Full Discussion: Multiline Grep
Top Forums UNIX for Dummies Questions & Answers Multiline Grep Post 302175164 by Yogesh Sawant on Thursday 13th of March 2008 07:47:22 AM
try this Perl script:
Code:
#!/usr/local/bin/perl
# multiliner.pl
use strict;
my $filename = shift;
open (FILE, "<", $filename)  or  die "Failed to read file $filename : $! \n";
my $whole_file;
{
    local $/;
    $whole_file = <FILE>;
}
close(FILE);
while ($whole_file =~ m#\<a\>(.*?)\<\/a\>#g) {
    print $1 . "\n";
}

run this script as:
Code:
perl multiliner.pl source.xml  > output.xml

 
Test Your Knowledge in Computers #892
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sed scripts cannot have comments.
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PMLOAD(1p)						User Contributed Perl Documentation						PMLOAD(1p)

NAME
pmload - show what files a given module loads at compile time DESCRIPTION
Given an argument of a module name, show all the files that are loaded directly or indirectly when the module is used at compile-time. EXAMPLES
$ pmload IO::Handle /usr/local/devperl/lib/5.00554/Exporter.pm /usr/local/devperl/lib/5.00554/Carp.pm /usr/local/devperl/lib/5.00554/strict.pm /usr/local/devperl/lib/5.00554/vars.pm /usr/local/devperl/lib/5.00554/i686-linux/DynaLoader.pm /usr/local/devperl/lib/5.00554/i686-linux/IO/Handle.pm /usr/local/devperl/lib/5.00554/Symbol.pm /usr/local/devperl/lib/5.00554/i686-linux/IO/File.pm /usr/local/devperl/lib/5.00554/SelectSaver.pm /usr/local/devperl/lib/5.00554/i686-linux/Fcntl.pm /usr/local/devperl/lib/5.00554/AutoLoader.pm /usr/local/devperl/lib/5.00554/i686-linux/IO.pm /usr/local/devperl/lib/5.00554/i686-linux/IO/Seekable.pm $ cat `pmload IO::Socket` | wc -l 4015 $ oldperl -S pmload Tk /usr/lib/perl5/site_perl/Tk/Pretty.pm /usr/lib/perl5/Symbol.pm /usr/lib/perl5/site_perl/Tk/Frame.pm /usr/lib/perl5/site_perl/Tk/Toplevel.pm /usr/lib/perl5/strict.pm /usr/lib/perl5/Exporter.pm /usr/lib/perl5/vars.pm /usr/lib/perl5/site_perl/auto/Tk/Wm/autosplit.ix /usr/lib/perl5/site_perl/auto/Tk/Widget/autosplit.ix /usr/lib/perl5/site_perl/Tk.pm /usr/lib/perl5/i386-linux/5.00404/DynaLoader.pm /usr/lib/perl5/site_perl/auto/Tk/Frame/autosplit.ix /usr/lib/perl5/site_perl/auto/Tk/Toplevel/autosplit.ix /usr/lib/perl5/Carp.pm /usr/lib/perl5/site_perl/auto/Tk/autosplit.ix /usr/lib/perl5/site_perl/Tk/CmdLine.pm /usr/lib/perl5/site_perl/Tk/MainWindow.pm /usr/lib/perl5/site_perl/Tk/Submethods.pm /usr/lib/perl5/site_perl/Tk/Configure.pm /usr/lib/perl5/AutoLoader.pm /usr/lib/perl5/site_perl/Tk/Derived.pm /usr/lib/perl5/site_perl/Tk/Image.pm /usr/lib/perl5/site_perl/Tk/Wm.pm /usr/lib/perl5/site_perl/Tk/Widget.pm NOTE
If the programmers used a delayed "require", those files won't show up. Furthermore, this doesn't show all possible files that get opened, just those that those up in %INC. Most systems have a way to trace system calls. You can use this to find the real answer. First, get a baseline with no modules loaded. $ strace perl -e 1 2>&1 | perl -nle '/^open("(.*?)".* = [^-]/ && print $1' /etc/ld.so.cache /lib/libnsl.so.1 /lib/libdb.so.2 /lib/libdl.so.2 /lib/libm.so.6 /lib/libc.so.6 /lib/libcrypt.so.1 /dev/null $ strace perl -e 1 2>&1 | grep -c '^open.*= [^-]' 8 Now add module loads and see what you get: $ strace perl -MIO::Socket -e 1 2>&1 | grep -c '^open.*= [^-]' 24 $ strace perl -MTk -e 1 2>&1 | grep -c '^open.*= [^-]' 35 SEE ALSO
Devel::Loaded, plxload(1). AUTHORS and COPYRIGHTS Copyright (C) 1999 Tom Christiansen. Copyright (C) 2006-2008 Mark Leighton Fisher. This is free software; you can redistribute it and/or modify it under the terms of either: (a) the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version, or (b) the Perl "Artistic License". (This is the Perl 5 licensing scheme.) Please note this is a change from the original pmtools-1.00 (still available on CPAN), as pmtools-1.00 were licensed only under the Perl "Artistic License". perl v5.10.1 2010-02-22 PMLOAD(1p)

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