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Full Discussion: File is not empty?
Top Forums Shell Programming and Scripting File is not empty? Post 19142 by Jimbo on Saturday 6th of April 2002 09:53:04 AM
Old 04-06-2002
lesstjm is asking how to make sure a file is not zero bytes. I think he wants to test actual file content, in which case he will want the -s option. But since the sample code used a variable, that leaves the door open to the other interpretation of wanting to test content of the variable instead of the file it references.

So just to clarify, -s will test the file itself for content, and -z and -n will test the contents of the variable.
Jimbo
 

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File::Slurp::WithinPolicy(3pm)				User Contributed Perl Documentation			    File::Slurp::WithinPolicy(3pm)

NAME
File::Slurp::WithinPolicy - Applies filesystem policies to File::Slurp SYNOPSIS
use File::Slurp::WithinPolicy qw(:all); my $text = read_file( 'filename' ); my @lines = read_file( 'filename' ); write_file( 'filename', $text ); append_file( 'filename', $more_text ); overwrite_file( 'filename', $text ); my @files = read_dir( '/path/to/dir' ); DESCRIPTION
This provides the File::Slurp interface within a policy defined by File::Policy. By default, File::Policy is a no-op and this behaves identically to File::Slurp. System administrators may want to override the default File::Policy implementation to enforce a local filesys- tem policy (see File::Policy). FUNCTIONS
read_dir See "read_dir" in File::Slurp read_file See "read_file" in File::Slurp write_file See "write_file" in File::Slurp append_file See "append_file" in File::Slurp overwrite_file See "overwrite_file" in File::Slurp EXPORTS
By default, nothing is exported. The ":all" tag can be used to export everything. Individual methods can also be exported. SEE ALSO
File::Slurp, File::Policy VERSION
$Revision: 1.4 $ on $Date: 2005/06/15 10:40:21 $ by $Author: simonf $ AUTHOR
John Alden <cpan _at_ bbc _dot_ co _dot_ uk> COPYRIGHT
(c) BBC 2005. This program is free software; you can redistribute it and/or modify it under the GNU GPL. See the file COPYING in this distribution, or http://www.gnu.org/licenses/gpl.txt perl v5.8.8 2005-06-15 File::Slurp::WithinPolicy(3pm)
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