======================================================================== * README ======================================================================== NAME AppConfig - Perl5 module for reading configuration files and parsing command line arguments. SYNOPSIS use AppConfig; # create a new AppConfig object my $config = AppConfig->new( \%cfg ); # define a new variable $config->define( $varname => \%varopts ); # create/define combined my $config = AppConfig->new( \%cfg, $varname => \%varopts, $varname => \%varopts, ... ); # set/get the value $config->set( $varname, $value ); $config->get($varname); # shortcut form $config->varname($value); $config->varname; # read configuration file $config->file($file); # parse command line options $config->args(\@args); # default to \@ARGV # advanced command line options with Getopt::Long $config->getopt(\@args); # default to \@ARGV # parse CGI parameters (GET method) $config->cgi($query); # default to $ENV{ QUERY_STRING } OVERVIEW AppConfig is a Perl5 module for managing application configuration information. It maintains the state of any number of variables and provides methods for parsing configuration files, command line arguments and CGI script parameters. Variables values may be set via configuration files. Variables may be flags (On/Off), take a single value, or take multiple values stored as a list or hash. The number of arguments a variable expects is determined by its configuration when defined. # flags verbose nohelp debug = On # single value home = /home/abw/ # multiple list value file = /tmp/file1 file = /tmp/file2 # multiple hash value book camel = Programming Perl book llama = Learning Perl The '-' prefix can be used to reset a variable to its default value and the '+' prefix can be used to set it to 1 -verbose +debug Variable, environment variable and tilde (home directory) expansions can be applied (selectively, if necessary) to the values read from configuration files: home = ~ # home directory nntp = ${NNTPSERVER} # environment variable html = $home/html # internal variables img = $html/images Configuration files may be arranged in blocks as per the style of Win32 "INI" files. [file] site = kfs src = ~/websrc/docs/$site lib = ~/websrc/lib dest = ~/public_html/$site [page] header = $lib/header footer = $lib/footer You can also use Perl's "heredoc" syntax to define a large block of text in a configuration file. multiline = <.tar.gz /authors/id/ABW/AppConfig-.tar.gz AppConfig is distributed as a single gzipped tar archive file: AppConfig-.tar.gz Note that "" represents the current AppConfig version number, of the form "n.nn", e.g. "3.14". See the REVISION section below to determine the current version number for AppConfig. Unpack the archive to create a AppConfig installation directory: gunzip AppConfig-.tar.gz tar xvf AppConfig-.tar 'cd' into that directory, make, test and install the modules: cd AppConfig- perl Makefile.PL make make test make install The 't' sub-directory contains a number of test scripts that are run when a 'make test' is run. The 'make install' will install the module on your system. You may need administrator privileges to perform this task. If you install the module in a local directory (for example, by executing "perl Makefile.PL LIB=~/lib" in the above - see "perldoc MakeMaker" for full details), you will need to ensure that the PERL5LIB environment variable is set to include the location, or add a line to your scripts explicitly naming the library location: use lib '/local/path/to/lib'; The 'examples' sub-directory contains some simple examples of using the AppConfig modules. DESCRIPTION USING THE AppConfig MODULE To import and use the AppConfig module the following line should appear in your Perl script: use AppConfig; To import constants defined by the AppConfig module, specify the name of one or more of the constant or tag sets as parameters to "use": use AppConfig qw(:expand :argcount); See "CONSTANT DEFINITIONS" below for more information on the constant tagsets defined by AppConfig. AppConfig is implemented using object-oriented methods. A new AppConfig object is created and initialised using the new() method. This returns a reference to a new AppConfig object. my $config = AppConfig->new(); This will create and return a reference to a new AppConfig object. In doing so, the AppConfig object also creates an internal reference to an AppConfig::State object in which to store variable state. All arguments passed into the AppConfig constructor are passed directly to the AppConfig::State constructor. The first (optional) parameter may be a reference to a hash array containing configuration information. my $config = AppConfig->new( { CASE => 1, ERROR => \&my_error, GLOBAL => { DEFAULT => "", ARGCOUNT => ARGCOUNT_ONE, }, } ); See AppConfig::State for full details of the configuration options available. These are, in brief: CASE Used to set case sensitivity for variable names (default: off). CREATE Used to indicate that undefined variables should be created automatically (default: off). GLOBAL Reference to a hash array of global values used by default when defining variables. Valid global values are DEFAULT, ARGCOUNT, EXPAND, VALIDATE and ACTION. PEDANTIC Used to indicate that command line and configuration file parsing routines should return immediately on encountering an error. ERROR Used to provide a error handling routine. Arguments as per printf(). Subsequent parameters may be variable definitions. These are passed to the define() method, described below in "DEFINING VARIABLES". my $config = AppConfig->new("foo", "bar", "baz"); my $config = AppConfig->new( { CASE => 1 }, qw(foo bar baz) ); Note that any unresolved method calls to AppConfig are automatically delegated to the AppConfig::State object. In practice, it means that it is possible to treat the AppConfig object as if it were an AppConfig::State object: # create AppConfig my $config = AppConfig->new('foo', 'bar'); # methods get passed through to internal AppConfig::State $config->foo(100); $config->set('bar', 200); $config->define('baz'); $config->baz(300); DEFINING VARIABLES The "define()" method (delegated to AppConfig::State) is used to pre-declare a variable and specify its configuration. $config->define("foo"); Variables may also be defined directly from the AppConfig new() constructor. my $config = AppConfig->new("foo"); In both simple examples above, a new variable called "foo" is defined. A reference to a hash array may also be passed to specify configuration information for the variable: $config->define("foo", { DEFAULT => 99, ALIAS => 'metavar1', }); Configuration items specified in the GLOBAL option to the module constructor are applied by default when variables are created. e.g. my $config = AppConfig->new( { GLOBAL => { DEFAULT => "", ARGCOUNT => ARGCOUNT_ONE, } } ); $config->define("foo"); $config->define("bar", { ARGCOUNT => ARGCOUNT_NONE } ); is equivalent to: my $config = AppConfig->new(); $config->define( "foo", { DEFAULT => "", ARGCOUNT => ARGCOUNT_ONE, } ); $config->define( "bar", DEFAULT => "", ARGCOUNT => ARGCOUNT_NONE, } ); Multiple variables may be defined in the same call to define(). Configuration hashes for variables can be omitted. $config->define("foo", "bar" => { ALIAS = "boozer" }, "baz"); See AppConfig::State for full details of the configuration options available when defining variables. These are, in brief: DEFAULT The default value for the variable (default: undef). ALIAS One or more (list reference or "list|like|this") alternative names for the variable. ARGCOUNT Specifies the number and type of arguments that the variable expects. Constants in ":expand" tag set define ARGCOUNT_NONE - simple on/off flag (default), ARGCOUNT_ONE - single value, ARGCOUNT_LIST - multiple values accessed via list reference, ARGCOUNT_HASH - hash table, "key=value", accessed via hash reference. ARGS Used to provide an argument specification string to pass to Getopt::Long via AppConfig::Getopt. E.g. "=i", ":s", "=s@". This can also be used to implicitly set the ARGCOUNT value ("/^!/" = ARGCOUNT_NONE, "/@/" = ARGCOUNT_LIST, "/%/" = ARGCOUNT_HASH, "/[=:].*/" = ARGCOUNT_ONE) EXPAND Specifies which variable expansion policies should be used when parsing configuration files. Constants in ":expand" tag set define: EXPAND_NONE - no expansion (default) EXPAND_VAR - expand C<$var> or C<$(var)> as other variables EXPAND_UID - expand C<~> and C<~uid> as user's home directory EXPAND_ENV - expand C<${var}> as environment variable EXPAND_ALL - do all expansions. VALIDATE Regex which the intended variable value should match or code reference which returns 1 to indicate successful validaton (variable may now be set). ACTION Code reference to be called whenever variable value changes. COMPACT FORMAT DEFINITION Variables can be specified using a compact format. This is identical to the specification format of Getopt::Long and is of the form: "name|alias|alias" The first element indicates the variable name and subsequent ALIAS values may be added, each separated by a vertical bar '|'. The element indicates the ARGCOUNT value and may be one of the following; ! ARGCOUNT_NONE =s ARGCOUNT_ONE =s@ ARGCOUNT_LIST =s% ARGCOUNT_HASH Additional constructs supported by Getopt::Long may be specified instead of the "=s" element (e.g. "=f"). The entire element is stored in the ARGS parameter for the variable and is passed intact to Getopt::Long