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<HTML><!--Distributed by F --><HEAD><TITLE>[Chapter 18] 18.14 Relinking Multiple Symbolic Links </TITLE><METANAME="DC.title"CONTENT="UNIX Power Tools"><METANAME="DC.creator"CONTENT="Jerry Peek, Tim O'Reilly & Mike Loukides"><METANAME="DC.publisher"CONTENT="O'Reilly & Associates, Inc."><METANAME="DC.date"CONTENT="1998-08-04T21:39:11Z"><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="ch18_01.htm"TITLE="18. Linking, Renaming, and Copying Files"><LINKREL="prev"HREF="ch18_13.htm"TITLE="18.13 One More Way to Do It "><LINKREL="next"HREF="ch18_15.htm"TITLE="18.15 Copying Directory Trees with cp -r "></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="ch18_13.htm"TITLE="18.13 One More Way to Do It "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 18.13 One More Way to Do It "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1">Chapter 18<BR>Linking, Renaming, and Copying Files</FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch18_15.htm"TITLE="18.15 Copying Directory Trees with cp -r "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 18.15 Copying Directory Trees with cp -r "BORDER="0"></A></TD></TR></TABLE> <HRALIGN="LEFT"WIDTH="515"TITLE="footer"></DIV><DIVCLASS="SECT1"><H2CLASS="sect1"><ACLASS="title"NAME="UPT-ART-8015">18.14 Relinking Multiple Symbolic Links </A></H2><TABLECLASS="para.programreference"BORDER="1"><TR><THVALIGN="TOP"><ACLASS="programreference"HREF="examples/index.htm"TITLE="relink">relink</A><BR></TH><TDVALIGN="TOP"><ACLASS="indexterm"NAME="AUTOID-20908"></A><ACLASS="indexterm"NAME="AUTOID-20911"></A><ACLASS="indexterm"NAME="AUTOID-20914"></A><ACLASS="indexterm"NAME="AUTOID-20917"></A>Like the <EMCLASS="emphasis">rename</EM> program in article<ACLASS="xref"HREF="ch18_10.htm"TITLE="There's More than One Way to Do It ">18.10</A>,the <EMCLASS="emphasis">relink</EM> program (a Perl script)relinks the symbolic links given according to the rule specified as thefirst argument.The argument is a Perl expression that is expected to modify the<CODECLASS="literal">$_</CODE> string in Perl for at least some of the names specified.For each symbolic link named on the command line, the Perl expressionwill be executed on the contents of the symbolic link with that name.If a given symbolic link's contents is not modified by the expression,it will not be changed.If a name given on the command line is not a symbolic link, it will be ignored.If no names are given on the command line, names will be readvia standard input.</TD></TR></TABLE><PCLASS="para">For example, to relink all symbolic links in the current directorypointing to somewhere in <EMCLASS="emphasis">X11R3</EM> so that they point to <EMCLASS="emphasis">X11R4</EM>,you might say:</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">$ <CODECLASS="userinput"><B>relink 's/X11R3/X11R4/' *</B></CODE></PRE></BLOCKQUOTE></P><PCLASS="para">Tochange all occurrences of links in the system from <EMCLASS="emphasis">/usr/spool</EM>to <EMCLASS="emphasis">/var/spool</EM>, you'd say:</P><PCLASS="para"><TABLECLASS="screen.co"BORDER="1"><TR><THVALIGN="TOP"><PRECLASS="calloutlist"><ACLASS="co"HREF="ch17_13.htm"TITLE="17.13 Searching for Files by Type ">-type l</A> </PRE></TH><TDVALIGN="TOP"><PRECLASS="screen">$ <CODECLASS="userinput"><B>find / -type l -print | relink 's#^/usr/spool#/var/spool#'</B></CODE></PRE></TD></TR></TABLE></P><DIVCLASS="sect1info"><PCLASS="SECT1INFO">- <SPANCLASS="authorinitials">LW</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="ch18_13.htm"TITLE="18.13 One More Way to Do It "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 18.13 One More Way to Do It 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