149 lines
3.3 KiB
HTML
149 lines
3.3 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 SETLOGMASK</TITLE>
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</HEAD><BODY>
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<H1>SETLOGMASK</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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setlogmask - set log priority mask
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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/syslog.h">syslog.h</A>></B>
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<B>int setlogmask(int </B><I>mask</I><B>);</B>
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</PRE>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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A process has a log priority mask that determines which calls to
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<B><A HREF="/cgi-bin/man/man2html?3+syslog">syslog</A></B>(3)
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may be logged.
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All other calls will be ignored.
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Logging is enabled for the priorities that have the corresponding
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bit set in
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<I>mask</I>.
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The initial mask is such that logging is enabled for all priorities.
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<P>
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The
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<B>setlogmask</B>()
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function sets this logmask for the calling process,
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and returns the previous mask.
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If the mask argument is 0, the current logmask is not modified.
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<P>
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The eight priorities are
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<B>LOG_EMERG</B>,
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<B>LOG_ALERT</B>,
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<B>LOG_CRIT</B>,
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<B>LOG_ERR</B>,
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<B>LOG_WARNING</B>,
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<B>LOG_NOTICE</B>,
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<B>LOG_INFO</B>,
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and
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<B>LOG_DEBUG</B>.
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The bit corresponding to a priority
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<I>p</I>
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is
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<I>LOG_MASK(p)</I>.
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Some systems also provide a macro
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<I>LOG_UPTO(p)</I>
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for the mask
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of all priorities in the above list up to and including
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<I>p</I>.
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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This function returns the previous log priority mask.
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<A NAME="lbAF"> </A>
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<H2>ERRORS</H2>
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None.
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<A NAME="lbAG"> </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>setlogmask</B>()
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</TD><TD>Thread safety</TD><TD>MT-Unsafe race:LogMask<BR></TD></TR>
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</TABLE>
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<P>
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<A NAME="lbAH"> </A>
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<H2>CONFORMING TO</H2>
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POSIX.1-2001, POSIX.1-2008.
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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+closelog">closelog</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+openlog">openlog</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+syslog">syslog</A></B>(3)
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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">ERRORS</A><DD>
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<DT id="6"><A HREF="#lbAG">ATTRIBUTES</A><DD>
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<DT id="7"><A HREF="#lbAH">CONFORMING TO</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: 00:05:56 GMT, March 31, 2021
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