245 lines
3.9 KiB
HTML
245 lines
3.9 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Prompt Code Snippets</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="PREVIOUS"
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TITLE='A "Proof of Concept" Example'
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HREF="x672.html"><LINK
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REL="NEXT"
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TITLE="Built-in Escape Sequences"
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HREF="x686.html"></HEAD
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><BODY
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CLASS="CHAPTER"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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SUMMARY="Header navigation table"
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CELLSPACING="0"
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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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VALIGN="bottom"
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><A
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HREF="x672.html"
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ACCESSKEY="P"
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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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VALIGN="bottom"
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></TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="x686.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="CHAPTER"
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><H1
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><A
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NAME="AEN679"
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></A
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>Chapter 11. Prompt Code Snippets</H1
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><DIV
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CLASS="TOC"
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><DL
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><DT
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><B
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>Table of Contents</B
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></DT
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><DT
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>11.1. <A
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HREF="x686.html"
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>Built-in Escape Sequences</A
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></DT
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><DT
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>11.2. <A
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HREF="x690.html"
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>Date and Time</A
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></DT
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><DT
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>11.3. <A
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HREF="x700.html"
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>Counting Files in the Current Directory</A
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></DT
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><DT
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>11.4. <A
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HREF="x711.html"
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>Total Bytes in the Current Directory</A
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></DT
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><DT
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>11.5. <A
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HREF="x721.html"
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>Checking the Current TTY</A
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></DT
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><DT
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>11.6. <A
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HREF="x733.html"
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>Stopped Jobs Count</A
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></DT
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><DT
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>11.7. <A
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HREF="x746.html"
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>Load</A
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></DT
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><DT
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>11.8. <A
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HREF="x758.html"
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>Uptime</A
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></DT
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><DT
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>11.9. <A
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HREF="x771.html"
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>Number of Processes</A
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></DT
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><DT
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>11.10. <A
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HREF="x783.html"
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>Controlling the Size and Appearance of $PWD</A
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></DT
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><DT
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>11.11. <A
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HREF="x794.html"
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>Laptop Power</A
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></DT
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><DT
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>11.12. <A
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HREF="x799.html"
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>Having the Prompt Ignored on Cut and Paste</A
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></DT
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><DT
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>11.13. <A
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HREF="x806.html"
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>New Mail</A
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></DT
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><DT
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>11.14. <A
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HREF="x810.html"
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>Prompt Beeps After Long-Running Commands</A
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></DT
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></DL
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></DIV
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><P
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>This section shows how to put various pieces of information into the Bash
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prompt. There are an infinite number of things that could be put in your
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prompt. Feel free to send me examples, I'll try to include what I think
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will be most widely used. If you have an alternate way to retrieve a piece
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of information here, and feel your method is more efficient, please contact
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me. It's easy to write bad code, I do it often, but it's great to write
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elegant code, and a pleasure to read it. I manage it every once in a
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while, and would love to have more of it to put in here. </P
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><P
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>To incorporate shell code in prompts, it has to be escaped. Usually, this
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will mean putting it inside <TT
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CLASS="USERINPUT"
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><B
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>\$(<command>)</B
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></TT
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> so
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that the output of <TT
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CLASS="USERINPUT"
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><B
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>command</B
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></TT
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> is substituted each time
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the prompt is generated. </P
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><P
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>Please keep in mind that I develop and test this code on a single user
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900 MHz Athlon with 256 meg of RAM, so the delay generated by these code
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snippets doesn't usually mean much to me. To help with this, I recently
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assembled a 25 MHz 486 SX with 16 meg of RAM, and you will see the output
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of the "time" command for each snippet to indicate how much of a delay it
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causes on a slower machine. </P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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CELLPADDING="0"
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CELLSPACING="0"
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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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><A
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HREF="x672.html"
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ACCESSKEY="P"
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>Prev</A
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></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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><A
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="x686.html"
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ACCESSKEY="N"
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>Next</A
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></TD
|
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></TR
|
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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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>A "Proof of Concept" Example</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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> </TD
|
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><TD
|
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WIDTH="33%"
|
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ALIGN="right"
|
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VALIGN="top"
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>Built-in Escape Sequences</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |