187 lines
2.8 KiB
HTML
187 lines
2.8 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Laptop Power</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Bash Prompt HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Prompt Code Snippets"
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HREF="c679.html"><LINK
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REL="PREVIOUS"
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TITLE="Controlling the Size and Appearance of $PWD"
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HREF="x783.html"><LINK
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REL="NEXT"
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TITLE="Having the Prompt Ignored on Cut and Paste"
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HREF="x799.html"></HEAD
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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ALINK="#0000FF"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Bash Prompt HOWTO: </TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 11. Prompt Code Snippets</TD
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><TD
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WIDTH="10%"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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><A
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NAME="AEN794"
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></A
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>11.11. Laptop Power</H1
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><P
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>If you have a laptop with APM installed, try the following PROMPT_COMMAND
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to create an environment variable <TT
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CLASS="USERINPUT"
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><B
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>${battery}</B
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></TT
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> you can
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add to your prompt. This will indicate if AC power is connected and
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percentage power remaining. AC power is indicated by a "^" (for on) and a
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"v" (for off) before the percentage value. </P
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><TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="PROGRAMLISTING"
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>function prompt_command {
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# As much of the response of the "apm" command as is
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# necessary to identify the given condition:
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NO_AC_MESG="AC off"
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AC_MESG="AC on"
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APMD_RESPONSE="$(apm)"
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case ${APMD_RESPONSE} in
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*${AC_MESG}*)
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ACstat="^"
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;;
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*${NO_AC_MESG}*)
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ACstat="v"
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;;
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esac
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battery="${temp##* }"
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battery="${ACstat}${battery}"
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}</PRE
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></FONT
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></TD
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></TR
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></TABLE
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></DIV
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><DIV
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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><TR
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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HREF="x783.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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WIDTH="34%"
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VALIGN="top"
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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HREF="x799.html"
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>Next</A
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Controlling the Size and Appearance of $PWD</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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>Up</A
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WIDTH="33%"
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VALIGN="top"
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>Having the Prompt Ignored on Cut and Paste</TD
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></TR
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> |