📄 ch09_12.htm
字号:
<HTML><HEAD><TITLE>Recipe 9.11. Program: symirror (Perl Cookbook)</TITLE><METANAME="DC.title"CONTENT="Perl Cookbook"><METANAME="DC.creator"CONTENT="Tom Christiansen & Nathan Torkington"><METANAME="DC.publisher"CONTENT="O'Reilly & Associates, Inc."><METANAME="DC.date"CONTENT="1999-07-02T01:39:22Z"><METANAME="DC.type"CONTENT="Text.Monograph"><METANAME="DC.format"CONTENT="text/html"SCHEME="MIME"><METANAME="DC.source"CONTENT="1-56592-243-3"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="ch09_01.htm"TITLE="9. Directories"><LINKREL="prev"HREF="ch09_11.htm"TITLE="9.10. Splitting a Filename into Its Component Parts"><LINKREL="next"HREF="ch09_13.htm"TITLE="9.12. Program: lst"></HEAD><BODYBGCOLOR="#FFFFFF"><img alt="Book Home" border="0" src="gifs/smbanner.gif" usemap="#banner-map" /><map name="banner-map"><area shape="rect" coords="1,-2,616,66" href="index.htm" alt="Perl Cookbook"><area shape="rect" coords="629,-11,726,25" href="jobjects/fsearch.htm" alt="Search this book" /></map><div class="navbar"><p><TABLEWIDTH="684"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="228"><ACLASS="sect1"HREF="ch09_11.htm"TITLE="9.10. Splitting a Filename into Its Component Parts"><IMGSRC="../gifs/txtpreva.gif"ALT="Previous: 9.10. Splitting a Filename into Its Component Parts"BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="228"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1"><ACLASS="chapter"REL="up"HREF="ch09_01.htm"TITLE="9. Directories"></A></FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="228"><ACLASS="sect1"HREF="ch09_13.htm"TITLE="9.12. Program: lst"><IMGSRC="../gifs/txtnexta.gif"ALT="Next: 9.12. Program: lst"BORDER="0"></A></TD></TR></TABLE></DIV><DIVCLASS="sect1"><H2CLASS="sect1"><ACLASS="title"NAME="ch09-chap09_program_0">9.11. Program: symirror</A></H2><PCLASS="para"><ACLASS="indexterm"NAME="ch09-idx-1000012311-0"></A><ACLASS="indexterm"NAME="ch09-idx-1000012311-1"></A><ACLASS="indexterm"NAME="ch09-idx-1000012311-2"></A>The program in <ACLASS="xref"HREF="ch09_12.htm#ch09-33902"TITLE="symirror">Example 9.6</A> recursively duplicates a directory tree, making a shadow forest full of symlinks pointing back at the real files.</P><DIVCLASS="example"><H4CLASS="example"><ACLASS="title"NAME="ch09-33902">Example 9.6: symirror</A></H4><PRECLASS="programlisting">#!/usr/bin/perl -w# <ACLASS="indexterm"NAME="ch09-idx-1000004499-0"></A>symirror - build spectral forest of symlinksuse strict;use File::Find;use Cwd;my ($srcdir, $dstdir);my $cwd = <CODECLASS="literal">getcwd();</CODE>die "usage: $0 realdir mirrordir" unless @ARGV == 2;for (($srcdir, $dstdir) = @ARGV) { my $is_dir = -d; next if $is_dir; # cool if (defined ($is_dir)) { die "$0: $_ is not a directory\n"; } else { # be forgiving mkdir($dstdir, 07777) or die "can't mkdir $dstdir: $!"; }} continue { s#^(?!/)#$cwd/#; # fix relative paths} chdir $srcdir;find(\&wanted, '.');sub wanted { my($dev, $ino, $mode) = lstat($_); my $name = $File::Find::name; $mode &= 07777; # preserve directory permissions $name =~ s!^\./!!; # correct name if (-d _) { # then make a real directory mkdir("$dstdir/$name", $mode) or die "can't mkdir $dstdir/$name: $!"; } else { # shadow everything else symlink("$srcdir/$name", "$dstdir/$name") or die "can't symlink $srcdir/$name to $dstdir/$name: $!"; }}<ACLASS="indexterm"NAME="ch09-idx-1000004449-0"></A><ACLASS="indexterm"NAME="ch09-idx-1000004449-1"></A><ACLASS="indexterm"NAME="ch09-idx-1000004449-2"></A></PRE></DIV></DIV><DIVCLASS="htmlnav"><P></P><HRALIGN="LEFT"WIDTH="684"TITLE="footer"><TABLEWIDTH="684"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="228"><ACLASS="sect1"HREF="ch09_11.htm"TITLE="9.10. Splitting a Filename into Its Component Parts"><IMGSRC="../gifs/txtpreva.gif"ALT="Previous: 9.10. Splitting a Filename into Its Component Parts"BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="228"><ACLASS="book"HREF="index.htm"TITLE="Perl Cookbook"><IMGSRC="../gifs/txthome.gif"ALT="Perl Cookbook"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="228"><ACLASS="sect1"HREF="ch09_13.htm"TITLE="9.12. Program: lst"><IMGSRC="../gifs/txtnexta.gif"ALT="Next: 9.12. Program: lst"BORDER="0"></A></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="228">9.10. Splitting a Filename into Its Component Parts</TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="228"><ACLASS="index"HREF="index/index.htm"TITLE="Book Index"><IMGSRC="../gifs/index.gif"ALT="Book Index"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="228">9.12. Program: lst</TD></TR></TABLE><HRALIGN="LEFT"WIDTH="684"TITLE="footer"><FONTSIZE="-1"></DIV<!-- LIBRARY NAV BAR --> <img src="../gifs/smnavbar.gif" usemap="#library-map" border="0" alt="Library Navigation Links"><p> <a href="copyrght.htm">Copyright © 2002</a> O'Reilly & Associates. All rights reserved.</font> </p> <map name="library-map"> <area shape="rect" coords="1,0,85,94" href="../index.htm"><area shape="rect" coords="86,1,178,103" href="../lwp/index.htm"><area shape="rect" coords="180,0,265,103" href="../lperl/index.htm"><area shape="rect" coords="267,0,353,105" href="../perlnut/index.htm"><area shape="rect" coords="354,1,446,115" href="../prog/index.htm"><area shape="rect" coords="448,0,526,132" href="../tk/index.htm"><area shape="rect" coords="528,1,615,119" href="../cookbook/index.htm"><area shape="rect" coords="617,0,690,135" href="../pxml/index.htm"></map> </BODY></HTML>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -