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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::filesystem::</span>hard_link_count</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-filesystem.html">filesystem</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-filesystem.html">&lt;filesystem&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><a href="cpp-types-integer.html"><span class="kw132">std::<span class="me2">uintmax_t</span></span></a> hard_link_count<span class="br0">(</span> <span class="kw4">const</span> <a href="cpp-filesystem-path.html"><span class="kw2199">std::<span class="me2">filesystem</span><span class="sy4">::</span><span class="me2">path</span></span></a><span class="sy3">&amp;</span> p <span class="br0">)</span><span class="sy4">;</span><br />
<a href="cpp-types-integer.html"><span class="kw132">std::<span class="me2">uintmax_t</span></span></a> hard_link_count<span class="br0">(</span> <span class="kw4">const</span> <a href="cpp-filesystem-path.html"><span class="kw2199">std::<span class="me2">filesystem</span><span class="sy4">::</span><span class="me2">path</span></span></a><span class="sy3">&amp;</span> p, <a href="cpp-error-error_code.html"><span class="kw877">std::<span class="me2">error_code</span></span></a><span class="sy3">&amp;</span> ec <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></td>
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<p>&#36820;&#22238;&#36335;&#24452; <code>p</code> &#25152;&#26631;&#35782;&#30340;&#25991;&#20214;&#31995;&#32479;&#23545;&#35937;&#30340;&#30828;&#38142;&#25509;&#25968;&#12290;</p>
<p>&#38750;&#25243;&#20986;&#37325;&#36733;&#22312;&#38169;&#35823;&#26102;&#36820;&#22238; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">static_cast</span><span class="sy1">&lt;</span>uintmax_t<span class="sy1">&gt;</span><span class="br0">(</span><span class="sy2">-</span><span class="nu0">1</span><span class="br0">)</span></span></span> &#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>p</td>
<td>-</td>
<td>&#35201;&#26816;&#27979;&#30340;&#36335;&#24452;</td>
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<td>ec</td>
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<td>&#38750;&#25243;&#20986;&#37325;&#36733;&#20013;&#25253;&#21578;&#38169;&#35823;&#30340;&#36755;&#20986;&#21442;&#25968;</td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p><code>p</code> &#30340;&#30828;&#38142;&#25509;&#25968;</p>
<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">&#24322;&#24120;</span></h3>
<p>&#19981;&#25509;&#21463; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-error-error_code.html"><span class="kw877">std::<span class="me2">error_code</span></span></a><span class="sy3">&amp;</span></span></span> &#21442;&#25968;&#30340;&#37325;&#36733;&#22312;&#24213;&#23618; OS API &#38169;&#35823;&#26102;&#25243;&#20986; <a href="cpp-filesystem-filesystem_error.html"><tt>filesystem_error</tt></a> &#65292;&#20197;&#31532;&#19968; path &#21442;&#25968; <code>p</code> &#21644;&#20316;&#20026;&#38169;&#35823;&#30721;&#21442;&#25968;&#30340; OS &#38169;&#35823;&#30721;&#26500;&#36896;&#12290;&#33509; OS API &#35843;&#29992;&#22833;&#36133;&#65292;&#21017;&#25509;&#21463; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-error-error_code.html"><span class="kw877">std::<span class="me2">error_code</span></span></a><span class="sy3">&amp;</span></span></span> &#21442;&#25968;&#30340;&#37325;&#36733;&#35774;&#32622;&#35813;&#21442;&#25968;&#20026; OS API &#38169;&#35823;&#30721;&#65292;&#32780;&#33509;&#19981;&#20986;&#29616;&#38169;&#35823;&#21017;&#25191;&#34892; <span class="t-c"><span class="mw-geshi cpp source-cpp">ec.<span class="me1">clear</span><span class="br0">(</span><span class="br0">)</span></span></span> &#12290;&#33509;&#20869;&#23384;&#20998;&#37197;&#22833;&#36133;&#65292;&#21017;&#20219;&#20309;&#19981;&#26631;&#35760;&#20026; <code>noexcept</code> &#30340;&#37325;&#36733;&#21487;&#33021;&#25243;&#20986; <span class="t-lc"><a href="cpp-memory-new-bad_alloc.html">std::bad_alloc</a></span> &#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;filesystem&gt;</span>
<span class="kw1">namespace</span> fs <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">filesystem</span><span class="sy4">;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="co1">// &#22312; POSIX &#39118;&#26684;&#25991;&#20214;&#31995;&#32479;&#19978;&#65292;&#27599;&#20010;&#30446;&#24405;&#33267;&#23569;&#26377; 2 &#20010;&#30828;&#38142;&#25509;&#65306;</span>
<span class="co1">// &#20854;&#33258;&#36523;&#19982;&#29305;&#27530;&#25104;&#21592;&#21517; &quot;.&quot;</span>
fs<span class="sy4">::</span><span class="me2">path</span> p <span class="sy1">=</span> fs<span class="sy4">::</span><span class="me2">current_path</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;Number of hard links for current path is &quot;</span>
<span class="sy1">&lt;&lt;</span> fs<span class="sy4">::</span><span class="me2">hard_link_count</span><span class="br0">(</span>p<span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<span class="co1">// &#27599;&#20010; &quot;..&quot; &#26159;&#21040;&#20146;&#30446;&#24405;&#30340;&#24212;&#35845;&#35299;&#65292;&#25925;&#23545;&#20219;&#20309;&#30446;&#24405;&#30340;&#30828;&#38142;&#25509;&#32508;&#36848;&#26159; 2 &#21152;&#19978;&#30452;&#25509;&#23376;&#30446;&#24405;&#25968;</span>
p <span class="sy1">=</span> fs<span class="sy4">::</span><span class="me2">current_path</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">/</span> <span class="st0">&quot;..&quot;</span><span class="sy4">;</span> <span class="co1">// &#27599;&#20010;&#21452;&#28857;&#26159;&#21040;&#20146;&#30446;&#24405;&#30340;&#30828;&#38142;&#25509;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;Number of hard links for .. is &quot;</span>
<span class="sy1">&lt;&lt;</span> fs<span class="sy4">::</span><span class="me2">hard_link_count</span><span class="br0">(</span>p<span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<p>&#21487;&#33021;&#30340;&#36755;&#20986;&#65306;</p>
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<pre class="de1">Number of hard links for current path is 2
Number of hard links for .. is 3</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-filesystem-create_hard_link.html"><span class="t-lines"><span>create_hard_link</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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<td>&#21019;&#24314;&#19968;&#20010;&#30828;&#38142;&#25509;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<div><a href="cpp-filesystem-directory_entry-hard_link_count.html"><span class="t-lines"><span>hard_link_count</span></span></a></div>
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<td>&#36820;&#22238;&#24341;&#29992;&#21040;&#35813; directory_entry &#25152;&#34920;&#31034;&#30340;&#25991;&#20214;&#30340;&#30828;&#38142;&#25509;&#25968;<br />
<span class="t-mark">(<code>std::filesystem::directory_entry</code> &#30340;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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