03-08-2001
use test
example:
Perform a mkdir if a directory does not exist:
test ! -d tempdir && mkdir tempdir
for i in *
do
if test -d "$i"
Directory processing commands......
fi
done
it is commonly used with if while do etc. in shell scripts.
-r filename True if filename exists and is readable
-w filename True if filename exists and is writable
-x filename True if filename exists and is executable
-f filename True if filename exists and is a regular file
-d filename True if filename exists and is a directory
-h filename True if filename exists and is a symbolic link.
...........
test commands returns a status of 0(true) or 1 (false) depending on the evaluation of the conditional expression, which can be unary or binary. there is a long list of expression available; check the man page for more info
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LEARN ABOUT DEBIAN
io::all::ftp
IO::All::FTP(3pm) User Contributed Perl Documentation IO::All::FTP(3pm)
NAME
IO::All::FTP - Extends IO::All to FTP URLs
SYNOPSIS
use IO::All;
"hello world
" > io('ftp://localhost/test/x'); # save to FTP
io('ftp//example.org/pub/xyz') > io('xyz'); # GET to file
# two ways of getting a file with a password:
$content < io('ftp://me:secret@example.org/xyz');
$content < io('ftp://example.org/xyz')->user('me')->password('secret');
DESCRIPTION
This module extends IO::All for dealing with FTP URLs. Note that you don't need to use it explicitly, as it is autoloaded by IO::All
whenever it sees something that looks like an FTP URL.
METHODS
This is a subclass of IO::All::LWP. The only new method is "ftp", which can be used to create a blank IO::All::FTP object; or it can also
take an FTP URL as a parameter. Note that in most cases it is simpler just to call io('ftp//example.com'), which calls the "ftp" method
automatically.
OPERATOR OVERLOADING
The same operators from IO::All may be used. < GETs an FTP URL; > PUTs to an FTP URL.
SEE ALSO
IO::All::LWP, IO::All, LWP.
AUTHORS
Ivan Tubert-Brohman <itub@cpan.org> and Brian Ingerson <ingy@cpan.org>
COPYRIGHT
Copyright (c) 2007. Ivan Tubert-Brohman and Brian Ingerson. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
See <http://www.perl.com/perl/misc/Artistic.html>
perl v5.10.0 2007-03-29 IO::All::FTP(3pm)