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Top Forums UNIX for Dummies Questions & Answers Adding header to an existing file Post 302217614 by shash on Wednesday 23rd of July 2008 06:59:09 AM
Old 07-23-2008
Adding header to an existing file

Dear All,

I need to add a header of one line to an already existing file.
I know that it can be achieved by the following:

echo "Header" > newfile
cat file1 >> newfile

But my problem is that file is huge and there is no space for creating a new file every time. Is there a way that I can add header without creating a new file?

Thanks
Shash
 

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Courriel::Header(3pm)					User Contributed Perl Documentation				     Courriel::Header(3pm)

NAME
Courriel::Header - A single header's name and value VERSION
version 0.29 SYNOPSIS
my $subject = $headers->get('subject'); print $subject->value(); DESCRIPTION
This class represents a single header, which consists of a name and value. API
This class supports the following methods: Courriel::Header->new( ... ) This method requires two attributes, "name" and "value". Both must be strings. The "name" cannot be empty, but the "value" can. $header->name() The header name as passed to the constructor. $header->value() The header value as passed to the constructor. $header->as_string( charset => $charset ) Returns the header name and value with any necessary MIME encoding and folding. The "charset" parameter specifies what character set to use for MIME-encoding non-ASCII values. This defaults to "utf8". The charset name must be one recognized by the Encode module. $header->stream_to( output => $output, charset => ... ) This method will send the stringified header to the specified output. The output can be a subroutine reference, a filehandle, or an object with a "print()" method. The output may be sent as a single string, as a list of strings, or via multiple calls to the output. See the "as_string()" method for documentation on the "charset" parameter. ROLES
This class does the "Courriel::Role::Streams" role. AUTHOR
Dave Rolsky <autarch@urth.org> COPYRIGHT AND LICENSE
This software is Copyright (c) 2012 by Dave Rolsky. This is free software, licensed under: The Artistic License 2.0 (GPL Compatible) perl v5.14.2 2012-03-07 Courriel::Header(3pm)
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