📄 dot.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta name="generator" content="HTML Tidy, see www.w3.org"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 --><!-- Copyright (c) 2001-2004 IEEE and The Open Group, All Rights Reserved --><title>dot</title></head><body bgcolor="white"><basefont size="3"> <a name="dot"></a> <a name="tag_04_39"></a><!-- dot --> <!--header start--><center><font size="2">The Open Group Base Specifications Issue 6<br>IEEE Std 1003.1, 2004 Edition<br>Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.</font></center><!--header end--><hr size="2" noshade><h4><a name="tag_04_39_01"></a>NAME</h4><blockquote>dot - execute commands in the current environment</blockquote><h4><a name="tag_04_39_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><p><code><tt>.</tt> <i>file</i></code></p></blockquote><h4><a name="tag_04_39_03"></a>DESCRIPTION</h4><blockquote><p>The shell shall execute commands from the <i>file</i> in the current environment.</p><p>If <i>file</i> does not contain a slash, the shell shall use the search path specified by <i>PATH</i> to find the directorycontaining <i>file</i>. Unlike normal command search, however, the file searched for by the <i>dot</i> utility need not beexecutable. If no readable file is found, a non-interactive shell shall abort; an interactive shell shall write a diagnosticmessage to standard error, but this condition shall not be considered a syntax error.</p></blockquote><h4><a name="tag_04_39_04"></a>OPTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_39_05"></a>OPERANDS</h4><blockquote><p>See the DESCRIPTION.</p></blockquote><h4><a name="tag_04_39_06"></a>STDIN</h4><blockquote><p>Not used.</p></blockquote><h4><a name="tag_04_39_07"></a>INPUT FILES</h4><blockquote><p>See the DESCRIPTION.</p></blockquote><h4><a name="tag_04_39_08"></a>ENVIRONMENT VARIABLES</h4><blockquote><p>See the DESCRIPTION.</p></blockquote><h4><a name="tag_04_39_09"></a>ASYNCHRONOUS EVENTS</h4><blockquote><p>Default.</p></blockquote><h4><a name="tag_04_39_10"></a>STDOUT</h4><blockquote><p>Not used.</p></blockquote><h4><a name="tag_04_39_11"></a>STDERR</h4><blockquote><p>The standard error shall be used only for diagnostic messages.</p></blockquote><h4><a name="tag_04_39_12"></a>OUTPUT FILES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_39_13"></a>EXTENDED DESCRIPTION</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_39_14"></a>EXIT STATUS</h4><blockquote><p>Returns the value of the last command executed, or a zero exit status if no command is executed.</p></blockquote><h4><a name="tag_04_39_15"></a>CONSEQUENCES OF ERRORS</h4><blockquote><p>Default.</p></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_04_39_16"></a>APPLICATION USAGE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_39_17"></a>EXAMPLES</h4><blockquote><pre><tt>cat foobar</tt><b>foo=hello bar=world</b><tt>. foobarecho $foo $bar</tt><b>hello world</b></pre></blockquote><h4><a name="tag_04_39_18"></a>RATIONALE</h4><blockquote><p>Some older implementations searched the current directory for the <i>file</i>, even if the value of <i>PATH</i> disallowed it.This behavior was omitted from this volume of IEEE Std 1003.1-2001 due to concerns about introducing the susceptibilityto trojan horses that the user might be trying to avoid by leaving <b>dot</b> out of <i>PATH .</i></p><p>The KornShell version of <i>dot</i> takes optional arguments that are set to the positional parameters. This is a validextension that allows a <i>dot</i> script to behave identically to a function.</p></blockquote><h4><a name="tag_04_39_19"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_39_20"></a>SEE ALSO</h4><blockquote><p><a href="xcu_chap02.html#tag_02_14"><i>Special Built-In Utilities</i></a></p></blockquote><h4><a name="tag_04_39_21"></a>CHANGE HISTORY</h4><h4><a name="tag_04_39_22"></a>Issue 6</h4><blockquote><p>IEEE Std 1003.1-2001/Cor 1-2002, item XCU/TC1/D6/5 is applied so that the reference page sections use terms asdescribed in the Utility Description Defaults ( <a href="xcu_chap01.html#tag_01_11"><i>Utility Description Defaults</i></a> ). Nochange in behavior is intended.</p></blockquote><div class="box"><em>End of informative text.</em></div><hr size="2" noshade><center><font size="2"><!--footer start-->UNIX ® is a registered Trademark of The Open Group.<br>POSIX ® is a registered Trademark of The IEEE.<br>[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href="../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>]</font></center><!--footer end--><hr size="2" noshade></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -