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<HTML><!--Distributed by F --><HEAD><TITLE>[Chapter 14] 14.12 Marking Your Place with a Shell Variable </TITLE><METANAME="DC.title"CONTENT="UNIX Power Tools"><METANAME="DC.creator"CONTENT="Jerry Peek, Tim O'Reilly &amp; Mike Loukides"><METANAME="DC.publisher"CONTENT="O'Reilly &amp; Associates, Inc."><METANAME="DC.date"CONTENT="1998-08-04T21:37:12Z"><METANAME="DC.type"CONTENT="Text.Monograph"><METANAME="DC.format"CONTENT="text/html"SCHEME="MIME"><METANAME="DC.source"CONTENT="1-56592-260-3"SCHEME="ISBN"><METANAME="DC.language"CONTENT="en-US"><METANAME="generator"CONTENT="Jade 1.1/O'Reilly DocBook 3.0 to HTML 4.0"><LINKREV="made"HREF="mailto:online-books@oreilly.com"TITLE="Online Books Comments"><LINKREL="up"HREF="ch14_01.htm"TITLE="14. Moving Around in a Hurry"><LINKREL="prev"HREF="ch14_11.htm"TITLE="14.11 Finding (Anyone's) Home Directory, Quickly "><LINKREL="next"HREF="ch14_13.htm"TITLE="14.13 Which Directory Am I in, Really? "></HEAD><BODYBGCOLOR="#FFFFFF"TEXT="#000000"><DIVCLASS="htmlnav"><H1><IMGSRC="gifs/smbanner.gif"ALT="UNIX Power Tools"USEMAP="#srchmap"BORDER="0"></H1><MAPNAME="srchmap"><AREASHAPE="RECT"COORDS="0,0,466,58"HREF="index.htm"ALT="UNIX Power Tools"><AREASHAPE="RECT"COORDS="467,0,514,18"HREF="jobjects/fsearch.htm"ALT="Search this book"></MAP><TABLEWIDTH="515"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch14_11.htm"TITLE="14.11 Finding (Anyone's) Home Directory, Quickly "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 14.11 Finding (Anyone's) Home Directory, Quickly "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1">Chapter 14<BR>Moving Around in a Hurry</FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch14_13.htm"TITLE="14.13 Which Directory Am I in, Really? "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 14.13 Which Directory Am I in, Really? "BORDER="0"></A></TD></TR></TABLE>&nbsp;<HRALIGN="LEFT"WIDTH="515"TITLE="footer"></DIV><DIVCLASS="SECT1"><H2CLASS="sect1"><ACLASS="title"NAME="UPT-ART-0250">14.12 Marking Your Place with a Shell Variable </A></H2><PCLASS="para">The following alias will store the current directory name in a variable:</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">alias mark 'set \!:1=$cwd'</PRE></BLOCKQUOTE></P><PCLASS="para">so as to use a feature of the C shell:</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">% <CODECLASS="userinput"><B>mark </B></CODE><CODECLASS="replaceable"><I>here</I></CODE>   ...% <CODECLASS="userinput"><B>cd </B></CODE><CODECLASS="replaceable"><I>here</I></CODE></PRE></BLOCKQUOTE></P><PCLASS="para">One need not even type <CODECLASS="literal">$</CODE><CODECLASS="replaceable"><I>here</I></CODE>. If a directory does not exist,<EMCLASS="emphasis">csh</EM> tries searching its<SPANCLASS="link"><EMCLASS="emphasis">cdpath</EM> (<ACLASS="linkend"HREF="ch14_05.htm"TITLE="Saving Time When You Change Directories: cdpath ">14.5</A>)</SPAN>,then tries evaluating the name as a<SPANCLASS="link">variable (<ACLASS="linkend"HREF="ch06_08.htm"TITLE="Shell Variables ">6.8</A>, <ACLASS="linkend"HREF="ch06_09.htm"TITLE="Special C Shell Variables ">6.9</A>)</SPAN>.</P><PCLASS="para">(I generally use<SPANCLASS="link"><EMCLASS="emphasis">pushd</EM> and <EMCLASS="emphasis">popd</EM> (<ACLASS="linkend"HREF="ch14_06.htm"TITLE="The Shells' pushd and popd Commands ">14.6</A>)</SPAN>to store directory names;<EMCLASS="emphasis">mark</EM> ismore useful with commands that need to look in two different paths,and there <CODECLASS="literal">$</CODE><CODECLASS="replaceable"><I>here</I></CODE> is necessary anyway. Ah well.)</P><PCLASS="para">[In <EMCLASS="emphasis">bash</EM>, you can do this by setting the <EMCLASS="emphasis">cdable_vars</EM> variable.(Put <CODECLASS="literal">cdable_vars=1</CODE> in your<SPANCLASS="link">shell setup file (<ACLASS="linkend"HREF="ch02_02.htm"TITLE="Shell Setup Files-Which, Where, and Why ">2.2</A>)</SPAN>.)-<EMCLASS="emphasis">JP</EM>]<ACLASS="indexterm"NAME="AUTOID-15766"></A></P><DIVCLASS="sect1info"><PCLASS="SECT1INFO">- <SPANCLASS="authorinitials">CT</SPAN> <SPANCLASS="bibliomisc">in <ACLASS="systemitem.newsgroup"HREF="news:comp.unix.wizards">comp.unix.wizards</A> on Usenet, 14 February 1987</SPAN></P></DIV></DIV><DIVCLASS="htmlnav"><P></P><HRALIGN="LEFT"WIDTH="515"TITLE="footer"><TABLEWIDTH="515"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch14_11.htm"TITLE="14.11 Finding (Anyone's) Home Directory, Quickly "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 14.11 Finding (Anyone's) Home Directory, Quickly "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><ACLASS="book"HREF="index.htm"TITLE="UNIX Power Tools"><IMGSRC="gifs/txthome.gif"SRC="gifs/txthome.gif"ALT="UNIX Power Tools"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch14_13.htm"TITLE="14.13 Which Directory Am I in, Really? 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