142 lines
3.2 KiB
HTML
142 lines
3.2 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 SD_BUS_SLOT_SET_DESCRIPTION</TITLE>
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</HEAD><BODY>
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<H1>SD_BUS_SLOT_SET_DESCRIPTION</H1>
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Section: sd_bus_slot_set_description (3)<BR>Updated: <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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sd_bus_slot_set_description, sd_bus_slot_get_description - Set or query the description of bus slot objects
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<P>
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<B>
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</B><PRE>
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#include <<A HREF="file:///usr/include/systemd/sd-bus.h">systemd/sd-bus.h</A>>
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</PRE>
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<DL COMPACT>
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<DT id="1">
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<B>int sd_bus_slot_set_description(sd_bus_slot* </B><I>slot</I><B>, const char *</B><I>description</I><B>);</B>
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<DT id="2">
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<B>int sd_bus_slot_get_description(sd_bus_slot* </B><I>bus</I><B>, const char **</B><I>description</I><B>);</B>
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</DL>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<P>
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<B>sd_bus_slot_set_description()</B>
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<DD>sets the description string that is used in logging to the specified string. The string is copied internally and freed when the bus slot object is deallocated. The
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<I>description</I>
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argument may be
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<B>NULL</B>, in which case the description is unset.
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<P>
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<B>sd_bus_slot_get_description()</B>
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returns a description string in
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<I>description</I>. If the string is not set, e.g. with
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<B>sd_bus_slot_set_description()</B>, and the slot is a bus match callback slot, the match string will be returned. Otherwise,
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<B>-ENXIO</B>
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is returned.
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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<P>
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On success, these functions return 0 or a positive integer. On failure, they return a negative errno-style error code.
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<A NAME="lbAF"> </A>
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<H3>Errors</H3>
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<P>
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Returned errors may indicate the following problems:
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<P>
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<B>-EINVAL</B>
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<DL COMPACT><DT id="3"><DD>
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An required argument is
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<B>NULL</B>.
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</DL>
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<P>
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<B>-ENXIO</B>
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<DL COMPACT><DT id="4"><DD>
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The bus slot object has no description.
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</DL>
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<P>
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<B>-ENOMEM</B>
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<DL COMPACT><DT id="5"><DD>
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Memory allocation failed.
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</DL>
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<A NAME="lbAG"> </A>
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<H2>NOTES</H2>
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<P>
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These APIs are implemented as a shared library, which can be compiled and linked to with the
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<B>libsystemd</B> <B><A HREF="/cgi-bin/man/man2html?1+pkg-config">pkg-config</A></B>(1)
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file.
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<A NAME="lbAH"> </A>
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<H2>SEE ALSO</H2>
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<P>
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<B><A HREF="/cgi-bin/man/man2html?1+systemd">systemd</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?3+sd-bus">sd-bus</A></B>(3)
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<B><A HREF="/cgi-bin/man/man2html?3+sd_bus_slot_ref">sd_bus_slot_ref</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+sd_bus_slot_set_userdata">sd_bus_slot_set_userdata</A></B>(3)
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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="6"><A HREF="#lbAB">NAME</A><DD>
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<DT id="7"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="8"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="9"><A HREF="#lbAE">RETURN VALUE</A><DD>
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<DL>
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<DT id="10"><A HREF="#lbAF">Errors</A><DD>
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</DL>
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<DT id="11"><A HREF="#lbAG">NOTES</A><DD>
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<DT id="12"><A HREF="#lbAH">SEE ALSO</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: 00:05:55 GMT, March 31, 2021
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