when the getopt() method is called. The following examples demonstrate use of the comapct format, with their equivalent full specifications: $config->define("foo|bar|baz!"); $config->define( "foo" => { ALIAS => "bar|baz", ARGCOUNT => ARGCOUNT_NONE, }); $config->define("name=s"); $config->define( "name" => { ARGCOUNT => ARGCOUNT_ONE, }); $config->define("file|filelist|f=s@"); $config->define( "file" => { ALIAS => "filelist|f", ARGCOUNT => ARGCOUNT_LIST, }); $config->define("user|u=s%"); $config->define( "user" => { ALIAS => "u", ARGCOUNT => ARGCOUNT_HASH, }); Additional configuration options may be specified by hash reference, as per normal. The compact definition format will override any configuration values provided for ARGS and ARGCOUNT. $config->define("file|filelist|f=s@", { VALIDATE = \&check_file() } ); READING AND MODIFYING VARIABLE VALUES AppConfig defines two methods (via AppConfig::State) to manipulate variable values set($variable, $value); get($variable); Once defined, variables may be accessed directly as object methods where the method name is the same as the variable name. i.e. $config->set("verbose", 1); is equivalent to $config->verbose(1); Note that AppConfig defines the following methods: new(); file(); args(); getopt(); And also, through delegation to AppConfig::State: define() get() set() varlist() If you define a variable with one of the above names, you will not be able to access it directly as an object method. i.e. $config->file(); This will call the file() method, instead of returning the value of the 'file' variable. You can work around this by explicitly calling get() and set() on a variable whose name conflicts: $config->get('file'); or by defining a "safe" alias by which the variable can be accessed: $config->define("file", { ALIAS => "fileopt" }); or $config->define("file|fileopt"); ... $config->fileopt(); Without parameters, the current value of the variable is returned. If a parameter is specified, the variable is set to that value and the result of the set() operation is returned. $config->age(29); # sets 'age' to 29, returns 1 (ok) print $config->age(); # prints "29" The varlist() method can be used to extract a number of variables into a hash array. The first parameter should be a regular expression used for matching against the variable names. my %vars = $config->varlist("^file"); # all "file*" variables A second parameter may be specified (any true value) to indicate that the part of the variable name matching the regex should be removed when copied to the target hash. $config->file_name("/tmp/file"); $config->file_path("/foo:/bar:/baz"); my %vars = $config->varlist("^file_", 1); # %vars: # name => /tmp/file # path => "/foo:/bar:/baz" READING CONFIGURATION FILES The AppConfig module provides a streamlined interface for reading configuration files with the AppConfig::File module. The file() method automatically loads the AppConfig::File module and creates an object to process the configuration file or files. Variables stored in the internal AppConfig::State are automatically updated with values specified in the configuration file. $config->file($filename); Multiple files may be passed to file() and should indicate the file name or be a reference to an open file handle or glob. $config->file($filename, $filehandle, \*STDIN, ...); The file may contain blank lines and comments (prefixed by '#') which are ignored. Continutation lines may be marked by ending the line with a '\'. # this is a comment callsign = alpha bravo camel delta echo foxtrot golf hipowls \ india juliet kilo llama mike november oscar papa \ quebec romeo sierra tango umbrella victor whiskey \ x-ray yankee zebra Variables that are simple flags and do not expect an argument (ARGCOUNT = ARGCOUNT_NONE) can be specified without any value. They will be set with the value 1, with any value explicitly specified (except "0" and "off") being ignored. The variable may also be specified with a "no" prefix to implicitly set the variable to 0. verbose # on (1) verbose = 1 # on (1) verbose = 0 # off (0) verbose off # off (0) verbose on # on (1) verbose mumble # on (1) noverbose # off (0) Variables that expect an argument (ARGCOUNT = ARGCOUNT_ONE) will be set to whatever follows the variable name, up to the end of the current line (including any continuation lines). An optional equals sign may be inserted between the variable and value for clarity. room = /home/kitchen room /home/bedroom Each subsequent re-definition of the variable value overwrites the previous value. print $config->room(); # prints "/home/bedroom" Variables may be defined to accept multiple values (ARGCOUNT = ARGCOUNT_LIST). Each subsequent definition of the variable adds the