186 lines
4.5 KiB
HTML
186 lines
4.5 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 FUTIMES</TITLE>
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</HEAD><BODY>
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<H1>FUTIMES</H1>
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Section: Linux Programmer's Manual (3)<BR>Updated: 2017-09-15<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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futimes, lutimes - change file timestamps
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<PRE>
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<B>#include <<A HREF="file:///usr/include/sys/time.h">sys/time.h</A>></B>
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<B>int futimes(int </B><I>fd</I><B>, const struct timeval </B><I>tv</I><B>[2]);</B>
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<B>int lutimes(const char *</B><I>filename</I><B>, const struct timeval </B><I>tv</I><B>[2]);</B>
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</PRE>
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<P>
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Feature Test Macro Requirements for glibc (see
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<B><A HREF="/cgi-bin/man/man2html?7+feature_test_macros">feature_test_macros</A></B>(7)):
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<P>
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<B>futimes</B>(),
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<B>lutimes</B>():
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<BR> Since glibc 2.19:
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<BR> _DEFAULT_SOURCE
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<BR> Glibc 2.19 and earlier:
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<BR> _BSD_SOURCE
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<B>futimes</B>()
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changes the access and modification times of a file in the same way as
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<B><A HREF="/cgi-bin/man/man2html?2+utimes">utimes</A></B>(2),
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with the difference that the file whose timestamps are to be changed
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is specified via a file descriptor,
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<I>fd</I>,
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rather than via a pathname.
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<P>
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<B>lutimes</B>()
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changes the access and modification times of a file in the same way as
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<B><A HREF="/cgi-bin/man/man2html?2+utimes">utimes</A></B>(2),
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with the difference that if
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<I>filename</I>
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refers to a symbolic link, then the link is not dereferenced:
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instead, the timestamps of the symbolic link are changed.
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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On success, zero is returned.
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On error, -1 is returned, and
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<I>errno</I>
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is set appropriately.
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<A NAME="lbAF"> </A>
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<H2>ERRORS</H2>
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Errors are as for
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<B><A HREF="/cgi-bin/man/man2html?2+utimes">utimes</A></B>(2),
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with the following additions for
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<B>futimes</B>():
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<DL COMPACT>
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<DT id="1"><B>EBADF</B>
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<DD>
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<I>fd</I>
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is not a valid file descriptor.
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<DT id="2"><B>ENOSYS</B>
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<DD>
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The
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<I>/proc</I>
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filesystem could not be accessed.
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</DL>
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<P>
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The following additional error may occur for
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<B>lutimes</B>():
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<DL COMPACT>
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<DT id="3"><B>ENOSYS</B>
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<DD>
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The kernel does not support this call; Linux 2.6.22 or later is required.
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</DL>
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<A NAME="lbAG"> </A>
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<H2>VERSIONS</H2>
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<B>futimes</B>()
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is available since glibc 2.3.
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<B>lutimes</B>()
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is available since glibc 2.6, and is implemented using the
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<B><A HREF="/cgi-bin/man/man2html?2+utimensat">utimensat</A></B>(2)
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system call, which is supported since kernel 2.6.22.
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<A NAME="lbAH"> </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>futimes</B>(),
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<B>lutimes</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="lbAI"> </A>
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<H2>CONFORMING TO</H2>
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These functions are not specified in any standard.
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Other than Linux, they are available only on the BSDs.
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<A NAME="lbAJ"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?2+utime">utime</A></B>(2),
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<B><A HREF="/cgi-bin/man/man2html?2+utimensat">utimensat</A></B>(2),
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<B><A HREF="/cgi-bin/man/man2html?7+symlink">symlink</A></B>(7)
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<A NAME="lbAK"> </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="4"><A HREF="#lbAB">NAME</A><DD>
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<DT id="5"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="6"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="7"><A HREF="#lbAE">RETURN VALUE</A><DD>
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<DT id="8"><A HREF="#lbAF">ERRORS</A><DD>
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<DT id="9"><A HREF="#lbAG">VERSIONS</A><DD>
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<DT id="10"><A HREF="#lbAH">ATTRIBUTES</A><DD>
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<DT id="11"><A HREF="#lbAI">CONFORMING TO</A><DD>
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<DT id="12"><A HREF="#lbAJ">SEE ALSO</A><DD>
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<DT id="13"><A HREF="#lbAK">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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