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Top Forums Shell Programming and Scripting Edit first line of a text file Post 302693579 by zaxxon on Wednesday 29th of August 2012 11:13:25 AM
Old 08-29-2012
Why awk? What have you tried so far?

You always have to open a file, wether for reading, writing or both, afaik. Maybe you mean something else instead of "open".

Issue 2:
Write the line to a file and add the long file to the one-liner file by shell's redirection/concatenation.
 

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AnyData::Storage::File(3pm)				User Contributed Perl Documentation			       AnyData::Storage::File(3pm)

NAME
AnyData::Storage::File -- manipulate files with rich warnings DESCRIPTION
Opens, reads from, writes to, creates and destroys files with numerous options for error handling, flocking, binmode, etc. The simplest form is the equivalent of my $f = AnyData::Storage::File->new(dirs=>@dirs,flock=>1); my $str1 = $f->adSlurp($file); for( @dirs ) { open(IN,$file) or die $!; } sub slurp { local *IN; local $/ = undef; } But, depending on how you set the default behaviour SYNOPSIS
use AnyData; my $f = AnyData::Storage::File->new; $f->set('binmode',1|0); $f->set('PrintError',1|0); $f->set('RaiseError',1|0); $f->set('Trace',1|0); $f->set('f_dir',$dir|$dir_array) < input, fail if doesn't exist > output, truncate if exists, create if doesn't >> append, create if doesn't exist +< read/write, fail if doesn't exist r = < r+ = new() my $f = AnyData::Storage::File->new; or my $f = AnyData::Storage::File->new( %flags ); %flags is a hash which can contain any or all of: f_dir => $directory, # defaults to './' ( binmode => $binmode, # defaults to 0 (doesn't binmode files) printError => $warnings, # defaults to 1 (print warning on errors) open_local_file( $fname, $mode ); Mode is one of a = append open for reading & writing, create if doesn't exist r = read open for reading, fail if doesn't exist u = open open for reading & writing, fail if doesn't exist c = create open for reading & writing, fail if it already exists o = overwrite open for reading & writing, overwrite if it already exists Additionally, all modes fail if the file can't be opened. On systems that support flock, 'r' fails if a shared lock can not be obtained; the other modes fail if an exclusive lock can't be obtained. perl v5.10.1 2004-08-17 AnyData::Storage::File(3pm)
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