value to the list of previously set values for the variable. drink = coffee drink = tea A reference to a list of values is returned when the variable is requested. my $beverages = $config->drinks(); print join(", ", @$beverages); # prints "coffee, tea" Variables may also be defined as hash lists (ARGCOUNT = ARGCOUNT_HASH). Each subsequent definition creates a new key and value in the hash array. alias l="ls -CF" alias e="emacs" A reference to the hash is returned when the variable is requested. my $aliases = $config->alias(); foreach my $k (keys %$aliases) { print "$k => $aliases->{ $k }\n"; } The '-' prefix can be used to reset a variable to its default value and the '+' prefix can be used to set it to 1 -verbose +debug VARIABLE EXPANSION Variable values may contain references to other AppConfig variables, environment variables and/or users' home directories. These will be expanded depending on the EXPAND value for each variable or the GLOBAL EXPAND value. Three different expansion types may be applied: bin = ~/bin # expand '~' to home dir if EXPAND_UID tmp = ~abw/tmp # as above, but home dir for user 'abw' perl = $bin/perl # expand value of 'bin' variable if EXPAND_VAR ripl = $(bin)/ripl # as above with explicit parens home = ${HOME} # expand HOME environment var if EXPAND_ENV See AppConfig::State for more information on expanding variable values. The configuration files may have variables arranged in blocks. A block header, consisting of the block name in square brackets, introduces a configuration block. The block name and an underscore are then prefixed to the names of all variables subsequently referenced in that block. The block continues until the next block definition or to the end of the current file. [block1] foo = 10 # block1_foo = 10 [block2] foo = 20 # block2_foo = 20 PARSING COMMAND LINE OPTIONS There are two methods for processing command line options. The first, args(), is a small and efficient implementation which offers basic functionality. The second, getopt(), offers a more powerful and complete facility by delegating the task to Johan Vroman's Getopt::Long module. The trade-off between args() and getopt() is essentially one of speed/size against flexibility. Use as appropriate. Both implement on-demand loading of modules and incur no overhead until used. The args() method is used to parse simple command line options. It automatically loads the AppConfig::Args module and creates an object to process the command line arguments. Variables stored in the internal AppConfig::State are automatically updated with values specified in the arguments. The method should be passed a reference to a list of arguments to parse. The @ARGV array is used if args() is called without parameters. $config->args(\@myargs); $config->args(); # uses @ARGV Arguments are read and shifted from the array until the first is encountered that is not prefixed by '-' or '--'. At that point, the method returns 1 to indicate success, leaving any unprocessed arguments remaining in the list. Each argument should be the name or alias of a variable prefixed by '-' or '--'. Arguments that are not prefixed as such (and are not an additional parameter to a previous argument) will cause a warning to be raised. If the PEDANTIC option is set, the method will return 0 immediately. With PEDANTIC unset (default), the method will continue to parse the rest of the arguments, returning 0 when done. If the variable is a simple flag (ARGCOUNT = ARGCOUNT_NONE) then it is set to the value 1. The variable may be prefixed by "no" to set its value to 0. myprog -verbose --debug -notaste # $config->verbose(1) # $config->debug(1) # $config->taste(0) Variables that expect an additional argument (ARGCOUNT != 0) will be set to the value of the argument following it. myprog -f /tmp/myfile # $config->file('/tmp/file'); Variables that expect multiple values (ARGCOUNT = ARGCOUNT_LIST or ARGCOUNT_HASH) will have sucessive values added each time the option is encountered. myprog -file /tmp/foo -file /tmp/bar # $config->file('/tmp/foo') # $config->file('/tmp/bar') # file => [ '/tmp/foo', '/tmp/bar' ] myprog -door "jim=Jim Morrison" -door "ray=Ray Manzarek" # $config->door("jim=Jim Morrison"); # $config->door("ray=Ray Manzarek"); # door => { 'jim' => 'Jim Morrison', 'ray' => 'Ray Manzarek' } See AppConfig::Args for further details on parsing command line arguments. The getopt() method provides a way to use the power and flexibility of the Getopt::Long module to parse command line arguments and have the internal values of the AppConfig object updates automatically. The first (non-list reference) parameters may contain a number of configuration string to pass to Getopt::Long::Configure. A