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96 lines
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96 lines
3.8 KiB
HTML
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<title>gmtime (The Red Hat newlib C Library)</title>
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<a name="gmtime"></a>
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<p>
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Next: <a href="localtime.html#localtime" accesskey="n" rel="next">localtime</a>, Previous: <a href="difftime.html#difftime" accesskey="p" rel="prev">difftime</a>, Up: <a href="Timefns.html#Timefns" accesskey="u" rel="up">Timefns</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
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<a name="gmtime_002d_002d_002dconvert-time-to-UTC-traditional-form"></a>
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<h3 class="section">8.5 <code>gmtime</code>—convert time to UTC traditional form</h3>
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<a name="index-gmtime"></a>
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<a name="index-gmtime_005fr"></a>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <time.h>
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struct tm *gmtime(const time_t *<var>clock</var>);
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struct tm *gmtime_r(const time_t *<var>clock</var>, struct tm *<var>res</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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<code>gmtime</code> takes the time at <var>clock</var> representing the number
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of elapsed seconds since 00:00:00 on January 1, 1970, Universal
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Coordinated Time (UTC, also known in some countries as GMT,
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Greenwich Mean time) and converts it to a <code>struct tm</code>
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representation.
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</p>
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<p><code>gmtime</code> constructs the traditional time representation in static
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storage; each call to <code>gmtime</code> or <code>localtime</code> will overwrite the
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information generated by previous calls to either function.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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A pointer to the traditional time representation (<code>struct tm</code>).
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</p>
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<br>
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<p><strong>Portability</strong><br>
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ANSI C requires <code>gmtime</code>.
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</p>
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<p><code>gmtime</code> requires no supporting OS subroutines.
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