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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>lp</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_001_014_1251"> </a>NAME</h4><blockquote>lp - send files to a printer</blockquote><h4><a name = "tag_001_014_1252"> </a>SYNOPSIS</h4><blockquote><pre><code>lp <b>[</b>-c<b>][</b>-d <i>dest</i><b>][</b>-n <i>copies</i><b>][</b>-msw<b>][</b>-o <i>option</i><b>]</b>... <b>[</b>-t <i>title</i><b>][</b><i>file</i>...<b>]</b></code></pre></blockquote><h4><a name = "tag_001_014_1253"> </a>DESCRIPTION</h4><blockquote>The<i>lp</i>utility copies the input files to an output destinationin an unspecified manner.The default output destination should be to a hardcopy device, suchas a printer or microfilm recorder, that produces non-volatile,human-readable documents.If such a device is not available to the application,or if the system provides no such device, the<i>lp</i>utilitywill exit with a non-zero exit status.<p>The actual writing to the output device may occur sometime after the<i>lp</i>utility successfully exits.During the portion of the writing that correspondsto each input file, the implementationguarantees exclusive access to the device.<p>The<i>lp</i>utility associates a unique<i>request ID</i>with each request.<p>Normally, a banner page is produced to separate and identify each print job.This page may be suppressed by implementation-dependent conditions,such as an operator command or one of the<b>-o</b> <i>option</i>values.</blockquote><h4><a name = "tag_001_014_1254"> </a>OPTIONS</h4><blockquote>The<i>lp</i>utility supports the <b>XBD</b> specification, <a href="../xbd/utilconv.html#usg"><b>Utility Syntax Guidelines</b> </a> .<p>The following options are supported:<dl compact><dt><b>-c</b><dd>Exit only after further access to any of the input filesis no longer required.The application can then safely delete or modify the fileswithout affecting the output operation.Normally,files will not be copied, but will be linked whenever possible.If the<b>-c</b>option is not given, then the user should be carefulnot to remove any of the filesbefore the request has been printed in its entirety.It should also be noted that in the absence of the<b>-c</b>option, any changes made to the named filesafter the request is made but before it is printedwill be reflected in the printed output.On some systems,<b>-c</b>may be on by default.<dt><b>-d </b><i>dest</i><dd>Specify a string that names the destination (dest).If<i>dest</i>is a printer, the request will be printed onlyon that specific printer.If<i>dest</i>is a class of printers, the request will be printedon the first available printer that is a member of the class.Under certain conditions (printer unavailability,file space limitation, and so on), requests forspecific destinations need not be accepted; see<i><a href="lpstat.html">lpstat</a></i>.Destination names vary between systems; see<i><a href="lpstat.html">lpstat</a></i>.If<b>-d</b>is not specified, and neither the<i>LPDEST</i>nor<i>PRINTER</i>environment variable is set, an unspecified destination is used.The<b>-d</b> <i>dest</i>option takes precedence over<i>LPDEST ,</i>which in turn takes precedence over<i>PRINTER .</i>Results are undefined when<i>dest</i>contains a value that is not a valid destination name.<dt><b>-m</b><dd>Send mail (see<i><a href="mailx.html">mailx</a></i>)after the files have been printed.By default, no mail is sent upon normal completionof the print request.<dt><b>-n </b><i>copies</i><dd>Write<i>copies</i>number of copies of the files, where<i>copies</i>is a positive decimal integer.The methods for producing multiple copies and for arrangingthe multiple copies when multiple<i>file</i>operands are used are unspecified, exceptthat each file will be output as an integralwhole, not interleaved with portions of other files.<dt><b>-o </b><i>option</i><dd>Specify printer-dependent or class-dependent<i>option</i>s.Several such<i>option</i>smay be collected by specifying the<b>-o</b>option more than once.<dt><b>-s</b><dd>Suppress messages from<i>lp</i>such as "request id is ...".<dt><b>-t </b><i>title</i><dd>Write<i>title</i>on the banner page of the output.<dt><b>-w</b><dd>Write a message on the user's terminal after thefiles have been printed.If the user is not logged in, then mail will be sent instead.</dl></blockquote><h4><a name = "tag_001_014_1255"> </a>OPERANDS</h4><blockquote>The following operand is supported:<dl compact><dt><i>file</i><dd>A pathname of a file to be output.If no<i>file</i>operands are specified,or if a<i>file</i>operand is "-", the standard input will be used.If a<i>file</i>operand is used, but the<b>-c</b>option is not specified, the process performing the writingto the output device may have user and group permissionsthat differ from that of the process invoking<i>lp</i>.