44 lines
2.0 KiB
HTML
44 lines
2.0 KiB
HTML
<html><!-- This HTML file has been created by texi2html 1.29
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from syscalls.texi on 4 June 1994 -->
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<TITLE>Syscall specifications of Linux - gettimeofday</TITLE>
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<P>Go to the <A HREF="syscalls_88.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_88.html">previous</A>, <A HREF="syscalls_90.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_90.html">next</A> section.<P>
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<H2><A NAME="SEC89" HREF="syscalls_toc.html#SEC89" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_toc.html#SEC89">gettimeofday and settimeofday</A></H2>
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<P>
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<H3>SYNOPSIS</H3>
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<P>
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<CODE>int gettimeofday(struct timeval *<VAR>tv</VAR>, struct timezone *<VAR>tz</VAR>);</CODE>
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<P>
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<CODE>int settimeofday(const struct timeval *<VAR>tv</VAR>, const struct
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timezone *<VAR>tz</VAR>);</CODE>
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<P>
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<H3>PARAMETERS</H3>
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<P>
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<VAR>tv</VAR>: for <CODE>gettimeofday</CODE>, [out] points to a buffer that will
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contain the time. For <CODE>settimeofday</CODE>, [in] points to a buffer
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containing the new time.
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<P>
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<VAR>tz</VAR>: for <CODE>gettimeofday</CODE>, [out] points to a buffer that will
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contain the timezone information. For <CODE>settimeofday</CODE>, [in] points
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to a buffer containing the new timezone information.
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<P>
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<H3>DESCRIPTION</H3>
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<P>
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<CODE>gettimeofday</CODE> retreives the current time and timezone information.
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<CODE>settimeofday</CODE> sets the current time and timezone information. Only
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the superuser may call <CODE>settimeofday</CODE>. A value of <CODE>NULL</CODE> for a
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parameter of <CODE>settimeofday</CODE> specifies not to change this parameter.
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<P>
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<H3>RETURN VALUE</H3>
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<P>
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On success zero is returned. On error -1 is returned and <CODE>errno</CODE> is
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set to one of the following values:
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<P>
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<UL>
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<LI><CODE>EPERM</CODE>: <CODE>settimeofday</CODE> was called but the task has not
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superuser privileges.
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<LI><CODE>EINVAL</CODE>.
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</UL>
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<P>
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<P>Go to the <A HREF="syscalls_88.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_88.html">previous</A>, <A HREF="syscalls_90.html" tppabs="http://www.infran.ru/TechInfo/syscalls/syscalls_90.html">next</A> section.<P>
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