reference to a list of arguments may additionally be passed or @ARGV is used by default. $config->getopt(); # uses @ARGV $config->getopt(\@myargs); $config->getopt(qw(auto_abbrev debug)); # uses @ARGV $config->getopt(qw(debug), \@myargs); See Getopt::Long for details of the configuration options available. The getopt() method constructs a specification string for each internal variable and then initialises Getopt::Long with these values. The specification string is constructed from the name, any aliases (delimited by a vertical bar '|') and the value of the ARGS parameter. $config->define("foo", { ARGS => "=i", ALIAS => "bar|baz", }); # Getopt::Long specification: "foo|bar|baz=i" Errors and warning generated by the Getopt::Long module are trapped and handled by the AppConfig error handler. This may be a user-defined routine installed with the ERROR configuration option. Please note that the AppConfig::Getopt interface is still experimental and may not be 100% operational. This is almost undoubtedly due to problems in AppConfig::Getopt rather than Getopt::Long. PARSING CGI PARAMETERS The cgi() method provides an interface to the AppConfig::CGI module for updating variable values based on the parameters appended to the URL for a CGI script. This is commonly known as the CGI "GET" method. The CGI "POST" method is currently not supported. Parameter definitions are separated from the CGI script name by a question mark and from each other by ampersands. Where variables have specific values, these are appended to the variable with an equals sign: http://www.here.com/cgi-bin/myscript?foo=bar&baz=qux&verbose # $config->foo('bar'); # $config->baz('qux'); # $config->verbose(1); Certain values specified in a URL must be escaped in the appropriate manner (see CGI specifications at http://www.w3c.org/ for full details). The AppConfig::CGI module automatically unescapes the CGI query string to restore the parameters to their intended values. http://where.com/mycgi?title=%22The+Wrong+Trousers%22 # $config->title('"The Wrong Trousers"'); Please be considerate of the security implications of providing writeable access to script variables via CGI. http://rebel.alliance.com/cgi-bin/... .../send_report?file=%2Fetc%2Fpasswd&email=darth%40empire.com To avoid any accidental or malicious changing of "private" variables, define only the "public" variables before calling the cgi() (or any other) method. Further variables can subequently be defined which can not be influenced by the CGI parameters. $config->define('verbose', 'debug') $config->cgi(); # can only set verbose and debug $config->define('email', 'file'); $config->file($cfgfile); # can set verbose, debug, email + file CONSTANT DEFINITIONS A number of constants are defined by the AppConfig module. These may be accessed directly (e.g. AppConfig::EXPAND_VARS) or by first importing them into the caller's package. Constants are imported by specifying their names as arguments to "use AppConfig" or by importing a set of constants identified by its "tag set" name. use AppConfig qw(ARGCOUNT_NONE ARGCOUNT_ONE); use AppConfig qw(:argcount); The following tag sets are defined: :expand The ':expand' tagset defines the following constants: EXPAND_NONE EXPAND_VAR EXPAND_UID EXPAND_ENV EXPAND_ALL # EXPAND_VAR | EXPAND_UID | EXPAND_ENV EXPAND_WARN See AppConfig::File for full details of the use of these constants. :argcount The ':argcount' tagset defines the following constants: ARGCOUNT_NONE ARGCOUNT_ONE ARGCOUNT_LIST ARGCOUNT_HASH See AppConfig::State for full details of the use of these constants. AUTHOR Andy Wardley, With contributions from Dave Viner, Ijon Tichy, Axel Gerstmair and many others whose names have been lost to the sands of time (reminders welcome). COPYRIGHT Copyright (C) 1997-2007 Andy Wardley. All Rights Reserved. Copyright (C) 1997,1998 Canon Research Centre Europe Ltd. This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO AppConfig::State, AppConfig::File, AppConfig::Args, AppConfig::Getopt, AppConfig::CGI, Getopt::Long ======================================================================== * LICENSE ======================================================================== Terms of Perl itself a) the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version, or b) the "Artistic License" ---------------------------------------------------------------------------- The General Public License (GPL) Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave, Cambridge, MA 02139, USA. 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If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. 