📄 getconf.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>getconf</title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="getconf"></a> <a name="tag_04_61"></a><!-- getconf --> <!--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_61_01"></a>NAME</h4><blockquote>getconf - get configuration values</blockquote><h4><a name="tag_04_61_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><p><code><tt>getconf</tt> <b>[</b> <tt>-v specification</tt> <b>]</b> <i>system_var</i><tt><br><br>getconf</tt> <b>[</b> <tt>-v specification</tt> <b>]</b> <i>path_var pathname</i><tt><br></tt></code></p></blockquote><h4><a name="tag_04_61_03"></a>DESCRIPTION</h4><blockquote><p>In the first synopsis form, the <i>getconf</i> utility shall write to the standard output the value of the variable specified bythe <i>system_var</i> operand.</p><p>In the second synopsis form, the <i>getconf</i> utility shall write to the standard output the value of the variable specifiedby the <i>path_var</i> operand for the path specified by the <i>pathname</i> operand.</p><p>The value of each configuration variable shall be determined as if it were obtained by calling the function from which it isdefined to be available by this volume of IEEE Std 1003.1-2001 or by the System Interfaces volume ofIEEE Std 1003.1-2001 (see the OPERANDS section). The value shall reflect conditions in the current operatingenvironment.</p></blockquote><h4><a name="tag_04_61_04"></a>OPTIONS</h4><blockquote><p>The <i>getconf</i> utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap12.html#tag_12_02">Section 12.2, Utility Syntax Guidelines</a>.</p><p>The following option shall be supported:</p><dl compact><dt><b>-v </b> <i>specification</i></dt><dd>Indicate a specific specification and version for which configuration variables shall be determined. If this option is notspecified, the values returned correspond to an implementation default conforming compilation environment. <p>If the command:</p><pre><tt>getconf _POSIX_V6_ILP32_OFF32</tt></pre><p>does not write <tt>"-1\n"</tt> or <tt>"undefined\n"</tt> to standard output, then commands of the form:</p><pre><tt>getconf -v POSIX_V6_ILP32_OFF32 ...</tt></pre><p>determine values for configuration variables corresponding to the POSIX_V6_ILP32_OFF32 compilation environment specified in <ahref="c99.html"><i>c99</i></a> , the EXTENDED DESCRIPTION.</p><p>If the command:</p><pre><tt>getconf _POSIX_V6_ILP32_OFFBIG</tt></pre><p>does not write <tt>"-1\n"</tt> or <tt>"undefined\n"</tt> to standard output, then commands of the form:</p><pre><tt>getconf -v POSIX_V6_ILP32_OFFBIG ...</tt></pre><p>determine values for configuration variables corresponding to the POSIX_V6_ILP32_OFFBIG compilation environment specified in <ahref="c99.html"><i>c99</i></a> , the EXTENDED DESCRIPTION.</p><p>If the command:</p><pre><tt>getconf _POSIX_V6_LP64_OFF64</tt></pre><p>does not write <tt>"-1\n"</tt> or <tt>"undefined\n"</tt> to standard output, then commands of the form:</p><pre><tt>getconf -v POSIX_V6_LP64_OFF64 ...</tt></pre><p>determine values for configuration variables corresponding to the POSIX_V6_LP64_OFF64 compilation environment specified in <ahref="c99.html"><i>c99</i></a> , the EXTENDED DESCRIPTION.</p><p>If the command:</p><pre><tt>getconf _POSIX_V6_LPBIG_OFFBIG</tt></pre><p>does not write <tt>"-1\n"</tt> or <tt>"undefined\n"</tt> to standard output, then commands of the form:</p><pre><tt>getconf -v POSIX_V6_LPBIG_OFFBIG ...</tt></pre><p>determine values for configuration variables corresponding to the POSIX_V6_LPBIG_OFFBIG compilation environment specified in <ahref="c99.html"><i>c99</i></a> , the EXTENDED DESCRIPTION.