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Full Discussion: du alternative in perl
Top Forums Shell Programming and Scripting du alternative in perl Post 302233882 by jim mcnamara on Monday 8th of September 2008 05:31:30 PM
Old 09-08-2008
du depends heavily on stat - which is POSIX. So writing C code is failry portable,
along with the dirent.h functions

perl implements stat, so that's cake. The other needed calls: closedir, opendir, and readdir to get file names to stat. Both of those are in perl as well.... go for it.

Perl by Example has an example getting all the file names in a directory.

This does something else with stat data as entry-level example code for the forums here, but you can clean it up for your use:

Code:
#!/usr/bin/perl 
    use strict;
	sub numeric;
	sub to_date;
	my @filelist = ();
	my @sortarray = ();
	my $idx = 0;
	my $value = "";
	my $file = "";
	opendir(DIR, "..") || die "can't open $!\n";
	@filelist = readdir(DIR);
	closedir(DIR);

	$idx = 0;
	@sortarray = ();
	foreach $file ( @filelist )
	{
		$sortarray[$idx] = sprintf("%d %s", (stat "../$file")[9], $file);
		$idx++;
	}

	@filelist = sort numeric @sortarray ;
    print "@filelist\n";
	foreach $value ( @filelist )
	{
		print &to_date( $value );
	}

	sub numeric { my @one = split(' ', $a);
		          my @two = split(' ', $b); 
		          return $one[0] <=> $two[0];
		        }
	sub to_date {
		 my @months = ();
		 my $filename = "";
		 my $mtime = 0;
		 my $sec = 0; 
		 my $min = 0; 
		 my $hr = 0;
		 my $mday = 0; 
		 my $mon = 0; 
		 my $yr = 0; 
		 my $wday = 0; 
		 my $yday = 0; 
		 my $dntcare =0;
		 my $retval = "";
		 
		 @months = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);

         ($mtime, $filename) = split(' ', $_[0]);	     
	     ($sec, $min, $hr, $mday, $mon, $yr, $wday, $yday, $dntcare) =
	         localtime($mtime);
	     $retval = sprintf( "%-10s %3s %02d %4d %02d:%02d:%02d\n",
	         $filename, $months[$mon], $mday, $yr + 1900, $hr, $min, $sec );

         return $retval;
	}

 

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LEARN ABOUT DEBIAN

asp-perl

ASP-PERL(1p)						User Contributed Perl Documentation					      ASP-PERL(1p)

NAME

       asp-perl - Apache::ASP CGI and command line script processor

SYNOPSIS

       asp-perl [-hsdb] [-f asp.conf] [-o directory] file1 @arguments file2 @arguments ...

	   -h  Help you are getting now!
	   -f  Specify an alternate configuration file other than ./asp.conf
	   -s  Setup $Session and $Application state for script.
	   -d  Set to debug code upon errors.
	   -b  Only return body of document, no headers.
	   -o  Output directory, writes to files there instead of STDOUT
	   -p  GlobalPackage config, what perl package are the scripts compiled in.

DESCRIPTION

       This program will run Apache::ASP scripts from the command line.  Each file that is specified will be run, and the $Request->QueryString()
       and $Request->Form() data will be initialized by the @arguments following the script file name.

       The @arguments will be written as space separated words, and will be initialized as an associate array where %arguments = @arguments.  As
       an example:

	asp-perl file.asp key1 value1 key2 value2

       would be similar to calling the file.asp in a web environment like

	/file.asp?key1=value1&key2=value2

       The asp.conf script will be read from the current directory for parameters that would be set with PerlSetVar normally under mod_perl.  For
       more information on how to configure the asp.conf file, please see < http://www.apache-asp.org/cgi.html >

SEE ALSO

       perldoc Apache::ASP, and also http://www.apache-asp.org

COPYRIGHT

       Copyright 1998-2004 Joshua Chamas, Chamas Enterprises Inc.

       This program is distributed under the GPL.  Please see the LICENSE file in the Apache::ASP distribution for more information.

perl v5.14.2							    2011-08-15							      ASP-PERL(1p)
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