188 lines
3.4 KiB
HTML
188 lines
3.4 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Loading a Different Prompt, Immediately</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="Loading a Different Prompt"
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HREF="c641.html"><LINK
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REL="PREVIOUS"
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TITLE="Loading a Different Prompt, Later"
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HREF="x643.html"><LINK
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REL="NEXT"
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TITLE="Loading Different Prompts in Different X Terms"
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HREF="x664.html"></HEAD
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><BODY
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CLASS="SECT1"
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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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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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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="x643.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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ALIGN="center"
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VALIGN="bottom"
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>Chapter 9. Loading a Different Prompt</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="x664.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="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="AEN655"
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></A
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>9.2. Loading a Different Prompt, Immediately</H1
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><P
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>You can change the prompt in your current terminal (using the example
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"elite" function above) by typing <TT
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CLASS="USERINPUT"
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><B
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>source elite</B
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></TT
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>
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followed by <TT
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CLASS="USERINPUT"
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><B
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>elite</B
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></TT
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> (assuming that the elite
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function file is the working directory). This is somewhat cumbersome, and
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leaves you with an extra function (elite) in your environment space - if
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you want to clean up the environment, you would have to type
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<TT
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CLASS="USERINPUT"
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><B
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>unset elite</B
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></TT
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> as well. This would seem like an
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ideal candidate for a small shell script, but a script doesn't work here
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because the script cannot change the environment of your current shell: it
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can only change the environment of the subshell it runs in. As soon as the
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script stops, the subshell goes away, and the changes the script made to
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the environment are gone. What <EM
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>can</EM
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> change environment
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variables of your current shell are environment functions. The bashprompt
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package puts a function called <B
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CLASS="COMMAND"
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>callbashprompt</B
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> into your
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environment, and, while they don't document it, it can be called to load
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any bashprompt theme on the fly. It looks in the theme directory it
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installed (the theme you're calling has to be there), sources the function
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you asked for, loads the function, and then unsets the function, thus
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keeping your environment uncluttered. <B
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CLASS="COMMAND"
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>callbashprompt</B
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>
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wasn't intended to be used this way, and has no error checking, but if you
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keep that in mind, it works quite well. </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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BORDER="0"
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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="x643.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="x664.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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>Loading a Different Prompt, Later</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="c641.html"
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ACCESSKEY="U"
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>Up</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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>Loading Different Prompts in Different X Terms</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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> |