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Top Forums Shell Programming and Scripting Replace a particular pattern in a file Post 302474491 by durden_tyler on Wednesday 24th of November 2010 11:12:51 AM
Old 11-24-2010
Or using Perl -

Code:
$
$ cat f42
abcd
$$xyz=123
$$zef=789
 
$$mno=123
$$pqr=456
$
$
$ typeset -x VAR="999"
$
$ # Perl one-liner to substitute the value
$ perl -lne 'if (/^(\$\$pqr=).*/){print $1,$ENV{"VAR"}} else {print}' f42
abcd
$$xyz=123
$$zef=789
 
$$mno=123
$$pqr=999
$
$

tyler_durden
 

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Courier::Filter::Logger::Syslog(3pm)			User Contributed Perl Documentation		      Courier::Filter::Logger::Syslog(3pm)

NAME
Courier::Filter::Logger::Syslog - Syslog logger for the Courier::Filter framework SYNOPSIS
use Courier::Filter::Logger::Syslog; my $logger = Courier::Filter::Logger::Syslog->new(); # For use in an individual filter module: my $module = Courier::Filter::Module::My->new( ... logger => $logger, ... ); # For use as a global Courier::Filter logger object: my $filter = Courier::Filter->new( ... logger => $logger, ... ); DESCRIPTION
This class is a syslog logger class for use with Courier::Filter and its filter modules. It is derived from Courier::Filter::Logger::IOHandle. Constructor The following constructor is provided: new: returns Courier::Filter::Logger::Syslog; throws Courier::Error Creates a new logger that logs messages to syslog. Instance methods The following instance methods are provided, as inherited from Courier::Filter::Logger::IOHandle: log_error($text): throws Perl exceptions Logs the error message given as $text (a string which may contain newlines). log_rejected_message($message, $reason): throws Perl exceptions Logs the Courier::Message given as $message as having been rejected due to $reason (a string which may contain newlines). SEE ALSO
Courier::Filter::Logger::IOHandle, Courier::Filter::Logger, Courier::Filter::Overview. For AVAILABILITY, SUPPORT, and LICENSE information, see Courier::Filter::Overview. AUTHOR
Julian Mehnle <julian@mehnle.net> perl v5.14.2 2011-12-27 Courier::Filter::Logger::Syslog(3pm)
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