12-08-2003
Charlton,
many of hte answers you seek can be found in teh man pages on any UNIX system...
IF you read the sort man page, you will see that it shows. you the options for sorting...
Here is an excerpt from the man page... the -r option reverses the sort order... -k n where n is a number sorts based upon the field number, normal delimiter is space or tab.
Sort the contents of infile with the second field as the sort key:
sort -k 2,2 infile
Sort, in reverse order, the contents of infile1 and infile2, placing
the output in outfile and using the first two characters of the second
field as the sort key:
sort -r -o outfile -k 2.1,2.2 infile1 infile2
Sort, in reverse order, the contents of infile1 and infile2, using the
first non-blank character of the fourth field as the sort key:
sort -r -k 4.1b,4.1b infile1 infile2
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LEARN ABOUT CENTOS
net::ldap::control::sort
Net::LDAP::Control::Sort(3) User Contributed Perl Documentation Net::LDAP::Control::Sort(3)
NAME
Net::LDAP::Control::Sort - Server Side Sort (SSS) control object
SYNOPSIS
use Net::LDAP::Control::Sort;
use Net::LDAP::Constant qw(LDAP_CONTROL_SORTRESULT);
$sort = Net::LDAP::Control::Sort->new(
order => "cn -phone"
);
$mesg = $ldap->search( @args, control => [ $sort ]);
($resp) = $mesg->control( LDAP_CONTROL_SORTRESULT );
print "Results are sorted
" if $resp and !$resp->result;
DESCRIPTION
"Net::LDAP::Control::Sort" is a sub-class of Net::LDAP::Control. It provides a class for manipulating the LDAP Server Side Sort (SSS)
request control 1.2.840.113556.1.4.473 as defined in RFC-2891
If the server supports sorting, then the response from a search operation will include a sort result control. This control is handled by
Net::LDAP::Control::SortResult.
CONSTRUCTOR ARGUMENTS
order
A string which defines how entries may be sorted. It consists of multiple directives, spearated by whitespace. Each directive describes
how to sort entries using a single attribute. If two entries have identical attributes, then the next directive in the list is used.
Each directive specifies a sorting order as follows
-attributeType:orderingRule
The leading "-" is optional, and if present indicates that the sorting order should be reversed. "attributeType" is the attribute name
to sort by. "orderingRule" is optional and indicates the rule to use for the sort and should be valid for the given "attributeType".
Any one attributeType should only appear once in the sorting list.
Examples
"cn" sort by cn using the default ordering rule for the cn attribute
"-cn" sort by cn using the reverse of the default ordering rule
"age cn" sort by age first, then by cn using the default ordering rules
"cn:1.2.3.4" sort by cn using the ordering rule defined as 1.2.3.4
METHODS
As with Net::LDAP::Control each constructor argument described above is also available as a method on the object which will return the
current value for the attribute if called without an argument, and set a new value for the attribute if called with an argument.
SEE ALSO
Net::LDAP, Net::LDAP::Control::SortResult, Net::LDAP::Control, http://www.ietf.org/rfc/rfc2891.txt
AUTHOR
Graham Barr <gbarr@pobox.com>
Please report any bugs, or post any suggestions, to the perl-ldap mailing list <perl-ldap@perl.org>
COPYRIGHT
Copyright (c) 1999-2004 Graham Barr. All rights reserved. This program is free software; you can redistribute it and/or modify it under the
same terms as Perl itself.
perl v5.16.3 2013-06-07 Net::LDAP::Control::Sort(3)