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Full Discussion: Cannot extract libraries using sed
Top Forums UNIX for Beginners Questions & Answers Cannot extract libraries using sed Post 303037771 by sand1234 on Tuesday 13th of August 2019 08:14:44 AM
Old 08-13-2019
Hi MadeinGermany,

Thanks for the tips.

The first solution does not work,

Code:
 ./copy_chroot_lib.sh ls echo | sed -n 's#\(/lib\).*#\1#p'
        libselinux.so.1 => /lib
        libc.so.6 => /lib
        libpcre.so.3 => /lib
        libdl.so.2 => /lib
        /lib
        libpthread.so.0 => /lib
        libc.so.6 => /lib
        /lib

While the output from the second solution does not capture only file path, and also captures (0x00...)

Code:
 ./copy_chroot_lib.sh ls echo | sed -n 's#.* => ##p'
/lib/x86_64-linux-gnu/libselinux.so.1 (0x00007f73bfead000)
/lib/x86_64-linux-gnu/libc.so.6 (0x00007f73bfcc3000)
/lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f73bfc4f000)
/lib/x86_64-linux-gnu/libdl.so.2 (0x00007f73bfc49000)
/lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f73bfc28000)
/lib/x86_64-linux-gnu/libc.so.6 (0x00007f2cfa01c000)

I suppose we can exclude the hex value via the following, then capture lines starting with /lib.

Code:
 ./copy_chroot_lib.sh ls echo | sed -E 's#.* => ##;s/[(]0.*//'
        linux-vdso.so.1   <----- should not be included
/lib/x86_64-linux-gnu/libselinux.so.1
/lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libpcre.so.3
/lib/x86_64-linux-gnu/libdl.so.2
        /lib64/ld-linux-x86-64.so.2
/lib/x86_64-linux-gnu/libpthread.so.0
        linux-vdso.so.1
/lib/x86_64-linux-gnu/libc.so.6
        /lib64/ld-linux-x86-64.so.2

Do let me know if you have any better ideas.

Thanks!
 

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LEARN ABOUT DEBIAN

pmload

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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