Env man page on UnixWare

Man page or keyword search:  
man Server   3616 pages
apropos Keyword Search (all sections)
Output format
UnixWare logo
[printable version]

Env(3)		       Perl Programmers Reference Guide			Env(3)

NAME
       Env - perl module that imports environment variables as scalars or
       arrays

SYNOPSIS
	   use Env;
	   use Env qw(PATH HOME TERM);
	   use Env qw($SHELL @LD_LIBRARY_PATH);

DESCRIPTION
       Perl maintains environment variables in a special hash named %ENV.  For
       when this access method is inconvenient, the Perl module "Env" allows
       environment variables to be treated as scalar or array variables.

       The "Env::import()" function ties environment variables with suitable
       names to global Perl variables with the same names.  By default it ties
       all existing environment variables ("keys %ENV") to scalars.  If the
       "import" function receives arguments, it takes them to be a list of
       variables to tie; it's okay if they don't yet exist. The scalar type
       prefix '$' is inferred for any element of this list not prefixed by '$'
       or '@'. Arrays are implemented in terms of "split" and "join", using
       $Config::Config{path_sep} as the delimiter.

       After an environment variable is tied, merely use it like a normal
       variable.  You may access its value

	   @path = split(/:/, $PATH);
	   print join("\n", @LD_LIBRARY_PATH), "\n";

       or modify it

	   $PATH .= ":.";
	   push @LD_LIBRARY_PATH, $dir;

       however you'd like. Bear in mind, however, that each access to a tied
       array variable requires splitting the environment variable's string
       anew.

       The code:

	   use Env qw(@PATH);
	   push @PATH, '.';

       is equivalent to:

	   use Env qw(PATH);
	   $PATH .= ":.";

       except that if $ENV{PATH} started out empty, the second approach leaves
       it with the (odd) value "":."", but the first approach leaves it with
       ""."".

       To remove a tied environment variable from the environment, assign it
       the undefined value

	   undef $PATH;
	   undef @LD_LIBRARY_PATH;

LIMITATIONS
       On VMS systems, arrays tied to environment variables are read-only.
       Attempting to change anything will cause a warning.

AUTHOR
       Chip Salzenberg <chip@fin.uucp> and Gregor N. Purdy <gregor@focusreā€
       search.com>

perl v5.8.8			  2004-05-07				Env(3)
[top]
                             _         _         _ 
                            | |       | |       | |     
                            | |       | |       | |     
                         __ | | __ __ | | __ __ | | __  
                         \ \| |/ / \ \| |/ / \ \| |/ /  
                          \ \ / /   \ \ / /   \ \ / /   
                           \   /     \   /     \   /    
                            \_/       \_/       \_/ 
More information is available in HTML format for server UnixWare

List of man pages available for UnixWare

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net