164 lines
4.2 KiB
HTML
164 lines
4.2 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of FTIME</TITLE>
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</HEAD><BODY>
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<H1>FTIME</H1>
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Section: Linux Programmer's Manual (3)<BR>Updated: 2020-02-09<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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ftime - return date and time
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>#include <<A HREF="file:///usr/include/sys/timeb.h">sys/timeb.h</A>></B>
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<P>
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<B>int ftime(struct timeb *</B><I>tp</I><B>);</B>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<B>NOTE</B>:
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This function is deprecated, and will be removed in a future version of
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the GNU C library.
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Use
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<B><A HREF="/cgi-bin/man/man2html?2+clock_gettime">clock_gettime</A></B>(2)
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instead.
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<P>
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This function returns the current time as seconds and milliseconds
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since the Epoch, 1970-01-01 00:00:00 +0000 (UTC).
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The time is returned in
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<I>tp</I>,
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which is declared as follows:
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<P>
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struct timeb {
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<BR> time_t time;
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<BR> unsigned short millitm;
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<BR> short timezone;
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<BR> short dstflag;
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};
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<P>
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Here <I>time</I> is the number of seconds since the Epoch,
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and <I>millitm</I> is the number of milliseconds since <I>time</I>
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seconds since the Epoch.
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The <I>timezone</I> field is the local timezone measured in minutes
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of time west of Greenwich (with a negative value indicating minutes
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east of Greenwich).
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The <I>dstflag</I> field
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is a flag that, if nonzero, indicates that Daylight Saving time
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applies locally during the appropriate part of the year.
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<P>
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POSIX.1-2001 says that the contents of the <I>timezone</I> and <I>dstflag</I>
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fields are unspecified; avoid relying on them.
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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This function always returns 0.
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(POSIX.1-2001 specifies, and some systems document, a -1 error return.)
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<A NAME="lbAF"> </A>
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<H2>ATTRIBUTES</H2>
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For an explanation of the terms used in this section, see
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<B><A HREF="/cgi-bin/man/man2html?7+attributes">attributes</A></B>(7).
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<TABLE BORDER>
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<TR VALIGN=top><TD><B>Interface</B></TD><TD><B>Attribute</B></TD><TD><B>Value</B><BR></TD></TR>
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<TR VALIGN=top><TD>
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<B>ftime</B>()
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</TD><TD>Thread safety</TD><TD>MT-Safe<BR></TD></TR>
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</TABLE>
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<A NAME="lbAG"> </A>
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<H2>CONFORMING TO</H2>
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4.2BSD, POSIX.1-2001.
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POSIX.1-2008 removes the specification of
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<B>ftime</B>().
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<P>
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This function is obsolete.
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Don't use it.
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If the time in seconds
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suffices,
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<B><A HREF="/cgi-bin/man/man2html?2+time">time</A></B>(2)
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can be used;
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<B><A HREF="/cgi-bin/man/man2html?2+gettimeofday">gettimeofday</A></B>(2)
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gives microseconds;
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<B><A HREF="/cgi-bin/man/man2html?2+clock_gettime">clock_gettime</A></B>(2)
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gives nanoseconds but is not as widely available.
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<A NAME="lbAH"> </A>
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<H2>BUGS</H2>
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<P>
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Early glibc2 is buggy and returns 0 in the
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<I>millitm</I>
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field;
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glibc 2.1.1 is correct again.
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<A NAME="lbAI"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?2+gettimeofday">gettimeofday</A></B>(2),
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<B><A HREF="/cgi-bin/man/man2html?2+time">time</A></B>(2)
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<A NAME="lbAJ"> </A>
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<H2>COLOPHON</H2>
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This page is part of release 5.05 of the Linux
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<I>man-pages</I>
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project.
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A description of the project,
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information about reporting bugs,
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and the latest version of this page,
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can be found at
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<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="3"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="4"><A HREF="#lbAE">RETURN VALUE</A><DD>
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<DT id="5"><A HREF="#lbAF">ATTRIBUTES</A><DD>
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<DT id="6"><A HREF="#lbAG">CONFORMING TO</A><DD>
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<DT id="7"><A HREF="#lbAH">BUGS</A><DD>
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<DT id="8"><A HREF="#lbAI">SEE ALSO</A><DD>
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<DT id="9"><A HREF="#lbAJ">COLOPHON</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:43 GMT, March 31, 2021
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</BODY>
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</HTML>
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