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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS ---------------------------------------------------------------------------- The Artistic License Preamble The intent of this document is to state the conditions under which a Package may be copied, such that the Copyright Holder maintains some semblance of artistic control over the development of the package, while giving the users of the package the right to use and distribute the Package in a more-or-less customary fashion, plus the right to make reasonable modifications. Definitions: - "Package" refers to the collection of files distributed by the Copyright Holder, and derivatives of that collection of files created through textual modification. - "Standard Version" refers to such a Package if it has not been modified, or has been modified in accordance with the wishes of the Copyright Holder. - "Copyright Holder" is whoever is named in the copyright or copyrights for the package. - "You" is you, if you're thinking about copying or distributing this Package. - "Reasonable copying fee" is whatever you can justify on the basis of media cost, duplication charges, time of people involved, and so on. (You will not be required to justify it to the Copyright Holder, but only to the computing community at large as a market that must bear the fee.) - "Freely Available" means that no fee is charged for the item itself, though there may be fees involved in handling the item. It also means that recipients of the item may redistribute it under the same conditions they received it. 1. You may make and give away verbatim copies of the source form of the Standard Version of this Package without restriction, provided that you duplicate all of the original copyright notices and associated disclaimers. 2. You may apply bug fixes, portability fixes and other modifications derived from the Public Domain or from the Copyright Holder. A Package modified in such a way shall still be considered the Standard Version. 3. You may otherwise modify your copy of this Package in any way, provided that you insert a prominent notice in each changed file stating how and when you changed that file, and provided that you do at least ONE of the following: a) place your modifications in the Public Domain or otherwise make them Freely Available, such as by posting said modifications to Usenet or an equivalent medium, or placing the modifications on a major archive site such as ftp.uu.net, or by allowing the Copyright Holder to include your modifications in the Standard Version of the Package. b) use the modified Package only within your corporation or organization. c) rename any non-standard executables so the names do not conflict with standard executables, which must also be provided, and provide a separate manual page for each non-standard executable that clearly documents how it differs from the Standard Version. d) make other distribution arrangements with the Copyright Holder. 4. You may distribute the programs of this Package in object code or executable form, provided that you do at least ONE of the following: a) distribute a Standard Version of the executables and library files, together with instructions (in the manual page or equivalent) on where to get the Standard Version. b) accompany the distribution with the machine-readable source of the Package with your modifications. c) accompany any non-standard executables with their corresponding Standard Version executables, giving the non-standard executables non-standard names, and clearly documenting the differences in manual pages (or equivalent), together with instructions on where to get the Standard Version. d) make other distribution arrangements with the Copyright Holder. 5. You may charge a reasonable copying fee for any distribution of this Package. You may charge any fee you choose for support of this Package. You may not charge a fee for this Package itself. However, you may distribute this Package in aggregate with other (possibly commercial) programs as part of a larger (possibly commercial) software distribution provided that you do not advertise this Package as a product of your own. 6. The scripts and library files supplied as input to or produced as output from the programs of this Package do not automatically fall under the copyright of this Package, but belong to whomever generated them, and may be sold commercially, and may be aggregated with this Package. 7. C or perl subroutines supplied by you and linked into this Package shall not be considered part of this Package. 8. The name of the Copyright Holder may not be used to endorse or promote products derived from this software without specific prior written permission. 9. THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. The End