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Full Discussion: Help with refining script
Top Forums Shell Programming and Scripting Help with refining script Post 302988747 by Simplify on Sunday 1st of January 2017 11:18:53 PM
Old 01-02-2017
Thanks again Stomp, that has certainly explained things. I have been looking at the operations you provide, however, I was still having some problems with the syntax. With your example, I now understand that process and will be using that now and in the future.

Quote:
Originally Posted by stomp
That for the state assignment...
Code:
state=$(systemctl is-active $i >/dev/null && echo Alive || echo Dead)

What's regarding the output, printf can handle format strings as described in the manpage: man 3 printf.

Example

Code:
printf "%-20s : %-20s\n" "$service_name" "$service_state"

Description

Output String variable $service_name with minimum length 20 chars - aligned left - then space then : then space then variable $service_state with minimum length 20 chars - aligned left and then new line.
 

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Net::LDAP::Control::PostRead(3) 			User Contributed Perl Documentation			   Net::LDAP::Control::PostRead(3)

NAME
Net::LDAP::Control::PostRead - LDAPv3 Post-Read control object SYNOPSIS
use Net::LDAP; use Net::LDAP::Control::PostRead; use Net::LDAP::Constant qw( LDAP_CONTROL_POSTREAD LDAP_SUCCESS ); $ldap = Net::LDAP->new( "ldap.mydomain.eg" ); $postread = Net::LDAP::Control::PostRead->new( attrs => [ qw/givenName/ ] ); my $mesg = $ldap->modify( "cn=Barbara Jensen, o=University of Michigan, c=US", replace => { givenName => "Babs" }, control => $postread ); if ($mesg->code eq LDAP_SUCCESS) { my ($afterwards) = $mesg->control( LDAP_CONTROL_PREREAD ); my $entry = $afterwards ? $afterwards->entry() : undef; if ($entry) { print "givenName changed to '" . join("', '", $entry->get_value(givenName") . "' to 'Babs' "); } } DESCRIPTION
"Net::LDAP::Control::PostRead" provides an interface for the creation and manipulation of objects that represent the "Post-Read Controls" as described by RFC 4527. In modification operations, the "Post-Read request control" indicates to the server that a copy of the modified entry after the update is to be returned. After the successful completion of the operation, the accompanying "Post-Read response control" allows one to retrieve the updated value from the servers's response. One use case of this control may be to obtain values of operational attributes, such as the "entryUUID" and "modifyTimestamp" attributes, updated by the server as part of the update operation. CONSTRUCTOR ARGUMENTS
In addition to the constructor arguments described in Net::LDAP::Control the following are provided. attrs => [ ATTR, ... ] A list of attributes to be returned in the entry returned in the response control. If absent, all attributes are returned. Operational attributes may be included in the list by explicitly asking for them or by using special "+" feature (provided the server supports this feature). 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. In addition to these methods, the control also supports the following method: entry () Returns the entry from the response control in the response message to the LDAP request that contained the request control. The result is either a Net::LDAP::Entry object or undefined. SEE ALSO
Net::LDAP, Net::LDAP::Control, http://www.ietf.org/rfc/rfc4527.txt AUTHOR
Peter Marschall <peter@adpm.de> Please report any bugs, or post any suggestions, to the perl-ldap mailing list <perl-ldap@perl.org> COPYRIGHT
Copyright (c) 2008,2011 Peter Marschall. 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::PostRead(3)
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