87 lines
2.1 KiB
HTML
87 lines
2.1 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 ON_AC_POWER</TITLE>
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</HEAD><BODY>
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<H1>ON_AC_POWER</H1>
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Section: User Commands (1)<BR>Updated: 12 March 2018<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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on_ac_power - test whether computer is running on AC power
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>on_ac_power</B>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<B>on_ac_power</B>
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checks whether the system is running on abundant power (such as AC mains,
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an USB charger, etc), as opposed to battery power.
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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None.
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<A NAME="lbAF"> </A>
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<H2>EXIT STATUS</H2>
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<BR>
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<PRE>
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<B>0</B> (true) System is on mains power
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<B>1</B> (false) System is not on mains power
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<B>255</B> (false) Power status could not be determined
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</PRE><A NAME="lbAG"> </A>
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<H2>CAVEATS</H2>
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The vast majority of desktops and servers have no power sensors, thus
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they return 255 "unknown"; for most purposes you'd want to consider
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this answer to imply mains power --- note that 255 evaluates as false
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for the shell.
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<P>
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This program currently provides only information known to the kernel;
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it doesn't (yet?) query userspace daemons such as nut which may provide
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further information.
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<A NAME="lbAH"> </A>
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<H2>AUTHOR</H2>
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This manual page was written by Steve Dodd <<A HREF="mailto:steved@loth.demon.co.uk">steved@loth.demon.co.uk</A>>,
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was updated by Thomas Hood then by Adam Borowski.
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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">OPTIONS</A><DD>
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<DT id="5"><A HREF="#lbAF">EXIT STATUS</A><DD>
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<DT id="6"><A HREF="#lbAG">CAVEATS</A><DD>
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<DT id="7"><A HREF="#lbAH">AUTHOR</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: 00:05:20 GMT, March 31, 2021
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</BODY>
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</HTML>
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