150 lines
3.4 KiB
HTML
150 lines
3.4 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 UPDWTMP</TITLE>
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</HEAD><BODY>
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<H1>UPDWTMP</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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updwtmp, logwtmp - append an entry to the wtmp file
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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/utmp.h">utmp.h</A>></B>
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<B>void updwtmp(const char *</B><I>wtmp_file</I><B>, const struct utmp *</B><I>ut</I><B>);</B>
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<B>void logwtmp(const char *</B><I>line</I><B>, const char *</B><I>name</I><B>, const char *</B><I>host</I><B>);</B>
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</PRE>
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<P>
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For
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<B>logwtmp</B>(),
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link with <I>-lutil</I>.
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<B>updwtmp</B>()
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appends the utmp structure
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<I>ut</I>
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to the wtmp file.
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<P>
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<B>logwtmp</B>()
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constructs a utmp structure using
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<I>line</I>, <I>name</I>, <I>host</I>,
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current time and current process ID.
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Then it calls
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<B>updwtmp</B>()
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to append the structure to the wtmp file.
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<A NAME="lbAE"> </A>
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<H2>FILES</H2>
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<DL COMPACT>
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<DT id="1"><I>/var/log/wtmp</I>
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<DD>
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database of past user logins
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</DL>
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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>updwtmp</B>(),
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<BR>
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<B>logwtmp</B>()
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</TD><TD>Thread safety</TD><TD>MT-Unsafe sig:ALRM timer<BR></TD></TR>
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</TABLE>
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<P>
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<A NAME="lbAG"> </A>
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<H2>CONFORMING TO</H2>
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Not in POSIX.1.
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Present on Solaris, NetBSD, and perhaps other systems.
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<A NAME="lbAH"> </A>
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<H2>NOTES</H2>
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For consistency with the other "utmpx" functions (see
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<B><A HREF="/cgi-bin/man/man2html?3+getutxent">getutxent</A></B>(3)),
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glibc provides (since version 2.1):
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<P>
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<B>#include <<A HREF="file:///usr/include/utmpx.h">utmpx.h</A>></B>
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<B>void updwtmpx (const char *</B><I>wtmpx_file</I><B>, const struct utmpx *</B><I>utx</I><B>);</B>
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<P>
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This function performs the same task as
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<B>updwtmp</B>(),
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but differs in that it takes a
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<I>utmpx</I>
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structure as its last argument.
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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?3+getutxent">getutxent</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?5+wtmp">wtmp</A></B>(5)
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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="2"><A HREF="#lbAB">NAME</A><DD>
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<DT id="3"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="4"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="5"><A HREF="#lbAE">FILES</A><DD>
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<DT id="6"><A HREF="#lbAF">ATTRIBUTES</A><DD>
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<DT id="7"><A HREF="#lbAG">CONFORMING TO</A><DD>
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<DT id="8"><A HREF="#lbAH">NOTES</A><DD>
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<DT id="9"><A HREF="#lbAI">SEE ALSO</A><DD>
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<DT id="10"><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: 00:05:59 GMT, March 31, 2021
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</BODY>
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</HTML>
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