</p></dd></dl></blockquote><h4><a name="tag_04_61_05"></a>OPERANDS</h4><blockquote><p>The following operands shall be supported:</p><dl compact><dt><i>path_var</i></dt><dd>A name of a configuration variable. All of the variables in the Variable column of the table in the DESCRIPTION of the <a href="../functions/fpathconf.html"><i>fpathconf</i>()</a> function defined in the System Interfaces volume ofIEEE Std 1003.1-2001, without the enclosing braces, shall be supported. The implementation may add other localvariables.</dd><dt><i>pathname</i></dt><dd>A pathname for which the variable specified by <i>path_var</i> is to be determined.</dd><dt><i>system_var</i></dt><dd>A name of a configuration variable. All of the following variables shall be supported: <ul><li><p>The names in the Variable column of the table in the DESCRIPTION of the <a href="../functions/sysconf.html"><i>sysconf</i>()</a>function in the System Interfaces volume of IEEE Std 1003.1-2001, except for the entries corresponding to _SC_CLK_TCK,_SC_GETGR_R_SIZE_MAX, and _SC_GETPW_R_SIZE_MAX, without the enclosing braces.</p><p>For compatibility with earlier versions, the following variable names shall also be supported:</p><blockquote><pre>POSIX2_C_BINDPOSIX2_C_DEVPOSIX2_CHAR_TERMPOSIX2_FORT_DEVPOSIX2_FORT_RUNPOSIX2_LOCALEDEFPOSIX2_SW_DEVPOSIX2_UPEPOSIX2_VERSION</pre></blockquote><p>and shall be equivalent to the same name prefixed with an underscore. This requirement may be removed in a future version.</p></li><li><p>The names of the symbolic constants used as the <i>name</i> argument of the <a href="../functions/confstr.html"><i>confstr</i>()</a> function in the System Interfaces volume of IEEE Std 1003.1-2001,without the _CS_ prefix.</p></li><li><p>The names of the symbolic constants listed under the headings ``Maximum Values'' and ``Minimum Values'' in the description ofthe <a href="../basedefs/limits.h.html"><i><limits.h></i></a> header in the Base Definitions volume ofIEEE Std 1003.1-2001, without the enclosing braces.</p><p>For compatibility with earlier versions, the following variable names shall also be supported:</p><blockquote><pre>POSIX2_BC_BASE_MAXPOSIX2_BC_DIM_MAXPOSIX2_BC_SCALE_MAXPOSIX2_BC_STRING_MAXPOSIX2_COLL_WEIGHTS_MAXPOSIX2_EXPR_NEST_MAXPOSIX2_LINE_MAXPOSIX2_RE_DUP_MAX</pre></blockquote><p>and shall be equivalent to the same name prefixed with an underscore. This requirement may be removed in a future version.</p></li></ul><p>The implementation may add other local values.</p></dd></dl></blockquote><h4><a name="tag_04_61_06"></a>STDIN</h4><blockquote><p>Not used.</p></blockquote><h4><a name="tag_04_61_07"></a>INPUT FILES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_61_08"></a>ENVIRONMENT VARIABLES</h4><blockquote><p>The following environment variables shall affect the execution of <i>getconf</i>:</p><dl compact><dt><i>LANG</i></dt><dd>Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume ofIEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap08.html#tag_08_02">Section 8.2, Internationalization Variables</a> forthe precedence of internationalization variables used to determine the values of locale categories.)</dd><dt><i>LC_ALL</i></dt><dd>If set to a non-empty string value, override the values of all the other internationalization variables.</dd><dt><i>LC_CTYPE</i></dt><dd>Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte asopposed to multi-byte characters in arguments).</dd><dt><i>LC_MESSAGES</i></dt><dd>Determine the locale that should be used to affect the format and contents of diagnostic messages written to standarderror.</dd><dt><i>NLSPATH</i></dt>⌨️ 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 + -