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<p id="mwBQ">Nei linguaggi di programmazione <a rel="mw:WikiLink" href="C" title="C" id="mwBg">C</a> e <a rel="mw:WikiLink" href="C%2B%2B" title="C++" id="mwBw">C++</a>, <b id="mwCA">unistd.h</b> è il <a rel="mw:WikiLink" href="Header_file" title="Header file" class="mw-redirect" id="mwCQ">file header</a> che consente l'accesso alle <a rel="mw:WikiLink" href="Application_programming_interface" title="Application programming interface" id="mwCg">API</a> dello standard <a rel="mw:WikiLink" href="POSIX" title="POSIX" id="mwCw">POSIX</a>.
Nei sistemi operativi <a rel="mw:WikiLink" href="Unix-like" title="Unix-like" id="mwDA">Unix-like</a>, l'interfaccia unistd.h contiene funzioni <a rel="mw:WikiLink" href="Wrapper" title="Wrapper" id="mwDQ">wrapper</a> delle <a rel="mw:WikiLink" href="Chiamata_di_sistema" title="Chiamata di sistema" id="mwDg">chiamate di sistema</a> basilari del sistema operativo, come <a rel="mw:WikiLink" href="Fork_(programmazione)" title="Fork (programmazione)" id="mwDw">fork</a>, <a rel="mw:WikiLink" href="Pipe_(informatica)" title="Pipe (informatica)" id="mwEA">pipe</a> e primitive <a rel="mw:WikiLink" href="I/O" title="I/O" class="mw-redirect" id="mwEQ">I/O</a> (read, write, close etc.).</p>

<p id="mwEg">Alcuni ambienti particolari come <a rel="mw:WikiLink" href="Cygwin" title="Cygwin" id="mwEw">Cygwin</a> e <a rel="mw:WikiLink" href="MinGW" title="MinGW" id="mwFA">MinGW</a> hanno una loro versione di unistd.h, in modo da renderlo compatibile con altri sistemi operativi come <a rel="mw:WikiLink" href="Windows" title="Windows" class="mw-redirect" id="mwFQ">Windows</a>.</p>

</section><section data-mw-section-id="1" id="mwFg" aria-labelledby="Collegamenti_esterni"><div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2></div>
<ul id="mwFw"><li id="mwGA"><span typeof="mw:Transclusion" id="mwGQ">(</span><span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span><span>) </span> <a rel="mw:ExtLink nofollow" href="http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html" class="external text" id="mwGg">unistd.h</a> da The Open Group Base Specifications Issue 7</li></ul>



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