL">use_shorthost</tt><span class=
"emphasis"><i class="EMPHASIS">Use short
hostname</i></span></p>
</li>
</ul>
<p>A job transfer operation starts with a job transfer request,
followed by several file transfer operations. At the end of the
file transfers, the connection should be closed.</p>
<p>A file transfer request has the form:</p>
<div class="INFORMALTABLE">
<a name="AEN10197" id="AEN10197"></a>
<table border="1" frame="border" rules="all" class=
"CALSTABLE">
<col>
<col>
<thead>
<tr>
<th>Command</th>
<th>Purpose</th>
</tr>
</thead>
<tbody>
<tr>
<td>\001\n</td>
<td>abort</td>
</tr>
<tr>
<td>\002nnnn cfname</td>
<td>control file transfer</td>
</tr>
<tr>
<td>\003nnnn dfname</td>
<td>data file transfer</td>
</tr>
</tbody>
</table>
</div>
<p>The abort operation is used to terminate job transfer and
indicate that the job should not be processed for printing. The
connection will be closed and the partly transferred job will
be discarded.</p>
<p>The control file and data file transfer commands have a
length (in bytes) of the file and the name of the file to be
transferred. When the command is received, the server will
reply with a status line:</p>
<div class="INFORMALTABLE">
<a name="AEN10215" id="AEN10215"></a>
<table border="1" frame="border" rules="all" class=
"CALSTABLE">
<col>
<col>
<thead>
<tr>
<th>Status</th>
<th>Purpose</th>
</tr>
</thead>
<tbody>
<tr>
<td>\000</td>
<td>Accepted, proceed</td>
</tr>
<tr>
<td>\nnn</td>
<td>Rejected with error code</td>
</tr>
</tbody>
</table>
</div>
<p>The reply is only a single octet. Some defective
implementations of RFC1179 send a LF after the octet, which
makes life very difficult. <b class="APPLICATION">LPRng</b>
makes an effort to detect these non-conforming RFC1179 systems
and will accept jobs from them. However, it will not send jobs
to them.</p>
<p>If <b class="APPLICATION">LPRng</b> sends a reject code, as
an extension to RFC1179 it also sends an error message. Note
that the values for error codes are not defined, nor are their
causes. <b class="APPLICATION">LPRng</b> uses the following
values for error codes, which appear to be compatible with
many, but not all, of the BSD <b class="APPLICATION">lpd</b>
based systems:</p>
<div class="INFORMALTABLE">
<a name="AEN10234" id="AEN10234"></a>
<table border="1" frame="border" rules="all" class=
"CALSTABLE">
<col>
<col>
<thead>
<tr>
<th>Code</th>
<th>Error</th>
</tr>
</thead>
<tbody>
<tr>
<td>\000</td>
<td>Accepted, proceed</td>
</tr>
<tr>
<td>\001</td>
<td>Queue not accepting jobs</td>
</tr>
<tr>
<td>\002</td>
<td>Queue temporarily full, retry later</td>
</tr>
<tr>
<td>\003</td>
<td>Bad job format, do not retry</td>
</tr>
</tbody>
</table>
</div>
<p>When the sender gets the reply indicating success, it sends
the <tt class="LITERAL">nnnn</tt> bytes of the control or data
file, followed by a <tt class="LITERAL">\000</tt> octet. The
receiver will then reply as above; a single <tt class=
"LITERAL">\000</tt> octet indicating success.</p>
<p>The above procedure is carried out until all data files and
the control file of a job are transferred.</p>
<p>RFC1179 is silent on the following issues:</p>
<ol type="1">
<li>
<p>When sending a job, do you send the control file first,
followed by the data file(s), or the data files first?</p>
</li>
<li>
<p>When sending multiple jobs, can you send them on a
single connection, or do you have to establish a new
connection for each job?</p>
</li>
</ol>
<p><b class="APPLICATION">LPRng</b> will <span class=
"emphasis"><i class="EMPHASIS">accept</i></span> jobs whether
they are sent control or data files first. By default, it sends
the control file first, followed by the data file. If the
destination system requires that the data files be sent first,
the <tt class="LITERAL">send_data_first</tt> printcap option
can be used to force data files to be sent first.</p>
<p>RFC1179 states that: <a name="AEN10269" id=
"AEN10269"></a></p>
<blockquote class="BLOCKQUOTE">
<p>The name of the control file ... should start with ASCII
"cfA", followed by a three digit job number, followed by the
host name which has constructed the control file.</p>
</blockquote>
<p>The <span class="emphasis"><i class=
"EMPHASIS">should</i></span> in this wording indicates that
this is simply a guideline, and that other formats are
possible. Some of the major problems with this format are as
follows:</p>
<ol type="1">
<li>
<p>The restriction to 3 digits means that at most 1000 jobs
can be in a queue. Strangely, some systems generate far
more than 1000 jobs a day, and need to archive them on a
regular basis. The <tt class="LITERAL">longnumber</tt>
option will allow <b class="APPLICATION">LPRng</b> to use a
6 digit job number for files in the print queue.</p>
</li>
<li>
<p>The host name format is not specified. Some
implementations consider that this is the short host name,
while others think it is the fully qualified domain name
(FQDN). <b class="APPLICATION">LPRng</b>, by default, will
use the FQDN host name. However, the <tt class=
"LITERAL">use_shorthost</tt> option will force it to use
short host names in control and data files.</p>
</li>
<li>
<p>The <tt class="LITERAL">cfA</tt> control file name was
modified to allow the job priority to be used as the A
letter of the control file. By default, this is A (lowest,
i.e. <tt class="LITERAL">cfA</tt>) and but can range to Z
(highest, i.e. <tt class="LITERAL">cfZ</tt>). All known
spoolers except <b class="APPLICATION">LPRng</b> seem to
ignore the actual value of the letter.</p>
</li>
</ol>
</div>
<div class="NAVFOOTER">
<hr align="left" width="100%">
<table summary="Footer navigation table" width="100%" border=
"0" cellpadding="0" cellspacing="0">
<tr>
<td width="33%" align="left" valign="top"><a href=
"remotesupport.htm" accesskey="P">Prev</a></td>
<td width="34%" align="center" valign="top"><a href=
"index.htm" accesskey="H">Home</a></td>
<td width="33%" align="right" valign="top"><a href=
"x10288.htm" accesskey="N">Next</a></td>
</tr>
<tr>
<td width="33%" align="left" valign="top">Protocol Requests
and Replies</td>
<td width="34%" align="center" valign="top"><a href=
"rfc1179ref.htm" accesskey="U">Up</a></td>
<td width="33%" align="right" valign="top">Data File
Transfer</td>
</tr>
</table>
</div>
<p align="center"></p>
</body>
</html>
|