</dl></blockquote><h4><a name = "tag_001_014_1256"> </a>STDIN</h4><blockquote>The standard input will be used only if no<i>file</i>operands are specified,or if a<i>file</i>operand is "-".See the INPUT FILES section.</blockquote><h4><a name = "tag_001_014_1257"> </a>INPUT FILES</h4><blockquote>The input files must be text files.</blockquote><h4><a name = "tag_001_014_1258"> </a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>lp</i>:<dl compact><dt><i>LANG</i><dd>Provide a default value for the internationalisation variablesthat are unset or null.If<i>LANG</i>is unset or null, the corresponding value from theimplementation-dependent default locale will be used.If any of the internationalisation variables contains an invalid setting, theutility will behave as if none of the variables had been defined.<dt><i>LC_ALL</i><dd>If set to a non-empty string value,override the values of all the other internationalisation variables.<dt><i>LC_CTYPE</i><dd>Determine thelocale for the interpretation of sequences of bytes of text data ascharacters (for example, single- as opposed to multi-byte charactersin arguments and input files).<dt><i>LC_MESSAGES</i><dd>Determine the locale that should be used to affectthe format and contents of diagnosticmessages written to standard errorand informative messages written to standard output.<dt><i>LC_TIME</i><dd>Determine the format and contents of date andtime strings displayed in the<i>lp</i>banner page, if any.<dt><i>LPDEST</i><dd>Determine the destination.If the<i>LPDEST</i>environment variable is not set,the<i>PRINTER</i>environment variable will be used.The<b>-d</b> <i>dest</i>option takes precedence over<i>LPDEST .</i>Results are undefined when<b>-d</b>is not specified and<i>LPDEST</i>contains a value that is not a valid destination name.<dt><i>NLSPATH</i><dd>Determine the location of message cataloguesfor the processing of<i>LC_MESSAGES .</i><dt><i>PRINTER</i><dd>Determine the output device or destination.If the<i>LPDEST</i>and<i>PRINTER</i>environment variables are notset, an unspecified output device is used.The<b>-d</b> <i>dest</i>option and the<i>LPDEST</i>environment variable takes precedence over<i>PRINTER .</i>Results are undefined when<b>-d</b>is not specified,<i>LPDEST</i>is unset, and<i>PRINTER</i>contains a value that is not a valid device or destination name.</dl></blockquote><h4><a name = "tag_001_014_1259"> </a>ASYNCHRONOUS EVENTS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1260"> </a>STDOUT</h4><blockquote>The<i>lp</i>utilitywrites a<i>request ID</i>to the standard output, unless<b>-s</b>is specified.The format of the message is unspecified.This<i>request ID</i>can be used later to cancel (see<i><a href="cancel.html">cancel</a></i>)or find the status (see<i><a href="lpstat.html">lpstat</a></i>)of the request.</blockquote><h4><a name = "tag_001_014_1261"> </a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_1262"> </a>OUTPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1263"> </a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1264"> </a>EXIT STATUS</h4><blockquote>The following exit values are returned:<dl compact><dt>0<dd>All input files were processed successfully.<dt>>0<dd>No output device was available, or an error occurred.</dl></blockquote><h4><a name = "tag_001_014_1265"> </a>CONSEQUENCES OF ERRORS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1266"> </a>APPLICATION USAGE</h4><blockquote>The<i><a href="pr.html">pr</a></i>and<i><a href="fold.html">fold</a></i>utilities can be used to achieve reasonable formattingfor the implementation's default page size.<p>A portable application can use one of the<i>file</i>operands only with the<b>-c</b>option or if the file is publicly readableand guaranteed to be available at the time of printing.This is because the standard gives the implementation thefreedom to queue up the request for printing at somelater time by a different process that might not be ableto access the file.</blockquote><h4><a name = "tag_001_014_1267"> </a>EXAMPLES</h4><blockquote><ol><p><li>To print file<i>file</i>:<pre><code>lp -c file</code></pre><p><li>To print multiple files with headers:<pre><code>pr file1 file2 | lp</code></pre><p></ol></blockquote><h4><a name = "tag_001_014_1268"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1269"> </a>SEE ALSO</h4><blockquote><i><a href="lpstat.html">lpstat</a></i>,<i><a href="mailx.html">mailx</a></i>.<br></blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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