📄 wordexp.h.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title><wordexp.h></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_000_010_785"> </a>NAME</h4><blockquote>wordexp.h - word-expansion types</blockquote><h4><a name = "tag_000_010_786"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <wordexp.h></code></pre></blockquote><h4><a name = "tag_000_010_787"> </a>DESCRIPTION</h4><blockquote>The<i><wordexp.h></i>header defines the structures and symbolic constants used by the<i><a href="wordexp.html">wordexp()</a></i>and<i><a href="wordexp.html">wordfree()</a></i>functions.<p>The structure type<b>wordexp_t</b>contains at least the following members:<pre><code>size_t we_wordc count of words matched by <i>words</i>char **we_wordv pointer to list of expanded words size_t we_offs slots to reserve at the beginning of <i>we_wordv</i></code></pre><p>The<i>flags</i>argumentto the<i><a href="wordexp.html">wordexp()</a></i>function is the bitwise inclusive OR of the followingflags:<dl compact><dt>WRDE_APPEND<dd>Append words to those previously generated.<dt>WRDE_DOOFFS<dd>Number of nullpointers to prepend to<i>we_wordv</i>.<dt>WRDE_NOCMD<dd>Fail if command substitution is requested.<dt>WRDE_REUSE<dd>The<i>pwordexp</i>argument was passed to a previous successful call to<i><a href="wordexp.html">wordexp()</a></i>,and has not been passed to<i><a href="wordexp.html">wordfree()</a></i>.The result will be the same as if the application hadcalled<i><a href="wordexp.html">wordfree()</a></i>and then called<i><a href="wordexp.html">wordexp()</a></i>without WRDE_REUSE.<dt>WRDE_SHOWERR<dd>Do not redirect<i>stderr</i>to<dt>WRDE_UNDEF<dd>Report error on an attempt to expand an undefined shell variable.</dl><p>The following constants are defined as error return values:<dl compact><dt>WRDE_BADCHAR<dd>One of the unquoted characters:<pre><code><newline> | & ; < > ( ) { }</code></pre>appears in<i>words</i>in an inappropriate context.<dt>WRDE_BADVAL<dd>Reference to undefined shell variable when WRDE_UNDEF is set in<i>flags</i>.<dt>WRDE_CMDSUB<dd>Command substitution requested when WRDE_NOCMD was set in flags.<dt>WRDE_NOSPACE<dd>Attempt to allocate memory failed.<dt>WRDE_NOSYS<dd>The implementation does not support the function.<dt>WRDE_SYNTAX<dd>Shell syntax error, such as unbalancedparentheses or unterminated string.</dl><p>The following are declared as functions and may also be declared as macros.Function prototypes must be provided for use with an ISO Ccompiler.<pre><code>int <a href="wordexp.html">wordexp</a>(const char *, wordexp_t *, int);void <a href="wordfree.html">wordfree</a>(wordexp_t *);</code></pre><p>The implementation may define additional macros orconstants using names beginning with WRDE_.</blockquote><h4><a name = "tag_000_010_788"> </a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_789"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_790"> </a>SEE ALSO</h4><blockquote><i><a href="wordexp.html">wordexp()</a></i>,the <b>XCU</b> specification.<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
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 + -